蜂巢恒温调控机理检测装置的研究

为了研究蜂巢恒温调控机理,设计了一种能够在蜂群处于原生态环境下进行温湿度测量的装置。该系统根据巢脾摆放特点,按蜂巢空间对称原则放置温湿度传感器。上位计算机控制下位单片机何时采集,单片机采集温湿度传感器信号经处理后输出并通过无线发送模块发送数据,无线接收模块接收数据并传送给计算机,计算机实时显示温湿度和相应时间并保存。实际应用表明:系统使用方便,数据传输可靠,所测数据符合蜜蜂生物学特点,为后续进一步研究蜂巢恒温调控机理提供数据支持。     

The impacts of mass transit on land development in China: The case of Beijing

Land development impacts of mass transit have long been studied in the developed economies. Yet relatively little is known by the outside world about the Chinese experience due to China's rather short history in the development of modern mass transit and land/property market. This paper attempts to fill the gap by presenting evidence from China, with a detailed case study of Beijing. Selecting three newly built suburban transit lines in Beijing, the study examined land development context and estimated hedonic housing price models to measure the proximity premiums associated with these three lines. The empirical evidence in Beijing, one of the first tier mass transit cities in China, shows that investments in mass transit can have significant and positive impacts on land development. Properties with transit proximity enjoy sizable price or value premiums. The study also confirms the international experience: transit impacts on land development are unlikely to occur automatically; they rely greatly on supportive regional and site conditions. Integrated planning and design for mass transit and land development are critical to expand and maximize the return of transit investments.     

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宏观基本图（MFD）存在于具有交通运行同质性的城市路网中,它可以用于路网的服务水平评估、区域控制和宏观交通建模.不同道路运行条件对MFD的形状存在不同的影响,进行MFD影响因素分析是应用MFD理论研究城市交通运行规律的前提.本文以广州市海珠区为研究区域,运用Paramics交通仿真软件对海珠区的路网进行建模,通过采取不同交通管控措施,分析MFD图形的影响因素.结果表明,MFD不仅是路网本身的性质,也是控制策略效果好坏的直接体现.同时,需求的剧烈变化、公交专用道的设置、车道禁行都会不同程度的影响路网的MFD.另外,制定交通控制策略时要优先考虑路网中的关键路段.     

Public responses to policies designed to internalise environmental and social externalities from road transport in New Zealand

Based on a public survey of registered voters, we explore four options for internalising the social and environmental costs of road transport. The options were presented together with generalised factual information about their benefits and costs. Respondents are highly supportive of fuel use efficiency standards and exhaust gas quality standards, with lesser support for proposed initiatives of road user charges and speed reduction. Demographic analysis of responses enables identification of those who might favour or oppose particular options. In this case women are identified as being strongly supportive of the speed reduction option.     

基于物联网技术的公路工程建设安全智能监管系统构建

物联网是继计算机、互联网与移动通信网之后的第三次信息产业浪潮,对促进科技发展、经济增长和社会进步具有重大意义。针对我国公路工程建设安全管理方式落后、安全生产监督管理效率不高、监管方法偏重单一和运动式等缺陷,搭建了一种基于物联网技术的公路工程建设安全智能监管系统。系统通过对建设过程中的安全状况进行量化、打分及统计,达到实时监测、预警和处理安全隐患的目的,克服了以往安全问题处理不及时、不科学等问题,有效的提升了我国公路工程建设安全管理现代化、智能化和科学化水平。