塑料模标准件、通用件计算机辅助工艺的设计与研究

论述了塑料模具标准件、通用件制造工艺数据库的开发过程。利用C++编程实现对数据库的检索、管理及用户界面设计,利用SQLServer建立工艺数据库,运用API编程技术完成工序图生成和编辑,采用ADO技术对数据库进行访问,以及系统的功能。     

基于MapX组件的江苏省海域管理信息系统开发

为了实现海域使用的规范化管理,引入了地理信息系统技术,在可视化开发环境VisualC 下,开发了江苏省海域管理信息系统。本文重点介绍了MapX组件技术,及基于MapX组件的江苏省海域管理信息系统的开发和应用。     

Formation control of bromate and trihalomethanes during ozonation of bromide-containing water with chemical addition: Hydrogen peroxide or ammonia?

To ensure the safety of drinking water, ozone (O₃) has been extensively applied in drinking water treatment plants to further remove natural organic matter (NOM). However, the surface water and groundwater near the coastal areas often contain high concentrations of bromide ion (Br^?). Considering the risk of bromate (BrO₃^?) formation in ozonation of the sand-filtered water, the inhibitory efficiencies of hydrogen peroxide (H₂O₂) and ammonia (NH₃) on BrO₃^? formation during ozonation process were compared. The addition of H₂O₂ effectively inhibited BrO₃^? formation at an initial Br^? concentration amended to 350 µg/L. The inhibition efficiencies reached 59.6 and 100% when the mass ratio of H₂O₂/O₃ was 0.25 and > 0.5, respectively. The UV₂₅₄ and total organic carbon (TOC) also decreased after adding H₂O₂, while the formation potential of trihalomethanes (THMsFP) increased especially in subsequent chlorination process at a low dose of H₂O₂. To control the formation of both BrO₃^? and THMs, a relatively large dose of O₃ and a high ratio of H₂O₂/O₃were generally needed. NH₃ addition inhibited BrO₃^? formation when the background ammonia nitrogen (NH₃N) concentration was low. There was no significant correlation between BrO₃^? inhibition efficiency and NH₃ dose, and a small amount of NH₃N (0.2 mg/L) could obviously inhibit BrO₃^? formation. The oxidation of NOM seemed unaffected by NH₃ addition, and the structure of NOM reflected by synchronous fluorescence (SF) scanning remained almost unchanged before and after adding NH₃. Considering the formation of BrO₃^? and THMs, the optimal dose of NH₃ was suggested to be 0.5 mg/L.     

谷氨酸生产废水污染治理的综合分析

通过对河南省味源生物发酵工程有限公司高浓度有机废水处理工程的综合分析,结果表明所采用的废水处理工艺处理效果较好,具有明显的经济效益和环境效益.     

采用"预处理+水解酸化+SBR"法处理制药废水

采用“预处理 水解酸化 SBR”工艺处理制药厂废水，处理量为6000m^3／d，CODcr、BOD5、SS、S^-2去除率分别为97．2％、99．3％、98％和99．9％，出厂废水均达到国家二级排放标准。     

有关森林公园环境容量预测的探讨

提出了预测森林公园环境容量的临界准则，进而就环境容量的预测方法、指标等结合实例进行了探讨。     

用灰色组合模型预测环保投资

针对环保投资变化的非平稳性，采用灰以ＧＭ（１，１）模型分析环保投资的趋势项并与历史环保投资比较得一系列残差，然后应用人工神经网络模型进行了正以提高精度。     

生物接触氧化法处理屠宰废水开工调试

结合工程实例 ,介绍采用二级接触氧化工艺处理屠宰废水 ,该处理系统开工调试中污泥培养驯化、系统稳定运行改善出水水质 ,使出水水质达到北京市《水污染排放标准》中的第二级标准 (新改扩 )。     

气候对河南省小麦产量的影响及其变化研究

河南省位于亚热带与温带的气候过渡带 ,小麦产量对气候变化非常敏感 ,气候对小麦产量影响的南北过渡性很明显。文中用正交多项式的方法分离小麦产量 ;用积分回归的方法分析气候对小麦产量的影响。在此基础上 ,首先根据降水量、温度和日照时数对小麦产量影响的区域分布 ,分别把河南省分为4个降水量影响区、4个温度影响区、5个日照影响区 ;然后 ,采用滑动积分回归的方法 ,分别分析了亚热带和温带3个影响因子对小麦产量影响的变化 ;最后 ,讨论了未来气候变化的可能影响。     

Rate constants for the reaction of hydroxyl radicals with HFC-134a

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