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tangent point
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  切点
     Let {s~1∨s~2,y_0} be the union of two circles s~1,s~2 with common tangent point y_0.By defining a finite 'point sequence' to each closed path in {s~1∨s~2,y_0},a new proof was given to the non-commutativity of the fundamental group π_1(s~1∨s~2,0).
     设{s1∨s2,y0}为具有公共切点y0的两个圆s1、s2的并集,通过对s1∨s2中的每一个闭路径定义一个“点列”,给出基本群π1(s1∨s2,y0)非交换性的一个新的证明.
短句来源
     For a given tangent polygon, a tangent point and two Bzier points are defined, two cubic Bzier curve segments are constructed. By choosing approarite adjustable parameters λ_i, μ_i, ρ_i, the cubic Bzier spline curve is C2-Continuous, which proves that the cubic Bzier spline curve is shape preserving to the given tangent polygon.
     对于给定的切线多边形 ,在每条边上定义 1个切点及2个Bzier点 ,从而在 2个切点之间构造 2段 3次Bzier曲线 ,通过选取合适的调节参数λi,μi,ρi,3次Bzier曲线段是 2阶几何连续的 .
短句来源
     (2) An useful property of the error ellipse is revealed and proved: 'The random point withtwo-dimensional normal distribution falls on one side of the tangent line of the error ellipse with a constant probability, and this probability is independent of the tangent point'.
     (2) 发现并证明了误差椭圆的一个性质,即“随机点落在误差椭圆切线一侧的概率为常数,该常数与切点坐标无关”。
短句来源
     By changing the value of r,the curves can be made approximate to or be far from the control polygon,that is, the position of the tangent point begins to change,and the established curves can be changed into the extended quadratic Bezier curves at particular values,thus gaining a method of mutual transform of B-spline curves and Bezier curves.
     通过改变r的取值,除了使曲线逼近或远离控制多边形,即切点位置发生变化外,在特殊值下还能使建立的此曲线转化为扩展了的二次Bezier曲线,从而找到使B样条曲线与二次Bezier曲线相互转化的一种方法;
短句来源
     The blending functions with a tangent point parameter r,λ~~*_i,and a parameter λ_iare generated based on the blending functions with the parameter λ_i.
     基于给出的带参数的调配函数,文章建立了一个带切点参数r和iλ*、iλ的调配函数。
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  “tangent point”译为未确定词的双语例句
     The Supporting technology appliance in anchor spry-net of heavy section in tangent point
     锚网锚索支护技术在大断面综放切眼的应用
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     In recent years, centering on the main line of improving teaching quality, proceeding from the renewal of ideas, by the tangent point of teaching reform, with the driving force of optimization in educational structure, and with the security of original administration, our university constantly strengthens the adaptability to the society and improves the quality of talents training.
     近年来 ,我校围绕提高教学质量这一主线 ,从观念更新入手 ,以教学改革为切入点 ,以教育结构优化为动力 ,以管理创新为保障 ,不断增强自身的社会适应性、提高人才培养质量
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     It is noted that at the tangent point of the travel-time curves of diffracted and reflected waves, the amplitude of the diffrated wave is maximum, but the phase is opposite to that of the reflected wave.
     其优势频率振幅谱与反射波的相同,在衍射波与反射波走时曲线相切处附近,记录图中出现衍射波最大振幅,且波反相;
短句来源
     And based on the optimum target that the maximum slope of the tangent point must be minimum, a more reasonable mounting location of the die is worked out, which satisfies the constraint conditions of the movement range of the lateral pressure wheel, the maximum swing angle of the main cylinder, and the distance from the collet of the supplementary cylinder to the center of the rotary.
     并根据轨迹上最大切线斜率最小的优化目标,以侧压轮运动范围、主缸最大允许摆角及补拉夹头与转台中心的距离为约束条件,计算出模具的最佳安装位置。
短句来源
     And the slipping, the tangent point variety of the track cables against the saddles are analysed in this thesis. An analytical program is developed applying the Visual Basic6.0 to analyse the cable-hoisting system.
     为了分析缆索吊装系统,笔者采用Visual Basic6.0开发了其分析程序。
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  相似匹配句对
     On the properties of tangent lines at a point on surface
     曲面上一点处切线的性质研究
短句来源
     EOMETRIC CONTINUITY FOR HYPERQUADRICSURFACES AT A TANGENT POINT
     二次超曲面在切点的几何连续性
短句来源
     It is the point of the thesis.
     这章将展现陈蝶仙作为文人的一面。
短句来源
     The boiling point (b. p.)
     脂肪醇沸点(b.p.)
短句来源
     On the Geometrical of the Conic Tangent
     二次曲线切线的几何性质
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  tangent point
These occultation data have been used to determine the ozone number density profile at the occultation tangent point.
      
