检索结果-南通市图书馆

Robustness and breakup of the spiral wave in a two-dimensional lattice network of neurons

Science china(Physics,Mechanics & Astronomy) 2010年第4期53卷 672-679页

作者： MA Jun 1,2, TANG Jun 2 , ZHANG AiHua 3 & JIA Ya 2 1 department of Physics, Lanzhou university of Technology, Lanzhou 730050, china 2 department of Physics, central china normal university, wuhan 430079, china 3 College of Electrical and Information Engineering, Lanzhou university of Technology, Lanzhou 730050, china department of Physics Lanzhou University of Technology Lanzhou China department of Physics Central China Normal University Wuhan China College of Electrical and Information Engineering Lanzhou University of Technology Lanzhou China

The robustness and breakup of spiral wave in a two-dimensional lattice networks of neurons are investigated. The effect of small- world type connection is often simplified with local regular connection and the long-range connection with certain probability. The network effect on the development of spiral wave can be better described by local regular connection and changeable long-range connection probability than fixed long-range connection probability because the long-range probability could be changeable in realistic biological system. The effect from the changeable probability for long-range connection is simplified by multiplicative noise. At first, a stable rotating spiral wave is developed by using appropriate initial values, parameters and no-flux boundary conditions, and then the effect of networks is investigated. Extensive numerical studies show that spiral wave keeps its alive and robust when the intensity of multiplicative noise is below a certain threshold, otherwise, the breakup of spiral wave occurs. A statistical factor of synchronization in two-dimensional array is defined to study the phase transition of spiral wave by checking the membrane potentials of all neurons corresponding to the critical parameters(the intensity of noise or forcing current)in the curve for factor of synchronization. The Hindmarsh-Rose model is investigated, the Hodgkin-Huxley neuron model in the presence of the channel noise is also studied to check the model independence of our conclusions. And it is found that breakup of spiral wave is easier to be induced by the multiplicative noise in presence of channel noise.

关键词： spiral wave factor of synchronization breakup multiplicative noise robustness

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

NECESSARY CONDITIONS FOR OPTIMAL CONTROLS OF SEMILINEAR ELLIPTIC VARIATIONAL INEQUALITIES INVOLVING STATE CONSTRAINT

引用

Acta Mathematica Scientia 2005年第1期25卷 7-22页

作者：汪更生 department of Mathematics and the Center for Optimal Control and Discrete MathematicsHuazhong normal university Wuhan 430079 China Department of Mathematics Wuhan University Wuhan 430072 China

This paper deals with maximum principle for some optimal control problem governed by some elliptic variational inequalities. Some state constraints are discussed. The basic techniques used here are based on those in [... 详细信息

关键词： Variational inequality optimal control state constraint maximum principle

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on Green Residential Space Design

IJLAI Transactions on Science and Engineering

引用

IJLAI Transactions on Science and Engineering 2024年第1期2卷 32-37页

作者： Yu Jiang Shenyang normal university No.253 Huanghe North Street Shenyang 110034China

With the ever-changing nature,green ecology has become an international trend of ***,the green ecological design of residential space has become the main melody of people’s *** always implement the concept of ecological and environmental protection in the design process,attach importance to the ecological effect of residential space,carry out reasonable budget and use of environmentally friendly decorative materials,reduce the waste of materials,save money and save resources at the same time,and protect the *** the same time,people began to put their hopes on the residential space design,which made the green residential space design began to *** the bold exploration and practice of designers,the design of green residential space will be endowed with more distinctive characteristics and unique *** from the concept of green design,this paper explores the method of green space design through typical analysis.

关键词： Green Residential space Haze

来源：

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

The Cyclization Reactions of Lawesson's Reagent with Bifunctional Substrates

引用

Chinese Chemical Letters 1997年第9期8卷 751-754页

作者： Liang Nian HE Fei CAI Xiang Hua QIN Kai LI(Institute of Organic Synthesis, central china normal university, wuhan,430079) Istitute of Organic Synthesis Central China Normal University Wuhan 430079 China

The cyclizaion reactions of Lawesson's reagent(LR) with the substrates containing two functional groups such as hydroxy groups,amino groups, has been applied to prepare the O-P-O,N-P-N type 5-membered and 6-membered p... 详细信息

关键词： The Cyclization Reactions of Lawesson’s Reagent with Bifunctional Substrates

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Stereoselective Synthesis and Bioactivities of New ω-Azolyalkenes

引用

Chinese Chemical Letters 1998年第11期9卷 997-998页

作者： Shui Ming LU Wen Jing XIAO Wen Fang HUANG Tian Jie WU (Departmeent of Chemistry, central china normal university, wuhan, 430079)(Institute of Organic Systhesis, central china normal university, wuhan, 430079)(Center of Analysis and Testing, central Chi Departmeent of Chemistry Central China Normal University Wuhan 430079 China Institute of Organic Systhesis Central China Normal University Wuhan 430079 China Center of Analysis and Testing Central China Normal University Wuhan 430079 China

A series of new ω-azolylalkenes 3 were synthesized by N-alkylation of ffobromoalkenes 2 which were obtained by Witting reaction of ω-hydroxyalkylphosphonium bromide with aromatic aldehydes and subsequent bromination. The structures of products were confirmed by 1HNMR, IR,MS and elemental analysis. The preliminary bioassay indicated that some of them had high flingicidal activities.

