电传动履带车辆转向行驶控制策略仿真研究

以双侧电机独立驱动这一典型电传动方案为研究对象,针对转向行驶控制的难题,提出了基于功率-转速复合调节的转向行驶控制策略,对驾驶员操控信号进行了解析,基于Matlab软件和RecurDyn软件建立了电传动车辆的机电一体联合仿真模型,对车辆典型转向工况进行了仿真试验,验证了转向行驶控制策略的有效性。     

混合均衡问题和不动点问题的公共元的迭代算法

在Hilbert空间中,利用超梯度算法,用以逼近混合均衡问题的解集与半压缩映像不动点集的公共元,并且证明了该算法的收敛性。使用新的分析技巧证明了一个强收敛定理。     

A mathematical programming approach for improving the robustness of least sum of absolute deviations regression

This paper discusses a novel application of mathematical programming techniques to a regression problem. While least squares regression techniques have been used for a long time, it is known that their robustness properties are not desirable. Specifically, the estimators are known to be too sensitive to data contamination. In this paper we examine regressions based on Least‐sum of Absolute Deviations (LAD) and show that the robustness of the estimator can be improved significantly through a judicious choice of weights. The problem of finding optimum weights is formulated as a nonlinear mixed integer program, which is too difficult to solve exactly in general. We demonstrate that our problem is equivalent to a mathematical program with a single functional constraint resembling the knapsack problem and then solve it for a special case. We then generalize this solution to general regression designs. Furthermore, we provide an efficient algorithm to solve the general nonlinear, mixed integer programming problem when the number of predictors is small. We show the efficacy of the weighted LAD estimator using numerical examples. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2006     

战场态势转化指挥策略分析

介绍了战场态势的转化规律,构建了考虑时变武器正常发挥因子、增援和非战斗减员的兰切斯特方程,运用此方程定量分析了能促成战场态势由劣转优的两种指挥策略,最后提出了一些作战研究建议.     

海上犯罪案件的特点及侦查方略研究

随着海洋经济的迅速发展,海上人、财、物的流动急剧增加,海上治安形势日趋复杂。海上抢劫、盗窃、偷渡及贩枪贩毒等犯罪活动呈多发态势,这严重破坏了海上的生产作业秩序,危害了海上治安秩序的稳定。研究海上犯罪案件的特,点,有助于公安边防部门采取有针对性的侦查方略,有力地打击海上犯罪,以创造安全、有序的海上治安环境。     

论边防行政复议存在的问题及对策

边防行政复议是规范边防行政执法和对边防行政执法相对人权益进行救济的重要途径。当前边防行政复议主要存在立法不完善、复议机构设置不完善、复议工作人员法律素质偏低、复议案件审查程序不严谨等方面的问题。加强和完善边防行政复议,主要应从立法、机构设置、转变观念等方面入手。     

外语受蚀时间对语言学习策略使用频率的影响

调查外语受蚀时间对语言学习策略使用频率的影响。调查发现,学习者学习策略的使用频率,特别是记忆策略、认知策略和补偿策略的使用频率,随着受蚀时间的增加逐渐降低。     

“神话重述”的策略及其实践——以苏童的《碧奴》为例

“重述神话”的写作策略及其实践立足于民族神话的精神源泉,把神话的寓意和象征以及民族心理的把握有机结合起来,采用暗示和寓言的策略,从本土文化中演绎文学的构想并注入诗意的因素,力图凸显传统与现代接壤的特质。     

收发合置情况下海底混响仿真

为了实现收发合置情况下海底混响时间序列仿真,提出了一种混合模型方法。该方法将点散射模型方法与单元散射模型方法混合使用,既能够克服单元散射模型方法中高斯分布假设带来的计算误差,又能够克服点散射模型方法计算复杂的问题。针对窄带发射信号,为了便于计算,设计了一种适用于任意采样率的基于复包络的混响信号仿真方法。最后,通过仿真试验证实了仿真方法的有效性。     

Inventory sharing under decentralized preventive transshipments

We consider preventive transshipments between two stores in a decentralized system with two demand subperiods. Replenishment orders are made before the first subperiod, and the stores may make transshipments to one another between the subperiods. We prove that the transshipment decision has a dominant strategy, called a control‐band conserving transfer policy, under which each store chooses a quantity to transship in or out that will keep its second‐subperiod starting inventory level within a range called a control band. We prove that the optimal replenishment policy is a threshold policy in which the threshold depends on the capacity level at the other store. Finally, we prove that there does not exist a transfer price that coordinates the decentralized supply chain. Our research also explains many of the differences between preventive and emergency transshipments, including differences in the optimal transfer policies and the existence or nonexistence of transfer prices that coordinate the system. © 2010 Wiley Periodicals, Inc. Naval Research Logistics, 2010