Work and home location: Possible role of social networks

This research explores to what extent people’s work locations are similar to that of those who live around them. Using the Longitudinal Employer-Household Dynamics data set and the 2000 decennial census, we investigate the home and work locations of different census block residents in the Twin Cities (Minneapolis-St. Paul) metropolitan area. Our aim is to investigate if people who share a residence neighborhood also share work locations to a degree beyond what would be explained by distanhe observed patterns is the role neighborhood level and work place social networks play in locating jobs and residences respectively.     

应用电子技术专业"2+1工学结合"模式的研究和实践

本文通过对应用电子技术专业的研究、探索和实践,总结出“2＋1工学结合”的高职教育模式。此模式对三年制的高等职业教育分为二个教学阶段。第一个阶段是学生在校进行必要的理论学习和专业技能训练,第二个阶段是到企业进行一年的顶岗实习。有“三个观念”要改变：一是教师的传统教学思想和教学方法要改变;二是传统的培养目标和教学计划要改变;三是学生理想的就业观念要改变。     

综合评价在公路项目前期工作中的应用

目前在公路建设项目前期工作中，经济评价结论决定了项目的可行性。随着高速公路建设步伐的加快，由于项目造价高而交通量预测值低且车辆收费标准增长缓慢，经济评价特别是财务评价效果越来越差，部分项目经济评价无法通过。综合评价是在经济评价的基础上。综合项目在经济、政治、国防、社会效益等多领域因素的分析，得到项目的综合评价结论，为项目的可行性提供依据。     

论新时期铁路局技术监督工作

阐述新时期铁路局技术监督工作在标准化管理、计量管理和质量管理3个方面的关键点，提出新时期铁路局技术监督工作的实施建议。     

铁通江西分公司办公自动化系统的设计与实现

为了提高办公效率、加强省公司和市分公司的信息沟通，综合现代的数据库技术和计算机控制技术，采用B／S（浏览器／服务器）的模式，提供了一整套的办公自动化管理系统解决方案。文章简要介绍了该系统的功能和结构，并对其中的部分关键技术问题进行了详细的阐述。     

基于混合遗传算法的船台装配优化研究

为了在船台装配作业中最小化船台周期、降低作业成本、均衡资源负荷,分析了船台装配作业的特点并对其进行了建模,设计了一种适于解决本优化问题的混合遗传算法,开发了对应的软件。将最小化船台周期的优化目标体现在解码的过程中,保证了解码的唯一性;同时将降低成本的优化目标体现在评价和选择的过程中。经本方法得出的船台装配日程计划为实际生产提供了很好的指导。最后,通过一个算例,验证了本方法的可行性和有效性。     

谈中型航标船的技术改造

文中以中标船“海标052”轮为例．谈实现老旧航标船现代化技术改造,以期解决中型航标船存在设备老化、作业模式陈旧、助航效能低及船员劳动强度大等问题。     

Contrastive Analysis of Working Face Stability in Cases of Climbing Excavation and Horizontal Excavation北大核心CSCD

Restricted by site and construction period of ancillary structure of metro project, climbing excavation is often adopted. In order to determine tunnel face’s stability, the stabilities of working face in the cases of climbing ex- cavation and horizontal excavation were analyzed by theoretical analysis and numerical simulation. With upperbound limit analysis, the affected scope and positions of failure zone were compared; the position of equivalent strain zone and the law of horizontal displacement changes were studied by simulation analysis. The results show that the scope of failure zone caused by climbing excavation was slightly larger than that by horizontal excavation and the po- sition of affected zone is slightly lower than that by horizontal excavation; the horizontal displacement caused by climbing excavation within a scope of 0-1/3 height of tunnel face is slightly larger than that by horizontal excavation while it is slightly smaller beyond the scope of 0-1/3 height of tunnel face; the maximum horizontal displacements in the cases of climbing and horizontal excavation both occur at the place where is 1/3 height of work face and the de- formation of work face in the case of climbing excavation is not larger than that of horizontal excavation; the work face stabilities are mostly the same in the cases of climbing and horizontal excavation without regard to advanced support, and the work face stability is to be guaranteed with proper advanced support. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

Modeling commuting mode choice jointly with work start time and work duration

This paper presents a joint trivariate discrete-continuous-continuous model for commuters’ mode choice, work start time and work duration. The model is designed to capture correlations among random components influencing these decisions. For empirical investigation, the model is estimated using a data set collected in the Greater Toronto Area (GTA) in 2001. Considering the fact that work duration involves medium- to long-term decision making compared to short-term activity scheduling decisions, work duration is considered endogenous to work start time decisions. The empirical model reveals many behavioral details of commuters’ mode choice, work start time and duration decisions. The primary objective of the model is to predict workers’ work schedules according to mode choice, which is considered a skeletal activity schedule in activity-based travel demand models. However, the empirical model reveals many behavioral details of workers’ mode choices and work scheduling. Independent application of the model for travel demand management policy evaluations is also promising, as it provides better value in terms of travel time estimates.     

基于网络环境的考勤管理系统的设计与实现

随着局域网在企事业单位的普及,提出利用网络特有的新技术手段,采用目前流行的ASP网络开发技术实现了基于网络环境的考勤管理.详细介绍系统的设计与实现,就系统结构、功能以及特点进行了详细阐述.应用证明系统充分发挥了网络资源的优势,既经济又方便,提高了单位的管理效率和水平.