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一个很好用的增强的Timer库（可以取代VB的Timer控件）.-a good use of enhanced Timer (to be replaced VB Timer control).

表达式二叉树的实现。输入任意一个前序中序或后序表达式，可生成对应的表达式二叉树并树状打印，之后用户可以选择以前序中序或后序将表达式再次输出。-expression of the realization of a binary tree. An arbitrary input before the order or sequence after sequence expressions, which will generate the corresponding binary tree and the tree expression Print, after users can choose before the order or sequence after sequence of expression of a recurrence.

Jsp与Servlet的ppt教程,适合初学都入门的教程-Jsp Servlet ppt and guidance for beginners have caught the Directory

通过A51程序，学习者可以了解车辆控制器局域网（controller area network，can）的消息传输，有助于can总线传输概念的建立。

Plantronics 906 BackBeat userguide

说明：  ZMODEM C源码，可用于MCU实现ZMODEM传输协议(ZMODEM C source code, which can be used in MCU to implement ZMODEM transmission protocol)

编写一个函数，要求输入年月日时分秒， 输出该年月日时分秒的下一秒。 如输入2011年12月31日23时59分59秒， 则输出2012年1月1日0时0分0秒。 需要考虑闰年 和 2月的特殊情况 (Write a function that requires input date, hour, minute and second outputs of the date when the next second. If the input at 23:59:59 on December 31st, 2011, output at 0:00:00 on January 1, 2012. Leap year and February need to consider the special case)

说明：  在逆变器和有源滤波器设计中广泛应用的Clarke'变换，Hirofumi Akagi的PQ理论”的一个组成部分。(Clarke's Transformation widely used in inverter and active harmonic filter design. And an integral part to understand Hirofumi Akagi's 'pq Theory'.)

说明：  病毒传播动力学模型，考虑无症状患者（A），并分析病毒传播率(Virus transmission dynamics model, consider asymptomatic patients (A), and analyze virus transmission rate)

busbox 1.0-busbox 1.0, the first full edition of busybox.