A specially structured nonlinear integer resource allocation problem

We present an algorithm for solving a specially structured nonlinear integer resource allocation problem. This problem was motivated by a capacity planning study done at a large Health Maintenance Organization in Texas. Specifically, we focus on a class of nonlinear resource allocation problems that involve the minimization of a convex function over one general convex constraint, a set of block diagonal convex constraints, and bounds on the integer variables. The continuous variable problem is also considered. The continuous problem is solved by taking advantage of the structure of the Karush‐Kuhn‐Tucker (KKT) conditions. This method for solving the continuous problem is then incorporated in a branch and bound algorithm to solve the integer problem. Various reoptimization results, multiplier bounding results, and heuristics are used to improve the efficiency of the algorithms. We show how the algorithms can be extended to obtain a globally optimal solution to the nonconvex version of the problem. We further show that the methods can be applied to problems in production planning and financial optimization. Extensive computational testing of the algorithms is reported for a variety of applications on continuous problems with up to 1,000,000 variables and integer problems with up to 1000 variables. © 2003 Wiley Periodicals, Inc. Naval Research Logistics 50: 770–792, 2003.     

朝核问题对中国边境安全的影响

朝核问题一直是困扰东北亚地区安全的核心问题，自20世纪90年代第一次朝核危机至今．朝核问题不但没有得到妥善解决，反而更加复杂。2006年10月9日，朝鲜宣布成功进行了地下核试验，朝鲜半岛再一次成为全球关注的焦点。在前人研究的基础上，就朝核问题产生的背景，朝核问题对中国边境地区经济、地区稳定以及生态环境等方面产生的影响进行分析和探讨。     

消防无线通信存在问题及对策研究

介绍了我国消防无线通信在灭火救援中的重要性，重点从消防通信装备的配备、技术和管理等方面分析了消防无线通信在使用中存在的问题，并提出了解决这些问题的对策。     

建筑防排烟系统存在问题及对策

结合火灾烟气蔓延扩散的客观规律和防排烟工程的实际状况，分析了建筑防排烟工程存在的几个共性问题及其危害，剖析了出现这些问题的根本原因，提出了尽快制定一部统一的《防排烟系统设计规范》、加强防排烟系统的设计、施工队伍监督管理和部件质量管理的对策。     

我国现行工程建设消防技术标准存在问题及解决对策

工程建设消防技术标准是公安消防机构审核、验收及工程技术人员设计、施工及验收的依据,也是公安消防机构进行日常监督检查和执法的技术依据。然而,目前我国现行工程建设消防技术标准的编制仍存在一些不完善的方面,影响了这些标准的有效执行。在对当前各类工程建设消防技术标准进行分析的基础上,总结了现行工程建设消防技术标准亟待完善的若干方面,并对此提出相关建议。     

Solving generalized transportation problems via pure transportation problems

This paper investigates certain issues of coefficient sensitivity in generalized network problems when such problems have small gains or losses. In these instances, it might be computationally advantageous to temporarily ignore these gains or losses and solve the resultant “pure” network problem. Subsequently, the optimal solution to the pure problem could be used to derive the optimal solution to the original generalized network problem. In this paper we focus on generalized transportation problems and consider the following question: Given an optimal solution to the pure transportation problem, under what conditions will the optimal solution to the original generalized transportation problem have the same basic variables? We study special cases of the generalized transportation problem in terms of convexity with respect to a basis. For the special case when all gains or losses are identical, we show that convexity holds. We use this result to determine conditions on the magnitude of the gains or losses such that the optimal solutions to both the generalized transportation problem and the associated pure transportation problem have the same basic variables. For more general cases, we establish sufficient conditions for convexity and feasibility. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 666–685, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10034     

A strategic model for state compliance verification

The theory of directed graphs and noncooperative games is applied to the problem of verification of State compliance to international treaties on arms control, disarmament and nonproliferation of weapons of mass destruction. Hypothetical treaty violations are formulated in terms of illegal acquisition paths for the accumulation of clandestine weapons, weapons‐grade materials or some other military capability. The paths constitute the illegal strategies of a sovereign State in a two‐person inspection game played against a multi‐ or international Inspectorate charged with compliance verification. The effectiveness of existing or postulated verification measures is quantified in terms of the Inspectorate's expected utility at Nash equilibrium. A prototype software implementation of the methodology and a case study are presented. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 260–271, 2016     

机载脉冲多普勒雷达的自适应旁瓣对消实现方法

简要介绍了自适应旁瓣对消的基本原理。重点研究了自适应旁瓣对消在机载脉冲多普勒雷达中的工程实现方法,该方法打破了自适应旁瓣对消目前只能应用于采用低重脉冲重复周期的脉冲多普勒雷达的限制。通过对自适应旁瓣对消结果的分析,表明该方法完全能够满足现有机载脉冲多普勒雷达抗有源旁瓣干扰的需求。     

环境新闻在中国的发展及其特征简析

环境问题已经成为一大社会问题，环境新闻成为媒体和公众关注的焦点。国内环境新闻作为一个新兴的报道题材，已迅速闯进主要新闻传媒的主阵地，并逐渐成为与时政新闻、经济新闻、科技新闻等并驾齐驱的报道领域，成为各家传媒和记者争相采访报道的重要内容。本文从环境新闻的概念与产生入手，分析其在中国的发展。