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Ultrasonic Welding of Magnesium–Titanium Dissimilar Metals:A Study on Thermo-mechanical Analyses of Welding Process by Experimentation and Finite Element Method

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Chinese Journal of Mechanical engineering 2019年第6期32卷 181-191页

作者： Dewang Zhao Daxin Ren Kunmin Zhao Pan Sun Xinglin Guo Liming Liu School of Materials Science and engineering Dalian University of TechnologyDalian 116024China School of Automotive engineering Dalian University of TechnologyDalian 116024China Institute of Industrial and Equipment Technology Hefei University of TechnologyHefei 230601China shanghai Shipyard Co. Ltd.Shanghai 200000China Department of engineering Mechanics State Key Laboratory of Structural Analysis for Industrial EquipmentDalian University of TechnologyDalian 116024China

Ultrasonic welding is an effective ways to achieve a non-reactive/immiscible heterogeneous metal connection, such as the connection of magnesium alloy and titanium alloy. But the thermal mechanism of magnesium alloy/titanium alloy ultrasonic welding has not been defined clearly. In this paper, the experimental and the finite element analysis were adopted to study the thermal mechanism during welding. Through the test, the temperature variation law during the welding process is obtained, and the accuracy of the finite element model is verified. The microscopic analysis indicates that at the welding time of 0.5 s, the magnesium alloy in the center of the solder joint is partially melted and generates the liquid phase. Through the finite element analysis, the friction coefficient of the magnesium–titanium ultrasonic welding interface can be considered as an average constant value of 0.2.. The maximum temperature at the interface can exceed 600 ℃ to reach the melting point temperature of the magnesium alloy. The plastic deformation begins after 0.35 s and occurs at the magnesium side at the center of the interface.

关键词： Ultrasonic welding Magnesium alloys Titanium alloys Thermo-mechanical analyses Finite elementanalysis

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Enzymatic nitrous oxide emissions from wastewater treatment

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Frontiers of Environmental Science & engineering 2018年第1期12卷 113-124页

作者： Gang Guo Yayi Wang Tianwei Hao Di Wu Guang-Hao Chen Department of Civil ＆ Environmental engineering The Hong Kong University of Science and Technology Hong Kong 999077 China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China Institute for Advanced Study The Hong Kong University of Science and Technology Hong Kong 999077 China Hong Kong Branch of the Chinese national engineering Research {2. for Control ＆ Treatment of Heavy Metal Pollution The Hong Kong University of Science and Technology Hong Kong 999077 China Wastewater Treatment Laboratory FYT Graduate School The Hong Kong University of Science and Technology Guangzhou 511458 China

Nitrous oxide （N2.）, a potent greenhouse gas, is emitted during nitrogen rernoval in wastewater treatment, significantly contributing to greenhouse effect. Nitrogen removal generally involves nitrification and denitrification catalyzed by specific enzymes. N2. production and consumption vary considerably in response to specific enzyme-catalyzed nitrogen imbalances, but the mechanisms are not yet completely understood. Studying the regulation of related enzymes＂ activity is essential to minimize N2. emissions during wastewater treatment. This paper aims to review the poorly understood related enzymes that most commonly involved in producing and consuming N2. in terms of their nature, structure and catalytic mechanisms. The pathways of N2. emission during wastewater treatment are briefly introduced. The key environmental factors influencing N2. emission through regulatory enzymes are summarized and the enzyme-based mechanisms are revealed. Several enzyme- based techniques for mitigating N2. emissions directly or indirectly are proposed. Finally, areas for further research on N2. release during wastewater treatment are discussed.

