修正的响应面方法优化螺栓法兰连接结构几何参数

采用响应面法对螺栓法兰连接进行优化设计时,考虑到经典响应面模型的局限性,在获得结构优化参数与响应指标内在联系的基础上,提出了修正响应面模型;设计了数值试验并对比了数值试验值与前述两种响应面模型预测值,结果表明修正响应面模型的预测值不仅误差相对比较均匀,且最大误差绝对值要明显小于经典响应面模型的相应值。采用遗传算法对修正响应面模型进行了以法兰质量最轻为优化目标的参数优化,取得了比较理想的优化结果。     

水下声源引起的水表面横向微波的理论研究

利用水下声信号在水表面引起的水表面横向微波振幅很小的条件,将普遍的流体力学方程线性化,推导出在水下点声源的激励下,水表面产生的二维横向微波色散关系以及波的传播形式。结果表明,二维水表面的横向微波具有和一维情况类似的结果,即具有波长短、传播速度小的特点,因而可以对入射到表面的激光束进行调制,为水下声信号检测奠定了理论基础。     

YHVRP中的复杂行为建模

提出了一种基于复杂行为的语言模型对虚拟环境尤其是实体行为进行建模，该模型提供较强的定义行为关系及其时间约束的能力。利用自行研制的分布式虚拟环境软件开发平台ＹＨＶＲＰ的建模语言ＹＨＶＭＬ实现了该模型，同时ＹＨＶＭＬ语言的运行环境实现了面向复杂行为的虚拟环境计算模型，并利用ＬＩＦ策略对实体行为进行动态调度，以保障面向复杂行为的虚拟环境应用的实时交互性和真实感。     

复杂网络理论体系对抗作战体系建模

从复杂网络的角度出发研究作战体系的网络拓扑模型,建立了作战体系网络的拓扑模型,分析了模型的度分布特征,提出了描述作战体系网络的统计特征量,并针对体系破击进行了相应的仿真实验,得出了与战争事实相符的结论,从复杂网络角度仿真作战体系进行了积极的探索和尝试.     

磺化酚醛树脂的研究:合成及性能

制备了一系列水溶性磺化酚醛树脂,并对表面张力、水泥静浆流动度和水泥砂浆减水率进行了测定,结果显示,合成的磺化酚醛树脂具有合适的表面活性,减水效果优良.     

先进制造技术与表面工程

介绍了表面工程的最新发展,表面工程与先进制造技术的关系,表面工程的学科体系与特色,表面工程在节能、节材、降耗和高新技术发展方面的作用.并提出了对发展表面工程的建议.     

Response surface analysis of two‐stage stochastic linear programming with recourse

We apply the techniques of response surface methodology (RSM) to approximate the objective function of a two‐stage stochastic linear program with recourse. In particular, the objective function is estimated, in the region of optimality, by a quadratic function of the first‐stage decision variables. The resulting response surface can provide valuable modeling insight, such as directions of minimum and maximum sensitivity to changes in the first‐stage variables. Latin hypercube (LH) sampling is applied to reduce the variance of the recourse function point estimates that are used to construct the response surface. Empirical results show the value of the LH method by comparing it with strategies based on independent random numbers, common random numbers, and the Schruben‐Margolin assignment rule. In addition, variance reduction with LH sampling can be guaranteed for an important class of two‐stage problems which includes the classical capacity expansion model. © 1999 John Wiley & Sons, Inc. Naval Research Logistics 46: 753–776, 1999     

基于Arena仿真的事故网络风险耦合特性分析

风险传递过程中,耦合是导致风险突变的重要原因。为提供风险耦合控制方法,给出风险耦合的形式化描述,采用风险耦合弹性系数对耦合强度进行计算;基于Arena软件对某型非致命武器设计论证阶段的进度风险和费用风险之间的耦合特性进行仿真分析,分别仿真了单指标、多指标在线性和非线性耦合情形下的系统行为,结果表明:全局性的线性耦合和高强度非线性耦合能显著改变系统行为。相关结果为风险耦合控制策略的制定提供了参考。     

基于PageRank算法的武器装备体系重要节点评估

将武器装备系统抽象为网络节点,利用复杂网络理论研究评估武器装备体系中的重要节点。针对传统PageRank算法在该应用中存在的问题,提出一种修正的PageRank算法。该算法对悬挂节点及有向环状网络节点的重要度评估具备收敛性。仿真实例验证了该修正算法对双目标作战环节点重要度评估的有效性。为了进一步验证所提算法的准确性,引入特征谱理论和移除节点法评估网络的抗毁性。     

UNCLOS and maritime security: the “securitisation” of the South China Sea disputes

This Critical Comment seeks to situate the United Nations Convention on the Law of the Sea (UNCLOS) within the context of South China Sea (SCS) dispute. Bearing in mind that maritime actions of the main disputants – China, Vietnam, and the Philippines – increasingly “securitise” these long-standing disputes and vice versa, the study examines the concept of a maritime “regime complex.” Whereas efforts have being made to examine UNCLOS and indeed the dispute within the framework of a maritime “regime complex,” the key finding shows that the increased “securitisation” of the disputes makes it difficult to envisage effective engagement of UNCLOS as a resolution mechanism. It will also reveal that China's firmly established expansionist agenda in the SCS region is indicative of Beijing's susceptibility to compromise a diplomatic solution to these long-standing disputes. These discoveries are structured around the knowledge that the spatial relation of the SCS critically espouses not only its geo-strategic significance in terms of natural resources endowment, but also the enduring maritime disputes within the region.