Congregation Formation in Multiagent Systems

We present congregating both as a metaphor for describing and modeling multiagent systems (MAS) and as a means for reducing coordination costs in large-scale MAS. When agents must search for other agents to interact with, congregations provide a way for agents to bias this search towards groups of agents that have tended to produce successful interactions in the past. This causes each agent's search problem to scale with the size of a congregation rather than the size of the population as a whole. In this paper, we present a formal model of a congregation and then apply Vidal and Durfee's CLRI framework [24] to the congregating problem. We apply congregating to the affinity group domain, and show that if agents are unable to describe congregations to each other, the problem of forming optimal congregations grows exponentially with the number of agents. The introduction of labelers provides a means of coordinating agent decisions, thereby reducing the problem's complexity. We then show how a structured label space can be exploited to simplify the labeler's decision problem and make the congregating problem linear in the number of labels. We then present experimental evidence demonstrating how congregating can be used to reduce agents' search costs, thereby allowing the system to scale up. We conclude with a comparison to other methods for coordinating multiagent behavior, particularly teams and coalitions.     

串联工业机器人系统可靠度的一种两级优化分配及其算法

提出一种两优化原则,整体可靠度分配给子系统采用“花费”最小原则,子系统可靠度分配给单元采用考虑“权重”的优化原则,并且采用两种优化算法,即用能简化求解过程的目标协调法,二维混合协调法和ＡＧＲＥＥ法对可靠度优化分配进行求解,从而使系统全局可靠度优化分配的效果更好。     

南方电网失步解列装置整定方案

用BPA(Bonneville Power Administration)程序对南方电网目前配置的失步解列系统的定值设置及协调配合进行研究,特别是研究了低压减载的影响以及判出失步后解列不同断面的效果。研究将BPA程序计算结果回放进实际失步解列装置以检验动作结果与分析是否相符,并建立了由南方电网交直流混合实时数字仿真(RTDS)模型、失步解列系统、功率放大器、直流控制保护装置组成的实时闭环试验系统,对研究结论进行了验证。一系列研究表明,在考虑系统中低压减载装置实际动作效果的情况下,为保证失步解列装置的正确动作,需对当前该装置的配置和整定值进行调整。     

基于多属性决策的多维时序信任度排序模型

针对属性权重未知且评价数据为多维时序的信任度排序问题,提出一种基于线性规划理论的信任度排序方法。首先使用线性规划模型确定一维时序下属性权重未知的多个节点信任度排序上下限向量,然后建立多维时序下信任度的最优协调排序模型,再将模型转化为典型指派问题并利用匈牙利算法进行求解,从而得到各个节点的信任度排序。实例分析表明,当最优协调排序模型中距离参数q取低值时,对极值数据不敏感,可以防止少数评价数据突变造成的误评; 当q选取高值时,对极值数据较敏感,可以识别受评对象中信任度摇摆不定的潜在不诚实对象。     

利用局部指标进行电压稳定在线监控的研究

章利用局部电压稳定指标Ｌｊ进行电压稳定弱节点在线电压稳定局部监控的研究,给出了利用Ｌｊ指标确立负荷节点的相关发电机集和发电机的相关负荷集的方法,讨论了发电机励磁极限对系统稳定状态的影响,并在此基础上提出了一种局部在线监控的方案。     

采动区建筑物附加地基反力变化规律研究

为了研究采动区建筑物附加地基反力的变化规律,采用采动区建筑物地基、基础和结构协同作用力学模型,研究了建筑物位于采动区不同位置时附加地基反力的分布变化规律,指出地表曲率变形值是控制附加地基反力大小及分布形态的主导因素;并研究了建筑物长度、弹性模量、地基系数、开采厚度、建筑物高度等各种因素对建筑物附加地基反力的影响规律,同时建立了附加地基反力最大值与各影响因素之间的关系式.     

DFT study of coinage metal-hydrogen associations as hydrogen storage materials stabilized by weakly coordinating anions

Density Functional Theory (DFT) calculations were employed to study a series of coinage metal-hydrogen associations formulated as [M(Η₂)_n][A] (M = Cu^I, Ag^I or Au^I, n = 1–5). The [M(Η₂)_n][A] salts utilize both their anions and cations for H₂ storage. The [M(Η₂)_n]⁺ cations could be stabilized in the solid state by voluminous counter-anions, i.e. the [(H₃B) (BH₂NH₂)₅(NH₂)]^-, [B(CNBH₃)₃]^- and [B₁₂H₁₂]^- anions. The estimated bond dissociation energies (BDEs) of the M···(η²-H₂) bonds are 5–17, 4–11 and 1–26 kcal/mol for the [Cu(Η₂)₄]⁺, [Ag (Η₂)₄]⁺ and [Au (Η₂)₄]⁺ cationic species respectively, while the fifth H₂ molecule is estimated to be very loosely associated to the metal center. Four H₂ molecules could be exploited from the [Cu(Η₂)_n][A] and [Ag (Η₂)_n][A] molecules in addition to the amount of H₂ stored in the anion [A]^-. Among the [M(Η₂)_n][A] salts optimal gravimetric, kinetic and thermodynamic properties and relatively low cost, are predicted for [Cu(Η₂)_n][(H₃B) (BH₂NH₂)₅(NH₂)].     

房地产开发应与城市规划协调发展

分析我国房地产开发过程中存在的问题,阐述了协调城市规划与房地产开发的原则和措施.     

南水北调济平干渠工程建设与环境协调工作思考

南水北调济平干渠工程是国务院确定的南水北调2002年12月底首批开工项目,也是山东南水北调建设管理机构尚未成立时开工的第一个工程,还是山东省水利厅直接作为项目法人负责工程建设的首个项目。由于该工程的许多特殊性和国家近期土地等政策因素影响,使得工程建设出现了很多新情况和困难,但即便如此,该工程仍按期建成通水。结合工程建设模式和主要措施,对工程建设中的建管机构、建管机制、征地迁占等问题进行了讨论。     

加强组织、协调、控制、服务提高建设管理水平

从企业领导层面,总结了提高建设管理水平的经验,核心内容是,认真贯彻执行业主负责制,坚持"建设高起点,管理高标准",充分发挥"组织、协调、控制、服务"的职能作用.