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Bayesian random Fourier filters for Gaussian noises

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Science china(Information Sciences) 2018年第12期61卷 214-216页

作者： Shiyuan WANG Wanli WANG Shukai DUAN Lidan WANG chi k.tse College of Electronic and Information Engineering Southwest University Chongqing key Laboratory of Nonlinear Circuits and Intelligent Information Processing Department of Electronic and Information Engineering Hong Kong Polytechnic University

Dear editor,Signal processing algorithms are generally used to identify an unknown system, and can be classified as batch algorithms and online learning algorithms(OLAs). Batch algorithms are applied to offline scenar... 详细信息

关键词： Bayesian random Fourier filters for Gaussian noises

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三相电压源型换流器故障耐受能力分析与评估

电力系统自动化 2016年第18期40卷 109-115页

作者：彭宇黄萌查晓明 chi k.tse 武汉大学电气工程学院湖北省武汉市430072 香港理工大学电子与资讯工程系

三相电压源型并网换流器由于含有大量电力电子开关器件及相应控制环节,是一种强非线性系统。在交直流混合系统中受到电网侧故障或直流侧负载变化等扰动影响,大容量换流器将产生复杂的响应行为,给电网带来难以预计的影响。文中考虑电网... 详细信息

三相电压源型并网换流器由于含有大量电力电子开关器件及相应控制环节,是一种强非线性系统。在交直流混合系统中受到电网侧故障或直流侧负载变化等扰动影响,大容量换流器将产生复杂的响应行为,给电网带来难以预计的影响。文中考虑电网中三相电压暂降的典型故障,基于平均模型分析了三相电压源型换流器电流环的非线性特性。在此基础上,根据李雅普诺夫稳定性判据分析了故障前后换流器的稳定性,并以故障深度和故障持续时间为指标对换流器故障耐受能力进行评估。最后,通过并网系统的逐周期仿真验证了理论分析和计算的有效性。

关键词：并网换流器非线性分析李雅普诺夫稳定性故障耐受能力

Adaptive synchronization between two complex networks with nonidentical topological structures

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Adaptive synchronization between two complex networks with n...

第四届全国网络科学学术论坛暨研究生暑期学校

作者： chi k.tse Department of Electronic and Information Engineering Hong Kong Polytechnic University

＜正＞This paper addresses the theoretical analysis of synchronization between two complex networks with nonideatical topological *** designing effective sdaptive controllers,we achieve synchronisation between two complex *** the cases of identical and nonidentical network topological structures are considered and several useful critaris for synchronization are *** examples are precented to demonstrste the applucation of the of the theoretical results.

关键词： synchronization complex network topological structure

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S/SP非接触谐振变换器的时域特性分析

中国电机工程学报 2015年第8期35卷 1983-1992页

作者：侯佳陈乾宏任小永阮新波 Siu-Chung Wong chi k.tse 江苏省新能源发电与电能变换重点实验室(南京航空航天大学自动化学院) 江苏省南京市210016 香港理工大学电子及资讯工程系

S/SP非接触谐振变换器因为对系统参数变化尤其是变压器的耦合系数变化不太敏感,具有良好的应用前景。但该变换器中主要波形谐波含量较大,导致基波分析方法误差较大,直接影响到变换器的参数设计以及控制的有效性。为此论文对变换器的时... 详细信息

S/SP非接触谐振变换器因为对系统参数变化尤其是变压器的耦合系数变化不太敏感,具有良好的应用前景。但该变换器中主要波形谐波含量较大,导致基波分析方法误差较大,直接影响到变换器的参数设计以及控制的有效性。为此论文对变换器的时域特性展开研究。论文考虑谐波影响,推导谐振网络的通用等效电路,揭示谐波产生的原因,建立谐振腔各波形的定量表达式。在时域波形分析的基础上,论文进一步研究变换器的输出增益特性,推导精确的电压增益并指出基波分析方法结果偏大的原因。最后,设计一台1.5 k W的S/SP非接触谐振变换器,特征波形、电压增益的实验与分析结果吻合良好,验证了论文所采用的时域特性分析方法的正确性。

