112 results on '"Liu, Xiao-Ming"'
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2. Automatic recognition and intelligent analysis of central shrinkage defects of continuous casting billets based on deep learning
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Lian, Gong-hao, Sun, Qi-hao, Liu, Xiao-ming, Kong, Wei-miao, Lv, Ming, Qi, Jian-jun, Liu, Yong, Yuan, Ben-ming, and Wang, Qiang
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The internal quality inspection of the continuous casting billets is very important, and mis-inspection will seriously affect the subsequent production process. The UNet-VGG16 transfer learning model was used for semantic segmentation of the central shrinkage defects of the continuous casting billets. The automatic recognition accuracy of the central shrinkage defects of the continuous casting billets reaches more than 0.9. We use the minimum circumscribed rectangle to quantify the geometric dimensions such as length, width and area of the central shrinkage defects and use the threshold method to rate the central shrinkage defects of the continuous casting billets. The results show that all the testing images are rated correctly, and this method achieves the automatic recognition and intelligent analysis of the central shrinkage defects of the continuous casting billets.
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- 2023
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3. Laboratory Safety of Dupilumab, and Its Effect on Inflammatory Biomarkers, in Chinese Adults With Moderate-to-Severe Atopic Dermatitis: An Analysis of a Randomized, Double-Blind Phase III Study
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Zhao, Yan, Wu, Li-Ming, Lu, Qian-Jin, Gao, Xing-Hua, Zhu, Xiao-Hong, Yao, Xu, Li, Lin-Feng, Li, Wei, Ding, Yang-Feng, Song, Zhi-Qiang, Liu, Ling-Ling, Dang, Ning-Ning, Zhang, Chun-Lei, Liu, Xiao-Ming, Gu, Jun, Wang, Jin-Yan, Geng, Song-Mei, Liu, Quan-Zhong, Guo, Yi-Feng, Dong, Li, Li, Shelley, Xu, Christine, O’Malley, John T., Laws, Elizabeth, Amin, Nikhil, Bansal, Ashish, Wang, Min, and Zhang, Jian-Zhong
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- 2022
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4. Data‐Driven Investigation Reveals Subaerial Proportion of Basalts Since the Early Archean
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Liu, Chun‐Tao, Liu, Xiao‐Ming, and ZhangZhou, J.
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The subaerial exposure of the modern continental crust through time remains intensely debated, with estimates of the first exposure ranging from the late Archean to the Neoproterozoic. To constrain when and how much of the continental crust was exposed subaerially during Earth's history, we trained a supervised machine learning model on the compositions of modern subaerial and submerged basalts. Then, we applied this well‐trained model to a refined worldwide data set of basaltic compositions and calculated the mean proportions of basalts erupted subaerially since 3.8 billion years ago (Ga). Our results suggest that ∼20% of the basalts were exposed subaerially in the early Archean, which may have driven the synthesis of biopolymers crucial to the origins and evolution of life. The proportion of subaerial basalts increased markedly during two stages between the late Archean and the Paleoproterozoic before reaching the present‐day level no earlier than ∼1.8 Ga. Although land only covers about 30% of Earth's surface, it plays a crucial role in our planet's ecosystem by interacting with the ocean and atmosphere. Scientists are still debating when and how much land was above sea level throughout history. In our study, we used a machine learning technique to analyze the chemical compositions of basalts and classified rocks that formed on land and under water. We then used this program to study rocks from different times in Earth's history and estimate how much land was above the oceans over time. We found that about 15%–30% of the continents were above the oceans about 3.8 to 2.8 billion years ago (Ga). This may have helped life evolve by creating molecules essential for living things. The amount of land above water increased significantly during two periods between 2.8 and 1.8 Ga and reached today's level no earlier than 1.8 Ga. Improve the geochemical data quality of global basaltic rocksMachine learning can effectively classify subaerially and subaqueously erupted basaltsThe subaerial proportion of basalts may reach present‐day level at about 1.8 billion years ago to a maximum Improve the geochemical data quality of global basaltic rocks Machine learning can effectively classify subaerially and subaqueously erupted basalts The subaerial proportion of basalts may reach present‐day level at about 1.8 billion years ago to a maximum
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- 2024
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5. Composition evolution and deformation of different non-metallic inclusions in a bearing steel during hot rolling
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Liu, Nan, Cheng, Gong, Zhang, Li-feng, Yang, Wen, Ren, Ying, Wang, Guo-cheng, and Liu, Xiao-ming
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The composition evolution and deformation of different non-metallic inclusions in a bearing steel during hot rolling were investigated by the automatic detection and the improved non-aqueous electrolysis method. Manganese sulfide, MnS–TiN, and liquid CaO–Al2O3inclusions were elongated while TiN and MgO⋅Al2O3were fractured during hot rolling. The CaS–MnS phase in the MgO–Al2O3–CaS–MnS inclusion was separated from the inclusion, leading to the formation of CaS–MnS type clusters. Meanwhile, the CaS and MnS contents in oxide-containing inclusions decreased while the MgO and Al2O3contents increased after hot rolling. The deformability of different inclusions in the bearing steel was quantitatively compared and discussed.
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- 2022
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6. Flow fields control for bubble refinement induced by electromagnetic fields
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Wang, Lian-yu, Liu, Ze-yi, He, Ming, Liu, Xiao-ming, Sano, Masamichi, Zhao, Li-jia, and Wang, Qiang
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Large bubbles seriously reduce the efficiencies of the interactions between the bubbles and the molten steel, such as energy transfer, momentum transfer, mass transfer and chemical reaction. To reduce the size of the bubbles and increase the gas–liquid interface area, a novel non-intrusive method of bubble refinement was proposed, which only depends on the molten steel flow field controlled by the rotating electromagnetic field. The flow fields of the molten steel for bubble refinement were analyzed, and the corresponding bubble refinement was investigated. It was found that the molten steel formed obvious rotating turbulent flow for bubble refinement under the unidirectional rotating electromagnetic field. However, the large vortex in the center of the molten pool caused by the rotating flow made the bubbles aggregate and coalesce again, resulting in formation of larger bubbles and gas cavity. To suppress the central vortex formation and enhance the bubble refinement, the forward-reverse rotating electromagnetic field for bubble refinement was proposed. The irregular and chaotic flow occurred repeatedly because of alternating forward and reverse rotating in a short period, so that the turbulent kinetic energy and turbulent dissipation of the flow field always remained at a high level which favors bubble refinement. As a result, the bubble diameter can decrease by more than 50% compared to that without electromagnetic field. Furthermore, it is important that this non-intrusive kind of bubble refinement method completely avoids the introduction of non-metallic inclusions caused by intrusive configuration.
