1) tangent point
切点
1.
Aimed at coordinates calculating of tangent point and length amending of suspender cable,a mathematical model of suspender cable and main cable clip in vertical projection was build up.
针对悬索桥主缆索夹处的吊索切点计算及吊索长度修正问题,建立了吊索和主缆索夹在垂直投影面上的数学模型,从椭圆方程出发,推导出了骑跨式吊索在主缆索夹上的切点位置和对应角度的精确解析表达式。
2.
The computational methods of line element conic curve s tangent point decided by any line on projective plane is presented on the basis of this study.
从实际计算的角度出发,使用N矢量表示视平面上的点和直线,并由线素二次曲线的射影定义推导出线素二次曲线的N矢量方程;在此基础上,给出了射影平面上任意一条直线所确定的线素二次曲线切点的N矢量的计算方法。
3.
In the study of the relation of the tangent and the tangent point of conics,this paper will introduce a solution to the problem in seeking the tangent and the tangent point of conics,with mapping the tangent into tangent point or mapping the tangent point into tangent using mapping correspondence.
为了研究二次曲线的切线与其切点的关系 ,借助对射对应将切点映射成切线或将切线映射为切点 ,解决求二次曲线的切线和切点的问
2) cut-off point
切点
1.
Optimal variables and corresponding cut-off points for identification of cardiovascular risk factors clustering among elderly males
老年男性心血管危险因素聚集适宜指标和切点
2.
Objective To study the optimum cut-off points of waist circumference and/or body mass index(BMI) for identifying obesity-associated metabolic syndrome.
目的分析代谢综合征中腰围(WC)/体质量指数(BM I)的适宜切点。
3.
Objective To discuses the cut-off point of 2-hours postprandial glucose and its application on screening for undiagnosed population.
目的探讨早餐后2h血糖(2hPG)在糖尿病筛查中合适的切点及其在糖尿病筛查中的应用。
3) point of tangency
切点
1.
Starting from loading conditions of lifting steel wire ropes, this paper makes more detailed analysis on the static stresses of the steel wire ropes, pointing out that the maximum loading point is at the point of tangency of steel wire rope's pendulous section and the hoisting sheave.
从提升钢丝绳的受力情况入手 ,对钢丝绳静应力做了较详细的分析 ,指出钢丝绳在悬垂段与天轮切点处为最大受力
2.
This paper studied the case that there is a known point of tangency of a circle and a parabola while the center of the circle is on the recession of the parabola.
应用数形结合的方法,研究了已知圆与抛物线有一个切点,而圆心在切点处抛物线的凹向的情形。
4) tangential point
切点
1.
This ar-ticle,taking two spares as an example,explains the coordinate calculational method of the straight line and the circular arc tangential point as well as the circular arc and the circular arc tangential point so as to provide a new approach to the calculation of coordinate fig-ures of some special points.
现以2个零件为例,介绍直线与圆弧切点以及圆弧与圆弧切点坐标的计算方法,以便为特殊点坐标值的计算提供新的思路。
5) point of contact
切点
1.
In the reading teaching, the choice and application of the point of contact and penetration point is both the concrete reflection of dialectical u-nity of science and art of Chinese teaching design and the consequence of the harmonization and unity of the teaching form and content.
语文教学设计是语文教育思想、思维流程和教学艺术优化和物化的体现,而阅读教学中的切点与切入点的选择与运用又是语文教学设计的科学性、艺术性辩证统一的具体反映,是教学形式与教学内容和谐统一的结果。
补充资料：切触几何
数学上，切触几何是研究流形上的完全不可积超平面的几何。根据弗洛比尼斯定理，这个（大致来讲）可以通过叶层结构的不成立来识别。作为它的姐妹，辛几何属于偶数维的世界，而切触几何是奇数维的对应几何。
切触几何和辛几何一样在物理学中有广泛的应用，例如，几何光学、经典力学、热力学、几何量子化、以及诸如控制论这样的应用数学。它也可以用于证明有趣的事情，例如‘你总是可以平泊你的汽车，只要空间足够大’。切触几何有很多低维拓扑中的应用；一个这种相关性的表现就是每个三维流形都有一个切触结构。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条