弹用红外干扰发烟剂研制

对铜基红外干扰发烟剂的配方及影响配方性能的主要因素进行了实验研究，并对其性能进行了测试。结果表明，该发烟剂不仅对中、远红外光具有优良的干扰能力，而且对可见光、激光也具有良好的遮蔽能力。该发烟剂还具有装填密度大，不导电，耐高、低温性能、相容性和稳定性能良好等特点。     

铜基红外干扰发烟剂性能影响因素

重点研究了铜粉粒度、铜含量、添加剂及配方组成和配比等因素对铜基发烟剂红外消光性能的影响，同时也研究了包覆剂及制药工艺对发烟剂性能的影响。并且对测试结果及相关问题进行了分析讨论。     

一种新型双簇头分簇算法的性能研究

提出了一种新的双簇头分簇算法,该算法在单簇头分簇算法的基础上增加了一个备用簇头节点,在簇头节点能量耗尽或出现故障时,备用簇头节点能够实时升成簇头节点以维持簇稳定工作,从而减少网络重建的次数,提後高网络稳定性,仿真实验表明,双簇头分簇算法比单簇头分簇算法有更好的稳定性和公平性.     

Thermal Reactivity of Double-Base Rocket Propellants

Thermal decomposition studies on double-base propellants have been carried out in air and vacuum using differential scanning calorimetric, thermogravimetric and mass spectrometric techniques. Low temperature (90 °C–170 °C) decomposition seems to involve diffusion controlled process, the mechanism in air and vacuum being different. High temperature (170 °–205 °C) decomposition involves bond breakage.     

A Rough Set Based Model in Water Quality Analysis

Due to pollution caused by the expansion of human activities and economic development, water quality has gradually deteriorated in many areas of the world. Therefore, analysis of water quality becomes one of the most essential issues of modern civilization. Integrated interdisciplinary modeling techniques, providing reliable, efficient, and accurate representation of the complex phenomenon of water quality, have gained attention in recent years. With the ability to deal with both numeric and nominal information, and express knowledge in a rule-based form, the Rough Set Theory (RST) has been successfully employed in many fields. However, the application of RST has not been widely investigated in water quality analysis. The reducts generated by RST models become very time-consuming as the size of the problem increases. Using multinomial logistics regression (MLR) techniques to provide reducts of RST models, this investigation develops a hybrid Multinomial Logistic Regression and Rough Set Theory (MLRRST) model to analyze relations between degrees of water pollution and environmental factors in Taiwan. Empirical results indicate that the MLRRST model could analyze water qualities efficiently and accurately, and yield decision rules for the staff of water quality management. Thus, the proposed model is a promising and helpful scheme in analyzing water quality.     

Microstructural refinement and tensile properties enhancement of Mg-3Al alloy using charcoal additions

Significant grain refinement in Mg-3Al alloy is achieved with the addition of charcoal due to the formation of Al₄C₃ particles, which act as effective nuclei for magnesium grains. Addition of 0.5 wt% charcoal has lead to reduced grain size of Mg-3Al alloy from 500 to 80 μm and no substantial grain refinement is obtained on further addition of charcoal. The results further reveal that the prolonged holding of the melt after the addition of charcoal has not affected the grain refining efficiency of Al₄C₃. Steady increase in tensile properties observed with increasing amount of charcoal addition has been attributed to the grain refinement and the presence of fine Al₄C₃ particles. The strengthening mechanisms due to charcoal addition are discussed in terms of Hall-Petch relation and dispersion strengthening. The predicted values are in good agreement with experimental results.     

作为片断的系统,作为系统的片断——曹敏硕和MASS STUDIES事务所的建筑语汇

<正>我们如何构建高密度建筑的理论?社区的概念能否与这种大都市建筑契合?亦即,当建筑周边土地价格和空间成本十分高昂,以至于在某种程度上可以说每一寸土地都在为资本主义服务的时候,应该如何实现建筑和社区的概念?这些问题当然不甚鲜见。在战后美国、欧洲和日本经济扩张的背景下,路易·康、十人小组、阿     

Preload assessment in patients with an open abdomen

Health care providers and purchasers of health services have an opportunity to improve patient care and potentially save costs through the wise purchase of interactive health communication applications for patients and employees. Purchasing decisions based on evaluation and evidence should drive the design and development of new systems. The cycle of evaluation includes a needs assessment before system development, usability testing during development, and studies of use and outcomes in natural settings. This type of evidence is critical to our understanding of how best to provide health information and decision assistance to patients, employees, and others.     

Effect of the Strength of the Material of a Plate Accelerated by Low-Rate High Explosives

Plate acceleration by a gliding detonation wave is studied experimentally for detonation rates of 950–2000 m/sec. It is found that regular elastic waves occur at the surface of the projectile plate made of a rather strong material, which disappear upon attainment of the upper limit of the detonation rate.