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RSS订阅原创 C#WPF入门
1.引言WPF(Windows Presentation Fundation)是基于windows窗口的用户界面(User Interface)框架，在.NET framework框架下，开发交互图形界面。它支持多种设计方法，可直接使用工具箱拖拽创建控件，也可以通过xmal，cs语言接口设计。在cs内编辑控件触发事件函数，实现交互算法设计。本次实验完成简易计算机的ui设计，及其功能实现...
2018-11-24 17:16:21
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原创 codes
import numpy as npimport matplotlib.pyplot as pltfrom sklearn import datasetsfrom sklearn import linear_modelfrom mpl_toolkits.mplot3d import Axes3Ddef sigmoid(x): return 1 / (1 + np.exp(-x)
2017-12-19 21:18:11
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原创 关于LogisticRegression及其应用
1.算法简介Logistic回归是在线性回归基础上，针对线性回归的缺陷（误差统计独立假设，从属关系函数非概率）进行改进后的算法。它将目标变量进行转换后，在此基础上建立线性模型。变换过程为logit transformation：logit(pro) = log(pro) / (1 - log(pro))。其逆变换为sigmoid transformation：sigm(x) = 1 / (1
2017-12-17 11:33:27
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原创 单页爬虫
1.项目简介任务：爬取某基金网站数据， 以单页单条模式存储。 性能：抓取各式数据，以dict模式存入数据库，以json模式导出到文本。最后实现90分钟内对全站约3500支基金数据更新， 约100条error。2.版块说明List_page.py 简单抓取列表页面基金代号，方便后面到url队列生成。Crawl.py 分为Gen, Parse, Clean三个部分。 Gen为url队列生成， P
2017-11-30 21:01:28
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原创 scrapy framework
I learned scrapy these days. And wrote something out from it.To grasp the courses info on icourse.com.(in fact, I tried to grasp something else, and I found lots of pages are js in it)Not
2017-11-09 21:25:25
221
原创 Python connects to MongDB
Today, I finished the connection work from Python to MongDB. It uses the module pymongo for purpose.I'll give the codes directly, because it's very cold here, and I gotto go now...import
2017-10-31 17:28:14
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原创 My first Crawler
I wrote some crwalers these days, not so strong though. But it feels terific when they get the data back.Here some points which I value very important in the process.1. HTML parsing: I use
2017-10-27 17:05:50
196
原创 BOM header
Today, I played with Bs4 package, It works nicely on the htmtl parsing.I've always heard how troublesome it is about the enconds model in Python, and different versions. And I encoutered the stu
2017-10-24 16:36:06
425
原创 Python practice
Today, I try to use the modules in Python, and downloaded some popular modules. The BeautifulSoup and Requests..And I start to write more advanced program with data structure. I tried the que in
2017-10-23 16:55:02
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原创 Python practice
Today, I learn to use the commanding prompt of python(python shell). And also practice some easy syntax in python.Here is an easy sorting function I wrote : num = []tot = int(input("pleas
2017-10-22 17:29:07
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原创 Some notes as a beginner.
1. The concept of "Nosql"Most NoSQL stores lack true ACID transactions. And this could leads to a problem called "stale reads".And some NoSQL systems may exhibit lost writes and other forms of
2017-10-21 17:02:02
251
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