切线

Construct an animation showing the tangent sweeping out the interior of the astroid.

建构一动态绘图：展示星状线的切线所有扫掠过的内部轨迹。

Construct an animation of three concurrent tangents of the astroid.

建构一动态绘图：展示星状线共点的三切线。

Tension moves asymptotically toward the direction of the ''.

最大张力的方向是逐渐趋进于切线的方向。

Here, the dual nonlinear tangental stiffness matrixes of binodal spatial beam element and triangular plate/shell element of 6 nodal DOF to Update\|Lagrange coordinate systems are derived, the incremental equation of virtual work is linearized to simplified calculation,beam\|plate coupling,deviation of principal nodes and subordinated no...

推导了三维桁元、梁元和三角形板壳元在UL描述下的双重非线性切线刚度矩阵，通过对增量形式虚功方程作线性化处理来减少计算量，考虑了梁／杆与板对应节点定位偏差和节点焊接安装误差，进而编制计算程序。

Methods When planning the double-lid procedure, the correction of epicanthal folds and creating double-lid were operated using asymmetric Z flap at medial canthal area in one-stage procedure.

方法在设计重睑成形术切线时，在内眦部应用不对称的Z成形术，Ⅰ期完成内眦赘皮的矫正和重睑成形术。

Theory; the spatial meshing theory includes comparative motion, comparative differential and conjugative curved surface; and the application of meshing theory includes gear drive and worm drive. The spatial meshing theory is the main part of the course.

课程的重点讲解内容有曲线的参数方程、切线、法面、弧长、曲率、空间曲线的基本公式、挠率及平面曲线的基本公式等；曲面第一和第二基本公式，法曲率、主方向和主曲率、欧拉公式、短程挠率、欧拉公式和贝特朗公式推广、相对法曲率和相对短程挠率等；刚体的绝对和相对运动速度、相对微分和绝对微分、相对速度和相对微分、轨迹曲面的法曲率和短程挠率等；空间共轭曲面的啮合条件、诱导法曲率、两类界限点、等距共轭曲面、空间啮合的二次接触原理等；蜗杆传动的数学模型建立及啮合特性分析方法等。

The presence of hyperpneumatization of the frontal sinus concerns with the angle from the line between the junctional point and attachment point of cribriform plate to horizontal line, with the more large angle, the more high rate of frontal gasification, and the more deep olfactory fossa.

额窦高度气化与眶板垂直切线与前颅底交点，这点与中鼻甲骨质筛板附着点的连线与水平线夹角的大小有关，这个夹角越大额窦高度气化发生的几率越大、同时嗅凹也较深。

The result makes clear: EThe tensile strength of TFE film increases somewhat along with the addition of drawing speed, and rupture outspread rate reduces;ETFE to succumb filmily somewhat along with the addition of drawing speed the addition that intensity follows drawing rate and increase somewhat, but the 2nd succumb intensity increases not big;ETFE to succumb filmily meet an emergency follows drawing rate increase somewhat, the 2nd succumb the amount of tangent and stretch model that meet an emergency reduces;ETFE film somewhat and model of the 2nd flexibility measure those who follow drawing rate to increase show downtrend, quantity of secant flexibility model and quantity of the 3rd stretch model do not have apparent change.

结果表明：ETFE薄膜的抗拉强度随拉伸速度的增加略有增加，而断裂延伸率随拉伸速度的增加略有减小；ETFE薄膜的屈服强度随拉伸速度的增加而有所增加，但第二屈服强度增加不大；ETFE薄膜的屈服应变随拉伸速度的增加略有增加，第二屈服应变则略有减少；ETFE薄膜的切线弹性模量以及第二弹性模量随拉伸速度的增加呈下降趋向，割线弹性模量和第三弹性模量则没有明显的变化。

A new kinematically admissible velocity field is constructed. On operating with a linear failure criterion that exceeds the actual nonlinear failure criterion, the objective function formulation of the upper bound theorem leads to a classical nonlinear programming problem where the objective function, which is to be minimized, corresponds to the dissipated power.

本论文在上限定理的基础上，首次提出&切线法&与非线性&序列二次规划&优化相结合的计算方法，使在非线性屈服下求解岩土承载力或稳定性问题成为可能，为上限定理的广泛应用开辟了新的途径。

Based on the model for FRFS problem,this paper improves the current solution to by combining branch-and-bound algorithm with partan algorithm and by selecting the most optimal schedule.

在 FRFS问题模型的基础上，将分枝定界法与平行切线法相结合，选取最优资源投入量，进而得到最优计划，完善了柔性资源计划问题的解法。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。