Tag:data

  • IOS data storage

    Time:2022-5-5

    IOS data storage https://www.jianshu.com/p/19fdbf81a086 How to store data 1. Documents 3、NSUserDefaults 2. Database file 1. Sandbox 2、Plist 3. Nskeyedarchiver archiving / nskeyedunarchiver de archiving NSUserDefaults database 1、SQLite3 2、FMDB 3、Core Data file Sandbox The data stored in IOS localization is saved in a sandbox. Documents: iTunes will back up the directory. It is generally used to […]

  • DRF (VI) – parser

    Time:2022-5-5

    DRF (VI) – parser Problem elicitation:Request headers generally take many forms. The most common isjsonForm, andform-data。 JSON is the most common form. The parser is generally used to parse the data sent by the user; 1. Request header requirements # django:request.POST/ request.body # Content-Type: application/x-www-form-urlencoded #PS: if content type: application / x-www-form-urlencoded in the request […]

  • Python support vector regression SVR fitting, prediction of regression data and visual accuracy check examples

    Time:2022-5-5

    Original link:http://tecdat.cn/?p=24875  Support vector regression (SVR) is a kind of regression algorithm, which uses the similar technology of support vector machine (SVM) for regression analysis. As we know, regression data contain continuous real numbers. In order to fit this type of data, SVR model uses a method called ε Epsilon tube, ε Represents the width […]

  • Knowledge database

    Time:2022-5-5

    1、 Knowledge database 1.1 why learn database Job demand Big data Era Forced demand: save data Database is the core of all software systems DBA   1.2. What is a database database (DB,DataBase) Concept: data warehouse,Software, installed on the operating system (window, Linux, MAC, etc.) Above Function: store and manage data   DBMS (database management […]

  • Can you really use the index database?

    Time:2022-5-5

    The drawing is from freepik Reprinted from:Can you really use the index database? It’s also easy to use indexes. However, it’s one thing to be able to use indexes, and it’s another thing to have a deep understanding of the principles of indexes and be able to use indexes properly. 1、 Foreword Whether in an […]

  • Do you know how database indexing works?

    Time:2022-5-4

    Transferred from technology / translation boss – Mr. Li SONGFENGOriginal address:https://www.ituring.com.cn/article/986 Translator’s press: I accidentally searched this article (Q & A) in stackoverflow during translation today. I feel it necessary to translate it. Not only because the article itself is wonderful, but more importantly, it shows an important rule of writing articles (especially technical articles) […]

  • K-means clustering of advertising effect

    Time:2022-5-4

    Project background Explore classic data sets in depth. 1 data set review import matplotlib. Pyplot as plot # graphics library import numpy as np import pandas as pd from sklearn. metrics import silhouette_ Score # import contour coefficient index from sklearn. Cluster import kmeans # kmeans module from sklearn. Preprocessing import minmaxscaler, onehotencoder # data […]

  • IOS tableview is similar to Ctrip / meituan City screening, with customized sectionindex

    Time:2022-5-4

    Many apps need city selection. Recently, I wrote a city filtering and search function, as well as the double table linkage of tableview, which is automatically pulled up to the next category and the folding layout of tableview. Demo — Portal 1、 Double meter linkage 1. Pull up to the next category 1.gif Add footrefresh […]

  • Introduction to quantexa CDI syneo platform

    Time:2022-5-4

    Quantexa Big data service providers use entity analysis, relationship analysis and artificial intelligence technology to help customers process data and prevent financial crimes Enterprise overview It was established in 2016 and currently has 500 employees The service feature is scene decision intelligence (CDI) The landing scenarios are mainly anti money laundering, anti financial fraud monitoring, […]

  • Don’t say you can’t micro service. Six minutes will teach you to skillfully play with distributed link tracking!

    Time:2022-5-4

    I will introduce this article to you“Distributed Link Tracking”For most companies adopting microservice architecture, distributed link tracking is necessary, whether it is the traditional microservice system or the microservice architecture of the new generation of service mesh! The specific content introduced in this paper is not completely theoretical, but hopes to guide everyone to operate […]

  • Microservice – current limiting: I Implementation of token bucket algorithm by golang

    Time:2022-5-4

    At first, it was because we had to pull some third-party data, and the API interfaces of the third-party were limited flow measures. For example, 6000 / min, 500 / min. If you want to pull data, you can use multiple collaborative processes. But it is easy to overclock, so I want to write a […]

  • Hrsc2016 dataset is converted from XML format to Yolo format, with download link attached

    Time:2022-5-4

    Data set introduction Dataset background: Hrsc2016 dataset It contains 27 types of remote sensing objectsExtracted from Google EarthIssued by Northwest University of technology in 2016Oriented bounding boxes (OBB) annotation format is adopted Hrsc2016 (Liu et al., 2016) is the data collected by Northwest University of technology for ship detection, including 2976 ship instance information in […]