基于金属膜电阻的大功率低电感负载

利用金属膜电阻设计并制作了用于陡化前沿Marx发生器调试的大功率低电感负载.其阻值约为90Ω,电感约为55nH,基本不具备分散电容.该负载采用线性渐变的圆锥外型结构,有利于减小信号在负载上的反射,配合电容分压器使用能够很好地完成对前沿约为几ns的快前沿高压脉冲的测量.理论估算了该负载的功率容量,并利用PSpice软件模拟了对其进行脉冲方波加载的情况.该负载用于调试陡化前沿的Marx发生器的实验中,获得了幅值约210kV,脉宽近40ns,前沿为5ns的快前沿高压脉冲.多次实验结果表明该负载性能稳定,适用于陡化前沿Marx发生器的调试工作.     

An integrated electric power supply chain and fuel market network framework: Theoretical modeling with empirical analysis for New England

In this article, we develop a novel electric power supply chain network model with fuel supply markets that captures both the economic network transactions in energy supply markets and the physical network transmission constraints in the electric power network. The theoretical derivation and analysis are done using the theory of variational inequalities. We then apply the model to a specific case, the New England electric power supply chain, consisting of six states, five fuel types, 82 power generators, with a total of 573 generating units, and 10 demand market regions. The empirical case study demonstrates that the regional electric power prices simulated by our model match the actual electricity prices in New England very well. We also compute the electric power prices and the spark spread, an important measure of the power plant profitability, under natural gas and oil price variations. The empirical examples illustrate that in New England, the market/grid‐level fuel competition has become the major factor that affects the influence of the oil price on the natural gas price. Finally, we utilize the model to quantitatively investigate how changes in the demand for electricity influence the electric power and the fuel markets from a regional perspective. The theoretical model can be applied to other regions and multiple electricity markets under deregulation to quantify the interactions in electric power/energy supply chains and their effects on flows and prices. © 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2009     

Information security: Designing a stochastic‐network for throughput and reliability

Todas information and communication network requires a design that is secure to tampering. Traditional performance measures of reliability and throughput must be supplemented with measures of security. Recognition of an adversary who can inflict damage leads toward a game‐theoretic model. Through such a formulation, guidelines for network designs and improvements are derived. We opt for a design that is most robust to withstand both natural degradation and adversarial attacks. Extensive computational experience with such a model suggests that a Nash‐equilibrium design exists that can withstand the worst possible damage. Most important, the equilibrium is value‐free in that it is stable irrespective of the unit costs associated with reliability vs. capacity improvement and how one wishes to trade between throughput and reliability. This finding helps to pinpoint the most critical components in network design. From a policy standpoint, the model also allows the monetary value of information‐security to be imputed. © 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2009     

基于LBDL逻辑的抗DPA攻击电路设计方法

动态差分逻辑是一种典型的电路级差分功耗攻击(DPA)防护技术.这种技术通过使逻辑门保持恒定的翻转率来降低电路功耗与数据信号之间的相关性.介绍了一种新型的、基于查找表(Look-Up-Table,LUT)结构的动态差分逻辑(LBDL),以及基于这种逻辑的集成电路设计方法.该设计方法仅需在传统的半定制设计流程中添加少量的替换操作就可以实现 ,因而比其他完全需要全定制设计的动态差分逻辑具有更好的实用性.而相对同样适用于半定制实现的动态差分逻辑 WDDL(Wave Dynamic Differential Logic),LBDL逻辑解决了逻辑门翻转时刻与数据信号之间的相关性,从而比WDDL逻辑具有更好的功耗恒定性.实验结果表明,该设计方法能够有效实现具有抗DPA攻击性能的电路.     

爆炸逻辑间隙零门实验研究

为了可靠实现爆炸逻辑间隙零门的原理功能,提出并验证了一种基于精细RDX和含能胶合剂的传爆药方案.通过实验探索了基于该传爆药的爆炸零门适用的间隙宽度范围,并设计了一种小尺寸爆炸逻辑间隙零门,为爆炸逻辑网络设计提供参考.     

Interdiction models for delaying adversarial attacks against critical information technology infrastructure

Information technology (IT) infrastructure relies on a globalized supply chain that is vulnerable to numerous risks from adversarial attacks. It is important to protect IT infrastructure from these dynamic, persistent risks by delaying adversarial exploits. In this paper, we propose max‐min interdiction models for critical infrastructure protection that prioritizes cost‐effective security mitigations to maximally delay adversarial attacks. We consider attacks originating from multiple adversaries, each of which aims to find a “critical path” through the attack surface to complete the corresponding attack as soon as possible. Decision‐makers can deploy mitigations to delay attack exploits, however, mitigation effectiveness is sometimes uncertain. We propose a stochastic model variant to address this uncertainty by incorporating random delay times. The proposed models can be reformulated as a nested max‐max problem using dualization. We propose a Lagrangian heuristic approach that decomposes the max‐max problem into a number of smaller subproblems, and updates upper and lower bounds to the original problem via subgradient optimization. We evaluate the perfect information solution value as an alternative method for updating the upper bound. Computational results demonstrate that the Lagrangian heuristic identifies near‐optimal solutions efficiently, which outperforms a general purpose mixed‐integer programming solver on medium and large instances.     

智能化作战指挥模式需求

智能装备已经走入军队、走向战场,创建智能化作战指挥模式是智能化时代作战指挥的必然发展趋势,智能化作战指挥模式需求分析可为智能作战问题研究提供有效的信息。智能化作战指挥模式的需求分析已经具备了一定的物质、理论和技术基础,同时,也具有了一定的构建思路、实践条件和实验平台。在此基础上,本文从军事需求、功能需求和技术需求以及构建要求四个不同角度进行需求分析,以找准创建需求,为后续工作进一步展开奠定基础。     

基于大数据分析的网络管理智能化

军事通信网综合管理系统中,各专业网络运行情况的主要数据都可汇总到综合网管数据库中。这些网管数据中隐含了网络运行的几乎全部信息,但即使是最有经验的网络管理专家面对这些繁杂的数据也只能望洋兴叹。面对大数据的智能分析技术则有可能实现网络运行态势的高度可视化,充分理解和详细把握全网运行状态,像知识、经验、联想丰富的专家一样不知疲倦地对网络运行状况进行全面细致地分析,从海量的网管数据中发现网络故障的蛛丝马迹,发现隐含的问题,预知网络变化。论文介绍了利用大数据分析技术实现网络管理智能化的现实目标,基于性能的网络异常预测预报、基于性能和事件的故障分析诊断、网络运行知识的挖掘利用等方面的功能和技术途径。     

区块链在分队战术协同中的应用构想

从战术分队角度出发,探讨了区块链技术在作战实体之间的信息交互及智能协同方面的应用设想,分析了战术分队信息交互的相关技术及面临的挑战,阐述了区块链在未来战术分队指挥体系构建中的发展构想。     

空降作战的制约因素及前瞻

空降力量是联合作战力量的重要组成部分,空降作战是实施高技术条件下作战的重要手段,因此也是各国争相研究的课题,而空降作战指挥是制约空降作战效能发挥的主要因素。本文从空降作战指挥的特点出发,剖析了空降作战指挥的影响因素,通过对现代战争的形势分析对空降作战指挥的发展趋势做出了合理的预判。 