35 results on '"Liao, Feng"'
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2. Corrosion protection of photocured coatings containing highly crosslinked SU-8 epoxy resin
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Liao, Feng-Qi, Liu, Yiting, Yeh, Yue-Zhi, and Chen, Yung-Chung
- Abstract
Graphical abstract:
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- 2024
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3. Correlation analysis of upper airway morphology in patients with obstructive sleep apnea and anatomically small retruded mandibles.
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Liao, Feng-Chun, Zhang, Tao, Huang, Xuan-Ping, Sangwatanakul, Jirayus, Li, Hong-Yi, and Zhou, Nuo
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SLEEP apnea syndromes ,HYOID bone ,MANDIBLE ,AIRWAY (Anatomy) ,STATISTICAL correlation ,MANDIBULAR fractures - Abstract
To investigate the relationship between upper airway morphology and the severity of obstructive sleep apnea (OSA) in patients with anatomically small retruded mandibles. Fifty-two patients with small retruded mandibles underwent polysomnography and airway computed tomography. The airway morphology parameters and sleep assessment were compared between the patients with or without OSA. Twenty-eight patients diagnosed with OSA, according to polysomnography, had a higher distance between the hyoid bone and mandibular plane (HMP), lateral dimension (LAT)/anteroposterior dimension (AP), but lower minimum cross-sectional area (mCSA), AP, surface area, volume, avgCSA, and airway uniformity (U). The apnea-hypopnea index had negative correlations with mCSA, AP, surface area, volume, avgCSA, and U, and had a positive correlation with HMP and LAT/AP. OSA is common among patients with small retruded mandibles and is associated with a more compressed upper airway shape and longer HMP. [ABSTRACT FROM AUTHOR]
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- 2023
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4. Correlation analysis of upper airway morphology in patients with obstructive sleep apnea and anatomically small retruded mandibles
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Liao, Feng-Chun, Zhang, Tao, Huang, Xuan-Ping, Sangwatanakul, Jirayus, Li, Hong-Yi, and Zhou, Nuo
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ABSTRACTObjectiveTo investigate the relationship between upper airway morphology and the severity of obstructive sleep apnea (OSA) in patients with anatomically small retruded mandibles.MethodsFifty-two patients with small retruded mandibles underwent polysomnography and airway computed tomography. The airway morphology parameters and sleep assessment were compared between the patients with or without OSA.ResultsTwenty-eight patients diagnosed with OSA, according to polysomnography, had a higher distance between the hyoid bone and mandibular plane (HMP), lateral dimension (LAT)/anteroposterior dimension (AP), but lower minimum cross-sectional area (mCSA), AP, surface area, volume, avgCSA, and airway uniformity (U). The apnea-hypopnea index had negative correlations with mCSA, AP, surface area, volume, avgCSA, and U, and had a positive correlation with HMP and LAT/AP.ConclusionOSA is common among patients with small retruded mandibles and is associated with a more compressed upper airway shape and longer HMP.
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- 2023
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5. Research on redundant transmission method of distribution network protection data based on device direct connection
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Lei, Tao, Ou, Weichao, Chen, Jinrong, Liao, Feng, and Wang, Yueqiang
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- 2023
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6. Diagnostic Accuracy of Prenatal Fetal Ultrasound to Detect Cleft Palate in High‐Risk Fetuses
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Lai, Guang‐ping, Weng, Xun‐jin, Wang, Min, Tao, Zhao‐feng, and Liao, Feng‐hua
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This systematic review and meta‐analysis investigated the accuracy of prenatal fetal ultrasound (US) to detect cleft palate during the second and third trimester (12–36 weeks) of pregnancy in high‐risk fetuses. Pubmed and Embase databases were searched for studies that performed prenatal fetal US (comparator) and postnatal examination (reference standard) in fetuses at high risk for orofacial clefts. Risk of bias among included studies was assessed using the QUADAS‐2. Area under the summary receiver operating characteristic (SROC) curve and pooled sensitivity and specificity were calculated. This meta‐analysis included 7 studies involving 663 high‐risk fetuses. The individual studies showed that prenatal fetal US accurately predicted the possibility of cleft palate in these fetuses. Pooled sensitivity was 87% (95% CI 71%–95%), pooled specificity was 98% (95%CI 90%–100%), and the area under the SROC curve was 0.98 (95% CI 0.97–0.99). Second and third trimester fetal US has excellent sensitivity and specificity for the detection of cleft palate in high‐risk pregnancies. Access the CME test hereand search by article title.
