高压纳秒脉冲形成电路的分析与设计

分析了储能线和储能电容脉冲发生器中各种因素对脉冲前沿的影响,比较了二者的优劣,并设计了一种储能线脉冲形成电路。初步的试验表明,该装置能产生脉宽为3～4ns的脉冲。     

红外脉冲强光辐射源中电爆丝爆炸机理研究

利用电爆丝的一种红外脉冲强光辐射新技术,从理论和实验上研究了电爆丝的爆炸机理。用电爆丝绝热加热模型数值模拟了电爆丝在冲击大电流作用下的电爆炸特性,电爆丝根数对电爆炸特性的影响。实验结果与理论模拟相一致。     

变阻抗传输线技术的理论研究

主要用数值模拟的方法研究了变阻抗传输技术,初步探索了变阻抗结构,揭示了阻抗渐变技术在超宽带高功率微波辐射研究中的重要意义。     

武器毁伤概率对火力运用的影响

采用离散马尔可夫链概型 ,在符合客观实际的基本假定条件下 ,以毁伤概率为指标 ,定量分析了对抗双方武器毁伤概率的变化对火力运用的影响 ,从而提出了先敌开火时机和火力运用样式转换时机对毁伤概率的要求     

The growth in military expenditure in Germany 1951–2011: did parties matter?

We examine whether government ideology was correlated with the growth in military expenditure in Germany over the period 1951–2011. Using various measures of government ideology, the results do not show any effect. The exception is an ideology measure based on the Comparative Manifesto Project (left-right scale): using this measure, the results show that the growth in military expenditure increased by about 2.4 percentage points, when the ideology variable (right-wing) increased by one standard deviation. This effect, however, is based on observations until the early 1960s and cannot be generalized. The major political parties agreed on how to evaluate international risks and threats. Government ideology retired to the background. We conjecture that the consensus among the major parties will persist – even if military spending needs to be increased in response to new international risks and threats.     

When the Going Gets Tough… Monitoring Missions and a Changing Conflict Environment in Sri Lanka, 2002–2008

This article analyzes how the conflict environment in which a civilian monitoring mission is deployed influences the monitors' assessment of the operation. It draws on unique empirical material from the experience of the Sri Lanka Monitoring Mission (SLMM), deployed to oversee a ceasefire agreement in Sri Lanka 2002–2008. With material from a survey and in-depth interviews, experiences of the monitors are analyzed and changes over time are traced in relation to the monitors' assessment of the mandate and organizational set-up of the mission. The study points to the difficulty of monitoring missions to address escalation during an ongoing peace process. Its function is dependent on the goodwill of the parties. In essence, monitoring missions have the potential to strengthen peace when there is momentum in favor of progress, but when relations between the parties turn sour and the conflict escalates a civilian monitoring mission basically loses its potential. During the final stages of the war, which saw a very large number of civilian casualties, the war-torn areas were closed to international observers. Moreover, international pressure for a short-term ceasefire to alleviate the humanitarian situation was dismissed by the Sri Lankan government, which also saw the backing of several important actors, not the least China.     

Bounded flexibility in days‐on and days‐off scheduling

This article presents a flexible days‐on and days‐off scheduling problem and develops an exact branch and price (B&P) algorithm to find solutions. The main objective is to minimize the size of the total workforce required to cover time‐varying demand over a planning horizon that may extend up to 12 weeks. A new aspect of the problem is the general restriction that the number of consecutive days on and the number of consecutive days off must each fall within a predefined range. Moreover, the total assignment of working days in the planning horizon cannot exceed some maximum value. In the B&P framework, the master problem is stated as a set covering‐type problem whose columns are generated iteratively by solving one of three different subproblems. The first is an implicit model, the second is a resource constrained shortest path problem, and the third is a dynamic program. Computational experiments using both real‐word and randomly generated data show that workforce reductions up to 66% are possible with highly flexible days‐on and days‐off patterns. When evaluating the performance of the three subproblems, it was found that each yielded equivalent solutions but the dynamic program proved to be significantly more efficient. © 2013 Wiley Periodicals, Inc. Naval Research Logistics 60: 678–701, 2013     

Panel Causality Analysis Between Defence Expenditure and Economic Growth in Developed Countries

There is much controversy in the literature over whether military expenditures have a positive, negative or no relation impact on economic growth. The aim of this paper is to determine the relationship between GDP and defence expenditure. The study analyses GDP and defence expenditures of the developed countries with cross-sectional ADF and SURADF unit root tests using annual data for the years 1980–2007. We conclude that in the long term, according to the Pedroni cointegration test, there exists a relationship between defence expenditure and economic growth. Furthermore, by utilizing the Granger causality test, we find that defence expenditure is a factor in economic growth. In other words, our study validates the hypothesis that defence spending by economically developed countries positively contributes to their economics.     

基于FMECA的信息系统软件失效安全风险评估与预测

随着大量软件产品应用于信息系统,不可避免地增大了软件失效对系统安全的影响概率。本文以某信息系统文电收发的处理过程为例,引入FMECA法,对其文电收发处理过程中由软件造成的风险进行分析,同时分析了引起风险常见的失效模式,并引入Markov模型对软件失效造成系统严重危害的风险进行预测,通过Markov模型与FMECA法结合能够迅速定位软件失效的原因,减少因软件失效造成的系统损失。