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For any software that handles client requests, at some point, there must be a persistent point where all data related to the clients are stored. Those storages can be any thing (database, mainframes, files etc.). What if this software needs to access those storages with concurrent requests, knowing that opening a connection is memory and CPU consuming? A Connection Pool is a container of open and reusable connections. It will help you save both memory and CPU time. Also, it will help you in managing connections.

扩展卡尔曼滤波估算电池的SoC,电池采用戴维宁模型，并与安时积分法进行了比较，误差不超过5 ，结果可靠(The extended Calman filter to estimate the battery SoC and battery using Thevenin model, and compared with the current time integral method, the error is less than 5 , the result is reliable)

说明：  用于计算斜齿轮时变啮合线长,用matlab语言编写，总共包含两个程序，已经封装为函数，可以直接调用。(a matlab program used for calculate the length of time-varying-mesh-lines.)

winsock的局域网通信系统支持c/s单工通信-winsock LAN communications system to support the c/s single-communication

计算特征多项式的 m 序列的自相关系数。(Calculate the characteristic polynomial of the m sequence of autocorrelation coefficients.)

说明：  智能企业建站系统，该系统能让用户在短时间内迅速架设属于自己公司的企业网站。(Intelligent Enterprise Station Building System, which enables users to quickly set up their own company website in a short time.)

地球椭圆参数，提供给大家计算一下计算地球椭圆类的各项参数！-Ellipse parameters of the Earth" s

如 何 识 别 CPU 类 型-how to identify CPU type

一个用C语言编写的小游戏―五子棋。他具有一切五子棋的功能，能对战，人机大战，比较有意思。-a C language prepared by the small game- 331. He had 331 all functions, the screen can, man-machine war, more interesting.