UDMH颗粒物中絮状团聚物的裂解质谱及红外光谱分析

在不同试验务件下，采用裂解质谱及红外光谱分析方法对偏二甲肼(UDMH)颗粒物中絮状团聚物的成分进行了研究。结果表明，絮状团聚物的主要成分为聚四氟乙烯，另舍有少量UDMH及其氧化产物和细沙状颗粒物。细沙状颗粒物中可能舍有SiO2或有机硅氧烷化合物。     

Self-similar solutions to stellar winds with cosmic rays

A two-fluid model is used to study the time evolution of stellar winds including the dynamical effect of cosmic rays. Neglecting the diffusion of cosmic rays, we seek self-similar solutions to spherically symmetric winds with a termination shock. The velocity upstream of the shock is taken to be zero. Physical solutions are those that can connect the shock to the star with the velocity approaching zero at the star. Two parameters govern the behaviour of the solutions, namely, the ratio of the upstream sound speed to the shock speed (in an inertial frame) and the gravitation potential of the central star. In some parameter regimes, no physical solution is possible.     

中小型企业建立生产计划优化线性规划模型的通用模式

本文提出了建立企业生产计划优化线性规划模型中约束方程的通用方法。简化了建模过程。并经多个企业的实际应用证明了其普遍适用性。为中小型企业建立生产计划优化线性规划模型提供了一个通用模式。     

关于“用好的作风选人，选作风好的人”的逻辑梳理

“用好的作风选人，选作风好的人”必须确定相关的概念，必须进行科学的判断，必须进行正确的推理。本文试图从逻辑角度对这一选人用人原则进行梳理。     

A sample collector for robotic sample return missions III: Impact survivability studies

Laboratory impact tests have been performed on experimental versions of a proposed robotic sample collector for extraterrestrial samples. The collector consists of a retractable aluminum ring containing an impregnable silicone compound that is pressed into the surface of the body to be sampled. As part of a comprehensive program to evaluate this idea, we have performed tests to determine if the samples embedded in the collector medium can survive the impact forces experienced during direct reentry, such as that of the recent Genesis sample return mission. For the present study, samples of sand, rock, glass, and chalk were subjected to decelerations of 1440–2880 g using drop tests. We found that even the most fragile samples, chosen to be representative of a wide range of the types of materials found on the surface of asteroids that have currently been studied, can withstand impacts of the intensity experienced by a sample return capsule during direct reentry.     

我国商业银行拆入资金业务内部控制体系研究

资金拆入是指商业银行因资金周转需要而在金融机构之间借入资金的行为，是商业银行的一项常规性业务，拆入资金业务内部控制是我国商业银行内部控制体系中的一个重要组成部分。拆入资金业务内部控制体系可以为我国商业银行加强拆入资金业务管理、提高拆入资金业务的运作效率提供可靠的理论借鉴。我国商业银行拆入资金业务内部控制体系的设计必须密切联系我国商业银行拆入资金业务的运作实践。因子分析可以为理论模型提供现实性检验，从而展现我国商业银行拆入资金业务内部控制的现实性微观机理。     

对等性权利义务下的我国农业补贴法律制度研究

农业、农村经济的发展以及农民收入的增长是关系国家和社会利益的一件大事。在当前我国社会经济发展前提下，根据权利与义务的对等性理念，分析农业的特性，得出农业具有先义务性，存在权利与义务非对等性的现象，以此揭示农业补贴得以存在的本质内涵，即弥补这种先义务性，寻求权利与义务的数量等值。最后得出必须通过建立完善的农业补贴法律制度，达到权利与义务的对等，保证正当权利的实现，使其获得正当利益，最终使社会正义得以体现。     

Morphology and Frictional Characteristics Under Electrical Currents of Al203/Cu Composites Prepared by Internal Oxidation

Two AhO3/Cu composites containing 0.24 wt.% A1203 and 0.60 wt.% A1203 separately are prepared by internal oxidation.Effectsof sliding speed and pressure on the fi-ictional characteristics of the composites and copper against brass are investigated and compared.The changes in morphology of the sliding surface and subsurface are examined with scanning electron microscope (SEM) and energy dispersive X-ray spectrum (EDS).The results show that the wear resistance of the AI203/Cu composites is superior to that of copperunder the same conditions.Under a given electrical current,the wear rate of AI203/Cu composites decreases as the AleO3-content increases.However,the wear rates of the Al203/Cu composites and copper increase as the sliding speed and pressure increase under drysliding condition.The main wear mechanisms for AleO3/Cu composites are of abrasion and adhesion;for copper,it is adhesion,although wear by oxidation and electrical erosion can also be observed as the speed and pressure rise.     

正确评价改革开放三十年需要注意的几个问题

要正确评价改革开放三十年，需要注意几个重大问题：高度评价改革开放30年不等于贬低甚至否定前29年；建立社会主义市场经济体制不等于否定计划经济体制的意义；提出中国特色社会主义理论体系，不等于否定毛泽东思想的重要意义；提出科学发展观不等于否定“以经济建设为中心”。     

乡镇财政风险的外部因素分析及对策

乡镇财政风险影响着基层政权的正常运转与稳定，是制约地方经济发展，关系社会稳定的重大问题。近几年，随着我国农村税费改革的推进，乡镇财政潜伏的风险和隐患也日益增多。文章仅就造成乡镇财政风险的外部因素进行了分析，并提出了规范政府行为、完善财税管理体制、提高财政资源使用效率等对策建议。