简介 一个开源的数据可视化工具，有丰富的插件和功能强大的仪表盘配置。 安装和使用 使用Docker进行安装十分简单，启动对应的镜像即可。此处使用dockerhub的镜像monitoringartist/grafana-xxl:latest 配置参数说明 GF_DEFAULT_INSTANCE_NAME=grafana GF_DATABASE_URL=mysql://<DBUSER>...

ELK means ElasticSearch + Logstash + Kibana. These products could provide a convenient way to analyze all kinds of logs. This post record the way I use them. Here is the versions in my environment...

Tomcat Tricks Resolve character encoding Adding URIEncoding in Connector configuration like following. <Connector executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" connectionTi...

k-近邻算法 kNN k-近邻算法(kNN)采用测量不同特征值之间的距离方法进行分类。 优点：精度高，对异常值不敏感，无数据输入假定 缺点：计算复杂度和空间复杂度都较高 适用数据范围：数值型和标称型 决策树 决策树的关键在于建立决策树。 利用ID3方法构建决策树：通过分别计算将数据按照每种特征进行划分后的信息增益，得到最佳划分特征，并递归获得决策树。 香农熵： 对于任意一个随机变量X，...

System wide variables setting (including GUI application) /etc/launchd.conf is the configuration file for setting system wide variables. Following is an example. setenv JAVA_VERSION 1.6 setenv JAV...

SSH tunning proxy Dynamic forward: ssh_server will using dynamic port to access the target accroding the request of the ssh client on local_port. ssh -D <local_port> <user>@<ssh_se...

Following is a simple reverse proxy configuration for Apache2. Put these codes in httpd.conf file. # This is setting is for overriding the default conf <VirtualHost *:80> ServerName loca...

Redis is an open source, BSD licensed, advanced key-value cache and store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets, sorted sets, bitma...

第一部 叶文洁父亲叶哲泰在文革期间被批斗致死，其母亲绍琳参与批斗。 叶文洁在内蒙建设兵团劳作，遇到白沐霖并为其抄写信件，信件出事后，遭到白沐霖出卖并被关押。其间看见其妹妹叶文雪签过字的举报其父亲的材料，并得知叶文雪死于文革武斗。 叶文洁父亲之前的学生杨卫宁救出了叶文洁，并带她到红岸基地，叶文洁表示愿意加入基地。 汪淼被到一个军方的指挥中心参加会议，得知近来许多与“科学边界...

1. Import appropriate MathJax library in your page Best way of importing MathJax library is using CDN links. For example, if using TeX/LaTeX or MathML, should import following code in your page. ...