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#PL
深入理解拉格朗日乘子法(Lagrange Multiplier) 和KKT条件
https://blog.csdn.net/xianlingmao/article/details/7919597在求取有约束条件的优化问题时,拉格朗日乘子法(LagrangeMultiplier)和KKT条件是非常重要的两个求取方法,对于等式约束的优化问题,可以应用拉格朗日乘子法去求取最优值;如果含有不等式约束,可以...
IT猿
·
2020-03-27
深入
理解
拉格朗
日乘
Lagrange
Failed to complete obtain psql count Master gp_segment_configuration Script Exiti
问题:在初始化过程中,如到以下问题:gpadmin-[FATAL]:-FailedtocompleteobtainpsqlcountMastergp_segment_configuration ScriptExiting!ScripthasleftGreenplumDatabaseinanincomplete...
IT猿
·
2020-03-27
Failed
to
complete
obtain
psql
Market Guide for AIOps Platforms
https://www.gartner.com/doc/reprints?id=1-5UWPRFW&ct=181126&st=sbAIOpsplatformsenhanceIToperationsthroughgreaterinsightsbycombiningbigdata,machinelearni...
IT猿
·
2020-03-27
Market
Guide
for
AIOps
Platforms
django_simple_captcha使用笔记
一、先来官方文档的步骤:Install django-simple-captcha via pip: pip install django-simple-captchaAdd captcha tothe INSTALL...
IT猿
·
2020-03-27
django
simple
captcha
使用
笔记
Basics of Algorithmic Trading: Concepts and Examples
https://www.investopedia.com/articles/active-trading/101014/basics-algorithmic-trading-concepts-and-examples.aspAlgorithmictrading (alsocalledautomatedtrad...
IT猿
·
2020-03-27
Basics
of
Algorithmic
Trading
Concepts
Machine Learning in Finance – Present and Future Applications
https://emerj.com/ai-sector-overviews/machine-learning-in-finance/Machinelearning hashadfruitfulapplicationsinfinancewellbeforetheadventofmobilebankingapps...
IT猿
·
2020-03-27
Machine
Learning
in
Finance
Present
AI AND THE BOTTOM LINE: 15 EXAMPLES OF ARTIFICIAL INTELLIGENCE IN FINANCE
https://builtin.com/artificial-intelligence/ai-finance-banking-applications-companiesfthere'sonetechnologythat'spayingdividends,it's AIinfinance. Arti...
IT猿
·
2020-03-27
AI
AND
THE
BOTTOM
LINE
Free Professional Resume Examples and Writing Tips
https://www.thebalancecareers.com/free-resume-examples-and-writing-tips-2063596Doyouneedtowriteor updatearesume toapplyforajob? A resume&nbs...
IT猿
·
2020-03-27
Free
Professional
Resume
Examples
and
application platform as a service (aPaaS)
Applicationplatformasaservice(aPaaS)isa cloudservice thatprovidesenvironmentsforthedevelopmentandrunningofsoftware applications. APaaSallows...
IT猿
·
2020-03-27
application
platform
as
service
aPaaS
LIST OF BEST OPEN SOURCE BLOCKCHAIN PLATFORMS
https://www.blockchain-council.org/blockchain/list-of-best-open-source-blockchain-platforms/ OpensourceBlockchainPlatformsOpensourcesoftwareisaradicalmodel...
IT猿
·
2020-03-27
LIST
OF
BEST
OPEN
SOURCE
Android DisplayMetrics 获取和屏幕相关的信息
Android源码中是这样来描述DisplayMetrics的。/***Astructuredescribinggeneralinformationaboutadisplay,suchasits*size,density,andfontscaling.*<p>ToaccesstheDisplayMetric...
IT猿
·
2020-03-27
Android
DisplayMetrics
获取
屏幕
相关
神奇的 SQL 之 MySQL 执行计划 → EXPLAIN,让我们了解 SQL 的执行过程!
开心一刻 某人养了一头猪,烦了想放生,可是猪认识回家的路,放生几次它都自己回来了。一日,这个人想了个狠办法,开车带着猪转了好多路进山区放生,放生后又各种打转,然后掏出电话给家里人打了个电话,问道:“猪回去了吗?”,家里人:“早回来了,你在哪了,怎么还没回来?”,...
IT猿
·
2020-03-27
SQL
执行
神奇
MySQL
计划
spring jdbcTemplate 事务,各种诡异,包你醍醐灌顶!
项目框架主要是spring,持久层框架没有用mybtis,用的是spring的jdbc; 业务需求:给应用添加领域(一个领域包含多个应用,一个应用可能属于多个领域,一般而言一个应用只属于一个领域),要求是给应用添加领域的时候,先将该应用已有的领域都删除,之后再将选中的领域添加到数据库; 为了减少准备工作,我利用...
IT猿
·
2020-03-27
spring
jdbcTemplate
事务
各种
诡异
复杂的字符串数组解析:{"setting":"简单:10:5,一般:5:10,困难:2:20"},使用split多次截取
"[0,{"id":563,"name":"测试题1","dscr":null,"picId":null,"setting":"简单:10:5,一般:5:10,困难:2:20"}"//像上面这种比较复杂的字符串数组怎么解析?{"setting":"简单:10:5,一般:5:10,困难:2:20"}//像这样的对象怎么解...
IT猿
·
2020-03-26
quot
复杂
字符串
数组
解析
(二)仅仅通过Application监听用户行为及App的在线状态和在线时长
先要实现功能,还是先从API去找。看看有没有你想要的。这里其实就是监听App内activity的状态。怎么办? 给个API所在地址:http://www.android-doc.com/reference/android/app/Application.html 看到没?这里有个方法registerActivi...
IT猿
·
2020-03-26
在线
仅仅
通过
Application
监听
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