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- 2022
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7. Flexible Multicavity SERS Substrate Based on Ag Nanoparticle-Decorated Aluminum Hydrous Oxide Nanoflake Array for Highly Sensitive In SituDetection
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Li, Jiapu, Feng, Yuan, Liang, Li, Liao, Feng, Huang, Wanxia, Li, Kuanguo, Cui, Guanglei, and Zuo, Zewen
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Flexible surface-enhanced Raman scattering (SERS) substrates are very promising to meet the needs for real-time and on-field detection in practical applications. However, high-performance flexible SERS substrates often suffer from complexity and high cost in fabrication, limiting their widespread applications. Herein, we developed a facile method to fabricate a flexible multicavity SERS substrate composed of a silver nanoparticle (AgNP)-decorated aluminum hydrous oxide nanoflake array (NFA) grown on a polydimethylsiloxane (PDMS) membrane. Strong plasmon couplings promoted by multiple nanocavities afford high-density hotspots within such a flexible AgNPs@NFA/PDMS film, boosting high SERS sensitivity with an enhancement factor (EF) of ∼1.54 × 109, and a limit of detection (LOD) of ∼7.4 × 10–13M for rhodamine 6G (R6G) molecules. Furthermore, benefiting from the high sensitivity, high mechanical stability, and transparency of this substrate, in situSERS detections of trace thiram and crystal violet (CV) molecules on the surface of cherry tomatoes and fish have been realized, with LODs much lower than the maximum allowable limit in food, demonstrating the great potential of such a flexible substrate in food safety monitoring. More importantly, the preparation processes are very simple and environmentally friendly, and the techniques involved are completely compatible with well-established silicon device technologies. Therefore, large-area fabrication with low cost can be readily realized, enabling the extensive applications of SERS sensors in daily life.
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- 2024
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8. Prevalence of HIV-1 Drug Resistance among Patients with Antiretroviral Therapy Failure in Sichuan, China, 2010-2016.
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Ke Dong, Li Ye, Yun Leng, Shu Liang, Liao Feng, Hong Yang, Ling Su, Yiping Li, Saira Baloch, Fangting He, Dan Yuan, and Xiaofang Pei
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Antiretroviral therapy (ART) has been introduced recently and has significantly impacted morbidity and mortality, but can also engender drug resistance. To identify the prevalence of HIV-1 drug resistance (HIVDR) among patients with antiretroviral therapy failure in Sichuan during the period from 2010 to 2016, we carried out a longitudinal study in Sichuan, a province with the highest HIV/AIDS prevalence in China. The data and blood samples were collected from HIV/AIDS patients who received ART for more than half a year. Overall 5,512 sequences were completed from 7,059 ART-failure patients, and 2,499 individuals were identified as drug resistant. Among those with HIVDR mutations identified, 25.37% were against non-nucleoside reverse transcriptase inhibitors (NNRTIs), and 1.60% was against nucleoside reverse transcriptase inhibitors (NRTIs). NRTI-resistant drugs were mainly lamivudine (3TC) (57.77%) and emtricitabine (FTC), while NNRTI-resistant drugs were mainly nevirapine (NVP) (91.13%) and efavirenz (EFV) (72.81%). The most common recombination subtypes of HIV-1 in sequenced samples were CRF07_ BC (circulating recombinant form, CRF) (41.42%), followed by CRF01_AE (40.77%). Moreover, drug resistance rate increased with the prolongation of treatment time (X² = 14.758, P < 0.05). The overall prevalence of acquired drug resistance in HIV-1 infected patients in Sichuan was 5.47%, which has remained relatively stable from 2010 to 2016. HIV-1 CRF01_AE and CRF07_BC subtypes were the main epidemic strains, and the possibility of resistance was higher in CRF01_AE subtypes. The current study highlights the importance of acquired drug resistance surveillance over a long period. [ABSTRACT FROM AUTHOR]
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- 2019
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9. Impact of Moderate to Severe Chronic Kidney Disease for Long Term Survival of Implantable Cardioverter Defibrillator Patients in Taiwan.
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Liao, Feng-Ching, Hsiao, Chia-Ying, Chao, Chuan-Lei, Cheng, Chun-Han, Wu, Meng-Ruey, Su, Min-I., Chen, Chun-Yen, and Wang, Kung-Te
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Summary Background The influence of renal impairment on long-term mortality in Taiwanese patients with an ICD was uncertain. The aim of our study was to examine the impact of moderate to severe CKD on outcome in patients with ICD implantation for secondary prevention in Taiwan. Methods From 2005 to 2013, patients who underwent ICD implantation who were survivors of sudden cardiac arrest or unstable hemodynamics due to ventricular arrhythmia at a single medical center were included in this registry. We divided the patients into two groups, group 1 with estimated glomerular filtration rates (eGFRs) of ≥60 mL/(min⋅1.73 cm 2 ) and group 2 with eGFRs of <60 mL/(min⋅1.73 cm 2 ). The clinical end point was defined as the occurrence of all-cause mortality during the follow-up. Results 84 consecutive patients were enrolled in this registry. The mean age of the patients was 62.7 ± 13.2 years, and 54.8% were male. The patients of group 2 were older (mean age: 66.4 vs. 56.2 years) and had worse renal function (42 ± 12.3 vs. 89.0 ± 18.5 mL/(min⋅1.73 cm 2 )). They more often had hypertension (56.5% vs. 31.6%), diabetes mellitus (52.2% vs. 15.8%), and previous hospitalization for congestive heart failure as comorbidity (71.7% vs. 28.9%). During the mean follow-up duration of 952 days, 19 patients (22.6%) died. After adjustment for the parameters, eGFRs <60 mL/(min⋅1.73 cm 2 ) was an independent predictor of all-cause mortality (AHR:6.21, 95%CI:1.28–30.06, P = 0.02). Conclusion Moderate to severe CKD is independently associated with increased mortality in Taiwanese patients who underwent ICD implantation for secondary prevention. [ABSTRACT FROM AUTHOR]
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- 2018
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10. 58‐2: Low power and Narrow border 8K Notebook Display with Smart View
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Zhang, Hui, Im, Yunsik, Liu, Liwei, Gu, Honggang, Mei, Hongge, Liao, Feng, Chen, Xiaochuan, and Jun, Jungmok
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A 13.3‐in. 8K Oxide TFT‐LCD with Smart View driving was reported in this paper. Based on the high performance of Oxide TFT and advanced design rule, the transmittance could be improved 8% compared to traditional type. By Smart View driving, the logical power could be saved 20% on the 4K resolution compared with the 8K mode. The total power of 13.3‐in. 8K TFT‐LCD could be lower to 2.3W by Oxide technology. Meanwhile, the panel border could be reduced to 2.5mm because of the small TFT design.
