武器装备采办竞争与单一来源选择研究

在武器装备采办中对竞争与单一来源的选择应分析竞争的可行性与合意性。引入竞争必须要满足一些基本的必要条件，只有这样才会使竞争具有可行性。引入竞争还要分析竞争的合意性，即竞争是否值得，而这种合意与否的判断是建立在竞争的成本一收益分析基础之上的。只有同时满足“竞争可行”与“竞争合意”两个条件，武器装备采办才适宜引入竞争，否则应保持单一来源。     

工控机简易飞机模拟座舱设计与实现

基于工控机的简易飞机模拟座舱是针对现在综合模拟座舱造价高而飞行员和空地勤人员必须熟悉航电设备的要求而设计的一种模拟设备.首先介绍了简易模拟座舱的硬件、软件组成、功能、工作原理和实现过程,同时重点介绍了操纵杆和方向舵的传递模型.     

体育教学中如何培养学生的意志品质

意志品质是人们为达到既定目的而在行动所表现出来的自觉克服困难的心理过程。意志品质具体表现在鉴定的目的性;顽强性和果断性;勇敢创新精神。在体育教学中能否体现出意志品质的培养和有目的的是学生克服各种各样的困难完成意志行动,这对提高教学质量有很大的促进和发展作用。     

一种低精度捷联式惯导系统初始对准方法

捷联式惯导系统的对准,是指在系统进入工作前建立姿态矩阵的初始值。针对低精度捷联式惯导的初始对准,提出了基于捷联式惯导系统和双天线GPS测向系统组合的初始对准方案,并着重推导了失准角和陀螺常值漂移的计算过程,最后利用最小二乘法进行了实验验证,结果表明方法可行。     

Exact algorithms for scheduling multiple families of jobs on parallel machines

In many practical manufacturing environments, jobs to be processed can be divided into different families such that a setup is required whenever there is a switch from processing a job of one family to another job of a different family. The time for setup could be sequence independent or sequence dependent. We consider two particular scheduling problems relevant to such situations. In both problems, we are given a set of jobs to be processed on a set of identical parallel machines. The objective of the first problem is to minimize total weighted completion time of jobs, and that of the second problem is to minimize weighted number of tardy jobs. We propose column generation based branch and bound exact solution algorithms for the problems. Computational experiments show that the algorithms are capable of solving both problems of medium size to optimality within reasonable computational time. © 2003 Wiley Periodicals, Inc. Naval Research Logistics 50: 823–840, 2003.     

模拟训练平台的建设与部署

模拟训练在军事训练和应急平台建设中发挥着重要作用。以公安消防部队的应急训练需求为例，探讨了模拟训练平台的建设与部署。     

“迷狂式”构思状态及成因管窥

具有强烈的思想感情和丰富的想象，是中西方诗歌的共同特点。但由于中西方历史和文化背景等方面的不同，中西方诗歌在许多方面存在差异，中西方诗人构思时的情绪状态也有差异。中国有“虚静说”，西方有“迷狂说”。西方诗人的“迷狂式”构思状态亦有其产生的原因。     

The building evacuation problem with shared information

In this article, the Building Evacuation Problem with Shared Information (BEPSI) is formulated as a mixed integer linear program, where the objective is to determine the set of routes along which to send evacuees (supply) from multiple locations throughout a building (sources) to the exits (sinks) such that the total time until all evacuees reach the exits is minimized. The formulation explicitly incorporates the constraints of shared information in providing online instructions to evacuees, ensuring that evacuees departing from an intermediate or source location at a mutual point in time receive common instructions. Arc travel time and capacity, as well as supply at the nodes, are permitted to vary with time and capacity is assumed to be recaptured over time. The BEPSI is shown to be NP‐hard. An exact technique based on Benders decomposition is proposed for its solution. Computational results from numerical experiments on a real‐world network representing a four‐story building are given. Results of experiments employing Benders cuts generated in solving a given problem instance as initial cuts in addressing an updated problem instance are also provided. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008     

基于DSP的旋转弹用微小型导航系统设计

在无陀螺捷联惯导系统中,针对旋转弹体积小、功耗大、采样频率高、姿态变化快、解算周期短等问题。为满足旋转弹对其导航计算机的严格要求,提出了一种基于DSP的旋转弹用微小型导航系统设计,首先叙述了系统的总体方案设计,接着重点介绍了系统各模块的软硬件设计。本设计在硬件上节省了系统的体积和功耗,软件设计上节省了解算周期。     

都市圈石漠化区域采石场的生态恢复方法与措施探讨

都市圈石漠化区域采石场往往由于过度开发且未采取有效的恢复措施,致使生态环境破坏严重,严重影响了都市圈的生态环境和经济发展.在分析都市圈石漠化区域采石场生态恢复特点的基础上,论述了其生态恢复的基本方法及工程技术措施,指出都市圈石漠化区域采石场生态恢复应依据都市圈发展总体规划和景观生态学、景观建筑学及美学原理,采用开发性治理方法,综合运用多种工程技术措施恢复植被、整治水土流失并进行景观再造,从而满足都市圈对于景观的要求,提高土地利用价值,促进都市圈社会经济发展和城市生态环境建设.