【摘 要】
：
The article builds three engineering rural access network models that describe the structure of network elements and their relative engineering parameters for c
【机 构】
：
School of Economics and Management of BeiJing University of Posts and Telecommunications,Guilin Bran
论文部分内容阅读
The article builds three engineering rural access network models that describe the structure of network elements and their relative engineering parameters for cable access、synchronous code division multiple access (SCDMA), and very small aperture terminal (VSAT) access technologies in the rural areas of China. Of the three access technologies, cable access and SCDMA access are the most popular access technologies. Besides, there still exist some remote special areas such as western mountain areas, whose natural environment is so bad that VSAT becomes the unique economical access way. Fully considering rural areas geographical environments impact, the article introduces geographical revised factor (GRF) to the models. By substituting the network data from the operators into the models, the article obtains the integrated networking values and does further researches on different access networks.
其他文献
依据活性亚结构拼接原理,合成了6个新型含有磷酸酯和氨基甲酸酯结构片段的氟虫腈衍生物,其结构经核磁共振氢谱和碳谱、电喷雾质谱(ESI-MS)以及元素分析确证。初步生物活性及
Effect of UV - B radiation on the feeding behaviour of marine zooplankton is important to assessing the health harm of marine ecosystem due to the gradually enh
This study evaluated the correlation between DNA degradation of the splenic lymphocytes and the early time of death, examined the early time of death by compute
Element profiles of some beach rock samples collected from South East Coast of Tamilnadu, India have been determined using single comparator method of INAA. The
The study presented the method for isolating the heterotrophic nitrifiers and the characterization of heterotrophic nitrification. When influent Ammonia nitroge
观察日粮添加苦参碱对断奶仔猪腹泻的影响,揭示其防治断奶仔猪腹泻机理.试验采用了16头早期断奶仔公猪,平均分2组,对照组饲喂基础日粮,苦参碱组饲喂添加苦参碱的日粮,试验期1
Knowledge of the morphological dynamics of a water course is essential for management of reservoir siltation. With an example of sedimentation in a reservoir in
The AtTOM1 gene of Arabidopsis thaliana had been shown to be essential for the efficient multiplication of Tobacco mosaic virus (TMV) in A. thaliana. In this st
The grey system theory and the artificial neural network technology were applied to predict the sewing technical condition. The representative parameters, such
As-cast and heat-treated 400-18 ductile iron(DI)grade was obtained in different foundry conditions,as metallic charge,Mg-treatment alloy and inoculation.It was