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- 2022
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7. Cytogenetic Characteristics of Childhood Acute Lymphoblastic Leukemia: A Study of 1541 Chinese Patients Newly Diagnosed between 2001 and 2014
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Yin, Meng-meng, Wu, Rui-chi, Gao, Jing, Hu, Shao-yan, Liu, Xiao-ming, Zhu, Xiao-fan, Shen, Shu-hong, Tang, Jing-yan, Chen, Jing, and Hu, Qun
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Objective: Cytogenetic abnormalities have been proven to be the most valuable parameter for risk stratification of childhood acute lymphoblastic leukemia (ALL). However, studies on the prevalence of cytogenetic abnormalities and their correlation to clinical features in Chinese pediatric patients are limited, especially large-scale studies. Methods: We collected the cytogenetics and clinical data of 1541 children newly diagnosed with ALL between 2001 and 2014 in four Chinese hospitals, and retrospectively analyzed their clinical features, prognosis and risk factors associated with pediatric ALL. Results: All of these patients had karyotyping results, and some of them were tested for fusion genes by fluorescence in situhybridization or reverse-transcription polymerase chain reaction. Overall, 930 cases (60.4%) had abnormal cytogenetics in this study, mainly including high hyperdiploidy (HHD, n=276, 17.9%), hypodiploidy (n=74, 4.8%), t(12;21)/TEL-AML1 (n=260, 16.9%), t(1;19)/E2A-PBX1 (n=72, 4.7%), t(9;22)/BCR-ABL(n=64, 4.2%), and t(v;11q23)/MLLrearrangements (n=40, 2.6%). The distribution of each cytogenetic abnormality was correlated with gender, age, white blood cell count at diagnosis, and immunophenotype. In addition, multivariate analysis suggested that t(v;11q23)/MLL rearrangements (OR: 2.317, 95%CI: 1.219–3.748, P=0.008) and t(9;22)/BCR-ABL(OR: 2.519, 95%CI: 1.59–3.992, P<0.001) were independent risk factors for a lower event-free survival (EFS) rate in children with ALL, while HHD (OR: 0.638, 95%CI: 0.455–0.894, P=0.009) and t(12;21)/TEL-AML1(OR: 0.486, 95%CI: 0.333–0.707, P<0.001) were independent factors of a favorable EFS. Conclusion: The cytogenetic characteristics presented in our study resembled other research groups, emphasizing the important role of cytogenetic and molecular genetic classification in ALL, especially in B-ALL.
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- 2022
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8. Therapeutic effect of indirubin-loaded bovine serum albumin nanoparticules on ulcerative colitisElectronic supplementary information (ESI) available. See https://doi.org/10.1039/d1bm01896e
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Yu, Guang-Min, Zhou, Li-Feng, Liu, Xiao-Ming, Liu, Bin, Lai, Xue-Ying, Xu, Chu-Lan, Long, Ming-Yi, Zhu, Yan-Ming, Wang, Ji-De, and Li, Ming-Song
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Indirubin is considered to have promising potential in the treatment of ulcerative colitis (UC). However, poor aqueous solubility and low bioavailability limit its clinical application. We produced indirubin-loaded bovine serum albumin nanoparticles (INPs) and characterized their drug encapsulation efficiency, drug-loading capacity, capacity to release indirubin in vitroand short-term physical stability. We also investigated the pharmacokinetics of INPs in mice. We then compared the curative effects of INPs and indirubin against dextran sulfate sodium-induced colitis in mice and 3D cultured biopsies from patients with UC. In the mouse model, the outcomes of INP treatment, including the disease activity index and serous levels of interleukin (IL)-1β and IL-10, were significantly different from those of indirubin treatment. Similarly, when we administered INPs and indirubin to the ex vivocolonic tissues of patients with UC, the effect of INPs was stronger than that of indirubin for most antioxidant and anti-inflammatory biomarkers. The results of both the animal trial and ex vivoexperiment indicate that the therapeutic effect of indirubin was further enhanced by the carrier system, making it a highly promising medical candidate for UC.
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- 2022
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9. Persistent late permian to early triassic warmth linked to enhanced reverse weathering
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Cao, Cheng, Bataille, Clément P., Song, Haijun, Saltzman, Matthew R., Tierney Cramer, Kate, Wu, Huaichun, Korte, Christoph, Zhang, Zhaofeng, and Liu, Xiao-Ming
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In the Precambrian, reverse weathering—a process consuming oceanic silica, metal cations and alkalinity to form marine clays—was a key control of the long-term carbon cycle. However, the appearance of marine silicifiers decreased the importance of this process in regulating climate in the Phanerozoic eon. Here, we present seawater lithium and strontium isotope records derived from bulk carbonates and fossil brachiopods spanning the Permian to Early Triassic, an interval of pronounced climatic fluctuations and widespread extinctions. We show that the lithium isotope composition of seawater remained constant for most of the Permian until a sharp decrease in the Late Permian (~254 Myr ago) with low seawater Li isotope values (~10‰) persisting throughout the Early Triassic. Based on box modelling, changes in chemical weathering and hydrothermal fluxes are unable to explain the abrupt decline in seawater Li isotopes. Rather, increased lithium output fluxes through enhanced reverse weathering are required to produce the low Li isotope values of the Late Permian and Early Triassic (253–247 Myr ago). Increased reverse weathering rates could explain the failure of chemical weathering to draw down atmospheric CO2levels during the Early Triassic, leading to protracted biotic recovery from the Permian–Triassic mass extinction.
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- 2022
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10. Confined Synthesis of Oriented Two-Dimensional Ni3(hexaiminotriphenylene)2 Films for Electrocatalytic Oxygen Evolution Reaction.
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Liu, Xuan-He, Yang, Ya-Wen, Liu, Xiao-Ming, Hao, Qing, Wang, Li-Mei, Sun, Bing, Wu, Jing, and Wang, Dong
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- 2020
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11. Effects of nitrogen fertilizer and chemical regulation on spring maize lodging characteristics, grain filling and yield formation under high planting density in Heilongjiang Province, China
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LIU, Xiao-ming, GU, Wan-rong, LI, Cong-feng, LI, Jing, and WEI, Shi
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Now, lodging is a major constraint factor contributing to yield loss of maize (Zea maysL.) under high planting density. Chemical regulation and nitrogen fertilizer could effectively coordinate the relationship between stem lodging and maize yield, which significantly reduce lodging and improve the grain yield. The purpose of this study was to explore the effects of chemical regulation and different nitrogen application rates on lodging characteristics, grain filling and yield of maize under high density. For this, we established a field study during 2017 and 2018 growing seasons, with three nitrogen levels of N100 (100 kg ha–1), N200 (200 kg ha–1) and N300 (300 kg ha–1) at high planting density (90 000 plants ha–1), and applied plant growth regulator (Yuhuangjin, the mixture of 3% DTA-6 and 27% ethephon) at the 7th leaf. The results showed that chemical control increased the activities of phenylalanine ammonia-lyase (PAL), tyrosine ammonia-lyase (TAL), 4-coumarate:CoA ligase (4CL), and cinnamyl alcohol dehydrogenase (CAD), and increased the lignin, cellulose and hemicellulose contents at the bottom of the 3rd internode, which significantly reduced the lodging percentage. The lignin-related enzyme activities, lignin, cellulose and hemicellulose contents decreased with the increase of nitrogen fertilizer, which significantly increased the lodging percentage. The 200 kg ha–1nitrogen application and chemical control increased the number, diameter, angle, volume, and dry weight of brace roots. The 200 kg ha–1nitrogen application and chemical control significantly increased the activities of ADP-glucose pyrophosphorylase (AGPase), soluble starch synthase (SSS) and starch branching enzyme (SBE), which promoted the starch accumulation in grains. Additional, improved the maximum grain filling rate (Vmax) and mean grain filling rate (Vm), which promoted the grain filling process, significantly increased grain weight and grain number per ear, thus increased the final yield.
