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Object-Oriented Design for FDTD Visual Scientific Computing

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journal of Systems Engineering and Electronics 2001年第3期12卷 71-75页

作者： dong, x. Wang, W. Wang, G. Electromagnetic and Commun. Lab. Sch. of Electronic and Info. Eng. Xi'an Jiaotong University Xi'an 710049 China

A scheme for general purposed FDTD visual scientific computing software is introduced in this paper using object-oriented design (OOD) method. By abstracting the parameters of FDTD grids to an individual class and separating from the iteration procedure, the visual software can be adapted to more comprehensive computing problems. Real-time gray degree graphic and wave curve of the results can be achieved using Directx technique. The special difference equation and data structure in dispersive medium are considered, and the peculiarity of parameters in perfectly matched layer are also discussed.

关键词： Computational methods Computer aided design Data structures Difference equations Finite difference method Iterative methods Natural sciences computing Object oriented programming Parameter estimation Three dimensional computer graphics Time domain analysis

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Ultrasonic-based surface patterning and interfacial reaction of ZrO_(2)ceramics

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journal of Materials Science & Technology 2023年第24期155卷 202-210页

作者： H.j. dong Z.L. Li x.G.Song j.C. Feng S.j. Wei j.H. Fu Y. Shi State Key Laboratory of Advanced Welding and joining Harbin Institute of Technology Harbin 150001 China Shandong Provincial Key Lab of Special Welding Technology Harbin Institute of Technology at Weihai Weihai 264209 China

We demonstrate a process to achieve selective surface metallization of ZrO_(2)ceramics using ultrasound technology in atmospheric environments at 350℃,which bestows good weldability of ZrO_(2)to achieve rapid and reliable connections with other metals as well as ceramic *** challenge is that brazing or diffusion welding processes to accomplish metallurgical connections for ZrO_(2) typically require holding at elevated temperatures for minutes to hours,while the selective ultrasonic metallization process requires only a few seconds of processing without the application of covering films or solder *** this study,the selected Sn-2Ti alloy could effectively wet and spread on ZrO_(2)substrate under ultrasonication,and continuous interphase layers were rapidly formed in situ between ZrO_(2)and *** bonding strength for the ZrO_(2)/Sn-2Ti interface was well established with the highest shear strength of 37.1 MPa,and the fracture location occurred at the filler *** interfacial reaction layer thickened remarkably with the prolongation of sonication,accompanied by the partial crystallization of amorphous TiO and the formation of irregularly striped Ti_(11.31)Sn_(3)O_(10)nanocrystals.

关键词： Selective ultrasonic metallization Zirconia surface patterning Low temperature connection Sono-oxidation Interfacial reaction

TRMT6 and TRMT61A facilitated acute pancreatitis severity via regulation of neutrophil function

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Science China Life Sciences 2025年

作者： Yuan dong Li Su Sin Man Lam Cen Yan Yalan Deng Guotao Lu jinkui Yang Guanghou Shui Yingmei Feng Beijing Institute of Hepatology Beijing Youan HospitalCapital Medical University Department of Science and Development Beijing Youan HospitalCapital Medical University Laboratory for Clinical Medicine Capital Medical University Neuroscience Research Institute Peking University Center of Medical and Health AnalysisPeking University State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of Sciences Pancreatic Center Department of GastroenterologyAffiliated Hospital of Yangzhou UniversityYangzhou University Beijing Key Laboratory of Diabetes Research and Care Department of EndocrinologyBeijing Tongren HospitalCapital Medical University

Dear Editor,Type 2 diabetes mellitus (T2DM) has been identified as a risk factor for increased severity in acute pancreatitis (AP)(Mikóet al,2018).However,to date,no studies have simultaneously included healthy individuals,T2DM patients,and AP patients to investigate which diabetes-associated metabolites are linked to AP severity.

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SOLIDIFICATION CHARACTERISTICS OF HIGHLYUNDERCOOLED Ag-Ge EUTECTIC ALLOYS

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Acta Metallurgica Sinica(English Letters) 1997年第2期10卷 93-98页

作者： C.x.dong x.Y.Luand B.B.Wei(Laboratory of Materials Sciencein Space, Northwestern Polytechnical University, xi’an 710072, China) Northwestern Polytechnical Univ Xi'an China

The Ag-Ge eutectic alloy system was intensively investigated with respect to its solidification characteristics at large undercoolings which were obtained by the B2O3 glass fluxing technique combined with argon protection. Grain size refinement was found in the Ag-15 wt% Ge hypoeuteciic alloy. With inereasing undercoolings the feather-like structure disappeared in the Ag-19wt% Ge eutectic alloy, and even silver slips showed up at sufficient undercoolings. Nevertheless, the fact that germanium had nucleated in preference to silver was indicated by a fine germanium line in the middle of the silver slips. The various morphologies of the germanium phase in the Ag-25 wt% Gehypereutectic alloy including the five-fold symmetry structure were explained by the joint action of high undercoolings (i.e. growth velocities) and density differences. The corpled zone of this alloy system was qualitatively estimated.

