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Hello, everyone. All the following are my notes when I study teacher Han Ru's tutorial. Some contents have been deleted and modified. It is recommended that you read the original author's documents for learning. This article is only used as personal learning notes, and will be continuously modified on this basis in the future. When learning Go ...

Chapter 12 Linux startup and kernel management Content overview Startup process for versions prior to CentOS 6Service managementGrub managementStart troubleshootingKernel managementLaunch process of CentOS version 7 and laterUnit introductionService management and viewingStart troubleshootingCrack root passwordRepair Grub2 1.CentOS 6 startup ...

1. Priority queue 1.1 concept Queue is a first in first out data structure, but in some cases, the data operated may have priority. Generally, when leaving the queue, elements with high priority may be required to leave the queue. In this scenario, it is obviously inappropriate to use the queue. For example, when playing games on the mobi ...

preface stay Flink of big data (Part I) In this paper, we introduce the characteristics, architecture, two-stage submission and data flow of Flink. This paper introduces the unique operator of Flink and the case of implementing WordCount with Flink 1, split and select operators The split operator splits a DataStream into two or more ...

2021SC@SDUSC preface This analysis measures.py file is used to calculate evaluation indicators, including mAP, confusion matrix and IOU related functions. fitness function def fitness(x): # Model fitness as a weighted combination of metrics w = [0.0, 0.0, 0.1, 0.9] # weights for [P, R, mAP@0.5, mAP@0.5:0.95] return (x[:, :4] * ...

Before I started, I had been trying to find a popular and intuitive example to introduce object-oriented. Look around and find that everything can be object-oriented and nothing is object-oriented. Later, I found that the way human beings understand society is more object-oriented. "Birds of a feather flock together and people flock togeth ...

1.mongodb official website MongoDB: the application data platform | MongoDB 2. Go to the official website of MongoDB and download MongoDB, MongoDB compass and Mongodb--database--tools 3. The operation of the MongoDB database by nodejs needs to rely on the third-party package mongoose of nodejs   Terminal instruction: npm install mongoo ...

Development server //Configure development server devServer: { static: { //True meaning: configure the directory of additional static files, which is equivalent to the open static resource directory of express, which can be accessed from the browser http://localhost:8080/xx.jpg //I came to find it in the static file. ...

MySQL foundation FAQ collection General rules for setting primary keys in sql? Do not update the value of the primary key column (the column to set the primary key cannot be updated) Do not reuse the value of the primary key column (the primary key value must be unique in the whole primary key column) Do not use the value that may change i ...

Recently, I have been writing a personal music online playing platform with django. In terms of web page data protection, I have taken many anti crawler measures, so in this article, I analyze the anti crawler and its corresponding cracking skills from the source code and practical operation.First of all, we declare that there is no difference ...