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IEEE Transactions on Signal and Power Integrity 2024年 3卷 110-125页

作者： Joo, Junho Commerou, daniel L. Huang, Hayden Yeh, Chun-Yi Kang, Jiaming Lin, Hank Tseng, Bin-Chyi Hwang, Chulsoon Missouri University of Science and Technology EMC Laboratory RollaMO65409 United States University of Southern Denmark Center for Industrial Electronics Sonderborg6400 Denmark ASUSTek Computer Inc. Advanced Electromagnetics and Wireless Communication R&D Center Taipei112019 Taiwan

This article analyzes different methods for modeling a buck regulator among the variety of voltage regulator modules from the perspective of power integrity and assesses the accuracy of power supply induced jitter (PSIJ) predictions for each buck regulator model. To compare the buck regulator modeling approaches, methods for conventional passive component modeling and behavior modeling are introduced. Four different buck regulator models are compared with measurements in terms of time-domain voltage ripple and nonlinearity. Then, each model is applied to a simulation-based system-level PSIJ prediction setup to quantify the accuracy of the buck regulator models from the perspective of PSIJ. A printed circuit board with an inverter chain powered by an external buck regulator is selected as the device under test. In the presence of power supply fluctuations due to load current injection on the buck regulator, the time interval error of the inverter is measured. The measured peak-to-peak jitter is then reproduced by various simulation setups with the different buck regulator modeling methods. Finally, the PSIJ simulation accuracy is investigated for each buck regulator model. © 2022 IEEE.

关键词： Jitter

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3rd Gen. rC-IGBT technology Contributing to a decarbonized Society

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and Systems 2024年第3期144卷 228-233页

作者： Soneda, Shinya Konishi, Kazuya Suzuki, Kenji Sakaguchi, Kosuke Furukawa, Akihiko Power Device Works Mitsubishi Electric Corporation 1-1-1 Imajukuhigashi Fukuoka Nishi-ku819-0192 Japan Advanced Technology R&D Center Mitsubishi Electric Corporation 8-1-1 Tsukaguchihonmachi Hyogo Amagasaki661-8661 Japan

In this paper, a newly developed 3rd Gen. rC-IGBT is presented. To reduce the power loss and improve the heat dissipation of rC-IGBTs, we introduced four approaches, controlling Gate-capacitances, thin wafer technique, high-density diode arrangement, and low carrier injection anode and cathode. The superior performance of the 3rd Gen. rC-IGBT is very promising for the carbon neutral. © 2024 The Institute of Electrical Engineers of Japan.

关键词： Buffer layers

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discovery of N-benzyl hydroxypyridone carboxamides as a novel and potent antiviral chemotype against human cytomegalovirus (HCMV)

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Acta Pharmaceutica Sinica B 2022年第4期12卷 1671-1684页

作者： Sameera Senaweera Tiffany C.Edwards Jayakanth Kankanala Yan Wang rajkumar Lalji Sahani Jiashu Xie robert J.Geraghty Zhengqiang Wang Center for Drug Design College of PharmacyUniversity of MinnesotaMinneapolisMN 55455USA Translational Medicine R&D Center Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Current drugs for treating human cytomegalovirus(HCMV)infections are limited by resistance and treatment-associated *** developing mechanistically novel HCMV antivirals,we discovered an N-benzyl hydroxypyridone carboxamide antiviral hit(8a)inhibiting HCMV in submicromolar *** describe herein the structure–activity relationship(SAr)for 8a,and the characterization of potent analogs for cytotoxicity/cytostatic property,the preliminary mechanism of action,and the absorption,distribution,metabolism and excretion(AdME)*** SAr revealed a few pharmacophore features conferring optimal antiviral profile,including the 5-OH,the N-1 benzyl,at least one–CH_(2)−in the linker,and a di-halogen substituted phenyl ring in the amide *** the end,we identified numerous analogs with sub-micromolar antiviral potency and good selectivity *** preliminary mechanism of action characterization used a pUL89-C biochemical endonuclease assay,a virus entry assay,a time-of-addition assay,and a compound withdrawal *** profiling measuring aqueous solubility,plasma and liver microsomal stability,and parallel artificial membrane permeability assay(PAMPA)permeability demonstrated largely favorable drug-like ***,these studies validate the N-benzyl hydroxypyridone carboxamide as a viable chemotype for potent and mechanistically distinct antivirals against HCMV.

