86 results on '"Wang, Jian-hua"'
Search Results
2. A New Magnetically Active Binary System Discovered in Yunnan-Hong Kong Wide Field Survey
- Author
-
GU Sheng-hong, Wang Jian-hua, Bill Yeung, Eric Ng, and Wang Xiao-bin
- Subjects
Physics ,Faint Object Spectrograph ,010308 nuclear & particles physics ,Starspot ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astronomy and Astrophysics ,Astrophysics ,Orbital period ,Light curve ,01 natural sciences ,law.invention ,Telescope ,Radial velocity ,Photometry (astronomy) ,Space and Planetary Science ,law ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Earth and Planetary Astrophysics ,Binary system ,010303 astronomy & astrophysics - Abstract
We present a newly discovered magnetically active binary system detected by Yunnan-Hong Kong wide field survey, with an orbital period of 0.60286 days. Two color photometry for the system was performed using the 1 m Cassegrain telescope of Yunnan Observatories with its CCD (Charge-Coupled Device) camera. In the observed light curves, there are clearly different light maxima existed in the out-of-eclipse regions. We made spectroscopic observations for the binary system using the 2.4 m telescope and YFOSC (Yunnan Faint Object Spectrograph and Camera) of Lijiang station of Yunnan Observatories, China. The radial velocity curve was derived for primary star of the binary system. The primary star exhibited strong chromospheric activity, which confirms that the distortion of the light curves results from the starspot activity on the primary star. Through analyzing the light curves and RV (Radial Velocity) curve mentioned above by means of the W-D (Wilson-Devinney) code, orbital parameters and starspot configuration of the binary system are obtained. Finally, we have discussed the properties of the binary system, and given the prospects on the future work.
- Published
- 2021
- Full Text
- View/download PDF
3. Synergy between Toxoplasma gondii type I ? GRA17 immunotherapy and PD-L1 checkpoint inhibition triggers the regression of targeted and distal tumors
- Author
-
Zhu, Yu Chao, Elsheikha, Hany M., Wang, Jian Hua, Fang, Shuai, He, Jun Jun, Zhu, Xing Quan, and Chen, Jia
- Subjects
Pharmacology ,Cancer Research ,Oncology ,Immunology ,Molecular Medicine ,Immunology and Allergy - Abstract
Background: In this study, we hypothesize that the ability of the protozoan Toxoplasma gondii to modulate immune response within the tumor might improve the therapeutic effect of immune checkpoint blockade. We examined the synergetic therapeutic activity of attenuated T. gondii RH ΔGRA17 strain and programmed death ligand-1 (PD-L1) treatment on both targeted and distal tumors in mice. Methods: The effects of administration of T. gondii RH ΔGRA17 strain on the tumor volume and survival rate of mice bearing flank B16-F10, MC38, or LLC tumors were studied. We characterized the effects of ΔGRA17 on tumor biomarkers’ expression, PD-L1 expression, immune cells infiltrating the tumors, and expression of immune-related genes by using immunohistochemistry, immunofluorescence, flow cytometry, NanoString platform, and real time quantitative PCR, respectively. The role of immune cells in the efficacy of ΔGRA17 plus PD-L1 blockade therapy was determined via depletion of immune cell subtypes.Results: Treatment with T. gondii ΔGRA17 tachyzoites and anti-PD-L1 therapy significantly extended the survival of mice and suppressed tumor growth in preclinical mouse models of melanoma, Lewis lung carcinoma, and colon adenocarcinoma. Attenuation of the tumor growth was detected in the injected and distant tumors, which was associated with upregulation of innate and adaptive immune pathways. Complete regression of tumors was underpinned by late interferon-gamma-producing CD8+ cytotoxic T cells.Conclusion: The results from these models indicate that intratumoral injection of ΔGRA17 induced a systemic effect, improved mouse immune response, and sensitized immunologically ‘cold’ tumors and rendered them sensitive to immune checkpoint blockade therapy.
- Published
- 2021
4. Multi-level detection method for PCB board defects based on improved template matching and image difference
- Author
-
Wang Jian-hua, Lin Li, Zhu Han, and Chen Jian
- Subjects
Printed circuit board ,Computer science ,business.industry ,Template matching ,Computer vision ,Artificial intelligence ,business ,Atomic and Molecular Physics, and Optics ,Image (mathematics) - Published
- 2020
- Full Text
- View/download PDF
5. A High Efficacy DNA Vaccine Against Tilapia Lake Virus in Nile Tilapia (Oreochromis niloticus)
- Author
-
Yu, Nai-tong, Zeng, Wei-wei, Wang, Jian-hua, Zhang, Yu-liang, Zhang, Xiu-chun, and Liu, Zhi-xin
- Subjects
biochemistry ,human activities - Abstract
Tilapia lake virus (TiLV) is the main tilapia-infecting virus worldwide, causing serious economic losses. However, there is no vaccine for this viral disease. Here, TiLV ORF10 (TiLV-ORF10) encoding a protein with abundant epitopes was constructed into the eukaryotic expression vector pcDNA3.1, and used to evaluate the immune protective effects in Nile tilapia (Oreochromis niloticus). RT-PCR and western blot analyses confirmed vaccine plasmid expression in tilapia muscle tissues. Moreover, the transcription levels of immunoglobulin M, toll-like receptor 2, myeloid differentiation factor 88, interleukin 8, tumor necrosis factor alpha, gamma-IFN, and nuclear factor κB immune-related genes were statistically significantly upregulated in the spleen, liver, and kidney of vaccinated tilapias (P < 0.05). TiLV challenge experiments showed that relative percent survival (RPS) was significantly enhanced in fish by this DNA vaccine. Moreover, RPS was enhanced further when using a higher amount of the DNA vaccine (85.72% RPS at a DNA dose of 45 μg pcDNA3.1–ORF10). Vaccination with pcDNA3.1–ORF10 significantly reduced virus replication, as evidenced by the low amount of virus in the spleen, liver, and kidney of vaccinated tilapias after TiLV challenge. Thus, pcDNA3.1–ORF10 could induce protective immunity in tilapia and may be a potential vaccine candidate for controlling diseases caused by TiLV.
- Published
- 2021
6. Key Construction Technologies for Large River-Crossing Slurry Shield Tunnel: Case Study
- Author
-
Wang Jian-hua, Han Lei, Guan-Lin Ye, and Song Zhou
- Subjects
Mining engineering ,Mechanical Engineering ,Shield ,Urbanization ,Slurry ,Key (cryptography) ,Aerospace Engineering ,Environmental science ,General Materials Science ,Civil and Structural Engineering - Abstract
With the rapid urbanization and unprecedented development of urban traffic, there is an increasing need for river crossings with large-diameter tunnels in short spans, such as in the Yangtz...
- Published
- 2021
- Full Text
- View/download PDF
7. Additional file 7 of Plastome structure and phylogenetic relationships of Styracaceae (Ericales)
- Author
-
Cai, Xiu-Lian, Landis, Jacob B., Wang, Hong-Xin, Wang, Jian-Hua, Zhu, Zhi-Xin, and Wang, Hua-Feng
- Abstract
Additional file 7: Table S1. The results of partitionfinder models in the study.