This approach fails to describe the notch length effect, because a tangent point between theKR andK curves was not found and because of a strong dependency of the maximum fracture resistanceKRmax on notch length.
      
The tangent point simplex Ω' of a simplex Ω is the pedal simplex of the incenter of Ω.
      
Some Geometric Inequalities for a Tangent Point Simplex
      
Compared to the other receivers, the IGOR instrument exhibits a superior tracking sensitivity and is thus best suited for occultation measurements with low tangent point altitudes.
      
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In recent years advances in shipbuilding industry have stimulated considerable interest in the development and use of practical algorithms for the interpolation and approximation of points. A method for interpolating and fitting a curve through points is described here. Cubic polynomials in local coordinate systems are used to obtain an interpolating curve with continuous first and second derivatives.The nonlinear equations are rapidly solved by ordinary Newton iteration because the basic iterative...

In recent years advances in shipbuilding industry have stimulated considerable interest in the development and use of practical algorithms for the interpolation and approximation of points. A method for interpolating and fitting a curve through points is described here. Cubic polynomials in local coordinate systems are used to obtain an interpolating curve with continuous first and second derivatives.The nonlinear equations are rapidly solved by ordinary Newton iteration because the basic iterative step involves only atridiagonal linear system and the good initial estimates for ri's are made. The tangent vectors are refined to avoid the unwanted inflections when the large variations in slope between neighboring points occur, and an example to show the refinement by local interpolation methods is given.The resulting curve will be a chain of bi-arcs, the common tangent points of which are chosen on the spline to ensure a better approximation.

对于离散的型值点,本文采用转轴三次样条曲线拟合,再用公切点取在样条曲线上的双圆弧逼近,既保证了线型的光顺性,又便于图形的贮存、传送和再加工。经实践证明,用上法绘出的图形光顺性好、精度高,完全符合生产要求。

Let the knotes Pi(i=0,1,…,n)be given in a plane,T~0、T~n be the tangent dire- ction at P_o and P_n respectively.In this paker,the authors propose a principle of extreme (α_i-β_i)~2=min and determine the other tangent directions T~i with these α_i A simple and important formula is as follows with this,the relation between the convexity and the locaticn of common tangent point is discussed in detail. A convenient algorithm is also given in this paper.

本文提出了一种决定双园弧样条节点处切向的极值原理,指出了“切线”与“切向”在决定曲线形态方面的差异。文中还给出了公切点参数与其它各参数间的一个简单关系,并对公切点的选取问题作了较系统的讨论,指出了它与保凸性的一定关系。

This article describes theoretically that the tangent point moving trace of two pitch circles of the engaged gear pair when gear eccentric error exists, is a circle, analyses the turning angle error and the idle turning error resulted from eccentric error. the author shows here somes inadequacies in the calculation formula about turning angle error arisen from eccentric error mentioned by W. Michalec [3], and then deduces the corresponding calculation formula thcore tically.

本文从理论上阐述了存在齿轮偏心误差时,一对相啮合的齿轮两节圆切点的运动轨迹为一圆。分析讨论了齿轮偏心误差所引起的转角误差和空回误差,对W.Michal(?)《精密齿轮传动装置——理论与实践》一书中推荐的偏心误差所引起的转角误差的计算公式中不妥之处提出自己的看法,并从理论上推导了相应的计算公式。

 
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