关键词： Nitrous oxideMitigationEnzyme catalysisNitrogen removalWastewater treatment

Efficient potential-tuning strategy through p-type doping for designing cathodes with ultrahigh energy density

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national Science Review 2020年第11期7卷 1768-1775页

作者： Zhiqiang Wang Da Wang Zheyi Zou Tao Song Dixing Ni Zhenzhu Li Xuecheng Shao Wanjian Yin Yanchao Wang Wenwei Luo Musheng Wu Maxim Avdeev Bo Xu Siqi Shi Chuying Ouyang Liquan Chen Department of Physics Laboratory for Computational Materials PhysicsJiangxi Normal University State Key Laboratory of Advanced Special Steel School of Materials Science and Engineering Shanghai University Soochow Institute for Energy and Materials Innovations (SIEMIS) College of PhysicsOptoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow University State Key Lab of Superhard Materials College of Physics Jilin University Australian Nuclear Science and Technology Organisation School of Chemistry University of Sydney Materials Genome Institute Shanghai University Beijing national Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences

Designing new cathodes with high capacity and moderate potential is the key to breaking the energy density ceiling imposed by current intercalation chemistry on rechargeable batteries. The carbonaceous materials provide high capacities but their low potentials limit their application to anodes. Here, we show that Fermi level tuning by p-type doping can be an effective way of dramatically raising electrode potential. We demonstrate that Li（Na）BCF;/Li（Na）B;C;F;exhibit such change in Fermi level, enabling them to accommodate Li;（Na;） with capacities of 2.0–400（2.0–32.） m Ah g;at potentials of 3.4–3.7（2.7–2.9） V, delivering ultrahigh energy densities of 1000–1500 Wh kg;. This work presents a new strategy in tuning electrode potential through electronic band structure engineering.

关键词： p-type doping strategy electrochemical potential tuning Li(Na)BCF2.B2.2.2.cathodes ultrahigh energy densities

Integrated multi-scheme digital modulations of spoof surface plasmon polaritons

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Science China(Information Sciences) 2020年第10期63卷 123-132页

作者： Lepeng ZHANG Haochi ZHANG Min TANG Peihang HE Lingyun NIU Liangliang LIU Jiayuan LU Wenxuan TANG Junfa MAO Tiejun CUI State Key Laboratory of Millimeter Waves Southeast University Key Laboratory of Ministry of Education of China for Research of Design and Electromagnetic Compatibility of High Speed Electronic Systems Shanghai Jiao Tong University Research center of Applied Electromagnetics School of Electronic and Information EngineeringNanjing University of Information Science and Technology

The future wireless communications require different kinds of modulation functions to be integrated in a single intelligent device under different scenarios. Here, we propose a multi-scheme digital modulator to achieve this goal based on integrated spoof surface plasmon polaritons(SPP) in different frequency bands. By constructing switchable spoof SPP units, the propagating wave in the proposed spoof SPP waveguide can be manipulated in amplitude domain, frequency domain, and phase domain. As a proof of concept, the integrated multi-scheme digital modulator is experimentally verified to achieve at least three kinds of modulations, including amplitude shift keying, phase shift keying, and frequency shift keying, in a single digital spoof plasmonic waveguide. The simulated and measured results show that the modulator has excellent property of field confinement and is capable of frequency-domain modulation. Hence, the multi-scheme modulation property makes the proposed SPP digital modulator be an effective and reliable candidate for efficient manipulations of SPP waves and for advanced modulation technology.

关键词： spoof surface plasmon polaritons dynamic manipulation multi-scheme modulation dispersion engineering frequency modulation

Pseudotime Ordering Single-Cell Transcriptomic ofβCells Pancreatic Islets in Health and Type 2.Diabetes

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Phenomics 2021年第5期1卷 199-210页

作者： Kaixuan Bao Zhicheng Cui Hui Wang Hui Xiao Ting Li Xingxing Kong Tiemin Liu Human Phenome Institute Fudan University825 Zhangheng RoadShanghai 201203China State Key Laboratory of Genetic engineering School of Life Sciencesand Collaborative Innovation Center for Genetics and DevelopmentFudan UniversityShanghai 200438China shanghai Key Laboratory of Metabolic Remodeling and Health Institute of Metabolism and Integrative BiologyFudan UniversityShanghai 200433China Department of Endocrinology and Metabolism Zhongshan HospitalFudan UniversityShanghai 200032China

