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Study of Pressure Balance for Press-Pack IGBTs and Its Influence on Temperature Distribution

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Chinese Journal of Electrical Engineering 2018年第4期4卷 57-63页

作者： zihao zhao Lin Liang Lubin Han State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China

Pressure balance is a key technology for Press-Pack IGBT packaging,and is studied in this paper with its influence on the temperature distribution discussed in further when the device is turned *** establishing the physical model of the Press-Pack IGBT device in the finite element simulation software,the influence of the internal flatness condition on the pressure balance is analyzed,and the variation of the average pressure difference with the flatness in different parallel scale of the chips is *** thermal contact resistance and the electrical contact resistance parameters,which are dependent on the pressure,are then imported to perform the multi-field coupling,further investigating the effect of different pressure distributions on temperature *** junction-case thermal resistance of the device with different flatness is compared *** results have demonstrated the influence of the flatness on the thermal resistance of the Press-Pack IGBT device.

关键词： Press-Pack IGBT pressure balance temperature distribution thermal resistance

Clustering-triggered Emission of Nonaromatic Polymers with Multitype Heteroatoms and Effective Hydrogen Bonding

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Chemical Research in Chinese Universities 2021年第1期37卷 177-182页

作者： KAUSAR Fahmeeda YANG Tianjia zhao zihao ZHANG Yongming YUAN Wang Zhang School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Key Lab of Electrical Insulation and Thermal AgingShanghai Jiao Tong UniversityShanghai200240P.R.China

Nonconventional luminophores without large conjugated structures are attracting increasing attention for their unique aggregation-induced emission(AIE)properties and promising applications in optoelectronic and biomedical *** emission mechanism,however,remains elusive,which makes rational molecular design ***,we proposed the clustering-triggered emission(CTE)mechanism to illustrate the *** clustering of electron-rich nonconventional chromophores withπand/or n electrons and consequent electron cloud overlap is crucial to the ***,based on the CTE mechanism,nonaromatic polymers containing multitype heteroatoms(i.e.,O,N,and S)and involving amide(CONH)and sulfide(-S-)groups were designed and synthesized through facile thiol-ene click *** resulting polymers demonstrated typical concentration-enhanced emission,AIE phenomenon,and excitation-dependent ***,compared with polysulfides,these polymers exhibited much higher solid-state emission efficiencies,because of the incorporation of amide units,which contributed to the formation of emissive clusters with highly rigidified conformations through effective hydrogen ***,distinct persistent cryogenic phosphorescence or even room temperature phosphorescence(RTP)was *** photophysical behaviors can well be rationalized in terms of the CTE mechanism,indicating the feasibility of rational molecular design and luminescence regulation.

关键词： Clustering-triggered emission Aggregation-induced emission Nonaromatic polymer Heteroatom Phosphorescence

Chalcogenide Ovonic Threshold Switching Selector

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Nano-Micro Letters 2024年第5期16卷 1-40页

作者： zihao zhao Sergiu Clima Daniele Garbin Robin Degraeve Geoffrey Pourtois Zhitang Song Min Zhu National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050People’s Republic of China University of Chinese Academy of Sciences Beijing 100029People’s Republic of China IMEC Kapedreef 75LeuvenBelgium

Today’s explosion of data urgently requires memory technologies capable of storing large volumes of data in shorter time frames,a feat unattain-able with Flash or *** Optane,commonly referred to as three-dimensional phase change memory,stands out as one of the most promising *** Optane with cross-point architecture is constructed through layering a storage element and a selector known as the ovonic threshold switch(OTS).The OTS device,which employs chalcogenide film,has thereby gathered increased attention in recent *** this paper,we begin by providing a brief introduction to the discovery process of the OTS ***,we summarize the key elec-trical parameters of OTS devices and delve into recent explorations of OTS materials,which are categorized as Se-based,Te-based,and S-based material ***,we discuss various models for the OTS switching mechanism,including field-induced nucleation model,as well as several carrier injection ***,we review the progress and innovations in OTS mechanism ***,we highlight the successful application of OTS devices in three-dimensional high-density memory and offer insights into their promising performance and extensive prospects in emerging applications,such as self-selecting memory and neuromorphic computing.

关键词： Non-volatile memory Ovonic threshold switch(OTS) Chalcogenide Selector

The Analysis of the Correlation between SPT and CPT Based on CNN-GA and Liquefaction Discrimination Research

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1159-1182页

作者： Ruihan Bai Feng Shen zihao zhao Zhiping Zhang Qisi Yu Key Laboratory of the Ministry of Education for Geomechanics and Embankment Engineering College of Civil and Transportation EngineeringHohai UniversityNanjing210098China School of Civil Engineering Suzhou University of Science and TechnologySuzhou215011China School of Civil Engineering Shenyang Jianzhu UniversityShenyang110168China College of Civil Engineering Tongji UniversityShanghai200092China

