关于化学实验绿色化的研究与探索

本文从绿色实验思维养成、改进实验内容、采用微型化实验、引进先进仪器和技术、废弃物处理等几方面,论述了改进绿色化学实验的可行性和迫切性,符合环境可持续发展的时代要求。     

用于先进PCB制造技术的堆叠封装技术研究

球栅阵列封装器件和芯片尺寸封装器件的研究和应用使得印刷电路板的组装密度和性能得到了提高,达到了二维组装密度的极限。但如同之前的通孔直插器件和表面贴装器件一样,它们在电学、机械、热性能、尺寸、质量和可靠性方面达到最大值。目前,3D多芯片堆叠组装正在成为未来先进印刷电路板制造工艺的发展方向。按照结构特征可把其分为芯片堆叠封装和封装堆叠封装,重点对其中成本最低、性能最先进的元器件堆叠封装技术进行了研究。     

一堂精彩的“理实一体化”课堂教学

文章以校企合作单位上海欧姆龙公司培训教师曾庆球到学校上课为例,介绍了高职院校课程改革中,理实一体化课程的授课过程和授课方式,说明了高职院校课程改革的重要性及其目的。图文并茂,说服力强。     

Optimal Size in the Waste Collection Sector

The purpose of this study is to analyze the cost structure of a sample of Italian wastecollection firms in order to assess economies of scale and density and, therefore, definethe optimal size of the firms. A total and a variable translog cost function were estimated using panel data for a sample of 30 firms operating at the provincial level over the period 1991–1995.The empirical evidence suggests that franchised monopoly, rather than side-by-sidecompetition, is the most efficient form of production organization in the waste collection industry. Further, the majority of firms are not operating at optimal scale.     

论死刑的存废与中国死刑制度的现实选择

死刑制度的存废与死刑制度的取向一直是中国理论与立法界争论的热点问题之一,中国现行的死刑制度的存在有其一定的合理性,但在限制和废除死刑的国际趋势下,中国在刑事立法上是否也应该全面废除死刑制度。本文以此为视角,对这一问题进行粗浅的探讨。     

纸塑包装延长高压灭菌包的临床应用

目的:纸塑包装延长高压灭菌包的临床应用。方法:双层棉包布常规包装高压灭菌按要求存放7d,霉季5d,而纸塑包装可保存6个月。结果:纸塑包装大大延长无菌包的无菌时间。包装安全经济,可靠,并可预防院内感染。     

电子废弃物循环利用技术现状

电子废弃物是一种宝贵的二次资源,但是如果处理不当将会造成资源浪费和严重的环境污染.介绍了电子废弃物的特点,以及国内外电子废弃物的处理技术现状.     

基于费用流的废纸动态回收网络优化设计

通过建立基于费用流的废纸动态回收网络模型并求解,解决废纸在运输网络中流动的路径问题,避免了经典运输问题无法直接体现转运和路径选择的问题,最后通过一个模拟算例验证了模型的优越性。     

Web content mining for comparing corporate and third‐party online reporting: a case study on solid waste management

This study investigates the coverage of solid waste management on 1142 websites maintained by companies, news media and non‐governmental organizations to validate an automated approach to content and language analysis. First, a frequency analysis of waste management terms sheds light on the breadth and depth of their environmental discourses, revealing that corporate and media attention to waste management is small compared with that of non‐governmental organizations. Second, an investigation of their attitudes toward waste management suggests that companies avoid negative information in environmental communication, unlike news media or non‐governmental organizations. Ultimately, an automated tool for ontology building is employed to gain insights into companies' shared understanding of waste management. The ontology obtained indicates that companies conceptualize waste management as a business process rather than framing it from an ecological perspective, which is in line with findings from previous research. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment.     

轮胎使用年限及我国轮胎报废量预测研究

给出了轮胎平均使用年限和轮胎报废量计算方法。依据统计数据计算,我国汽车和摩托车外胎使用年限平均为1.9年和2.7年。测算废汽车和摩托车外胎重量为10 kg和1 kg左右。2011~2015年全国及各省市废轮胎产生量逐年增加,废汽车外胎占废轮胎总量的90%以上,是废轮胎回收的重点。