- Published
- 2021
- Full Text
- View/download PDF
8. Additional file 6 of Plastome structure and phylogenetic relationships of Styracaceae (Ericales)
- Author
-
Cai, Xiu-Lian, Landis, Jacob B., Wang, Hong-Xin, Wang, Jian-Hua, Zhu, Zhi-Xin, and Wang, Hua-Feng
- Abstract
Additional file 6: Fig. S6. Bayesian inference (BI) and Maximum likelihood (ML) phylogram of Styracaceae based on plastome noncoding regions, with ambiguous sites excluded from analysis. The support values on the branches are bootstrap value/Bayesian posterior probability; “*”means 100%/1.0 support values. The genera of Styracaceae are indicated by different colors, which correspond to branch colors.
- Published
- 2021
- Full Text
- View/download PDF
9. Double N-step phase-shifting profilometry using color-encoded grating projection
- Author
-
杨延西 Yang Yan-xi and 王建华 Wang Jian-hua
- Subjects
Physics ,Optics ,business.industry ,Profilometer ,Grating ,Projection (set theory) ,business ,Atomic and Molecular Physics, and Optics - Published
- 2019
- Full Text
- View/download PDF
10. A novel targeted GPC3/CD3 bispecific antibody for the treatment hepatocellular carcinoma
- Author
-
Qiao-li Lang, He Qilin, Nan Huang, Xi Yang, Wang Jian-hua, Yu Lin, and Ge Liang-Peng
- Subjects
0301 basic medicine ,Cancer Research ,Bispecific antibody ,Carcinoma, Hepatocellular ,medicine.medical_treatment ,CD3 ,03 medical and health sciences ,Mice ,0302 clinical medicine ,Antigen ,Glypicans ,Mice, Inbred NOD ,Antibodies, Bispecific ,medicine ,Animals ,Humans ,Pharmacology ,biology ,Effector ,business.industry ,Liver Neoplasms ,Immunotherapy ,medicine.disease ,Chimeric antigen receptor ,030104 developmental biology ,Oncology ,030220 oncology & carcinogenesis ,Hepatocellular carcinoma ,Cancer research ,biology.protein ,Molecular Medicine ,Female ,Antibody ,business ,Research Paper - Abstract
Hepatocellular carcinoma (HCC) is the most frequent primary liver cancer but has shown limited success to date in the treatment of advanced stage. Recruitment of T cells for cancer treatment is a rapidly growing strategy in immunotherapy such as chimeric antigen receptor T cells and bispecific antibodies. However, unwanted aggregations, structural instability or short serum half-life are major challenges of bispecific antibodies. Here, we developed a new format of T cell-redirecting antibody that is bispecific for membrane proteoglycans GPC3 of HCC and the T-cell-specific antigen CD3, which demonstrated to be favorable stability and productivity. Cross-linking of T cells with GPC3 positive tumor cells by the anti-GPC3/CD3 bispecific antibody-mediated potent GPC3-dependent and concentration-dependent cytotoxicity in vitro. Administration of the bispecific antibody with different concentrations in murine xenograft models of human HCC significantly inhibited tumor growth. In addition, no effects on tumor growth were observed in the absence of human effector cells or the bispecific antibody. Taken together, the anti-GPC3/CD3 bispecific antibody might be a potential therapeutic treatment for HCC.
- Published
- 2020
11. A rigorous characteristic line theory for axisymmetric problems and its application in circular excavations
- Author
-
Wang Jian-hua and Xiong Guojun
- Subjects
010102 general mathematics ,0211 other engineering and technologies ,Rotational symmetry ,02 engineering and technology ,Mechanics ,Geotechnical Engineering and Engineering Geology ,01 natural sciences ,Potential theory ,Nonlinear system ,Drucker–Prager yield criterion ,Lateral earth pressure ,Solid mechanics ,Earth and Planetary Sciences (miscellaneous) ,Boundary value problem ,0101 mathematics ,Axial symmetry ,021101 geological & geomatics engineering ,Mathematics - Abstract
The existing approaches to solving axisymmetric active earth pressure problems by applying characteristic line theory are based on certain subjective hypotheses, and the resulting solutions for axisymmetric active earth pressure are not rigorous. In this paper, by introducing the compatibility equation in place of various hypotheses, a rigorous characteristic line theory of axial symmetry is established and applied in the calculation of axisymmetric earth pressure. The limit equilibrium equations derived are based on the limit stress components satisfying the Drucker–Prager yield criterion. The limit compatibility equation derived is based on the flow theory, the plastic potential theory and the compatibility equation. By solving the limit equilibrium equations together with the limit compatibility equation, general solutions for the characteristic line and characteristic relationship are found. By introducing boundary conditions, the axisymmetric active earth pressure is obtained, which takes into account the dilatancy angle and the radial flow velocity of the stress boundary. A comparison with existing methods and with experimental data indicates that this method is more accurate than existing methods. Finally, the earth pressure generated by weight, surcharge and cohesion is investigated and many interesting conclusions are drawn. In a shallow excavation, the earth pressure shows a nonlinear development, and it shows an almost linear development in a deep excavation. The pressure produced by weight is affected significantly by the friction angle and the dilatancy angle, and the pressure produced by surcharge and cohesion is greatly affected by the friction angle and the radial flow velocity of the free boundary.
- Published
- 2018
- Full Text
- View/download PDF
12. Probing the noncommutative effects of phase space in the time-dependent Aharonov–Bohm effect
- Author
-
Ma, Kai, Wang, Jian-Hua, and Yang, Huan-Xiong
- Subjects
Physics ,Quantum Physics ,Mathematics::Operator Algebras ,010308 nuclear & particles physics ,FOS: Physical sciences ,General Physics and Astronomy ,Gauge (firearms) ,Parameter space ,01 natural sciences ,Noncommutative geometry ,Momentum ,High Energy Physics - Phenomenology ,symbols.namesake ,High Energy Physics - Phenomenology (hep-ph) ,Phase space ,0103 physical sciences ,symbols ,Invariant (mathematics) ,Quantum Physics (quant-ph) ,010306 general physics ,Aharonov–Bohm effect ,Gauge symmetry ,Mathematical physics - Abstract
We study the noncommutative corrections on the time-dependent Aharonov-Bohm effect when both the coordinate-coordinate and momentum-momentum noncommutativities are considered. This study is motivated by the recent observation that there is no net phase shift in the time-dependent AB effect on the ordinary space, and therefore tiny derivation from zero can indicate new physics. The vanishing of the time-dependent AB phase shift on the ordinary space is preserved by the gauge and Lorentz symmetries. However, on the noncomutative phase space, while the ordinary gauge symmetry can be kept by the Seiberg-Witten map, but the Lorentz symmetry is broken. Therefore nontrivial noncommutative corrections are expected. We find there are three kinds of noncommutative corrections in general: 1) $\xi$-dependent correction which comes from the noncommutativity among momentum operators; 2) momentum-dependent correction which is rooted in the nonlocal interactions in the noncommutative extended model; 3) momentum-independent correction which emerges become of the gauge invariant condition on the nonlocal interactions in the noncommutative model. We proposed two dimensionless quantities, which are based on the distributions of the measured phase shift with respect to the external magnetic field and to the cross section enclosed by the particle trajectory, to extract the noncommutative parameters. We find that stronger (weaker) magnetic field strength can give better bounds on the coordinate-coordinate (momentum-momentum) noncommutative parameter, and large parameter space region can be explored by the time-dependent AB effect., Comment: 12pages. arXiv admin note: substantial text overlap with arXiv:1604.02110
- Published
- 2017
- Full Text
- View/download PDF
13. Comprehensive Treatment Analysis of Groundwater Over-exploitation in Guangping County
- Author
-
Chang-Qing 1,2 Xu, Tang, Yun, Wang, Jian-Hua, and Shao, Wei-Wei
- Published
- 2020
- Full Text
- View/download PDF
14. Sea Fog Detection Using U-Net Deep Learning Model Based On Modis Data
- Author
-
Sheng Hui, Zhu Chunyang, Xiao yanfang, Wang Jian-hua, and Liu Shan-wei
- Subjects
business.industry ,Deep learning ,Dimensionality reduction ,Marine layer ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Training (meteorology) ,Environmental science ,Data pre-processing ,Atmospheric model ,Artificial intelligence ,business ,Remote sensing - Abstract
Sea fog can have both negative and positive impacts on humans life. At present, remote sensing has become the main means of long-term and large-scale observation of sea fog. With the improvement of spectral resolution and increase of data volume, the traditional threshold method is simple and convenient as the main method of current sea fog detection, but it’s not flexible and accurate enough which causes people need a more automated and intelligent algorithm to achieve efficient sea fog detection. In this article, we use the U-Net deep learning model to construct the sea fog detection model for MODIS multi-spectral images. The main steps include? (1) Data preprocessing, including the PCA method for dimensionality reduction of data; (2) Manual samples extraction with CALIPSO data assist; (3) Construction and training of U-Net sea fog detection model. The experimental results show that the U-Net model can effectively and machine learning method has good potential in sea fog detection.
