轴旋转

Find the volume of the solid of revolution of the area bounded by the curves y = tan x, y = 2c os x and x = 0

c 求由曲线 y = tan x、y = 2c os x 及 x = 0 所围成的区域绕 x 轴旋转所得旋转体的体积。

Having the shape of a spheroid generated by rotating an ellipse about its shorter axis.

扁圆的，椭圆的绕其短轴旋转椭圆而得到的球形的

No, you don't need to remember how to compute the surface area of a curve when rotated about the x axis.

不，你不需要去记如何求一个绕x轴旋转的曲面的表面积。

For x-axis rotation, we have the matrix

对于x轴旋转，我们有矩阵

With the three axes circumrotation method, the position of the incident laser is unchanged, and the conversion from the complicate three-dimensional spatial position relation into a two-dimensional plane is realized, by adjusting the relative positions of the detector and the target with certain spatial conversion relation.

采用三轴旋转方式，保持入射光源的位置不变，调整探测器和待测目标的相对位置，配合一定的空间转换关系，实现了将复杂的三维空间位置关系转换到二维平面进行调节。

A coordinate was established with the horizontal, vertical and optical axis defined as the X, Y and Z axis. A circumrotation was then made.

通过建立三维座标系、座标轴旋转、解方程组，求得各个子午线上的二次曲线表达式及Q值。

In order to analyze aberrations qualitatively, a diffract model of centro-symmetrical optical system has been constituted to simulate the diffract pattern of primary aberrations and second aberrations. Then diffract pattern\'s character of each aberration has been analyzed, and the typical pattern with the value\'s change is given.

为了进行定性分析，文中首先建立了一个共轴旋转对称系统的光学衍射模型，模拟了初级像差和二级像差的衍射图像，并逐个分析了初级像差和二级像差的成像特征，给出了伴随波像差数值变化的典型(来源：8ebeAebBC论文网www.abclunwen.com)图像。

A system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis .

至少一个轮轴围绕另外固定轴旋转的传动装置系统。

Based on basic principle of nonlinear continuum mechanics, the amelioratedGudehus-Bauer hypoplastic model considering principal stress axes rotation is presented.

5基于非线性连续介质力学的基本原理，提出了一个考虑主应力轴旋转的改进的Gudehus-Bauer亚塑性模型。

The results show that the revised Gudehus-Bauer hypoplastic model can take strength and deformation of sand under principal stress axes rotation into consideration.

结果表明改进的Gudehus-Bauer亚塑性模型可以考虑主应力轴旋转对砂土强度和变形特性的影响。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。