This article discussed the mechanism of removing ammonia nitrogen with the artificial fast filtration system by analyzing the ability of removing ammonia nitrogen related to the biomass , organic matter and cec ( the total cation exchange capacity ) in different filtration layers 摘要文章通过对不同渗滤层中生物量、有机质、 cec （总阳离子交换容量）和对氨氮去除效果间关系的分析来讨沦人工快速渗滤系统去除氨氮的机理。
Our main productions - catalysts resins and ion exchange resins have been optimized for their particular application over the recent years . and have been developed in respect to conversion and selectivity , prolonged lifetime , chemical and physical stability , and exchange capacity 五特点催化剂的催化性能主要由交换容量和孔结构决定，因此，我厂把交换容量和孔结构及机械强度作为主控指标。主要特点表现在以下三个方面：
How to intelligently implemented a flow control mechanism while maximizing the memory utilization and system performance , how to minimize link congestion and prevent buffer overflow and how to maintain packets " orders if they are delivered over multiple paths are the challenging design issues related to designing the ultra - scalable switch architectures 基于benes拓扑的多平面多路径(多级)超大容量交换结构在cisco公司最新推出的crs - 1 ( carrierroutingsystem )系统中得到运用,最高可支持92tbps交换容量。
We installed standalone exchanges in the press center that were equipped with pstnisdn interfaces to provide such services as international switching , toll switching , local hubbing and local switching . the international switching capacity reached 30 , 000 circuit ports , and the toll switching capacity amounted to 126 , 000 circuit ports 我们专门在新闻中心设立了独立的交换机，采用Ｐ Ｓ Ｔ Ｎ Ｉ Ｓ Ｄ Ｎ业务接口，分别提供国际交换、长途交换、本地汇接和本地交换等业务，其中国际交换容量达到３万路端，长途交换达到12
Because of their excellent characteristics , superabsorbents are widely used in health , agriculture and horticulture applications . based on the influencing factors , such as type of structural layer , interlayer charge , interlayer distance , cation exchange capability , surface area and ratio of swelling , kaolinite , sercite and bentonite are choosed as the mineral fillers to synthesize the superabsorbent composite 本文从粘土的结构层型、层电荷、层间距、阳离子交换容量、比表面积和膨胀率等各方面综合比较研究粘土矿物的性质，选择了高岭土、膨润土和绢云母这三种粘土矿物作为无机填料，制备粘土?有机聚合物超吸水性复合材料。
