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Numerical simulation of solidification morphologies of Cu-0.6Cr casting alloy using.modified cellular automaton model

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Transactions of Nonferrous Metals Society of China 2010年第6期20卷 1072-1077页

作者： TSAI De-chang HWANG Weng-sing Department of Materials Science and Engineering National Cheng Kung University

The purpose of this study is to predict the morphologies in the solidification process for Cu-0.6Cr(mass fraction,%)alloy by vacuum continuous casting(VCC)and verify its accuracy by the observed experimental *** numerical simulation aspect, finite difference(FD)method and modified cellular automaton(MCA)model were used to simulate the macro-temperature field, micro-concentration field,nucleation and grain growth of Cu-0.6Cr alloy using.real data from actual casting *** the observed casting experiment,the preliminary grain morphologies are the directional columnar grains by the VCC *** solidification morphologies by MCAFD model are in agreement with the result of actual casting experiment well.

关键词： Cu-Cr alloy vacuum continuous casting solidification morphology simulation modified cellular automaton model finite difference method

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Robust disturbance attenuation for uncertain nonlinear networked control systems

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控制理论与应用（英文版） 2010年第1期8卷 40-51页

作者： sing.Kiong NGUANG Department of Electrical and Computer Engineering University of Auckland

This paper considers the problem of robust disturbance attenuation for a class of uncertain nonlinear networked control systems. Takagi-Sugeno fuzzy models are firstly employed to describe the nonlinear plant. Markov processes are used to model the random network-induced delays and data packet dropouts. The Lyapunov-Razumikhin method has been used to derive such a controller for this class of nonlinear systems such that it is stochastically stabilizable with a disturbance attenuation level. Sufficient conditions for the existence of such a controller are derived in terms of the solvability of bilinear matrix inequalities. An iterative algorithm is proposed to change this non-convex problem into quasi-convex optimization problems, which can be solved effectively by available mathematical tools. The effectiveness of the proposed design methodology is verified by a numerical example.

关键词： Networked control system Takagi-Sugeno fuzzy model Robust disturbance attenuation

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Fundamental Understanding and Optimization Strategies for Dual‑Ion Batteries:A Review

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Nano-Micro Letters 2023年第8期15卷 205-224页

作者： Chong Chen Chun‑sing.Lee Yongbing Tang Advanced Energy Storage Technology Research Center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Center of Super‑Diamond and Advanced Film(COSDAF) City University of Hong KongKowloon 999077Hong KongSARPeople’s Republic of China

There has been increasing.demand for high-energy density and longcycle life rechargeable batteries to satisfy the ever-growing requirements for nextgeneration energy storage *** all available candidates,dual-ion batteries(DIBs)have drawn tremendous attention in the past few years from both academic and industrial battery communities because of their fascinating advantages of high working voltage,excellent safety,and environmental ***,the dynamic imbalance between the electrodes and the mismatch of traditional electrolyte systems remain *** fully employ the advantages of DIBs,the overall optimization of anode materials,cathode materials,and compatible electrolyte systems is urgently ***,we review the development history and the reaction mechanisms involved in ***,the optimization strategies toward DIB materials and electrolytes are *** addition,their energy-related applications are also ***,the research challenges and possible development directions of DIBs are outlined.

关键词： Dual-ion batteries Reaction mechanisms Optimization strategies Energy storage

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过套管电阻率测井：二维和三维失真及校正技术

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测井科技 1996年第4期 46-55页

作者： sing.,BS 徐飒

最近几年，过套管电阻率测量证实了由Ａｌｐｉｎ（１９３９）提出并得到Ｋａｕｆｍａｎ（１９９０）和Ｖａｉｌ（１９９１）确认和完善的一种独特的构想。一种工业用测井仪器已能用来监测生产井、控制注水以及寻找在废弃井和生产井中的... 详细信息

最近几年，过套管电阻率测量证实了由Ａｌｐｉｎ（１９３９）提出并得到Ｋａｕｆｍａｎ（１９９０）和Ｖａｉｌ（１９９１）确认和完善的一种独特的构想。一种工业用测井仪器已能用来监测生产井、控制注水以及寻找在废弃井和生产井中的死油气。这项具有广阔潜在市场的新技术鼓舞了许多作者去研究它的可能性和局限性。过套管电阻率测量技术有几个困难。信号电平一般在ｎＶ范围内，用直流电仪器记录如此的信号有困难。

关键词：电阻率测井过套管电阻率二维三维失真校正

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