太阳能光电热系统换热器性能实验研究

设计了新型半圆管形式的不锈钢板式换热器,对其作为太阳能光电热综合利用一体化系统集热组件的性能进行实验研究。通过新型集热光电热组件及光电组件系统的对比实验,研究该光电热组件在重庆地区夏季应用情况,分析其光电和光热特性。结果表明:在以晴朗为主的天气,半圆管形式的不锈钢板式光电热组件电热系统的电热性能与光电组件系统的相比较,前者的太阳能电池输出功率提高约26.48%,热利用效率提高23.70%以上,新型半圆管形式的光电热组件整体光电热(光电+光热)综合效率可达到25.70%,有效提高了光电热系统的综合效率。新型半圆管形式不锈钢板式换热器的换热面积增大,提高了换热效率,为太阳能光电热综合利用一体化系统在重庆等太阳辐射强度较小地区的应用提供了参考。     

信息扩散模型的窗宽优化与鱼雷战术效能实验评估

针对海洋环境对鱼雷等武器装备战术效能影响的试验数据和案例样本匮乏等普遍性问题,引入信息扩和模糊映射思想,并基于遗传算法改进和发展了最优窗宽扩散模型。该方法可从有限的试验样本中客观拟合出数据结构信息,进而实现有限数据样本信息的合理扩散。利用该方法进行了基于小样本案例的潜射鱼雷战术效能的海洋环境影响评估的信息扩散建模和仿真实验和对比分析。结果表明,窗宽优化的信息扩散模型可有效改进常规信息扩散模型的评估效果,对武器装备环境影响评估中普遍存在的小样本或信息不完备困难有一定参考应用意义。     

“化四个象限积分为一个象限积分”在营射击效率计算中的应用

讨论了营集火一距离射击的射击效率计算过程,给出了射击效率计算中对炮单独误差、连单独误差和营共同误差的积分在第一象限的积分表示.分析了在第一象限对单炮误差、连单独误差和营共同误差进行积分的有限区域,给出了营集火一距离射击效率计算的算例.从算例的计算结果分析,得出结论为:营集火射向一距离射击效率计算的计算间隔取H=0.6或H=0.8是合适的.     

Institutionalizing supreme command: explaining political–military integration in the Vietnam War, 1964–1968

Under what conditions can leaders achieve wartime political–military integration? In the Vietnam War, political–military integration exhibited dramatic variation: in the air war, the US was able to tightly integrate its political objectives and military conduct, but in the ground war, the American military prosecuted a strategy that was both divorced from broader political objectives and was immune from Washington's influence. I argue that the nature of information management between the military and civilian leadership explains the pattern of political–military integration in the Vietnam War more completely than do explanations that focus on the organizational cultures of professional militaries.     

要地防空指挥控制系统作战效能灰色聚类评估

建立要地防空指挥控制系统作战效能评估指标体系,运用层次分析法确定各层次指标权重,提出了一种基于灰色定聚类和中心点三角白化权函数的要地防空指挥控制系统作战效能灰色聚类评估方法,并通过算例对该方法的有效性进行了检验。结果表明该方法是切实可行的。     

Market entry strategy in the presence of market spillovers and efficiency differentiation

Firms form various alliances or use brand extensions to enter new markets in order to improve their operational efficiency and create a positive spillover. However, they do not always know the implications of these strategies for market entry and multimarket competition because the sale of products in one market can have negative spillover effects on product sales in other markets. We present an analytical framework to examine whether and how (i.e., by choosing alliance entry or independent entry) competing firms should enter a market in a situation where market spillovers occur when a firm enters a spillover-producing market to sell products that may increase or decrease the consumers' willingness to pay for products in the primary market. Our analysis shows that the operational efficiency (or quality differentiation ability) of firms in a spillover-producing market varies, and hence, the impact of market spillovers differs for firms. We identify the key factors, such as bargaining power, brand value difference in the primary market, and the extent of efficiencies and spillovers, that determine the firms benefitting from the different entry strategies. Specifically, we show that firms would be more willing to choose an alliance strategy to enter a spillover-producing market if the negative spillover is small and alliance efficiency is high. In contrast, if an alliance entry is not favored, the firms' relative operational efficiency is crucial for them to decide whether to enter the market independently under moderate spillover conditions. Finally, we show the implications of market entry strategies for managers.     

我国军民融合深度发展的内涵研究

如何理解军民融合深度发展,做好军民融合这篇大文章,各方面尚未形成统一共识。文章从历史沿革角度回顾分析了我国军民融合演变的过程、民融合深度发展的内涵,并在此基础上对当前存在的主要矛盾进行了研究总结,从国家战略部署层面提出了下一步发展建议。     

基于可组合服务的陆军作战仿真模型集成

陆军仿真模型体系的复杂性决定了其建模与集成的复杂度,本文基于模型组件化技术,设计了模型组件库、对象库,通过逻辑组合实现了基本库和作战单元库,并以可组合的模型服务实现不同分辨率、异构模型的聚合集成目标,使得陆军作战仿真模型具备模块化、可复用、可扩展和可控制的应用特点和战技术性能。     

自由曲面的立体视觉测量与加工一体化研究

对自由曲面的立体现觉测量与加工一体化技术中的图像匹配、曲面造型以及接口设计等问题进行了分析与讨论,并提出了切实可行的解决办法。     

N2O/C7H8单喷嘴燃气发生器试验研究

以基于N2O/C7H8的燃烧驱动混合型气动CO2激光器点火试验为研究背景,设计了液态N2O供应系统及N2O/C7H8单喷嘴燃气发生器.对液态N2O供应系统、N2O/C7H8的点火及燃烧性能进行了研究.试验结果表明:设计的N2O供应系统能够实现液态N2O的稳定供应;在设定的时序下,两个设计工况(余氧系数分别为0.3和0....