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- 2019
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11. Chinese herbal medicine adjunct therapy in patients with acute relapse of multiple sclerosis: A systematic review and meta-analysis.
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Song, Liang, Zhou, Qi-hui, Wang, Hui-lin, Liao, Feng-jiao, Hua, Liang, Zhang, Hong-feng, Huang, Li-bo, Lin, Yan, and Zheng, Guo-qing
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Background: Many patients with multiple sclerosis (MS) resort to complementary and alternative medicine, which is used in 33%-80% of MS patients in the developed country. The purpose of this study is to assess the efficacy and safety of Chinese herbal medicine (CHM) as an adjunct therapy of patients with acute relapse of MS.Methods: Six databases were searched for randomized-controlled trial of CHM for acute relapse of MS. The risk of bias was assessed by using the twelve criteria recommended by the Cochrane Back Review Group. The primary outcome measures of interest are the Expanded Disability Status Score, annual relapse frequency, annual relapse rate, and annual relapse interval. The secondary outcome measures are the clinical efficacy rate and adverse events. The selection criteria of high-frequency herbs for MS are those with cumulative frequency over 50%. We analyzed the data using Review Manager (version 5.3).Results: A total of 1100 participants were included in the 20 studies from 2004 to 2015. The number of risk of bias which met the criteria varied from 5/12 to 7/12. The top 5 most frequently used herbs are ordinally Radix Angelicae Sinensis, Radix Glycyrrhizae, Radix Paeoniae Rubra, Radix Rehmanniae Preparata, and Bombyx Batryticatus. The meta-analysis showed a significant effect of CHM for improving Expanded Disability Status Score (P<0.01), annual relapse frequency (P<0.01) and the total clinical efficacy rate (P<0.01) compared with western conventional treatment. In analysis of annual relapse rate and annual relapse interval, there was a significant difference between CHMs and western conventional treatment (P<0.01). Adverse effects were monitored in 6 studies, and were well tolerated in all MS patients.Conclusions: The available evidence from present study supported but limited to recommend the routine use of CHM adjuvant therapy for MS because of the poor methodological quality and clinical heterogeneity. However, we identified an area that is worthy of further study. Furthermore, we selected high frequent use of CHMs as a promising candidate for further clinical application and MS trials. Further rigorous randomized-controlled trials are needed. [ABSTRACT FROM AUTHOR]- Published
- 2017
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12. Electrospun polymer bottle microresonators for stretchable single-mode lasing devices
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Ubaid, Saima, Liao, Feng, Linghu, Shuangyi, Yu, Jiaxin, and Gu, Fuxing
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We report a simple electrospinning method to fabricate polymer bottle microresonators, which are doped with a lasing gain material and supported by electrospun polymer micro/nanofibers on a flexible grooved polymer substrate. The fabricated bottle microresonators have smooth outer surfaces and high quality. By using an interference light pump approach, single whispering gallery mode lasing is obtained, with a side-mode suppression factor over 20 dB. By mechanically stretching the grooved substrate, tunability of the lasing peaks is demonstrated. Our method has the advantages of saving time and being low in cost and may have promising applications in stretchable lasing and sensing devices.
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- 2018
13. P‐1: A New Method of Verificating Charging Compensation in 8K4K 120Hz Large LCDs by Using Small Panel
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Shang, Guangliang, Dong, Xue, Liao, Feng, Chu, Yifang, Zheng, Haoliang, Han, Seungwoo, Im, Yunsik, Chen, Xiaochuan, Huang, Yinglong, and Jun, Jungmok
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Charging compensation needs to be verified in 75inch oxide 8K4K 120Hz TV panel because pixel charging time is only 1.85us. To faster and cost less, a new method using 3.42inch panel to simulation 5 key positions is proposed. The charging ratio uniformity increases from 85% to 99% along data line direction.
