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A non-linear unrestraint optimization model of mine ventilation network was established which took the minimum total energy consumption of mine ventilation network as optimization objective. In order to improve optimization ability and convergence speed of the model, an opposition-based enhanced fireworks algorithm(OBEFWA) was proposed. Firstly, population initialization strategy based on opposition-based learning and uniform randomization is adopted, and uniform randomization population generated by the strategy is competed with opposition-based population, so that the optimal initial population is selected as starting point of subsequent search. Secondly, fireworks explosion radius is finely controlled, so that explosion radius of fireworks populations of different generations shows non-linear decline, and that of the same population generation is coordinated and distriblted according to their own fitness values. The minimum dynamic threshold is set to decrease waste of search resources. Finally, selection strategy of elite opposition-based learning is adopted to strengthen search for neighborhood of elite fireworks, so as to improve global exploration ability of the algorithm. The experimental results show that total energy consumption of mine ventilation network optimized by OBEFWA decreases about 23.2% which meets adjustment constraints and wind demand of actual ventilation network, and OBEFWA has better optimization effect than particle swarm optimization algorithm and enhanced fireworks algorithm.

The modern cryptographic protocol specifies that only authorized participants can gain access to the key and obtain information. However, the way to leak passwords through intrusion into the system is endless, causing serious problems for modern information security. On this issue, the advantages of PUF for information security to provide further protection. For example:Arbiter PUF，RO PUF,SRAM PUF. This project is designed to integrate the physical information into the circuit design to achieve the design of the PUF. Comparing to existing RO-PUF, PISO shift register reduce the hardware. A 4-bit challenge can produce 16-bit random response, which greatly increases the number of challenge response pair, and the internal Hamming distance is measured by the FPGA.

An efficient resource sharing strategy is proposed for multimedia wireless networks. Assume the channel resource in a wireless system is partitioned into two sets: one for voice calls and one for video calls. In the proposed channel borrowing strategy, voice calls can borrow channels from those pre-allocated to video calls temporarily when all voice channels are busy. A threshold type decision policy is designed such that the channel borrowing request will be granted only if the quality of service (QoS) requirement on video call blocking will not be violated during the duration of channel lending. An analytical model is constructed for evaluating the performance of the channel borrowing strategy in a simplified wireless system and is verified by computer simulations. We found that the proposed channel borrowing scheme can significantly reduce the voice call blocking probability while the increase in video call blocking probability is insignificant. Index Terms--Channel borrowing strategy, performance analysis, QoS guarantee, resource sharing.