余弦圆

The abscissa at the endpoint of an arc of a unit circle centered at the origin of a Cartesian coordinate system, the arc being of length x and measured counterclockwise from the point(1,0) if x is positive or clockwise if x is negative.

余弦以笛卡儿坐标系原点为圆心的单位圆的圆弦端点的横坐标，弧的长度为x，如果x为正，弧的长度则从（1，0）点按逆时针方向算起，若x为负，则按顺时针方向从（1，0）点算起

The abscissa at the endpoint of an arc of a unit circle centered at the origin of a Cartesian coordinate system,the arc being of length x and measured counter clockwise from the point(1,0)if x is positive or clockwise if x is negative.

余弦以笛卡儿坐标系原点为圆心的单位圆的圆弦端点的横坐标，弧的长度为x，如果x为正，弧的长度则从(1，0)点按逆时针方向算起，若x为负，则按顺时针方向从(1，0)点算起

The digital down converter adopts octant mapping algorithm and utilizes the symmetry of sinusoidal value and cosine value to divide [0, 2 Pi] into eight sections.

本数字下变频器采用八分圆映射算法，利用正弦值、余弦值的对称性，把[0，2π]分成8个区间。

Using particle image velocimetercombined with CFD dynamic mesh,an experimental and simulation study was carried out on flow field in the near-wall region outside a vibrating tube.The charts of velocity vector of flow field outside the tube under five conditions with amplitude 1.3 mm and frequency 5—25 Hz were obtained,and the cosine of average synergy angle of flow field outside the tube was calculated.

采用粒子图像测速与CFD动网格相结合的方法，对振动圆管外近壁区流场进行了实验及模拟研究，得到了振幅1.3 mm、频率5～25 Hz范围内的管外流场速度矢量图，计算了不同工况下管外流场的平均场协同角余弦值。

By means of the present model certain phenomena related to the nonlinear acoustic properties of an orifice, such as the roll-up of the shed vortex sheet and the forming of the Vena-Contracta are simulated. For a sinusoidal sound pressure, the time- history of the average velocity through the orifice is computed, and the nonlinear distortion of the velocity is examined by means of the Fourier decomposition.

依据此模型，对圆孔声学非线性效应的若干特征现象进行了数值模拟，如脱落涡层的卷曲，Vena收缩段的动态形成；在孔板前声压按余弦规律变化的情况下，计算了孔中平均速度的时间历程，并借助于Fourier分解分析了孔中平均速度的畸变情况。

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。