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- 2021
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12. Similar Long‐Term Clinical Outcomes of Deep Brain Stimulation With Different Electrode Targets for Primary Meige Syndrome: One Institution's Experience of 17 Cases
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Tian, Han, Xiong, Nan‐xiang, Xiong, Nian, Liu, Xiao‐ming, Rao, Jing, Xiang, Wei, Jiang, Xiao‐bing, Zhao, Hong‐yang, and Fu, Peng
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Deep brain stimulation (DBS) is considered an effective and safe treatment for patients with primary Meige syndrome (MS). Both the subthalamic nucleus (STN) and globus pallidus pars internus (Gpi) have been shown to be optional targets for electrode implantation to improve clinical symptoms, but the relationship between clinical outcomes and target is still unclear. The current study aims to compare the clinical outcomes of DBS with different electrode targets for primary MS. We performed a retrospective study to assess the clinical outcomes for 17 consecutive patients with primary MS in Wuhan Union Hospital from January 2016 to September 2019. Six patients were treated by Gpi‐DBS and 11 patients were treated by STN‐DBS. All patients were assessed before surgery and at the last follow‐up after surgery. The Burke‐Fahn‐Marsden Dystonia Rating Scale (BFMDRS) including the movement and disability scales was used to evaluate the dystonia severity of the eyes, the mouth, speech, and swallowing. The median follow‐up duration was 30.1 ± 13.1 months (range 6 months–52 months). In our study, DBS improved the BFMDRS‐M scores by 70.52 ± 7.45% and the BFMDRS‐D scores by 70.51 ± 8.38% for patients with MS. STN‐DBS and Gpi‐DBS had similar effects not only on the BFMDRS‐M and BFMDRS‐D scores, but also on the subitems including eyes, mouth, speech, and swallowing. The stimulation voltage for the Gpi was significantly higher than that for the STN. The improvements were similar in the general anesthesia and local anesthesia groups (p> 0.05). The curative effects of STN‐DBS and Gpi‐DBS on patients with primary MS are similar. Both the STN and Gpi could be effective targets of DBS for primary MS.
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- 2021
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13. Confined Synthesis of Oriented Two-Dimensional Ni3(hexaiminotriphenylene)2Films for Electrocatalytic Oxygen Evolution Reaction
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Liu, Xuan-He, Yang, Ya-Wen, Liu, Xiao-Ming, Hao, Qing, Wang, Li-Mei, Sun, Bing, Wu, Jing, and Wang, Dong
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Metal–organic frameworks (MOFs) can provide atomically dispersed metal active coordination sites (M–NX, M–SX, and M–OX) for electrocatalytic reactions. Among them, MOFs with motif M–NXor analogues are expected to be promising active electrode materials for oxygen evolution reaction (OER). Contrary to bulk MOFs, two-dimensional (2D) MOFs usually have high surface areas, fully exposed active sites, and specific electrical properties. Herein, we constructed 2D Ni3(hexaiminotriphenylene)2[Ni3(HITP)2] films on the electrode surface by utilizing the bottom-up liquid/liquid/gel tri-phase interface system and explored their potential applications in electrocatalytic OER. The thickness of the 2D Ni3(HITP)2films can be controlled to be about 5 nm. The prepared 2D Ni3(HITP)2films had oriented polycrystalline character and showed excellent performance in OER. A current density of 10 mA cm–2for 3-layer Ni3(HITP)2film electrodes was obtained at 1.62 V, which was 20 mV lower than that for the commercial IrO2catalyst. Electrochemical tests and electrochemical impedance spectroscopy showed that better OER performance of 3-layer Ni3(HITP)2films was ascribed to their high electrochemically active surface area, better kinetic process, and fast ion diffusion and transport.
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- 2020
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14. Comparison of the Osteoporosis Self-Assessment Tool for Asians and the fracture risk assessment tool - FRAX to identify densitometric defined osteoporosis: A discriminatory value analysis in a multi-ethnic female population in Southeast Asia
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Chandran, Manju, Chin, Yun Ann, Choo, Kuan Swen, Ang, Wan Chen, Huang, Xiao Feng, Liu, Xiao Ming, Tay, Donovan, Aung, Tin Kyaw Kyaw, Ali, Amin, Thu, Win Pa Pa, Logan, Susan, Yan, Sean Xuexian, Lekamwasam, Sarath, and Hao, Ying
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The accuracy of FRAX® as a screening tool to identify osteoporosis and how it compares with tools such as Osteoporosis Self-Assessment Tool for Asians (OSTA), in Southeast Asian women has so far been unexplored. We aimed to determine the FRAX® thresholds that accurately identify densitometric osteoporosis and to compare its performance with that of OSTA for this purpose.
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- 2020
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15. Circulating Dickkof-1 as a potential biomarker associated with the prognosis of patients with rheumatoid arthritis-associated interstitial lung disease
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Xue, Jing, Wang, Yu-Jiao, Xia, He-Chun, Liang, Xue-Yun, Cui, Jie-Da, Yu, Min, Liu, Xiao-Ming, Chi, Shu-Hong, Chen, Juan, and Guo, Li-Shao
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- 2021
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16. Characterization of Induced Pluripotent Stem Cells from Human Epidermal Melanocytes by Transduction with Two Combinations of Transcription Factors
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Cheng, Sai, Li, Di, Zhang, Ru-Zhi, Zhu, Jing, Wang, Li, Liu, Qi, Chen, Ren-He, and Liu, Xiao-Ming
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Objective: In order to generate induced Pluripotent Stem Cells (iPSCs) more efficiently, it is crucial to identify somatic cells that are easily accessible and possibly require fewer factors for conversion into iPSCs. Methods: Human epidermal melanocytes were transduced with lentiviral vectors carrying 3 transcription factors (OCT-4, KLF-4 and c-MYC, 3F) or 4 transcription factors (OCT-4, KLF-4, c-MYC and SOX-2, 4F). Once the clones had formed, assays related to stem cell pluripotency, including alkaline phosphatase staining, DNA methylation levels, expression of stem cell markers and ultrastructure analysis were carried out. The iPSCs obtained were then induced to differentiate into the cells representing the three embryonic layers in vitro. Results: Seven days after the transduction of epidermal melanocytes with 3F or 4F, clones were formed that were positive for alkaline phosphatase staining. Fluorescent staining with antibodies against OCT-4 and SOX-2 was strongly positive, and the cells showed a high nucleus-cytoplasm ratio and active karyokinesis. No melanosomes were found in the cytoplasm by ultrastructural analysis. There were obvious differences in DNA methylation levels between the cloned cells and their parental cells. However, there was not a significant difference between 3F or 4F transfected clonal cells. Meanwhile, the iPSCs successfully differentiated into the three germ layer cells in vitro. Conclusion: Human epidermal melanocytes do not require ectopic SOX-2 expression for conversion into iPSCs, and may serve as an alternative source for deriving patient-specific iPSCs with fewer genetic elements.
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- 2019
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17. Effect of shade stress on lignin biosynthesis in soybean stems
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LIU, Wei-guo, REN, Meng-lu, LIU, Ting, DU, Yong-li, ZHOU, Tao, LIU, Xiao-ming, LIU, Jiang, Hussain, Sajad, and YANG, Wen-yu
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To clarify how shade stress affects lignin biosynthesis in soybean stem, two varieties, Nandou 12 (shade tolerant) and Nan 032-4 (shade susceptible) grew under normal light and shade conditions (the photosynthetically active radiation and the ratio of red:far-red were lower than normal light condition). Lignin accumulation, transcripts of genes involved in lignin biosynthesis, and intermediates content of lignin biosynthesis were analyzed. Both soybean varieties suffered shade stress had increased plant heights and internode lengths, and reduced stem diameters and lignin accumulation in stems. The expression levels of lignin-related genes were significantly influenced by shade stress, with interactions between the light environment and variety. The gene of 3-hydroxylase (C3H), cinnamoyl-CoA reductase (CCR),caffeoyl-CoA O-methyltransferase (CCoAOMT), and peroxidase (POD)attributed to lignin biosynthesis under shade stress, and the down-regulation of these genes resulted in lower caffeic, sinapic, and ferulic acid levels, which caused a further decrease in lignin biosynthesis. Under shade stress, the shade tolerant soybean variety (Nandou 12) showed stiffer stems, higher lignin content, and greater gene expression level and higher metabolite contents than shade susceptible one. So these characteristics could be used for screening the shade-tolerant soybean for intercropping.