- Published
- 2019
- Full Text
- View/download PDF
15. WITHDRAWN: Sar Image Target Recognition Method Based On Sparse Representation Of Local Dictionary
- Author
-
Wang Jian-hua, Han Hongliang, Lu Wei, Bai Yonglei, and Feng Fan
- Subjects
Synthetic aperture radar ,Computer Networks and Communications ,Computer science ,business.industry ,fungi ,020208 electrical & electronic engineering ,Cognitive neuroscience of visual object recognition ,02 engineering and technology ,Sparse approximation ,Object (computer science) ,020202 computer hardware & architecture ,body regions ,Background noise ,Artificial Intelligence ,Hardware and Architecture ,Shadow ,0202 electrical engineering, electronic engineering, information engineering ,Clutter ,Computer vision ,Segmentation ,Artificial intelligence ,skin and connective tissue diseases ,business ,Software - Abstract
Target segments of the Synthetic Aperture Radar (SAR) images are often of SAR images used as one of the challenge the procedure of SAR target recognition interpretation. Segmentation of the object, and then be separated from the target in order to eliminate the background noise or background clutter. However, segmentation may be discarded, and the shadow of the object where the target characteristic further comprises a portion of the difference between object recognition information. Thus, the proposed automatic detection and identification of target SAR image-based approach Sparse Representation Local Dictionary. (SRLD) Using the Model to target detection and recognition experiments to get moving and stationary targets, and identify baseline data set, verify the SAR image recognition field goal deep neural networks' effectiveness.
- Published
- 2021
- Full Text
- View/download PDF
16. Kinetic studies on the cure reaction of hydroxyl-terminated polybutadiene based polyurethane with variable catalysts by differential scanning calorimetry
- Author
-
Hu Tuoping, Chai Tao, Ma Hui, Guo Jia-Hu, Yuan Junming, Wang Jian-hua, Yu Yan-Wu, Qin Ning, Liu Yu-cun, and Zhang Liang
- Subjects
Materials science ,Polymers and Plastics ,General Chemical Engineering ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Kinetic energy ,01 natural sciences ,0104 chemical sciences ,Catalysis ,Viscosity ,chemistry.chemical_compound ,Differential scanning calorimetry ,Hydroxyl-terminated polybutadiene ,chemistry ,Polymer chemistry ,Physical and Theoretical Chemistry ,0210 nano-technology ,Polyurethane - Abstract
This paper employs differential scanning calorimetry (DSC) to investigate the reactions of hydroxyl-terminated polybutadiene (HTPB) binder and isophorone isophorone diisocyanate (IPDI) with two different cure catalysts, namely, dibutyl tin dilaurate (DBTDL) and stannous octanoate (TECH). This study evaluates the effects of two cure catalysts (i.e. DBTDL and TECH) on rate constants of the polyurethane cure reactions. Throughput the study, the kinetic parameters and the curing reaction rate equations are obtained. The present work concludes that both catalysts had a catalytic effect on the HTPB-IPDI system, but that the catalytic effect of DBTDL was higher than that of TECH. The binder system with the TECH catalyst displayed a longer pot-life and lower toxicity compared with the DBTDL. Additionally, this study investigates the binder system’s viscosity build-up at 35°C and the viscosity build-up results were in agreement with the DSC analysis results.
- Published
- 2016
- Full Text
- View/download PDF
17. Additional file 1: of Independent modulation of individual genomic component transcription and a cis-acting element related to high transcriptional activity in a multipartite DNA virus
- Author
-
Nai-Tong Yu, Xie, Hui-Min, Zhang, Yu-Liang, Wang, Jian-Hua, Zhongguo Xiong, and Liu, Zhi-Xin
- Abstract
Table S1. The Ct value of BBTV each component by different concentrations of forward and reverse primers. (DOCX 16 kb)
- Published
- 2019
- Full Text
- View/download PDF
18. Additional file 2: of Independent modulation of individual genomic component transcription and a cis-acting element related to high transcriptional activity in a multipartite DNA virus
- Author
-
Nai-Tong Yu, Xie, Hui-Min, Zhang, Yu-Liang, Wang, Jian-Hua, Zhongguo Xiong, and Liu, Zhi-Xin
- Abstract
Table S2. Primers designed for BBTV genomic components. (DOCX 15 kb)
- Published
- 2019
- Full Text
- View/download PDF
19. Additional file 3: of Independent modulation of individual genomic component transcription and a cis-acting element related to high transcriptional activity in a multipartite DNA virus
- Author
-
Nai-Tong Yu, Xie, Hui-Min, Zhang, Yu-Liang, Wang, Jian-Hua, Zhongguo Xiong, and Liu, Zhi-Xin
- Abstract
Table S3. The DNA concentration of recombinant plasmids of BBTV genomic components. (DOCX 16 kb)
- Published
- 2019
- Full Text
- View/download PDF
20. Additional file 4: of Independent modulation of individual genomic component transcription and a cis-acting element related to high transcriptional activity in a multipartite DNA virus
- Author
-
Nai-Tong Yu, Xie, Hui-Min, Zhang, Yu-Liang, Wang, Jian-Hua, Zhongguo Xiong, and Liu, Zhi-Xin
- Abstract
Figure S1. Optimization of annealing temperatures for each component of BBTV. (PDF 99 kb)
- Published
- 2019
- Full Text
- View/download PDF
21. Euler–Lagrange study of bubble drag reduction in turbulent channel flow and boundary layer flow
- Author
-
Wang Jian-hua, Wan Decheng, and Zhang Xiaosong
- Subjects
Fluid Flow and Transfer Processes ,Physics ,Turbulent channel flow ,Mechanical Engineering ,Bubble ,Computational Mechanics ,Mechanics ,Condensed Matter Physics ,Boundary layer ,Euler lagrange ,Flow (mathematics) ,Mechanics of Materials ,Drag ,Reduction (mathematics) - Published
- 2020
- Full Text
- View/download PDF
22. Small Image Recognition Classification Based on Random Dropout and PSO-BP
- Author
-
Wang Jian-hua, Liao Xiao-dong, Sui Li-Yue, Tao Zhuang, and Chen Ying-Xi
- Subjects
Basis (linear algebra) ,business.industry ,Computer science ,Particle swarm optimization ,Computer vision ,Hidden layer ,Artificial intelligence ,business ,Automation ,Backpropagation ,Dropout (neural networks) ,Network model ,Network error - Abstract
W373 the development of information technology more and more rapidly, the development of image recognition classification technology is also increasingly improved. This paper proposes a method which combines random Dropout algorithm with PSO-BP to realize the recognition and classification of small images. On the basis of the error back propagation adjustment weight of the traditional BP algorithm, the weight correction of PSO algorithm is introduced, and the PSO-BP network model is established. Then the hidden layer unit of PSO-BP network is improved by using stochastic Dropout algorithm, so the fast operation speed is obtained. The results show that compared with the traditional BP and the PSO-BP algorithm, the network error rate is obviously reduced after the algorithm is improved in this paper, and the real-time performance of the algorithm is improved to a certain extent.
