Continuum modeling approach to the spatial analysis of air quality and housing location choice

Today, air pollution is a great issue, and the transport sector is an important emission source. In this study, we present an integrated land use, transport, and environment model in which transport-related pollutants are assumed to influence people's housing location choices, and a continuum modeling approach is applied. The pollutants generated by the transport sector are dispersed by the wind and they affect air quality. The air quality changes people's housing choices, which in turn changes their travel behavior. We assume that the road users are continuously distributed over the city, that the road network is relatively dense, and that this network can be approximated as a continuum. The total demand is categorized into several classes, and the modeled region contains several subdistricts. People who live in different subdistricts or who belong to different classes of commuters are assumed to have different perceptions of travel time, air quality, and the housing provision–demand relationship. The finite element method and the Newton–Raphson algorithm are adopted to solve this problem, and a numerical valuation is given to illustrate the effectiveness and efficiency of the proposed model.     

The work of mapping and the mapping of work: prosumer roles in crowdsourced maps

This paper presents an analysis of crowdsourcing work with a particular focus on exploring what forces and characteristics of the collaboration practices and technologies encourage and discourage prosumer work behaviours. Data were gathered through depth interviews with prosumers of a crowdsourced digital nautical map, observational netnographic research of prosumers on angling forums, and interviews and meetings with the map providers. Incorporating research on consumer work and prosumption, three distinct prosumer roles are identified based on how angling prosumers differentially produce and consume the crowdsourced maps. These roles show multiple behaviours along the prosumption continuum, and in so doing extend the continuum by introducing a second dimension – work as private versus public prosumer activity. It concludes by offering suggestions for marketers to engage with prosumers in crowdsourcing contexts.     

PLC在汽车工业上的应用

本文简单介绍了PLC对吉利汽车白车焊装生产线的应用,从而达到品质的提升。     

基于51单片机的六足机器人控制系统设计与制作

提出了基于51单片机控制的六足机器人系统,针对机器人的运动,采用三角步态方式对六足步态进行规划,设计电路和程序,使用单片机控制18路舵机的旋转角度实现行走。通过模型制作和实验,可控制机器人的行走,并且结合传感器实现了自动避障。实验表明51单片机可以对六足机器人进行控制,步态规划与程序设计合理。     

多任务调度实现四足机器人运动控制

基于μC/OS-Ⅱ实时操作系统的多任务调度原理,对四足机器人规划层的任务进行了划分及详细阐述,并进行了优先级的设计,最终实现了四足机器人的运动控制。     

青少年机器人教育的误区

青少年机器人活动,是深受青少年喜欢的科学探究活动。青少年机器人活动在我国刚刚起步,从活动器材到比赛项目,以及青少年机器人科技辅导员教师队伍的建设方面都存在着一些误区与不足。本文研究、分析了我国青少年机器人教育活动的基本情况,指出了其发展过程中的误区与不足,提出了相关对策。     

射频识别技术在喷涂自动化生产线上的应用

介绍了射频识别技术在汽车外饰保险杠喷涂线的应用情况,阐述了使用射频识别技术后的生产计划数据的自动识别,并对其应用效果做出评估。     

2R-1P3R双臂雕刻机器人操作手雅可比矩阵的建立

在异形曲面加工中采用２Ｒ－１Ｐ３Ｒ型双臂机器人结构，建立了该机器人各机械臂的雅可比矩阵，从而实现由各关节运动和力到操作手末端运动和力的传递。