基于有限元的汽车安全带固定点的优化设计

根据国标对汽车座椅安全带固定点的要求,对汽车座椅安全带总成进行了CAD建模和CAE分析。分析结果表明:前排座椅安全带固定点可以满足国标要求,但后排座椅安全带固定点不能满足国标要求。故对后排座椅安全带的固定点进行了优化设计,并对改进后的结构进行了CAE分析。分析结果表明改进后的后排座椅安全带固定点可以满足国标的要求。     

福岛核事故后日本输华食品的安全考虑

日本福岛核事故发生后,从福岛县内及其邻近地区的抽样点上获得的某些食品已经受到放射性物质污染。本文讨论了事故后日本输华食品的安全考虑,介绍了相关标准并提出建议。     

Water industry asset management in England and Wales: successes and challenges

This paper considers the structure, regulation and performance of the water industry in England and Wales in the postprivatisation period from 1989. The paper examines the improvements achieved in drinking water and wastewater effluent quality and in the overall performance. The challenges facing the industry in the areas of water resource planning, energy efficiency and chemical consumption, arising from climate change, are also considered. The paper considers how the industry's current approach and attitude towards research and development (R&D) will influence its ability to meet the latest challenges laid down by the regulators. The paper calls for increased emphasis on, and incentive for, R&D in the water industry to ensure sustainable solutions in both water and sewage treatment.     

Physicochemical and microbiological quality of water from a pilot domestic rainwater harvesting facility in Ireland

Dublin Institute of Technology personnel were commissioned in 2005 by the Department of Environment, Heritage and Local Government in Ireland to assess the feasibility of utilizing harvested rainwater to replace treated mains water, for nonpotable uses. A pilot project was set up. The project involved the design, installation, commissioning and monitoring of rainwater harvesting facilities in a rural housing development. A monitoring programme was carried out to examine the physicochemical and microbiological quality of the harvested rainwater. Harvested rainwater was sampled monthly and tested. Analysis of the harvested rainwater quality showed a consistently high quality of raw water in general compliance with the requirements of the European Communities (Quality of Bathing Water) Regulations for 100% of samples and the European Communities (Drinking Water) Regulations, 2007 for 37% of sampling dates.     

Thermodynamic perfectibility based analysis of energy-efficiency standards for air conditioning products in China

There are presently different types of air conditioning products in China such as room air conditioners, variable speed room air conditioners, unity air conditioners, multi-connected air-condition (heat pump) unit, chilled water air conditioning systems. For these air conditioning products, evaluation indexes have been created, respectively including energy efficiency ratio (EER), coefficient of performance (COP), seasonal energy efficiency ratio (SEER) and integrated part load value (IPLV), and their energy efficiency standards have been established. Based on thermodynamic perfectibility, this paper makes the compatible analysis of the energy efficiency and thermodynamic perfectibility gradient of energy efficiency standards for different air conditioning products. According to testing conditions of evaluation indexes, these air conditioning products are classified into two groups, the standard rating conditions group (EER, COP) and the variable working condition group (SEER, IPLV). The results show the thermodynamic perfectibility of different air conditioning products grade as the same level for energy efficiency standards in each group differ from one another. Besides, the average thermodynamic perfectibility gradient of energy efficiency levels for air conditioning product in the standard rating conditions group is basically the same, and that of variable speed room air conditioners and multi-connected air-condition (heat pump) unit are the highest and lowest, respectively.     

云计算网络机房工程设计思路概述

对重庆市目前最大的云计算基地——重庆两江新区水土国际云基地的太平洋电信云计算机房项目的设计过程进行了分析,概述了大型云计算网络机房工程的设计思路。本文主要包括了云计算机房设计的方法论的基本描述和云计算机房工程设计中各专业和部分子系统重点的注意事项和典型问题的解决技巧。     

GPS和A-GPS技术研讨

对全球定位系统（GPS,Global Positioning System）和全球辅助定位系统（A-GPS,Assisted Global Positioning System）的技术特点、发展趋势、全球测试标准、测试项目和产品方面进行了全面的比较分析,梳理出两种技术的优劣性。通过对GPS和A-GPS技术的优劣的深度分析,给其产品制造商和技术研发部门提供了产品开发的技术支持,也给我国全球定位系统产品的普及化提供了技术保障。同时能够给在具体测试过程中存在的测试项目、测试标准和测试参数不确定性等分歧带来指导性的解决方案。     

浅析楼板重质撞击测试及其相关标准

轻质撞击相对于重质撞击来说在国内以及国际上是最常见的测试方法,国内、国际都已颁布正式测试标准.对于重质撞击测试,目前只有韩国、日本以及中国台湾地区有相应的测试标准.随着人们对住宅声环境的要求越来越高,现在仅用轻质撞击法来评价楼板撞击声的隔声性能已不能满足需求,着重于对重质撞击测试进行浅显的解析.     

移动电话电磁辐射及防护

随着信息技术的发展,移动电话的使用日益普及,移动电话电磁辐射污染问题也越来越受到人们的关注。为了减小移动电话对用户健康的影响,从移动电话电磁辐射的原理出发,结合国家电磁辐射防护标准,对用户提出了防护移动电话电磁辐射的建议,使用户尽量远离移动电话电磁辐射污染,以保护用户的身体健康。     

涂料产品有害物质限量标准浅析

介绍了我国涂料产品安全标准体系,以及涂料安全性国家强制性标准覆盖产品范围,对比了国内外与涂料产品相关的有害物质界定和限制量。指出技术标准是产业发展和市场竞争的核心要素,是推动技术进步与促进自主创新的重要手段。