关键词：非接触电能传输时域特性分析输出电压增益串/串并(S/SP)补偿谐振变换器

错位条件下基于“感应盲点”分析的非接触变压器建模及优化

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电力系统自动化 2017年第2期41卷 15-20,120页

作者：柯光洁陈乾宏徐立刚 Siu-Chung WONG chi k.tse 南京航空航天大学江苏省南京市210016 香港理工大学电子及资讯工程系

感应式无线电能传输系统中,非接触变压器存在错位等多种工况,引起耦合系数等参数大范围变化,影响系统特性。为了建立错位条件下非接触变压器的耦合系数模型,文中基于场路结合的分析方法,分析磁通耦合特性,给出了非接触变压器的"感应盲点... 详细信息

感应式无线电能传输系统中,非接触变压器存在错位等多种工况,引起耦合系数等参数大范围变化,影响系统特性。为了建立错位条件下非接触变压器的耦合系数模型,文中基于场路结合的分析方法,分析磁通耦合特性,给出了非接触变压器的"感应盲点"求解方法;并结合其耦合系数的变化规律,建立非接触变压器错位条件下耦合系数的计算模型。基于磁场分布的特点,进一步提出副边多绕组的新型非接触变压器结构。采用优化后的变压器结构,设计制作了60 W输出的非接触变换器,耦合系数的计算结果和实际测试结果一致,证明了所提"感应盲点"分析方法与耦合系数计算模型的正确性,验证了优化后的新型非接触变压器具有良好的错位自适应能力。

关键词：无线电能传输感应盲点耦合系数模型非接触变压器

PWM+PLL控制人工心脏用非接触变换器的研究

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PWM+PLL控制人工心脏用非接触变换器的研究

Study on co-occurrence character networks from chinese essays in different periods

2008中国电工技术学会电力电子学会第十一届学术年会

作者：张巍曹玲玲陈乾宏 SC Wang chi k.tse 南京航空航天大学自动化学院香港理工大学

人体植入式非接触变压器的原边和副边完全分开,分别位于病人的体外和体内。变压器气隙很大,漏感大,激磁电感小,必须利用谐振效应,补偿漏感及激磁电感,提高电压传输比并减小环流损耗。与其它非接触变换器不同,由于病患的个体差异、呼吸... 详细信息

人体植入式非接触变压器的原边和副边完全分开,分别位于病人的体外和体内。变压器气隙很大,漏感大,激磁电感小,必须利用谐振效应,补偿漏感及激磁电感,提高电压传输比并减小环流损耗。与其它非接触变换器不同,由于病患的个体差异、呼吸及运动等原因,变压器原副边间的气隙并不固定,耦合系数、漏感及激磁电感等参数不断变化,必须针对变参数场合引入有效的控制策略。本文研究了原副边串联补偿的谐振变换器的工作原理,分析了其频域和时域特性,并提出了脉宽调制（PWM）同锁相控制（PLL）相结合的控制策略,利用PWM-PLL控制使变换器在低压满载时工作在输出电压传输比与负载无关的频率点附近,适应于植入式变换器变参数的特点。最后基于这种控制方法完成了原理样机的制作,并使其能够在变输入电压,变负载以及变气隙的条件下可靠高效工作。

关键词：非接触式变换器谐振锁相环 PWM控制

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Science china(Information Sciences) 2012年第11期55卷 2417-2427页

作者： tse chi k Department of Electronic and Information Engineering Hong Kong Polytechnic University

