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城市自来水
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  city tap water
     Measuring benzo(a) pyrene of city tap water with high performance liquid chromatography
     液相色谱法测定城市自来水中的苯并(a)芘
短句来源
     The paper discusses the rudiment of pipe network computer of city tap water companies in geography information system and builds a pipe network hydraulic model based on node equation method. Furthermore,the paper finds the solutions to the model by using the Newton iteration method.
     文章论述了地理信息系统中城市自来水公司管网计算的基本原理,建立了一个基于节点方程法的管网水力模型,并用经改进的牛顿迭代法实现了对模型求解。
短句来源
  city water supply
     RESEARCH ON LEVEL-2 DISPATCHING SYSTEM OF CITY WATER SUPPLY
     城市自来水二级调度系统的研制
短句来源
     Looking for the law of city water supply amount and forecasting the water supply amount not only can guide civicism construction and civicism management, but also are related to resident living.
     寻找城市自来水供水量的规律性,预测以后几年的供水量,不仅对于市政建设和市政管理有着重要的指导意义,而且也关系着城市居民的日常生活。
短句来源
     Taking the research on level- 2 computer dispatching system of Hefei Water Supply Company as an example,this paper summarizes the device configuration, system functions and the realization of dispatching software of the dispatching system of city water supply.
     以合肥市自来水公司计算机二级调度系统的研制为实例,总结了城市自来水调度系统的设备配置,系统功能,以及调度软件的实现。
短句来源
  water supply in cities
     “FOUR REMOTES” SYSTEM BY MICROCOMPUTER FOR PRODUCTION MANAGEMENT OF WATER SUPPLY IN CITIES
     城市自来水生产调度微机四遥系统
短句来源
     This paper introduces the computer integrated process monitoring system, which with management and control as a whole organism, and CIPS (Computer Integrated Process System) as its goal, consists of multi level computer system, local area network and radio network, i.e.the "Four Remotes" system by microcomputer for production management of water supply in cities, which realizes the real time monitoring and dynamic control of production management.
     本文介绍了由多级计算机系统和局域网及无线网络构成的以CIPS(Comput-erIntegratedProcessSystem)为目标的管控一体化的计算机集成过程监控系统—城市自来水生产调度微机四遥系统,它实现了生产调度的实时监控和动态管理。
短句来源
  “城市自来水”译为未确定词的双语例句
     Concentrations of PFOS in some city抯 tap water, sea water and the water far away from human activity areas were less than 1ng/L, and the concentration range of PFOS in water polluted easily by life filthy water and industrial wastewater was 1.50~44.6ng/L.
     被调查部分城市自来水、海水和远离人类活动地区的水中PFOS浓度大多数低于1ng/L,容易受到生活污水和工业废水污染的水中PFOS浓度范围为1.50~44.6ng/L.
短句来源
     Contents of perfluorooctane sulfonate (PFOS) in tap water, surface water, groundwater, and seawater in partial areas of China were determined adopting highly effective liquid chromatography /mass spectrograph with selected ion monitoring (LC/MS-SIM, m/z = 499) technique.
     采用高效液相色谱/质谱仪联机选择离子监测(LC/MS-SIM, m/z = 499)方法,测定了我国部分城市自来水、地面水、地下水和海水中的全氟辛磺酸(PFOS)含量.
短句来源
     According to Grey System theory, this paper has forecasted the supplies tap water in cities by GM(1,1).
     根据灰色系统理论,用GM(1 ,1) 模型对城市自来水供水量进行了预测。
短句来源
     The application of PIG technology in cleaning of city drink water pipe
     PIG技术在城市自来水管网清洗中的应用
短句来源
     Results: (1) The analysis results of drinking water conditon of community in Taiyuan city showed: from 2003 to 2005, every water quality index of underground water, surface water, mixing water and tap water was in line with < The sanitary norm of drinking water water quality > (2001) of national Health Ministry, the rate of coincidence was 100%.
     结果:(1)太原市居民生活饮用水状况分析结果表明: 2003-2005年,太原市地下水、地面水、混合水、城市自来水管网末梢水水质各项监测指标均符合国家卫生部《生活饮用水水质卫生规范》(2001),合格率100%。
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  city tap water
Centrate containing approximately 1000 mg/l ammonia nitrogen was diluted with Tucson city tap water to provide treatments of 2.5, 5, 10, 25, 50, and 100% centrate, along with a dilution water control.
      