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- 2018
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18. Suitability of various DNA extraction methods for a traditional Chinese paocai system
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Zhao, Nan, Cai, Jialiang, Zhang, Chuchu, Guo, Zhuang, Lu, Wenwei, Yang, Bo, Tian, Feng-Wei, Liu, Xiao-Ming, Zhang, Hao, and Chen, Wei
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ABSTRACTTraditional paocai brine (PB), which is continuously propagated by back-slopping and contains various species of lactic acid bacteria (LAB), is critical for the flavor of paocai. Culture-independent approaches are commonly used to investigate the microbial communities of fermented food. To evaluate the influence of different DNA (DNA) extraction methods on estimates of bacterial community profiles from 4 PBs, the lysis efficiency, DNA yield, purity and denaturing gradient gel electrophoresis (DGGE) profiles of V3 region of a 16S ribosomal ribonucleic acid gene were acquired. The cell lysis pattern of SDS + beads and Lysing matrix E+ beads (methods 3 and 4) showed higher cell lysis efficiency than SDS and SDS + Lysozyme (methods 1 and 2) in all PBs. SDS + beads obtained the largest DNA yield of the 4 methods. Moreover, methods 3 and 4 resulted in higher H′ values and generated more global bacteria profiles than other methods. Overall, our results demonstrate that the properties of PB significantly affect the efficiency of DNA extraction methods. Methods 3 and 4 were both suitable for DNA extraction from PB. Method 3 is more economic, simple and rapid than method 4 for large-scale studies of the bacterial profiles of PB.
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- 2017
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19. Risk factors for cage retropulsion after lumbar interbody fusion surgery: Series of cases and literature review.
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Pan, Fu-Min, Wang, Shan-Jin, Yong, Zhi-Yao, Liu, Xiao-Ming, Huang, Yu-Feng, and Wu, De-Sheng
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Objective: To identify the risk factors for cage retropulsion after lumbar interbody fusion surgery.Methods: 667 patients underwent lumbar interbody fusion surgery between November 2011 to December 2014 were retrospectively reviewed by the medical recording system in our institute. 8 patients experiencing cage retropulsion were included and 2 underwent the initial surgery in other hospitals. The clinical outcomes were evaluated by visual analog scores (VAS) and Oswestry Disability Index (ODI). Plain radiographs and three-dimensional computed tomography scans were used to analyze the incidence of cage retropulsion. Data were analyzed by SPSS 19.0.Results: The incidence of cage retropulsion was 0.90%(6 out of 665) in our institution. There were 6 male and 2 female with an average age of 45.63 ± 15.48(range, 21-60). The average follow-up time was 23.88 ± 12.69 months(range, 6-43 months) and average retropulsion onset time was 2.75 months(range,1-6 months). 6 patients experienced cage retropulsion at L5/S1 and 2 at L4/5. 6 used bullet-shaped cages and two had kidney-shaped cages. Average bed rest time after the initial surgery was 5.75 ± 1.67 days. 6 patients had neurological deficits and underwent revision surgery. Average operation time and blood loss for revision surgery were much higher than those of the initial surgery (P < 0.05). All the patients got a good result in VAS and ODI both from initial surgery and revision surgery (P < 0.05).Conclusions: There were multiple risk factors for cage retropulsion after lumbar interbody fusion surgery, including patient factors, radiological characteristics, surgical techniques and postoperative reasons. In case of retropulsion, revision surgery was essential for the patients who presented neurological deficits and conservative treatment was recommended for asymptomatic patients. [ABSTRACT FROM AUTHOR]- Published
- 2016
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20. Knockdown of the olfactory co-receptor Orco impairs mate recognition in Tenebrio molitor (Coleoptera: Tenebrionidae).
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Liu, Xiao-Ming, Zhang, Bang-Xian, Li, Shi-Guang, Rao, Xiang-Jun, Wang, Dong-Ming, Hu, Xiao-Xuan, and Liu, Su
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The yellow mealworm beetle, Tenebrio molitor (Coleoptera: Tenebrionidae), is a common insect pest that damages stored grain. The insect olfactory co-receptor ( Orco ) is a transmembrane protein localized on the surface of the dendrites of olfactory sensory neurons and plays an essential role in the olfactory perception. In this study, an Orco ortholog (named as Tmol \ Orco ) in T. molitor was characterized. The deduced amino acid sequence of Tmol \ Orco shared significant high identities with Orco s in other insect species from distinct Orders. Reverse transcription quantitative PCR (RT-qPCR) analysis showed that Tmol \ Orco was predominantly expressed in the antennae of both male and female adults, and the difference between male antennae and female antennae was not significant. Double-stranded RNA (dsRNA) directly against the Tmol \ Orco mRNA was synthesized and injected into the T. molitor male adults, RT-qPCR results demonstrated that the transcription level of Tmol \ Orco was significantly reduced at 6 d after the injection. The mate-seeking behavior of Tmol \ Orco -silenced beetles was significantly inhibited. Compare to the control individuals, the percentage of Tmol \ Orco -silenced beetles successfully find mates was significantly decreased and the average time they spent for searching were significantly increased. These results provided first direct evidence that suppression of Tmol \ Orco transcription contributes to the decline in mate recognition of T. molitor . [ABSTRACT FROM AUTHOR]
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- 2016
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21. Subtractionless compressed-sensing-accelerated whole-body MR angiography using two-point Dixon fat suppression with single-pass half-reduced contrast dose: feasibility study and initial experience
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Fu, Qing, Lei, Zi-qiao, Li, Jing-yang, Wu, Jia-wei, Liu, Xiao-ming, Fan, Wen-liang, Sun, Peng, Wang, Jia-zheng, Liu, Ding-xi, Yang, Fan, Zheng, Chuan-sheng, and Kong, Xiang-chuang
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To investigate the feasibility and clinical utility of a compressed-sensing-accelerated subtractionless whole-body MRA (CS-WBMRA) protocol with only contrast injection for suspected arterial diseases, by comparison to conventional dual-pass subtraction-based whole-body MRA (conventional-WBMRA) and available computed tomography angiography (CTA).
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- 2023
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22. Capacity of Right-Turn Lane at Signalized Intersection under Pedestrian-Bicycle Effect
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Gao, Chao, Liu, Xiao-Ming, and Yang, Xiao-Kuan
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The effect of pedestrian and bicycle infrastructure is used to analyze the capacity for right-turn lane at signalized intersection. Each cycle at the signalized intersection was divided into several periods. The effect of pedestrian and bicycle at each period was analyzed. The number of right-turn cars going through signalized intersection was calculated by using probability theory and mathematical statistics. The capacity under the effect of pedestrian and bicycle for right-turn lane at signalized Intersection was deduced. The calculated results were deduced by using the survey data of two signalized intersections at Jinan city. The mean difference values are 8% and 10.1%, compared with VISSIM simulation results. The comparisons show that this model can fully describe the effect of pedestrian and bicycle to signalized intersection.
