mathematics for machine technology

two dimensional convolution calculation of Laplace operator and linear sharpening filter #-*-Coding:utf-8-*- #线性锐化滤波-Laplace operator for two dimensional convolution calculation #code:[email protected]import cv2import numpy as Npfrom scipy import sig Nalfn= "test6.jpg" Myimg=cv2.imread (FN) Img=cv2.cvtcolor (myimg,cv2. Color_bgr2gray) Srcimg=np.array (img,np.double) Myh=np.array ([[0,1,0],[1,-4,1],[0,1,0]]) myj=signal.convolve2d ( Srcimg,myh,mode= "Same") jgimg=img-myjcv2.imshow (' src ', img)

(such as GBDT) are typical of the method, today mainly talk about the gradient boosting method (this is a little different from the traditional boosting) some mathematical basis, With this mathematical basis, the application above can be seen Freidman gradient boosting machine.This article requires the reader to learn basic college mathematics, as well as the basic machine learning concepts of classificati

myhaspl 18 September 16:21. PKIDrwxrwxr-x. Root root 4096 September 16:25 pypy-2.3.1-srcbash-4.2$This blog all content is original, if reproduced please indicate sourcehttp://blog.csdn.net/myhaspl/Multiple commands can be written on the same line, used once, separated by semicolonsbash-4.2$ Ls-la; CD Numpy;lsTotal dosage 150484DRWX------. 6 MYHASPL myhaspl 4096 September 10 16:55.Drwxr-xr-x. 3 root root 20 September 10 08:23..-RW-------. 1 MYHASPL MYHASPL 220 September 17:59 bash_historyDrwxr-x

Mathematics in machine learning feel useful, welcome to discuss Mutual learning ~follow Me Original article, if you want to reprint please keep the sourceThis blog for the July online Shambo teacher Machine Learning Math Course study notes Moment For the random variable x,x, the K-Order Origin moment is \[e (x^{k}) \] The K-Order center

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-method, but there is another problem: If the numerator and denominator can all get any value, then there will be an infinite solution, we will limit the denominator to 1 (this is a very important technique using the Laplace multiplier method. It will also be used in the PCA mentioned below. If you forget it, please review the high number) and use it as the restriction condition of the Laplace multiplier method: This formula is a problem of feature value calculation. For n (n> 2) classifi

prior distribution and the posterior distribution are conjugate relations).Instance OneAssume a random variable x~bernoulli (θ), 0Because the value of θ is between (0,1), it is natural to think that the beta distribution is defined in that interval, so give Theta a Beta distribution as a priori, Θ~beta (β).Post-Test distributionThis is also a beta distribution.Example TwoAssuming a random variable x~n (0,λ), here we set the variance σ^2 to λ, where λ>0.(1) We assume that λ satisfies the gamma d

posterior distribution has the same form, simplifying the calculation.The following is a graph of the Dirichlet distributions of three variables, where the left figure {αk}=0.1, middle diagram {αk}=1, right {αk}=10:Maximum posteriori estimatereprint Please indicate the author Jason Ding and its provenanceGitHub home page (http://jasonding1354.github.io/)CSDN Blog (http://blog.csdn.net/jasonding1354)Jane Book homepage (http://www.jianshu.com/users/2bd9b48f6ea8/latest_articles)"

Path to mathematics-python computing practice (16)-machine vision-filter noise reduction (neighborhood average method filtering)-python practice #-*-Coding: UTF-8-*-# code: myhaspl@myhaspl.com # neighborhood filtering with a radius of 2 import cv2import numpy as npfn = "test3.jpg" myimg = cv2.imread (fn) img = cv2.cvtColor (myimg, cv2.COLOR _ BGR2GRAY) # Add salt and pepper noise param = 20 # grayscale ran

Web pages is also occupied by those posts that do not have much nutrition. I sincerely hope that the atmosphere in China will be more intense. Game Players really like to make games, and Data Mining players really like to dig Data, not just for mixed meals, in this way, it makes sense to talk more than other people. In Chinese articles, there are too few things about technology in a down-to-earth manner. To change this situation, start with me. As me

, \ beta_s $. then $ \ bee \ label {313_7_eq} \ SCRA \ beta_1, \ cdots, \ SCRA \ beta_r \ mbox {linear independence, and it is a group of bases of} \ SCRA w \ mbox }. \ EEE $ \ Bex \ dim W = S + T = \ dim W_0 + \ dim \ SCRA v. \ EEx $ forward certificate \ eqref {313_7_eq }. on the one hand, $ \ beex \ Bea \ quad \ sum _ {I = 1} ^ t K_ I \ SCRA \ beta_ I = 0 \ \ Ra \ SCRA \ sex {\ sum _{ I = 1} ^ t K_ I \ beta_ I} = 0 \ \ Ra \ sum _ {I = 1} ^ t K_ I \ beta_ I \ In w \ cap \ SCRA ^ {- 1} (0) =

from the cursor forwardFx,tx,fx,txFind characters in current lineFind Replacement Examples::S/search/replace:S/if/sinceReplace the next "If" with "Since":%s/if/sinceReplace All "If" with "Since"Word boundaries:Specify word boundaries:\And\>Such as:/\Match toDStart with an arbitrary lowercase letter in the middle toAnEnd ofWords/\$[0-9]*\. [0-9] [0-9]Match Lookup$XX ... x.xxThat's the number, and there's only two little bits.Number ofCommon editing commands:AIAfter the cursor is inserted,Insert

A typical application running environment includes the operating system, user function library, file system, and environment settings. If a running environment contains all these key components, the application itself cannot distinguish whether it is running in a physical system or a virtual system. The main idea of the virtualization technology at the operating system layer lies in this: dynamically copying the software runtime environment on the hos

In recent years, virtual machine technology has gradually become a hot topic and is receiving more and more attention. For example, VMWare has been adopted by more than 80% of the world's top enterprises. With years of research, virtual machine technology has been widely used in enterprise computing, disaster recovery,

The first part goes into the Java1.java technology systemSun's officially defined Java technology System includes several components: Java Program Set Language Java virtual machines on a variety of hardware platforms class file format Java API Class Library Third-party Java class libraries JDK is the smallest environment to support Java program Development, Java programming lan

title Recognition and window inner text recognition can be said to be an industry puzzle because the RDP entire display has no characters and is completely plotted through GDI functions, so even if the RDP Stream, and can not get any text from the stream , because all the GDI functions plotted graphics, Kirin open source Fortress rdp/x11/vnc window identification development cycle of about 4 months, it is now possible to identify the window title and the internal operating text. in addition, RD

Preface The migration technology of virtual machines provides a simple method for server virtualization. Currently, popular virtualization products VMWare, xen, hyper-V, and KVM all provide their own migration tools. Among them, the Linux platform's open-source virtualization tool KVM has developed rapidly, and the migration features of KVM-based virtual machines have become increasingly improved. This article describes both static migration (offline

Virtual Machine-Based Software Protection TechnologyGuideVirtual Machine-based software protection technology is not sure whether it is first proposed by vmprotect, but vmprotect is undoubtedly to promote this technology to people. Nowadays, virtual machine-based software pr

Preface System migration refers to moving the operating system and applications on the source host to the target host and running properly on the target host. In the era when there is no virtual machine, the migration between physical machines relies on system backup and recovery technologies. Back up the operating system and application status on the source host in real time, connect the storage media to the target host, and restore the system on the