关键词： Human cytomegalovirus N-Benzyl hydroxypyridone carboxamides Structureeactivity relationship Mechanism of action

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Analysis of Indium-Silver Alloy Thermal Interface Material reliability and Coverage degradation Mechanisms 26

Analysis of Indium-Silver Alloy Thermal Interface Material R...

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26th Electronics Packaging technology Conference, EPTC 2024

作者： Kong, MinJae Park, dongHyeon ree, Won Koo, YoungJun Bae, JoHyun Jeong, YeonKi Sohn, EunSook ryu, dongSu Park, dongJoo Park, Kyungrok Advanced Process & Material Project Global R&D center Amkor Technology Korea Inc. 150 Songdomirae-ro Yeonsu-gu Incheon21991 Korea Republic of

ISBN: (纸本)9798331522001

Thermal management of microprocessor chips has emerged as a critical issue to ensure high-power operation, especially in high-performance computing (HPC) applications such as artificial intelligence (AI). To effectively transfer the heat generated from the chip junction to the heat spreader or heat sink, the development of thermal interface materials (TIMs) with high thermal conductivity and the processes for applying them are very active in the electronics packaging industry. In general, polymer-based TIMs have been widely developed and used for their mechanical properties and process workability. However, due to the limitations of polymers, the thermal conductivity required for HPC applications cannot be satisfied. Indium (In) has been widely selected for high power consumption devices as a high dielectric constant (k) TIM due to its high thermal conductivity. However, the low liquidus point of In can be problematic for flip chip lidded ball grid array (FCLBGA) applications since indium may be re-melted during ball attachment reflow, which can reduce TIM coverage [3]. In this paper, indium-silver (InAg)-based alloys were evaluated to develop high thermal conductivity TIM solutions that can be applied to large body FCBGA devices and examines the reliability of indium-silver alloy TIMs under thermal cycling conditions. By varying the silver content, we investigated its impact on mechanical stability and TIM coverage degradation. Indium alloy with higher silver content showed reduced package warpage and fewer voids, as observed through Shadow moiré and SAT inspection. In contrast, Indium alloys with lower silver content exhibited more significant structural deformation and void formation Our findings suggest that increasing silver content in indium alloys enhances the TIM coverage and mechanical stability with better thermal performance. © 2024 IEEE.

关键词： Indium alloys

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A driver Fatigue Modeling Method Based on Enhanced EEG-EOG Fusion Network for Human-Machine Co-driving 4

A Driver Fatigue Modeling Method Based on Enhanced EEG-EOG F...

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4th International Signal Processing, Communications and Engineering Management Conference, ISPCEM 2024

作者： Wang, Yinan Zhao, Yang Gong, Lizhou Yu, Yewei Liu, Hanxu School of Automation Engineering University of Electronic Science and Technology of China Chengdu611731 China Global R&D Center China FAW Corporation Limited Changchun130013 China

ISBN: (纸本)9798331528676

driver fatigue detection serves as an essential tool in the process of human-machine co-driving, capable of promptly alerting intelligent systems to assume control of the vehicle. The detection of driver fatigue based on EEG signals currently stands as a primary method for assessing the mental state of individuals. However, at the same time, there are still some problems with EEG signals, such as being prone to noise interference and low cross-subject recognition rate. In addressing the aforementioned issues, this study introduces a method for modeling driver fatigue through the fusion of features extracted from EEG and EOG signals. The proposed model incorporates high-precision EEG equipment and good cross-subject EOG equipment as input. Comprising EEGNet, SANet (Spatial Attention Network), SCONV (and Separable Convolutional Network), the model employs a multi-modal approach to assess driver performance and quantify fatigue. The model effectiveness was verified on the SEEd-VIG data set. The test results show that the recognition accuracy of this method reaches 91%, which is better than the currently popular model. At the same time, the cross-subject recognition accuracy test was conducted, and the average accuracy reached 87%, which proved the generalization performance of the model across subjects and verified the effectiveness of the model. ©2024 IEEE.

