Concerning the low throughput and too much logic resource usage in the process of regular expressions matching, an improved Deterministic Finite Automaton (DFA) regular expression matching algorithm fully based on Field-Programmable Gate Array (FPGA) logic circuit was designed. Firstly, the result that most transfer edges of each state in DFA would point intensively to the same state characteristics was counted; then an acquiescent transfer edge for each state setting in DFA was provided according to the transfer matrix of regular expressions; finally, simplified logical circuit was given, and measurement was conducted on the L7-filter rule set. The experimental result shows that, compared with the former Nondeterministic Finite Automaton (NFA) algorithm, 10%-60% rules get a higher throughput, and 62%-87% rules cost less logic resources.

In a large-scale Wireless Sensor Network (WSN), the nodes closer to the single sink node use up their energy more quickly than others because of relaying more packets so that the network is invalid rapidly. In order to elongate the network lifetime, it is required to deduce the hops from sensor node to sink node. An efficient method is to deploy multiple sink nodes instead of single one. Therefore, it needs to be considered that how many sink nodes should be deployed on minimizing network cost and maximizing network lifetime. A network lifetime model and a cost model were proposed in WSN with multiple sink nodes and a new method was presented to determine the optimal number of sink nodes by computing the Ratio of Lifetime to Cost (RLC). The theoretical studies show that the number of sink nodes is related to the cost of sensor nodes and sink nodes, the network scale, the number of critical sensor nodes and the transmission power of sensor node. The simulation results prove the theoretical conclusion.

The method was introduced to encapsulate the detailed controls of the concrete DVB-CI device with device driver and provide the uplayer program an abstract device on the embedded Linux system. A DVB-CI device driver based on MontaVista's Hard Hat Linux system and IBM STB02500 Set-Top Box Integrated Controller was implemented as an example.

A development framework for human-oriented workflow management system was designed and implemented. A case of specific scenario using this developement framework was given. The framework was divided into three layers, business object layer, runtime layer, and business entity layer. Business object layer provided efficient and concise API; Runtime layer set up a manageable runtime environment to make application run reliably; Business entity layer stored and maintained business object. Developing application with the framework will decrease the development complexity and make system maintain easier.