• Simplified regularization of machine learning: lambda


    The model developer adjusts the overall impact of regularization by multiplying the value of the regularization term by the namelambda(also known asRegularization rate)Scalar of. That is, the model developer will perform the following operations: minimize (Loss(Data|Model) + \lambda complexity(Model)) Execute L_ 2 regularization has the following effects on the model Yes, the weight value is […]

  • Database | query optimization (1)


    overview Since SQL is a declarative language, users only tell the DBMS what they want to get, but do not indicate how to calculate. Therefore, DBMS needs to convert SQL statements into executable query plans. However, there can be multiple query schemes for the same data, and the performance gap is very large. The task […]

  • Stand alone deployment of Prometheus


    1、 What is Prometheus PrometheusIt was originally inSoundCloudOpen source system monitoring and alert toolkit built on. Is a time series database.time series data : i.e. in the same sequence(Same name and label), a continuous collection of data stored in a time dimension.be careful:staySame indicator nameAdding, deleting and modifying tags on will produce a new time […]

  • Learn data visualization from CSS


    A picture is worth a thousand words The field of visualization is one of the hottest branches in the (Pan) front-end. Data visualization technology is heavily used in projects such as visual large screen display of data information for ordinary users, data statistics overview or dispatching services in enterprise services, and smart construction (smart brain, […]

  • Ecarts histogram assembly package 2


    Ecarts histogram assembly package 2 1. Development environment Vue + echarts2. Computer system Windows 10 professional edition3. In the process of developing with Vue + ecarts, we often draw histogram. The following is my encapsulation of ecarts histogram components. I hope it will be helpful to you.4. Add the following code to the template: <template> […]

  • Echart sets the spacing between columns


    Echart sets the spacing between columns 1. Development environment Vue + echarts2. Computer system Windows 10 professional edition3. In the development process of using Vue + eckarts, we always use the histogram. Let me share how to modify the spacing between columns in the histogram, hoping to be helpful to you.4. For official cases, the […]

  • Bayesian quantile regression, lasso and adaptive lasso Bayesian quantile regression analysis are implemented in R language


    Original link:http://tecdat.cn/?p=22702 abstract Bayesian regression quantile has attracted extensive attention in recent literature. This paper realizes Bayesian coefficient estimation and variable selection in regression quantile (RQ), Bayesian with lasso and adaptive lasso penalty. It also includes the further modeling functions of summarizing the results, drawing the path map, a posteriori histogram, autocorrelation map and drawing […]

  • Oracle statistics


    –Collect statistics by partition exec dbms_stats.gather_table_stats(‘&USERNAME’,’&PARTITION_TABLE’,’&PART_NAME’,estimate_percent =>DBMS_STATS.AUTO_SAMPLE_SIZE,method_opt=>’FOR ALL COLUMNS SIZE 1′,cascade=>TRUE,GRANULARITY =>’PARTITION’,NO_INVALIDATE=>false,degree=>4); –Specify the table to collect statistics EXEC DBMS_STATS.GATHER_TABLE_STATS(‘&USERNAME’,’&TABLE_NAME’,estimate_percent =>DBMS_STATS.AUTO_SAMPLE_SIZE,method_opt=>’FOR ALL COLUMNS SIZE 1′,NO_INVALIDATE=>false,cascade=>TRUE,degree=>4); EXEC DBMS_STATS.GATHER_TABLE_STATS(‘IMES_X_DG’,’FOX_MODULE_DATA’,estimate_percent =>DBMS_STATS.AUTO_SAMPLE_SIZE,method_opt=>’FOR ALL COLUMNS SIZE 1′,NO_INVALIDATE=>false,cascade=>TRUE,degree=>1); –Auto mode EXEC DBMS_STATS.GATHER_TABLE_STATS(‘GALILEO’,’WIP_PN_INPUT_TRACKING’,estimate_percent =>DBMS_STATS.AUTO_SAMPLE_SIZE,method_opt=>’for columns WO_NO size auto’,NO_INVALIDATE=>false,cascade=>TRUE,degree=>2); EXEC DBMS_STATS.GATHER_TABLE_STATS(‘VERA’,’WIP_WO_PICK_LIST’,estimate_percent =>DBMS_STATS.AUTO_SAMPLE_SIZE,method_opt=>’for columns WO_NO size auto’,NO_INVALIDATE=>false,cascade=>TRUE,degree=>2); –Specify the index to collect statistics exec […]

  • Component based web app


    Component based web app Project source: muke.comShow effect linkProject source code 1 Analysis 1.1 app introduction The component-based web app implements an exquisite H5 dynamic mobile end single page data report. In addition to the initial preloaded page displaying progress, it is composed of ten pages. Each page is a component. In addition to the […]

  • HTML5 generate bar chart (bar chart) effect instance code


    XML/HTML CodeCopy content to clipboard <html>     <canvas id=“a_canvas” width=“1000” height=“700”></canvas>     <script>         (function (){                   window.addEventListener(“load”, function(){                     var data = [1000,1300,2000,3000,2000,2000,1000,1500,2000,5000,1000,1000];               var xinforma=  [‘ January ‘,’ February ‘,’ March ‘,’ April ‘,’ may ‘,’ June ‘,’ July ‘,’ August ‘,’ September ‘,’ October ‘,’ November ‘,’ December ‘];       //   Get context           var a_canvas = document.getElementById(‘a_canvas’);     […]

  • Springboot dynamically loads the histogram of ecarts


    In this paper, we share the specific code of springboot dynamic loading ecarts histogram for your reference. The specific content is as follows The first time to write a blog, no more nonsense, directly on the code Background code @RequestMapping(“/rcbchart”) @ResponseBody private String dwcb(@RequestParam(“scrq1”) String scrq1,@RequestParam(“scrq2”) String scrq2, @RequestParam(“dwmc”) String dwmc) throws ParseException { List […]

  • Python meituan crawler – grabbing business data of food plate


    Main ideas Objective: To investigate the mechanism of the disease According to the input city name, crawl the data of all businesses in meituan food section of the city. The data include: Store name, rating, number of comments, average price, address, These data are stored in Excel. Finally, try to do a simple analysis of […]