- Published
- 2018
- Full Text
- View/download PDF
23. 全附体ONRT船模在波浪中自航的数值模拟
- Author
-
Wang Jian-hua and Wan Decheng
- Subjects
Physics ,Applied Mathematics ,Mechanical Engineering ,0103 physical sciences ,020101 civil engineering ,02 engineering and technology ,01 natural sciences ,010305 fluids & plasmas ,0201 civil engineering - Published
- 2016
- Full Text
- View/download PDF
24. Effect of Argon Addition on Morphology and Structure of Diamond Films (from Microcrystalline to Nanocrystalline)
- Author
-
Liu Lin, Weng Jun, Wang Jian-hua, Zhang Ying, and Cui Xiaohui
- Subjects
Materials science ,Argon ,Material properties of diamond ,Analytical chemistry ,Diamond ,chemistry.chemical_element ,engineering.material ,Condensed Matter Physics ,Nanocrystalline material ,Volumetric flow rate ,symbols.namesake ,Crystallography ,Amorphous carbon ,chemistry ,engineering ,Surface roughness ,symbols ,Raman spectroscopy - Abstract
Micro-/nanocrystalline diamond films deposited in Ar/H2/CH4 microwave plasmas have been studied, with argon flow rates in the range of 70-100 sccm. The effects of argon addition on morphology, surface roughness, quality and structure were investigated by scanning electron microscopy, surface profiler, Raman spectrometer and X-ray diffraction (XRD). It is demonstrated that when the argon flow rate is 70 sccm or 75 sccm, well-faceted polycrystalline diamond films can be grown at a low substrate temperature less than 610 °C. With the increase in the argon flow rate, the smooth crystallographic planes disappear gradually. Instead, rough crystallographic planes made up of small aggregates begin to take shape, resulting from the increase in the secondary nucleation rate. Nanocrystalline diamond films were obtained at a flow rate of 100 sccm, and all of the prepared diamond films were smooth, with a surface roughness (Ra) less than 20 nm. Raman analyses reveal that the amount of amorphous carbon increases significantly with the increase in argon flow. The results of XRD show that crystalline size and preferential orientation of diamond films depend on the argon content in the plasmas.
- Published
- 2015
- Full Text
- View/download PDF
25. Performance and experiments of particle rotation driven by swirl
- Author
-
王建华 Wang Jian-hua, 青山尚之 Aoyama Hisayuki, 黄维军 Huang Wei-jun, and 张勤 Zhang Qin
- Subjects
Physics ,Particle rotation ,Mechanics ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials - Published
- 2015
- Full Text
- View/download PDF
26. Compensation capacity of low order aberration using single actuator deformable mirror
- Author
-
Cao Fen, Liu Wen-guang, Fang Yong, Liu Wen-zhi, Wang Jian-hua, and Zhang Shi-qing
- Subjects
Physics ,Optics ,business.industry ,Order (business) ,Control theory ,business ,Actuator ,Atomic and Molecular Physics, and Optics ,Deformable mirror ,Compensation (engineering) - Published
- 2015
- Full Text
- View/download PDF
27. Theoretical fast non-intrusive 3-D temperature distribution measurement within scattering medium from flame emission image analysis
- Author
-
Fei Wang Jian-hua Yan, Qunxing Huang, and Yong Chi
- Subjects
Materials science ,Scattering ,business.industry ,Inverse problem ,Combustion ,Residual ,Least squares ,Temperature measurement ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Adiabatic flame temperature ,Optics ,Radiative transfer ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,business - Abstract
A new approach to inverse radiation analysis is presented for non-intrusive 3-D flame temperature reconstruction using flame emission images from four CCD camera detectors installed on the furnace wall. The scattering from participating medium in the flame was considered by combining the discrete radiative transfer method with the discrete ordinate method. A modified minimum residual algorithm was employed to calculate the least squares solution of the ill-conditioned inverse problem. A numerical test problem simulating real temperature measurements in an industrial furnace was used to assess the performance of the proposed method. These assessments indicate that this method is capable of reconstructing 3-D temperature distributions fast and accurately, even with noisy flame emission data. Such a capability has potential in real-time temperature measurement for combustion optimization and pollution emission control.
- Published
- 2013
- Full Text
- View/download PDF
28. Effect of the Environmental Factors on Diketopiperazine Cyclo (Pro-Phe) Production and antifungal Activity of Bacillus amyloliquefaciens Q-426
- Author
-
Wang, Jian-Hua, Quan, Chun-Shan, and Delianis, Pringgenies
- Subjects
[SDV] Life Sciences [q-bio] - Published
- 2017
29. Microstructure and Properties of Ag-1.33%Mg-0.54%Ni Alloy after Severe Plastic Deformation and Internal Oxidation
- Author
-
Chen Liangwei, Kong Jianwen, Yi Jianhong, Shi Qingnan, Wang Jian-hua, and Xie Hongchao
- Subjects
Materials science ,Metallurgy ,Alloy ,General Engineering ,engineering.material ,Microstructure ,Brass ,visual_art ,Ultimate tensile strength ,visual_art.visual_art_medium ,engineering ,Texture (crystalline) ,Severe plastic deformation ,Internal oxidation ,Tensile testing - Abstract
Ag-1.33Mg-0.54Ni (at%) alloy with high strength and high electrical conductivity, was subjected to accumulative rolling with 98% thickness reduction and internal oxidation, and studied by scan electron microscope (SEM) and X-ray diffraction (XRD). Conventional mechanical properties before and after internal oxidation were evaluated. Results show that the hardness, tensile strength, tensile elongation and electrical resistivity of the alloy after internal oxidation were 1350 MPa, 450 MPa, 6% and 1.73 μΩ·cm, respectively. Further, texture studies suggest that the alloy during internal oxidation had the {110} Goss and {110} Brass textures. A few of MgO and NiO precipitates in a silver matrix hindered the growth of Ag grains and kept the orientation of Ag grains quite stable and enhanced the mechanical properties of the alloy.