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- 2018
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14. Hematopoietic stem cell-derived exosomes promote hematopoietic differentiation of mouse embryonic stem cells in vitro via inhibiting the miR126/Notch1 pathway
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Liao, Feng-ling, Tan, Lin, Liu, Hua, Wang, Jin-ju, Ma, Xiao-tang, Zhao, Bin, Chen, Yanfang, Bihl, Ji, Yang, Yi, and Chen, Ri-ling
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Cell-derived exosomes (EXs) can modulate target cell differentiation via microRNAs (miRs) that they carried. Previous studies have shown that miR126 is highly expressed in hematopoietic stem cells (HSCs) and plays a role in hematopoiesis via modulating the Notch pathway that participates in progenitors' cell fate decisions. In this study we investigated whether HSC-derived EXs (HSC-EXs) could affect the differentiation of mouse embryonic stem cells (ESCs) into HSCs. We prepared HSC-EXscon, HSC-EXsscand HSC-EXsmiR126from control HSCs and the HSCs transfected with scramble control or miR126 mimics, respectively. HSC-EXs were isolated by ultracentrifugation and analyzed using nanoparticle tracking analysis. We incubated the collected EXs with mouse ESCs over a 10-d differentiation induction period, during which HSC-EXs and a Notch pathway activator (Jagged1, 100 ng/mL) were added to the cultures every 3 d. After the 10-d differentiation period, the expression levels of miR126, SSEA1, CD117, Sca1, Notch1 and Hes1 in ESCs were assessed. The generated HSCs were validated by flow cytometry using antibodies against HSC markers (CD117, CD34 and Sca1). Our results revealed that: (1) transfection with miR126 mimics significantly increased miR126 levels in HSC-EXsmiR126. (2) HSC-EX co-culture promoted mouse ESCs differentiation into HSCs with the most prominent effect found in the HSC-EXsmiR126co-culture. (3) HSC differentiation was verified by reduced SSEA1 expression and increased CD117 and Sca1 expression. (4) All the effects caused by HSC-EXs were accompanied by significant reduction of Notch1 and Hes1 expression, thus inhibition of the Notch1/Hes1 pathway, whereas activation of Notch by Jagged1 abolished the effects of HSC-EXsmiR126. In conclusion, HSC-EXs promote hematopoietic differentiation of mouse ESCs in vitro by inhibiting the miR126/Notch1 pathway.
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- 2018
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15. Analysis of Back-Contact Interface Recombination in Thin-Film Solar Cells
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Paul, Sanjoy, Grover, Sachit, Repins, Ingrid L., Keyes, Brian M., Contreras, Miguel A., Ramanathan, Kannan, Noufi, Rommel, Zhao, Zhibo, Liao, Feng, and Li, Jian V.
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The open-circuit voltage (VOC) in a generic TCO/buffer/absorber/back-contact thin-film solar cell device is a key parameter in the recombination analysis. In particular, VOC is sensitively influenced by the interface recombination at the buffer/absorber front interface and at the absorber/back-contact interface. This paper reports the temperature, excitation light intensity, and wavelength-dependent open-circuit voltage analysis to separate and quantify recombination rates in solar cells at the front and back interfaces, in the depletion regions, and in the quasi-neutral region. The wavelength-dependent VOC analysis is exploited to extract the absorber/back-contact recombination coefficient. The experimentally observed results are verified using SCAPS-1D (one dimensional-a solar cell capacitance simulator) simulation.
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- 2018
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16. Experimental investigation on pores and permeability variation characteristics of coal treated by chemical solvents
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Zheng, Chunshan, Liao, Feng, Xue, Sheng, Jiang, Bingyou, Gong, Xuanping, Han, Baiqing, and Chen, Zhongwei
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Enhancing coal permeability by adopting chemical solvents treatment is one of the most effective methods to improve coalbed methane production efficiency in deep coal reservoirs with low permeability. However, coal pores and permeability variation characteristics affected by chemical solvents is not quantitatively determined. In this study, after being treated with carbon disulfide (CS2), acetone (C3H6O) and N-methyl pyrrolidone (NMP), changes in coal ultrasonic characteristics were investigated. Relationship between ultrasonic parameter variations and coal fracture development was revealed. Meanwhile, through adopting nuclear magnetic resonance (NMR) and permeability testing equipment, coal pore structure, porosity and permeability changes were studied. Results show that after treated by three chemical solvents, ultrasonic velocity in coal reduces by 7.7%–51.2%, while ultrasonic attenuation coefficient increases by 4.22dB/m-123.8 dB/m, indicating that coal fractures experience good development. Moreover, NMR signal quantity of treated coal under saturated state rises significantly, with big growth in mesopore and macropore peaks. Compared with NMP and acetone, CS2-treated coal porosity experiences the maximum increase of 7.71%, while the corresponding permeability growth is also the largest of 69.565 × 10−15m2. Permeability changes obtained from NMP calculation model is basically consistent with that acquired by lab measurement. Furthermore, changes in extraction rate, ultrasonic parameters, pore fracture characteristics and permeability results of solvent-treated coal are mutually consistent. This verifies that chemical solvents could dissolve molecular substances in coal, effectively increase primary fractures and change small pores to mesopores and macropores, as well as improving pore connectivity. As a result, coalbed methane extraction performance is expected to be enhanced due to increased coal permeability.
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- 2023
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17. P‐75: Novel Post Spacer Design Based on Dynamic Compensation Technology
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LIU, Liwei, IM, Yunsik, LIAO, Feng, WANG, Xinxing, LI, Xiaolong, JIA, Yue, LV, Zhijun, WANG, Hongrun, CHEN, Xiaochuan, and DONG, Xue
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In this paper, we introduce a novel photo spacer (PS) structure to address the PS scratching mura on FFS mode. By precise adjustment of relative position of Sub PS and metal Stage in array glass, the PS mura is completely prevented. We put forward prediction model and conducted experiments to test the effectiveness of the scheme.
