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101.
102.
在OPCW第18次水平考试土样中检测到一未知化合物,经多种分析技术测定,判断可能是甲基三硫代膦酸二乙酯.对合成甲基三硫代膦酸二乙酯的反应液进行了气相色谱一质谱测定,并对此反应液中的部分产物进行了质谱解析. 相似文献
103.
采用B/S模式和ASP技术,对基础实验教学系统进行了全新的设计,这种设计对强化基础实验教学的效果与质量将起到积极和有益的作用。 相似文献
104.
提出了随机服务系统的服务能力问题,给出有限服务能力的损失制M/M/1模型的描述和其稳态解,并求出了评价系统运行的几个主要数量指标。 相似文献
105.
Dunne, Smith, and Willenbockel (2005) argue that the mainstream growth literature has not found military spending to be a significant determinant of economic growth, yet much of the defense economics literature has noted significant effects. This paper revisits this issue by using a DSGE-VAR approach, combining both theoretical and empirical methods. We present that the DSGE approach (estimated with the Bayesian technique) and the Bayesian VAR with the Minnesota Prior both lead to worse in-sample fit than our proposed DSGE-VAR framework. The DSGE-VAR approach reveals that a positive military spending shock boosts the U.S. economy, increasing per capita real GDP growth, consumption, inflation and interest rate. Our results are robust to alternative model specifications. Future investigations such as exploring an optimal military spending policy could adopt the approach in this paper to determine the best model – empirical, theoretical, or a combination of the two. 相似文献
106.
Daniel J. Milton 《Contemporary Security Policy》2017,38(3):345-370
The goal of diplomats is to represent their countries’ interests through diplomacy, not arms. Because they are not military personnel, they may be perceived as at lower risk of being the target of terrorists. However, recent events have called this perception into question. Despite this danger, there has been little research on terrorist attacks against diplomats. Drawing on the terrorism studies literature, this article argues that diplomats are targeted more than non-diplomatic targets in countries where certain U.S. foreign policies are implemented. An empirical analysis of 471 attacks against U.S. diplomats from 1970 to 2011 reveals that while U.S. alliances and foreign aid increase the likelihood of attacks against diplomats, U.S. military intervention and civil war, on the other hand, increase the risk of terrorism against non-diplomatic targets. This finding is relevant because it shows terrorist attacks against diplomats result from certain types of foreign policy. 相似文献
107.
Jeffrey Michaels 《Contemporary Security Policy》2017,38(1):54-77
During the 2016 American presidential campaign, Democrats and Republicans alike repeatedly raised concerns at the prospect of Donald Trump being in charge of America’s nuclear arsenal based on his seemingly unstable personality. Unfortunately, this emphasis on Trump’s character distracted attention from any in-depth investigation into his long-standing interest in nuclear issues. This article seeks to remedy this shortcoming by highlighting the nuclear legacy Trump will inherit from Obama, surveying his statements on nuclear issues over more than three decades, and providing an analysis of constraining factors on his administration’s nuclear agenda, particularly domestic institutions. It finds that most of Trump’s views on nuclear issues are relatively consistent with past Republican presidents. Where he is unique, however, is in his use of social media, which has potential implications on nuclear signaling. 相似文献
108.
Wai Ki Ching 《海军后勤学研究》2001,48(1):65-78
This paper studies production planning of manufacturing systems of unreliable machines in tandem. The manufacturing system considered here produces one type of product. The demand is assumed to be a Poisson process and the processing time for one unit of product in each machine is exponentially distributed. A broken machine is subject to a sequence of repairing processes. The up time and the repairing time in each phase are assumed to be exponentially distributed. We study the manufacturing system by considering each machine as an individual system with stochastic supply and demand. The Markov Modulated Poisson Process (MMPP) is applied to model the process of supply. Numerical examples are given to demonstrate the accuracy of the proposed method. We employ (s, S) policy as production control. Fast algorithms are presented to solve the average running costs of the machine system for a given (s, S) policy and hence the approximated optimal (s, S) policy. © 2001 John Wiley & Sons, Inc. Naval Research Logistics 48: 65–78, 2001 相似文献
109.
A polling system comprising n queues and a single server is considered. Service is performed according to an elevator scheme under the globally gated regime. The problem of arranging the channels to minimize a measure of the variability of the waiting times is addressed. © 1997 John Wiley & Sons, Inc. Naval Research Logistics 44: 605–611, 1997 相似文献
110.
美国民营航天运输公司Space X创立十余年来,发展成绩斐然。与此同时,Space X是美国航天领域军民融合的一个侧影,其迅猛的发展历程反映出美国在航天领域以国家政策为牵引,以技术融合为抓手,以商业计划为支撑的军民融合发展特点,同时启示我国军民融合应通过强化政府搭台、宏观调控、物尽其用、绩效评估,以加速形成体制机制"军民互通"、军工市场"军民共荣"、基础资源"军民共享"、监督管理"军民共管"的繁荣持续的军民融合深度发展局面。 相似文献