北京市建筑废弃物资源化利用研究与项目示范

针对北京市建筑废弃物产量大、资源化利用率低的问题,分析了北京市建筑废弃物的来源、产量、组分及处理现状,阐述了建筑废弃物资源化利用途径和资源化利用工艺,介绍了朝阳区建筑废弃物资源化示范项目建设情况,给出了北京市建筑废弃物资源化利用设施建设合理建议。     

Characterisation of FOGs in grease trap waste from the processing of chickens in Thailand

Industrial firms that kill and process chickens generate wastewater that contains fat, oil, and grease (FOG). The FOGs are located in the fatty waste that is collected by floatation in grease traps. Chemical and physical characterisation of FOGs would provide useful information that would help in the development of methods designed to decrease the extent of pollution caused by disposal of the waste and to utilise commercially some of its lipid constituents. Employing these methods would enhance the profitability and competitive potential of these commercial organisations. Samples of grease trap waste from 14 firms in central Thailand have been examined. Due to the very different schemes of waste management employed by these firms, the physical appearance of their fatty wastes showed considerable variation. The chemical and physical properties of the FOGs present in these wastes showed considerable variation also. Large amounts of free fatty acids (10–70% as oleic acid) were detected in most of the 14 wastes and palmitic, cis-9-oleic, cis,cis-9,12-linoleic, stearic, and palmitoleic acids were the predominant species of free and esterified acids. Most of the FOGs were solid at temperatures below 40 °C. Many of them contained traces of heavy metals (Cu and Pb) and some contained traces of the pesticides dimethoate and cypermethrin. The content of these potentially hazardous substances would have to be considered very carefully before discarding the fatty wastes and during the development of methods designed to isolate their potentially profitable lipid constituents.     

试论Java与木材加工业自动化控制和安全生产的关系

Java(Java也是美国加里福尼亚州Sun Microsystems公司的注册商标)正快速成为一种用于加工制造业和系统集成的计算机编程语言。相对于标准C和C^ 计算机语言而言，Java的多功能性和支持众多计算机操作系统和平台的显著特点，使它能在装备有不同计算机平台和控制系统的机械设备上使用提供了最大的方便性。从而提高了木材产品加工过程的安全性。本文就Java软件系统在木材加工和家具加工过程中的应用以及潜在问题进行探讨。     

我国废钢加工装备发展现状与展望

以绿色经济和循环经济的重大需求为背景,系统阐述了废钢加工装备的现状与发展,详细介绍了废钢加工装备的种类与用途,分析并总结了废钢加工装备的应用现状,指出了废钢加工装备以及废钢加工行业的发展方向。     

基于层次分析法的Pedersen人因失误模型研究

科技的发展,使机器设备可靠性有了显著提高,工作环境也得到了改善,但由于人的复杂性,人因失误成为主要的致因因素,如何预防和控制人的失误就成为一个非常重要的课题.运用层次分析法的基本原理,结合Pedersen人因失误模型,构建了导致人因失误的层次分析模型,计算结果显示,人在某种状态下承受负荷的能力大小是影响其失误的主要原因.通过实例,证明了计算结果的可靠性,并提出了减少人因失误的建议.     

基于设备网(DeviceNet)总线技术的矿井瓦斯传感器的设计

介绍瓦斯传感器的国内外研究现状,给出以设备网(DeviceNet)总线构成的瓦斯传感器检测网络结构。简要分析了DeviceNet总线协议特点以及其关键技术,提出具有DeviceNet总线规范的矿井瓦斯传感器的设计及实现方案。硬件电路主要由信号调理电路、数字信号处理器,以及能实现DeviceNet网络通信的接口电路构成,用对象建模的方法构建了矿井瓦斯传感器的对象模型,并用模块化编程技术实现了矿井瓦斯传感器作为一个网络从设备的应用层的软件设计。该传感器作为从设备和带有PCI-CAN网卡的计算机组成主/从连接网络,能对多个矿井瓦斯传感器的数据实现远距离的控制。     

Low‐concentration hydrogen peroxide decontamination for Bacillus spore contamination in buildings

Remediation and recovery efforts after a release of Bacillus anthracis (anthrax) spores may be difficult and costly. In addition, response and recovery technologies may be focused on critical resources, leaving the small business or homeowner without remediation options. This study evaluates the efficacy of relatively low levels of hydrogen peroxide vapor (HPV) delivered from off‐the‐shelf equipment for the inactivation of Bacillus spores within an indoor environment. Decontamination evaluations were conducted in a house using both Bacillus atrophaeus var. globigii (Bg; as surrogates for B. anthracis) inoculated on the carpet and galvanized metal as coupons and Geobacillus stearothermophilus (Gs) as biological indicators on steel. The total decontamination time ranged from 4 to 7 days. Using the longer exposure times, low concentrations of HPV (average levels below 20 parts per million) effectively inactivated Bg and Gs spores on the materials tested. The HPV was generated with commercial humidifiers and household‐strength hydrogen peroxide solutions. The presence of home furnishings did not have a significant impact on HPV efficacy. This simple, inexpensive, and effective decontamination method could have significant utility for remediation following a B. anthracis spore release, such as following a terrorist attack.     

某焦化企业苯加工系统危险分析

介绍了某焦化企业苯加工系统危险分析的步骤、过程,所解决的技术问题及分析结果,可作为其它焦化企业相关系统进行危险分析时参考。     

上海市的灾害隐患及减灾对策

本文从上海市特定的环境角度出发,论述了本市存在的重大灾害隐患,进而提出减轻这些灾害的对策和建议。