青年军人思想政治工作逆反心理及疏导

部队思想政治工作中的逆反心理是发生在青年军人身上的一种较为普遍的心理现象,已成为影响部队思想政治工作效果的巨大障碍之一。在对逆反心理的内涵、表现和形成原因深入分析的基础上,有针对性地提出具体的疏导措施。     

地下公共娱乐场所防排烟设计

根据地下公共娱乐场所的结构特点和火灾特点,并结合某地下娱乐场所的防排烟设计,探讨如何进行防排烟设计,使其达到安全使用的目的。     

加强高校思想政治工作骨干队伍建设之我见

加强高校思想政治工作骨干队伍建设,是高等学校培养合格人才的需要,也是做好新形势下高校思想政治工作的关键所在。针对高校思想政治工作骨干队伍建设面临的困惑,应加强党、政、团干部队伍建设,加强政治理论课专业教师队伍建设。     

苏共思想教育工作失策对我军的启示

苏联剧变,有其多方面的原因。就意识形态来说,苏共思想教育工作的失策,导致全社会尤其是青年一代从意识形态迷茫,滑落到理想信念崩溃,无疑是政变的思想根源。分析苏共思想教育工作的经验教训,以便创新和改进我军思想政治教育的内容、形式和手段,促进思想政治教育工作的有效开展。     

Cyclic preference scheduling for nurses using branch and price

This paper presents a new methodology to solve the cyclic preference scheduling problem for hourly workers. The focus is on nurse rostering but is applicable to any organization in which the midterm scheduling decision must take into account a complex of legal, institutional, and preferential constraints. The objective is to strike a balance between satisfying individual preferences and minimizing personnel costs. The common practice is to consider each planning period independently and to generate new rosters at the beginning of each. To reduce some of the instability in the process, there is a growing trend toward cyclic schedules, which are easier to manage and are generally perceived to be more equitable. To address this problem, a new integer programming model is presented that combines the elements of both cyclic and preference scheduling. To find solutions, a branch‐and‐price algorithm is developed that makes use of several branching rules and an extremely effective rounding heuristic. A unique feature of the formulation is that the master problem contains integer rather than binary variables. Computational results are reported for problem instances with up to 200 nurses. Most were solved within 10 minutes and many within 3 minutes when a double aggregation approach was applicable. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007.     

超燃冲压发动机燃烧室燃料喷注及其内流场的数值模拟

基于三维N-S方程,利用有限差分数值离散方法,对考虑了燃料喷注和凹腔结构综合影响的某超燃冲压发动机燃烧室模型的内流场进行了数值模拟,与实验流动图谱进行了定性比较,并进一步探讨了燃料喷注过程的非定常特性以及凹腔结构对流动的影响。研究表明:本文数值模拟的稳态时刻流场与实验流动图谱相似;数值结果捕捉到了横向喷注燃料沿下游运动并向凹腔扩散的非定常动态变化的规律。     

Combining standardized time series area and Cramér–von Mises variance estimators

We propose three related estimators for the variance parameter arising from a steady‐state simulation process. All are based on combinations of standardized‐time‐series area and Cramér–von Mises (CvM) estimators. The first is a straightforward linear combination of the area and CvM estimators; the second resembles a Durbin–Watson statistic; and the third is related to a jackknifed version of the first. The main derivations yield analytical expressions for the bias and variance of the new estimators. These results show that the new estimators often perform better than the pure area, pure CvM, and benchmark nonoverlapping and overlapping batch means estimators, especially in terms of variance and mean squared error. We also give exact and Monte Carlo examples illustrating our findings.© 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

超声速扩压器中激波串结构的数值模拟

通过求解由BL湍流模型封闭的二维、轴对称及三维雷诺平均N S方程 ,数值模拟了等截面超声速扩压器中由激波 /附面层干扰诱导的复杂流场 ,比较了二维直管、圆截面直管及三维矩形截面直管中的流场特性、激波串长度及压强恢复程度。在来流马赫数为 3 0的二维直管计算中 ,采用四步Runge Kutta显式方法数值仿真了激波串自激振荡过程 ,并与实验结果作了对比分析     

基于 Taylor 展开的自由拉氏方法

导出了基于泰勒展开的自由拉氏方法 (简称为BTE方法 ) ,编制了一维程序 ,对激波管和飞片撞靶两个问题进行了数值模拟 ,所得结果与传统拉氏差分方法的结果一致。     

虚拟现实与仿真技术在火控系统中的应用

简述了虚拟现实(VR)的概念、基本特征及其系统体系结构,探讨了虚拟现实(VR)与系统仿真的关系,介绍了其在火控系统中的应用.