- Published
- 2013
- Full Text
- View/download PDF
30. Postsurgical treatment with adjuvant transarterial chemoembolization in patients with hepatitis B-related hepatocellular carcinoma
- Author
-
Hu, Hao, Liu, Rong, Long, Xiao Ran, Han, Xi Kun, Fan, Jia, Yan, Zhi Ping, and Wang, Jian Hua
- Subjects
Adult ,Male ,Hepatitis B virus ,Carcinoma, Hepatocellular ,Liver Neoplasms ,Observational Study ,Middle Aged ,Prognosis ,Combined Modality Therapy ,Risk Assessment ,Tumor Burden ,Survival Rate ,postsurgical treatment ,Hepatitis B, Chronic ,adjuvant transarterial chemoembolization ,DNA, Viral ,hepatitis B-related hepatocellular carcinoma ,Blood Vessels ,Hepatectomy ,Humans ,Female ,Neoplasm Invasiveness ,Chemoembolization, Therapeutic ,Research Article - Abstract
This study sought to develop a reliable and easy-to-use scoring model to guide the decision to perform postsurgical adjuvant transarterial chemoembolization (PA-TACE) in patients with hepatitis B-related hepatocellular carcinoma (HCC). The study included 235 consecutive patients with hepatitis B-related HCC undergoing PA-TACE at our medical center. Patients were assigned to 2 sets according to the PA-TACE date: initial (2005–2007; n = 130) and internal validation (2008–2009; n = 105) sets. With the aid of a Cox regression model, we developed a risk-scoring model from the independent predictive factors of our initial set designed as a guide for PA-TACE, and the performance of the model was validated with an internal set. External validation was also performed with an independent dataset (n = 84) to assess the discriminatory power of the scoring model. In the multivariate analysis, 4 risk factors (an increase in Child-Pugh score of at least 1 point, hepatitis B virus deoxyribonucleic acid [HBV-DNA] level >104 IU/mL, tumor diameter ≥5 cm, and the presence of vascular invasion) were significantly associated with prognosis. These factors were incorporated into a novel clinicopathological scoring model (assessment for PA-TACE [APT] risk-scoring model) ranging from 0 to 8 that was correlated with prognosis. Different survival outcomes were identified in three groups (0–2 points, 3–6 points, and 7–8 points). The risk-scoring model was further confirmed with 2 independent sets. The novel APT risk-scoring model, merging 4 prognostic factors, may achieve an optimal postsurgical prediction of PA-TACE in HBV-related HCC. The risk for an individual patient with an APT score of ≥7.0 prior to the PA-TACE, who may not profit from further PA-TACE, can be determined, and this may lead to a more appropriate choice of treatment.
- Published
- 2016
31. A 7-Year-Old Girl with Hemoptysis for 3 Days
- Author
-
Tang Lan-Fang, Wang Jian-Hua, and Chen Jie
- Subjects
Hemoptysis ,medicine.medical_specialty ,Epinephrine ,media_common.quotation_subject ,MEDLINE ,Pulmonary Artery ,030204 cardiovascular system & hematology ,Hemostatics ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,X ray computed ,medicine ,Humans ,Abnormalities, Multiple ,Bronchopulmonary Sequestration ,Girl ,Child ,Lung ,media_common ,business.industry ,Ethamsylate ,Pulmonary Veins ,Pediatrics, Perinatology and Child Health ,Female ,Radiology ,Tomography, X-Ray Computed ,business - Published
- 2016
- Full Text
- View/download PDF
32. Apolipoprotein ε4-Allele as a Significant Risk Factor for Conversion from Mild Cognitive Impairment to Alzheimer’s disease: a Meta-analysis of Prospective Studies
- Author
-
Ma Fei and Wang Jian-hua
- Subjects
Male ,Oncology ,Gerontology ,Apolipoprotein E ,medicine.medical_specialty ,Neurology ,Genetic Heterogeneity ,Cellular and Molecular Neuroscience ,Apolipoproteins E ,Alzheimer Disease ,Risk Factors ,Internal medicine ,Epidemiology ,medicine ,Humans ,Dementia ,Cognitive Dysfunction ,Prospective Studies ,Prospective cohort study ,Alleles ,Aged ,General Medicine ,medicine.disease ,Sample size determination ,Meta-analysis ,Female ,Alzheimer's disease ,Psychology - Abstract
Recent studies of the relationship between progression from mild cognitive impairment (MCI) to Alzheimer disease (AD) and APOE e4-allele revealed inconsistent results. To estimate the risk posed by APOE e4-allele for developing AD in MCI subjects using meta-analysis and identify possible sources of heterogeneity between studies, we reviewed longitudinal epidemiological studies of the presence of APOE e4-allele on risk for progression to dementia in MCI subjects, and conducted meta-analyses of the results from these studies. Our study was derived from 315 positive-outcome events and 461 negative-outcome events from 8 prospective studies. The pooled RR was statistically significant (pooled RR = 2.09; 95 % CI, 1.52–2.88). The Q statistics indicated high heterogeneity across studies (Q = 14.21, p = 0.003). RR were significantly related to the ethnicity of the sample (z = 3.58, p = 0.024). No significant heterogeneity was observed after stratification in four European-population studies (χ 2 = 0.67, p = 0.880), but it remained in four American-population studies (χ 2 = 18.52, p = 0.003). Heterogeneity markedly reduced after excluding one specific study (Q = 4.9, p = 0.009; I 2 = 39 %). APOE e4-allele conferred increased risk for progression to dementia in MCI subjects. Ethnicity is a critical factor to yield heterogeneity. Further studies using larger sample sizes are required.
- Published
- 2012
- Full Text
- View/download PDF
33. Climate change and water resources management in Tuwei river basin of Northwest China
- Author
-
David King, Shamsuddin Shahid, Wang Xiao-jun, He Rui-min, Wang Xin-gong, Amgad Elmahdi, Liu Jin-hua, Wang Jian-hua, and Zhang Jianyun
- Subjects
Global and Planetary Change ,geography ,geography.geographical_feature_category ,Ecology ,business.industry ,Environmental resource management ,Integrated water resources management ,Drainage basin ,Water supply ,Water scarcity ,Water resources ,Water conservation ,Ecosystem management ,Environmental science ,Natural resource management ,business ,Water resource management - Abstract
Water resources are an integral part of the socio-economic-environmental system. Water resources have dynamic interactions with related social, economic and environmental elements, as well as regulatory factors that are characterized by non-linear and multi-loop feedbacks. In this paper, a complex System Dynamic (SD) model is used to study the relationship among population growth, economic development, climate change, management strategies and water resources, and identify the best management strategy to adapt with the changing environment in the Tuwei river basin of Northwest China. Three management alternatives viz. business as usual, water supply management and water demand management are studied under different climate change scenarios. Results indicate that water shortage rate in Tuwei river basin may increase up to 80 % by the year 2030 if current management practices are continued or the supply based management strategy is adopted. On the other hand, water demand management can keep the water shortage rate within a tolerable limit and therefore can be considered as the sustainable strategy for water resources management to maintain the economic growth and ecological status of the Tuwei river basin.
