两栖车辆水阻力构成研究

分析了排水型两栖车辆的水阻力构成,当两栖车辆高速航行时,形状阻力占主要成分,形状阻力是影响两栖车辆水上机动性的主要因素,模型拖曳试验结果验证了该分析结果.     

磁性微粉/聚乙烯复合材料的电磁特性

研究了磁性微粉的物相组成及其与聚乙烯相复合制成的吸波材料在８． ２～１２． ４ＧＨｚ 频段内的电磁特性。结果表明： 复合材料中聚乙烯的加入量对电磁特性在上述频段内各频率范围影响程度不同； 磁性微粉中聚碳硅烷量为２０％ 时， 反射衰减大于６ｄＢ对应的频带宽度为２ＧＨｚ。     

一种推广的连续情形经济投资模型

随着序列情形费用型投资模型和折扣投资模型的解决，本文对其进行连续推广，并给出一个明确的停止规则。     

面向应用的分布式多机联合计算的系统设计问题

随着计算机应用向分布和异构发展，如何建立一个具有良好性能价格比的分布式多机联合计算系统是当前计算机应用开发者遇到的重要课题。文中结合分布式仿真应用实例，对多计算机联合计算的系统划分、数据通讯机制和高性能并行计算问题进行了论述。     

Flexible capacity strategy in an asymmetric oligopoly market with competition and demand uncertainty

This article studies flexible capacity strategy (FCS) under oligopoly competition with uncertain demand. Each firm utilizes either the FCS or inflexible capacity strategy (IFCS). Flexible firms can postpone their productions until observing the actual demand, whereas inflexible firms cannot. We formulate a new asymmetrical oligopoly model for the problem, and obtain capacity and production decisions of the firms at Nash equilibrium. It is interesting to verify that cross‐group competition determines the capacity allocation between the two groups of firms, while intergroup competition determines the market share within each group. Moreover, we show that the two strategies coexist among firms only when cost differentiation is medium. Counterintuitively, flexible firms benefit from increasing production cost when the inflexible competition intensity is sufficiently high. This is because of retreat of inflexible firms, flexibility effect, and the corresponding high price. We identify conditions under which FCS is superior than IFCS. We also demonstrate that flexible firms benefit from increasing demand uncertainty. However, when demand variance is not very large, flexible firms may be disadvantaged. We further investigate the effects of cross‐group and intergroup competition on individual performance of the firms. We show that as flexible competition intensity increases, inflexible firms are mainly affected by the cross‐group competition first and then by the intergroup competition, whereas flexible firms are mainly affected by the intergroup competition. Finally, we examine endogenous flexibility and identify its three drivers: cost parameters, cross‐group competition, and intergroup competition. © 2017 Wiley Periodicals, Inc. Naval Research Logistics 64: 117–138, 2017     

球形头部弹丸侵彻运动靶板的数值模拟

为研究球形头部弹丸高速侵彻运动靶板的侵彻规律,运用LS-DYNA动力分析软件仿真研究了不同条件下球形头部弹丸对靶板的正侵彻效应,获得了运动靶板厚度、材料和弹丸着速3种参数对侵彻过程中弹丸弹道偏移、翻转角度和剩余速度的响应规律。结果表明,随着着速的提高,弹丸翻转幅度和弹道偏移量逐渐减小;随着靶板厚度的增加,弹丸正向翻转角度和轴向剩余速度显著减小,而弹道偏移量增大;3种材料运动靶板中,4340钢靶对弹丸弹道偏移、翻转角度和剩余速度的影响最大,Weldox460钢次之,LY12铝最小。     

修订地方性消防法规需要审视的几个关系

随着消防法的修订颁布,目前各地适用的地方性消防法规的相关规定已经不适应新形势下消防法制建设的需要,亟待重新修订。通过对消防法、相关法律以及部门消防规章与地方性消防法规之间关系的审视和分析,为地方性消防法规的修订提供参考。     

老子之“德”的当代价值审视

老子之“德”是法自然之“道”的具体体现,是以律己、谦恭和贵柔为主要内容的。随着我国物质生活水平的日益提高,人们过度追求物欲的满足,各种矛盾层出不穷,内心冲突不断加剧,人们的精神家园匮乏。所以,重新审视老子“德”的当代价值,对于构建和谐社会,促进人与自然、人与人、人与社会的和谐相处,化解人们的精神危机,具有重要的现实意义。     

对匡正干部部门选人用人风气的思考

新形势下匡正干部部门选人用人风气,是干部部门自身建设的重要内容,必须以加强理论学习为基础,不断提高干部工作者树立良好作风的自觉性;以加强党性修养和锻炼为根本,努力提升干部工作者的思想政治素质;以加强制度建设为保证,用工作纪律、行为规范约束干部工作者的用权行为.     

在解放思想解决问题中推进部队科学发展

在解放思想、解决问题中推进部队科学发展,就是要着力解决在新的思想高度上形成共识问题;解决部队建设全面加强、协调推进的问题;解决领导方式和工作方法问题.