甲B类液体全压力储罐消防设计问题研究

对沸点低于45℃的甲B类液体全压力储罐消防设计、审查过程中存在的问题进行了较为全面的分析,并针对这些问题提出了解决的方法,为进一步完善相关工程设计规范和有效地执行这些规范提供了实例,以期给同类工程提供有益借鉴.     

基于多假设跟踪弹道导弹主动段跟踪算法

针对弹道导弹主动段防御中多枚弹道导弹同时跟踪问题,提出了基于多假设思想的主动段跟踪算法.重点阐述了该算法中假设生成、假设概率计算、假设约简以及假设剪枝等环节.从工程实用的角度出发,采用求解一个线性分配问题(LAP)方法得到M个最优假设,大大减少了假设数量,并运用N-scan回溯剪枝方法对假设进行剪枝,确定要输出的航迹,提高了算法的效率和实用性.仿真实验表明,该算法能够对主动段多枚弹道导弹目标准确关联跟踪.     

面向多最优解组合优化问题的决策求解算法

针对具有固定物品总和、多最优解特征的组合优化问题,以固定总和实数子集问题和购买鸡翅问题为例,给出了这类多最优解组合优化问题的形式化表示。在分析枚举等经典算法基础上,提出了基于整数状态表示和实数状态表示的0-1决策递归搜索多最优解动态规划算法。针对该算法在最优解数量较大时,时间复杂度趋向O(mⁿ)的问题,提出了基于相同决策路径合并和基于0-x决策的两种改进算法。实验中两种改进算法的计算时间基本符合与O(nb+nm)的正比关系,表明对于这类多最优解组合优化问题具有良好的求解性能。     

A stochastic assignment problem

There are n boxes with box i having a quota value Balls arrive sequentially, with each ball having a binary vector attached to it, with the interpretation being that if X_i = 1 then that ball is eligible to be put in box i. A ball's vector is revealed when it arrives and the ball can be put in any alive box for which it is eligible, where a box is said to be alive if it has not yet met its quota. Assuming that the components of a vector are independent, we are interested in the policy that minimizes, either stochastically or in expectation, the number of balls that need arrive until all boxes have met their quotas. © 2014 Wiley Periodicals, Inc. 62:23–31, 2015     

Transformations of node‐balanced routing problems

This article describes a polynomial transformation for a class of unit‐demand vehicle routing problems, named node‐balanced routing problems (BRP), where the number of nodes on each route is restricted to be in an interval such that the workload across the routes is balanced. The transformation is general in that it can be applied to single or multiple depot, homogeneous or heterogeneous fleet BRPs, and any combination thereof. At the heart of the procedure lies transforming the BRP into a generalized traveling salesman problem (TSP), which can then be transformed into a TSP. The transformed graph exhibits special properties which can be exploited to significantly reduce the number of arcs, and used to construct a formulation for the resulting TSP that amounts to no more than that of a constrained assignment problem. Computational results on a number of instances are presented. © 2015 Wiley Periodicals, Inc. Naval Research Logistics 62: 370–387, 2015     

大中亚区域禁毒警务合作初探——以“金新月”毒品问题国际化为视角

面对“金新月”毒品问题日益国际化,在中亚各国复杂多变的政治、经济、民族、宗教背景下,迫切需要各方共同努力,创设、发展出一种更加灵活、高效、有针对性的禁毒合作机制,以应对该地区越来越严峻的毒品扩散问题及其引发的相关社会秩序危害。阐述了“金新月”毒情发展及其对周边国家的影响,分析了大中亚区域禁毒警务合作的必要性,探讨了大中亚禁毒警务合作模式的选择,以创设出一种立体的、全方位的、有较强执行力的区域禁毒合作模式。     

索契冬奥会安保措施探析

奥运会是世界上规模和影响力最大的体育赛事,因其具有参与人员多、受关注程度高等特点,极易成为恐怖袭击的目标.分析索契冬奥会面临的主要安全威胁和成功举办的安保经验,探讨我国举办冬奥会等大型活动的安保措施。     

《兵团教育学院学报》2009-2013年载文计量分析

《兵团教育学院学报》作为主要反映本校教学、科研及兵团中小学教育教学成果为内容的综合性学术理论刊物,在推动学校的学科建设、学术研究、培养人才及促进兵团各级各类教育发展等方面发挥着重大作用。本文对学报2009-2013刊登的学术论文进行了计量分析,厘清学报的发展脉络,同时也发现了学报中存在的一些问题如:特色栏目不突出,高质量稿源匮乏,学报宣传力度不大等并提出相应解决措施。     

二阶非线性常微分方程组边值问题的正解

研究一类二阶常微分方程组两点边值问题,利用Krasnoselskii’s不动点定理,得到当f和g满足超线性或次线性时边值问题一个正解存在的充分条件.     

Critics gone wild: Counterinsurgency as the root of all evil

The Western interventions in Iraq and Afghanistan have produced a heated polemic concerning the merits and demerits of counterinsurgency – the operational approach underpinning both campaigns. The two books reviewed here provide a good summation of the arguments against counterinsurgency: it is not a strategy and will fail when mistaken as such; its theory does not make intervention and war significantly easier; and even the most successful counterinsurgency campaigns have been bloody, violent, and protracted. Yet as this review highlights, beyond these central points, criticism of counterinsurgency is too often off the mark in its approach and totalizing in its pretentions. There is much to criticize and an urgent need to learn from past campaigns, yet bold claims and broad generalizations can mislead rather than enlighten. The analysis is particularly unhelpful when the definition of the central issue at hand – counterinsurgency – is being unwittingly or deliberately distorted. In the end, these two books form a poor basis for the debate that must now take place, because they are too ideological in tone, too undisciplined in approach, and therefore too unqualified in what they finally say.