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- 2016
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23. Direct Reduction of High-phosphorus Oolitic Hematite Ore Based on Biomass Pyrolysis
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HUANG, Dong-bo, ZONG, Yan-bing, WEI, Ru-fei, GAO, Wei, and LIU, Xiao-ming
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Direct reduction of high-phosphorus oolitic hematite ore based on biomass pyrolysis gases (CO, H2, and CH4), tar, and char was conducted to investigate the effects of reduction temperature, iron ore-biomass mass ratio, and reduction time on the metallization rate. In addition, the effect of particle size on the dephosphorization and iron recovery rate was studied by magnetic separation. It was determined that the metallization rate of the hematite ore could reach 99. 35% at iron ore-biomass mass ratio of 1: 0. 6, reduction temperature of 1100 °C, and reduction time of 55 min. The metallization rate and the aggregation degree of iron particles increase with the increase of reduction temperature. The particle size of direct reduced iron (DRI) has a great influence on the quality of the iron concentrate during magnetic separation. The separation degree of slag and iron was improved by the addition of 15 mass% sodium carbonate. DRI with iron grade of 89. 11%, iron recovery rate of 83. 47%, and phosphorus content of 0. 28% can be obtained when ore fines with particle size of — 10 μm account for 78. 15%.
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- 2016
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24. Direct Reduction of High-phosphorus Oolitic Hematite Ore Based on Biomass Pyrolysis
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Huang, Dong-bo, Zong, Yan-bing, Wei, Ru-fei, Gao, Wei, and Liu, Xiao-ming
- Abstract
Direct reduction of high-phosphorus oolitic hematite ore based on biomass pyrolysis gases (CO, H2, and CH4), tar, and char was conducted to investigate the effects of reduction temperature, iron ore-biomass mass ratio, and reduction time on the metallization rale. In addition, the effect of particle size on the dephosphorization and iron recovery rate was studied by magnetic separation. It was determined that the metallization rate of the hematite ore could reach 99. 35% at iron ore-biomass mass ratio of 1: 0. 6, reduction temperature of 1100 °C, and reduction time of 55 min. The metallization rate and the aggregation degree of iron particles increase with the increase of reduction temperature. The particle size of direct reduced iron (DRI) has a great influence on the quality of the iron concentrate during magnetic separation. The separation degree of slag and iron was improved by the addition of 15 mass% sodium carbonate. DRI with iron grade of 89. 11%, iron recovery rate of 83. 47%, and phosphorus content of 0. 28% can be obtained when ore fines with particle size of – 10 μm account for 78. 15%.
- Published
- 2016
- Full Text
- View/download PDF
25. Rare earth element geochemistry in soils along arid and semiarid grasslands in northern China
- Author
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Cao, Yi-Wen, Liu, Xiao-Ming, Wang, Chao, Bai, Edith, and Wu, Nanping
- Abstract
Background: Rare earth elements (REE) are a group of trace elements that behave geochemically coherently. REE fractionation patterns normalized to reference materials provide a powerful tool for documenting pedogenesis. In-soil processes are particularly difficult to illustrate with respect to contemporary and past climate conditions. In this study, we characterize the rare earth element (REE) contents in bulk soils and respective geochemical fractions (e.g., exchangeable, carbonate-bound, reducible, and oxidizable fractions) and to decipher the relationships between REE geochemistry components and climatic factors across a large-scale northern China transect (NCT). Results: Across the NCT, bulk REE concentrations ranged from 55.2 to 241.1 μg g
−1 with a main portion in the residual fraction (49–79%), followed by oxidizable fraction (2–40%), reducible fraction (3–22%), carbonate-bound fraction (0.1–16%), and negligible exchangeable fraction. The REE contents of geochemical components (carbonate-bound, reducible, and oxidizable) in topsoils correlated to climate factors (mean annual precipitation, mean annual temperature, potential evaporation, and aridity index (AI)). The normalized abundances to the upper continental crust (UCC) composition show that the middle REE was generally enriched than the light REE and heavy REE in topsoils along the transect. The overall UCC-normalized bulk REE patterns in topsoils and subsoils were similar, characterized by weak negative Ce anomalies and positive Eu anomalies. Conclusions: Our data in topsoils and depth profiles collectively suggest that cycling of REE was primarily regulated by abiotic processes in area with AI < 0.2, while the biological effect on REE circulation in soil played a more effective role in area with AI > 0.3. The similar UCC normalized patterns in topsoils suggest that the REE was originated from a common source with limited influences from other sources (e.g., atmospheric dusts and anthropogenic contributions). Our results to some extent provide evidence for climatic influence REE distribution patterns both in topsoils and subsoils across the continental-scale transect. Our investigation gives insights into future studies on vertical REE mobility and its associated biogeochemical pathways.- Published
- 2022
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26. Publisher Correction: Persistent late Permian to Early Triassic warmth linked to enhanced reverse weathering
- Author
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Cao, Cheng, Bataille, Clément P., Song, Haijun, Saltzman, Matthew R., Tierney Cramer, Kate, Wu, Huaichun, Korte, Christoph, Zhang, Zhaofeng, and Liu, Xiao-Ming
- Published
- 2022
- Full Text
- View/download PDF
27. Effect of reduced N application on soil N residue and N loss in maize-soybean relay strip intercropping system.
- Author
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LIU Xiao-ming, YONG Tai-wen, LIU Wen-yu, SU Ben-ying, SONG Chun, YANG Feng, WANG Xiao-chun, and YANG Wen-yu
- Abstract
A field experiment was conducted in 2012, including three planting pattern (maize-oybean relay strip intercropping, mono-cultured maize and soybean) and three nitrogen application level [0 kg N.hm
-2 , 180 kg N.hm-2 (reduced N) and 240 kg N.hm-2 (normal N)]. Fields were assigned to different treatments in a randomized block design with three replicates. The objective of this work was to analyze the effects of planting patterns and nitrogen application rates on plant N uptake, soil N residue and N loss. After fertilization applications, NH4 + -N and NO3 - -N levels increased in the soil of intercropped maize but decreased in the soil of intercropped soybean. Compared with monocrops, the soil N residue and loss of intercropped soybean were reduced, while those of intercropped maize were increased and decreased, respectively. With the reduced rate of N application, N residue rate, N loss rate and ammonia volatilization loss rate of the maize-soybean intercropping relay strip system were decreased by 17. 7%, 21. 5% and 0. 4% compared to monocultured maize, but increased by 2. 0%, 19. 8% and 0. 1% compared to mono-cultured soybean, respectively. Likewise, the reduced N application resulted in reductions in N residue, N loss, and the N loss via ammonia volatilization in the maizesoybean relay strip intercropping system compared with the conventional rate of N application adopted by local farmers, and the N residue rate, N loss rate and ammonia volatilization loss rate reduced by 12. 0%, 15. 4% and 1. 2%, respectively. [ABSTRACT FROM AUTHOR]- Published
- 2014
28. Effects of reduced N application rate on yield and nutrient uptake and utilization in maize-soybean relay strip intercropping system.
