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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)

Integrating Intra-and Inter-document Evidences for Improving Sentence Sentiment Classification

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自动化学报 2010年第10期36卷 1417-1425页

作者： zhao yan-yan QIN Bing LIU Ting Research Center for Information Retrieval Harbin Institute of Technology Harbin 150001 P. R. China

Sentence sentiment classification is an important task of sentiment analysis. It aims to classify the sentences into positive, negative,or objective. One can consider sentence sentiment classification as a standard text categorization problem. However, determining the sentiment orientation of a review sentence requires more than the features inside the sentence itself, especially for the sentences with little or ambiguous inside sentence features. Through observing, some features outside the sentence can interact with its inside features to enhance the overall performance of sentence sentiment classification. Thus in this paper,we propose two such outside sentence features:intra-document evidence and inter-document evidence. Then in order to improve the sentence sentiment classification performance,a graph-based propagation approach is presented to incorporate these inside and outside sentence features. The experimental results on camera domain show that the proposed approach performs better than the approaches without using outside sentence features, and outperforms other representational previous approaches

关键词：数码相机像素富士光学变焦

Prognostic Values of Serum Chloride and Sodium Levels in Patients with Three-vessel Disease

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Biomedical and Environmental Sciences 2019年第4期32卷 250-259页

作者： ZHANG Ce WANG Dong HOU Bing Jie JIANG Lin XU Lian Jun TIAN Jian zhao yan yan zhao Xue yan FENG Xin Xing ZHANG Yin SUN Kai XU Bo zhao Wei HUI Ru Tai GAO Run Lin LOU Hui Ling YUAN Jin Qing SONG Lei Department of Cardiology Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical College State Key Laboratory of Cardiovascular Disease Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical College Department of Internal Medicine The People's Hospital of Tang County Medical Research & Biometrics Center Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical College Department of Endocrinology Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical College Information Center Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical College Department of Geriatrics Guangzhou First People's HospitalSchool of MedicineSouth China University of Technology

Objective Identification of new risk factors is needed to improve prediction of adverse outcomes in patients with three-vessel disease(TVD). The present study aimed to evaluate the prognostic values of serum chloride and sodium levels in patients with TVD. Methods We used data from a prospective cohort of consecutive patients with angiographically confirmed TVD. The primary endpoint was all-cause death. Cox proportional hazard regression was used to analyze the relationship of serum chloride and sodium levels with long-term outcomes of TVD patients. Results A total of 8,318 participants with available serum chloride and sodium data were included in this analysis. At baseline, patients in the low tertiles group of serum chloride level(≤ 102.0 mmol/L) or serum sodium level(≤ 139.0 mmol/L) had more severe disease conditions. During a median follow-up of 7.5-year, both low serum chloride level and low serum sodium level were found to be associated with an increased risk for mortality in univariate analysis. However, when both parameters were incorporated into a multivariate model, only low serum sodium level remained to be an independent predictor of all-cause death(hazard ratio: 1.16, 95% confidence interval: 1.01-1.34, P = 0.041). Modest but significant improvement of discrimination was observed after incorporating serum sodium level into the Synergy between percutaneous coronary intervention(PCI) with Taxus and Cardiac Surgery score. Conclusion Serum sodium level is more strongly associated with long-term outcomes of TVD patients compared with serum chloride level. Low serum sodium level is an independent risk factor for mortality, but only provides modest prognostic information beyond an established risk model.

关键词： Coronary disease Prognosis Biomarkers

Long-Term Prognosis of Different Reperfusion Strategies for ST-Segment Elevation Myocardial Infarction in Chinese County-Level Hospitals:Insight from China Acute Myocardial Infarction Registry

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Biomedical and Environmental Sciences 2023年第9期36卷 826-836页

作者： WU Chao ZHANG Qiong Yu LI Ling ZHANG Xu Xia CAI Yong Chen yanG Jin Gang XU Hai yan zhao yan yan WANG yang LI Wei JIN Chen GAO Xiao Jin yanG Yue Jin QIAO Shu Bin Coronary Heart Disease Center Department of CardiologyState Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeFuwai HospitalBeijing 100037China Hypertension Center Department of CardiologyState Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeFuwai HospitalBeijing 100037China Medical Research&Biometrics Center State Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeFuwai HospitalBeijing 100037China Department of Cardiology Tonghua Central HospitalTonghua 134000JilinChina Department of Cardiology The First Hospital of SuihuaSuihua 152054HeilongjiangChina

