Ordinary Toxicity of Chlorine Dioxide and By-products Chlorite and Chlorate in Water

Acute toxicity and accumulated toxicity of chlorine dioxide (ClO2) and by-products chlorite (ClO2-) and chlorate (ClO3-) in water acted on mice are studied by the method of Horn and accumulation coefficient. Subchronic toxicity of the mixture of ClO2 and ClO2-and ClO3- in water acted on rat is studied though feeding test for 90 days, including statistical analysis of variance on weight gaining, food utilization efficiency,index of blood and serum,liver (or kidney) to body weight ratio, and histopathological examination on liver and kidney. The results show that aqueous solution of ClO2, NaClO2 and NaClO3 ( with the concentration of 276.5 mg/L, 200 mg/L and 200 mg/L respectively) and the mixed aqueous solution of ClO2 with the concentration of 553 mg/L are actually non-poisonous , and non-cumulative aqueous solution as well.     

Optimal Dispatching of Large—scale Water Supply System

This paper deals with the use of optimal control techniques in large-scale water distribution networks. According to the network characteristics and actual state of the water supply system in China, the implicit model, which may be solved by utilizing the hierarchical optimization method,is established. In special, based on the analyses of the water supply system containing variable-speed pumps, a software tool has been developed successfully. The application of this model to the city of Shenyang (China) is compared to experiential strategy. The results of this study show that the developed model is a very promising optimization method to control the large-scale water sup-ply systems.     

《广西民族学院学报(哲社版)》引文分析

运用文献计量学方法 ,对 1 995～ 2 0 0 2年度《广西民族学院学报 (哲社版 )》全部论文的引文量、引文类型、引文语种、引文年代等进行统计分析 ,揭示该刊论文著者利用科技文献的规律。     

Holocene lake deposits of Bosten Lake, southern Xinjiang, China

A 9.25-m-long sediment core from Bosten Lake,Xinjiang, provides detailed information about changes in the water budget and biological acticity over the last 8400 cal-endar years. The chronology is constructed from six AMS radiocarbon dates on the terrestrial plant remains. Based onanalyses of TOC, CO3, detrital compounds and biogenic SiO2,lake level fluctuations and periods of remarkably-negative water budget appeared at 8.4-8.2 cal ka, 7.38-7.25 cal ka,5.7-5.5 cal ka, 3.7-3.4 cal ka and 3.3-2.9 cal ka, respec-tively. As they are in-phase with low lake levels at Sumxl Co and Bangong Co in western Tibet Plateau and with paleo-lakes in Inner Mongolia, a climate-induced change to some-what drier and warmer conditions is inferred. A further drop in lake level after 1320 AD of about 200 yr duration may heattributed to a negative water balance prior to the main phase of the Little Ice Age. Deep and stable lake phases of 1500 yr and 1800 yr duration at 7.2-5.7 cal ka and 5.5-3.7cal ka coincide with maximum moisture during the Holocene Megathermai in China. The long term trend towards aridity since about 4.3 cal ka can dearly be recognised. The reduced water budget of Bosten Lake from 640-1200 AD may be attributed to local effects.     

浅谈高校电化教育技术队伍的建设与管理

电化教育是高等院校现代化教学、科研的重要技术手段，由于它在教学活动中以其特有的表现形式，不受时间、空间的限制，对扩大教育规模、缩短教学周期、提高教学质量、降低教育成本有着传统教学无可比拟的作用。近年来，由于科学技术的飞速发展，传统电化教育与网络技术相结合，进一步深化了电化教育的内涵。高新技术在新设备层面上的展示，则对高等院校如何建设一支新型的电化教育技术队伍提出了新的要求。     

鄂尔多斯盆地低渗透油田注水开发的调整与优化

根据鄂尔多斯盆地成功开发的主要特低渗油田——安塞、靖安、华池油田长6、长3油层的储层特征及开发实践,提出了改善特低渗油田注水开发效果的注采参数、注水方式优化及调整技术,从而达到提高单井产量及最终采收率,降低开发投资和生产成本,以提高整体开发效益的目的.     

简论我国社会转型期的政治道德建构的原则

文章在指出我国社会转型期公民政治意识现状的基础上，分析了现阶段政治道德建构的必然性。作者认为，在现阶段的政治道德建构中，应该坚持充分尊重人权，自觉平衡处益和理性地自主自律等原则。     

基于供应链联盟的企业联盟能力分析

分析供应链联盟形成及合作过程特点的基础上,探讨供应链联盟中企业的联盟能力,提出了在供应链管理环境下企业提高联盟能力的关键组成变量.有三类关键变量构成供应链联盟的联盟能力,第一类变量是供应链联盟选择的资格变量,称为联盟伙伴资格要素;第二类变量是使供应商能够赢得成为联盟伙伴机会的变量,称为联盟伙伴赢得要素;第三类变量是促使联盟成功的变量,称为联盟合作要素.     

悬浮填料床生物预处理黄浦江原水中试研究

采用一种新型悬浮填料对黄浦江原水进行生物接触氧化预处理中试研究 .对原水在自然条件下的工艺启动过程进行了分析 ,研究了几种不同工况条件下污染物去除效果 .在水力停留时间 1h、气水体积比 0 .5 6情况下 ,氨氮处理效率可达到 70 %～ 80 % ,CODMn去除效率可达 10 % .实践证明 :采用该悬浮填料的生物接触氧化工艺具有挂膜时间短、氨氮去除效率高、气水体积比小、传质效果好、占地面积小、运行方便以及不积泥等优点     

改变水分子簇的结构及诱发的生物效应研究

概述了水分子簇理论研究的基本状况,以及改变水分子团簇结构的4种方法,包括外加磁场、外加电场、激光辐射以及直接加热法;最后简要介绍了改变水分子团簇结构所诱发的生物效应.