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- 2019
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18. Chuanxiong chadiao powder, a famous Chinese herbal prescription, for headache: A systematic review and meta-analysis.
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Li, Ji-Huang, Cao, Xiao-Pan, Wei, Jing-Jing, Song, Liang, Liao, Feng-Jiao, Zheng, Guo-Qing, and Lin, Yan
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Background: Headache have been recognized as major causes of public ill-health, whereas there currently are the limitations of conventional therapies available. Chuanxiong Chadiao Powder (CXCP) is a well-known classic TCM herbal prescription with respect to treating headache for more than 1000 years. The objective of this study is to systematically assess the clinical efficacy and safety of CXCP for headache.Methods: A systematic literature search in four databases, up to May of 2014, was performed to identify randomized controlled trials (RCTs), which compared CXCP monotherapy or adjunct therapy with western conventional medicine (WCM) or placebo for headache. The primary outcome measures were headache frequency, headache duration, pain intensity scales, globe assessment, patients self report outcomes, and quality of life. The second outcome measures were the total clinical effective rate and adverse events. The methodological quality of RCTs was assessed independently based on the 7 criteria recommended by the Cochrane Back Review Group.Results: A total of 3680 participants were included in 37 eligible studies. The methodological quality was generally poor and there was only one high quality trial. Meta-analyses of the studies found that significant effects of CXCP for improving headache frequency and headache duration and the total clinical effective rate compared with WCM or placebo control in treating headache (P<0.01). Adverse event monitoring was reported in 22 studies (59%), while the other 15 studies (41%) did not mentioned.Conclusions: The evidence from present study is supported but limited for CXCP clinical use in the management of headache because of methodological flaws. Larger sample-sizes and rigorously designed RCTs are required in the future. [ABSTRACT FROM AUTHOR]- Published
- 2015
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19. Porphyromonas gingivalis may play an important role in the pathogenesis of periodontitis-associated rheumatoid arthritis.
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Liao, Feng, Li, Zubing, Wang, Yining, Shi, Bin, Gong, Zhongcheng, and Cheng, Xiangrong
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RHEUMATOID arthritis ,PERIODONTITIS ,PORPHYROMONAS gingivalis ,AUTOIMMUNE diseases ,AUTOANTIBODIES ,PEPTIDES ,MAJOR histocompatibility complex - Abstract
Summary: Rheumatoid arthritis (RA) is a common, systemic autoimmune disease which leads to destruction of the joint architecture and consequent disability. Although the aetiology of RA remains unknown, accumulating studies have established a strong association between RA and periodontitis (PD). Recently, anti-cyclic citrullinated peptide (anti-CCP) autoantibody and citrullinated peptide have been realized to be involved in the breaking of self-tolerance and development of autoimmune in RA. The citrullinated peptide is generated by post-translational modification (citrullination) of protein-bound arginine by peptidylarginine deiminase (PAD). Porphyromonas gingivalis (P. gingivalis), the major aetiological agent of PD and the only bacterium known to express a PAD enzyme, has been reported to be significantly associated with RA. The antibody titers to P. gingivalis are significantly increased in patients with RA and P. gingivalis antibody titers are significantly correlated with anti-CCP antibody isotypes that are specific to RA. Recent study indicates that the major synovial targets of the RA-specific anti-CCP autoantibodies are deiminated forms of the α- and β- chains of fibrin. Meanwhile, it is also confirmed that bacterial PAD produced by P. gingivalis has the capacity of deiminating arginine in fibrin found in the periodontal lesion. Whatsmore, it has been demonstrated that citrullination of HLA binding peptide causes a 100-fold increase in peptide-MHC affinity and leads to the activation CD4
+ T cells in HLA DRB1 0401 transgenic mice. Therefore, we postulate that P. gingivalis may play a crucial role in the pathogenesis of periodontitis-associated RA. P. gingivalis, which colonizes in the oral cavity, produces PAD enzyme continuously that leads to the citrullination of RA autoantigen such as fibrin in synovium joint. These PAD engendered antigens, presented in association with major histocompatibility complex (MHC) molecules by antigen-presenting cells (APC), ultimately lead to production of the anti-CCP antibody. The anti-CCP antibodies form immune complexes with citrullinated proteins, which can be bound by inflammatory cells via their Fc receptors. The roles of these immune complexes and inflammatory cells are mediated by a complex cascade involving complement activation. These mechanisms result in a release of mediators of inflammation and joint destruction ultimately leading to the onset of RA. This hypothesis reveals that oral bacterial infection may play a role in peptide citrullination which might be involved in loss of self-tolerance and development of autoimmune in RA. [Copyright &y& Elsevier]- Published
- 2009
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20. An Orientation Method for Ultrasonic Linear Array Signals and its Application
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Xie, Qing, Liao, Feng, and Hu, Wei Tao
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A new high-precision method to orient the ultrasonic linear array signals was proposed in this paper. First, the FastICA algorithm was used to de-noise the ultrasonic linear array signals; then the TCT algorithm is used to focus the ultrasonic linear array signals to greatest extent to cumulate the position information of broadband signals, the FastDOA is used to estimate the direction-of-arrival (DOA) of focused narrowband signals to speed up the calculation after focusing; Then, the application of partial discharge detection using this method was studied, the estimated accuracy of the method was simulated with different SNR(Signal to Noise Ratio) at first, the results show that the errors of DOA were about 2°;At last, the results from some experiments show that the errors were about 3.5°, which indicates that this estimation method is with a good accuracy.
