If the reference clock is recovered from the input data ,the data rate must at a low speed. Because there is a large clock jitter when the input data at a high speed .In this paper ,a new method of synchronization has carried out for a wireless communication system .The source of data come from the SDI interface,whose rate is 1.485Gbps.The new mechanism avoid introducing the extra hardware by varying the frames structure.The length of frame is changed by adding difference length of 0 at the tail of the frame.

To solving Chinese text categorization, a fast algorithm is proposed. The basic idea of the algorithm is: first constructs a weighted value of keywords dictionary which is constructed in key tree, then using the Hash function and the principle of giving priority for long term matching to mapping the strings in documentations to the dictionary. After that, calculate the sum of weights of the keywords which has been matched successfully. Finally take the maximum for the result of the classification. The algorithm can avoid the difficulty of Chinese word segmentation and its influence on accuracy of result. Theoretical analysis and experimental results indicate that the accuracy and the time efficiency of the algorithm is higher, whose comprehensive performance reaches to the level of current major technology.

Generally, when we optimize the object code of expression in source program, we get the optimizing code in the binary tree of this expression. Expressions in source program are in infix form, while the prefix form is more efficient for the binary tree. Hence this paper is to provide an effective transition algorithm of arithmetic expression from infix form to prefix form.