Hash技术在消防产品信息检索中的应用

讨论了消防产品的身份证管理制度,针对跟踪管理系统中移动终端查询速度较慢的问题,将Hash技术应用到产品信息检索中,并对全国消防产品数据库中采集的数据进行了实验测试.实验结果表明,Hash技术用于移动终端大规模数据的检索具有简单高效的特点.     

装备故障诊断和预测技术综述

结合故障诊断与预测技术的国内外研究现状,综述了故障诊断和预测的完整性认知模型,并以此对蓬勃发展的故障诊断和故障预测技术进行了分类与综合分析。同时针对故障的不确定性特征,对故障诊断和预测技术的性能要求、定量评价与验证方法进行了分析。最后,分别从实际应用及扩展的四个方面提出了故障诊断、预测,以及PHM技术未来发展的几个问题。     

制冷系统节能目标函数的研究

本文分析传统采用制冷系数(EER)作为节能指标的不准确性,提出采用(?)效率作为衡量制冷装置在不同工况下运行的节能指标。从(?)效率定义出发推导出带回热的制冷系统的(?)效率关系式,这为寻找装置最佳运行工况提供理论依据,并通过实验证实了理论的分析。     

KD-RTI/DDM中的组播分配策略

组播技术的应用可以有效提高RTI的实现性能。介绍了组播分配的一般理论和实现方案,详细展示了KD RTI中的组播分配策略,讨论了组播应用过程中出现的问题,同时给出了解决方法。     

Serious Rules for Nuclear Power Without Proliferation

The authors propose five principles for addressing the major deficiencies of the current treaty-based approach to nonproliferation. These involve: effectively closing the door to withdrawals from the Treaty on the Non-Proliferation of Nuclear Weapons (NPT); defining which nuclear technologies fall within the NPT's “inalienable right” provision, so as to maintain a reasonable safety margin against possible military application; expansion of International Atomic Energy Agency inspections to include greater readiness to use its “special” inspection authority; creation of an NPT enforcement regime, to include a secretariat; and universalizing the NPT so as to apply to all states, while creating a path for current non-parties to come into compliance. There is no illusion here about the prospects for the adoption of this approach. At a minimum, the world needs to be frank about the gap between nuclear programs and current nonproliferation protection. Encouragement of greater use of nuclear power should be predicated on closing that gap.     

INVESTIGATING THE RUBBLE OF SYRIA'S SECRET REACTOR

Damascus has severely impeded an investigation by the International Atomic Energy Agency (IAEA) into Syria's construction of a covert nuclear reactor, which was destroyed in a 2007 Israeli air strike. Pressing Damascus to cooperate with the inquiry is necessary to ascertain that there are no other undeclared activities in Syria, to determine the role of North Korea in the construction of the reactor, and to help prevent future clandestine efforts. With Damascus doing its best to avoid the investigation, securing Syrian cooperation will require adept diplomacy backed by the prospect of special inspections and, if necessary, a referral to the UN Security Council. The case of Syria's secret reactor highlights areas in which the IAEA needs buttressing, from the enhanced sharing of information, to reporting that is less political and more forthright. The case also illustrates the downside of politicizing IAEA investigations and supports the new director's apparent intent to return the agency to its core technical tasks.     

EXPORT CONTROLS AND INTERNATIONAL SAFEGUARDS

Export controls and international safeguards are central to ensuring international confidence in the peaceful uses of nuclear materials and technologies and to achieving adequate oversight on the transfer and use of nuclear materials, technology, and equipment required for the development of proliferation-sensitive parts of the nuclear fuel cycle. Although the independent strengths of export controls and international safeguards rely largely on universal adherence, there may be opportunities to exploit the shared strengths of these systems. This article provides background information on the separate evolution of export controls and international safeguards, considers how these two elements of the nonproliferation regime interact, and identifies some possible avenues that could, over time, lead to wholly integrated activities.     

THE HEALTH OF THE NUCLEAR NONPROLIFERATION REGIME

How do we assess the health of international regimes? Many analysts have insisted recently that the nuclear nonproliferation regime is in urgent need of repair or that it should even be discarded because of its supposed ineffectiveness. However, it is essential that statements about the regime being in crisis be scrutinized for veracity and utility. While the spread of nuclear weapons poses an undeniable and serious threat to international security, a mistaken crisis mentality with respect to the regime could lead to rash attempts to alter it in unnecessary or ineffective ways or, at worst, to discard it completely. This paper returns to a theoretical framework that differentiates regimes, across both issue areas and time, to provide a more specified evaluation of regime health. By disaggregating the nuclear nonproliferation regime and assessing the individual and interactive health of multiple dimensions, a number of dimension-specific, regime-strengthening policy recommendations emerge.     

姿态角单次调整的固体运载火箭耗尽关机能量管理方法

固体运载火箭传统耗尽关机制导方法姿态角调整次数过多,不利于控制系统设计。提出了姿态角单次调整的耗尽关机能量管理策略:以火箭的待增视速度方向为基准,通过计算火箭所需耗费的视速度,优化选取火箭的初、末姿态角;火箭以恒定角速率从初姿态角变为末姿态角,达到末姿态角时保持恒定,直至耗尽关机。仿真结果表明,新方法在满足火箭的终端速度约束条件下,视速度模量耗费百分比超过30%,且姿态角单向调整,有利于控制系统的工程设计。     

Germany’s Answer to Standard Oil: The Continental Oil Company and Nazi Grand Strategy, 1940–1942

German grand strategy during World War II included making Europe independent of oil imported from sources controlled by the United Kingdom, the United States, and the USSR. The first step was to wrest control of oilfields. Producing and distributing the oil, however, required the creation of a company capable of replacing the evicted British, American, and Soviet suppliers. Therefore, in 1941, the Third Reich established the Continental Oil Company. Analysis of the company’s foundation and operations sheds light on the objectives of the Third Reich, including the postwar economic development of Axis Europe and the extension of German hegemony beyond the USSR into the Middle East.