To deal with the hierarchy coding data structure widely existed in application,this paper proposes a new conception of hierarchy distance and proves its mathematical properties.
针对广泛存在的层次编码型数据类型,提出了层次距离的新概念,证明了相关的数学性质,并在此基础上提出并实现了新的基于层次距离计算的聚类算法HDCA(Hierarchy Distance Computing based clustering Algo-rithm)。
Bundle conductor minimum ground clearance of 1 000 kV AC UHV transmission lines;
1000kV级交流特高压输电线路导线最小对地距离研究
Research about ground clearance and cross and span of UHV DC transmission lines is an important topic of UHV DC transmission technique.
为确定云广±800kV线路对地及交叉跨越距离,首先根据国内外资料确定有影响的环境标准,包括静电场、合成场强、离子流密度、无线电干扰及可听噪声等,在公众能到达的地方,按美国电科院EPRI Report EL2257推荐的方法进行静电场、合成场强、离子流密度计算,根据计算结果确定其导线最小对地距离;再根据系统确定的操作过电压倍数及电气绝缘强度(空气间隙)来确定在人不宜到达地方的交叉跨越距离;部分区域综合考虑地面合成场强及电气绝缘强度的影响确定相关距离。
This article presents calculation methods of electric field intensity near the line with four circuits on one tower of 500 kV and 500 kV/220 kV mixed voltage and compares the result that of the traditional 500 kV single circuit and double circuits on one tower,and tries to find out the best lay form of wires between phases and the least distance to the ground,and analyzes th.
给出了500 kV同塔四回送电线路、500 kV/220 kV混压同塔四回送电线路附近电场强度的计算方法,与传统500 kV单回、双回线路进行比较,得出现行规程下导线最佳相序布置形式及最小对地距离。
Research on Clearance to Ground and other Crossed Facilities of DC Transmission Lines at ±800 kV Voltage Level
±800kV级直流输电线路对地距离及交叉跨越研究
Numerical Simulation for Effects of Metro Tunnel on Adjacent Buried Pipe
地铁隧道对近距离埋地管道影响的数值模拟
A Dissymmetrical Social Distance--A Study of Natives and Outlanders Social Network and Social Distance in Suchou;
不对称的社会距离——对苏州市本地人与外地人的关系网络和社会距离的初步研究
question closely. or question a witness that has already been questioned by the opposing side.
近距离地问或问一个已经被对方问过的证人。
The First Analysis of Relief Factors of Debris Flow By the Method of Least Square Distances;
用最小平方距离法对泥石流地貌要素之初探
Zero-sequence mutual inductance on the ground distance elements impact analysis
零序互感对线路接地距离保护的影响分析
It is almost 40 times farther away than the Earth is.
它距太阳的距离几乎比地球距太阳的距离远40倍。
short spread of detectors
小距离排列地震检波仪
a spacecraft's orbital distance from the earth
航天器的远地轨道距离
Ground indicates an area or distance on the earth's surface
指地面上的区域或距离
The distant star is far distant from the earth.
这颗星距离地球很远。
We are some way off, eg our destination.
我们有一段距离（如距目的地）。
"apart: at a distance in place, position, or time."
相隔,相距: 在地点,方位或时间上成距离
The difference in longitude between two positions as a result of movement to the east.
东距两地间经度差，指向东移动的距离
The horizontally projected distance from the point of the star facet to the edge of the table, relative to the distance between the table edge and the girdle edge.
横排推算距离点的天星小面的边缘上表相对地之间的距离表边缘和肩带边缘.
the highest region of the ionosphere (from 90 to 600 miles up) that contains the highest concentration of free electrons and is most useful for long-range radio transmission.
电离层的最高层，距地球表面至英里，有高度密集的自由电子，对远距离无线电传输非常有用。
range hand wheel
距离手轮, 距离盘
What is the distance across?
到对面有多少距离？