The objective of this study is to investigate themethods for soil liquefaction discrimination. Typically, predicting soilliquefaction potential involves conducting the standard penetration test (SPT), which requires field testing and canbe time-consuming and labor-intensive. In contrast, the cone penetration test (CPT) provides a more convenientmethod and offers detailed and continuous information about soil layers. In this study, the feature matrix based onCPT data is proposed to predict the standard penetration test blow count N. The featurematrix comprises the CPTcharacteristic parameters at specific depths, such as tip resistance qc, sleeve resistance f s, and depth H. To fuse thefeatures on the matrix, the convolutional neural network (CNN) is employed for feature extraction. Additionally,Genetic Algorithm (GA) is utilized to obtain the best combination of convolutional kernels and the number ofneurons. The study evaluated the robustness of the proposed model using multiple engineering field data *** demonstrated that the proposed model outperformed conventional methods in predicting N values forvarious soil categories, including sandy silt, silty sand, and clayey silt. Finally, the proposed model was employedfor liquefaction discrimination. The liquefaction discrimination based on the predicted N values was comparedwith the measured N values, and the results showed that the discrimination results were in 75% agreement. Thestudy has important practical application value for foundation liquefaction engineering. Also, the novel methodadopted in this research provides new ideas and methods for research in related fields, which is of great academicsignificance.

关键词： CNN liquefaction discrimination SPT CPT

Fast UV-vis-NIR photoresponse of self-oriented F_(16)CuPc nanoribbons

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Nano Research 2023年第7期16卷 9561-9568页

作者： Lingyu Zhang Xingyu Wang Wei Zhou Hao Wang Jiaxun Song zihao zhao Jihui Liao Jian Song Yajun Li Jinyou Xu Institute of Electronic Paper Displays South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Department of Materials and Interfaces Weizmann Institute of ScienceRehovot 76100Israel

Controlling the vapor-deposited nanoribbons to grow along a consistent orientation will enable the desired in situ integration of functional devices,representing a major technological advance compared to post-growth processing *** this work,ntype F_(16)CuPc molecules are self-assembled into horizontally-oriented nanoribbons with a consistent growth axis after creating periodic hydrophobic nanogrooves on a sapphire ***,electrodes are deposited directly on the growth substrate to enable in situ fabrication of *** on the deposited electrodes,these horizontally-oriented nanoribbons are connected to form a monolithic photodetector with a large sensing area or an on-chip array of photodetectors with multiple detector *** in situ integration strategy avoids potential structural damage and contamination from impurities associated with post-growth processing ***,the vapor-deposited nanoribbons can retain their high quality during the device manufacturing process,which contributes to performance *** a result,the in-situ integrated F_(16)CuPc photodetectors exhibit a sensitive response in the ultraviolet-visible-near-infrared(UV-vis-NIR)*** response time is on the order of tens of milliseconds,the fastest record ever for the F_(16)CuPc-based ***,statistics from an array of 6×6 photodetectors show little variation in their sensitivity and response time,and hence this in situ fabrication scheme will contribute to the implementation of on-chip integrated photodetectors with consistent performance based on bottom-up ***,this self-oriented growth provides a versatile option to achieve desired in-situ integrated functional devices based on bottom-up nanoribbons.

关键词： fluorinated copper phthalocyanine nanoribbon planar array photodetector in situ integration

Synthesis of New 7-O-Modified Chrysin Derivatives and Their Anti-proliferative and Apoptotic Effects on Human Gastric Carcinoma MGC-803 Cells

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Chemical Research in Chinese Universities 2014年第6期30卷 925-930页

作者： LIU Yunmei SONG Xiudao MA Jin HE Jun ZHENG Xing LEI Xiaoyong JIANG Guorong zhao zihao PAN Xia Institute of Pharmacy & Pharmacology University of South China Hengyang 421001 P. R. China Suzhou Academy of Wumen Chinese Medicine Suzhou Hospital of Traditional Chinese Medieine Suzhou 215003 P. R. China Soochow University Affiliated Children's Hospital Suzhou 215003 P. R. China Institute of Chemistry & Chemical Engineering University of South China Hengyang 421001 P. R. China

Two series of 7-O-modified chrysin derivatives were prepared from 7-O-carboxymethy! chrysin（2a）, 7-O-carboxypropylchrysin（2b） and short-chain alcohols by using 1-ethyl-3-（3-dimethylaminopropyl）carbodiimide hydrochloride（EDCI）, N-hydroxybenzotriazole（HOBt） and 4-dimethylamiopryidine（DMAP） as coupling reagents. Taking cisplatin as a reference substance, their anti-proliferative activities in vitro against human gastric carcinoma MGC-803 cells were evaluated by the standard 3-（4,5-dimethylthiazol-2-yl）-2,5-diphenyl-2H-tetrazolium bromide （MTT） method. The results show that among the compounds tested, hepty 4-（5-hydroxy-4-oxo-2-phenyl-4H- chromen-7-yloxy） acetate（3f） displayed the most potent growth-inhibitory effect on MGC-803 cells with half maximal inhibitory concentration（ICso） value of 3.23 pmol/L. The preliminary mechanism of inhibitory effect of compound 3f was also detected by flow cytometry（FCM）, and the compound exerted anti- cancer activity via inducing the apoptosis of MGC-803 cells in a dose dependent manner, which suggested that compound 3f would be a potential anti-cancer agent.

