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With the rapid development of information technology and Internet, the mass data storage of Internet is an urgent problem to be solved. Due to the insufficiency of single NameNode, a new improved data storage method based on HDFS was proposed. In this method, consistent hashing strategy was adopted for metadata allocation; NameNode clusters were built and BLT was used for management of NameNode mapping;...
A conventional grey Markov model will produce large errors when it's used for the prediction of a sequence with large volatility. These errors can lead to prediction failure. So it is necessary to improve the model. In order to reduce the volatility, the logarithm of the original sequence is firstly calculated, and then the minimum error is used to replace the relative error of the grey model. After...
Current Information hiding algorithms for webpage have some shortcomings, such as the ability of concealment is poor and the embedded capacity is little. As the tag and its' attributes have multi-express rules, a new information hiding algorithm is proposed in this paper. This Information hiding algorithm sets secret information into a binary sequence, then set 3 bits as a set to be hidden in page...
Pattern matching is an important detecting method of a misuse intrusion detection system. With the increase in the number of rules, the performance of pattern matching algorithm has been a gradually decline and has been a bottleneck. A new type of pattern matching based on suffix tree is proposed. The method mines rule's data structure and prunes rule set based suffix tree, the model size of the search...
The popular education usually emphasizes the function of teaching in school and belittles the importance of practicing and experimenting in today's education. This paper discusses some problems of a new intranet-based multimedia education platform, analyzes the principle of intranet-based multimedia education platform, and discusses the educational style based on the intranet-based multimedia education...
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