查询词典 cosine function

At the same time, according to the CMM operational principle and the direction cosine of geometric elements, a thought of using direction cosine to analyze the oversize geometric tolerance reasons was proposed and its relevant example was shown, which can expand the way of quality analyses and guide to produce eligible machine parts.

同时在描述三坐标测量机工作原理和几何元素方向余弦的基础上，提出了利用方向余弦进行形位公差超差原因分析的总体思路，并辅以实例，这一办法拓宽了产品质量分析手段，有助于指导制造出合格的机械零部件。

Based on the description of three-COMERO operational principle and the direction cosine of geometric element, a thought that uses direction cosine to analyze reasons of oversize geometric tolerance is advanced and relevant example is showed, which can expand the way of analyzing quality and direct to produce an eligible machine part.

在描述三坐标测量机工作原理和几何元素方向余弦的基础上，提出了利用方向余弦进行形位公差超差原因分析的总体思路，并辅以实例，拓宽了产品质量分析手段，有助于指导制造出合格的机械零部件。

The so called indirect integral operation means that Eular angles can be gotten from the direction cosine matrix which is received by the integral operation of quaternions or direction cosine.

飞行器导航中，姿态角的获取可以通过直接或间接的积分运算求得的，所谓间接获取即是指通过四元数或方向余弦的积分运算求得姿态矩阵，再从姿态矩阵中提取姿态角。

Direction cosine analysis based on winmeil;2. According to the directioncosine formula in hexahedron tubular hea ter,the direction cosine of energy bind in inclined and symmetry tubular heater is stuided.

分析了用蒙特卡罗法计算加热炉辐射传热时能束的发射方向和行程长度，根据六面体加热炉中能束的方向余弦公式，对斜顶对称加热炉中发射能束的方向余弦进行了研究，得到了其修正公式，对斜顶壁面相交坐标进行了修正。

This procedure is based on discrete cosine transform DCT-formula implemented procedures to help beginners understand the discrete cosine transform process.

详细说明：这个程序是根据离散余弦变换的公式实现的DCT变换程序，能够帮助初学者理解离散余弦变换的过程。

The JPEG standard algorithm ; arithmetic fourier transform; discrete cosine transform; fast discrete cosine transform

JPEG标准算法；算术傅立叶变换；离散余弦变换；快速离散余弦变换

Pairs of images FFT transform and inverse transform example, discrete cosine transform and cosine inverse transform.

详细说明：对图像进行FFT变换和反变换的例子，离散余弦变换和余弦反变换。

This procedure according to the formula to achieve the inverse discrete cosine transform, you can write your own validation of discrete cosine transform is correct, understanding the formula help.

详细说明：这个程序根据公式实现了离散余弦逆变换，可以验证自己编写的离散余弦变换是否正确，对理解公式有帮助。

MDCT (Modified Discrete Cosine Transform) and IMDCT (Inverse Modified Discrete Cosine Transform) are two of the most complex computation modules.

改进离散余弦变换与其反变换是当今主流音频压缩标准中普遍采用的时频变换单元，也是计算量最密集的模块之一。

In every period, do the following operations:# For each 8*8 block, do the discrete cosine transform, then take out direct current coefficient in each block, using the transformation above for each DC coefficient, the gold stands for the code of the spread-spectrum we use when embedding the different watermark bit in different frames, after all of the watermark information which we want to embed is embedded, then do the inverse discrete cosine transformation, and store the current frame in a new file.

于是利用DCT变换域的这点重要的几何不变性，我们可以推导出一种能够抵抗几何攻击的视频水印算法，即将所需要嵌入的水印信息以127位扩频序列作为辅助，以求和值形式嵌入到DCT变换后的每个宏块的每个DC系数当中，具体嵌入和提取算法如下：根据使用的扩频序列的长度N，基于相关的嵌入器需要选取包含N帧的视频子序列，令这N帧视频子序列作为一个嵌入周期，对于每N帧视频子序列做如下的操作，#即对于每个8×8的像素块进行DCT变换，然后取出每个DCT变换后的直流分量，对于每个DC系数，做如上所述的变换，其中gold为在第k帧中嵌入第i位水印信息时使用的扩频码字值，待将所有需要嵌入的水印信息全部嵌入后，再做反DCT变换，保存当前帧。

Newly designed quick-refill fuel tank cap and dust proof radio box back-up their impressive form by also contributing to the low center of gravity.

新设计的快速填充油箱盖和防尘电台方块备份其令人印象深刻的形式也有助于低重心。

The book is a spin-off from his master's thesis.

这本书是他的硕士论文的派生作品。