Potential impact of recharging plug‐in hybrid electric vehicles on locational marginal prices

Plug‐in hybrid electric vehicles (PHEVs), upon market penetration, will create additional recharging loads to the electric power systems. This article considers different recharging scenarios and uses game theoretic models to study the potential impact of the recharging loads on locational marginal prices (wholesale electricity prices). Computational results from a Pennsylvania‐New Jersey‐Maryland Interconnection case study show that, under the existing recharging infrastructures, even a small magnitude of load increase caused by PHEV recharging could have a significant undesirable impact on locational marginal prices. The impact could be mitigated to a varying extent by the availability of possible future recharging infrastructures, including realtime pricing recharging meters, battery stations, or vehicle‐to‐grid technology.© 2010 Wiley Periodicals, Inc. Naval Research Logistics, 2010     

A bivariate optimal replacement policy for a cold standby repairable system with repair priority

In this article, an optimal replacement policy for a cold standby repairable system consisting of two dissimilar components with repair priority is studied. Assume that both Components 1 and 2, after repair, are not as good as new, and the main component (Component 1) has repair priority. Both the sequence of working times and that of the components'repair times are generated by geometric processes. We consider a bivariate replacement policy (T,N) in which the system is replaced when either cumulative working time of Component 1 reaches T, or the number of failures of Component 1 reaches N, whichever occurs first. The problem is to determine the optimal replacement policy (T,N)* such that the long run average loss per unit time (or simply the average loss rate) of the system is minimized. An explicit expression of this rate is derived, and then optimal policy (T,N)* can be numerically determined through a two‐dimensional‐search procedure. A numerical example is given to illustrate the model's applicability and procedure, and to illustrate some properties of the optimal solution. We also show that if replacements are made solely on the basis of the number of failures N, or solely on the basis of the cumulative working time T, the former class of policies performs better than the latter, albeit only under some mild conditions. © 2010 Wiley Periodicals, Inc. Naval Research Logistics, 2010     

基于双向映射的非网格型全向图展开插值方法

原始的全向图存在严重的同心圆环状变形,通常需展开为更适合人眼观察的柱面全景图像。结合折反射全向成像特点,提出一种基于双向映射的全向图展开为柱面全景图像的插值方法,通过光路跟踪得到图像间的坐标映射关系,将所要生成的柱面全景图中每一点正向映射到原始的全向图中,确定插值邻域点;将这些邻域点逆向投影到柱面全景图中,针对邻域点在柱面全景图中呈非网格型分布的特点,采用非均匀二维插值算法进行图像插值运算。该方法既准确地定位插值邻域点,又避免了全向图的非线性畸变对邻域点权重计算的不利影响。实验证明该方法能有效提高插值精度和展开后图像的质量。     

论军事人才的信息素质

新形势下加强高素质新型军事人才队伍建设,必须高度重视军事人才信息素质培养,在明确军事人才信息素质基本内涵基础上,准确把握不同类型军事人才信息素质的特征,实施差异化培养,为推进军队建设整体转型提供有力支撑.     

军工企业质量信息管理浅谈

质量信息管理是军工企业开展质量管理体系建设的重要环节,质量信息为企业质量决策、改进、考核等方面提供了有力依据,其特性也为企业的质量活动提供了基础,掌握质量信息管理的主要形式是提高军工企业质量管理的重要手段。     

面向嵌入式火控软件的划分测试设计

根据嵌入式火控软件的数据特点 ,设计了相应的划分测试原则。并以某型坦克火控软件的实验数据对比了划分测试与随机测试的覆盖率 ,总结出对于该类软件划分测试具有一定的优势     

大型商场人员密度调查与分析

以天津市几个大型商场为代表,按照商场的经营性质、建筑规模将大型商场分为三类,分别选取节假日、双休日、正常工作日为调查时间,得到各类大型商场疏散人数的原始数据.采用正态总体均值与方差的区间估计原理,得出各类商场的疏散人数区间.同时,对营业厅建筑面积和顾客使用面积进行相应的调查.得到面积折算系数.利用调查分析结果,在保证安全性和经济性的前提下,提出不同类型商场的人员密度指标.     

警务实战行动中的“危险评估”刍议

警务实战行动情况错综复杂,充满突变性,极具危险性,警察执法危险系数呈上升趋势。如何对警务实战行动中所面临的危险进行及时、准确、全面、客观的评估,从而提高其成功率和效率,是每个参战警察必须具备的执法能力。     

末端防空武器系统对巡航导弹的作战效能分析

根据美国工业界武器系统效能咨询委员会对作战效能的定义,针对末端防空武器系统拦截巡航导弹的作战使用特点,给出了其作战效能分析模型的解析法表述;建立了末端防空武器系统和巡航导弹的攻防对抗模型;最后对该模型进行了数学仿真验证,并分析了影响末端防空作战效能的主要因素.结果表明,可以从提高武器系统的小目标能力和雷达的低空性能,及建立多层防空体系等方面提高抗击巡航导弹的作战效能.     

高校资源环境类专业开设资源与环境法课程的意义

资源与环境法是高校法学类的核心课程,目前,该课程已经逐渐在资源环境类专业中不同程度的开设。高校资源环境类专业开设资源与环境法课程是非常必要而且很有意义的,（1）文章从开设资源与环境法课程有助于强化学生的环境法制教育;（2）开设资源与环境法课程有助于完善资源环境类专业的学科体系;（3）开设资源与环境法课程有利于大学生参与保护环境的实践活动;（4）开设资源与环境法课程有助于学生了解常识;（5）资源环境法课程的开设有利于丰富教学授课形式等5个方面论证了其意义性。