检索结果-南通市图书馆

Speed selection of traveling waves to an epidemic model

International Journal of Biomathematics 2023年第4期16卷 155-173页

作者： Yahui Wang Xinjian Wang Guo Lin School of Mathematics and Statistics Lanzhou University LanzhouGansu 730000P.R.China

This paper is devoted to investigating the selection mechanism of the minimal wave speed for traveling waves to an epidemic *** determinacy of linear and nonlinear selections is further discussed by the upper-lower solutions and comparison principle.A threshold is defined by the eigenvalue problem of the linearized *** show that the nonlinear determinacy is obtained as long as there exists a lower solution with a faster decay and a speed parameter that is larger than the *** the speed parameter equals to the threshold,if there exists an upper solution satisfying proper limit behavior,then the linear selection is *** a special function of infection rate,we obtain a threshold parameter that determines the linear and nonlinear selections.

关键词： cooperative system minimal wave speed linear determinacy nonlinear selection comparison principle

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

cooperative Communication Based on Spectrum Aggregation in LTE Further Evolution

引用

ZTE Communications 2010年第1期8卷 44-49页

作者： Diao Xinxi Xu Ling Ma Zhifeng Standard Development ＆ Industrial Relation Department Products and Marketing System of ZTE Corporation Shenzhen 518004 P. R. China

The implementation of wide band radio transmission may occur in two parallel ways： designing a new system with larger bandwidth, or constructing a cooperative system based on existing systems. The former is a spectrum aggregation scheme based on multi-carrier transmission within one system, while the latter fulfills spectrum aggregation based on multi-carrier transmission among systems. On the one hand, the advantage of the multi-carrier transmission scheme within a system and among systems is that the existing Radio Frequency （RF） techniques and elements can be sufficiently utilized, so system costs can be decreased. On the other hand, spectrum aggregation among systems, especially among heterogeneous air-interfaces, can not only expand the basic bandwidth functions, but also fulfill efficient spectrum usage for Frequency Division Duplex （FDD） system under the unbalanced Uplink/Downlink （UL/DL） service scenario. It can also efficiently guard band usage between FDD and Time Division Duplex （TDD） systems. Commercially, this has significant implications for operators.

关键词： Based cooperative system Radio Frequency based implementation Time Division implications significant usage techniques especially wide band hand elements service FDD two TDD new air

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

Network Coding Cooperation Performance Analysis in Wireless Network over a Lossy Channel, M Users and a Destination Scenario

引用

Communications and Network 2016年第4期8卷 257-280页

作者： Mohamed El-Hihi Hani Attar Ahmed A. A. Solyman Lina Stankovic Department of Electronic and Electrical Engineering Philadelphia University Amman Jordan The Military Technical Research Center Cairo Egypt Department of Electronic and Electrical Engineering University of Strathclyde Glasgow UK

Network coding (NC), introduced at the turn of the century, enables nodes in a network to combine data algebraically before either sending or forwarding them. Random network coding has gained popularity over the years by combining the received packet randomly before forwarding them, resulting in a complex Jordan Gaussian Elimination (JGE) decoding process. The effectiveness of random NC is through cooperation among nodes. In this paper, we propose a simple, low-complexity cooperative protocol that exploits NC in a deterministic manner resulting in improved diversity, data rate, and less complex JGE decoding process. The proposed system is applied over a lossy wireless network. The scenario under investigation is as follows: M users must send their information to a common destination D and to exchange the information between each others, over erasure channels;typically the channels between the users and the destination are worse than the channels between users. It is possible to significantly reduce the traffic among users and destination, achieving significant bandwidth savings, by combining packets from different users in simple, deterministic ways without resorting to extensive header information before being forwarded to the destination and the M users. The key problem we try to address is how to efficiently combine the packets at each user while exploiting user cooperation and the probability of successfully recovering information from all users at D with k system to retrieve the lost packets rather than asking for ARQ, resulting in improved data flow, and less power consumption. In fa

