余弦

In the discrete cosine domain, the watermark is embedded by quantifying the coefficient of the DCT domain and watermark can be extracted without the original audio.

在离散余弦变换域中如何嵌入数字水印，会具有较好的脆弱性和透明性。

This dissertation selects two-dimension binary image as watermark information, and selects audio as embedding object, and embed the watermark in the coefficient of the DFT domain, the DCT domain, the DWT domain.

本文以直观的二值图像作为水印信息，以音频数据为嵌入对象，分别在离散傅立叶变换域、离散余弦变换域、离散小波变换域的系数上嵌入水印。

So sets must not exist in space. But as before, there is reason to doubt the cogency of such an inference.

我们可以承认纯粹集合类似余弦函数那样，不在任何时空中。

Its input signal should be large-signal, the collector current cosine pulse for a month.

其输入信号应为大信号，集电极电流为一个个余弦脉冲。

As the demanding of storage capacity by photographs increases sharply and numerical signal processing units become more and more cheap, effective techniques of lossy compression are generally seperated from some special hardwares and applied to table compter systems.

该文在分析了音频和视频数据同异点的基础上阐述了一种基于离散余弦变换的图像压缩方法，并给出了算法的基本步骤和一些技巧。

This example presents graphically the,(1). The confidence level and uncertainty limit of cosine of uniform R.V.

本例图示；(1)。均匀随机变数余弦之均值不确定范围之信心准位。

This article takes the teaching of conic sections as an example. By designing worksheets, teachers can introduce the historical material about conic sections to students. By way of using Apollonius' definition of parabola, ellipse and hyperbola, teachers can introduce the geometric aspect of "conic section" to students. By using the concept of " latus rectum " in Conics , we can connect "conic sections"-- representation of geometrical aspect, with "the equation of conic sections"-- representation of algebraic aspect to improving insufficiency of text books.

同时本文也试著从历史文本中寻找材料，简单举例说明数学教师可以如何应用这些史料在几何单元教学上，例如三角函数的正余弦定理，最后再以圆锥曲线的正焦弦为例，说明如何利用数学史料於此单元的教学，尤其是阿波罗尼斯的《锥线论》中对圆锥曲线的3个命题，将此3个命题的内容与意涵，尤其是正焦弦在圆锥曲线的几何意义上所扮演的角色，将其适当地融入教学中，将可使学生真正学习圆锥曲线的几何知识，而不再只是代数形式的几何知识。

Results Cosine ratio and correlation coefficient should be the first choice for similarity calculation based on chromatographic peak area.

结果在以色谱峰面积作为指标进行的相似度计算中，推荐采用夹角余弦和相关系数法。

Let's now examine the simplest wave from where the profile is a sine or cosine curve.

现在让我们来考察最简单的波形，它的剖面图是正弦或余弦曲线。

This is a painting sine and cosine curve curve contro...

这是一个画正弦曲线和余弦曲线控制图，请大家自己去运行一下，还比较好的。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了