关键词： Fluorescent screens

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FAILUrE ANALYSIS FOr LOCK SENSING LIMIT SWITCH ON EMU dOOr SYSTEM

FAILURE ANALYSIS FOR LOCK SENSING LIMIT SWITCH ON EMU DOOR S...

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ASME 2024 International Mechanical Engineering Congress and Exposition, IMECE 2024

作者： Wu, Lvxian Hong, Haifeng Zhang, Xiaoming Zhang, Long Lu, Hang Li, dong Yin, Yanbo Tang, Yuxuan Huang, Wei Chen, Qiubo The R&D Department CRRCMA QuincyMA02171 United States National Passenger Rail Vehicle Engineering and Technology Center CRRC-Changchun Jilin Changchun130062 China

ISBN: (纸本)9780791888681

The EMU plug sliding door system's security loop relies on two crucial components: the lock limit switch and the lock sensing limit switch, wired in series. Any malfunction in either switch during operation can disrupt the train's ability to initiate traction during berthing or induce emergency brake during revenue service, leading to operational issues, and impacting the service schedule and service life of the vehicle. Thus, ensuring the high-quality manufacture and precise installation of these limit switches is paramount. This paper focuses on the analysis of serval fault reports of the security loop. Upon inspection of current units, sporadic lock sensing limit switch malfunctions emerge as the primary cause of safety loop failures. Consequently, this paper aims to conduct an in-depth analysis of lock sensing limit switch failures on different train series, focusing on identifying the underlying issues and proposing practical solutions. Investigations and testing were conducted on actuation force, fitness of the components, and electrochemical oxidation to identify the root cause of the safety loop’s failure. A manufacturing defect was located and corrected significantly reducing the failure rate. Further correction, experience, and suggestions are provided for manufacturers and car builders. © 2024 by ASME.

关键词： Taxation

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A Zn-Cluster-Based MOF for Efficient Separation of C3H8/C2H6/CH4

Chem and Bio Engineering

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Chem and Bio Engineering 2024年第8期1卷 658-663页

作者： Wang, Yue Lai, Yujie Liu, Jieyu Fan, Ziwen Quan, Xueheng Zhang, Tong Wang, Changhong Xu, Cong Chen, Qi Niu, Zheng College of Chemistry Chemical Engineering and Materials Science Soochow University Jiangsu Suzhou215123 China Hebei Normal University Hebei Shijiazhuang050024 China Technology R&D Center Jinhong Gas Co. Ltd. Jiangsu Suzhou215143 China

The separation and purification of methane from natural gas are crucial chemical processes. Herein, we report a Zn-cluster-based MOF (SdMOF-3), enabling the efficient separation of mixed low-carbon alkanes. The unique Zn clusters in the MOF enhance its interaction with hydrogen atoms in alkanes, thus realizing the separation of saturated light alkanes. Single-component gas adsorption tests revealed that SdMOF-3 exhibits significantly higher affinity for C3H8 compared to CH4 and C2H6 at 298 K. dynamic column penetration experiments with mixed gases demonstrated the excellent separation performance of SdMOF-3 for separating C3H8 and C2H6 from CH4 © 2024 The Authors. Co-published by Zhejiang University and American Chemical Society.

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dESIGN, ANALYSIS ANd TEST OF TrUCK FrAME ANd BOLSTEr FOr rAILWAY VEHICLE

DESIGN, ANALYSIS AND TEST OF TRUCK FRAME AND BOLSTER FOR RAI...

