cosine integral是什么意思

网络释义

用法例句

Studied the Hilbert transformation of Cosin intergal function Ci(x) and Sine intergal function Si(x).

讨论了余弦积分函数Ci(x)与正弦积分函数Si(x)的Hilbert变换,证明了Ci(x)与-sgn(x)Si(|x|)构成Hilbert变换对,即Ci(x)-isgn(x)Si(|x|)为解析信号,同时求出了Si(x)的Hilbert变换,证明了Si(x)与Ci(x)-Ci(0)构成Hilbert对。

The theoretical solution of eigenfrequencies and vibration models of rectangular thin plate on foundation with completely free boundary was derived by the double finite cosine integral transform method.

将弹性地基以W ink ler模型模拟,利用双重有限余弦积分变换的方法推导出了弹性地基上四边自由矩形薄板的固有频率和振型的解析解表达式。

Free vibration analysis of a thin plate with completely supported by finite cosine integral transform method;

利用双重有限余弦积分变换的方法推导出了四边固定支承条件下,矩形薄板的固有频率和振型的解析解表达式。

Cosine Regression Purifying Method to Determine Positions of Least Square Centers in Different Cross Sections;

截面最小二乘圆心位置的余弦回归提取法

The Inequlity for the weighted sum of cosine of interior angles in a convex n polygon.;

凸n边形内角加权余弦和不等式

In this paper, a instantaneous first-harmonic current detecting method based on cosine FIR filter is introduced .

　文章提出了一种基于有限长余弦型单位脉冲响应滤波器的实时基波电流检测方法。

Direction cosine analysis based on winmeil;

基于Winmeil测量软件的方向余弦研究

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。

In this paper, a simple calculating method to establishthe interconversion between Eulerian angles and direction cosine by Spherical Trigonometry is presented.

为了从多个角度使用不同的手段研究旋转变换问题,本文提供了一种非常直观、简捷的计算方法,即利用“球面三角”的方法建立了用欧拉角与用方向余弦描述三维图形旋转变换的转换关系。