中文Python USES Deep Neural Networks to Identify Siamese and British Short.
Let’s take a couple of pictures and see how the cat is Siam? Which cat is short?
First Siam
Taking Tik Tok and Ease Cloud Music as An Example to Discover Different Requirements of the Three Stages of User Retention
In general, the employee will leave the job within one month and leave the company for half a year. The reasons for the departure will be different for two years or more.
A month out, usually can’t adapt to the job or related to the work itself.
The situation of half a year, general and direct superior concerned.
More than 2 years left, basically belong to the recognition company, but the development is limited
In fact, the retention of the product is similar to that of the employee, and the reasons for the short-term retention, interim retention and long-term retention are very different.
Ambari Installation and Custom Service Initial Implementation
Ambari installation
1 Ambari profile
Apache Ambari project by developing software is the purpose of the hadoop cluster configuration, monitoring and management, in order to make the management more simple hadoop.Ambari also provides a RESTful interface implementation based on itself of intuitive, easy-to-use web management interface.
Ambari allows system administrators to the following:
1. Provide installation management hadoop cluster;
2. Monitor a hadoop cluster;
3. The extension ambari custom service management functions.
The Implementation of Cobub’s Codeless Capture Technology
With the advent of the era of big data, data mining has become more and more important.Front end point buried as a more mature data access method is widely used.Currently buried point is divided into two ways, and will come with no points.Sets a buried point is easy to understand, is called the SDK API, in the code inserts buried point related code, user behavior acquisition.Because we are in development projects, buried point are manually, every business needs change to buried point everywhere, and no burial code, which does not need to be manually inserted into the code, just prior to related configuration, the SDK automatically collect user behavior, avoided because of the change of demand, and buried the great degree error causes such as to bury some heavy and complicated work.This paper mainly introduces the technical implementation of codeless capture technology.
Three Years Running, a Million Micro-service Data Analysis Framework
Language knowledge used in architecture:
In recent years, data analysis has developed rapidly and we have also made a micro data analysis tool.The product has been successfully operated for three years, fulfilling the daily life of millions of enterprises.The product structure is very simple, with the simplest language in the world PHP, the most common database mysql, the server can choose apache or choose nginx, all your own preferences.
1. Microservice architecture diagram:
Actual Combat of Apache NiFi Processor
1 Introduction
What is Apache NiFi? NiFi’s website explains: “an easy-to-use, powerful, reliable data processing and distribution system.” Popular, namely the Apache NiFi is an easy to use, powerful and reliable data processing and distribution system, its designed for the data stream, it supports highly configurable indicator diagram of data routing, transformation and mediation logic system.
To NiFi can describe more clearly, through NiFi architecture to do a brief introduction to below, as shown in the figure below.
How Much Do You Know about Distributed Coordination Service Zookeeper?
Zookeeper profile
Since we learned about a distributed framework (dubbo), which involved zookeeper, let’s start with a brief introduction to zookeeper.Zookeeper is a distributed coordination service that manages a large number of hosts.
1. Distributed applications
Distributed applications can perform specific tasks by coordinating them between them, and a fast and effective way of running networks across multiple systems at a given time (and at the same time)
Distributed applications have two parts: the server and the client application.As shown in the figure below:
Activiti analyses
The Activiti framework is one of the workflow frameworks that have developed rapidly in recent years with its open source features.Another workflow framework, JBPM5, is currently a very popular workflow framework.While these two frameworks are two different companies, the two frameworks have a lot to do with it.Tom Baeyens, the director of the Activiti workflow framework, has previously worked for jBoss, currently the publisher of JBPM5, as the chief architect of the previous JBPM4 workflow engine.But it was speculated that Tom Baeyens left jBoss to work for Alfresco because of internal contradictions within jBoss and a serious disagreement over the future version of the workflow engine.However, for months, Tom Baeyens has launched Activiti, an open-source workflow system based on the JBPM4 workflow engine.
(中文) RPC框架技術初窺
(中文)
RPC是什么
RPC（Remote Procedure Call Protocol）——遠程過程調用協議，它是一種通過網絡從遠程計算機程序上請求服務，而不需要了解底層網絡技術的協議。
RPC采用客戶機/服務器模式。請求程序就是一個客戶機，而服務提供程序就是一個服務器。首先，客戶機調用進程發送一個有進程參數的調用信息到服務進程，然后等待應答信息。在服務器端，進程保持睡眠狀態直到調用信息到達為止。當一個調用信息到達，服務器獲得進程參數，計算結果，發送答復信息，然后等待下一個調用信息，最后，客戶端調用進程接收答復信息，獲得進程結果，然后調用執行繼續進行。
以上是百度百科對RPC的解釋。
一個通俗的描述是：客戶端在不知道調用細節的情況下，調用存在于遠程計算機上的某個對象，就像調用本地應用程序中的對象一樣。
(中文) 深入解析jquery實現原理第一章
JQuery is a very good JavaScript library, which greatly enhances the development experience of the front end js, so I recently looked at the source code of JQuery and wanted to share some of my understanding with you.