关键词： 7-O-Modified chrysin Anti-proliferative effect Apoptotic effect Flavanoid

Nanoengineered polypeptides from tetraphenylethylene-functionalized N-carboxyanhydride: Synthesis, self-assembly and intrinsic aggregation-induced emission

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Progress in Natural Science:Materials International 2021年第4期31卷 541-545页

作者： Xu Wang zihao zhao Tianrui Xue Zhengzhong Tan Ziyuan Song Shiqi Wei Yang Bo Ying Wang Jianjun Cheng Department of Materials Science and Engineering University of Illinois at Urbana-Champaign Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics) School of Pharmacy Tianjin Medical University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University

Ring-opening polymerization of N-carboxyanhydrides(NCAs) bearing pendant groups creates functional polypeptides. In this paper, we report the design, synthesis and polymerization of tetraphenylethylene(TPE)-modified NCA, which is used to incorporate aggregation-induced emission(AIE)-active segments into polypeptides. Specifically, we attempted the synthesis of amphiphilic methoxy poly(ethyleneglycol)-block-poly(γ-benzyl-L-glutamate)-block-poly(γ-4-(1,2,2-triphenylvinyl)benzyl-L-glutamate)(PEG-PBLG-PTPELG), which had well-controlled molecular weight and narrow polydispersity. The hydrophilic PEG and hydrophobic PBLG-PTPELG assembled into micelles in aqueous solution with diameter around 70 nm, displaying AIE at 480 nm. Our work demonstrates that the TPE-modified NCA is applicable for the preparation of the AIE-active polypeptides, integrating the AIE luminogens into the polypeptides which may offer unique opportunities for tuning AIE properties by adjusting the composition and conformation of polypeptides. We preliminarily explored the use of the amphiphilic polypeptides for the formulation of doxorubicin-containing micelles that can potentially be used for real-time monitoring of the nanomedicine distribution.

关键词： N-carboxyanhydride Ring-opening polymerization Polypeptide Micelle Aggregation-induced emission

Development of a Novel Feedforward Neural Network Model Based on Controllable Parameters for Predicting Effluent Total Nitrogen

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Engineering 2021年第2期7卷 195-202页

作者： zihao zhao zihao Wang Jialuo Yuan Jun Ma Zheling He Yilan Xu Xiaojia Shen Liang Zhu Institution of Environment Pollution Control and Treatment Department of Environmental EngineeringZhejiang UniversityHangzhou 310058China Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Hangzhou 310058China Zhejiang Provincial Engineering Laboratory of Water Pollution Control Hangzhou 310058China Haining Water Investment Group Co. Ltd.Haining 314400China Haining Capital Water Co. Ltd.Haining 31440China

The problem of effluent total nitrogen(TN)at most of the wastewater treatment plants(WWTPs)in China is important for meeting the related water quality standards,even under the condition of high energy *** achieve better prediction and control of effluent TN concentration,an efficient prediction model,based on controllable operation parameters,was constructed in a sequencing batch reactor *** with previous models,this model has two main characteristics:①Superficial gas velocity and anoxic time are controllable operation parameters and are selected as the main input parameters instead of dissolved oxygen to improve the model controllability,and②the model prediction accuracy is improved on the basis of a feedforward neural network(FFNN)with algorithm *** results demonstrated that the FFNN model was efficiently optimized by scaled conjugate gradient,and the performance was excellent compared with other models in terms of the correlation coefficient(R).The optimized FFNN model could provide an accurate prediction of effluent TN based on influent water parameters and key control *** study revealed the possible application of the optimized FFNN model for the efficient removal of pollutants and lower energy consumption at most of the WWTPs.

关键词： Feedforward neural network(FFNN) Algorithms Controllable operation parameters Sequencing batch reactor(SBR) Total nitrogen(TN)

明清之际的天学与天主教:汉语“天主教”一词的嬗变

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宗教学研究 2024年第4期 161-169页

作者：赵子豪浙江农林大学马克思主义学院

天主教入华后,耶稣会士罗明坚因“仿佛”称其为“天主教门”,利玛窦依附古儒“天学”提出“天主(公)教”,晚明清初士人则基于不同的西学认知参与天主教称谓的衍变。晚明奉教儒士因南京教案转以使用涵盖天主教与西学的“天学”,得到反教... 详细信息

天主教入华后,耶稣会士罗明坚因“仿佛”称其为“天主教门”,利玛窦依附古儒“天学”提出“天主(公)教”,晚明清初士人则基于不同的西学认知参与天主教称谓的衍变。晚明奉教儒士因南京教案转以使用涵盖天主教与西学的“天学”,得到反教者对整个天学的否定。清初士人因实学思潮接受作为西方天文历算之学的“天学”,以西学中源说接纳包含此天学的西学,因此唯独排斥他们凭理器论从中剥离出的天主教。随着礼仪之争的落幕,天主教只剩下“天主教”。

关键词：天主教天学西学罗明坚利玛窦