The spatial characteristics of different types of river networks are analyzed.
分析了不同类型河系的空间特征,对非网状河系以180°假设和锐角假设为基础,改进了自动确定河段流向的定量化决策表,当出现流向冲突时,遵守少数服从多数的原则。
This paper presents a new idea of automatic design of river networks according to its structure, then introduces algorithms about implementing the idea.
结合树状河系自身的结构特点和图论的思想 ,提出了基于图论的河系结构化绘制模型的建立 ,利用图论的思想描述了河系的结构并建立其自动符号化模型 ,阐述了主流、流向自动确定和结构化绘制实现的详细算法 ,并对通用图形数据格式DXF文件记录的河系数据进行了测
Research on Automated Symbolization of River Networks for Digital Mapping;
河系自动符号化的研究与实现
A structural river network data model based on reaches is developed.
针对地图上河流的自动综合,建立了基于河段的河系结构化数据模型,该模型充分考虑了河段与河段、河段与面状水系要素之间的空间关系,以及河系河段的层次关系;建立了一种面向自动综合的河系结构化数据模型,模型包含了大量水系综合所需要的信息。
Calculation of ecological water requirement of river system in hilly area of south China;
南方丘陵地区河流系统生态需水量的计算
Analysis on energy distribution dissipation relation on river system;
河流系统能量分配耗散关系的分析
Based on the existing concept of river health,a new definition of river health on river system was put forward.
通过对现有河流健康定义的分析,提出了一个以河流系统为定义主体的河流健康概念,分析了河流健康评价的内容,并初步建立了河流健康的诊断指标体系。
Influences of urbanization on river network in the coastal areas of East Zhejiang province;
浙东沿海城镇化对河网水系的影响
Based on relief map data and rivers general investigation data for Shenzhen region,the spatiotemporal change of river network system in the region and its cause were studied.
在地形图、河道普查数据、航空相片和遥感影像等多源数据支持下,探讨了深圳市1980-2005年河网水系的时空变化规律及其成因。
there are three thousand million other Milky Ways, or Galaxies, in the universe.
在宇宙中有30亿个其他银河系或天河。
Of or relating to a galaxy, especially the Milky Way.
星系的，银河系的星系的，与星系有关的，尤指银河系
of or relating to a galaxy (especially our galaxy the Milky Way).
属于星系，与星系有关，尤指银河系。
The solar system is one small system in the whole of the Milky Way.
太阳系是银河系中一个小的天体系统。
Phlegethon (3rd River) - A river of fire, one of the five rivers of Hades.
火焰之河?音译弗莱格桑河，系冥界五河之一。
Preliminary Study on the Hydrological Relationship between River and Reparian Wetlands;
河道与河边湿地水文联系的初步研究
Assessment of ecosystem health for typical estuary in Haihe River Basin
海河流域典型河口生态系统健康评价
A STUDY OF THE SEISMIC FACIES OF DEVONIAN DONGHETANG FORMATION IN THE TAHE OILFIELD
塔河油田泥盆系东河塘组地震相研究
The key factors involved in the changes in the Sihe river system are the invasion of the Yellow River and the opening of the Grand Canal.
泗河水系河道变迁的主要因素是黄河夺泗和南北大运河的开发。
Percentages of the Water Quality Grades of the Hai River System
海河水系水质类别比例
Percentage of the Water Quality of the Yellow River System
黄河水系水质类别比例
Percentage of Water Quality Grades in Liao River System
辽河水系水质类别比例
galactic noise
【无】银河(星系射电)噪音
Percentages of the Water Quality Grades of the Huai River System
淮河水系水质类别比例
This work will be done in the Bahe River, Qinghe River, Liangshuihe River, North-ring waterways and Wenyuhe River with a view to improving the water quality of the lower reaches of the city.
继续实施市区坝河、清河、凉水河、北环水系和温榆河的综合整治，全面改善城市下游河流水质。
Based on the morphological characteristics of riverbed of tidal estuaries, a calculation formula for the widening rate of the estuarine regulation line is derived.
根据潮汐河口河床形态关系，推导了河口治导线放宽率的计算式。
Flora、Structure and Biodiversity Characteristics of Riparian Vegetation on Down-reach Floodplain of Yellow River in He nan;
黄河下游河南段河岸带植物区系、群落结构及多样性特征研究
STUDY ON ECOLOGICAL ENVIRONMENT AND WATER SYSTEM RESPONDING TO THE ACTIVETY OF EASTERN KUNLUN FAULT ZONE IN HUANGHE RIVERHEAD AREA
黄河河源生态环境及活动构造的水系响应研究