查询词典 length of arc

An incremental-iterative method based on the Newton-Raphson method combined with constant arc length of incremental displacement vector is employed for the solution of nonlinear equilibrium equations.

本文解非线性平衡方程式式的数值计算方法是基於牛顿－拉福森(Newton-Raphson)法配合弧长控制法的增量迭代法。

An incremental-iterative method based on the Newton-Raphson method combined with constant arc length of incremental displacement vector is employed for the solution of nonlinear equilibrium equations. The subspace iterative method is used for the solution of natural frequencies and vibration modes for the free vibration of beam structures.

本研究推导元素的节点惯性力时，先将元素扰动位移表示成当前固定元素座标的扰动位移和旋转之函数，故可直接求得元素的节点惯性力，元素的一致性质量矩阵可由元素节点的惯性力对元素节点的加速度微分求得。

Based on the arc length formulae of the parallel to the easement curve and its property, this paper gives the parameter equations of the parallel to the easement curve taking the arc length itself as variable.

基于缓和曲线平行线弧长公式及其性质，给出了缓和曲线平行线以其自身弧长为变量的参数方程。

According to the plane cross section assumption, configuration of a rod is expressed as a history of the cross section with arc coordinate. A special solution which stands for equilibrium in straight line state is obtained from differential equilibrium equation. Linear perturbation equation is derived and its general solution is obtained in which the integral constants are determined by constrained conditions at two ends of the rod. The condition of existence of non zero solution of the integral constants gives to the Greenhill formula of exact elastic rod model, which shows that the boundary of stable area is a closed curve and of symmetry, and inference of shearable and extensible to stability of the rod is depend on three factors: difference between flexibility of shear and extension of a section of the rod, bending stiffness and the length of the rod.

基于平面截面假定，弹性杆的位形表达为截面的弧坐标历程，根据平衡微分方程得到了两端受力螺旋作用时的直线平衡特解，导出了线性化扰动方程及其通解，积分常数根据两端铰支时的边界条件确定，并根据其存在非零解的条件得到弹性直杆精确模型的Greenhill公式，表明稳定域为一对称的封闭区域，拉/压和剪切对稳定性的影响取决于：拉/压柔度与剪切柔度之差，抗弯刚度和杆长这三个因素

Years ago, the great mathematician Archimedes trisection of an arbitrary angle with compass, ruler, and mark points on the feet, so that mark point to the foot end of the length of the radius is equal to angle; to straightedge movement, so that mark-point arc always on the move, adjust, and when the foot end of the marking points on the feet, and other requirements that have a total of three points simultaneously in ruler now has been online; a total of nine actions to complete.

2400年前，大数学家阿基米德作任意角三等分，用圆规，直尺，且在尺上做记号点，使记号点至尺端的长度等于角圆弧半径；将直尺移动，使记号点始终在圆弧上移动、调整，当尺端、尺上记号点、和其它有要求的一点，共三点同时在直尺的一直线上；共九个动作完成。

Further, each blade has, in the radial direction, a sweepforward wing portion situated on the boss side and exhibiting a positive advance ratio value, and a sweepback wing potion situated on the outer peripheral side of the blade and exhibiting a negative advance ratio value, with the arc length of each blade increasing from the boss side toward the outer peripheral side.

并且，叶片(4)具有轮毂侧的前进叶片部(2)和叶片的外周侧的后退叶片部(3)，前进叶片部在半径方向上具有前进率为正的值，后退叶片部具有负的值。

The parameter equation, tangent, normal plane, the length of the arc, curvature, the basic equation of the spatial curve, torsion and the equation of the curve in flat surface etc.

为解决实际中各种空间共轭曲面问题，分析和评价各种传动装置的几何特性和传动性能，为探索新型的传动装置奠定基础。

The analysed group consisted of 54 eyes excluding pre-ARC tractional retinal detatchment or neovascular glaucoma, follow-up time less than 3 months. The mean duration of vitreous hemorrhage was 7 months and 3 weeks. The length of follow-up averaged 8.3 months.

除冷冻治疗前即有牵引性视网膜剥离或血管新生性青光眼及追踪时间少於三个月片，共有54只眼睛列入统计分析中；玻璃体出血平均时间为七个月零三周，这踪平均长达8.3个月。

A unit of astronomical length based on the distance from Earth at which stellar parallax is one second of arc and equal to 3.258 light-years, 3.08'×03 kilometers, or .98 × 0 3 miles.

秒差距：天文学自地球起的距离单位，星视差为角秒，等于3.258光年，3.08'×03公里，或。98×0 3英里

A unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years.

测量恒星距离的天文学长度单位；一秒差距等于三十万亿公里。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。