βcells are defined by the ability to produce and secret *** studies have evaluated that human pancreaticβcells are heterogeneous and demonstrated the transcript alterations ofβcell subpopulation in ***-cell RNA sequence(scRNA-seq)analysis helps us to refine the cell types signatures and understand the role of theβcells during metabolic challenges and ***,we construct the pseudotime trajectory ofβcells from publicly available scRNA-seq data in health and type 2.diabetes(T2.)based on highly dispersed and highly expressed genes using *** identified three major states including 1)Normal branch,2.Obesity-like branch and 3)T2.-like branch based on biomarker genes and genes that give rise to bifurcation in the trajectory.βcell function-maintain-related genes,insulin expression-related genes,and T2.-related genes enriched in three branches,*** pseudotime spectrum might suggest thatβcells transition among different *** application of pseudotime analysis is conducted to clarify the different cell states,providing novel insights into the pathology ofβcells in T2..

关键词： Single-cell RNA seq Islets βcell Pseudotime T2.

Analysis of characteristic functions for equivalent circuit model in monolithic transformer

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High Technology Letters 2012年第2期18卷 124-127页

作者：吴忠洁 Lu Jingxue Huang Fengyi Jiang Nan Institute of Information Science and engineering Southeast UniversityNanjing 210096P.R.China S-TEK Research center Aoya MicroeleclxonicsZhangjiang High-Tech ParkShanghai 201203P.R.China

A model of monolithic transformers is presented, which is analyzed with characteristic functions. A closed- form analytical approach to extract all the model parameters for the equivalent circuit of Si-based on-chip transformers is proposed. A novel de-coupling technique is first developed to reduce the complexity in the Y parameters for the transformer, and the model parameters can then be extracted analytically by a set of characteristic functions. Simulation based on the extracted parameters has been carried out for transformers with different structures, and good accuracy is obtained compared to a 3-demensional full-wave numerical electro- magnetic field solver. The presented approach will be very useful to provide a scalable and wide-band compact circuit model for Si-based RF transformers.

关键词： transformer parameter extraction compact model radio frequency integrate circuit((RFIC)

Associating liver partition and portal vein ligation for staged hepatectomy for colorectal liver metastasis:a single-center experience

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iLIVER 2022年第1期1卷 25-29页

作者： Yuanfei Peng Feiyu Chen Zheng Wang Xiaoying Wang Yinghong Shi Zhenbing Ding Yongsheng Xiao Kang Song Lei Yu Jie Hu Min Tang Zhaoyou Tang Jia Fan Jian Zhou Department of Liver Surgery and Transplantation Liver Cancer InstituteZhongshan HospitalFudan UniversityShanghaiChina Department of Radiology Zhongshan HospitalFudan UniversityShanghaiChina Institute of Biomedical Sciences Fudan UniversityShanghaiChina State Key Laboratory of Genetic engineering and Collaborative Innovation center for Genetics and Development School of Life SciencesFudan UniversityShanghaiChina shanghai Key Laboratory of Organ Transplantation ShanghaiChina Key Laboratory of Carcinogenesis and Cancer Invasion Ministry of EducationFudan UniversityShanghaiChina

Background:Associated liver partition and portal vein ligation for staged hepatectomy(ALPPS)is increasingly used for the treatment of primarily unresectable colorectal liver metastases(CRLM)because of the insufficient future liver remnant(FLR).The aim of this study was to share our experience with ALPPS for advanced CRLM and review the role of ALPPS in the management of patients with ***:Consecutive patients(n=10)with CRLM who underwent ALPPS at our center between December 2.14 and October 2.2. were retrospectively ***:The median age of patients was 58 years(range 49–70 years).Five patients had metachronous CRLM and the other 5 patients had synchronous *** patients had unilateral CRLM and the other 5 patients had bilateral *** patients previously underwent neoadjuvant *** FLR volume increased by 45.3%(35.8%–61.6%)over 14 days(range 7–2. days).The absolute and relative kinetic growth rates were 17.9 mL/day(range 7.5–32.1 mL/day)and 4.6%/day(range 2.3%–8.8%/day),*** morbidity rates were 2.%(2.10)and 40%(4/10)after ALPPS stage 1 and stage 2.*** 30-day and 90-day mortality rates were 0%and 10%,respectively.R0 resection was achieved for all patients,and the median disease-free survival was 18.7 ***:ALPPS is an effective treatment option for advanced *** enables rapid hypertrophy of the FLR and achieves a high R0 resection rate with an acceptable oncological ***,ALPPS should be reserved for selected patients because of its relatively high morbidity and mortality.

