军事行政区主轴线空间节点秩序构建

结合营区规划实例,以军事行政区主轴线为研究对象,在分析现阶段军事行政区主轴线空间节点设计中比较集中存在的几个问题基础上,提出了构建军事行政区主轴线空间节点秩序及应遵循的一般原则,并以常见的入口区—广场区—办公区—训练区的轴线构成为例,对军事行政区主轴线各空间节点的秩序构建进行了空间、尺度及人性化等设计方法的探讨,为推动营区规划的正规化、现代化建设提供一些思路和方法。     

一种冲击信号调理电路的设计

针对测量冲击信号时,高冲击振动传感器输出的正负电荷信号不能直接被AD进行模数转换并且冲击信号中常常会混有噪声信号的问题,设计了一种包含电荷-电压转换、隔直放大、十阶抗混叠低通滤波等的冲击信号调理电路.并对冲击信号调理电路中各个模块进行了理论分析和节点参数的计算.通过实验:实际测量到的滤波曲线、冲击信号调理电路输出的电压都与理论计算值十分接近.此冲击信号调理电路能够成功地将传感器输出的正负电荷信号调理成一定范围内的电压信号,能够有效地滤除冲击信号中的高频噪声.     

改进的笛卡尔遗传编程组合电路演化设计

利用笛卡尔遗传编程进行电路演化时,存在收敛速度慢、收敛时间波动较大等问题．对笛卡尔遗传编程中的可编程单元模型进行改进,增加与目标函数相关的逻辑运算,去除无关的逻辑运算,从而提高演化算法命中目标的概率．利用改进的笛卡尔遗传编程方法分别对电机换相电路和乘法器等组合电路进行演化设计．结果表明,改进后的方法明显缩短了电路演化生成的时间,且收敛时间波动较小．     

Improving series and parallel systems through mixtures of duplicated dependent components

We discuss suitable conditions such that the lifetime of a series or of a parallel system formed by two components having nonindependent lifetimes may be stochastically improved by replacing the lifetimes of each of the components by an independent mixture of the individual components' lifetimes. We also characterize the classes of bivariate distributions where this phenomenon arises through a new weak dependence notion. © 2011 Wiley Periodicals, Inc. Naval Research Logistics, 2011     

电缆高辐射热通量下燃烧性能实验研究

利用锥形量热仪对国产典型PVC电缆进行实验研究,分析其在高辐射热通量条件下的热释放速率（HRR）、质量损失速率（MLR）、比消光面积（SEA）、CO产率、火灾性能指数（FPI）、点燃时间（TTI）随直径的变化规律,以及不同热辐射通量对这些燃烧参数的影响。实验结果表明：在相同实验条件下,PVC电缆的HRR、MLR、SEA、CO产率均随直径的增大而增大,FPI随直径的增大而减小,火灾危险性增大;电缆直径的变化对点燃时间影响不大;随着热辐射通量的增大,PVC电缆的点燃时间缩短,HRR、MLR增大,其峰值也增大,烟释放速率（SPR）和总烟释放量（TSR）增加,FPI减小,火灾危险性增大。     

边防武警执行命令行为的性质定位

边防武警具有军人和警察的双重属性,因此,其执行命令行为在性质上不同于普通的军事命令,而体现出一定的行政性特征。边防武警执行命令行为的性质定位直接关系到其执行多样化军事任务中各项行为的法律后果,具有重要的理论意义和司法实践意义。     

On vibration analysis of functionally graded carbon nanotube reinforced magneto-electro-elastic plates with different electro-magnetic conditions using higher order finite element methods

This article deals with evaluating the frequency response of functionally graded carbon nanotube rein-forced magneto-electro-elastic (FG-CNTMEE) plates subjected to open and closed electro-magnetic cir-cuit conditions. In this regard finite element formulation has been derived. The plate kinematics adjudged via higher order shear deformation theory (HSDT) is considered for evaluation. The equations of motion are obtained with the help of Hamilton's principle and solved using condensation technique. It is found that the convergence and accuracy of the present FE formulation is very good to address the vibration problem of FG-CNTMEE plate. For the first time, frequency response analysis of FG-CNTMEE plates considering the effect of various circuit conditions associated with parameters such as CNT dis-tributions, volume fraction, skew angle, aspect ratio, length-to-thickness ratio and coupling fields has been carried out. The results of this article can serve as benchmark for future development and analysis of smart structures.     

Sojourn time analysis of a queueing system with two‐phase service and server vacations

We consider a two‐phase service queueing system with batch Poisson arrivals and server vacations denoted by M^X/G₁‐G₂/1. The first phase service is an exhaustive or a gated bulk service, and the second phase is given individually to the members of a batch. By a reduction to an M^X/G/1 vacation system and applying the level‐crossing method to a workload process with two types of vacations, we obtain the Laplace–Stieltjes transform of the sojourn time distribution in the M^X/G₁‐G₂/1 with single or multiple vacations. The decomposition expression is derived for the Laplace–Stieltjes transform of the sojourn time distribution, and the first two moments of the sojourn time are provided. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

最大面积避障矩形问题的解法

建立了在一个含有若干障碍点的矩形母域内求一个最大面积避障矩形问题的数学模型.通过分析避障矩形的几何特性,找到了求解这一含有0-1变量的非线性规划数学模型的一种特殊解法.     

Orbix的分布对象计算性能分析

通过一个计数器的分布对象设计及Orbix实现,阐明了先进的分布对象技术标准CORBA的核心概念以及符合CORBA2．0标准的中间件产品Orbix的分布对象设计和实现过程,通过计算比较并分析了Orbix在单机和网络分布环境下实现效率的差异,并提出了用单机模拟网络环境下分布对象实现效率的方法．