- Published
- 2012
- Full Text
- View/download PDF
34. Deposition and Boron Doping of Nano-Crystalline Diamond Thin Films on Poly-Crystalline Diamond Thick Films
- Author
-
Weng Jun, Liu Fan, Wang Jian-hua, Liu Pengfei, Man Weidong, and Xiong Liwei
- Subjects
Materials science ,Material properties of diamond ,Doping ,Diamond ,Nanotechnology ,Chemical vapor deposition ,engineering.material ,Condensed Matter Physics ,Surface coating ,Carbon film ,Chemical engineering ,engineering ,Thin film ,Layer (electronics) - Abstract
Boron-doped nano-crystalline diamond (NCD) thin films have been successfully deposited on well-polished poly-crystalline diamond (PCD) thick films in a microwave plasma enhanced chemical vapor deposition (MPCVD) reactor for the first time. Different surface pretreatment techniques are carried out under different gas conditions (CH4, H2, Ar, and CH4/H2) to eliminate the effect of grain boundaries on the growth of a smooth NCD intrinsic layer. Well doped NCD films have been fabricated in CH4/H2/B2H6 plasma by varying the atomic ratio of B/C and the substrate temperature. Atomic force microscopy (AFM) results show that pretreatment in pure CH4 plasma at 1000°C is most effective for NCD growth, while hydrogen containing plasma is harmful to the surface smoothness of NCD thin films. Doping research indicates that the optimum parameters for the boron-doping of high-quality NCD thin films are B/C=300 ppm (10−6) and 800°C.
- Published
- 2012
- Full Text
- View/download PDF
35. Wigner function for the Dirac oscillator in spinor space
- Author
-
Yuan Yi, Ma Kai, and Wang Jian-Hua
- Subjects
Physics ,Nuclear and High Energy Physics ,High Energy Physics::Lattice ,Astronomy and Astrophysics ,Dirac algebra ,Dirac comb ,symbols.namesake ,Dirac spinor ,Dirac equation ,Quantum mechanics ,symbols ,Two-body Dirac equations ,Wigner distribution function ,Dirac sea ,Instrumentation ,Causal fermion system - Abstract
The Wigner function for the Dirac oscillator in spinor space is studied in this paper. Firstly, since the Dirac equation is described as a matrix equation in phase space, it is necessary to define the Wigner function as a matrix function in spinor space. Secondly, the matrix form of the Wigner function is proven to support the Dirac equation. Thirdly, by solving the Dirac equation, energy levels and the Wigner function for the Dirac oscillator in spinor space are obtained.
- Published
- 2011
- Full Text
- View/download PDF
36. Effect of Gas Sources on the Deposition of Nano-Crystalline Diamond Films Prepared by Microwave Plasma Enhanced Chemical Vapor Deposition
- Author
-
Weng Jun, Wang Jian-hua, Xiong Liwei, Man Weidong, and Chen Guanhu
- Subjects
Materials science ,Silicon ,Analytical chemistry ,Diamond ,chemistry.chemical_element ,Chemical vapor deposition ,engineering.material ,Combustion chemical vapor deposition ,Condensed Matter Physics ,Surface coating ,Carbon film ,chemistry ,Plasma-enhanced chemical vapor deposition ,engineering ,Deposition (phase transition) - Abstract
Nano-crystalline diamond (NCD) films were deposited on silicon substrates by a microwave plasma enhanced chemical vapor deposition (MPCVD) reactor in C2H5OH/H2 and CH4/H2/O2 systems, respectively, with a constant ratio of carbon/hydrogen/oxygen. By means of atomic force microscopy (AFM) and X-ray diffraction (XRD), it was shown that the NCD films deposited in the C2H5OH/H2 system possesses more uniform surface than that deposited in the CH4/H2/O2 system. Results from micro-Raman spectroscopy revealed that the quality of the NCD films was different even though the plasmas in the two systems contain exactly the same proportion of elements. In order to explain this phenomenon, the bond energy of forming OH groups, energy distraction in plasma and the deposition process of NCD films were studied. The experimental results and discussion indicate that for a same ratio of carbon/hydrogen/oxygen, the C2H5OH/H2 plasma was beneficial to deposit high quality NCD films with smaller average grain size and lower surface roughness.
- Published
- 2010
- Full Text
- View/download PDF
37. Plasma Processing of Boron-Doped Nano-Crystalline Diamond Thin Film Fabricated on Poly-Crystalline Diamond Thick Film
- Author
-
Xiong Liwei, Weng Jun, Liu Chang-lin, Liu Fan, Wang Jian-hua, and Man Weidong
- Subjects
inorganic chemicals ,Materials science ,Dopant ,Scanning electron microscope ,technology, industry, and agriculture ,Analytical chemistry ,Diamond ,Chemical vapor deposition ,engineering.material ,Condensed Matter Physics ,eye diseases ,Ion source ,Carbon film ,engineering ,sense organs ,Thin film ,Plasma processing - Abstract
Plasma treatments of boron-doped nano-crystalline diamond (NCD) thin films were carried out in order to improve their electrical properties of the films. Boron-doped NCD thin films were fabricated on well polished poly-crystalline diamond (PCD) thick films in a microwave plasma enhanced chemical vapor deposition (MPCVD) reactor, then they were processed in methane, argon, hydrogen and B2H6 (0.1% diluted by H2) plasmas, respectively. Scanning electron microscopy (SEM) and atomic force microscope (AFM) results show that the surface morphology changed little during the 10 min treatment. Secondary ion mass spectroscopy (SIMS) results indicate that B2H6 plasma was efficient for increasing boron concentration in NCD films, while the carrier analyses demonstrates that CH4 plasma processing was effective to activate the dopants and resulted in good electrical properties.
- Published
- 2010
- Full Text
- View/download PDF
38. Preparation of Nano-Crystalline Diamond Films on Poly-Crystalline Diamond Thick Films by Microwave Plasma Enhanced Chemical Vapor Deposition
- Author
-
Weng Jun, Wang Jian-hua, Man Weidong, Liu Chang-lin, and Xiong Liwei
- Subjects
Materials science ,chemistry.chemical_element ,Diamond ,Nanotechnology ,Substrate (electronics) ,Chemical vapor deposition ,engineering.material ,Condensed Matter Physics ,Pulsed laser deposition ,Surface coating ,Carbon film ,chemistry ,engineering ,Deposition (phase transition) ,Composite material ,Carbon - Abstract
Nano-crystalline diamond (NCD) films were prepared on poly-crystalline diamond (PCD) thick films by the microwave plasma enhanced chemical vapor deposition (MPCVD) method. Free standing PCD thick film (50 mm in diameter) with a thickness of 413 μm was deposited in CH4/H2 plasma. It was then abraded for 2 hours and finally cut into pieces in a size of 10 × 10 mm2 by pulse laser. NCD films were deposited on the thick film substrates by introducing a micro-crystalline diamond (MCD) interlayer. Results showed that a higher carbon concentration (5%) and a lower substrate temperature (650°C) were feasible to obtain a highly smooth interlayer, and the appropriate addition of oxygen (2%) into the gas mixture was conducive to obtaining a smooth nano-crystalline diamond film with a tiny grain size.
