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用普通I/O口模拟I2C通信读写vs1307时钟芯片程序，此程序在MPLAB IDE环境下开发，在PIC16F877单片机上运行通过。(With common I/O port to read and write clock chip vs1307)

Operating System Concepts SILBERSCHATZ/GALVIN/GAGNE

Introduction to four classic articles OFDM

Circles We can extend the Hough transform to other shapes that can be expressed parametrically. For example, a circle of fixed radius can be described fully by the location of its center (x, y). Think of each feature (edge) point on the circle as saying, ”if I’m on the circle, the center must be in one of these places”. It turns out that the locus of these votes is itself a circle. But what about circles of unknown size? In this case, we need a third parameter: the radius of the circle. So, we can parameterize circles of arbitrary size by (x, y, r). Instead of casting votes in a circular pattern into a two-dimensional accumulator, we cast votes in circles of successively larger size in a three-dimensional accumulator.

Some very interesting C introduction questions, created by me.

Matlab GUI教程 初级系列（4） 文件操作 列表框 Ecxel数据读取(The Matlab GUI primary tutorial series (4) file operations the list box Ecxel data read)

matlab source code neural network

matlab冈萨雷斯答案： 里面是最全的答案，所有习题都有(Gonzalez matlab answer: it is the whole answer, all exercises are)

Computing the BER for MIMO system with MINIMUM MEAN SQUARE ERROR Equalization in a Rayleigh fading channel.

state space model for induction machiine