For (E) there exists at most one maximal elliptic sector.
本文研究广义Lienard系统解的一些定性性质，证明了（E）至多存在一个最大椭圆扇形，并获得系统（E）的轨线趋于原点及存在同宿轨族的充要条件。
In this note we discuss the conditions of the existance of homoclinic orbits for planar systems,and derive the sufficient conditions that there exists at most one maximal elliptic sector.
本文讨论了平面系统存在同缩轨的条件，给出了平面系统至多存在一个最大椭圆扇形的充分条件，同时得到Ｌｉｅｎａｒｄ系统至多存在一个最大椭圆扇形。
in this paper,we discuss some qualitative behaviour of the solutions of a Lienard equation,obtain some sufficient and necessary or sufficient conditions for the existence of the family of homoclinic,closed orbits,hyperbolic and elliptic sectors,and the boundedness of positive and negative semiorbits,and the intersection with the vertical isocline.
本文讨论Ｌｉｅｎａｒｄ系统解的一些定性性质，得到了存在同宿轨族、闭轨族、双曲扇形和椭圆扇形、正负半轨有界及其与等倾线相交的充要条件或充分条件。
The water curtain nozzle is the water curtain movie necessarynecessary product, ShuiMutou opens the mouth to be possible to move, blowout Shui Mucheng semicircle fanghaped.
水幕喷头是水幕电影必备的配套产品，水幕头开口度可调，喷出的水幕呈半圆扇形。
A half - circle window, often with sash bars arranged like the ribs of a fan.
扇形窗门或窗上有扇骨状放射格条的半圆形窗
We can get a sector.
生：把圆锥的侧面展开，得到一个扇形。
round greenish-white squash having one face flattened with a scalloped edge.
淡白绿色圆形南瓜，一面平，边缘扇贝形状。
Floating stability calculation of cylinder caisson with fan shaped partition wall
扇形箱格之圆形沉箱浮游稳定的计算法
scalloped surface
扇形表面, 扇壳饰
Design of Conical Type Centrifugal Fan for Combine Harvester;
联合收割机圆锥形离心式清选风扇设计研究
Natural Boundary Element Method for Boundary Value Problem in an Exterior Elliptic Infinite Sector Domain
椭圆外无穷扇形区域边值问题的自然边界元法
A machine part or other mechanical device that is shaped like a quarter circle.
扇形体形状似四分之一圆圈的机器零件或其他机械设备
The plane area bounded by such an arc and two perpendicular radii.
四分之一圆，扇形体由九十度弧与两条垂直的半径围成的平面图形
Numerical simulation analysis of sector and circular oil recess temperature field of heavy hydrostatic
重型静压轴承扇形腔和圆形腔温度场数值模拟与分析
A greenish - white, flat, round squash with a scalloped edge.
密生西葫芦一种白绿色的有扇贝状边缘的扁圆形西葫芦
The Spatial Index Methods Based on Minimum Bounding Circle and Minimum Encircling Sector
基于最小边界圆和最小包围扇形的空间索引方法
relating to or resembling a sector.
与扇形有关或类似于扇形。
fanned beam antenna
扇形波束天线扇形波速天线
A fan-shaped anatomical structure.
扇形器官扇形的解剖结构
A cylindrical container or object.
圆柱形容器，圆柱形物体
Centrifugal fan. Center circle can be shown or hidden.
离心风扇。可显示或隐藏中心圆。