<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[kangkyle的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/kangkyle</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; kangkyle]]></copyright><item><title><![CDATA[小技巧操作]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/121928930</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/121928930</guid><author>kangkyle</author><pubDate>Tue, 14 Dec 2021 15:49:23 +0800</pubDate><description><![CDATA[1.学生用计算器如何解方程

只要计算器上代ANS按键即可，现在开始：

举一个简单的例子。求解方程x∧2+5x+6=0的根。很显然，两个根为-2和-3，之所以选择这么简单的例子是便于讲解。拿出计算器，让ANS有一确定值，如0。然后输入ANS-(ANS∧2+5ANS+6)/(2ANS+5)。一直按“=”键，大约按十几次以后就会发现计算器显示的值为-2或者-1.999999……怎么样，这方法求得的根还比较准确。其实该操作是利用了牛顿迭代法求解。


...]]></description><category></category></item><item><title><![CDATA[EMD模态分解]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/102569094</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/102569094</guid><author>kangkyle</author><pubDate>Tue, 15 Oct 2019 16:13:59 +0800</pubDate><description><![CDATA[pyhht安装，直接pip install pyhht即可

# -*- coding: utf-8 -*-
import numpy as np
import pandas as pd
from pyhht.emd import EMD
from pyhht.visualization import plot_imfs
from sql_bind_data import sum_id_value...]]></description><category></category></item><item><title><![CDATA[算法准备（一）]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/96176629</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/96176629</guid><author>kangkyle</author><pubDate>Tue, 16 Jul 2019 20:03:15 +0800</pubDate><description><![CDATA[牛客网https://www.nowcoder.com/tutorial/95/700109bb761148b8a225f799e7bc456b

1.数据结构

链表：链表（list）作者：C小加

栈：栈（stack）作者：C小加

队列：队列（queue）作者：C小加

树：树（tree）作者：C小加

二叉树：二叉树（binary tree）作者：C小加

二叉树三种遍历：前序、...]]></description><category></category></item><item><title><![CDATA[python 笔记（二）numpy和pandas]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/92573989</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/92573989</guid><author>kangkyle</author><pubDate>Mon, 17 Jun 2019 10:18:13 +0800</pubDate><description><![CDATA[目录

1，numpy

Numpy

Numpy切片操作

np.c_和np.c_

Numpy随机数

numpy的ones_like函数/np.zeros

range() 与 np.arange()

Python中的shape()和reshape()

numpy.random详细解析

numpy- shape用法

numpy.argmin

hstack(value)将数组合并

...]]></description><category></category></item><item><title><![CDATA[python 笔记（一）——基本语法]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/91815363</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/91815363</guid><author>kangkyle</author><pubDate>Thu, 13 Jun 2019 11:37:11 +0800</pubDate><description><![CDATA[# -*- coding: utf-8 -*-

1.Python创建list


L = ['Michael', 100, True]
print L[0]#按照索引访问list
print L[-1]#倒序访问list
L.append('Paul') #追加到 list 的末尾
L.insert(0, 'Paul')
L.pop() #删掉list的最后一个元素
L.pop(2) #删掉索...]]></description><category></category></item><item><title><![CDATA[sql 语句的笔记]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/91812242</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/91812242</guid><author>kangkyle</author><pubDate>Thu, 13 Jun 2019 11:02:48 +0800</pubDate><description><![CDATA[1.cast拼接


select value, cast(cast(date_year as VARCHAR(10))+'-'+cast(date_month as VARCHAR(10))+'-'+cast(date_day as VARCHAR(10))+' '+cast(date_hours as VARCHAR(10))+':00:00.000'  as DATEtime        ...]]></description><category></category></item><item><title><![CDATA[APScheduler——Python定时任务框架]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/91809198</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/91809198</guid><author>kangkyle</author><pubDate>Thu, 13 Jun 2019 10:45:36 +0800</pubDate><description><![CDATA[APScheduler是一个Python定时任务框架，使用起来十分方便。提供了基于日期、固定时间间隔以及crontab类型的任务，并且可以持久化任务、并以daemon方式运行应用。目前最新版本为3.0.x。
在APScheduler中有四个组件：触发器(trigger)包含调度逻辑，每一个作业有它自己的触发器，用于决定接下来哪一个作业会运行。除了他们自己初始配置意外，触发器完全是无状态的。作业存储...]]></description><category></category></item><item><title><![CDATA[Android常见的报错问题（一）]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/81021406</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/81021406</guid><author>kangkyle</author><pubDate>Thu, 12 Jul 2018 19:58:23 +0800</pubDate><description><![CDATA[1.ADB not responding. If you'd like to retry, then please manually kill &quot;adb.exe&quot; and click 'Restart'程序偷偷占用了adb运行的端口号5037，解决步骤：cmd→netstat -ano | findstr &quot;5037&quot;,查看被那个占用了。启动任务管理器，进程-查看-选择列，勾选PID。干掉636的...]]></description><category></category></item><item><title><![CDATA[android 方法笔记（二）]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/80982293</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/80982293</guid><author>kangkyle</author><pubDate>Tue, 10 Jul 2018 10:47:35 +0800</pubDate><description><![CDATA[1.android ListView详解它以列表的形式展示具体内容，并且能够根据数据的长度自适应显示。列表的显示需要三个元素：1．ListVeiw 用来展示列表的View。2．适配器 用来把数据映射到ListView上的中介。3．数据    具体的将被映射的字符串，图片，或者基本组件。根据列表的适配器类型，列表分为三种，ArrayAdapter，SimpleAdapter和SimpleCursor...]]></description><category></category></item><item><title><![CDATA[android 方法笔记]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/80922972</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/80922972</guid><author>kangkyle</author><pubDate>Fri, 06 Jul 2018 16:25:14 +0800</pubDate><description><![CDATA[﻿﻿（1）super.onCreate(savedInstanceState)是调用父类的onCreate构造函数savedInstanceState是保存当前Activity的状态信息  在实际应用中，当一个Activity结束前，如果需要保存状态，就在onsaveInsanceState中，将状态数据以key-value的形式放入到saveInsanceState中。这样，当一个Activit...]]></description><category></category></item><item><title><![CDATA[文档分类]]></title><link>https://blog.youkuaiyun.com/kangkyle/article/details/80928808</link><guid>https://blog.youkuaiyun.com/kangkyle/article/details/80928808</guid><author>kangkyle</author><pubDate>Thu, 05 Jul 2018 16:15:03 +0800</pubDate><description><![CDATA[1.pdf2.doc3.excel4.cad]]></description><category></category></item></channel></rss>