Space grid structure is greatly developed in our country in the past two decades because of its reasonable stress , big coverage area , rich shape and so on , which makes it be more and more welcome and attractive . the structure has a fine prospect 近二十多年来空间网格结构在我国得到了很大的发展,因其受力合理、覆盖面积大和造型丰富而备受欢迎,是一种有广阔发展前景的结构形式。
Taking uplink as an example , both simplified analysis and intensive computer simulations are presented to offer comparisons among frn enhanced systems with the proposed schemes , with a known channel - borrowing based frequency planning scheme and the conventional cellular system without relaying 同时，相对于侧重覆盖面积的频谱分配方案，侧重于频谱效率的频谱分配方案的频谱复用距离较小，从而有更高的频谱利用率，其重点在于解决频谱效率问题。
Firstly , the areas in which people can reach any rail transit station in ten minutes walk is increased ; secondly , the crossing of rail transit lines becomes more convenient for people to change ; and the last , the linear motor suits to the local conditions will be adopted for the transit 指出大江户线增加以轨道交通车站为中心的“ 10分钟步行圈”覆盖面积、城市轨道交通线路的交叉点可以方便地直接换乘、因地制宜选择直线电机车型等做法值得借鉴。
Compared with the efficiency - oriented scheme , the coverage - oriented scheme has higher reuse distances and is developed with emphasis on the coverage , while compared with the coverage - oriented scheme , the efficiency - oriented scheme has smaller reuse distances and is developed with emphasis on the spectral efficiency 相对于侧重频谱效率的频谱分配方案，侧重于覆盖面积的频谱分配方案有较大的频谱复用距离，从而能够提供更好的链路质量，其重点在于解决覆盖问题。
According to the experimental data of droplet size 、 particle spectrum range 、 droplet cone shape 、 flow rate 、 cover area and cover area rate which obtained through changing the pressure of power sprayer and the nozzle diameter in greenhouse ， this paper made comparative analysis on atomizing performance in same pressure and different nozzle type between same nozzle type and different pressure . the conclusion is that : the ejection rate and the droplet cone shape change with the variation of pressure and nozzle diameter ， average particle diameter decreases obviously and particle quantity increases obviously with the increase of pressure and decrease of nozzle diameter . these results will lay experimental foundation for precise spraying 、 low pollution and highly effective operation 本文根据温室内动力喷雾机压力与喷嘴孔径的变化影响雾滴大小、粒谱范围、雾锥形状、流量、覆盖面积及覆盖面积率的试验数据，对相同压力下不同喷嘴型号和相同喷嘴型号时压力不同时的微粒化性能进行对比分析和研究，得到如下结论喷出量与雾锥形状随着压力和喷嘴孔径大小变化而变化；平均粒径随着压力的增加和喷嘴孔径的减小而明显减小；粒数随着压力的增加和喷嘴孔径的减小而明显增多，为精喷量、低污染、高防效的防除作业奠定了实验基础。
The application of the software hardware advanced techniques , such as an algorithm for continuously outputting high - rate gps position data , voice data trucking system ( vdt ) , a new gps ( avl ) system framework , an up - to - date mutual communication method and so on , enlarges the system capacity and the covering area , realizes the voice data transmitting in the present mobile communication channel , meets the need of kinetic positioning . in a word , it enhances the capability of management and decision 系统中gps定位数据的高速率连续输出算法、话音数据集群( vdt ) 、新的gps车辆系统结构和全新的通信交互手段等先进技术的采用，人人提高了系统的容量和覆盖面积，实现了在现有移动通信信道上数话兼容、高动态定位的需求，使科学管理和决策水平得到很大提高。
They are skeletal sand bodies in system of delta and places of most reservoir distribution . the diagenetic processes that govern reservoir properties include the extent of compaction , cementation and dissolution of grains . we recognize that at the early diagenesis phase , mechanical and chemical compaction is very strong , which reduced the original porosity 河口砂坝多位于分流河道或次一级分流河道河口部位，向湖盆中心呈放射状分布，因而河口砂坝砂体多构成朵状砂体，覆盖面积大、连片好，砂体厚度大，是本区已知油藏主要分布区。
This thesis deals with some problems in listening and speaking teaching and the author tries to provide the teachers with a set of feasible tactics to help them to carry out the aims of chinese teaching and enhance students " ability of listening and speaking . this thesis has been established on the basis of the theory on contemporary chinese teaching in listening and speaking , referring to the chinese teaching syllabus and the requirement about chinese text books published by renmin publishing house . the materials and data come from the two questionnaires and the standard tests on the students " listening and speaking ability 本文以甘肃省庆阳地区中学语文听说教学现状调查与测试为切入点，参照教育目标分类学逻辑分类方法，以有关听说教学理论为依据，参照2000年人民教育出版社初、高中语文教学大纲和现在通用语文教材的有关要求，编制两份调查问卷进行调查，并从听话和说话两个方面进行了覆盖面积较大的听说水平测试，了解到了当地中学语文听说教学的实际状况。