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ASME 2024 International Mechanical Engineering Congress and Exposition, IMECE 2024

作者： Hong, Haifeng Xue, Shihai Zhang, Wenkang Zhang, Long Yin, Yanbo Wu, Lvxian Lu, Peng Chen, Qiubo National Passenger Rail Vehicle Engineering and Technology Center CRRC-Changchun Jilin Changchun130062 China The R&D Department CRRCMA QuincyMA02171 United States

ISBN: (纸本)9780791888681

In North American railway industry, the truck design generally takes into consideration of several factors, e.g. the axle load, maximum operating and design speed, new and worn wheel diameter, arrangement of journal box, service life, safety, stability, ride quality and maintainability and etc. and the design typically follows applicable FrA, APTA and AAr standards. To ensure the truck frame and bolster have enough strength for loads during testing and revenue services, FEA is used to calculate stresses in the frame and bolster for static and fatigue load cases. Various static loading cases as specified in EN standard were simulated to make sure that these stresses shall not exceed half of the yield stress. The fatigue stress calculation is based on cyclic loads, taking into consideration of forces experienced during vehicle accelerating and braking. Von-Mises stresses are calculated for static load cases. The modified Goodman line is solved for the endurance limit using the yield strength of the material. Finally, static and fatigue testing are performed to compare and validate the simulated results. © 2024 by ASME.

关键词： Fatigue testing

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Influence of initial extruded microstructures of Al-4.4Zn-1.4Mg alloy flat bar on VdA bendability

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Keikinzoku/Journal of Japan Institute of Light Metals 2023年第8期73卷 382-388页

作者： Kaharudin, Amalina Aina Saeki, ran Takaya, Mai Minoda, Tadashi Homma, Tomoyuki Department of Science of Technology Innovation Nagaoka University of Technology 1603-1 Kamitomiokacho Niigata Nagaoka-shi940-2188 Japan Department of Mechanical Engineering Nagaoka University of Technology Niigata Nagaoka-shi Japan R&D Center UACJ Corporation Aichi Nagoya-shi Japan

The bendability of extruded Al-4.4Zn-1.4Mg (mass%) alloy flat bars with 1.4 mm thickness having two types of microstructures which are fibrous and recrystallized is evaluated by a Verband der Automobilindustrie (VdA) bending test without pre-strain. The recrystallized specimen has better bendability than the fibrous one. The texture condition nearby the surfaces affects the VdA bendability the most. However, the microvoid formations also contribute in faster cracking phenomena during the load drop of the VdA bending test. © 2023 The Japan Institute of Light Metals.

关键词： Textures

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mtdNA-triggered pH response signal-amplified fluorescent probe for multiple cell discrimination

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Chinese Chemical Letters 2024年第3期35卷 363-368页

作者： Tianping Xia Yanxian Hou Zhuoran Xia Gengwen Chen Peichen Tang Jiangli Fan Xiaojun Peng State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart Materials Oriented Chemical EngineeringDalian University of TechnologyDalian 116024China Hematology Reagent R&D Department Mindray Bio-medical Electronics Co.Ltd.Shenzhen 518132China Research Institute of Dalian University of Technology in Shenzhen Shenzhen 518057China

developing fluorescence probes with multiple responses has vital significance but remains ***,for the first time,we present a mitochondrial dNA(mtdNA)-triggered pH response signalamplified fluorescent probe(QCY-dBT)for multiple cell *** probe exhibited a large stokes shift(229 nm),excellent dNA selectivity over rNA,and ultrasensitivity of detection limit(dL;74.0 ng/mL).Thus,QCY-dBT was successfully applied to analyze multiple human peripheral blood cells and visualize mtdNA in healthy and apoptotic *** the tumor acidic environment(pH 6.0–7.0),the absorbance of QCY-dBT at 436 nm increased,and the fluorescence signal(665 nm)was amplified by mtdNA,which enabled the direct observation of tumor *** study provides help in designing smart probes with multiple responses for efficient abnormal cell detection.

关键词： Fluorescence probe Mitochondrial dNA pH response Peripheral blood cells Multiple cell detection

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