防半穿甲导弹战斗部动能穿甲模拟试验研究

根据半穿甲导弹破坏机理和穿甲力学中的相似理论 ,以目前世界上典型的半穿甲导弹战斗部为模拟对象 ,设计出试验装置、弹丸和 3个系列共十几种结构形式的靶板 .通过对试验结果的分析比较 ,得出各种装甲结构形式抗半穿甲导弹动能穿甲特性 .     

蒸汽动力装置分布式控制系统可靠性设计准则

讨论了为保证蒸汽动力装置分布式控制系统的可靠性所采取的一般技术 ,详细分析了提高蒸汽动力装置分布式控制系统可靠性的一般设计准则 ,包括系统设计的一般要求、计算机的选型、元器件的选择与使用以及抗干扰措施     

机械设计系列课程教改对比试验情况分析

简述了机械设计系列课程教学改革的主要思想,给出了教改教学实践环节中对比试验的具体内容。通过重点分析对比试验的量化指标,对教改进行了阶段总结,归纳了教改的若干经验,提出了存在的问题并分析了原因。     

Designing a screening experiment for highly reliable products

Within a reasonable life‐testing time, how to improve the reliability of highly reliable products is one of the great challenges to today's manufacturers. By using a resolution III experiment together with degradation test, Tseng, Hamada, and Chiao (1995) presented an interesting case study of improving the reliability of fluorescent lamps. However, in conducting such an experiment, they did not address the problem of how to choose the optimal settings of variables, such as sample size, inspection frequency, and termination time for each run, which are influential to the correct identification of significant factors and the experimental cost. Assuming that the product's degradation paths satisfy Wiener processes, this paper proposes a systematic approach to the aforementioned problem. First, an intuitively appealing identification rule is proposed. Next, under the constraints of a minimum probability of correct decision and a maximum probability of incorrect decision of the proposed identification rule, the optimum test plan (including the determinations of inspection frequency, sample size, and termination time for each run) can be obtained by minimizing the total experimental cost. An example is provided to illustrate the proposed method. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 514–526, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10024     

MIMO-OFDM最优训练序列设计

推导得到了宽带 MIMO-OFDM 信道模型。在空间相关情况下推导了非盲信道估计的 Bayesian CRB及 Bayesian MMSE。利用 Bayesian CRB 准则对发送的训练序列进行了功率分配,而后利用一种线性规划的方法对带有保护带宽 MIMO-OFDM 训练符号进行子载波功率分配,并利用发端酉矩阵进行最优相位设计。     

基于UML的兵力机动辅助决策软件设计

首先简要介绍了UML的建模体系,然后在使用UML对兵力机动辅助决策软件进行功能需求分析的基础上,进行了问题领域分析,建立了软件的静态和动态模型,并将该软件系统的各种要素、事件和活动,分别在时间和空间上进行了描述,方便开发人员之间的交流,为系统的分析、设计、维护及扩展提供了有利的支持,为兵力机动辅助决策软件系统的研制奠定了基础.     

潜艇兵力作战方案选优软件的设计与实现

对联合封锁中潜艇兵力作战方案选优问题进行了研究,针对在只有一个选优指标时,人们通过比较分析法能够容易地准确判别方案优劣的特点,综合采用了改进的层次分析法、模糊综合评判等方法设计并实现了方案的选优。通过验证,该软件在应用于作战方案多目标决策等复杂系统时是适用的和可靠的,并且此软件较为简便,可操作性强。     

油料装备中发动机与油泵的匹配设计探讨

油料装备中发动机与油泵的合理匹配是设计中需解决的一个重要问题。介绍 了油料装备发动机与油泵的匹配原则,分析了油泵和发动机工作时所需的动力,发现发动机 在驱动油泵时具有一定的功率储备,尤其是共用发动机具有较大的功率储备,提出利用发动 机万有特性曲线进行匹配设计。     

2014nccet:基于SI仿真的高密度存储服务器高速链路设计

针对高密度存储服务器中高速链路结构复杂、信号速率高、链路长度长等特点,在高速链路PCI-E3.0和SAS3.0设计过程中引入全面的SI仿真。通过对高速PCB设计中拓扑结构、材料类型、PCB结构等关键项目进行仿真设计,获得成本最低、性能达标的最优方案;通过全链路有源仿真,预估系统性能,降低系统投产风险;通过系统实际信号测试,验证系统性能完全满足相应规范要求,仿真结果有效可靠。     

Chance‐constrained multi‐terminal network design problems

We consider a reliable network design problem under uncertain edge failures. Our goal is to select a minimum‐cost subset of edges in the network to connect multiple terminals together with high probability. This problem can be seen as a stochastic variant of the Steiner tree problem. We propose two scenario‐based Steiner cut formulations, study the strength of the proposed valid inequalities, and develop a branch‐and‐cut solution method. We also propose an LP‐based separation for the scenario‐based directed Steiner cut inequalities using Benders feasibility cuts, leveraging the success of the directed Steiner cuts for the deterministic Steiner tree problem. In our computational study, we test our branch‐and‐cut method on instances adapted from graphs in SteinLib Testdata Library with up to 100 nodes, 200 edges, and 17 terminals. The performance of our branch‐and‐cut method demonstrates the strength of the scenario‐based formulations and the benefit from adding the additional valid inequalities that we propose. © 2015 Wiley Periodicals, Inc. Naval Research Logistics 62: 321–334, 2015