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- 2014
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21. Study on the Power Transformers Deterioration State Evaluation Index System
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Xie, Qing, Hou, Shan Shan, Liao, Feng, and Hu, Wei Tao
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Large power transformers as the the hub of power system equipment, its operation reliability directly related to the security and stability of the power system. When we have to make a more comprehensive and accurate judgment for running health status of the power transformer,we must get the characteristics of the transformer state. In this paper, we can pick out representative indicators from the existing power transformers deterioration state elements. Thereby, we can study more systematic and targeted the deteriorated state of the power transformer. Keywords: power transformers; deterioration state ;evaluation
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- 2013
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22. A Heuristic Algorithm for Decision Table Reduction
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Su, Na, Liao, Feng Feng, and Wu, Zhe Hui
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The independency between two attribute subsets can be verified based on Chi square statistic to reduce candidate sets. Based on this measure, heuristic algorithm employing information entropy for reduction of decision systems is presented by combining rough sets and statistics. And the validity of this algorithm is analyzed.
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- 2012
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23. Preparation and Properties of UV Curable Silica Coatings from MPTMS and TEOS
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Liao, Feng and Zeng, Xing Rong
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UV curable 3-(trimethoxysilyl) propyl methacrylate MPTMS modified silica hybrid coating was prepared through sol-gel process from TEOS and MPTMS in acid medium for different ratios between TEOS and MPTMS. The structure of the hybrid coating and the formation of inorganic-organic hybrid networks were studied by FT-IR. It was found that the organic networks were formed by the polymerization of C=C bonds at 1638 cm-1. The influences of the photoinitiator content and the curing time on the curing degree of the mixture system were investigated. The results showed that the optimal photoinitiator content was 3%, and curing time was 180 s. The thermal stability of the UV cured coating was investigated by TG-DTA. The results showed that the contents of low-molecular compounds such as H2O, CH3OH, etc. were decreased in cured coatings with the increasing of the MPTMS concentration, thus significantly decreasing of the thermal weight-loss at temperature lower than 400℃.
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- 2011
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24. The Structure and Curing Acceleration of PMUF Resins with Sodium Carbonate
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Gao, Zhen Zhong and Liao, Feng
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The phenol-melamine-urea-formaldehyde (PMUF) cocondensed resin adhesive was prepared by using phenol, urea, melamine and formaldehyde as reactants. It was characterized by 13C NMR and the results indicated that the PMUF could reduce the content of free formaldehyde, and it could make wood-based panel with high water resistance and weatherability. Sodium carbonate (Na2CO3) was able to shorten the curing time by 40% when applied to the plywood process. The addition of Na2CO3 as the curing accelerator of a PMUF had little influence on the bonding strength of waterproof layer and could shorten the hot-press time.
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- 2011
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25. Molecular Beam Mass Spectrometry System for Characterization of Thermal Plasma Chemical Vapor Deposition
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Park, Soonam, Liao, Feng, Larson, John M., Girshick, Steven L., and Zachariah, Michael R.
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A molecular beam mass spectrometry system for in situmeasurement of the concentration of gas phase species including radicals impinging on a substrate during thermal plasma chemical vapor deposition (TPCVD) has been designed and constructed. Dynamically controlled substrate temperature was achieved using a variable thermal contact resistance method via a backside flow of an argon/helium mixture. A high quality molecular beam with beam‐to‐background signal greater than 20 was obtained under film growth conditions by sampling through a small nozzle (75 μm) in the center of the substrate. Mass discrimination effects were accounted for in order to quantify the species measurements. We demonstrate that this system has a minimum detection limit of under 100 ppb. Quantitative measurements of hydrocarbon species (H, H2, C, CH3, CH4, C2H2, C2H4) using Ar/H2/CH4mixtures and silicon species (Si, SiH, SiH2, SiCl, SiCl2, Cl, HCl) using Ar/H2/SiCl4mixtures were obtained under thermal plasma chemical vapor deposition conditions.
