用计算机模拟送进角与辗轧角对Accu-Roll轧机变形区的影响

在建立Accu-Roll轧机变形区模型的基础上,开发出计算机模拟软件,可方便地通过变形区纵剖面计算机图象显示分析工艺参数对变形区的影响,从而为合理地选取与优化工艺参数提供依据。     

黄浦江上游工业废水对程序外DNA合成的影响

用SD大鼠原代肝细胞作程序外DNA合成(UDS)试验,检测黄浦江上游水源保护区9家工厂的工业废水,结果表明,在不同时间采集的9家工厂的两批工业废水UDS试验均呈阳性,并且呈剂量—反应关系。这说明9家工厂的工业废水有潜在的致突变作用和致癌作用,对这些工业废水的排放应加以控制。     

脉冲放电烟气脱除尘与除SO_2和NO_X的研究

对脉冲放电烟气除尘与脱除ＳＯ２和ＮＯＸ进行实验研究与分析的结果表明，烟气中的飞灰对ＳＯ２和ＮＯＸ吸附脱除２％～５％，吸附脱除量随着飞灰浓度和烟气含量的增加而增大。在单位体积烟气注入能量为４Ｗｈ／Ｎｍ３和烟气在反应器中停留时间小于３秒，飞灰与水蒸气的协同作用使ＳＯ２和ＮＯＸ脱除率分别达到２３％和３３％。同时，脉冲放电使反应器对飞灰具有良好的协同作用，收集效率为９７％。     

Economic development and its impact on the environment in east coastal zone of China

This paper discusses briefly the elementary characteristics of the east China economic developing zone, and analyses the condition of urban atmospheric pollution, water pollution and ecological damage in this zone at present. It was brought forward that we must pay great attention to the environmental factors, and make the environmental impact assessment and environmental planning in the process of economic development in this zone.     

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

ＲａｔｅｃｏｎｓｔａｎｔｓｆｏｒｔｈｅｒｅａｃｔｉｏｎｏｆｈｙｄｒｏｘｙｌｒａｄｉｃａｌｓｗｉｔｈＨＦＣ－１３４ａＺｈａｎｇＤｅｑｉａｎｇ，ＺｈｏｎｇＪｉｎｘｉａｎＲｅｓｅａｒｃｈＣｅｎｔｅｒｆｏｒＥｃｏＥｎｖｉｒｏｎｍｅｎｔａｌＳｃｉｅｎｃ...     

生物三相流化床处理COD废水工艺条件研究

采用生物三相流化床处理含Cu-COD废水,研究了载体的选择和生物挂膜条件、及废水停留时间、容积负荷、气水比、温度和pH值等工艺条件与COD去除率的关系。结果表明,在控制适宜条件下,对于含Cu2～3mg/l,COD 1500～2500mg/l的染化行业废水,采用生物流化床法处理,排放水Cu可达0.52～0.82mg/l,COD为145～175mg/l,COD去除率可达92％～93％。     

楔横轧变形接触面的螺旋面方程及其应用

建立了楔横轧变形工件与模具接触面的旋转螺旋面方程。利用新方程求解工程问题,其结果比用传统的用圆锥曲面近似求解有明显改善。螺旋面方程的建立为楔横轧工程问题的精确求解创造了条件。对于研究楔横轧理论。提高工艺水平有一定的促进作用。     

Composition analysis of colored dissolved organic matter in Taihu Lake based on three dimension excitation-emission fuorescence matrix and PARAFAC model, and the potential application in water quality monitoring

Taihu Lake is one of the five biggest lakes in China. Surface water samples from 26 sampling sites of Taihu Lake were collected. Furthermore wet chemical analysis (CODCr and BOD5) and measurement of three dimensional excitation-emission matrix (3DEEM) spectra in the laboratory have been conducted. Using parallel factor analysis (PARAFAC) model, three components of colored dissolved organic matter (CDOM) have been identified successfully, based on the analysis of 3DEEM data. The characteristics of the three components also have been described by comparing them to some components of CDOM, identified in earlier researches. Meanwhile, spatial variations of concentration for the three components in Taihu Lake have been analyzed, and the result indicates that the concentration of component 1 depends more on the situation of wastewater pollution and can be used as the indicator of wastewater pollution. The relationship between the concentrations of the three components and results of the wet chemical analysis show that none of the three components can be used as indicators of gross organic matter in water. However, the concentrations of all the three components have obvious linear relationships with the BOD5 value, especially for component 1 (r=0.72878). Finally, the potential applications of the composition analysis based on 3DEEM and PARAFAC model in water quality monitoring have been illuminated.     

新式十字轴径向挤压模具

此文提出了一种新式的十字轴径向挤压模具,此模具动作平稳可靠,生产率高,模具寿命较长,稍加改进后,此模具可适用于各种枝状件径向冷挤压或热锻.     

热变形对高速钢组织的影响

此文研究了W6Mo5Cr4V2高速钢奥氏体化后在750～1150℃等温热压变形对该钢组织的影响.结果表明:该钢在1050℃或更高温度形变才会发生动态再结晶,而950℃或更低温度形变仅发生动态回复;同时热形变诱发析出了NaCl晶型的MC型碳化物;由于形变及碳化物的析出,使得该钢等温形变后直接淬火组织中的位错马氏体量增多.