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Application of artificial neural network for switching loss modeling in power IGBTs

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第6期11卷 435-443页

作者： Yan DENG Xiang-ning HE Jing ZHAO Yan XIONG Yan-qun SHEN jian jiang School of Electrical Engineering Zhejiang University Hangzhou 310027 China

The modeling of switching loss in semiconductor power devices is important in practice for the prediction and evaluation of thermal safety and system *** simulation-based behavioral models and data processing-based empirical models are difficult and have limited *** the artificial neural network(ANN) algorithm has often been used for modeling, it has never been used for modeling insulated gate bipolar transistor(IGBT) transient *** this paper, we attempt to use the ANN method for this purpose, using a customized switching loss test *** compare its performance with two conventional curve-fitting models and verify the results by *** model is generally superior in calculation speed, accuracy, and data requirement, and is also able to be extended to loss modeling for all kinds of semiconductor power devices.

关键词： Insulated gate bipolar transistor(IGBT) Switching loss Modeling Artificial neural network(ANN)

Isolation and Characterization of a Methomyl-Degrading Paracoccus ***-1

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Pedosphere 2009年第2期19卷 238-243页

作者： XU Jing-Liang WU Jun WANG Zhi-Chun WANG Kun LI Meng-Ying jiang jian-Dong HE jian LI Shun-Peng Key Laboratory for Microbiological Engineering of Agricultural Environment of Ministry of Agriculture Nanjing Agricultural University Nanjing 210095 China Guangzhou Institute of Energy Conversion Key Laboratory of Renewable Energy and Gas Hydrate Chinese Academy of Sciences Guangzhou 510640 China

Methomyl, an extremely toxic pesticide, is widely used in agriculture. A strain named mdw-1 capable of degrading methomyl rapidly was successfully isolated from activated sludge in this study. It could utilize methomyl as the sole carbon or nitrogen source. The optimal temperature and medium pH for its growth and methomyl biodegradation were 30℃ and 7.0, respectively. It was identified as a Paracoccus sp. according to its morphological features, physiological and biochemical characteristics, and phylogenetic analysis based on the sequence of 16S rDNA. Gas chromatography-mass spectrometry （GC-MS） analysis showed that methomyl could be completely transformed to S-methyl-N-hydroxythioacetamidate in 10 h of incubation with the isolate mdw-1.

关键词： methomyl degradation Paracoccus sp. S-methyl-N-hydroxythioacetamidate 16S rDNA strain mdw-1

Oxide Scale Growth on High Carbon Steel at High Temperatures

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Journal of Iron and Steel Research International 2013年第1期20卷 47-52页

作者： HU Xian-jun ZHANG Bi-ming CHEN Shao-hui FANG Feng jiang jian-qing School of Materials Science and Engineering Southeast University jiangsu Sha-Steel Group

The structure and formation process of oxidation on high carbon steel were investigated with the aid of X-ray diffraction （XRD）, scanning electron microscope （SEM） and Laser Raman spectroscopy （LRS）. The oxide scale formed comprised a three-layer structure, similar to that formed on pure iron and low-carbon steel. For the high carbon steel, however, the scale was essentially a two-layered because of the low proportion of hematite （Fe2O3） formed. The scale thickness increased with the temperature and time of oxidation. The rate of scale thickening rapidly increased above 900 ℃, at which the rate was particularly fast in the first 20 s of oxidation. The proportion of wüstite （Fe1-yO） increased with time and temperature of oxidation, while the magnetite （Fe3O4） remained constant at about 2 μm.

关键词： oxide scale high carbon steel thickness phase constitution

Congenital fibrovascular pupillary membranes: case series with pathological correlation and surgical treatment

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International Journal of Ophthalmology(English edition) 2022年第4期15卷 669-671页

作者： Yi Zhou Cong Fan Xiao-Bo Xia jian jiang Eye Center of Xiangya Hospital Central South University Changsha 410008Hunan ProvinceChina

Dear Editor,We present three cases of congenital fibrovascular pupillary membranes(CFPM) with pathological correlation and surgical treatment. CFPM was first described by Cibis et al;as a new entity of anterior segmen... 详细信息

关键词： membranes congenital surgical

Review on Intrinsic Electrocatalytic Activity of Transition Metal Nitrides on HER

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Energy Material Advances 2022年第1期2022卷 45-72页

作者： Han-Ming Zhang jian-jiang Wang Yongqiang Meng Fushen Lu Muwei Ji Caizhen Zhu jian Xu Jinfeng Sun School of Material Science and Engineering Hebei University of Science and TechnologyShijiazhuangHebei 050018China Hebei Key Laboratory of Flexible Functional Materials ShijiazhuangHebei 0500180China College of Chemistry and Chemical Engineering Shantou UniversityShantouGuangdong 515000China Institute of Low-dimensional Materials Genome Initiative College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhenGuangdong 518060China

Hydrogen energy is considered as an ideal energy with the advantages of green,sustainability,and high energy density,and water splitting is one of the efficient strategies for green hydrogen without carbon *** for cathodic hydrogen evolution reaction(HER),besides the Pt-based electrocatalysts with excellent electrocatalytic activities on HER,transition metal nitrides(TMNs)as cheap and facile-prepared electrocatalysts have shown remarkable electrocatalytic *** of N atom in metal interstitial lattice results in the unique structure of TMN with high electronic conductivity,strong chemical stability,and d-band *** the intrinsic electrocatalytic activities of TMNs are mostly lower than those of Pt,it also attracted much attention to the development of TMN with higher intrinsic activity by electronic structure ***,we review the recent improvement strategies for the intrinsic electrocatalytic activities of TMN catalysts on HER by electronic structure modulation,such as facet,alloying,doping,vacancy,heterostructure,and *** important breakthroughs of TMNs have been made;however,the scale application of TMNs with high activity in commercial water electrolyzer is urgent to *** future development of TMNs is proposed to focus on developing facile synthesis methods,elucidating regulation mechanism and catalytic mechanism,and enhancing activity and stability.