- Author
-
YONG Tai-wen, LIU Xiao-ming, LIU Wen-yu, SU Ben-ying, SONG Chun, YANG Feng, WANG Xiao-chun, and YANG Wen-yu
- Abstract
A field experiment with three N application rates (0, 180, 240 N kg ∙ hm
-2 , representing zero, reduced and conventional N application, respectively) and three planting patterns (maize monoculture, soybean monoculture and maize-soybean relay strip intercropping) was conducted to reveal the effects of cropping patterns and N application rates on yield, nutrient uptake and nitrogen use efficiency of maize and soybean. The results showed that the grain yield, N, P and K uptake and harvest index of the intercropped maize reduced slightly compared with the monoculture maize, however these indices of the intercropped soybean increased significantly compared with the monoculture. With the increase in nitrogen fertilizer application, the excellence of relay strip intercropping was weakened in the maize-soybean intercropping system. The grain yield, economic coefficient, N, P and K uptake, harvest index, N agronomy efficiency and N uptake efficiency of maize and soybean increased significantly at the reduced nitrogen rate (180 N kg ∙ hm-2 ), but the rate of soil N contribution declined, compared with the conventional rate of N application by local farmers (240 N kg ∙ hm-2 ). In the reduced nitrogen rate treatment, total soil N and P contents of the maize strip reduced, whereas the total soil N, P and K contents of soybean strip and the total K content of maize strip increased compared with the zero N application treatment. With the reduced N application, the annual total grain yield, N, P and K uptake of above-ground biomass in the maize-soybean relay strip intercropping system were higher than in the monoculture, and the land equivalent ratio (LER) was 2. 28. N uptake efficiency of maize in the relay strip intercropping system was 20. 2% higher than in the maize monoculture, and the index of soybean was 30. 5% lower than in the monoculture. The rate of soil N contribution in the relay strip intercropping system was 20. 0% and 8.8% lower than in the maize and soybean monoculture, respectively. The reduced N application in the maize-soybean relay strip intercropping system was helpful to promote annual grain yield and improve N utilization efficiency. [ABSTRACT FROM AUTHOR]- Published
- 2014
29. Comparative pharmacokinetics of five saponins after intravenous administration of TSFS injection and TSFS injection plus TFFG in rats under different physiological states.
- Author
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Liu, Xiao-Ming, Zhao, Xing, Gao, En-Ze, Zhao, Yun-Li, Liu, Zheng, and Yu, Zhi-Guo
- Subjects
PHARMACOKINETICS ,SAPONINS ,INTRAVENOUS therapy ,LABORATORY rats ,CHINESE medicine ,BLOOD circulation ,THERAPEUTICS - Abstract
Abstract: Sanqi is a popular traditional Chinese medicine and commonly used for promoting blood circulation and removing blood stasis. Notoginsenoside R1, ginsenoside Rg1, Re, Rb1 and Rd are the major active constituents of Sanqi. The purpose of the study was to investigate the pharmacokinetic behavior of the five active constituents from total saponin from Sanqi when it was used in the blood stasis animals or in combination with Gegen. The concentrations of the five active constituents in rat plasma were determined by an ultra-HPLC–ESI–MS/MS method. The main pharmacokinetic parameters were calculated and statistically analyzed using the unpaired student's t-test. It was found that the pharmacokinetic parameters of notoginsenoside R1, ginsenoside Rg1 and Rb1 represented a statistically significant difference (P<0.05) between the normal rats and the blood stasis rats after administration of total saponin from Sanqi (TSFS). And there were statistically significant differences (P<0.05) in the pharmacokinetic parameters of all the five constituents between administration of TSFS alone and combined with total flavonoid from Gegen (TFFG) in blood stasis rats. It suggested that the pharmacokinetic behavior of the active constituents from TSFS could be changed when it was used in blood stasis animals or in combination with TFFG. [Copyright &y& Elsevier]
- Published
- 2014
- Full Text
- View/download PDF
30. Static Characteristic Analysis of Pneumatic Planar Flexible Bending Joint
- Author
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Liu, Hong Bo, Geng, De Xu, Zhao, Yun Wei, Liu, Xiao Ming, and Wu, Guang Bin
- Abstract
This paper introduces the structure and working principle of planar flexible bending joint .It uses compressed air to drive the deformation, which can realize elongation and bending. On the basis of force and torque balance analysis, the relationship between the elongation and bending angle of joint and the air pressure are acquired. Experimental system is constructed on the static experimental device. Due to the errors of manufacture technology, the correction coefficient is introduced. The statics model can better reflect the process of movement after introducing a correction factor.
- Published
- 2014
- Full Text
- View/download PDF
31. Adaptive Radar Sensitivity Time Control Based on Linear Prediction Sea Clutter
- Author
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Liu, Yun Feng, Suo, Ji Dong, Liu, Xiao Ming, and Li, Bo
- Abstract
Sea clutter is interference background in radar target processing. It is difficult to detect long-range weak target in sea clutter. Sea clutter signal changes complex, with high intensity. For close signal, radar receiver will overload and reach saturation point. We are interested in the most dynamic range for displaying target echo and fast changing component of clutter. By analyzing spatial and temporal correlation of sea clutter, slow changing component can be minus from sea clutter. The innovation of this paper is to propose a linear prediction error method for sea clutter to increase dynamic range of radar receiver. It prevents overloading and reaching saturation point at close range.
- Published
- 2014
- Full Text
- View/download PDF
32. Regression and Re-understanding of Original Meaning in "The Confucian Analects".
- Author
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LIU Wei and LIU Xiao-ming
- Subjects
MEANING (Philosophy) ,CONFUCIANISM ,CONFUCIAN philosophy ,CONFUCIAN doctrines ,HISTORICAL linguistics - Abstract
With the passage of time, there is a new correspondence between the original form and the changed meaning in some parts of "The Confucian Analects", and thus it becomes important to deal well with the relationship between the original meaning and the changed meaning in the book. To re-understand some parts of the book, the following aspects should be taken into account: the subjective activity in interpreting the text, the conventionality of language signs, the economy of language tools, the gratification in communications, the synchronic accumulation of words meaning's diachronic evolution, the conversion of parts of speech, the change of sentence patterns, and restrictions of context. [ABSTRACT FROM AUTHOR]
- Published
- 2013
33. The origin and response of zircon in eclogite to metamorphism during the multi-stage evolution of the Huwan Shear Zone, China: Insights from Lu–Hf and U–Pb isotopic and trace element geochemistry.
- Author
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Peters, Timothy J., Ayers, John C., Gao, Shan, and Liu, Xiao-Ming
- Subjects
ZIRCON ,ECLOGITE ,METAMORPHISM (Geology) ,TRACE elements ,HAFNIUM isotopes - Abstract
Abstract: The Huwan Shear Zone (HSZ) is an eclogite bearing transpressive wrench zone located along the Shangdan Suture that juxtaposes the Paleozoic Qinling and Mesozoic Hong''an–Dabie orogenic terrains. The region preserves a complex history that bridges the gap between adjacent orogenic terrains. Simultaneous in-situ trace element, U–Th–Pb and Lu–Hf‐isotope analysis of zircon grains from samples of the Xiongdian and Sujiahe eclogite identify a late Carboniferous to early Permian period of high pressure metamorphism, ca. 283 to 306Ma. Zircon grains are observed to respond to metamorphic overprint via a two stage process: (1) An initial prograde stage of fluid catalyzed interface coupled dissolution–reprecipitation, involving exsolution of a non-ideal solid solution thorite (ThSiO
4 ) end member and loss of highly incompatible components (LREE and Pb), (2) A second stage of coupled zircon dissolution, coarsening, and new rim growth in equilibrium with garnet at high pressure conditions. We identify Proterozoic whole rock Sm–Nd and zircon grain Lu–Hf isotopic evidence which challenges the traditional interpretation that the Xiongdian and Sujiahe eclogite formed in response to early Paleozoic mantle melting and oceanic crust generation. We argue the Huwan Shear Zone contains no conclusive evidence of early/middle Paleozoic oceanic crust, but rather Proterozoic crustal components analogous to those found in the Northern Qinling Terrain and associated with formation of the Shangdan Suture. We present a simpler geodynamic model involving continuous convergence and accretion of terrains onto the southern margin of the North China Block during the Paleozoic Qinling and Mesozoic Dabie orogenies. [Copyright &y& Elsevier]- Published