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- 2004
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26. Chloro(N-p-nitrobenzoylimido-meso-tetraphenylporphyrinato)iron(iii): a high-spin complex
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Chen, Ching-Huei, Lee, Yu-Yi, Liau, Bing-Chuang, Elango, Shanmugham, Chen, Jyh-Horung, Hsieh, Hsi-Ying, Liao, Feng-Ling, Wang, Sue-Lein, and Hwang, Lian-Pin
- Abstract
The crystal structures of diamagnetic (methanol)(N-p-nitrobenzoylimido-meso-tetraphenylporphyrinato)zinc(ii) methanol solvate Zn(N-p-NCOC6H4NO2-tpp)(MeOH)·MeOH [or
4 (MeOH)·MeOH] and paramagnetic chloro(N-p-nitrobenzoylimido-meso-tetraphenylporphyrinato)iron(iii) Fe(N-p-NCOC6H4NO2-tpp)Cl (5 ), were determined. Both are pentacoordinate complexes where the p-nitrobenzoylimido (NNB) moiety is inserted into a zincpyrrole (or ironpyrrole) bond. The coordination geometry of the zinc (or iron) center is best described as a distorted trigonal bipyramid with the N(2), N(5), and O(4) [or N(2), N(5), and Cl(1)] atoms lying in the equatorial plane. The plane of the three pyrrole nitrogen atoms [i.e., N(1), N(2) and N(3)] strongly bonded to Zn2+ in4 (MeOH)·MeOH (or Fe3+ in5 ) is adopted as a reference plane, 3N. The porphyrin ring is severely distorted and the pyrrole ring N(4) is bonded to the NNB ligand making a dihedral angle of 30.0° (or 27.8°) with the 3N plane for4 (MeOH)·MeOH (or5 ). Solid state magnetic susceptibility and the effective magnetic moment data were measured for5 from 300 to 5 K. In the higher temperature range (T > 50 K), the effective magnetic moment is constant and is equal to 5.87 μB. This μeff value confirms that there is a high-spin ferric (S = 5/2) state for the iron atom in5 . The g values of 9.5 ± 0.4, 4.2 and 1.1 measured from X-band EPR spectra were also consistent with a high-spin ferric iron in5 . The magnitude of zero field splitting, D, and the rhombicity parameter, λ (= E/D), in5 were determined approximately as 0.79 cm−1 and 0.29, respectively, by EPR spectroscopy and paramagnetic susceptibility measurements.- Published
- 2002
27. Effects of flowable composite lining and operator experience on microleakage and internal voids in class II composite restorations
- Author
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Chuang, Shu-Fen, Liu, Jia-Kuang, Chao, Chen-Chi, Liao, Feng-Pin, and Chen, Yea-Huey Melody
- Abstract
Statement of problem.When inexperienced clinicians perform class II composite restorations, improper placement techniques can lead to problems, including marginal adaptation and void formation. Purpose.The aim of this study was to determine the influence of flowable composite linings on marginal microleakage and internal voids in class II composite restorations performed by practitioners with different levels of experience. Material and methods.Eighty extracted molars were prepared with mesial and distal class II cavity preparations and divided into 4 groups. Each group was restored separately with the following materials: Prodigy/Revolution lining (group I), Prodigy (group II), Tetric Ceram/Tetric Flow lining (group III), and Tetric Ceram (group IV). Each group was equally divided and restored by 2 practitioners, one experienced and another untrained in composite restorations. After restoration, all teeth were stored for 24 hours, thermocycled (at 5°C to 60°C) 1500 times, and soaked in 2% basic Fuchsin dye for 24 hours. After soaking, the teeth were sectioned, and gingival marginal microleakage and internal voids (at the gingival wall interface and in the cervical and the occlusal parts) were recorded. Data were analyzed with the Kruskal-Wallis test. Results.There was no significant reduction in microleakage for either practitioner. There were fewer interface voids within pairs with or without flowable composite linings made by the experienced practitioner (P<.05). Conclusion.When flowable composite lining was placed at the gingival floor of a class II composite restoration by an experienced practitioner, voids in the restored interface were reduced. Gingival marginal sealing was not improved by the same technique. (J Prosthet Dent 2001;85:177-83.)
- Published
- 2001
- Full Text
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28. Crystal structure and two-stage hydrolysis of dimethoxo (meso-tetra(4-methoxyphenylporphyrinato))tin(IV), Sn(tmpp)(OMe)2
- Author
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Yang, Chun-Bo, Tung, Jo-Yu, Chen, Jyh-Horung, Liao, Feng-Ling, Wang, Sue-Lein, Wang, Shin-Shin, and Hwang, Lian-Pin
- Abstract
In this work, we determine the crystal structure of dimethoxo(meso-tetra(4-methoxyphenylporphyrinato))tin(IV), Sn(tmpp)(OMe)2(1). Experimental results indicate that the tin atom has an octahedral geometry. The geometry around the tin center has Sn(1)–O(5) = 2.020(6), Sn(1)–O(6) = 2.003(7) Å and an average Sn(1)–N = 2.10(1) Å. The two methoxo groups are unidentately coordinated to the tin(IV) atom. Two-stage hydrolysis of Sn(tmpp)(OMe)2in CDCl3was observed by 1H and 13C NMR spectroscopy. Compound (1) crystallizes in the space group P21/nwith a= 14.7492(1), b= 19.2022(3), c= 16.0806(2) Å, β = 94.104(1)°, and Z= 4.
- Published
- 1998
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29. Intramolecular benzoate exchange in benzoato meso-tetra (4-methoxyphenylporphyrinato) thallium(III), Tl(tmpp) (C6H5CO2)
- Author
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Sheu, Yeong-Horng, Hong, Tay-Ning, Chen, Jyh-Horung, Liao, Feng-Ling, Wang, Sue-Lein, Wang, Shin-Shin, and Yang, Thomas C.
