凸曲线 meaning in English
convex curve
crest curve
summit curve
Examples
- Here , we will give an independent proof of the existence for inequality ( 2 . 1 . 3 ) , and by the way , give an estimate on the width of the bi - enclosing annulus of closed convex curves in the plane
3 )给出独立的存在性证明，并且还对平面闭凸曲线的bi - enclosing环的宽度给出了一个估计。 - 2 % 22 % and 29 % respectively less than using other three knives at cutting speed of 500mm / min when the moisture contents of rootstalks was 48 . 2 % . the cutting forces were tested at four different parts of rootstalk that were the middle part along a radius , the tip part along a radius , the middle part along axis and the stalk part along a radius , and the force at the middle along a radius is the largest and increase 32 % 45 % 111 % , respectively more than at the other three parts . the force increase 37 % to cut the rootstalks from the areas one crop a year more than that from two crops a year
试验结果表明，根茬含水率愈高，剪切力愈小，根茬含水率与剪切力近似为二次曲线关系；刀片剪切速度愈快，剪切力愈小；凸曲线、斜线、凹曲线和直线四种不同的刀刃曲线对整株根茬剪切力依此由小到大，凸曲线和斜线剪切时有一定程度的滑切作用，所以剪切力相比较小，当根茬含水率为48 . 2 ，剪切速度500mm min时，与其他三种曲线相比凸曲线型刀刃的剪切力依次分别减少了7 . 2 、 22和29 ；对根茬中部、梢部和根部的剪切力，在相同试验条件下，径向中部最大，比梢部，轴向根部和根部茎秆所需剪切力分别增加32 、 45和111 ；当含水率为48 . 2 ，刀片的剪切速度为500mm min时，一年一熟玉米根茬比一年两熟的玉米根茬剪切力增大37 。 - To save the resources and shorten the development cycle , these research methods were adopted , such as , using ug software to build the model , analyzing the removed snow ’ s track directly on the model , using adams to simulate the structure of avoiding obstacles , and using relative experience data to calculate the whole
( 5 )对原避障机构进行仿真分析,改进不合理之处,使铲刃避障轨迹为上凸曲线。 ( 6 )通过除雪车作业计算,分析前雪铲作业时整车的侧向稳定性、牵引特性及功率匹配特性,提出改进方案。 - This report is composed of two main parts , one concerns some geometric inequalities about curves and an application of the minkowski ' s support function , the other deals with the perimeter - preserving flow of closed convex curves in the plane and an application of the curve shortening flow on surfaces
本文主要由两个部分组成，第一部分涉及曲线的一些不等式以及minkowski支撑函数的一个应用；第二部分讨论欧氏平面上闭凸曲线的保长度流和曲面上曲线缩短流的一个应用。 - Secondly , in this part , we will introduce the notation of average geodesic curvature for curves in the hyperbolic plane , and investigate the relationship between the embeddedness of the curve and its average geodesic curvature . finally , we will employ the minkowski ' s support function to construct a new kind of non - circular smooth constant breadth curves in order to attack some open problems on the constant width curves ( for example , whether there is a non - circular polynomial curve of constant width , etc . ) in the second part , we will first follow the ideas of gage - hamilton [ 28 ] , gage [ 26 ] and the author ' s dissertation [ 47 ] to present a perimeter - preserving closed convex curve flow in the plane , which is from physical phenomena
其次，对双曲平面上的曲线引入平均测地曲率的概念，并讨论双曲平面上凸曲线的嵌入性与它的平均测地曲率之间的关系，其目的是为了将双曲平面上曲线的性质与欧氏平面中曲线的性质作一些对比；最后，我们利用minkowski支撑函数构造了一类新的非圆的光滑常宽曲线，其目的是想回答有关常宽曲线的一些未解决问题(如是否存在非圆的多项式常宽曲线