- Published
- 2010
- Full Text
- View/download PDF
39. Spin-1/2 relativistic particle in a magnetic field in NC phase space
- Author
-
Yuan Yi, Li Kang, Chen Chi-Yi, and Wang Jian-Hua
- Subjects
Physics ,Nuclear and High Energy Physics ,Astronomy and Astrophysics ,Space (mathematics) ,Noncommutative geometry ,Relativistic particle ,Magnetic field ,symbols.namesake ,Phase space ,Quantum mechanics ,Quantum electrodynamics ,Dirac equation ,symbols ,Instrumentation ,Commutative property ,Spin-½ - Abstract
This work provides an accurate study of the spin-1/2 relativistic particle in a magnetic field in NC phase space. By detailed calculation we find that the Dirac equation of the relativistic particle in a magnetic field in noncommutative space has similar behaviour to what happens in the Landau problem in commutative space even if an exact map does not exist. By solving the Dirac equation in NC phase space, we not only obtain the energy level of the spin-1/2 relativistic particle in a magnetic field in NC phase space but also explicitly offer some additional terms related to the momentum-momentum non-commutativity.
- Published
- 2010
- Full Text
- View/download PDF
40. Study of Properties in Superconducting Nanowires
- Author
-
Zhang Zhi-Gang, Wang Jian-Hua, and Liang Fang-Ying
- Subjects
Superconductivity ,Materials science ,Physics and Astronomy (miscellaneous) ,Condensed matter physics ,Condensed Matter::Superconductivity ,Thermal ,Nanowire ,Biasing ,Superconducting magnetic energy storage ,Superconducting quantum computing ,Quantum ,Quantum fluctuation - Abstract
We consider a simple approach of standard Ginzburg–Landau free-energy functional for a wire to study the properties of superconducting nanowires, and analyze the problem of quantum and thermally activated phase slips. In such systems one can consider a possibility for phase slips to be created not only due to thermal but also due to quantum fluctuations of a superconducting order parameter. We obtain some expressions of the free energy, the entropy, the specific heat and the bias current, respectively. The bias current I is a function of the temperature and the length of superconducting nanowires, and has a quantum phase slip. We obtain the stochastic dynamics of superconductive-resistive switching in hysteretic current-biased superconducting nanowires undergoing phase-slip fluctuations, and obtain the distribution of switching currents. Our results can be verified in modern experiments with superconducting nanowires.
- Published
- 2010
- Full Text
- View/download PDF
41. Klein-Gordon oscillators in noncommutative phase space
- Author
-
Wang Jian-Hua, Li Kang, and Dulat Sayipjamal
- Subjects
Physics ,Nuclear and High Energy Physics ,Astronomy and Astrophysics ,Space (mathematics) ,Noncommutative geometry ,Magnetic field ,symbols.namesake ,Nonlinear Sciences::Exactly Solvable and Integrable Systems ,Phase space ,Quantum mechanics ,symbols ,Nonlinear Sciences::Pattern Formation and Solitons ,Instrumentation ,Commutative property ,Klein–Gordon equation ,Energy (signal processing) ,Mathematical physics - Abstract
We study the Klein-Gordon oscillators in non-commutative (NC) phase space. We find that the Klein-Gordon oscillators in NC space and NC phase-space have a similar behaviour to the dynamics of a particle in commutative space moving in a uniform magnetic field. By solving the Klein-Gordon equation in NC phase space, we obtain the energy levels of the Klein-Gordon oscillators, where the additional terms related to the space-space and momentum-momentum non-commutativity are given explicitly.
- Published
- 2008
- Full Text
- View/download PDF
42. The He–McKellar–Wilkens effect for spin-1 particles on non-commutative space
- Author
-
Wang Jian-Hua, Li Kang, and Sayipjamal Dulat
- Subjects
Physics ,Star product ,Phase (matter) ,Quantum mechanics ,General Physics and Astronomy ,Space (mathematics) ,Neutral particle ,Commutative property ,Spin-½ - Abstract
By using star product method, the He—McKellar–Wilkens (HMW) effect for spin-one neutral particle on non-commutative (NC) space is studied. After solving the Kemmer-like equations on NC space, we obtain the topological HMW phase on NC space where the additional terms related to the space–space non-commutativity are given explicitly.
- Published
- 2008
- Full Text
- View/download PDF
43. Analysis of the landscape change at River Basin scale based on SPOT and TM fusion remote sensing images: a case study of the Weigou River Basin on the Chinese Loess Plateau
- Author
-
Liu Li-chen, Pan Jinghu, Wang Jian-hua, Shi Jin, and Dong Xiao-feng
- Subjects
geography ,Landscape change ,geography.geographical_feature_category ,Drainage basin ,General Earth and Planetary Sciences ,Species evenness ,Dominance (ecology) ,Common spatial pattern ,Ecosystem ,Loess plateau ,Geology ,Grassland ,Remote sensing - Abstract
Eco-environmental changes which generally manifest as the ecological landscape changes are mainly affected by natural and human factors. Through complex interaction, natural factors and human activities alter the landscape structure and decide the service function of regional ecosystem. With the development of geographical information system (GIS) and satellite remote sensing (RS) techniques, the researches on quantitative analysis of landscape changes have made great strides forward. In this paper, the landscape change dynamics in the Weigou River basin have been investigated by the combined use of high-resolution RS images and GIS techniques. The objectives are to determine the landscape transition rates among landscape types and to quantify changes of various landscape indexes using FRAGSTATS, one of the spatial pattern analysis programs for categorical maps. Under man–machine interactive interpretation method, all of the 10-m resolution SPOT + TM images are classified into six primary types (farmland, forest, grassland, water, construction area and desert) and 12 sub-types based on the interpretation key which was established based on 1947 filed pictures in the Weigou River basin. A field check on the data accuracy shows that the total interpretation accuracy approaches 97.53%. Significant land-use change has taken place in the Weigou River basin over the six years from 1998 to 2004 due to rehabilitation measures. The results show that there has been a notable decrease in farmland mainly due to conversion to forest and grassland, the landscape heterogeneity and evenness has increased, and there is a greater connectivity. The dominance of farmland patch has decreased. And hence the ecological environment has started to develop in a reversing direction. The study of the integration of high-resolution RS images and GIS technique is an effective approach to analyze the landscape changes at river basin scale.
- Published
- 2007
- Full Text
- View/download PDF
44. Classification method for data stream based on concept drift detection technique
- Author
-
Wang Jian-hua, Gao Weiwei, and Li Xiaofeng
- Subjects
Data stream ,Concept drift ,business.industry ,Computer science ,Pooling ,computer.software_genre ,Data modeling ,ComputingMethodologies_PATTERNRECOGNITION ,Data visualization ,Object-oriented modeling ,Classification methods ,sort ,Data mining ,business ,computer - Abstract
This paper proposes a new classification method for data stream based on the combination concept drift detection and classification model. The proposed method includes a pooling mechanism, which stores classifiers corresponding to different concepts to ensure that the classification model will not do re-training when those concepts which appeared previously are present again, so as to directly sort out the appropriate classifiers from the pool to classification. At last, it overviews different concepts and finds out the transition relationships among them and visualizes them.
