当前大学生思想政治教育状况的现状分析及突出问题

大学生进行思想教育是一项重要的任务。文章对新形势下当代大学生思想品德、学习、心理、人际交往、就业择业等方面现状进行了分析,寻找高校思想政治教育状况的突出问题,并对建立一种新的高校思想政治工作模式和运行机制,提出了切实可行的建议。     

路段环境交通容量优化模型与算法研究

在分析路段环境交通容量主要影响因素的基础上,探讨了路段的污染控制约束条件,以及通行能力约束条件,建立了通行能力和污染控制约束的环境交通容量优化模型,构建了基于增广拉格朗日松弛和辅助问题原则法的模型求解算法.实例结果表明,构建的算法能够快速有效地求解这类环境交通容量优化模型.     

Measuring the environmental efficiency of the global aviation fleet

This research analyses the environmental footprint of the airline industry in an attempt to highlight potential paths for improvement. We develop a directional economic-environmental distance function (DEED) which accounts for the production of both desirable and undesirable output and the potential for constrained increases in input utilization. This research applies the modeling framework to analyze the potential to reduce noise and airborne pollutants emitted by aircraft–engine combinations given the current state of aeronautical technology. The global aircraft–engine market is viewed from the regulatory perspective in order to compare the single environmental and operational efficient frontier to that of the airline carriers, and environmental objectives. The results of DEED are then applied in order to substitute the fleets serving Schipol, Amsterdam and Arlanda, Stockholm airports in June 2010 with the benchmark aircraft. The results highlight the inefficiencies of the current airline fleets and that the IPCC values of externalities are a magnitude of TEN too low to encourage changes in the global fleet hence the need for government intervention.     

基于技术创新理论的维修创新

现今维修创新的困难在于创新理论过于依赖从业者个体悟性,可操作性、可培训性不强,使得常人不易获得成功.针对维修创新的困难,介绍技术创新理论,该理论源自对百万记的专利文献的收集整理、归纳提炼,否定了发明创新是灵感爆发和千百次失败的结果,发现了开发创新的町循规律.并结合维修实例说明如何使得普通维修从业人员能够创新工作.     

中国与哈萨克斯坦铁路国际联运混编列车存在的问题及解决方案

对哈萨克斯坦铁路货车在我国境内运用中存在的问题进行了调查和统计分析,并提出了解决方案。     

钻孔灌注桩质量问题的分析处治

主要结合多年工程中实际出现的桥梁钻孔灌注桩基础质量缺陷问题的形成原因进行分析，同时介绍了几种比较成功的处理防治措施，供同行交流。     

浅谈市政施工管理

该文首先论述了市政工程的特点及其项目管理的主要特征;接着分析了目前施工现场管理中所存在的主要问题;最后有针对性地提出改进施工现场管理工作的若干建议,可供同行借鉴。     

惠州港可持续发展问题研究

惠州港近年来得到快速发展，受到普遍的关注，但很少有人考虑惠州港可持续发展的问题。文中从可持续发展的角度出发，对惠州港的可持续发展问题进行充分阐述，让更多的人关注惠州港可持续发展问题。以便惠州港走上健康发展的轨道。     

一类三阶奇摄动Robin边值问题解的唯一性

利用常微分方程微分不等式理论研究三阶奇摄动Ｒｏｂｉｎ边值问题，＝Ｃ，在适当的条件下，通过上下解的构造得到了其解的唯一性．     

Tangential problem solution for non-elliptical contact areas with the FastSim algorithm

This article deals with the application of the FastSim algorithm to the solution of the tangential contact problem for non-elliptical contact areas. At first, the causes creating problems for the solution of non-hertzian contact areas with this algorithm shall be analyzed. Then, different currently existing methods shall be studied, analyzing their accuracy characteristics and computational cost to determine whether or not they are appropriate to use in dynamic simulations. Finally, a new strategy shall be proposed that, in the opinion of the authors, offers good characteristics of precision and computational cost.