检索结果-南通市图书馆

Frontiers of Electrical and Electronic Engineering in China 2012年第1期7卷 32-48页

作者： wenlian lu Tianping CHEN Bo LIU Xiangnan HE School of Mathematical Sciences Fudan UniversityShanghai 200433China

The aim of this paper is to provide a sys- tematic review on the framework to analyze dynamics in recurrently connected neural networks with discontinu- ous right-hand sides with a focus on the authors＇ works in the past three years. The concept of the Filippov so- lution is employed to define the solution of the neural network systems by transforming them to differential in- clusions. The theory of viability provides a tool to study the existence and uniqueness of the solution and the Lya- punov function （functional） approach is used to investi- gate the global stability and synchronization. More pre- cisely, we prove that the diagonal-dominant conditions guarantee the existence, uniqueness, and stability of a general class of integro-differential equations with （al- most） periodic self-inhibitions, interconnection weights, inputs, and delays. This model is rather general and in- cludes the well-known Hopfield neural networks, Cohen- Grossberg neural networks, and cellular neural networks as special cases. We extend the absolute stability anal- ysis of gradient-like neural network model by relaxing the analytic constraints so that they can be employed to solve optimization problem with non-smooth cost func- tions. Furthermore, we study the global synchronization problem of a class of linearly coupled neural network with discontinuous right-hand sides.

关键词： delayed integro-differential system discontinuous activation ahnost periodic function nonsmooth cost function complete synchronization

Matrix-valued distributed stochastic optimization with constraints

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

信息与电子工程前沿:英文版 2023年第9期24卷 1239-1252页

作者： Zicong XIA Yang LIU wenlian lu Weihua GUI Key Laboratory of Intelligent Education Technology and Application of Zhejiang Province Zhejiang Normal UniversityJinhua 321004China School of Mathematical Sciences Zhejiang Normal UniversityJinhua 321004China School of Mathematical Sciences Fudan UniversityShanghai 200433China School of Automation Central South UniversityChangsha 410083China

In this paper,we address matrix-valued distributed stochastic optimization with inequality and equality constraints,where the objective function is a sum of multiple matrix-valued functions with stochastic variables and the considered problems are solved in a distributed manner.A penalty method is derived to deal with the constraints,and a selection principle is proposed for choosing feasible penalty functions and penalty gains.A distributed optimization algorithm based on the gossip model is developed for solving the stochastic optimization problem,and its convergence to the optimal solution is analyzed *** numerical examples are given to demonstrate the viability of the main results.

关键词： Distributed optimization Matrix-valued optimization Stochastic optimization Penalty method Gossip model

Establishing the community structure of signed interconnected graph in data

在线全文

学校读者我要写书评

暂无评论

Establishing the community structure of signed interconnecte...

Piperine regulates the circadian rhythms of hepatic clock gene expressions and gut microbiota in high-fat diet-induced obese rats

第36届中国控制会议

作者： wenlian lu Boyu Chen Zhongxiao Jin David Waxman Jianfeng Feng Key Laboratory of Education Ministry for Nonlinear Sciences and Shanghak Key Laboratory for Industrial Applied Mathematics School of Mathematical SciencesFudan University Brain Like AI Science and Technology Institute Fudan University SAIC Motor Corporation Limited Shanghai Center for Mathematical Sciences Fudan University

ISBN: (纸本)9781538629185

Graph communities can be an efficient and robust way to identify the clustering structure of data.A common scenario is the case that data matrix can be represented by graphs from instance and *** to associate the consistent community structure in the two data matrices from instance and attribute respectively are important for understanding the *** propose a novel and simple method to construct a interconnected network,by combining the instance and attribute graphs of the data as the interconnections between them,which unlike the bipartite graph cluster or the bicluster *** community structure can be detected with an extended Q-modularity algorithm that also takes negative weighted edges into consideration,where each community can contain both instances and attributes that provide the *** models are provided to illustrate the efficiency of the *** data of waste water treatment plants are treated by this method and the consistent community structure associated with day/measurements can be found.

