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major elements
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    Some major elements that affecting the treating process,such as system pressure flow,pH value of water,concentration of fluorine,and ions strength etc,are studied.
    结果表明采用反渗透技术处理水有降低氟离子的作用。 影响反渗透去除氟离子的主要因素包括 :系统压力、流量、原水的p H值、水中氟离子浓度以及水体本身的离子强度。
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    Based on the six major elements of lightning-protection system and lightning theory,this paper presents a new method of lightning protection design combining pulsar lightning rod and lightning band with the steel in wall in order to make cage lightning protecting system. It analyzes the advantages of this system,introduces the principle of pulsar lightning rod and the calculation of protecting range,and points out the grounded problem in designing the lightning protecting system.
    从防雷系统的六大要素及闪电理论,利用国际先进的Pulsar避雷针与避雷带相结合,并与墙内钢筋组成笼式避雷系统的防雷设计新做法,分析此种防雷系统的优点及好处,同时介绍了Pulsar避雷针的工作原理和保护范围的计算,并提出设计防雷系统应注意的接地问题。
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    This paper,starting with analysis of five major elements of the social problems,present the concept of integration planning.
    本文即针对风景名胜区居民社会问题,从社会问题的5个主体入手对其进行探讨,提出整合规划的概念。
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    Jinbi park was one of the priority greening projects of Kunming city in 2003.The design highlighted plants as major elements for arrangement while integrating with local cultures.
    金碧公园是2003年昆明市重点绿化工程之一,设计以植物作为主要构成元素,融汇地域文化。
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  major elements
Organic Carbon versus Major Elements Relationship in Rocks of the Bazhenov Formation, Western Siberia
      
These components chiefly determine the spectrum of major elements in the Bazhenov Formation.
      
Distribution of rare earth, trace, and major elements was studied in sandy rocks and early diagenetic formations (glauconites and phosphorites).
      
The major elements of the evolution of carbon isotope signature could be retained since the sedimentation stage.
      
The coefficients of migration in water are evaluated, and the major elements with respect to which surface waters enrich under anthropogenic load are identified.
      
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The effective elements of urban activity location are summarized firstly, which are classfied into six major elements: social, economic, cultural, policy, historical, and traditional urban layout, etc. Two typical models of urban activity location are reviewed.Some critical limits of these models in application are pointed out. The paper is concerned with modelling technique of urban activity location in a new opinion, based on the analysis of the real process of urban activity location. Some new models...

The effective elements of urban activity location are summarized firstly, which are classfied into six major elements: social, economic, cultural, policy, historical, and traditional urban layout, etc. Two typical models of urban activity location are reviewed.Some critical limits of these models in application are pointed out. The paper is concerned with modelling technique of urban activity location in a new opinion, based on the analysis of the real process of urban activity location. Some new models of zone population and employment location are presented and applied to the urban transportation planning of two Chinese cities.

分析总结了影响城市活动区位的6个方面因素:历史背景、经济因素、政策政治因素、文化习俗、地理区位、历史和城市规划布局等.对两个经典的城市活动区位模型进行了评述.最后提出了几种适合我国城市特点的活动区位模型:人口系数模型、家庭容量模型和分类土地利用、就业岗位分布模型

The condition and mechanism of removing ammonium ions from water by activated zeolite have been investigated in this paper. Some major elements that affecting the treating process such as treating time and temperature, particle and amount of zeolite are studied.The experimental results show that activated zeolite posse an ability of removing NH + 4 due to the ion exchange and adsorption. [

对改性沸石去除氨氮的条件及机理进行了实验探讨。结果表明 ,沸石经过活化剂处理后具有降低水中氨氮的作用。影响沸石去除氨氮的主要因素包括沸石与含氨氮溶液作用时间、沸石用量、溶液中氨氮浓度、沸石的粒度和溶液的温度等 ,探讨了沸石去除氨氮的机理 ,初步认为主要是由于离子交换作用和吸附作用共同完成的。

The condition and mechanism of removing fluorine ions from water with reverse osmosis is introduced.Some major elements that affecting the treating process,such as system pressure flow,pH value of water,concentration of fluorine,and ions strength etc,are studied.The experiment results show that the ability of removing fluorine by reverse osmosis is related to the bore of reverse osmosis membrane.

对反渗透技术用于去除水中氟离子的条件及机理进行了实验探讨。结果表明采用反渗透技术处理水有降低氟离子的作用。影响反渗透去除氟离子的主要因素包括 :系统压力、流量、原水的p H值、水中氟离子浓度以及水体本身的离子强度。反渗透方法之所以能够去除氟离子是由于反渗透膜孔径小于氟离子直径所致。

 
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