- 2013
- Full Text
- View/download PDF
34. A Question Classification Method Combining Domain Ontology and Question Focus.
- Author
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Liu Xiao-Ming, Fan Xiao-Zhong, and Li Fang-Fang
- Subjects
QUESTION (Logic) ,CLASSIFICATION ,ONTOLOGY ,SEMANTICS ,CATEGORIES (Philosophy) - Abstract
Question classification is one of most important tasks of question analysis in question answer system. A novel question classification method combining domain ontology and question focus is proposed in this article. First, with the supports of predefined structure of question focus and extracting rules, the semantic representation of question focus is fetched from the results of shallow semantic analysis including dependency analysis and semantic role labeling. Then, questions are labeled with the IDs of question objects in domain ontology. Thus, according to the fact of "same questions have same focus, and questions with different focuses are of different questions", questions with same focus are classified into the same category. The experimental result found that 93.91% accuracy for 1 905 special questions in restricted domain of computer troubleshooting could be achieved by using the proposed method. It demonstrates the validity of question focus and domain ontology in question classification task. [ABSTRACT FROM AUTHOR]
- Published
- 2012
35. Tracing the position of the South China block in Gondwana: U–Pb ages and Hf isotopes of Devonian detrital zircons.
- Author
-
Duan, Liang, Meng, Qing-Ren, Zhang, Cheng-Li, and Liu, Xiao-Ming
- Subjects
ZIRCON ,GEOLOGICAL time scales ,URANIUM-lead dating ,CONTINENTAL margins ,DEVONIAN stratigraphic geology ,HAFNIUM isotopes ,QUARTZ ,SANDSTONE ,GONDWANA (Continent) - Abstract
Abstract: U–Pb detrital zircon geochronology from Lower Devonian quartz arenites of the northwestern margin of the Yangtze block yields dominant early Neoproterozoic (0.85–1.0Ga), Pan-African (0.5–0.65Ga) and middle Neoproterozoic (0.68–0.8Ga) age populations and minor Mesoproterozoic to middle Mesoarchean (1.0–3.0Ga) ages. Middle Mesoarchean to Mesoproterozoic rocks, however, are widespread in the South China block. Although Hf isotopic compositions show both juvenile crustal growth and crustal reworking for all the age groupings, the crust growth, essentially mantle-derived, occurred mainly around 3.1Ga, 1.9Ga and 1.0Ga, respectively. Zircon typology and youngest grain ages indicate that this suite of quartz arenites was the product of multiphase reworking. Abundant magmatic zircon detritus with concordant U–Pb Grenvillian and Pan-African ages, together with accompanying various ε
Hf(t) values, indicate an exotic provenance for the quartz arenite external to the South China block. Qualitative comparisons of age spectra for the late Neoproterozoic sediments of the Cathaysian Block, early Paleozoic sediments of pre-rift Tethyan Himalaya sequence in North India and lower Paleozoic sandstone from the Perth Basin in West Australia, show that they all have two the largest age clusters representing Grenvillian and Pan-African orogenic episodes. The resemblance of these age spectra and zircon typology suggests that the most likely source for the Lower Devonian quartz arenites of the South China block was the East African Orogen and Kuunga Orogen for their early Grenvillian and Pan-African populations, whereas the Hannan–Panxi arc, Jiangnan orogen, and the Yangtze block basements might have contributed to the detrital zircon grains of the Neoproterozoic and Pre-Grenvillian ages. Hf isotopic data indicate that the crustal evolution of the drainage area matches well with the episodic crust generation of Gondwana. These results imply that the previously suggested position of the SCB in Gondwana should be re-evaluated, and the South China block should be linked with North India and West Australia as a part of East Gondwana during the assembly of Gondwana, rather than a discrete continent block in the paleo-Pacific. [Copyright &y& Elsevier]- Published
- 2011
- Full Text
- View/download PDF
36. A Comparative Research on the Indexes of Offense Techniques between Chinese Team and Its Opponents in the 15th FIBA Men's World Championship.
- Author
-
Liu Xiao-ming
- Published
- 2008
37. On the developmental course from "cultivate the commonalties" to "popularization" on the physical teaching for women since modern China.
- Author
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Liu Xiao-ming and Liu Di-e
- Published
- 2007
38. Hardware Design of Automotive Parking Heater Remoter and Receiver
- Author
-
Ge, Yue Tao, Liu, Xiao Ming, and Yin, Xiao Tong
- Abstract
In order to achieve 600 meters radio frequency communication and 2-10 meters serial cable communication between remote controller and parking heater, the paper designed the hardware of remote controller and vehicle receivers. Select CC1100 as radio frequency chip, select PIC16F914, ATmega16L as remote control and receiver SPI control chip, select CE8301, LM117 as remote control and receiver power supply module. Finally, the circuit diagram of the receiver and remoter are designed.
- Published
- 2014
- Full Text
- View/download PDF
39. An Improved Cluster Key Management Algorithm for Wireless Sensor Networks
- Author
-
Zhao, Qi Sheng, Liu, Xiao Ming, and Zhu, Hui Sheng
- Abstract
The information security of wireless sensor networks is one of hot issues on the current research; this paper combines threshold key scheme with the management of security key sharing and group agreement and proposes dynamic key management scheme through clustering level key matrix of authentication mechanism from the cluster to node. The network is divided into different clusters, and the cluster head conducts the key authentication exchange and updates the key management with threshold key schemes, with no need of third authentication center, reduces the computing and communication costs, and promotes communication.
- Published
- 2014
- Full Text
- View/download PDF
40. Method Based on Multi-Attribute Decision Making of Receiving-End Power Grid DC Location Selection
- Author
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Liu, Xiao Ming, Niu, Xin Sheng, Wang, Yuan, Wang, Yi Qun, Wu, Kui Hua, Lan, Feng, Li, Li Sheng, and Zhang, Tian Bao
- Abstract
For Receiving-end AC system, DC location selection depends on its role in supporting the DC system and economy. This paper proposes a method based on multi-attribute decision making of receiving-end power grid DC location selection. First, the balance of power DC location selected by region; then select the optimal placement through multi-attribute decision making; finally checked by calculating the feasibility of the selected placement. Zha Lute DC Shandong receiving-end power grid placement choice proved the effectiveness of the proposed method.
- Published
- 2014
- Full Text
- View/download PDF
41. Assessment of Selenium Bioavailability in Tea Plantation Soil to Bashan Tea Species (Wanyuan, Southwest China) Using Single Extraction Methods
- Author
-
Zhang, Xin Kai, Li, Ze Qin, and Liu, Xiao Ming
- Abstract
Se concentration varies for different soil types, whether can be absorbed by plants is not related with the total amount of selenium, it is controlled by the bio-availability Se in soil. This paper is aim to look for the laws of the bio-availability Se in different soils, and find out an accuracy and effective method to extract the bio-available Se from different soil types. Digest the soil and tea leaves samples and used six methods (KH
2 PO4 , NaHCO3 , HAC, MgCl2 , HCl, EDTA) to extract Se from the different soils, the result was measured by AFS. The mean values of total Se is 8.45μg/g in carbonaceous slates soil, 0.32μg/g and 0.41μg/g in malmstone soil, 0.78μg/g in shale soil. The maximum correlation coefficients (r) between the six extract methods and tea leaves about the extraction ratio of Se in four soils is 0.93188 with KH2 PO4 , 0.77097 and 0.83589 with NaHCO3 , 0.84231 with HAC. So it can be indicate that the total Se contents is carbonaceous slates soil>shale soil>malmstone soil, the best extract method for carbonaceous slates soil, malmstone soil and shale soil are KH2 PO4 , NaHCO3 , and HAC respectively.- Published
- 2014
- Full Text
- View/download PDF
42. Study on TEA Encryption for Public Communication Network Wireless Remoter
- Author
-
Ge, Yue Tao, Liu, Xiao Ming, and Yin, Xiao Tong
- Abstract
In order to realize wireless remoter not only securely but also quickly data transmission in the public communication network, the Tiny Encryption Algorithm (TEA) encryption and decryption algorithm is studied in this paper and the properties of TEA are analyzed. According to communication protocol of remoter, encryption and decryption program process are designed. Because of TEA encryption, remoter transmitter and receiver can communicate strongly in the public communication network.