关键词： Ag-Ge alloys nucleation undercooling rapid solidification

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THERMODYNAMIC ExPLANATION OF LEADING PHASE IN PEARLITE TRANSFORMATION

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Acta Metallurgica Sinica(English Letters) 1997年第2期10卷 145-150页

作者： Liu, x.j. Guangdong Industrial Univ Guangzhou China

In this paper a concept of 'leading probability' is presented. The difference in the leading probability between ferrite and cementite depends mainly upon the difference between their driving forces at the beginning of precipitation. The results of theromdynamic calculations showed that the leading probability of cementite increased with the increase of carbon concentration of austenite, and the decrease in transformation temperature was favourable to cementite's being the leading nucleus during pearlite transformation.

关键词： leading phase pearlite transformation decomposition of austenite

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Temperature-insensitive micro-displacement sensor with spindle-shaped structure single mode fiber

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Optoelectronics Letters 2025年

作者： ZHANG Weihua MU jinlin WANG Hao WANG dong YU Haozheng TAO Yipeng Engineering Research Center of Optoelectronic Devices and Communication Technology，Ministry of Education， Tianjin Key Laboratory of Film Electronic and Communication Devices， School of Integrated Circuit Science and Engineering， Tianjin University of Technology Engineering Infrastructure Department，Autonomous Driving Department xiaomi EV Company Ltd

A temperature-insensitive micro-displacement sensor based on a spindle-shaped single mode fiber (SMF) is presented and demonstrated. The SMF is bent into a balloon-shaped SMF and burned into a spindle-shaped SMF by a flame. Due to the bending of the fiber， part of the incident light leaks from the fiber core into the fiber cladding， which excites higher order cladding modes. Therefore， modal interference occurs. The experimental results show that the maximum sensitivity of the sensors is -203 pm/μm when micro-displacement varies from 0 to 80 μm. The sensors are insensitive to temperature in the range of 20-70℃. In addition， the sensors have the advantages of simple structure， low cost， small volume， high sensitivity and stability， which can be widely used in numerous high-precision industrial measurements and civil engineering structure monitoring fields.

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Six-fold swelling expansion microscopy assisted cell painting for high-content phenotypic screening

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Optoelectronics Letters 2025年

作者： junfang xIE Yipeng dong jin WANG Zhichao DENG jianguo TIAN Qing YE Key Laboratory of Weak-Light Nonlinear Photonics， Ministry of Education， School of Physics and TEDA Applied Physics， Nankai University

Imaging-based phenotypic screening uses cellular phenotypes to describe the drug performance， which generally focuses on single cellular feature， lacking of a comprehensive characterization. Here， we propose a high content phenotypic screening method based on expansion microscopy (ExM) assisted Cell Painting， which enables multi-channel imaging with approximately 50 nm resolution. As a demonstration， we applied this method to a phenotypic screening involving five drugs. The morphological attributes of three subcellular structures were summarized to consist a “fingerprint” describing the drug effect. The proposed method can provide comprehensive and detailed clues for drug evaluation， enriching the content of phenotypic screening.

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One kind motion of controllable constrained Birkhoffian system:the absence of constraints

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Acta Mechanica Sinica 2020年第3期36卷 735-741页

作者： j.Chen F.x.Mei S.x.Liu Y.x.Guo School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China School of Physics Liaoning UniversityShenyang 110000China

This paper is devoted to discuss the motion of controllable constrained Birkhoffian system along with its absence of *** first step is to establish the autonomous and non-autonomous differential equations of motion of the system,based on Pfaff-Birkhoff ***,the existence of constraint multipliers are exhaustively ***,the definition of one kind motion of the system,called free motion,is given,which is described and analyzed by the absence of constraints that are determined by constraint *** 2 illustrates that one system can realize its free motion by selecting proper control *** particular,theorem 2 provides that one system can naturally realize free motion when we consider the integral of the unconstrained Birkhoffian system as the constraints of constrained Birkhoffian ***,the results obtained are illustrated by several examples.

关键词： Constrained Birkhoffian system Kinematic control Absence of constraint Free motion

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我国乙烯产业链发展现状及对策建议

现代化工 2025年第1期45卷 1-6页

作者：董雁春中石化(上海)石油化工研究院有限公司上海201208

在全球能源转型加速、环保标准日益严格、产业升级浪潮迭起以及我国供给侧结构改革深入实施的背景下,乙烯产业链正面临着巨大的变革和重塑。综述了乙烯产业链发展现状,并从政策、需求、供应3个方面分析了乙烯产业链发展趋势,随着“油转... 详细信息

在全球能源转型加速、环保标准日益严格、产业升级浪潮迭起以及我国供给侧结构改革深入实施的背景下,乙烯产业链正面临着巨大的变革和重塑。综述了乙烯产业链发展现状,并从政策、需求、供应3个方面分析了乙烯产业链发展趋势,随着“油转化”、炼化一体化的深入推进,产业供需格局已发生根本性转变,乙烯产业链总体向原料多元化(降低生产成本)、产品高端化(提升产品附加值)发展转型,上游乙烷/混合轻烃裂解法占比逐步提升,下游向聚烯烃弹性体(POE)、超高分子量聚乙烯(UHMWPE)、光伏级乙烯-醋酸乙烯酯共聚物(EVA)等高端化工材料延伸趋势明显。针对国内乙烯产业链转型升级,从产业布局、企业转型、科技创新、国际拓展4个方面提出了发展建议。

关键词：乙烯及其下游乙烯产业链原料高端聚乙烯