AutoCAD在高速公路施工中的运用探讨

AutoCAD是美国Autodesk公司开发的一种通用微机辅助设计软件包,它在计算机辅助设计领域中得到了广泛的应用。它有着极其强大的内部计算能力,在公路、建筑等工程设计领域运用较为广泛,而在公路桥梁施工中同样有着极其广泛的应用,根据形数结合思想可以运用它进行诸如复杂断面面积计算、根据三维实体计算复杂结构混凝土方量,将它与其他有限元软件结合使用还能充分发挥其快速、准确建立模型的能力。结合晋济高速公路工程实践,简要探讨其在施工中的一些运用。     

The determinants of car ownership in England and Wales from anonymous 2001 census data

Within the transportation research literature, the attempt to understand and predict the level of car ownership is probably one of the most popular areas of study. The primary reason for this is understandable, having access to a vehicle increases an individual’s (or their household’s) travel options, leading to greater mobility. Secondary reasons for this scrutiny include the need to predict future transport investment in road infrastructure and the commercial demand for new vehicles. This paper attempts to predict the level of household car ownership as a function of the characteristics of the household and the individuals that make up the household. The primary data source for this study comes from the 2001 United Kingdom Census and the analysis methods used are from the discipline of data mining. The results of this study are in line with those from previous research but show a potential to predict the higher levels of household car ownership with greater accuracy than other similar studies.     

基于物料清单的汽配企业物流管理优化

针对汽配企业特点，分析现有企业业务流程缺陷，将MRPⅡ与JIT生产管理模式结合起来，提出一种基于物料清单(BOM)的企业物流管理优化方法，并以BOM为枢纽初步构建现代企业物流管理信息系统。通过对具体企业关键业务流程的重组，结合实际订单的处理，阐述加强BOM等基础数据建设对综合、实现先进生产管理模式的重要作用。     

有关社会主义基本经济制度的断想

私营经济是社会主义初级阶段经济中的一个有机组成部分，改革以来是在磕磕碰碰中向前发展的，社会的认识还远跟不上它的发展，坚持公有制的主体地位，如今在相当程度上已成为字上的东西，需要人们从理论到实践认真对待；坚持社会主义基本经济制度的最大难点是处理好公私两类经济的共存共荣关系。     

汽车覆盖件冲压成形数值仿真建模技术

总结阐述了汽车覆盖件冲压成形数值仿真中几何模型和有限元模型的建立方法及注意事项,并对某型轿车发动机罩内板的冲压成形进行了数值仿真。     

A study on the determinants of private car ownership in China: Findings from the panel data

This study examines the determinants of private car ownership in China. The target cities are 32 provincial capital cities and the target period is from 2001 to 2011. In order to capture the individual effects (heterogeneity), the fixed and random effect models are adopted and compared, in which 8 explanatory variables are selected to include economic characteristics, urban characteristics, and transportation characteristics. Moreover, double natural logarithm model is employed to measure the elastic relationship between the private car ownership and regressors. The estimated results show that the fixed effect model performs better than pooled regression model and the random effect model. In addition, there are variations of private car ownership among cities and regions. Finally, the influence of factors responsible for these variations is also presented and discussed in this paper.     

重庆港集装箱码头三维模拟系统设计

以重庆港集装箱码头为实例,利用虚拟现实的方法和技术,混合使用Auto CAD、3D s MAX、Photoshop、Prem iere的技术集成,开发出了集装箱码头的三维可视化仿真系统。介绍了系统的设计方法,系统的构成和工作流程,并对系统中用到的关键技术进行了分析研究,系统虚拟的动画模拟可以为集装箱码头的运营管理提供决策依据。     

Techniques for the inference of mileage rates from MOT data

Abstract

Mathematical and computational techniques are developed for the processing and analysis of annual Ministry of Transport roadworthiness (MOT) test data that the UK Department for Transport has placed in the public domain. First, techniques are given that clean erroneous records and a linking procedure is provided that permits the inference of an individual vehicle's mileage between consecutive tests. Methods are then developed that analyse aggregate mileage totals, as a function of vehicle age, class and geography. The inference of aggregate mileage rates as a function of time is then considered.     

基于顾客价值的汽车销售企业顾客满意度指标体系研究

文章采用顾客价值及层次分析法、专家赋权法、顾客赋权法等多种决策理论方法,结合广西汽车销售市场特点,建立汽车销售企业顾客满意度指标评价体系,对购车顾客满意度进行定性及定量分析,为广西汽车销售企业客观评价顾客满意度及制定更具针对性的产品服务改进策略提供方法依据.     

中国机动车保有量发展趋势分析

针对中国机动车保有量发展趋势的分析及预测问题,从近20年来中国与其他典型国家、地区和城市的人均GDP、机动车保有量及人口密度的数据着手,分析三者之间的关系。结果表明,在未实施机动车保有量控制政策的情况下,人均机动车保有量与人均GDP有较强的正相关关系,与人口密度有一定的负相关关系。指出各个国家在机动化发展过程中各有特点,难以找到精确的定量化预测方法。针对高保有量、中保有量、低保有量三种情况分析中国未来机动车发展趋势并提出相关建议。