基于并行模拟的多核集群系统性能预测和分析

针对多核集群系统所表现出的新的性能特征,提出了面向多核集群系统消息传递应用程序的并行模拟模型并设计、实现了一个并行模拟器MCPSim(Multi-core Cluster Parallel Simulator),MCPSim在功能模型和性能模型上体现了片内核间、结点内片间以及结点间等三个层次上消息通信的特点,同时支持对应用的消息数量、通信量等的百分比分布的profiling功能,采用PRIMEJ、acobi3D、NPB IS以及HPL等Benchmark程序对MCPSim进行了测试,结果表明MCPSim性能预测的精度优于BigSim,同时能够广泛应用于针对多核集群系统消息传递应用程序的性能分析中。     

Robustness of efficient server assignment policies to service time distributions in finite‐buffered lines

We study the assignment of flexible servers to stations in tandem lines with service times that are not necessarily exponentially distributed. Our goal is to achieve optimal or near‐optimal throughput. For systems with infinite buffers, it is already known that the effective assignment of flexible servers is robust to the service time distributions. We provide analytical results for small systems and numerical results for larger systems that support the same conclusion for tandem lines with finite buffers. In the process, we propose server assignment heuristics that perform well for systems with different service time distributions. Our research suggests that policies known to be optimal or near‐optimal for Markovian systems are also likely to be effective when used to assign servers to tasks in non‐Markovian systems. © 2010 Wiley Periodicals, Inc. Naval Research Logistics, 2010     

The effects of model parameter deviations on the variance of a linearly filtered time series

We consider a general linear filtering operation on an autoregressive moving average (ARMA) time series. The variance of the filter output, which is an important quantity in many applications, is not known with certainty because it depends on the true ARMA parameters. We derive an expression for the sensitivity (i.e., the partial derivative) of the output variance with respect to deviations in the model parameters. The results provide insight into the robustness of many common statistical methods that are based on linear filtering and also yield approximate confidence intervals for the output variance. We discuss applications to time series forecasting, statistical process control, and automatic feedback control of industrial processes. © 2010 Wiley Periodicals, Inc. Naval Research Logistics, 2010     

基于等值线约束的地磁匹配定位技术

地磁匹配定位是利用地磁图进行定位的方法,位置输出可用于限制惯导系统的误差积累.介绍了地磁辅助导航的原理和发展现状,并重点研究了地磁匹配定位技术.提出了一种基于等值线约束的改进的相关匹配算法,能有效消除导航系统的初始位置误差并能限制匹配过程中惯导系统的积累误差.仿真实验证明该算法能有效地提高相关匹配的实时性,并能把定位精度控制在地磁数据网格间距以内.算法对航向误差具有一定的适应性.     

基于模型跟踪变结构控制的飞行重构控制律设计

提出一种基于模型跟踪变结构控制的飞行重构控制律的设计方法.利用该方法能实现受控对象对理想模型较高精度的跟踪,使重构飞行控制系统具有较好的控制性能.首先设计了一个比例-积分滑模面以确保消除稳态误差,采用极点配置技术使滑模具有良好的动态品质,其次利用饱和控制技术来减少变结构控制引起的抖振现象,最后以某型飞机纵向飞行控制系统为例进行了相应的数字仿真.结果表明重构系统不仅实现了无抖振模型跟踪,而且还具有较强的鲁棒性.     

省部共建高校的服务定位：打造区域经济社会发展的核心动力源

省部共建高校是我国高等教育的重要组成部分，其服务应立足区域经济建设和社会发展的需要，一方面推进区域自主创新，另一方面实现学校自身又好又快的发展。该文从人才培养、科技创新、社会服务、文化辐射四方面分析了省部共建高校的服务定位，提出力争将其建设成为推动区域经济社会发展的核心动力源，成为地方高校发展的示范集群。     

Optimal outbound dispatch policies: Modeling inventory and cargo capacity

In this paper, we present an optimization model for coordinating inventory and transportation decisions at an outbound distribution warehouse that serves a group of customers located in a given market area. For the practical problems which motivated this paper, the warehouse is operated by a third party logistics provider. However, the models developed here may be applicable in a more general context where outbound distribution is managed by another supply chain member, e.g., a manufacturer. We consider the case where the aggregate demand of the market area is constant and known per period (e.g., per day). Under an immediate delivery policy, an outbound shipment is released each time a demand is realized (e.g., on a daily basis). On the other hand, if these shipments are consolidated over time, then larger (hence more economical) outbound freight quantities can be dispatched. In this case, the physical inventory requirements at the third party warehouse (TPW) are determined by the consolidated freight quantities. Thus, stock replenishment and outbound shipment release policies should be coordinated. By optimizing inventory and freight consolidation decisions simultaneously, we compute the parameters of an integrated inventory/outbound transportation policy. These parameters determine: (i) how often to dispatch a truck so that transportation scale economies are realized and timely delivery requirements are met, and (ii) how often, and in what quantities, the stock should be replenished at the TPW. We prove that the optimal shipment release timing policy is nonstationary, and we present algorithms for computing the policy parameters for both the uncapacitated and finite cargo capacity problems. The model presented in this study is considerably different from the existing inventory/transportation models in the literature. The classical inventory literature assumes that demands should be satisfied as they arrive so that outbound shipment costs are sunk costs, or else these costs are covered by the customer. Hence, the classical literature does not model outbound transportation costs. However, if a freight consolidation policy is in place then the outbound transportation costs can no longer be ignored in optimization. Relying on this observation, this paper models outbound transportation costs, freight consolidation decisions, and cargo capacity constraints explicitly. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 531–556, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10030     

MUOS网络管理与控制技术的研究

介绍了美军移动用户目标系统MUOS(Mobile User Objective System),分析和总结了该系统下网络管理体系结构和运行机制,并就其实现中的关键技术进行了深入研究,得到了一些对我国有借鉴意义的结论。     

公安边防部门刑事侦查权的取得与完善

公安边防部门取得刑事侦查权，是侦查体制改革的结果。但在边防管辖和查办案件的种类、边防海警刑事办案权的实现、边防检查站查获的刑事案件的管辖、公安边防部门侦查主体资格的完善等方面，还应继续改革．使边防部门刑事侦查机制不断完善。     

公共娱乐场所消防安全现状及防火对策研究

针对近几年来全国公共娱乐场所发生的数起群死群伤重、特大火灾案例，分析了该类场所的消防安全现状以及存在的主要消防问题，提出了针对公共娱乐场所的防火对策。