正弦曲线

1The axial evolution law on the structure and the aerodynamic characteristics of the asymmetric flows around slender bodies of revolution at incidences is summarized:whether the flow asymmetry is powerless or powerful,the flow always appears in the structure that lee-side vortices rise,and shed vortices form,and new lee-side vortices come into being alternately on opposite sides of a slender body of revolution axially from nose apex downstream to afterbody,and always induces the sectional side force of waving quasi-sinusoidally downstream axially.

1总结出细长旋成体有攻角非对称绕流流场结构和气动力特性的轴向演化规律：无论非对称性强弱，沿轴向从头部尖顶往后体，非对称绕流总是呈现为左、右两侧背涡交替从物面向上飘起、形成脱落涡、再衍生出新生背涡的流场结构，并诱导出沿轴向呈类似正弦曲线形式振荡分布的截面侧向力。

With this approximation, detailed error analysis was completed, and two new methods were proposed: the like triangle method and the sinusoid method.

通 过对经典计算方法的误差分析，推出了2种新的计算方法：相似三角形法和正弦曲线法。

YCB-G-type insulation gear pump is external gear pump, gear for the arc sine curve plus compound formed.

YCB-G 型保温齿轮泵属外啮合齿轮泵，齿形为圆弧加正弦曲线复合而成。

Unique feature: the gear uses has the international the 80s advanced level new technical -- double circular arc sine curve tooth.

齿轮采用具有国际八十年代先进水平的新技术——双圆弧正弦曲线齿型。

The traditional collector rig, like contact slip collector ring and noncontact telegraph collector ring, can not be used in high rotational speed and loud noise background.

理论和试验研究发现，相比于直线修形和抛物线修形，正弦曲线修形在很大的工况范围内，具有良好的减振、降噪效果，特别是对于减小高频成分的振动效果更明显。

The temperature on the outer surface of the buried pipe and on the concentric circle around the buried pipe shows a sinusoidal profile.

地埋管外土壤沿与地埋管同圆心的圆周上温度呈正弦曲线分布。

The vibration vision of the simple harmonic motion is a sine curve.

三，简谐运动的振动图象是正弦曲线。

The high resolution image of full hole can be obtained from the being processed imaging logging information, and the morphological features about intersecting lines of fracture face and borehole present monocyclic sine curve.

成像测井数据经处理后可得到全井壁高分辨率的图像，而裂缝面与井筒的交线在图像上的形态特征呈现为单周期的正弦曲线，应用哈夫变换的点－线对偶性拾取图像中的裂缝角度等信息，可得到较好的处理结果。

To analyze the response of pavement structure under moving loading, a quarter vehicle model with single freedom degree and unevenness model are established. The dynamic loads are calculated through combining different pavement conditions and speed. When the incentive frequency which is passed to vehicles by the road is close to its own vibration frequency, vehicles will produce the greatest dynamic load.

为了分析路面结构在行车动荷载作用下的力学响应，建立了单自由度1/4车辆模型和以正弦曲线模拟路面不平整度的模型，通过将不同路面状况和行车速度的组合，分析车辆在各情形下所产生的动荷载，发现路面传给车辆的激励振动频率接近车辆自身振动频率时，车辆对路面产生的动荷载值最大。

Analysis of a periodic function into a sum of simple ''.

周期函数解成简单正弦曲线之和的分析。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。