一种DSP+FPGA实时信号处理系统

简要叙述了常用的信号处理系统的类型与处理机结构,介绍了正逐步得到广泛应用的DSP+FPGA处理机结构,在此基础上提出了一种实时信号处理的线性流水阵列,并举例说明了该结构的具体实现,最后分析说明了此结构的优越性。     

通风系统安全可靠性评价研究与实现

矿井通风系统可靠性评价应能及时反映矿井通风系统可靠性的高低，为矿井通风系统的决策者提供有意义的信息，根据信息及时调整矿井通风系统，解决系统中存在的重大安全问题。准确、及时、可靠的数据信息是矿井通风系统安全部门进行技术管理和防灾救灾的重要依据，也是矿井通风系统可靠性评价的重要组成部分。在可靠性分析的基础上提出了矿井通风系统可靠性评价设计思想和软件的实现方法。     

Pesticide Impact Rating Index – A Pesticide Risk Indicator for Water Quality

Pesticide users, natural resource managers, regulators, government agencies and many others are concerned about the off-site impact of pesticides on the environment. Systematic methods of the assessment of potential risk of pesticides to environmental components can serve as valuable tools in decision making and policy formulation. Simple risk indicators have been developed which cover a range of scenarios such as toxicity to organisms, health of farm workers, consumer health, and residues in harvested produce. The authors have developed a software package named Pesticide Impact Rating Index (PIRI) that outputs an improved pesticide risk indicator for water quality. PIRI is a standalone, user-friendly, platform-independent program. It can be used to (i) rank pesticides in terms of their relative pollution potential to groundwater or surface water, and (ii) to compare different land uses in a catchment or at a regional scale in terms of their relative impact on water quality. It is based on pesticides use; the pathway through which the pesticides are released to the water resources (drift, runoff, erosion, leaching) and the value of the water resources threatened. Each component is quantified using pesticide characteristics (including toxicity to organisms at different trophic levels, i.e. fish, daphnia, algae, etc.), environmental and site conditions (e.g. organic carbon content of soil, water input, slope of land, soil loss, recharge rate, depth of water table, etc.). This paper describes two case studies of the application of PIRI in Australia. The comparison of the risk assessment by PIRI on these revealed that PIRI correctly estimated the pollution potential of pesticides in greater than 80% of cases. A GIS version of PIRI is described in a companion paper in this volume. An erratum to this article is available at .     

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.     

一种低功耗高性能数据采集数字处理平台的设计

目的构建一套基于中频信号基带数字信号处理的软件无线电平台。方法通过选择芯片设计硬件电路设计出合适的PCB板。结果主要依据软件无线电平台,提出了一种基于A/D+FPGA+D/A的硬件设计方案,该系统包括了前端的A/D数据采集和后端的D/A模拟数据恢复的详细收发电路原理设计。结论构建了一个从前端数据接收到后端模拟发送的高速基带数字信号处理平台。     

临沧孟定镇天然橡胶加工业对环境的污染及防治措施

根据临沧市孟定镇天然橡胶加工业中存在的选址不合理、臭气及废水污染严重等问题,提出严格执行相关规划及准入条件、加强监管、严格执法及强化宣传教育等一系列措施。     

餐厨垃圾污染防治技术探讨

随着城镇人口的迅速增长,我国物质生活的丰富,但随之而来的餐厨垃圾也日益增多。目前餐厨垃圾技术种类繁多,百花齐放。本文通过对餐厨垃圾处理技术进行了梳理分析,总结出三大主流工艺,为餐厨垃圾的污染防治提供参考。     

广东省电子废物回收处理体系建设对策研究

广东省的电子废物产生量大,亟须建立规范的回收处理处置体系,实现资源的有序回收利用,避免电子废物的不当拆解处理造成环境污染。针对广东省电子废物回收处理的现状和存在问题,提出建设规模化的集中处理体系,产业化的回收利用体系和规范化的统一监管体系的相关对策,以促进电子废物的无害化、减量化和资源化处理处置。     

染料废水处理技术现状与发展

文章介绍了染料废水的物理、化学和生物处理技术,并分析了其去除原理和工艺优缺点,目的在于为染料废水处理工作提供理论基础和现实指导,并提出未来染料废水处理技术的发展走向———高效、经济、适应性强、清洁性的废水处理技术。     

国内外碳管理软件功能比较

低碳经济给企业的发展带来了机遇与挑战。在政策与经济发展形势的驱动下,全球企业正积极寻求低碳转型之路。企业转型要从软硬件两个方面做好准备,包括相关的技术、设备、管理、战略等。做好碳管理是实现低碳转型的关键,而碳管理软件则是一个有力的工具。碳管理软件可以帮助企业实现碳排放信息收集、计算、统计、分析、管理以及实现持续改进,促进企业转型。本文对目前常用碳管理软件的功能进行了比较分析,为相关从业人员合理选择碳管理软件以及开发新的碳管理软件提供参考。