- Published
- 2015
- Full Text
- View/download PDF
45. Research on ranking recommendation algorithm of multi-B2C behavior
- Author
-
Li Xiaofeng, Wang Jian-hua, and Li Fang
- Subjects
Prediction algorithms ,Information retrieval ,Cold start ,business.industry ,Computer science ,Algorithm design ,Resource management ,The Internet ,business ,Algorithm ,Information science ,Ranking (information retrieval) - Abstract
Although personalized recommendation technology has been widely used in the Internet, there are still some problems which should be solved, such as data sparseness problem, “cold start” problem. The paper proposes a multi-B2C crossing ranking recommendation algorithm. According to the new user “cold start” problem, the paper proposes different categories of electronic commerce website access multi-B2C behavior information recommendation. Experiments show that the algorithm is accurate and personalized recommendation.
- Published
- 2015
- Full Text
- View/download PDF
46. Optical Characterization of Diamond Synthesis Using CH3OH-H2Gas Mixtures
- Author
-
Man Wei-dong, Li Lei, Wang Jian-hua, Bai Yuming, and Zhang Bao-hua
- Subjects
Materials science ,Nucleation ,Analytical chemistry ,Diamond ,chemistry.chemical_element ,Infrared spectroscopy ,Chemical vapor deposition ,engineering.material ,Condensed Matter Physics ,Carbon film ,chemistry ,engineering ,Transmittance ,Deposition (phase transition) ,Carbon - Abstract
Diamond films with high infrared transmittance have been successfully deposited using CH3OH-H2 gas mixtures through microwave plasma enhanced chemical vapor deposition (MWCVD). The primary purpose of this study is to determine the effect of the deposition conditions on the optical properties of MWCVD diamond films using CH3OH-H2 gas mixtures. Room temperature optical properties of freestanding diamond films were studied by Fourier transform IR spectroscopy. Experimental results indicated that under appropriate deposition temperature (620 °C) and methanol concentration (5.7%), the refractive index of CVD diamond films (2.33) was comparable with that of natural diamond (2.417). The average infrared transmittance was above 65% in the middle infrared region (500 cm-1-4000 cm-1), approaching to the theoretical value of diamond (71.4%). The mechanism of growing high IR transmittance diamond films by utilizing CH3OH-H2 gas system is that the high methanol concentration used in this study makes the surface roughness of diamond films decreased by increasing the secondary nucleation density and the high O/C ratio in CH3OH-H2 gas system, improved the quality of diamond films and therefore decreased the absorption of non-diamond carbon in the films.
- Published
- 2005
- Full Text
- View/download PDF
47. Analysis of the localization of damage and the complete stress-strain relation for mesoscopic heterogeneous rock under uniaxial tensile loading
- Author
-
Wang Jian-hua, Zhang Yong-xing, Zhou Xiao-ping, and Ha Qiu-ling
- Subjects
Materials science ,Applied Mathematics ,Mechanical Engineering ,Constitutive equation ,Linear elasticity ,Stress–strain curve ,Micromechanics ,Probability density function ,Mechanics ,Physics::Geophysics ,Brittleness ,Mechanics of Materials ,Hardening (metallurgy) ,Weibull distribution - Abstract
The mechanical behavior of rock under uniaxial tensile loading is different from that of rock under compressive loads. A micromechanics-based model was proposed for mesoscopic heterogeneous brittle rock undergoing irreversible changes of their microscopic structures due to microcrack growth. The complete stress-strain relation including linear elasticity, nonlinear hardening, rapid stress drop and strain softening was obtained. The influence of all microcracks with different sizes and orientations were introduced into the constitutive relation by using the probability density function describing the distribution of orientations and the probability density function describing the distribution of sizes. The influence of Weibull distribution describing the distribution of orientations and Rayleigh function describing the distribution of sizes on the constitutive relation were researched. Theoretical predictions have shown to be consistent with the experimental results.
- Published
- 2004
- Full Text
- View/download PDF
48. Analysis of the localization of damage and the complete stress-strain relation for mesoscopic heterogeneous brittle rock subjected to compressive loads
- Author
-
Ha Qiu-ling, Zhang Yong-xing, Wang Jian-hua, and Zhou Xiao-ping
- Subjects
Mesoscopic physics ,Materials science ,Applied Mathematics ,Mechanical Engineering ,Linear elasticity ,Stress–strain curve ,Micromechanics ,Physics::Geophysics ,Strain softening ,Condensed Matter::Materials Science ,Nonlinear system ,Brittleness ,Mechanics of Materials ,Hardening (metallurgy) ,Composite material - Abstract
A micromechanics-based model is established. The model takes the interaction among sliding cracks into account, and it is able to quantify the effect of various parameters on the localization condition of damage and deformation for brittle rock subjected to compressive loads. The closed-form explicit expression for the complete stress-strain relation of rock containing microcracks subjected to compressive loads was obtained. It is showed that the complete stress-strain relation includes linear elasticity, nonlinear hardening, rapid stress drop and strain softening. The behavior of rapid stress drop and strain softening is due to localization of deformation and damage. Theoretical predictions have shown to be consistent with the experimental results.
- Published
- 2004
- Full Text
- View/download PDF
49. Preparation and Electrochemical Performance of Ordered Mesoporous Si/C Composite for Anode Material
- Author
-
WANG Jian-Hua, HUANG Rui-An, GUO Yu-Zhong, CHENG Zhi-Ning, and WANG Jing
- Subjects
Inorganic Chemistry ,General Materials Science - Published
- 2018
- Full Text
- View/download PDF
50. Study of the energy response of high pressure ionization chamber for high energy gamma-ray
- Author
-
Liu Shu-Dong, Wang Jian-hua, Hua Zheng-Dong, Xu Xun-Jiang, and Li Jianping
- Subjects
Physics ,Nuclear and High Energy Physics ,High energy ,Physics::Instrumentation and Detectors ,Astrophysics::High Energy Astrophysical Phenomena ,Monte Carlo method ,Gamma ray ,Astronomy and Astrophysics ,Argon gas ,High pressure ,Ionization chamber ,Calibration ,Atomic physics ,Instrumentation ,Energy (signal processing) - Abstract
The energy response calibration of the commonly used high pressure ionization chamber is very difficult to obtain when the gamma-ray energy is more than 3 MeV. In order to get the calibration of the higher part of the high pressure ionization chamber, we use the Fluka Monte Carlo program to perform the energy response in both the spherical and the cylindrical high pressure ionization chamber which are full of argon gas. The results compared with prior study when the gamma-ray energy is less than 1.25 MeV. Our result of Monte Carlo calculation shows agreement with those obtained by measurement within the uncertainty of the respective methods. The calculation of this study is significant for the high pressure ionization chamber to measure the high energy gamma-ray.
- Published
- 2008
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.