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曲率

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A closed calculation form of the curvature is given based on the theory of matrix.(7)A case study of high slope reinforcement is presented. The whole process of the uplift test and the computer simulation of cable are expatiated. The excavation of the slope with or without reinforcement is simulated by numerical method.

利用矩阵理论给出了求解曲率的简化算式,提出了一种相关变量可靠度计算的实用二次二阶矩法;(7)借助某高边坡支护工程,详述了锚索极限抗拔试验和数值模拟。

The Department of CRT without a subtle, and its positioning on the major markets for low-end consumer, and there will be skills-oriented, the use of SM-structure, by calculating the curvature and refraction of light form a "flat."

这款显像管无可圈可点之处,其主要市场定位就为中低端消费者,因此以实用为主,采用荫罩式结构,通过计算曲率和光线折射形成"平面"。

The convex deadrise adds curvature and form to the hull bottom and the wide beam which carries aft increases lifting motion in a seaway.

凸deadrise增加曲率和形式向船体底部和宽束载尾部增加了起重机械的议案,在海运。

A new curvature-based algorithm in free-form curve fitting was proposed to fit a 2D NURBS profile with an arc spline ,where a new form of curvature formula with matrix representation was also proposed,and then the arc spline tool path with G~(1) continuity was generated.

给出了一种平面曲线轮廓的圆弧样条拟合及刀具路径生成算法,该算法面向零件轮廓的光顺性刀具路径生成,通过应用曲线的曲率关系,对以NURBS表示的被拟合自由曲线按参数递增的方向用G1连续的圆弧或直线段逐段拟合,并生成相应的圆弧样条刀具路径,从而实现零件曲线轮廓表面的光顺加工。

Submanifold; Homology group; Topological sphere theorem; L~2 harmonic 1-forms; Ends; Eigenvalue; Mean curvature; Second fundamental form

基础科学,数学,几何、拓扑子流形;同调群;拓扑球面定理; L~2调和1-形式;端;特征值;平均曲率;第二基本形式

The curvature of a curve; the magnitude of the derivative of its unit tangent vector with respect to distance on the curve:.

曲线的曲率;为单位切向量对距离取导数所得向量的大小

A method of construct a quadratic uniform B-spline curve through data points is given.If the relative curvature of a certain curve on the first control point and the direction angle of the first port's tangent vector is given,here can get the whole curve by using the character of the port of quadratic uniform B-spline curve.

提出了一种二次均匀B样条插值曲线的构造方法,首先给定某一段曲线首点的相对曲率和该段曲线的首端切矢量的方向角,利用二次均匀B样条曲线的端点性质,求出其余各段曲线控制顶点,来生成整条插值曲线。

DT/ds| The curvature of a curve; the magnitude of the derivative of its unit tangent vector with respect to distance on the curve:|dT/ds

曲线的曲率;为单位切向量对距离取导数所得向量的大小

They described a method to estimate the tensor of curvature of a surface at the vertices of a triangular mesh.

他们描述了一种在三角网格上任意点估计曲率张量的方法。

Based on the definitions of metric tensor and curvature tensor, the full expressions of their changes are put forward with asymptotic analysis, where the metric tensor change expression coincides with Ciarlet's, and the curvature tensor change expression is described more accurately than Ciarlet's.

提出的度量张量的改变量与Ciarlet给出的一致,而曲率张量的改变量比Ciarlet给出的更精确。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。