Tag: ipa

uniapp uses uview components to realize three-level linkage between provinces and municipalities (any three-level linkage)

<template> <view class=”invite”> <u-cell title=”Click to select” isLink :value=”value” @click=”change()”></u-cell> <u-picker :show=”show” ref=”uPicker” :columns=”columns” @confirm=”confirm” @cancel=”show=false” @change=”changeHandler” ></u-picker> </view> </template> <script> // import {<!– –> address } from ‘@/static/address.js’; export default {<!– –> data() {<!– –> return {<!– –> show: false, columns: [], origiData: [{<!– –> “code”: “110000”, “value”: “Beijing City”, “children”: [{<!– –> “code”: […]

Principal component analysis PCA is PC1 or PC1 + PC2

I saw that PCA=∑ (PC1 + PC2) is used in the literature, and there are also values describing the PCA score. How should the PCA score be calculated? . . . . . . A review of the steps for PCA: 1. Determine the number of principal components 2. Extract principal components 3. Principal component […]

Alipay URL Scheme is the most complete in the entire network, and the startActivity address is being updated.

The following is the Scheme protocol address that I sorted out the Alipay APP software and compiled in practical applications. I want to share it with you. If you don’t have any, you can comment @ me. I’m looking for additional protocol addresses. //Alipay: alipay:// //receipt: alipays://platformapi/startapp?appId=20000123 //Scan code: alipays://platformapi/startapp?saId=10000007 //Yue Bao: alipays://platformapi/startapp?appId=20000032 //transfer: alipays://platformapi/startapp?appId=20000221 […]

Java Alipay sandbox environment payment, SDK interface remote debugging [intranet penetration]

Article directory @[TOC] 1. Test environment 2. Local configuration 2. Intranet penetration 2.1 Download and install cpolar intranet penetration 2.2 Create tunnel 3. Test public network access 4. Configure a fixed second-level subdomain name 4.1 Reserve a second-level subdomain name 4.2 Configure the second-level subdomain name 5. Use fixed second-level subdomain names for access 1. […]

Alipay payment using java (sandbox environment)

Table of Contents 1. Preparation 2. Idea configuration file preparation 3. Back-end code writing Interface 1: Payment order Interface 2: Query order Interface 3: Order refund Interface 4: Query refund results Interface 5: Get the total bill Interface 6: Cancel order Interface 7: Callback interface Scheduled tasks: Actively query orders 4. Front-end code writing 5.Verification […]

Statistics | Python | Principal component analysis principal component score coefficient calculation

Foreword: Because spss cannot directly obtain the principal component score coefficient, refer to the articles written by other bloggers on csdn and sort out the code used to calculate the principal component score coefficient. Principle of principal component analysis Skip it first and add it later Principal component analysis code The libraries and file reading […]

POI implements Excel provincial and municipal three-level linkage java implementation

2003 version of Excel import java.io.FileOutputStream; import java.util.*; import com.google.common.collect.Lists; import org.apache.poi.hssf.usermodel.DVConstraint; import org.apache.poi.hssf.usermodel.HSSFDataValidation; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.DataValidation; import org.apache.poi.ss.usermodel.DataValidationConstraint; import org.apache.poi.ss.usermodel.Name; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.ss.util.CellRangeAddressList; import org.apache.poi.util.IOUtils; /** * @ClassName: test3 * @Author: yongtao.ding on 2019/5/29 9:48 * @Version: 1.0 */ public class test3 { public […]

Principal component analysis (PCA) and wine data set example code

1. Main steps of principal component analysis Principal component analysis (PCA) is an unsupervised linear transformation technique that is widely used in different fields, especially feature extraction and dimensionality reduction. His application areas include exploratory data analysis and denoising for stock market trading, and genomic data and gene expression level analysis in bioinformatics. PCA helps […]