Durham city tap water in water bottles with stainless steel sipper tubes was provided ad libitum.
      
Tilapia were kept in running Nijmegen city tap water at 25 C and a photoperiod of 16 h light alternating with 8 h darkness.
      
  city water supply
The Neversink Reservoir is part of the New York City water supply system and is located in the Catskill Mountains.
      
A city water supply fed into a rotameter, which controlled the flow rate into the bottom of the column.
      
A part of the city water supply is diverted to that area by extending the existing network without strengthening transmission mains.
      
An additional 264 homes were first connected to the city water supply system.
      
Characterization of inorganic particles in selected reservoirs and tributaries of the New York City water supply.
      
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  water supply in cities
This paper focuses on the different urban governance approaches through which multilateral donors support informal networks and small scale providers to provide water supply in cities of developing countries.
      


Recently, a new standard for cast tubes and their parts has been promulgated and put into practice. However, no working pressure has been specified along with it. In this paper, an attempt is made at explaining the procedure of the establishment of the new standard, and accordingly, a practical method of calculation of the wall thickness of tubes and their grade selection are discussed in detail. The formula for wall thickness T of cast iron tubes and the method of calculation corresponding to tubing conditions...

Recently, a new standard for cast tubes and their parts has been promulgated and put into practice. However, no working pressure has been specified along with it. In this paper, an attempt is made at explaining the procedure of the establishment of the new standard, and accordingly, a practical method of calculation of the wall thickness of tubes and their grade selection are discussed in detail. The formula for wall thickness T of cast iron tubes and the method of calculation corresponding to tubing conditions are also given together with illustrative examples.

铸铁管及铸铁管件新标准已颁布实行,但其中不再列有工作压力,本文旨在对新标准的制订方法作一解释,并按制订标准的思路,拟订出实际计算壁厚和选用管子等级的方法。文中阐述了铸铁管壁厚T公式的推导,并提出按铺管条件来计算壁厚T的方法,给出了计算示例。铸铁管由于造价低廉和耐腐蚀的特点而被广泛用于城市自来水和煤气系统,也用于生活污水处理和消防水源等系统。鉴于其使用的广泛性,1982年在冶金部标准化所的主持下,修订了“YB428-64”标准,使之与国际标准相接近,新标准革除了以工作水压力为设计选用的方法,这就提出了如何正确设计计算和选用不同级别管子的问题。本文拟就这方面作初步探讨。

This paper introduces the test concerning iron removal in the stratum by pumping-recharging circulation after the charging of tap water into a single deep well. While the average iron content in effluent drafted from the well not exceed 0.3mg/L, the withdrawal-recharge ratio may reach 9:1, the dynamic water level in the well is kept stable and operation effect is quite well.

本文介绍了用城市自来水进行回灌的单井抽灌地层除铁试验情况。在井出水平均含铁量不超过0.3mg/L条件下,抽灌比可达9:1,井中动水位稳定,运行效果良好。

A new semi-rarametric forecasting method for ARM A series is proposed in this paper. Without estimating MA parameters of the model,the method can give the forecast directly just based on AR parameters and autocovariances of the series, so that the forecasting problem is solved much more simply. The method is specially suitable to adaptive forecast and slowly time-varying case,Its application in short-term water load forecasting is also presented in the paper.

在关于ARMA序列新息定理的基础上,本文给出了ARMA序列的一种半参数预报方法,该方法避开对ARMA模型中MA参数作估计这一计算复杂的工作,在只须知道AR参数的情况下直接得到序列的预报值,从而使计算量大为简化同时又保证有一定的精度,本文还介绍了半参数预报方法在城市自来水负荷预报中的成功应用。

 
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