融合MASIF和FIPA规范的开放式Agent平台

按一定的标准规范实现的Agent平台是开发Agent技术应用的基础。在分析了MASIF和FIPA两种Agent规范的基础上,讨论了开发融合这两种规范的Agent平台涉及的主要技术,描述了融合两种规范的开放式Agent平台YTSC-F参照模型。     

基于高精度导航设备的海上多传感器配准算法

对海上多平台多传感器误差配准问题,利用平台的高精度导航信息将各传感器的量测数据转换到地心坐标系下,构建关于传感器偏差和舰艇姿态误差的伪测量模型,采用卡尔曼滤波对配准误差进行在线估计和补偿.算法较好地解决了传统的基于球极投影误差配准技术受地球曲率影响的不足,并突破了离线配准算法假定配准误差恒定的限制.仿真实验结果验证了算法的正确性和有效性.     

基于机制设计理论的自组网节点合作协议

在移动自组网中,如何激励自私节点,使之参与网络合作,是当前研究的热点问题.文中提出了LMOCP协议,采用VCG机制计算转发节点的支付.通过引入邻居发现机制,并改进路由发现过程,使网络中控制消息的数量从O(n3)减少到O(n2).对协议的正确性进行了分析,并证明了LMOCP协议是事后纳什可实施的,在所有节点都是理性的这一共同知识的假定下,每个节点的最优策略是诚实地报告自己的转发价格.通过ms-2对协议进行了验证,仿真结果显示,与现有的几种重要协议相比,LMOCP协议具有更低的消息负载和网络延迟.     

Research on the application of 4-weighted fractional Fourier transform in communication system

The paper reveals the relationship between the weighting coefficients and weighted functions via the research of coefficients matrix and based on the original definition of 4-weighted fractional Fourier transform(4-WFRFT).The multi-parameters expression of weighting coefficients are given.Moreover, the 4-WFRFT of discrete sequences is defined by introducing DFT into it, which makes it suitable for digital communication systems.After analyzing the properties of WFRFT, a typical scheme for modulation/demodula...     

基于卡尔曼过滤的多传感器协作数据重构算法研究

本文针对多传感器系统存在的数据易丢失、易受干扰和易失真等问题,在卡尔曼过滤的基础上结合协同合作方式提出了一种协作数据重构算法。该算法从一阶线性化、二次加权突变平滑和随机统计特征等方面出发建立了适用于多传感器系统的卡尔曼过滤算法,然后基于中继转发信号和自适应感知时间间隙,给出了协作数据重构多传感器系统协同过程控制算法。数学分析和实验结果表明,所提算法与压缩感知重构算法相比在监测数据准确度、均方差、功耗和能耗等方面表现出优势。     

Collaborative distribution between two logistics service providers

Mathematical models are described for collaborative distribution between two logistics service providers (LSPs). We find that (a) collaborative distribution is conditionally profitable for LSPs, and the conditions for cooperation are given; (b) LSPs save more costs primarily by shortening the delivery distance and decreasing delivery speed; (c) collaborative distribution makes the delivery time either shorter or longer; (d) if one LSP changes its equilibrium price, the total profit conditionally increases, and this condition is related to demand structure and delivery cost structure; and (e) collaborative distribution can solve the personalization of delivery time and reduce pollution to some extent. For the companies sharing the incremental profit, we characterize a transfer payment contract that includes fixed and variable fees. Our findings suggest that LSPs should adopt collaborative distribution to formulate an optimal distribution plan to save costs and shorten the delivery time, and should select partners with smaller cost parameters and both different and moderate speeds. In addition, warehouse and vehicle sharing are beneficial to the implementation of collaborative distribution.     

Parallel characterizations of a generalized Shapley value and a generalized Banzhaf value for cooperative games with level structure of cooperation

We present parallel characterizations of two different values in the framework of restricted cooperation games. The restrictions are introduced as a finite sequence of partitions defined on the player set, each of them being coarser than the previous one, hence forming a structure of different levels of a priori unions. On the one hand, we consider a value first introduced in Ref. [18], which extends the Shapley value to games with different levels of a priori unions. On the other hand, we introduce another solution for the same type of games, which extends the Banzhaf value in the same manner. We characterize these two values using logically comparable properties.     

多Agent系统的组织结构与协同

协同是多Agent系统研究的主要内容,组织结构为Agent成员提供一个相互之间交互的框架以及多Agent群体求解问题的高层观点和相关信息,文章分析了多Agent系统协同所涉及的问题,并对不同组织结构的多Agent协同问题进行了讨论.     

基于JXTA的课程辅助教学系统的研究与实现

本文叙述了P2P网络的概念、发展历史以及它与传统网络模式的区别,探讨和分析了JXTA技术,阐述了基于JXTA技术对分布式课程辅助教学应用系统JBCAT的研究、设计与实现。     

National and International Water Law

Abstract

The exchange of data and information relating to transboundary water resources is widely accepted as being an appropriate starting point for more comprehensive cooperation. This paper examines under what conditions data and information exchange occur in relation to shared water resources, and hence examines when it can be used as a confidence building measure. An overview of several major international river basins together with more detailed case studies of the Mekong. Rio Grande, and Rhine River basins suggest that factors that promote data and information exchange include the presence of compatible needs, absence of legacies of mistrust, increasing water resources stress, perceptions that cooperation is of mutual benefit, external pressure and funding, comparable levels of institutional capacity, popular and political concern about water resources management, and functional formal or informal cooperative arrangements. Analysis of the situation prevailing between Israel and the Palestinians with regard to shared water resources suggests that data and information exchange does not seem likely in the short term, even though other forms of cooperation have been established with mixed results. This suggests that in some situations, at least, data and information exchange relating to shared water resources may not be useful as a first step in establishing more comprehensive cooperation.