lognormal

在共梯度法中 只有当初值的选取靠近最优解时 迭代才会收敛 当远离时发散 且 当精度控制为0.1时可以实现 但设为0.01时就实现不了(numeberica method)

帮助分割图像的程序 能从目标图像中取出对象 This program segments and extracts objects from an image.(help the image segmentation process images from the target object Retrieve This program segme nts and extracts objects from an image.)

matlab实现功率谱密度分析psd及详细解说(Matlab PSD power spectral density analysis and detailed explanation )

dijkstar经典算法，用于寻求最短路径规划等(dijkstar classical algorithm for seeking the shortest path planning)

为了对数据进行准确的预测，建立了双隐层BP神经网络，并提供了源数据，实现了准确的数据预测。程序能够执行，误差较小，输出接近真实值。(To accurately forecast the data, we build the two-hidden layer BP neural network and provide the original data, which will forecast the data. The program can be executed with small error which will be close to the real data.)

fft，本代码主要介绍fft的主要步骤，非常简单有很明了，非常适合阅读 (FFT, the code describes the main steps of FFT are very clear, very simple, very suitable for reading)

批量地对图像进行自由剪裁 以达到想要的大小 并能批量输出( batch crop the image freely and batch output)

PdfParse 用于从PDF文件中抽取文本数据的示例，支持unicode字符集编码、8进制和16进制编码。(PdfParse used to extract text from a PDF file example of data, unicode character set encoding, octal and hexadecimal encoding.)

电磁学代码，matlab编写绝对自己创作的(Electromagnetics code, matlab absolutely prepared their own creation)

说明：  讲音乐处理以后的音乐 ,这个是合成后的完美音乐(stresses music after handling the music, this is the perfect synthesis of music)