leapfrog learning computer

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Computer Learning Practice (iii) KNN Handwriting Recognition System

Objective: To identify numbers 0-9 Using KNN Material: 32*32 digital square arrays (saved as text files) #-*-Coding: UTF-8-*-from numpy import * def img2vector (filename): # generate a 1*1024 array (zeros is a numpy function, as for the differences between array and list, we will not introduce them here.) returnvect = zeros () # use the open function to open a text file Fr = open (filename) # cyclically read the file content for I in range (32): # Read a row and return the string linestr = Fr.

Computer Graphics learning notes

When creating a window drawing in it, you must also specify the coordinate system to be used and how to map the prepared coordinates to pixels (x * Y) on the physical screen ). The window is measured physically by the number of records. Before painting, you must specify "how to convert a specified coordinate pair to screen coordinates, specify the trim area first (specify the area occupied by the window in the Cartesian coordinate system ). 1. in two-dimensional space, the trim area is the

DNS Understanding-Re-learning computer networks

. GOOGLE. COM. GitHub.com mail is handled by 1 Aspmx.com.$ host Facebook.github.comfacebook.github.com is an alias for github.fastly.net . Github.map.fastly .net has address 103.245 222.133 hostCommands can also be used for reverse queries, that is, querying a domain name from an IP address, equivalent to dig -x . 192.30.252.153153.252.30.192.in-addr.arpa domain name pointer pages.github.com. (2) nslookup commandnslookupCommands are used to interactively query a doma

Computer Learning (5): Network Addressing (not finished)

source host uses the destination host's IP address to query the destination host's physical address.The Physical address is encapsulated in the frame header of the datagram. The typical physical address is the MAC address in Ethernet. MAC address in two places makesUse: The network card in the host is sent to itself by the destination MAC address in the header, and the switch in the network makesUse the destination MAC address in the header to determine which port the datagram is forwarded to.

De STM32 single-chip computer learning (a)--download environment construction

One, download driver installation, 1, manually open the CH341 folder (within the driver folder), double-click the installation driver2, Nemo m3s development hardware settingsThe hardware needs to do the following 2 points:1, USB plug USB1 (COM), turn on the power switch J14 (blue and white switch), and install the driver2, boot boot jump cap insertion position, BOOT1 set 0,boot0 settings 0,j15 position, positive look, jumping caps are inserted in the lower end.3. Use FLYMCU to download(1) First

The Python learning path implements simple computer functions.

for the + all numbers to find out [ -3,34,3.2345] equivalent to + do the delimiter #We just need to add all the elements in it.ret = Re.finditer ('-?\d+\.? \d*', expression) sum=0 forIinchRet:sum+=Float (i.group ())returnstr (SUM)#3, first remove all the parentheses in the calculation of its resultsdefremove_bracket (expression): whileTrue:#Get rid of all the parentheses first.Express_a_bracket = Re.search ('\([^()]+\)', expression)ifExpress_a_bracket:#handle this expression with onl

Angular Learning Mac Computer

1 Angular programming Software: Webstorm2 Angular Environment Construction Nodejs, Angular cli,webstormNodejs Npm-v can see the version of Nodejs after installation is completesudo npm install-g @angular/cli (Install angular command line tool)Ng-v (view angular command-line tool version)3 Angular Project Document interpretationAngular-cli.json command-line tool configuration file, referring to a third-party package (Boostrap,jquery) to modify this fileThird-party dependency packages for Package.

Recommended books-Promotion of classical teaching materials in university computer course learning route 2

A few days ago, I sent three blog posts to introduce students to the university's computer course learning route. Currently, the number of visits has exceeded 6000. The following links are provided: University Computer Course Study Route 1: http://student.csdn.net/space.php? Uid = 113322 Do = Blog id = 15401 University Comp

Some experiences about learning computer (II.)