Objective To evaluate the long-term prognosis of patients with ST-segment elevation myocardial infarction(STEMI)treated with different reperfusion strategies in Chinese county-level hospitals Methods A total of 2,514 patients with STEMI from 32 hospitals participated in the China Acute Myocardial Infarction registry between January 2013 and September *** success of fibrinolysis was assessed according to indirect measures of vascular *** primary outcome was 2-year *** Reperfusion therapy was used in 1,080 patients(42.9%):fibrinolysis(n=664,61.5%)and primary percutaneous coronary intervention(PCI)(n=416,38.5%).The most common reason for missing reperfusion therapy was a prehospital delay>12 h(43%).Fibrinolysis[14.5%,hazard ratio(HR):0.59,95%confidence interval(CI)0.44–0.80]and primary PCI(6.8%,HR=0.32,95%CI:0.22–0.48)were associated with lower 2-year mortality than those with no reperfusion(28.5%).Among fibrinolysistreated patients,510(76.8%)achieved successful clinical reperfusion;only 17.0%of those with failed fibrinolysis underwent rescue *** was no difference in 2-year mortality between successful fibrinolysis and primary PCI(8.8%vs.6.8%,HR=1.53,95%CI:0.85–2.73).Failed fibrinolysis predicted a similar mortality(33.1%)to no reperfusion(33.1%vs.28.5%,HR=1.30,95%CI:0.93–1.81).Conclusion In Chinese county-level hospitals,only approximately 2/5 of patients with STEMI underwent reperfusion therapy,largely due to prehospital *** 30%of patients with failed fibrinolysis and no reperfusion therapy did not survive at 2 *** improvement initiatives are warranted,especially in public health education and fast referral for mechanical revascularization in cases of failed fibrinolysis.

关键词： Acute myocardial infarction Reperfusion therapy Rural Outcome

Comprehensive analysis of the full-length transcripts and alternative splicing involved in clubroot resistance in Chinese cabbage

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Journal of Integrative Agriculture 2023年第11期22卷 3284-3295页

作者： SU He-nan YUAN Yu-xiang yanG Shuang-juan WEI Xiao-chun zhao yan-yan WANG Zhi-yong QIN Liu-yue yanG Zhi-yuan NIU Liu-jing LI Lin ZHANG Xiao-wei Institute of Horticulture Henan Academy of Agricultural SciencesZhengzhou 450002P.R.China School of Materials Science and Engineering Central South UniversityChangsha 410083P.R.China

Chinese cabbage is an economically important Brassica vegetable worldwide, and clubroot, which is caused by the soilborne protist plant pathogen Plasmodiophora brassicae is regarded as a destructive disease to Brassica crops. Previous studies on the gene transcripts related to Chinese cabbage resistance to clubroot mainly employed RNA-seq technology,although it cannot provide accurate transcript assembly and structural information. In this study, PacBio RS II SMRT sequencing was used to generate full-length transcriptomes of mixed roots at 0, 2, 5, 8, 13, and 22 days after P. brassicae infection in the clubroot-resistant line DH40R. Overall, 39 376 high-quality isoforms and 26 270 open reading frames(ORFs) were identified from the SMRT sequencing data. Additionally, 426 annotated long noncoding RNAs(lncRNAs),56 transcription factor(TF) families, 1 883 genes with poly(A) sites and 1 691 alternative splicing(AS) events were identified. Furthermore, 1 201 of the genes had at least one AS event in DH40R. A comparison with RNA-seq data revealed six differentially expressed AS genes(one for disease resistance and five for defensive response) that are potentially involved in P. brassicae resistance. The results of this study provide valuable resources for basic research on clubroot resistance in Chinese cabbage.

关键词： Chinese cabbage clubroot full-length transcriptome SMRT sequencing alternative splicing

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文本情感分析

软件学报 2010年第8期21卷 1834-1848页

作者：赵妍妍秦兵刘挺哈尔滨工业大学计算机科学与技术学院信息检索研究中心黑龙江哈尔滨150001

对文本情感分析的研究现状与进展进行了总结.首先将文本情感分析归纳为3项主要任务,即情感信息抽取、情感信息分类以及情感信息的检索与归纳,并对它们进行了细致的介绍和分析;进而介绍了文本情感分析的国内外评测和资源建设情况;最后介... 详细信息

对文本情感分析的研究现状与进展进行了总结.首先将文本情感分析归纳为3项主要任务,即情感信息抽取、情感信息分类以及情感信息的检索与归纳,并对它们进行了细致的介绍和分析;进而介绍了文本情感分析的国内外评测和资源建设情况;最后介绍了文本情感分析的应用.重在对文本情感分析研究的主流方法和前沿进展进行概括、比较和分析.

