Extension and application of arc segment data structure;
GIS中弧段数据结构的扩展与应用
All arcs are traced rapidly by using the connection information between points.
本文通过分析遥感分类图栅格像元之间的关系,快速自动地提取矢量数据点及其连接信息,进而利用连接信息快速生成弧段,由弧段自动组建多边形并建立完整的拓扑关系。
This paper briefly describes the structure and characteristic of large-scale streaming network,and dissertates how to express the streaming network by complex nodes and complex arcs in detail.
介绍了大型流式网络的构成和特点,详细论述了使用复杂节点和复杂弧段的层次拓扑模型来描述流式网络拓扑关系的方法,并举例说明了使用层次拓扑模型的网络分析方法。
Effect of upstream aerator in ogee section of spillway tunnel on cavitation alleviation of downstream sidewall;
泄洪洞反弧段上游掺气坎对反弧段下游侧墙的减蚀作用
Its main problem in projects is cavitation damage of ogee section, which can be frequently found in the end, downstream baseboard and downstream sidewalls of ogee section.
龙抬头式泄洪洞在中、高水头的水利水电工程中应用十分普遍，其突出的水力学问题是反弧段的空蚀破坏，反弧段空蚀破坏的部位常见于反弧末端、反弧段下游底板和反弧段下游侧墙。
The ogee section of dam spillway of the earth-dock dam is often arranged at dam toe of section which has maximum dam height.
土石坝坝体溢洪道反弧段常布置在最大坝高断面的坝脚处,如果此处属于深厚软基,则必须对其进行处理。
When the common bottom aeration facilities is used, the downstream sidewalls near the anti-arch section still has big-range un-airflow area so that it is easy to cause cavitation damage.
采用常见的底部掺气设施时,反弧段下游附近边墙仍存在较大范围的掺气盲区,从而反弧段下游边墙容易产生空蚀破坏。
Study on air entrainment to alleviate cavitations at the end of anti-arc in spillway tunnel;
对高水头、大单宽流量、低佛氏数、小底坡长明流泄洪洞,在反弧段末端采用常规的掺气坎往往难以取得理想的掺气效果,同时,反弧段下游边墙易出现空蚀破坏。
Summary of study on ogee-section cavitation in longtaitou spillway tunnels;
龙抬头泄洪洞反弧段空化空蚀研究综述
Base on the previous research since 1981,this paper has given a brief introduction and comments on cavitation research of ogee-section in spillway tunnels.
根据国内外大量的工程实例,在前人研究的基础上,系统总结了龙抬头泄洪洞反弧段空化特性和空蚀成因,同时对反弧段的掺气减蚀和反弧段抗蚀体型的现有成果进行了综述,指出关于体型优化和掺气设施研究,数值实验具有花费少、适应能力强、提供的流场资料详细、便利方案选择等优点。
Sectors of it represent corresponding fractions of a wavelength.
它的各个弧段则代表一个波长的相应分数。
Study on Air Entrainment to Alleviate Cavitations for Downstream Sidewalls of Ogee Section in Spillway Tunnel;
龙抬头泄洪洞反弧段下游侧墙掺气减蚀研究
The Study of Boundary Value Problemwith Radicals in an Open Couter;
关于开口弧段上的带根号的Riemann边值问题的探讨
Study on Relative Orbit Determination Method of Satellites Formation with Short-arc
编队卫星短弧段相对轨道确定方法研究
Analysis Methods in Admissible Region of Too Short Arcs in Space-based optical Surveillance
天基光学超短弧段测量的约束域分析方法
Bézier Curve Offset Based on Circular Arc Approximation
基于单位圆弧段逼近的Bézier曲线等距线生成算法
working flank radius
齿廓工作段圆弧半径
This paragraph is enclosed by brackets.
这段落有括弧括起来。
Stage3, early Pleistocene, anticlockwise rotation of Luzon arc and continent-arc collision.
更新世,吕宋弧逆时针转动和弧陆碰撞阶段.
The point of a line segment or curvilinear arc that divides it into two parts of the same length.
中点一条线段或一段弧上的一点，该点将此线段或弧平分为等长的两部分
A radian is the angle subtended by an arc of a circle whose length is just equal to the radius.
一弧度就是长度刚好等于半径的一段圆弧所对的圆心角。
Study on Geometry Optimization of Pole Shoes, Parameter Calculation, and Transient Behavior Simulation of Hydrogenerators with Multi-section Arc Pole Shoes;
多段圆弧极靴水轮发电机极弧优化、参数计算和动态性能研究
Tom turned a short curve, by-and-by, and exclaimed:
后来汤姆进了一段弧形通道，不久就大声叫道：
A Brief Introduction to Workpiece Blanking & Mould Design of Arc Shroud Segmentation Die
简述弧线轮盖分段压型模工件下料及模具设计
The Rational Cubic DP and Generalized Ball Representation of Arc;
圆弧曲线段的有理三次DP及广义Ball表示
Construction Technology of Concrete Panel Sliding Formwork at Gradual Change Arc Section in Some Reservoir
某水库圆弧渐变段混凝土面板滑模施工技术
Characteristic of time-energy distribution at current-zero period on AC TIG welding arc
交流TIG电弧过零时段的时间-能量分布特征
Analysis on the net sediment transportation along arc-shaped coast in the northern bank,Hangzhou bay--a case study of Longquan-Nanzhu harbor segment
杭州湾北岸弧形岸段悬沙净输移分析——以龙泉—南竹港岸段为例