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demand As business grows, data volume becomes more and more complex, data volume becomes larger and larger, and requirements for database and server performance, high availability, disaster tolerance become higher and higher.Taking the current database environment as an example, the size of Windows 2008 r2 server + NAS storage + Oracle11.2.0.1+ ...

TCP socket communication How do processes communicate in the network? We know that there are many ways to communicate between local processes, such as pipeline, message queue, shared memory, synchronization and mutual exclusion. These methods require that the two processes of communication are located on the same host. So how to communic ...

what The name is very long and interesting. In general, this article is a summary of the use of mobx in the development of small programs. State management, as the name implies, is the management of the complex state of front-end pages. Here, I will not dwell on it. So although it's used in small programs, I think it's also a loss of inspirati ...

The Role of Handler Android message mechanism We all know that the UI of Android applications is drawn in the main thread (UI thread). If the main thread does some time-consuming operations, the main thread will be blocked. Time-consuming operations mainly include network access, large amount of computation, file reading and writing, etc., w ...

Encountered a bug, because the server in China, foreign users may use because of network reasons even if the request was sent, but the server still did not receive the uploaded data, need to ensure that the client successfully sent the request.So my idea is to collect failed requests and add them to the request failure queue. After a period of ...

Training Note _ch13_Use Bind to Provide Domain Name Resolution Service At the end of the article, you will post your notebook photos. The main contents of the article are as follows: DNS domain name resolution service Install and deploy the Bind service program Deployment of slave servers Secure Encrypted Transmission Deployment of Cac ...

Learning Records of Four Android Components I used to memorize the contents of the four components for interviews. In fact, in project development, except for activities, they are seldom used. Even if they are used, they are just a copy of Du Niang. Now suddenly realize that I do not understand very much, I feel that I can no longer under ...

1. Instantiating URL objects The first step is to instantiate a URL object and pass in the address whose parameter is the requested data. URL url = new URL("http://www.imooc.com/api/teacher?type=3&cid=1"); 2. Get the HttpURLConnection object Calling the open Connection method of the URL object returns a URLConnection object, and the URLConn ...

In the process of iOS development, one of the commonly used technologies is APP to upload pictures. Although this knowledge point is not difficult, the needs of uploading pictures are different. For example, sometimes you need to select a specified number of photos at the same time in the album at one time, and the number of selected pictures ...

Original title: YOLO: Real-Time Object DetectionEnglish text: https://pjreddie.com/darknet/... Highly recommended (TED video): https://www.ted.com/talks/jos... You only look once (YOLO) is the most advanced real-time object detection system at present.On a Titan X, it can process 40-90 frames per second in real time, with accuracy as high as ...