关键词：文本情感分析情感信息抽取情感信息分类情感信息的检索与归纳评测资源建设

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高粱种子萌发过程中超微弱光子辐射的特征

作物学报 2018年第5期44卷 783-789页

作者：赵燕燕习岗郑州工业应用技术学院河南郑州451100 西安理工大学理学院应用物理系陕西西安710048

采用50μg mL^(1)的蛋白质合成转录抑制剂放线菌素D(actinomycin D,AMD)、100μg mL^(1)的蛋白质合成翻译抑制剂环己亚胺(cycloheximide,CHM)和650μg mL^(1)的呼吸抑制剂NaN_3处理萌发高粱种子,研究了高粱种子萌发过程中自发光子辐射和... 详细信息

采用50μg mL^(1)的蛋白质合成转录抑制剂放线菌素D(actinomycin D,AMD)、100μg mL^(1)的蛋白质合成翻译抑制剂环己亚胺(cycloheximide,CHM)和650μg mL^(1)的呼吸抑制剂NaN_3处理萌发高粱种子,研究了高粱种子萌发过程中自发光子辐射和LED诱导的延迟光子辐射的动力学特征及其变化规律。结果发现,高粱萌发过程中的自发光子辐射强度与种子鲜质量的变化呈正相关(相关系数r为0.93121),AMD和CHM不同程度地抑制了萌发过程中高粱鲜质量的增长,NaN_3几乎完全抑制了鲜质量的增长,表明高粱萌发过程中的自发光子辐射强度可以作为萌发状况的信号,RNA/DNA合成反应是高粱萌发过程中自发光子辐射的来源之一,呼吸代谢是其主要来源。高粱萌发过程中的延迟光子辐射特征可用动力学参数初始光子数、相干时间和延迟光子辐射积分强度定量表达,通过对延迟光子辐射积分强度的测量和分析可以实时、灵敏和无损伤的了解和判断高粱萌发过程中细胞代谢系统的动态变化。

关键词：高粱萌发超微弱光子辐射蛋白质合成抑制剂呼吸代谢抑制剂无损检测

酸分馏效应对GasBench-IRMS测定碳酸盐碳、氧同位素的影响

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质谱学报 2024年第3期45卷 401-411,I0004页

作者：王楠赵彦彦田有荣中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室山东青岛266100 中国海洋大学海洋高等研究院深海圈层与地球系统前沿科学中心山东青岛266100 赛默飞世尔科技(中国)有限公司上海201206

本文利用在线制样装置(GasBench)和稳定同位素比质谱仪(IRMS)测试一系列碳酸盐标准物质和现代海洋浮游有孔虫样品,在不同测试条件下,分析不同性状碳酸盐矿物的氧同位素分馏程度,计算氧同位素酸分馏系数,探讨酸分馏效应对不同碳酸盐矿物... 详细信息

本文利用在线制样装置(GasBench)和稳定同位素比质谱仪(IRMS)测试一系列碳酸盐标准物质和现代海洋浮游有孔虫样品,在不同测试条件下,分析不同性状碳酸盐矿物的氧同位素分馏程度,计算氧同位素酸分馏系数,探讨酸分馏效应对不同碳酸盐矿物氧同位素测定的影响机制和控制因素,以及对氧同位素测试值(δ^(18)O_(m))的校正方法。结果表明,酸分馏效应对氧同位素值的影响主要是由于生成的CO_(2)气体与顶空瓶中气态水(高温时主要影响)或酸中游离态自由水(低温时主要影响)之间发生氧同位素交换引起的。不同性状碳酸盐标准物质的氧同位素酸分馏系数具有显著差异,且与氧同位素组成相关。δ^(18)O_(m)值发生偏移的程度与反应温度、样品量、磷酸含水量以及酸中游离态和气态水的氧同位素组成与样品氧同位素组成之间的差异等因素有关。氧同位素酸分馏效应与信号强度具有显著相关性。建议精确称量相同质量的标准物质和样品,遵循信号强度匹配的原则,并采用多种标准物质线性校正的方法有效校正氧同位素分馏现象。在较低的反应温度(25℃)下,氧同位素分馏程度较轻微,δ^(18)O分析精度更高,优于0.05‰。本方法为精确测定碳酸盐中碳、氧同位素组成提供了参考,可有效提高相关的测试精度。

关键词：在线制样装置-稳定同位素比质谱仪(GasBench-IRMS) 磷酸法碳酸盐氧同位素酸分馏效应

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一种人我合一的理想同感反应形态:比较哲学的视角

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道德与文明 2020年第3期 124-132页

作者：赵妍妍南京大学马克思主义学院暨中国传统文化研究中心江苏南京210023

同感自我中心主义的质疑对我们与他人感同身受这一同感特征的道德性提出了挑战。数值上的合一主张、性质上的人我合一主张以及概念上的人我合一主张看似在某种程度上回应了同感自我中心主义的质疑,但是这些回应都存在各自的问题。相比之... 详细信息

同感自我中心主义的质疑对我们与他人感同身受这一同感特征的道德性提出了挑战。数值上的合一主张、性质上的人我合一主张以及概念上的人我合一主张看似在某种程度上回应了同感自我中心主义的质疑,但是这些回应都存在各自的问题。相比之下,从《孟子》和朱熹的"一体""恻隐""怵惕"思想中提炼出的人我合一形态则有助于我们回应同感自我中心主义的质疑。

关键词：同感自我中心主义人我合一一体恻隐怵惕