查询词典 inverse cosine

To resolve the question about direction cosine when three-COMERO produced by COORD3 works, the formula of direction cosine of every probe is demonstrated in geometrical relationship from the explanation about gauging and qualification of probe, which provides academic proof for the probe worked correctly.

摘 要：针对COORD3公司三坐标测量机使用中有关方向余弦的疑点，从探针的标定和校正入手，对每个探针的方向余弦公式进行了几何关系上的论证，为探针的正确使用提供了理论依据。

Furthermore, we show that every generator of a nondegenerate distribution cosine function generates a regularized cosine function.

自然地 ，我们可以考虑一类退化型的分布余弦函数，并讨论该分布余弦函数与二阶 Cauchy问题、积分余弦函数及其其它类型余弦函数的关系。

The relations between the center of time gravity of the ultrashort cosine-Gauss pulse and the absolute phase, the parameter of the cosine function are studied.

河北科技大学经济管理学院，石家庄 050018研究了几周期超短余弦-高斯脉冲的时间重心与绝对相位以及与余弦函数参量之间的关系。

If force was a sine or cosine law changes, was stable after the forced vibration also a sine or cosine law changes.

如果强迫力按正弦或余弦规律变化，则稳定后的受迫振动也按正弦或余弦规律变化。

To further improve frequency convener s performance,perfect phase-controlled theory and reduce voltage wave-shape s harmonic component,based on cosine interpenetration law the paper presents symmetry cosine law to better trigger points.

为了进一步改善变频器的性能，完善相控理论，减少输出电压波形的谐波成份，在余弦交截法的基础上，提出了用对称余弦法对触发点进行优化。

First of all, this paper selected a wide range of spectral response, short response time, photoelectric conversion efficiency, pn junction area of silicon photovoltaic cells, as the light meters photoelectric conversion of the probe, and it creates a separate probe light and increase to the filter and cosine amended, and separated from the fuselage, better adapted to the cosine law and improve the measurement accuracy and scope.

首先，本文选用了光谱响应范围宽，响应时间短，光电转换效率高、pn结面积大的硅光电池作为光照度计的光电转换的探头，并把它做成一个单独的光探头，并加了以v滤光器和余弦修正器，与机身分离，更加适应余弦定律，提高了测量的精度和范围。

Also, the calcuated results on the angular distribution of backscattered electrons seem not to follow a cosine a cosine law for both the lower energies as well as the medium with larger mean atomic number.

入射电子能量较低，介质平均原子序数较大时，计算的背散射电子角分析不服从余弦分布律。

Cos public static double cos Returns the trigonometric cosine of an angle. Parameters: a - an angle, in radians. Returns: the cosine of the argument

Cos函数返回三角的余弦函数，参数a是一个以double类型的弧度表示的角值，返回类型为double。

In this paper,a design method of two dimensional Linear Phase Nearly Perfect Reconstruction filter banks based on a new class of cosine modulation systems is presented,which can be described as follow: firstly,the Parks-McClellan algorithm is adopted for designing the prototype filter,then by employing cosine modulation,a series of analysis and synthesis filters can be obtained,accordingly a one-dimensional LP-NPR filter banks can be constructed;Secondly,cascading two one-dimensional LP-NPR filter banks in the form of tree structure and using the unimodular transformation,a two dimensional nonseparable LP-NPR filter banks can be obtained.

提出了一种基于一类新余弦调制系统的二维线性相位-近似完全重构滤波器组的设计方法，设计过程分为两个步骤：首先采用Parks-McClellan算法来计原型滤波器，再经过余弦调制能到一系列的线性相位分析和综合滤波器，从而可以构造一维LP-NPR滤波器组；然后利用树状结构来结合两个一维LP-NPR滤波器组，并运用单位模变换，可以得到二维不可分离LP-NPR滤波器组。

By the perturbation theorem of cosine operator functions,one perturbation result for C-cosine operator functions is obtained.

而对于扰动问题的研究向来是十分重要的，因为这类研究是获得丰富理论的基本途径之一。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。