- Published
- 2014
- Full Text
- View/download PDF
43. Cultivation of Innovative Software Talents Based on Social Needs
- Author
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Liu, Xiao Ming, Liu, Xian De, and Li, Bing
- Abstract
In this paper, concerning the current situation of software talents' fostering and training in China, and combining the practical conditions of Northeast Petroleum University software engineering, we have conducted research and practice from the following three aspects: innovation of curriculum system that meeting the society needs, student-oriented teaching methods innovation, construction of "double qualified" vocational teaching staff, school-enterprise cooperation and cultivation of individuality.
- Published
- 2014
- Full Text
- View/download PDF
44. Characterization of Thermal Reversible Cross-Linking Agents for Flexible Poly(vinyl chloride)
- Author
-
Wang, Jing, Fang, Wei, Yuan, Yuan, and Liu, Xiao Ming
- Abstract
In order to improve thermal stability of Poly (Vinyl Chloride), a kind of thermal reversible cross-linking agents, the end cyclopentadienyl ethanethiol salts, sodium cyclopentadienyl ethyl mercaptan (CPD-C
2 H4 SNa) was synthesized in this paper. The DSC results proved that the prepared CPD-C2 H4 SNa has obvious thermal reversible characteristics and the thermal reversible temperature was at 177 °C. The effects of cross-linking agent amount, cross-linking reactive time and temperature on flexible PVC compounds were evaluated through gel content testing. It was showed that the cross-linking agent with 3 Phr is optimum for PVC compounds. Moreover, both the cross-linking reactive time and temperature has effects on gel content of PVC compounds. The gel content of CPD-C2 H4 SNa cross-linked PVC compounds reaches maximum at 76% for 20 min at 160 °C.The static thermal stability of flexible PVC was measured according to congo red method. The results showed that the thermal stability of PVC compounds was enhanced with increasing cross-linking agent amount.- Published
- 2014
- Full Text
- View/download PDF
45. Research and Exploration of Cultivating College Students' Innovative and Practice Ability
- Author
-
Li, Bing and Liu, Xiao Ming
- Abstract
Traditional practice teaching has many disadvantages, especially the lack of the cultivation of the college students innovative ability. Under the drive of the new situation, to study and exploring practical teaching, through the practice of the new teaching and stimulate students interest in learning,cultivate students' project ability to demand analysis, general design and detailed design, at the same time, it can improve the students' team spirit and innovation ability.
- Published
- 2014
- Full Text
- View/download PDF
46. Double Negative Optical Metamaterial with All-Dielectric Fishnet Structure
- Author
-
Lan, Chu Wen, Fu, Xiao Jian, Liu, Xiao Ming, Li, Bo, and Zhou, Ji
- Abstract
An all-dielectric fishnet metamaterial (DFM) composed of multilayer dielectric structure with periodically patterned holes is proposed to generate left-handed behavior in optical frequency region. Different from the metallic fishnet negative index metamaterial realized by coupling the neighbouring functional layers along the propagation direction, this DFM owes its simultaneous negative permeability and permittivity to the hybrid coupled resonances in the same layer. Based on this configration, a wide-band and polarization-independent negative refraction with maximum figure of merit as large as 13.85 is obtained by a silicon-based DFM at 450 nm wavelength. Simple and easy to fabricate, this concept is believed to provide an alternative route to realize high-performance negative index metamateirals at optical frequencies.
- Published
- 2013
- Full Text
- View/download PDF
47. Perfect Absorber Based on Mie Dielectric Metamaterials
- Author
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Liu, Xiao Ming, Lan, Chu Wen, Zhao, Qian, and Zhou, Ji
- Abstract
An isotropic Mie resonance-based metamaterial perfect absorber with near unity absorbance is experimentally and numerically demonstrated. The metamaterial is constructed with an array of dielectric cubes and a metallic ground plane. A good agreement between experimental and simulated result at X band absorption is achieved, the absorptivities are 97% and 98% at 9.96 GHz, separately. The absorption peak of the metamaterial perfect absorber is dependent on the permittivity, the size and the array pattern of the dielectric particles. The Mie resonance of dielectric particles provides a novel mechanism for creating the electric and magnetic resonances and offers a simpler route for the isotropic metamaterial perfect absorber with near unity absorbance.
- Published
- 2013
- Full Text
- View/download PDF
48. Study on the Decoder for Reed-Solomon (255, 239) Code
- Author
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Ge, Yue Tao, Liu, Xiao Ming, and Yin, Xiao Tong
- Abstract
Reed Solomon code is described as a theoretical decoder that corrected errors by finding the most popular message polynomial. The Verilog language is applied to descript decoding algorithm. Cyclone series FPGA EP1C6Q240C8 is adopted as a core of hardware platform and a serial port communication part is used to receive input error correction data. The results show that it can successfully correct eight errors, which is the limitation of error correction. With the RS decoder, it can ensure that the strong error correction capability and fast speed.
- Published
- 2013
- Full Text
- View/download PDF
49. On Health Monitor Technology Development for Damaged Aircraft Structures
- Author
-
Liu, Xiao Ming, Ge, Yue Tao, and Yin, Xiao Tong
- Abstract
This paper seeks to outline the concept and application of health monitoring system in aircraft structure. The focus is placed on the principles and methods of the structural health monitoring system, including SMART layers, electric potential method, Acoustic Emission, etc. The difference between the above monitoring methods is justified and clarified. Finally a perspective view on structural health monitor techniques is discussed.
- Published
- 2013
- Full Text
- View/download PDF
50. Identification and Evaluation of the Virus-Induced Mosaic Camellia reticulata in Southwest China
- Author
-
Chang, Qing, Li, Pei, Wang, Chen, Liu, Xiao Ming, and Zheng, Wei
- Abstract
The virus-induced mosaic Camellia reticulata cultivars in southwest China were identified, and evaluated for their ornamental value and bio-security in landscape. The results show that 11 virus-induced mosaic Camellia reticulata cultivars are found. The virus in mosaic leaves is spherical, with 30-50 nm in diameter. For the mosaic leaves, the chloroplasts are degraded in the yellow macular region, and the content of chlorophyll is significantly decreased. However, the virus-induced mosaic Camellia reticulata grow normally, and with significantly improved of visual appeal due to mosaic leaves. Further, the virus-induced mosaic Camellia reticulata have no bio-security threats to the main crops and other landscape plants. Thus, the virus-induced mosaic Camellia reticulata can be cultivated normally in the landscape in southwest China.
- Published
- 2013
- Full Text
- View/download PDF
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