Co-occurrence networks of chinese characters are constructed from collections of essays in different periods of china:the ancient chinese language,the chinese language in Wei,Jin,and Southern-Northern Dynasties,the recent chinese language,and the modern chinese language,and their statistical parameters are *** has been found that 99.6% networks have the scale-free feature and 95.0% networks have the smallworld e?*** study reveals some commonalities and di?erences among articles in different periods of china from a complex network *** has been a controversial question as to whether the literatures in Wei,Jin,and Southern-Northern Dynasties should belong to the ancient chinese language or the recent chinese language in the linguistic *** work shows that the statistical parameters of networks in Wei,Jin,and Southern-Northern Dynasties are clearly different from those of networks in the other periods of china,and it seems more reasonable that the literatures in Wei,Jin,and Southern-Northern Dynasties belong to the recent chinese language.

关键词： chinese language essay co-occurrence character network small-world scale-free

Neurodynamics analysis of brain information transmission

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Applied Mathematics and Mechanics(English Edition) 2009年第11期30卷 1415-1428页

作者：王如彬张志康 chi k. tse Institute for Cognitive Neurodynamics School of Information Science and EngineeringEast China University of Science and Technology Institute for Cognitive Neurodynamics School of Information Science and EngineeringEast China University of Science and Technology Department of Electronic and Information Engineering The Hong Kong Polytechnic UniversityKowloon

This paper proposes a model of neural networks consisting of populations of perceptive neurons, inter-neurons, and motor neurons according to the theory of stochastic phase resetting dynamics. According to this model, the dynamical characteristics of neural networks are studied in three coupling cases, namely, series and parallel coupling, series coupling, and unilateral coupling. The results show that the indentified structure of neural networks enables the basic characteristics of neural information processing to be described in terms of the actions of both the optional motor and the reflected motor. The excitation of local neural networks is caused by the action of the optional motor. In particular, the excitation of the neural population caused by the action of the optional motor in the motor cortex is larger than that caused by the action of the reflected motor. This phenomenon indicates that there are more neurons participating in the neural information processing and the excited synchronization motion under the action of the optional motor.

关键词： serial and parallel model of neural networks phase coding synchronousmotion perception neuron inter-neuron motor neuron population of neural oscillators

Understanding the role of PIN1 in hepatocellular carcinoma

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World Journal of Gastroenterology 2016年第45期22卷 9921-9932页

作者： chi-Wai Cheng ka-Wai Leong Eric tse Department of Medicine The University of Hong Kong Queen Mary Hospital

PIN1 is a peptidyl-prolyl cis/trans isomerase that binds and catalyses isomerization of the specific motif comprising a phosphorylated serine or threonine residue preceding a proline(p Ser/Thr-Pro) in proteins. PIN1 can therefore induce conformational and functional changes of its interacting proteins that are regulated by proline-directed serine/threonine phosphorylation. Through this phosphorylation-dependent prolyl isomerization, PIN1 fine-tunes the functions of key phosphoproteins(e.g., cyclin D1, survivin, β-catenin and x-protein of hepatitis B virus) that are involved in the regulation of cell cycle progression, apoptosis, proliferation and oncogenic transformation. PIN1 has been found to be over-expressed in many cancers, including human hepatocellular carcinoma(HCC). It has been shown previously that overexpression of PIN1 contributes to the development of HCC invitro and in xenograft mouse model. In this review, we first discussed the aberrant transcription factor expression, miR NAs dysregulation, PIN1 gene promoter polymorphisms and phosphorylation of PIN1 as potential mechanisms underlying PIN1 overexpression in cancers. Furthermore, we also examined the role of PIN1 in HCC tumourigenesis by reviewing the interactions between PIN1 and various cellular and viral proteins that are involved in β-catenin, NOTCH, and PI3k/Akt/mT OR pathways, apoptosis, angiogenesis and epithelial-mesenchymal transition. Finally, the potential of PIN1 inhibitors as an anti-cancer therapy was explored and discussed.

关键词： Phosphorylation Hepatocellular carcinoma PIN1 Isomerization Hepatocarcinogenesis