关键词： Community Structure Interconnected graph Bi-clustering Data mining

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年第3期13卷 1617-1627页

作者： Weiyun Zhang Chi-Tang Ho wenlian Wei Jie Xiao Muwen lu Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods College of Food ScienceSouth China Agricultural UniversityGuangzhou 510642China Department of Food Science Rutgers UniversityNew Brunswick 08901USA

The interplay between the host circadian clock and microbiota has significant influences on host metabolism processes,and circadian desynchrony triggered by high-fat diet(HFD)is closely related to metabolic *** this study,the modulatory effects of piperine(PIP)on lipid metabolism homeostasis,gut microbiota community and circadian rhythm of hepatic clock gene expressions in obese rats were *** Sprague-Dawley(SD)rats were fed with normal diet(ND),HFD and HFD supplemented with PIP,*** 9 weeks,rats were sacrificed with tissue and fecal samples collected for circadian *** showed that chronic PIP administration ameliorated the obesity-induced alterations in lipid metabolism and dysregulation of hepatic clock gene expressions in obese *** gut microbial communities studied through 16S rRNA sequencing showed that PIP ameliorated the imbalanced nicrobiota and recovered the circadian rhythm of Lactobacillaceae,Desulfovibrionaceae,Paraprevotellaceae,and *** fecal metabolic profiles indicated that 3-dehydroshikimate,cytidine and lithocholyltaurine were altered,which were involved in the amino acid and fatty acid metabolism *** findings could provide theoretical basis for PIP to work as functional food to alleviate the lipid metabolism disorder,circadian rhythm misalignment,and gut microbiota dysbiosis with wide applications in the food and pharmaceutic industries.

关键词： Piperine Circadian clock Obesity Gut microbiota

On contraction and incremental stability of a class of switched Filippov systemsmytitlenote

在线全文

学校读者我要写书评

暂无评论

On contraction and incremental stability of a class of switc...

Classification and rating of disintegrated dolomite strata for slope stability analysis

第40届中国控制会议

作者： Yingying Lang wenlian lu the School of Mathematical Science Fudan University Shanghai Center for Mathematical Sciences Fudan University Shanghai Key Laboratory for Contemporary Applied Mathematics Fudan University

Stability analysis plays a central role in nonlinear dynamical systems, attached more and more importance due to its applications in real world control systems. In this paper, the contraction of the Filippov solutions of a class of switched dynamical systems is studied. By the uniform contraction of a sequence of continuous dynamical systems which approximate the switched Filippov systems in terms of the evolution map graphs, we derive sufficient conditions to guarantee that the solutions of switched Filippov systems exponentially converge to each other, namely incrementally stable. Several examples are presented and more applications of the derived theoretical results are explored afterwards.

关键词： Contraction Incremental Stability Exponential Convergence Switched Filippov Systems

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2552-2562页

作者： wenlian Liu Xinyue Gong Jiaxing Dong Hanhua Xu Peixuan Dai Shengwei Zhang Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co. Ltd.Kunming650051China Key Laboratory of Geotechnical Engineering and Geological Disasters of Yunnan Province Kunming650051China Faculty of Electric Power Engineering Kunming University of Science and TechnologyKunming650500China

Although disintegrated dolomite,widely distributed across the globe,has conventionally been a focus of research in underground engineering,the issue of slope stability issues in disintegrated dolomite strata is gaining increasing *** is primarily due to their unique properties,including low strength and loose *** methods for evaluating slope stability,such as basic quality(BQ)and slope stability probability classification(SSPC),do not adequately account for the poor integrity and structural fragmentation characteristic of disintegrated *** address this challenge,an analysis of the applicability of the limit equilibrium method(LEM),BQ,and SSPC methods was conducted on eight disintegrated dolomite slopes located in Baoshan,Southwest ***,conflicting results were ***,this paper introduces a novel method,SMRDDS,to provide rapid and accurate assessment of disintegrated dolomite slope *** method incorporates parameters such as disintegrated grade,joint state,groundwater conditions,and excavation *** findings reveal that six slopes exhibit stability,while two are considered partially ***,the proposed method demonstrates a closer match with the actual conditions and is more time-efficient compared with the BQ and SSPC ***,due to the limited research on disintegrated dolomite slopes,the results of the SMRDDS method tend to be conservative as a safety *** conclusion,the SMRDDS method can quickly evaluate the current situation of disintegrated dolomite slopes in the *** contributes significantly to disaster risk reduction for disintegrated dolomite slopes.

