天津市水源水质特性分析与评价

针对天津市的水源情况,分析评价了1996-2005年10年期间滦河原水和黄河原水的水质变化特点.结果表明,天津市的水源水质普遍存在低温低浊、高藻、微污染的特点.采用Kmeans聚类法对水源水质进行水质分期,把滦河原水划分为3个水质期,黄河原水划分为2个水质期,并对每个水质期的水质特点进行分析和评价,对水厂运行工艺及参数的调整起到一定的指导作用.     

提高高炉清循环冷却水系统浓缩倍数的对策研究

通过对宝钢1号高炉清循环冷却水系统的质能平衡测试和理论分析计算,找出了清循环水系统浓缩倍数偏低的真正原因,并提出了相应的技术措施,所做工作对同类系统有重要的指导意义。     

工程设计质量检查问题解析之给水排水篇

通过施工图质量检查工作，针对给水排水专业出现的问题，进行解析并提出了正确的做法。     

The generalized Riemann problem method for the shallow water equations with bottom topography

This paper extends the generalized Riemann problem method (GRP) to the system of shallow water equations with bottom topography. The main contribution is that the generalized Riemann problem method (J. Comput. Phys. 1984; 55 (1):1–32) is used to evaluate the midpoint values of solutions at each cell interface so that the bottom topography effect is included in numerical fluxes, and at the same step the source term is discretized with an interface method in which only mid‐point values are plugged in. This scheme is well balanced between the flux gradient and bottom topography when incorporating the surface gradient method (SGM) (J. Comput. Phys. 2001; 168 (1):1–25) into data reconstruction step, and it is also suitable for both steady and unsteady flow simulations. We illustrate the accuracy of this scheme by several 1‐D and 2‐D numerical experiments. Copyright © 2005 John Wiley & Sons, Ltd.     

某厂锗煤反射炉收尘系统问题探讨

文章介绍了某厂改造后的锗煤反射炉收尘系统，并对该收尘系统中存在的问题进行了分析和探讨。     

生物脱氮技术处理废水的应用实践

对废水生物脱氮工艺的开工调试进行了分析,通过对污泥的培养、驯化、使活性污泥达到最佳的污水处理状态。对在调试过程中出现的问题提出相应的改进措施,进一步降低了外排水生化指标。     

消防水箱设计中常见错误及改正措施

根据现行消防技术规范的有关规定，结合建筑工程消防监督审核的工作实践，指出了消防水箱设计中常出现的错误并提出了相应的改正措施。     

湛江电厂1号发电机定子冷却水处理方式的改造

简述发电机铜导线腐蚀机理,湛江电厂1号发电机定子冷却处理方式改造前后各自的特点。比较新旧两种方式水质处理效果、安全性、经济性。采用超净化装置后,解决了原来处理方式的所有缺点,水质达到质量标准, 创造良好的经济效益,值得推广改造和借鉴。     

Analysis on the Logarithmic Model of Relationships

The logarithmic model is often used to describe the relationships between factors.It often gives good statistical characteristics.Yet,in the process of modeling of soil and water conservation,we find out that this“good”model cannot guarantee good result.In this paper we make an inquiry into the intrinsic reasons.It is shown that the logarithmic model has the property of enlarging or reducing model errors,and the disadvantages of the logarithmic model are analyzed.