弧段

Three intersection functions,such as adjacent node set,node-arc angle set and connected node set,were presented,and based on the shortest path method proposed by Dijkstra,a road guide sign model was built by using the intersection functions.

结合路网的拓扑结构，定义了用于确定指路标志的状态函数集，给出了3个描述路网拓扑特征的交叉口函数：邻近结点集、结点-弧段夹角集和连通结点集，基于Dijkstra最短路径的思想，运用交叉口函数建立了城镇指路标志的标识模型：以待标识城镇为中心，在城镇的影响区域内，通过向外搜索交叉口邻近结点集来确定指路标志的设置，并使每个结点上标识的路径都是最优的。

The result shows that the strong earthquakes in China Western Continent is related to the strong earthquakes in Andaman arcuate zone.

结果表明两区强震活动存在较强的相关性，近期安达曼弧段强震活跃态势将会对大陆西部未来 1年及稍长时段的强震活动产生深远的影响。

A traffic network includes a node set and an arc set,which can be derived by the line. Before the line is converted to network, data processing must be done.

交通网络可抽象为节点集和弧段集的集合，其图形基础是线，再通过线派生出网络相应的节点集和弧段集。

To understand the hyperbolic motion of the probe and give necessary orbit information not only the discrete positions to both ground-base or satellite autonomy device, we studied the variation of hyperbolic orbit and gave the variation equations like that of elliptic orbit.

这段轨道相比其它段虽然很短，但却是实现最终探测目标的关键弧段。为了更好地了解探测器的在这一关键弧段的运行状态，给地面测控系统或是星上自主设备提供必要的轨道信息，而不仅仅是探测器在一些孤立点上的位置和速度，有必要对双曲线轨道及其变化特征进行研究，给出类似于椭圆轨道及其变化的一些基本规律。

Passing analysing The link of the three-arc-sect isometric type surface, built the three-arc-sect isometric type surface equation, found the location of isometric type surface with the finite element analysis method and calculated the link intensity of the three-arc-sect isometric type surface.

文中对型面联接中的三弧段等距型面联接进行力学分析，首先建立三弧段等距型面方程，应用有限元法确定等距型面接触点的位置，对三弧段等距型面联接中的应力分布及大小进行分析计算。

Ogee spillway tunnel s are widely used in middle or high head water conservancy and hydropower projects.

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。

Its main problem in projects is cavitation damage of ogee section, which can be frequently found in the end, downstream baseboard and downstream sidewall s 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 quarter ellipse curve is used at upstream face of weir crest and intake side of surface hole, the downstream face of weir is linked with 1:0.7 slope section, then linked with ogee spillway, its radius is equal to 30m.

表孔堰顶上游坝面及进口侧采用1/4椭圆曲线，堰面下游接1：0.7的斜坡段，再接R=30m反弧段，并采用长隔墩布置方案。

Moreover we extend this method to the unbounded Stokes problem, the boundary of which is an open straight or an open arc segment.

另外，本文推导了开区域(特别是边界是直线段或开弧段情况下无限域)上的Stokes 方程的Dirichlet 外问题的边界积分表达式以及等价的变分方程。

Aerators are widely used in flood discharge tunnel s and spillways to prevent the cavitation damage of the structures.

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。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。