Scheduling decision styles on leisure and social activities

This paper investigates scheduling decisions associated with different types of leisure and social activities. Correlations among decisions and self-selection biases are explicitly investigated by using a sample selection model with a bivariate probit selection rule. A dataset collected in the first wave of a recent activity-travel scheduling panel survey carried out in Valencia (Spain) was used for empirical investigation. Significant differences are revealed in the empirical models for leisure and social activities in planning decisions, including different effects of temporal, companionship and demographic factors. The findings of the empirical model have important implications to travel behavior and activity-travel scheduling model developments. These results confirm the existence of different mechanisms underlying the activity-travel decision processes when leisure and social activities are of concerns. Results provide significant insights into enhancing the performances of an activity scheduling model by capturing accurate activity-travel scheduling tradeoffs in flexible activity types e.g. leisure and social activities.     

计算机辅助零件编码软件（DTN.CAC）的研究

本文在研制计算机辅助零件编码软件(DTN.CAC)的实践基础上,阐明了软件的设计思想,论述了软件的研制方法及程序结构.该软件具有良好的适用性、可靠性和可扩性,编码效率高,出错率低,精度代码的生成具有特色,并已经过生产使用验证.软件采用汉字 dBASEⅢ数据库语言,适用于 IBM-PC 及其兼容机.     

基于正交试验的双氧水处理废胶粉改性沥青工艺参数研究

针对废胶粉改性沥青储存稳定性较差、黏度大、对施工温度要求高等缺点,采用双氧水对废胶粉表面进行氧化改性,以双氧水用量、处理温度、处理时间及胶粉目数为因素各自选取4个水平进行正交试验。采用软化点、5℃延度、25℃针入度、离析试验、弹性恢复试验和180℃布氏旋转黏度作为考核指标,以极差分析与方差分析作为分析手段,系统研究了胶粉的表面氧化对废胶粉改性沥青性能的影响规律,并优化工艺参数。研究结果表明,双氧水处理废胶粉改性沥青的最优工艺参数组合为:双氧水用量70mL,处理时间4h,处理温度80℃,废胶粉目数40目。     

真空预压加固软基抽真空过程中钻孔取样技术

通过现场试验，提出了在抽真空过程中钻孔取样技术，该技术可保证钻孔取样时膜下真空度基本不变。为真空预压法处理软土地基的深入研究，特别是在加固过程中土工参数变化和固结规律研究提供一种新的试验手段。     

高性能聚氨酯防水涂料——“湿维佳”

概述防水材料的发展及现状,介绍一种高性能聚氨酯防水涂料———“湿维佳”,该产品的优势、特性、测试结果以及产品应用和施工工艺。     

CMAC BASED NONLINEAR PROCESS CONTROL SYSTEMS,PART Ⅱ:CONTROLLER DESIGN

，ＰＡＲＴ Ⅱ：ＣＯＮＴＲＯＬＬＥＲ ＤＥＳＩＧＮTX＠段培永＠李成东＠邵惠鹤ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｒｅｃｅｎｔｙｅａｒｓ，ＮｅｕｒａｌＮｅｔｗｏｒｋｓ（ＮＮｓ）ｈａｖｅｆｏｕｎｄｇｒｏｗｉｎｇｓｕｃｃｅｓｓｉｎｄｉｖｅｒｓｅｉｎｉｎｄｕｓｔｒｉａｌｃ?..     

虎门大桥监控管理软件系统

简述虎门大桥监控管理软件系统的组成以及可变情报板计算机、可变标志计算机、彩色图形计算机、交通通讯计算机和通讯服务器的输入、输出内容,与某些功能的流程框图。最后介绍该软件系统的三大技术创新特点：首创高速公路交通地理的图形处理技术、首创ＷｉｎｄｏｗｓＮＴ与ＳＱＬＳｅｒｖｅｒ数据库在交通控制中的应用技术及创新交通控制设备间的通信技术。     

Investigating the predictive performance of computational process activity-based transportation models

The aim of this paper is to achieve a better understanding of computational process activity-based models, by identifying factors that influence the predictive performance of A Learning-based Transportation Oriented Simulation System model. Therefore, the work activity process model, which includes six decision steps, is investigated. The manner of execution in the process model contains two features, activation dependency and attribute interdependence. Activation dependency branches the execution of the simulation while attribute interdependence involves the inclusion of the decision outcome of a decision step as an attribute to subsequent decision steps. The model is experimented with by running the simulation in four settings. The performance of the models is assessed at three validation levels: the classifier or decision step level, the activity pattern sequence level and the origin–destination matrix level. The results of the validation analysis reveal more understanding of the model. Benchmarks and factors affecting the predictive performance of computational activity-based models are identified.     

论汽车整车开发过程中的项目管理

文章基于汽车行业的特点和现状,结合工作实践分析整车开发流程的阶段、里程碑、重要交付物等关键信息,并基于项目管理知识领域提出相应的管理办法,从而帮助汽车公司在整车开发过程中实现有效管理。     

疏浚工程淤泥质土质岸坡开挖方案优化

以天津临港经济区T7、T8、T9区补吹填工程为例，对岸坡特点和施工区土层结构进行分析，通过对传统施工工艺进行优化，使施工船舶能够高效地进行岸坡开挖施工。对施工过程进行阐述，为复杂地质条件下超长水下岸坡开挖工程提供解决方案。总结施工经验，进一步优化绞吸式挖泥船施工工艺。