关键词： Network Coding cooperative system Erasure Channel Diversity

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

Stability Analysis of Cooperation system of Two Robot Arms

Stability Analysis of Cooperation System of Two Robot Arms

引用

第二十九届中国控制会议

作者： CHEN Yunlan1,2,XU Genqi1 1.Department of Mathematics,Tianjin University,Tianjin 300072,P.R.China2.Department of Automation,Tianjin University,Tianjin 300072,P.R.China

In this paper we study the stability problem of a hybrid system composed of two robots,where the appropriate cooperation of robots are expected to work *** performance of system depends directly upon one main factor:the coordination movement of the *** stability analysis of the system results in a model of uniform Euler-Bernoulli beams with linear and non-collocated boundary feedback *** prove that the system is exponentially stable with suitable choice of parameters of the *** particular,we show that the system satisfies the spectrum determine growth condition.

关键词： Robot Arms cooperative system Euler-Bernoulli Beam Non-collocated Control Riesz Basis Exponential Stabil-ity

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

Stochastic Process Model of the Multi-UAVs Collaborative system Based on State Transition

Stochastic Process Model of the Multi-UAVs Collaborative Sys...

引用

4th International Conference on Modelling,Identification and Control(ICMIC 2012)

作者： Bing Li is with the (1).School of Mechatronic Engineering, Beijing Institute of Technology, Beijing 100081 China (2). Department of mathematics Hunan Institute of Humanities Science and Technology Loudi, Hunan 417000 China RuiZhi Mao is with the School of Mechatronic Engineering, Beijing Institute of Technology Beijing 100081 China XiaoDong Yuan is with the School of Mechatronic Engineering, Beijing Institute of Technology Beijing 100081 China Jie Li is with the School of Mechatronic Engineering, Beijing Institute of Technology Beijing 100081 China TingZhao Yi is with the Hu Bei Han Dan Mechatronics Co.LtD Xiang Yang 441021 China

Because of the enhancement of micro UAV's ability of autonomous decision as well as the continuous improvement of network data link, cooperation between multiple UAVs is made possible, In order to research the Multi-UAVs' cooperative system , This article, starting with the tactical level, tries to establish a general framework about conscious cooperation of a group of UAVs, So the paper studies the status of Multi-UAVs cooperative system under the information network, and establishes a mathematical model of cooperative system using Stochastic Process and Probability Analysis, and proposes the uniqueness and Controllability theorem for system solutions existence. The example results show that the method is reasonable.

关键词： cooperative system Stochastic Process Controllability theorem

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

股份合作制：一种过渡性的企业制度

引用

社会主义经济理论与实践 2000年第7期 49-57页

作者：余文建陈躬林

股份合作制被认为是乡镇企业以及国有中小型企业改革的目标模式，但股份合作制存在着决策权平等原则与风险分配不平等之间的矛盾，存在着搭便车等行为，因而股份合作制只能是一种过渡性企业制度，其发展方向是股份制企业。

关键词：企业制度股份制合作制 enterprise system share-holding system cooperative system

来源：人大复印报刊资料评论

在线全文

人大复印报刊资料

学校读者我要写书评

暂无评论

合作与不合作的政治经济学分析

引用

农业经济导刊 2006年第5期

作者：张永丽赵锋姚华

农民经济组织是小农家庭进入市场的桥梁和纽带，是在农民与国家、政府、市场等多种力量的博弈中产生和发展起来的。农民经济组织演进的路径、组织形式、发展规模和速度受到并将继续受到市场激励与要求、政府约束与支持、农村制度安排与... 详细信息

农民经济组织是小农家庭进入市场的桥梁和纽带，是在农民与国家、政府、市场等多种力量的博弈中产生和发展起来的。农民经济组织演进的路径、组织形式、发展规模和速度受到并将继续受到市场激励与要求、政府约束与支持、农村制度安排与宏观社会经济环境等多种因素的影响。因此，农民经济组织的发展对进一步深化我国农村政治经济体制改革提出了新的要求。

关键词：农民经济组织合作制 farmer economic organization cooperative system

来源：人大复印报刊资料评论

在线全文

人大复印报刊资料

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

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

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：