- Abstract
The new compound benzoato meso-tetra(4-methoxyphenylporphyrinato)thallium(III), Tl(tmpp)(C6H5CO2), has been synthesized and its molecular structure determined by X-ray analysis. The coordination sphere of the Tl3+ ion is an approximate square-based pyramid in which the apical site is occupied by an asymmetric-bidentate C6H5CO2− group. The average Tl-N bond distance is 2.24(1)A˚and the Tl atom is displaced 0.811A˚from porphyrin plane. The Tl(1)-O(5) and Tl(1)-O(6) distances are 2.57(2) and 2.27(2)A˚, respectively. Variable temperature 13C NMR measurements show that the benzoato group of Tl(tmpp)(C6H5CO2) in CD2Cl2 solvent undergoes intramolecular exchange. In the slow exchange region, the carbonyl and C1″ carbons of the benzoato group are separately located at 167.8 ppm [with 2J (Tl-13C) coupling constant 212 Hz] and 128.3 ppm [with 3J (Tl-13C) coupling constant 282 Hz] for T1 (tmpp)(C6H5CO2) in CD2Cl2 at −90°C. In the fast exchange region, the C*OO and C1″ carbons of the C6H5CO2− ligand in CD2Cl2 at 21°C are singlets at 168.4 and 130.3 ppm, respectively. The comparison of the ring current effect (Δδ) for the benzoate ligand of Tl(tmpp)(C6H5CO2) and benzoato meso-tetra(4-methoxyphenylporphyrinto)tin(IV), Sn(tmpp)(C6H5CO2)2, is also reported.
- Published
- 1997
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30. Oxidized lipoproteins influence gene expression by causing oxidative stress and activating the transcription factor NF-κB
- Author
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Andalibi, Ali, Liao, Feng, Imes, Susan, Fogelman, Alan M., and Lusis, Aldons J.
- Published
- 1993
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31. 51‐3: New ADS pixel design with Black Post Spacer for 8k application
- Author
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Wang, Hong-run, Hou, Kai, Yang, Yue, Dong, Li-wen, Niu, Hai-jun, Liao, Feng, IM, Yunsik, and Chen, Xiao-Chuan
- Abstract
We present a new ADS pixel design base on BPS (Black Post Spacer) on array technology to improve transmittance and save to cost. By putting BPS above data line, light leakage caused by data electric field was prevented, leading to higher transmittance in 8k application. In this paper, we studied key parameter and the optical performance of the new pixel design.
- Published
- 2019
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32. Direct single-mode lasing in polymer microbottle resonators through surface destruction
- Author
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Ubaid, Saima, Liao, Feng, Guo, Tao, Gu, Zhaoqi, Linghu, Shuangyi, Ma, Yanna, Yu, Jiaxin, and Gu, Fuxing
- Abstract
We demonstrate an effective approach of mode suppression by simply using a tungsten probe to destroy the external neck surface of polymer microbottle resonators. The higher-order bottle modes with large axial orders, spatially located around the neck surface of the microresonator, will suffer large optical losses. Thus, excitation just with an ordinary free-space light beam will ensure direct generation of single fundamental bottle mode lasers. This method is with very low cost and convenient and can obtain high side-mode suppression factors. Our work demonstrated here may have promising applications such as in lasing and sensing devices.
- Published
- 2019
33. Corrigendum to "Impact of moderate to severe chronic kidney disease for long term survival of implantable cardioverter defibrillator patients in Taiwan" [Int J Gerontol 12 (2018) 89–93].
- Author
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Liao, Feng-Ching, Hsiao, Chia-Ying, Chao, Chuan-Lei, Cheng, Chun-Han, Wu, Meng-Ruey, Su, Min-I., Chen, Chun-Yen, and Wang, Kuang-Te
- Published
- 2018
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34. Differential multiple-time-programmable memory cells by laterally coupled floating metal gate fin field-effect transistors
- Author
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Hsu, Ling, Liao, Feng, Chien, Wei Yu, Chih, Der, Jung, Chrong, and, Lin, and King, Chin
- Abstract
In this paper, we present a new differential multiple-time-programmable (MTP) memory cell with a novel slot contact coupling structure in the fin field-effect transistor (FinFET) CMOS process. This MTP cell contains a pair of floating metal gates to store differential data on a single cell. Through differential read operations, the cells are less susceptible to read error caused by cell-to-cell variations. In a nano-scaled FinFET process, the gate dielectric layer becomes too thin to retain charge in the floating gates for long periods of time. Differential cell design further extends the data lifetime, even with the serious charge-loss problem, and reduces the overall intellectual property (IP) area.
- Published
- 2017
35. ChemInform Abstract: Intramolecular Cyclizations via Carbenoid Intermediates in Complexation of Alkynyltungsten Compounds with Co2(CO)8: A New Route to the Pauson—Khand Reaction.
- Author
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Shiu, Yung‐Tai, Madhushaw, Reniguntala J., Li, Wen‐Tai, Lin, Yin‐Chih, Lee, Gene‐Hsian, Peng, Shie‐Ming, Liao, Feng‐Lin, Wang, Sue‐Lang, and Liu, Rai‐Shung
- Abstract
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
- Published
- 1999
- Full Text
- View/download PDF
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