一种基于PIV的民机客舱气流组织测试方法的研究

气流组织是民机舒适性设计的主要因素之一。本文提供了一种采用PIV技术测试民机客舱的气流组织的试验方法,并通过试验结果和数值仿真的比较分析证明了其可行性。此试验方法可加强气流组织方面的相关研究,增强该领域的技术储备,为民机客舱气流组织的设计提供必要的技术基础。     

建设美好人居环境下的廉租房建设思考

随着城市化进程的加速,越来越多的流动人口进入大城市务工,但他们的居住条件不容乐观,已成为社会的热点问题。公共住房的建设不仅关系到民生,更是整个社会实现美好人居环境的首要环节。本文通过分析流动人口的住房现状和特点,以及当前廉租房建设现状及问题,进一步说明廉租房建设的迫切性和必要性。     

基于紧缩空间的宜居城市研究

为了研究城市建设中城市规模无序性、盲目化的扩张,近年来建设宜居城市似乎成为每一个城建者的共识,本文通过大量的数据分析,探讨如何建设宜居城市,怎样解决新的城市建设问题,并避免对宜居城市建设的曲解和功利化.而基于紧缩空间为基础的宜居城市建设正是解决这一城市规划难题的办法.     

河北省基本公共卫生服务项目调查研究

为了解河北省"基本公共卫生项目"的进展情况,本文分析和总结项目运行中存在的问题,并提出推进项目规范运行的策略和措施。     

新型酚醛树脂软模板法制备微孔碳

针对微孔碳的制作工艺复杂、成本较高的缺点,采用新型酚醛树脂软模板法试验制备了微孔碳,该方法工艺简单、成本较低,通过改变酚醛树脂的原料配比和搅拌方式来考察上述因素对微孔碳的形貌和孔径的影响。结果表明,当m(苯酚)∶m(甲醛溶液)∶m(H_2O)∶m(Na_2CO_3)为1∶6∶80∶0.010和m(葡萄糖酸)∶m(ZnCl_2)∶m(HCl)∶m(H_2O)为1∶2∶6∶20时,制备的微孔碳球直径在2～5μm,比表面积达670 m~2·g~(-1),平均孔径在0.37 nm。     

提高大学物理教学效果的策略

大学物理是理工专业的必修课,是一个完整的理论体系.针对学生普遍觉得大学物理学习困难的状况,提出建立物理思想,融学于做,选择教学内容,培养自主学习能力,优化考核方式等提高大学物理教学效果的策略.结果表明,这些策略的实施,极大地提高了学生的学习积极性和主动性,教学效果明显好转.     

Comparative Study of Emergency Logistics Path Planning

As natural disasters attract extensive attention worldwide,it is significant for governments and researchers to determine how to deliver emergency supplies after natural disasters.Considering the disaster victims' urgent needs for supplies after the disaster,based on the previous research,the path planning model from the shortest path and the optimal time was created in this paper.As in the actual road the outbreak of emergencies might cause some secondary disasters,including landslides triggered by heavy rain,paralysis of traffic together with a large crowd caused by earthquakes,the theory and method of the complex network to explore the topological structure characteristics of the whole network in the affected area were applied.Then,combining with the actual situation of the road network,the reliability analysis of the points,edges as well as topological structures were presented and a mathematical model based on reliability was proposed.Finally,two kinds of emergency logistics path planning models were compared and analyzed by some examples.The results showed that the relationship between time optimality and reliability was relevant.Emergency logistics path planning should not only consider the optimal transportation time of emergency logistics,but also pay attention to the reliability of transportation from a global perspective.     

虎尾大桥5#墩基坑锚索加固施工技术研究

预应力锚索技术作为一种新型加固技术,具有技术先进、经济合理、安全适用等优点,因此,在我国工程建设中得到广泛应用。本文以虎伟大桥5#桥墩为例,分别介绍了锚索框架试验孔的施工、锚索框架防护坡体的开挖及锚索技术在桥墩基坑加固过程中的施工工艺,对同类工程提供了良好的经验。