基于循环统计理论, 对循环平稳信号进行处理, 主要研究了信号的二阶循环统计特性, 即循环自相关函数和循环谱密度, 指出循环自相关函数不为零的循环频率对应着信号中的某些故障, 并
可以对调幅信号进行解调. 通过循环频率扫描方法提取的调制源分布在循环频率域的低频段, 其结
果可用循环频率-频率- 循环谱密度的三维图表示. 用仿真信号对该方法进行验证, 并应用于滚动轴承的内、外圈及滚动体的故障诊断, 可以有效地分离出所对应的故障特征频率.
Statistical theory based on the cycle of cyclostationary signal processing, mainly studied the statistical properties of the signal of second cycle, ie cyclic autocorrelation function and cyclic spectral density, noting that cyclic autocorrelation function is not zero cycle frequency corresponds to a certain signal These faults, and can be demodulated AM signal through cyclic frequency scanning method to extract the modulation source distributed in the frequency domain of the low frequency cycle, the results can be cyclic frequency- Frequency- loop spectral density of the three-dimensional graph. using simulated signals right This method is validated and used rolling bearing, the outer ring and rolling fault diagnosis can be effectively isolated from the corresponding fault characteristic frequency. (2013-08-15, PDF, 166KB, 下载60次)
实施GRABCUT源代码
由贾斯汀塔尔博特jtalbot@stanford.edu 。
放置在公共领域， 2010年
代码最后更新：2006年
弗拉基米尔·洛夫（ vnk@cs.cornell.edu ） ， 2001年使用GRAPHCUT实施。
要求： OpenGL的， GLUT和OpenCV的库来编译和运行。
用法： grabcut.exe <ppm文件名
使用鼠标拖动矩形围绕前景部分显示的图像。
然后使用下面的按键
1 ：显示图像
2 ：显示GMM组件分配。红色的色调是前景元件 绿色背景组件。
3 ：显示N-链接的权重。白色是一个大型的平均N -链接周围的像素重量，黑色是较低的平均N-链路重量。
4 ：显示T -链接的权重。红色部分是前景T-链路重量，绿色分量为背景的T链接权重。
“” （空格键） ：显示/隐藏计算alpha遮罩。
O ：运行一步GRABCUT细化算法
R ：运行GRABCUT细化算法收敛。
L ：再次运行果园布曼聚类算法。 （在初始化过程中自动运行）。
逃生：停止细化算法（后按 R ）
Q 退出。
GrabCut implementation source code
by Justin Talbot, jtalbot@stanford.edu
Placed in the Public Domain, 2010
Code last updated, 2006
Uses Graphcut implementation by Vladimir Kolmogorov (vnk@cs.cornell.edu), 2001.
Requires: OpenGL, GLUT, and OpenCV libraries to compile and run.
Usage: grabcut.exe <ppm filename>
Use mouse to drag a rectangle around the foreground portion of the displayed image.
Then use the following keys
1 : Show image
2 : Show GMM component assignment. Red shades are foreground components green are background components.
3 : Show N-link weights. White is a large average N-link weight around a pixel, black is a low average N-link weight.
4 : Show T-link weights. Red component is foreground T-link weight, green component is background T-link weight.
(space bar): Show/hide the computed alpha mask.
o : Run one step of the GrabCut refinement algorithm
r : Run the GrabCut refinement algorithm to convergence.
l : Run the Orchard- (2013-04-21, Visual C++, 35KB, 下载47次)
纹理映射简单的讲，就是把一个纹理(其实说白了，纹理可以理解为一幅图像)映射到空间物体的表面上，因此纹理映射也叫贴图，这个表明不一定是矩形，比如说我可以是球面，或者是任意曲面。在上一篇文章OpenGL_Qt学习笔记之_04(3D图形的绘制和旋转)中，我们绘制的空间体的表面都是一些光滑的颜色，如果要在其表面采用那种方法绘制图像的话，则必须利用微分的思想，一个一个的绘制小图像，然后拼接起来，可想而知，这个过程是多么的复杂，opengl的纹理映射就可以很好的解决这一问题。
这个实验室在上一篇博文OpenGL_Qt学习笔记之_04(3D图形的绘制和旋转) 绘制的立方体上贴每个面上贴上一张纹理(即图片)。
Simple texture mapping, a texture (in fact, white, and texture can be understood as an image) is mapped to the surface of the space objects, texture mapping, also known as maps, this show that is not necessarily a rectangle, for example, I can spherical, or any surface. In the previous article OpenGL_Qt study notes _04 (3D graphics rendering and rotation), the space we draw the body surface are smooth color, if you want to kind of method to draw the image on its surface, you must the idea of using the differential, a draw small image, then stitching together, we can imagine how complex this process is opengl texture mapping can be a good solution to this problem. This laboratory cube drawn on the blog post OpenGL_Qt study notes _04 (3D graphics rendering and rotation) posted each the surface paste a texture (picture). (2012-08-24, C/C++, 382KB, 下载271次)