关键词： Stereoselective synthesis ω-azolylalkenes fungicidal activities

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Littlewood-Paley operators with variable kernels

引用

Science china Mathematics 2006年第5期49卷 639-650页

作者： CHEN Jiecheng, DING Yong & FAN Dashan department of Mathematics, Zhejiang university (Xixi Campus), Hangzhou 310028, china School of Mathematical Sciences, Beijing normal university, Beijing 100875, china department of Mathematics, university of Wisconsin-Milwaukee, Milwaukee WI 53201, USA department of Mathematics, central china normal university, wuhan 430074, china department of Mathematics Zhejiang University (Xixi Campus) Hangzhou China School of Mathematical Sciences Beijing Normal University Beijing China department of Mathematics University of Wisconsin-Milwaukee Milwaukee USA department of Mathematics Central China Normal University Wuhan China

In this paper we study a certain directional Hilbert transform and the boundedness on some mixed norm spaces. As one of applications, we prove the Lp-boundedness of the Littlewood-Paley operators with variable kernels... 详细信息

关键词： directional Hilbert transform, Sobolev spaces, Littlewood-Paley operator,variable kernel.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Bifurcation of the Equatorial Periodic Orbit of the Planar Polynomial Vector Fields

引用

Acta Mathematica Sinica,English Series 2001年第3期17卷 471-480页

作者： Xin An ZHANG department of Mathematics,central china normal university,wuhan 430079,P.R.china Institute of Mathematics,Academy of Mathematics and System Sciences Chinese Academy of Sciences,Beijing 100080,P.R.china.Lan Sun CHEN Institute of Mathematics,Academy of Mathematics and System Sciences Chinese Academy Sciences,Beijing 100080,P.R.china.E-mail:lschen@math08.math.ac.cnZhao Jun LIANG department of Mathematics,central china normal university,wuhan 430079,P.R.china department of Mathematics Central China Normal University Wuhan 430079 P. R. China Institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 P. R. China Institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy Sciences Beijing 100080 P. R. China

In this paper,we have obtained the necessary and sufficient condition for the set of points at infinity on the plane R^2 to be a periodic orbit which is called an equatorial periodic orbit of a planar vector field X(x),and the formulae about the multiplicity of the equatorial periodic orbit of X(x).We have also proved that the main result of [9] is erroneous with regard to the formlae.

关键词： Poincaré map Bifurcation Orthogonal projection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

First Preparation and Reactivity of γ-Oxo Vinyliminophosphorane

引用

Chinese Chemical Letters 1997年第4期8卷 289-290页

作者： Ming Wu DING Wen Fau HUNG Hai Yang TO(Institute of Organic Synthesis,central china normal university,wuhan, 430070)Tian Jie WU(Center of Analysis and Testing,central china normal university,wuhan,430070) Institute of Organic Synthesis Central China Normal University Wuhan 430070 China Center of Analysis and Testing Central China Normal University Wuhan 430070 China

The γ-oxo vinyliminophosphorane 3 was prepared for the first time from the Staudinger reaction of vinyl azide 2 and triphenylphosphine. The reaedvity of 3 was studied

关键词： First Preparation and Reactivity of Oxo Vinyliminophosphorane

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Tests for nonparametric parts on partially linear single index models

引用

Science china Mathematics 2007年第3期50卷 439-449页

作者： Ri-quan ZHANG department of statistics, East china normal university, Shanghai 200062, china department of Mathematics, Shanxi Datong university, Datong 037009, china department of statistics East China Normal University Shanghai China department of Mathematics Shanxi Datong University Datong China

Tests for nonparametric parts on partially linear single index models are considered in this paper. Based on the estimates obtained by the local linear method, the generalized likelihood ratio tests for the models are established. Under the null hypotheses the normalized tests follow asymptotically the χ2-distribution with the scale constants and the degrees of freedom being independent of the nuisance parameters, which is called the Wilks phenomenon. A simulated example is used to evaluate the performances of the testing procedures empirically.

关键词： local linear method partially linear single index models generalized likelihood ratio test Wilks phenomenon χ 2-distribution 62G10 62G20

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

EXISTENCE OF GLOBAL SMOOTH SOLUTION TO INITIAL BOUNDARY VALUE PROBLEM FOR A VISCOELASTIC MODEL WITH RELAXATION

引用

Acta Mathematica Scientia 2004年第2期24卷 265-274页

作者：阮立志朱长江 LaboratoryofNonlinearAnalysis Dept.ofMath.CentralChinaNormalUniversityWuhan430079China

This paper is concerned with the initial boundary value problem for a viscoelastic model with relaxation. Under the only assumption that the C^0-norm of the initial data is small, without smallness hypothesis for the C^1-norm, the existence of the global smooth solution to the corresponding initial boundary value problem is proved. The analysis is based on some a priori estimates obtained by the 'maximum principle' of first-order quasilinear hyperbolic system.

关键词： Viscoelastic model relaxation a priori estimates maximum principle

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：