关键词： breakthrough structure mechanism

Recent developments in activities, utilization and sources of cellulase

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Forestry Studies in China 2009年第3期11卷 202-207页

作者： FENG Yue jiang jian-xin ZHU Li-wei College of Materials Science and Technology Beijing Forestry University Beijing 100083 P. R. China

One of the latest sources of alternative energy, bioethanol, has been the focus of modem research, The production of bioethanol is commonly restricted by the activity of cellulase. Therefore, cellulase has become one of the critical issues in the conversion of lignocelluloses to bioethanol. This article is an overview of the sources and factors affecting enzyme activity, as well as methods of evaluation and utilizations of cellulase. We conclude that a combination of cellulases from various strains can enhance hydrolysis of substrates. Large enough amounts of cellobiase or sufficient cellobiase activity can reduce the inhibition to exoglucanase activity of cellobiose. Characterization and exploitation of cellulase should focus on a definite substrate. Promotion and mixed incubation of strains can reduce the cost of industrial utilization of cellulase.

关键词： cellulase strains inhibitor activity evaluation cellulase utilization

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蒋健诊治郁证性畏寒学术经验

上海中医药杂志 2021年第5期55卷 7-11页

作者：耿琦蒋健上海中医药大学附属曙光医院脾胃病科上海200021

介绍蒋健教授以解郁为主诊治郁证性畏寒的学术经验。认为郁证性畏寒是披着畏寒病证外衣的隐性郁证,具有情志致病的特点,畏寒症状夸张怪异,可伴随自主神经功能紊乱的症状,从郁论治有效。理解与掌握郁证的形态,摒弃对寒证病因病机及其治... 详细信息

介绍蒋健教授以解郁为主诊治郁证性畏寒的学术经验。认为郁证性畏寒是披着畏寒病证外衣的隐性郁证,具有情志致病的特点,畏寒症状夸张怪异,可伴随自主神经功能紊乱的症状,从郁论治有效。理解与掌握郁证的形态,摒弃对寒证病因病机及其治疗方药的狭隘定势思维,是提高郁证性畏寒诊疗水平的两大法宝。

关键词：寒证郁证郁证性畏寒隐性郁证疏肝解郁养心安神

A new flavonoid from Selaginella tamariscina

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Chinese Chemical Letters 2009年第5期20卷 595-597页

作者： jian Feng Liu Kang Ping Xu De jian jiang Fu Shuang Li jian Shen Ying Jun Zhou Ping Sheng Xu Bin Tan Gui Shan Tan School of Pharmaceutical Sciences Central South University Changsha Hunan 410013 China Xiangya Hospital of Central South University Changsha Hunan 410008 China Xiangnan University Chenzhou Itunan 423000 China

6-（2-Hydroxy-5-acetylphenyl）-apigenin （1）, a new flavonoid with a phenyl substituent, was first isolated from Selaginella tamariscina. Its structure was elucidated on the basis of 1D and 2D NMR as well as ESI-HR-M... 详细信息

关键词： Selaginella tamariscina Flavonoids 6-(2-Hydroxy-5-acetylphenyl)-apigenin

Inhibition effects of a negative electret 5-FU patch on the growth of a hypertrophic scar

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Plasma Science and Technology 2018年第5期20卷 78-83页

作者： Wang YUAN Lili XU Ping HUANG Xiaoqiang AN Lili CUI jian jiang Department of Physics and Mathematics College of Basic Medical SciencesSecond Military Medical UniversityShanghai 200433People＇s Republic of China Department of Inorganic Chemistry School of PharmacySecond Military Medical UniversityShanghai 200433People＇s Republic of China

In this study,the hypertrophic scar（HS） model in rats was established.5-fluorouracil（5-FU）patch,-1000 V and-2000 V polypropylene（PP） electret 5-FU patches were prepared and applied onto the *** in vitro permeation experiment was performed using the Franz diffusion cell system to determine the permeation cumulative amount and retention amount of5-FU through/in scar *** inhibition effect of negative electret on growth of HS was studied by hematoxylin-eosin（HE） staining,Masson staining and the immunohistologicall *** permeation study indicated that a negative electret could enhance the permeation and retention of 5-FU through and in scar skin *** staining and Masson staining indicated a better effect for-1000 V and-2000 V electret 5-FU patches on HS inhibition after28 d post-wounding compared with 5-FU *** immunohistological study showed much more reduced expressions of collegan type I,collegan type III,TGF-β1 and HSP47 in scar tissue after application of negative electret 5-FU patches than those of 5-FU patch.A negative electret5-FU patch may be advantageous for HS treatment.

关键词： electret hypertrophic scar 5-fluorouracil patch collagen TGF-β HSP47