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基于BP神经网络对带有噪声的二阶系统的辨识预测,采用典型的三层网络拓扑结构即输入层、隐含层和输出层,利用最小均方误差和梯度下降法,通过误差的反向传播来不断调整系统的权值阈值,使网络输出不断地逼近实际系统的输出,仿真结果表明BP网络达到了预期辨识的精度效果,实现了非线性系统的辨识预测.

Dispersion in an optical fiber

《虚拟现实三维立体网络程序设计语言VRML――第二代网络程序设计语言》配书光盘-"virtual reality 3D network programming language VRML-- second-generation network programming language" CD Distribution

对于一些图像来说，常用的边缘检测算法有时候无法设立合适的阈值将它们的梯度较小的模糊边缘检测出来。为了解决这个问题，有两种解决方法：将图像方差标准化，拉大模糊边缘的梯度值，或通过设置sigmoid函数，将像素所在区域的信息传递到梯度值中去，对其进行调整，就能找到合适阈值，有效地将模糊边缘提取出来。本程序把这两种算法实现并与与传统算法进行了比较。-For some images, the commonly used edge detection algorithm sometimes can not be an appropriate threshold for the gradient of their smaller fuzzy edge detected. To solve this problem, there are two solutions: the image variance standardization, widening the fuzzy edge of the gradient value, or by setting the sigmoid function pixel region to disseminate the message to the gradient values to adjust, on the can find a suitable threshold, effectively extracted fuzzy edge. This procedure of these two algorithms with the traditional algorithm.

用MATLAB处理图像，通过hough变换检测直线，并且可以直接画出直线。-Image processing using MATLAB, through the detection of a straight line hough transform, and can draw a straight line.

采用原始算法实现dib位图的读取.-using original algorithm Freehand bitmap read.

图形学的一个演示，窗口视区变换，即世界坐标系到界面坐标系的转换，MFC实现-A presentation graphics, window area, as the transformation that the world coordinate system to the interface coordinate system conversion, MFC to achieve

光线跟踪程序的vc实现。可以绘制简单的三维图形，有阴影效果-The ray track program that achieved by VC,it can plot sipmle 3D graph with shadow effect

在图形模式下显示3D图形绕任意轴旋转的程序。 -in graphic mode display 3D graphics rotating procedures.

利用rectangle函数制作多个不同大小的矩形，利用ellipse函数制作多个大小不同的椭圆中，形成一个具有透视效果的图形。- Manufactures many different sizes using the rectangle function the rectangle, manufactures in the many sizes different ellipse using the ellipse function, forms to have the perspective effect the graph.