10 ACM questions, and then write a demining program. I remember it took me one weeks to finish the minesweeper, and before that I would not be able to mine the game, and Liu Shi told us that he had spent the whole afternoon writing, but I was also very fulfilling. Junior school, because the class 10 OS to sophomore next semester, or Miss Li class, but the experimental class lacks a teaching assistant, so Miss Li found me. I do two Linux machines in the comp

The importance of top-level conferences in the field of computer vision and machine learning

Recently asked to pay attention to the visual attention of the "hot Research direction", "the latest method" and so on. Boss suggests Cnki, EI, or sci journals. I'm a little puzzled, why not go to the papers at the top conference?In the field of machine learning, computer vision and artificial intelligence, top-level conferences are the way to feel. Some people will question that these meetings are only EI,

Advanced Computer Learning Materials

JavaScript and Ajax collection-level learning materials download categories Download and summary of the most popular php development tools, e-books, video tutorials, and other materials UML learning electronic resource download summary software design and development staff essential Classic cbcbt video tutorial series Linux quick learning video tutorial Tian

The first day of Python Learning: Computer Fundamentals

operator: A component that implements arithmetic and logic operations.Memory: A memory component that a computer uses to store all data and programs. Its basic function is to store (write) or fetch (read) the information at the specified address.Input device: Is the device that enters information into the computer. External memory is also an input device.Output device: Mainly display, printer and plotter.

Python learning--day1. Computer Basics

Python learning-day1. Computer BasicsFirst, the hardware components of the computer system:Big three of the computer: memory, hard disk, CPUSecond, the role of programming language and the relationship between operating system and hardware:A: 1, the role of programming language is to communicate with the

My Reading list-machine Learning && Computer Vision

://mmlab.ie.cuhk.edu.hk/projects/srcnn.htmlCode:http://mmlab.ie.cuhk.edu.hk/projects/srcnn.htmlpeople(1) Ross B. girshick-the Author of Rcnn, FAST-RCNNwebsite:http://www.cs.berkeley.edu/~rbg/#girshick2014rcnnGithub:https://github.com/rbgirshick(2) shaoqing ren-the Author of FASTER-RCNN, spp-netwebsite:http://home.ustc.edu.cn/~sqren/Github:https://github.com/shaoqingren(3) Georg nebehay-the Author of CMTWebsite:http://www.gnebehay.comGithub:https://github.com/gnebehay(4) Jianchao yang-the Author

Original: Multidimensional learning method of computer

first, Doviz 360 degree study method:Vertical: (Old code): Turing---machine code---Assembly---intermediate language---Managed assembly (virtual machine, intermediate platform, etc.)----high-level languageComputer architecture + memory Management + underlying mechanism ( memory mode, object Model ) + Programming Paradigm + Quality management (security, optimization, anomalies, traps, etc.)understand the structure and principles of the computer (underst

Start my university's four-year computer learning journey

Today, I am only a freshman in the second normal school. I think a lot during this school year, looking for my future direction, and my major reports automation, I had access to computer programming (that is, using C to write some simple driver single-chip microcomputer programs), and I was very interested in computer programming. Throughout the year, I found some places where excellent people gathered (suc

Build a server on your computer and publish your own website (for learning) involving peanut shells

the truth can be, just learning test, so we use 8080 port.2,In the previous step we only achieved their own access, but how to let the outside network of students access, here may involve a simple network knowledge, I am not very good network learning. That's a little more popular. There are two situations (1) You do not use the Internet route, the operator to give you a separate IP address, then you can d

Python Getting Started learning day 01 Computer Basics

control the hardwareThe operating system is located between the computer hardware and the application, which is used to coordinate, manage and control computer hardware resources and software resources.The operating system is subdivided into two main functions:1, the complex hardware operations packaged into a simple function to provide users/applications to use2, the competition of the hardware of multipl

is Python fading? Why do computer-learning partners say that Java and C + + are now benevolent?

Learning 3, OPENCV: Computer vision 4. NumPy: linear algebra and numerical calculation 5. SCIPY: Signal Processing 6. Cuda:nvidia GPU-Based computing acceleration 7. OPENCL: Compute acceleration for other GPU vendors Well, limited to the scope of my knowledge, there should be many and I do not know. Remember that 2006 years when a friend of biology mentioned a library of bioinformatics in Python. Know a v

Mac Computer Learning notes-

Bought a new Mac Mini, the first time with a Mac, a bit of Linux Foundation, take this opportunity to record their learning process.1. Personal settings file. ProfileExport ls_options= '--color=auto ' # if not specified, the color is automatically selected export clicolor= ' Yes ' #是否输出颜色export lscolors= ' Exfxcxdxbxegedabagacad ' #指定颜色alias ll= ' ls-l 'Effect: 1. Set the terminal to color, 2. Set Shortcut commands2.iterm2 is OS X next open source fre

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