finite_difference

计算信号检测时的ROC曲线,计算结果比较准确，完全符合要求。(Computed the ROC curves.)

this code is mainly based on clustering

輸入兩個由TF, ZPK, SS 或 FRD建立的system function後，程式會自動計算在riemann plot上的Chordal distance值。(function delta=chordal(G1,G2) This is the Chordal distance calculation tool on riemann plot. )

把三角函数的和 按周期的不同 把需要的周期函数 抽出来 相当于滤波器的作用(The trigonometric functions and the need to press the different cycles of periodic functions to extract the equivalent filter function)

声音过滤器工具大集合.(Voice filter large collection of tools.)

这是gsm系统中维特比的译码matlab仿真程序，上传给大家学习和参考。(This is the gsm system, Viterbi decoding matlab simulation program, upload for everyone to study and reference.)

Calcul of entropie s image

k-means 算法接受输入量 k ；然后将n个数据对象划分为 k个聚类以便使得所获得的聚类满足：同一聚类中的对象相似度较高；而不同聚类中的对象相似度较小。聚类相似度是利用各聚类中对象的均值所获得一个“中心对象”（引力中心）来进行计算的。(k-means algorithm accepts input k then n data objects into k clusters in order to make clustering satisfy obtained: the objects in the same cluster high similarity different clustering object similarity small. Cluster similarity is the use of the mean of each cluster of objects that get a " central object" (center of gravity) to perform the calculation.)

精通matlab编程语法， 熟练掌握matlab的用法，等(Proficient in matlab programming syntax, mastering matlab usage, etc.)

Local Standard Deviation Max used for Image enhancement