关键词： ALPPS Colorectal liver metastasis Future liver remnant

DBLiPro:A Database for Lipids and Proteins in Human Lipid Metabolism

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Phenomics 2023年第4期3卷 350-359页

作者： Qian Wu Yuanyuan Huang Xiangya Kong Ben Jia Xiaoting Lu Yunqin Chen Zechi Huang Yuan‑Yuan Li Wentao Dai NHC Key Laboratory of Reproduction Regulation&shanghai‑MOST Key Laboratory of Health and Disease Genomics Shanghai Institute for Biomedical and Pharmaceutical Technologies(SIBPT)Fudan UniversityNo.779Old Hu Min RoadShanghai 200237China Beijing Cloudna Technology Co. Ltd.No.53Yanqi StreetBeijing 100101China shanghai Key Laboratory of Gastric Neoplasms Department of General SurgeryShanghai Institute of Digestive SurgeryRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China shanghai engineering Research {2. of Pharmaceutical Translation Shanghai 201203China

To help researchers in the field of biology,medicine,chemistry,and materials science to use lipidomic data conveniently,there is an urgent need to develop a platform that provides a systematic knowledgebase of human lipid metabolism and lipidome-centric omics analysis *** is a user-friendly webserver allowing for access to human metabolism-related lipids and proteins knowledge database and an interactive bioinformatics integrative analysis workflow for lipidomics,transcriptomics,and proteomics *** DBLiPro,there are 3109 lipid-associated proteins(LAPs)and 2.98 lipid metabolites in the knowledge base section,which were obtained from Uniprot,Kyoto Encyclopedia of Genes and Genomes(KEGG)and were further annotated by information from other public resources in the knowledge base section,such as RaftProt and *** offers a step-by-step interactive analysis workflow for lipidomics,transcriptomics,proteomics,and their integrating multi-omics analysis focusing on the human lipid *** summary,DBLiPro is capable of helping users discover key molecules(lipids and proteins)in human lipid metabolism and investigate lipid–protein functions underlying mechanisms based on their own omics *** DBLiPro is freely available at http://*** ***/home.

关键词： Lipid-associated proteins Lipid Human lipid metabolism Database Omics

Characteristics of secondary droplets produced by the impact of drops onto a smooth surface

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Advances in Aerodynamics 2021年第1期3卷 623-634页

作者： Haixiang Zhang Ye Gao Xiwen Zhang Xian Yi Yanxia Du Feng He Zheyan Jin Pengfei Hao Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua University100084 BeijingChina Key Laboratory of Icing and Anti/De-Icing of Aerocraft China Aerodynamics Research and Development CenterSichuan 621000 MianyangChina School of Aerospace engineering and Applied Mechanics Tongji University200092 ShanghaiChina.

This work investigates the splashing behaviors of droplets impacting on solid surfaces and mainly focuses on the characteristics of secondary *** to the experimental results,two different splashing patterns,corona splash and levitating-lamella breakup,are observed.A new breakup mode,named rimsegmenting,is found during the levitating-lamella *** particular,the detailed information of the splashing secondary droplets,including the size,velocity,angle,and total volume of the splashing secondary droplets is obtained from the experimental *** size distribution of the splashing secondary droplets obeys the gamma distribution *** average diameter and splashing angle of the secondary droplets are mainly related to the Reynolds number Re,and can be expressed as functions of *** impact velocity and liquid viscosity will result in a wider size distribution range of splashing secondary *** also put forward an empirical model to predict the total splashing volume,which is consistent with the experimental data both in this work and previous *** work is believed to provide insights on the prediction of the characteristics of splashing secondary droplets.

关键词： Splashing Droplet Impact Secondary droplets