QUALITY ASSURANCE TECHNIQUES FOR ELECTRONIC DATA ACQUISITION1

ABSTRACT: Electronic instruments are increasingly being used to gather water quality data. Quality assurance protocols are needed which provide adequate documentation of the procedures followed in calibration, collection, and validation of electronically acquired data. The level of precision of many data loggers exceeds the technology which is commonly used to make field measurements. Overcoming this problem involves using laboratory quality equipment in the field or enhanced quality control at the time of instrument servicing. Time control procedures for data loggers are needed to allow direct comparisons of data between instruments. Electronic instruments provide a mechanism to study transient events in great detail, but, without time controls, multiple loggers produce data which contain artifacts due to timing errors. Individual sensors deployed with data loggers are subject to different degrees of drift over time. Certain measurements can be measured with defined precision and accuracy for long periods of time, while other sensors are subject to loss of both precision and accuracy with increasing time of use. Adequate quality assurance requires the levels of precision and accuracy be documented, particularly those which vary with increasing time deployment.     

炭黑/聚苯乙烯复合材料在环境监测方面的应用

制备炭黑/聚苯乙烯(CB/PS)导电气敏复合材料。实验结果表明:复合材料在多种有毒有害有机蒸汽中都有很好的电阻气敏响应性。因此,炭黑/聚苯乙烯导电复合材料在用作气体传感器和电子鼻方面检测空气中的气体污染具有广阔的应用前景。     

浅谈当前电子商务发展的几个问题

电子商务的发展,依赖于把技术优势和传统企业的经营优势相结合,依赖于诚信、道德和法律,只有从企业目前最迫切的需求做起,才能使电子商务得到真正的发展。     

试论报废电子产品最终处置

报废电子产品的最终处理已成为全球性的环境话题。针对我国报废电子产品的最终处置现状，就政啊、生产者及消费者三方面各自所应承担的责任提出一些观点。     

电子安全监控系统(PES)失效与控制

随着电子安全监控系统(PES)的日益广泛应用,其系统自身的安全保护已成为安全科技最前沿的问题之一.本文论述了PES在安全系统中的主要应用领域,分析了PES出现故障和失误的原因主要分为硬件故障、系统失误和管理缺陷三大类,提出了建立PES安全保护系统的技术路线和提高系统可靠性的技术措施.建议我国从标准化的角度深入开展电子安全监控系统的安全性研究.     

现代科技发展与科技期刊编辑

阐述了现代科学技术的发展特征，分析了现代科技对科技期刊的影响以及科技期刊在国家科技创新体系中的地位和作用，指出科技期刊要主动适应科学技术发展趋势，科技期刊编辑要及时了解科技发展，培养和树立信息意识，掌握电子编辑手段与技能，早作“转岗”的培训，只有这样，才能适应时代对编辑工作的要求。     

Evaluating efforts to build sustainable WEEE reverse logistics network design: comparison of regulatory and non-regulatory approaches

Many developing countries such as Turkey are still making an effort on building an infrastructure for waste of electrical and electronic equipment (WEEE) reverse logistic network design (RLND) processes. It is obvious that policies/laws/regulations related to WEEE management provide a sustainable framework for implementation in the RLND. The question is here: Does the implementation of WEEE directives make sense in terms of reducing the total cost of the network in the long term? This study aims to compare regulatory and non-regulatory situations of WEEE RLND in developing countries by formulating two models named as ‘regulatory’ and ‘non-regulatory’. Model 1 is considered as sustainable with economic, environmental and social goals, and the quotas imposed by the environmental directive are taken into consideration as the data of product return amount. In Model 2, only economic goal is considered, and product return amount is forecasted using Artificial Neural Network (ANN). A case study is conducted in a recycling company in order to evaluate performance of the proposed models. This study contributes to the relevant literature by (1) comparing the regulatory and non-regulatory situations RL models explicitly and (2) proposing ANN model to forecast EEE product return or WEEE quantity for non-regulatory situation.     

解毒铬渣安全性研究

用扫描电镜、比表面测定仪、X-射线衍射仪测定了铬渣及解毒铬渣的表面形貌、比表面及物相组成。在模拟环境条件下对解毒铬渣进行了浸出毒性试验,结果表明,解毒铬渣在环境条件下是安全的。      

混合振动试验在汽车电子装备中的应用和要点

环境试验方法国家标准试验Fi：振动 混合模式（GB/T2423.58-2008）已经发布。彩混合振动试验的《道路车辆电气及电子设备的环境条件和试验》国家标准（制订征求意见稿）已经公示。文内介绍了混合模式振动试验在汽车电子装备中的应用,以及混合模式振动试验的过程要素和试验的技术要点。     

道路车辆电气和电子设备样品在振动冲击等动力学试验中的安装

在试验方法和要求标准化后,振动冲击等动力学试验中的安装问题是决定试验是否合理和试验成败的关键要素。道路车辆电子元件和设备型样品的动力学试验是考核样品安装在车辆上使用条件下的适用性。振动试验还叠加了温度和温度变化环境,条件尤为复杂严酷。文内介绍了动力学试验中的安装需要考虑的技术要素,为试验实施中妥善合理地进行样品安装提供支持.