爆破溃副坝的流量过程线计算方法及其应用

在考虑特定水库的入流、库容特性及阻力、泄洪特性的基础上 ,按照水量平衡与输沙平衡原理 ,提出副坝逐渐溃决的流量过程线的 1种新的计算方法 ,该方法被用于某水库安全问题的研究 ,结果表明该方法是切实可行的。     

半导体工业废水污染特征因子初探

指出了集成电路和印制电路板是半导体工业的主要组成部分,而在生产过程中会大量使用氢氟酸,使得虽经过处理后的生产废水中氟离子浓度仍较高,达到7 mg/L左右;通过将半导体企业排放废水与生活污水、地下水及地表水中氟离子浓度进行比较,提出了以氟离子浓度作为半导体工业废水的污染特征因子,并结合不同雨污混接类型污染特征因子,依据物料和水量守恒得出不同混接类型的近似混接水量比例计算公式,以期为后续的雨污混接溯源和雨污改造工程提供借鉴。     

Passage of sediment through flumes and over weirs

This paper reports on laboratory research on the sediment passagecapability through long-throated flumes and broad-crested weirs withwhich the Froude number in the approach channel does not exceed 0.6over a distance of about 20 times the water depth upstream of thestructure. Design rules are given for any combination of flume or weirin combination with any channel.     

油罐阻油切水阀启动过程的研究

本文对油罐本安型阻油切水阀研制过程中的几个技术关键之一￣二次启动进行了较详细的力学分析，研究了阻油切水阀的启动过程，分析了启动过程中液体在静止和流动两种情况下对浮球工作的影响，提出了启动机构方案。     

The quality of service provided by the irrigation department to the users associations, Tunuyan System, Mendoza, Argentina

The quality of service provided by the provincial Irrigation Department (DGI) to the Water Users Associations (UA), and subsequently by the UA's to the related water users, is based on the provincial water law. The intended volume of water being delivered per considered period further depends on the water availability and on the (crop irrigation) water requirements. The Service Level (SL) compares the intended water supply with the water supply that would be required to supply the entire irrigable area with sufficient water. As soon as the intended water delivery pattern is set, the measured actual delivery can be assessed against the intention. Several performance indicators are used in this context. Based on the assessment of the Water Delivery Performance Ratio and the Overall Consumed Ratio recommendations are made on changes which can be made to improve water use and reduce problems of waterlogging.     

中隔墩对WES堰流量系数影响研究

为了定量分析中隔墩对WES堰泄流能力的影响,采用试验方法研究了墩头为半圆形的中隔墩在不同水头下的流量系数,并与无中隔墩情况进行了对比分析,并采用数值模拟方法,分析了设置中隔墩后流量系数减小的原因,研究结果表明:中隔墩对泄流能力的影响可用侧收缩系数反映,堰前有无引流明渠对中隔墩侧收缩系数影响不大;有无边墩对中隔墩侧收缩系...     

DBD耦合针铁矿降解苯模拟废气

采用双介质阻挡放电(DBD)研究针铁矿煅烧温度、负载量、输入能量、停留时间、初始浓度及湿度对等离子体催化降解苯的影响,分析降解产物及碳氧化物选择性,并对降解机理进行探究。研究表明,在该等离子体发生装置下,最佳条件为煅烧温度350℃、负载量4.0%、停留时间1.408 s、相对湿度70%左右。在输入能量为1 242 J/L、初始浓度为400 mg/m~3时,相对单独DBD,针铁矿的加入将苯的降解率从62.00%提升至73.36%,臭氧浓度从132.8 mg/m~3降至36.8 mg/m~3,碳氧化物选择性从67.13%提升至82.14%,出口NO_2浓度从7.95 mg/m~3降低至1.70 mg/m~3。利用FT-IR、GC-MS分析降解产物,发现最终产物主要为CO_2、CO、O_3、微量NO_2及少量硝基苯酚、苯醌等。