关键词： Disintegrated dolomite slope Basic quality(BQ) Slope stability probability classification (SSPC) Rock mass quality classification Limit equilibrium method(LEM)

人体步态分析系统──足底压力测量系统的研制

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国生物医学工程学报 2000年第1期19卷 32-40页

作者：韦启航陆文莲傅祖芸卢世璧中国科技大学研究生院北京100039 中国人民解放军总医院北京100853

根据人体步态分析的需求 ,我们设计并研制了一套体积小巧 ,功耗低 ,能实时测量 ,测量参数丰富 ,结果直观 ,人机界面友好的足底压力分布测量系统。系统的硬件包括由压力传感器阵列制成的鞋、信号调理单元、主电路单元三大部分。系统软件... 详细信息

根据人体步态分析的需求 ,我们设计并研制了一套体积小巧 ,功耗低 ,能实时测量 ,测量参数丰富 ,结果直观 ,人机界面友好的足底压力分布测量系统。系统的硬件包括由压力传感器阵列制成的鞋、信号调理单元、主电路单元三大部分。系统软件具有数据采集、文件管理、信号处理、步态特征参量提取及分析等多种功能。其图形丰富 ,操作简便 ,是一套人机界面友好的专用软件。此系统与三维运动子系统和三维测力台子系统可以共同组成一套完整的、功能齐全的人体步态分析系统。

关键词：步态分析生物力学步态压力测量脚压系统

在线全文

学校读者我要写书评

暂无评论

内燃动车组线缆EMC仿真与防护设计

电子测量技术 2021年第7期44卷 159-164页

作者：徐艺峰李常贤路文连大连交通大学电气信息工程学院大连116021 大连交通大学轨道交通装备国家地方联合工程研究中心大连116021

内燃动车组车下线缆众多、布线空间狭长,容易发生线间串扰故障。通过介绍车下布线情况,结合串扰理论,设计了一种降低线缆间串扰的屏蔽防护方案。在CST线缆工作室中对M车和T车下两种不同工况下建立线缆仿真模型,得出传感器线缆中的串扰... 详细信息

内燃动车组车下线缆众多、布线空间狭长,容易发生线间串扰故障。通过介绍车下布线情况,结合串扰理论,设计了一种降低线缆间串扰的屏蔽防护方案。在CST线缆工作室中对M车和T车下两种不同工况下建立线缆仿真模型,得出传感器线缆中的串扰电流、电压。通过仿真波形对比,加装屏蔽后的电流、电压相比未加屏蔽之前的串扰大幅降低,符合设备正常工作的误差范围内,验证了方案的有效性。同时对其他型号电力机车的布局布线有一定的工程参考价值。

关键词：内燃动车组串扰屏蔽布局布线电磁兼容

Using Event-Based Method to Estimate Cybersecurity Equilibrium

在线全文

学校读者我要写书评

暂无评论

自动化学报（英文版） 2021年第2期

作者： Zhaofeng Liu Ren Zheng wenlian lu Shouhuai Xu

来源：评论

学校读者我要写书评

暂无评论

对氢氧化亚铁制备实验的评析及再设计

化学教学 2024年第8期 81-84页

作者：杨茵龚文莲江苏省木渎高级中学苏州市吴中区教师发展中心江苏苏州215101

氢氧化亚铁制备的实验现象在不同版本教材中的描述有所不同。在梳理与剖析了相关文献资料后,发现其中对该实验原理的探究有一条循序渐进的主线,也有不少矫枉过正的改进方案,故对该实验进行了再探究。选用低浓度的NaOH试剂以确保安全与节... 详细信息

氢氧化亚铁制备的实验现象在不同版本教材中的描述有所不同。在梳理与剖析了相关文献资料后,发现其中对该实验原理的探究有一条循序渐进的主线,也有不少矫枉过正的改进方案,故对该实验进行了再探究。选用低浓度的NaOH试剂以确保安全与节约;改变教材上两种试剂的滴加顺序和滴加方法,利用烧碱溶液煮沸除去氧气后的余热来提升该实验的成功率;对出现红褐色的现象进行对照实验,发现将绿色沉淀转移到滤纸上,呈现红褐色更快,更便于观察。

关键词：氢氧化亚铁制备实验原理实验改进