• Big data preprocessing methods, let’s see what you know


    Big data contains great value and has attracted great attention from all walks of life. There are many sources of big data. The data collected from the real world are generally incomplete and inconsistent dirty data, which cannot be directly mined and analyzed, or the results of analysis and mining are not satisfactory. In order […]

  • CS: app: lab1 – datalab super detailed


    Write in front Before the postgraduate entrance examination, the book of CSAPP had been brushed 5 or 6 times, so I had a good understanding of book knowledge. When I was learning C + + recently, I brushed the famous CSAPP experiment. 0. Environmental preparation It is best to prepare a pure Linux system. It […]

  • Test details of Python method — normalization (batchnorm2d)


    Test code: import torch import torch.nn as nn m = nn.BatchNorm2d (2, affinity = true) ා weight W and bias will be used input = torch.randn(1,2,3,4) output = m(input) Print (“input image:) print(input) Print (“normalized weight:) print(m.weight) Print (“normalized bias:) print(m.bias) Print (“normalized output:) print(output) Print (“output scale:) print(output.size()) # i = torch.randn(1,1,2) Print (“first […]

  • How to realize normalization based on Python


    This article mainly introduces how to realize normalization processing based on python. The example code is introduced in detail in this article, which has certain reference learning value for your study or work. You can refer to the following for friends who need it 1、 Definition There are two forms of normalization method, one is […]

  • The front end also needs to know a little about mongodb schema design


    Translated from mongodb official blog: 6 Rules of Thumb for MongoDB Schema Design: Part 1 6 Rules of Thumb for MongoDB Schema Design: Part 2 6 Rules of Thumb for MongoDB Schema Design: Part 3 Time is short and level is limited. There are inevitably omissions and deficiencies. Please correct them. “I have a lot […]

  • Study notes on react and Redux (5)


    Performance optimization of react Methods of performance optimization: Performance optimization of single react component; Performance optimization of multiple react components; Using reselect to improve the performance of data selection; The key point is to optimize the rendering performance of react component. 1. Performance optimization of a single react component React uses virtual DOM to improve […]

  • Idea setting backend code development specification


    1. Idea configuration SVN Submit SVN error: 1.1. Download: https://www.visualsvn.com/downloads/ 1.2. Modify the path that idea configuration points to: 2. Idea sets the tab key to 4 spaces Scheme selectionProject, uncheck belowUse tab character 3. Idea sets the encoding format to UTF-8 4. Idea sets line break to UNIX encoding format 5. Idea setting class […]

  • Some Thoughts on Interface Specification


    cause If there are different projects in a team, different people may have many inconsistencies in interface design. This leads to inefficient development.Because I met in my work, so I sort it out and say something about myself. How to Standardize Interfaces Because everyone has different understanding of their own language, different familiarity with HTTP […]