新型双向挤压模架

此文介绍一种新型液压模架的结构及工作原理。该模架导向精度高,生产节拍16件/分。     

Method of pollution sources assessment in relation to residential site selection

Much investigation supports a high incidence of disease and death rates when people live in ambient polluted air for a long time. Thus, the location of residential sites is important from a public health viewpoint. The method outlined in this paper is useful for determining the location of residential sites based on pollution sources assessment.     

微机上冲裁CAD系统的开发

此文介绍了一套在微机上开发的冲裁CAD系统。它以Foxbase作为数据库管理系统,Trubo C为编程语言,能进行冲裁件图形输入与显示、工艺性分析、优化单排排样和选择板材规格、冲裁件尺寸识别和模具刃口尺寸计算、冲裁力和压力中心计算、以及凹模周界尺寸计算等。本系统主界面为下拉式菜单界面,全中文提示,人机界面友好,具有较好的可扩充性和容错性。     

Study of prediction for groundwater contamination in wastewater land treatment system

This paper uses a prediction model of groundwater pollution based on the experiments in the laboratory and in field .The model, which was tested and calibrated by the field observated data ,satisfactorily simulated the field conditions in land treatment system of wastewater . Particularly , the model can provide the reliable pollution prediction of heavy metals , organisms and nitrogen . The model was used to predict the groundwater pollution caused by the land treatment system in the region of North China . The calibration of the model showed that correlation coefficients between the tested and predictive data of Cr6+. As3+, organism and NH4+ could reach 0.990, which proved that the model possessed the realistic instructive significance for design and use of wastewater land treatment systems .     

Sensitized effect of β-cyclodextrin on the fluorescence in the determination of carbaryl

Based on the significant enhancement of fluorescence intensity of carbaryl in inclusion complex, a spetrofluorimetdc method with high sensitivity was developed for the determination of carbaryl in aqueous solution. Under the optimum conditions, the complex had excitation and emission maxima at 278 nm and 332 nm, respectively. The linear range of the method was 7.0 ng/ml-1500 ng/ml with a detection limit of 1.2 ng/ml. The proposed method was successfully used to determine quantitativelv of carbarvl in cottonseeds.     

地理变异系数法和Fisher最优分割法在环境空气监测优化布点中的应用

在环境空气监测点位优化中,为反映优化后点位的整体代表性,需要在允许的测定误差内以最少的测点反映区域内较长时期的整体污染水平、污染分布状况和污染趋势.本文以博山城区为例,利用地理变异系数法和Fisher最优分割法对所布设点位进行数理统计.该方法使用简便,分级自然,避免了诸多人为因素的影响,同时,优选结果具有较强的整体代表性.     

碱性物质中和法在处理煤矿废水中的应用

凡是有地下煤矿开采的地区,都伴之有地下水排放.在面临全球性淡水缺乏的形势下,煤矿排放废水却作为污染源,日夜注入河床,致使环境保护部门为之大伤脑筋,而且各煤矿也为煤矿排放废水的治理,付出了很大的经济代价.因此如何解决煤矿排放废水达标排放的问题,使其能作为矿产资源和水资源得到再利用,解决即将到来的水荒危机就成为了本文讨论的重点.     

为防震减灾事业做好科普宣传--南京地震科学馆的建设与发展

从1989年江苏省第一届科普宣传周起,南京基准地震台都被列为宣传周期间重点对外开放单位.于是,南京地震台克服重重困难,筹建了地震科学馆.十多年来在江苏省地震局和有关单位的大力支持下,由最初腾出地震台的会议室和几间办公室发展到有530平方米的展室和多功能厅,展出内容也得到丰富.同时,地震科学馆在防震减灾宣传中取得了一定的社会效益.     

医疗废物非焚烧处理技术应用及发展趋势探讨

本文结合美国、欧洲等发达国家和地区在医疗废物非焚烧处置技术方面的具体做法，在对国内外主要的医疗废物非焚烧处理技术进行介绍和分析的基础上，结合国外非焚烧处理技术的应用背景及中国实施危险废物和医疗废物处置设施建设规划，对非焚烧处理技术在中国的应用从技术及管理角度提出了相应的建议。     

环境风险评价中若干问题探讨

社会经济的高速发展,也诱发了新的环境风险可能性的发生,特别是近年来的多种环境风险灾害事故的发生已引起了各国和国际组织的普遍关注。环境风险评价与环境风险管理已成为保护生态环境、维护公众健康的重要内容和制定决策的重要依据。文章结合目前环境风险评价的发展,探讨有关两大类环境风险评价(突发性与非突发性)以及环境风险评价与安全评价的区别,环境风险评价评估标准以及环境风险评价与城市环境管理的一些问题。