三峡库区水环境污染预警与决策系统设计与实现

以三峡库区重庆段水环境地质调查项目为基础,综合应用数据库,GIS,RS,GPS,计算机网络和现代检测技术及水环境中有机污染物、营养物、重金属污染的研究方法,提出了库区水环境污染物预警与决策支持信息系统总体设计和数据库设计架构。为政府部门科学决策和管理监控提供一个先进的信息平台,也为整个三峡库区水环境可持续发展提供有效的信息参考。     

基于模糊AHP法的机载指控系统效能评估

指控系统是机载C3I系统的核心组成部份。为了合理而有效地评估机载指控系统效能,运用模糊AHP分析法对该分析法中的权值的模糊性进行了处理,建立了机载指控系统效能评估模型,并通过具体算例证明了此方法的有效性和可行性,为机载指控系统的效能评估提供了一种方法和途径。     

灭雷具CGF仿人操控行为建模

灭雷具在动力上受海流和电缆的非线性耦合作用力影响,其水下操控十分复杂。针对灭雷具CGF(Computer Generation Force)系统行为建模的需求,建立了简化的四自由度动力学模型,同时考虑了海流和电缆扰动的影响并对缆长和动力分配进行优化计算以实现最优缆长控制和最短路径规划;综合分析了灭雷具水下操控规则,从动力控制和路径规划两个层次来建立其行为规则库,得到了与实际相符的灭雷具智能体仿人操控轨迹。仿真结果表明了该行为模型的正确性和有效性,能较好的满足仿真系统的需求。     

ARM内核体系架构及ARMv6上的Linux开发与优化

介绍了各款ARM内核体系架构的特性和增强技术,讨论了在ARMv6上的Linux开发与优化。从6款ARM内核体系架构的特性分析入手,引入了对ARM内核体系架构重要增强技术的介绍,在分析ARMv6体系架构功能特性的基础之上,分别讨论了Linux内核和工具链等所做的优化与改进。     

数字中频接收机中的数字AGC的设计与实现

介绍了数字自动增益控制(AGC)技术在数字中频接收机中的实现方法’,提出了利用 DSP Builder模型库设计的一种实用的数字自动增益控制电路,所设计的电路在数字中频接收机系统内工作良好。该数字 AGC具有快速收敛、结构简单、性能稳定和成本低等特点。占用 Altera StratixⅡ FPGA 片上163个自适应逻辑单元(ALUTs)。     

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。     

The multiplicative representation for multiple objectives optimization with an application for arms procurement

Multiple Objectives Optimization is much seen in combination with linear functions and even with linear programming, together with an adding of the objectives by using weights. With distance functions, normalization instead of weights is used. It is also possible that together with an additive direct influence of the objectives on the utility function a mutual utility of the objectives exists under the form of a multiplicative representation. A critical comment is brought on some representations of this kind. A full‐multiplicative form may offer other opportunities, which will be discussed at length in an effort to exclude weights and normalization. This theoretical approach is followed by an application for arms procurement. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 327–340, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10014     

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     

一种变结构导引律及其在垂直命中制导中的应用

基于变结构控制理论 ,提出了一种垂直命中目标的导引律。该导引律在引入理想的视线角基础上 ,所设计的切换函数不仅保证脱靶量为零 ,而且能同时达到垂直命中目标的目的。数字仿真表明 ,该导引律与最优垂直命中导引律相比 ,不仅适用范围广 ,而且具有良好的鲁棒性能。     

自动操瞄分段解析模糊控制器

提出一种基于分段解析模糊算法的控制器。该控制器采用分段解析函数控制规则 ,函数运算结果直接作为输出控制量 ,简化了模糊处理过程 ,且使得输出控制量参数具有自调整能力。实际应用表明 ,该模糊控制器成功地实现了火箭炮的自动操瞄控制。