rotation method

A new method, rotation-assemble-average method, for the oscillatory boundary layer flow around a cylinder, was proposed.

提出了一种用于模拟圆柱绕流的振荡边界层流动的新方法 —— 旋转系统平均法.

A Derivation of Velocity and Acceleration in Spherical Coordinate by Rotation Reference Frame Method

球坐标系中速度与加速度的转动参考系求法

A four-accelerometer based test method for measuring rocket rotation angle is put forward in this paper and its theoretical error is comprehensively analyzed.

提出利用四只加速度计测量火箭弹自转角的方法，详细地讨论了该方法的测试原理误差。

Considering beam sagging moment capacity, joint moment capacity, joint rotation capacity and required rotation capacity, the plastic analysis method is suitable for the design of beams for semi-rigid composite frames under vertical loads at ultimate limit state.

塑性分析方法考虑了组合梁的跨中弯矩承载力、节点弯矩承载力、节点转动能力和设计需要的节点转动能力，适用于竖向荷载下半刚性连接组合框架梁的承载能力极限状态设计。

The results are as follows: ( 1) Classification process of industrial lignin used the improved acid precipitation method were influenced by the acid type, alkali concentration, temperature, classification pH and rotation speed.

研究结果如下：（1）改进的酸析沉淀法分级纯化工业木质素的过程中受酸的种类、碱液浓度、酸析温度、分级pH、离心转速多因素共同作用。

The method only use inclination data, therefore, the analysis to tectonic rotation is more reliable.

该方法是基于剩磁倾角数据，从而避免了偏角误差的影响，提高了分析的可靠性。

The front ones fixed, the rear ones mobile with adjustment and method to fix in the drum when you get constant rotation, I used one bolt and nut in each magnet.

前方固定的，后面的移动调整和方法定在鼓当你不断旋转，我用了一个螺栓和螺母，在每个磁体。

The Application of the Definite Integral& the Rotation Method

定积分的应用&旋转法

A three-phase bridge outside the circuit is built in finite element method. The stator coils are energized by a certain strategy. The starting performance of the rotation speed and rotation torque of the PM spherical motor is studied.

在有限元里，搭建了三相桥式外电路对定子线圈进行换相通电仿真得到了永磁球形电动机的自转转速及自转转矩的启动性能。

In addition to the daily radio gymnastics practice outside, still can broadcast the gymnastics competition, and so on, many projects rotation method, develop diverse models.

除了日常的广播体操练习外，还可以进行广播体操的比赛等等，多项目轮换法，开展模式多样化。

Also the paper presents an improved method of license plates tilt correction, which combines edge detection and rotation projection to calculate the tilt angles and corrects the titling images of the license plate steadily by bilinear interpolation rotation.

之后本文又提出一种改进的车牌倾斜校正方法，采用边缘检测与旋转投影相结合的方法求取车牌的倾斜角度，之后使用双线性插值旋转方法稳健地校正了倾斜车牌区域图像。

A New Method of Three-point Perspective Drawing& Method of Rotation

三点透视作图新法&旋转法