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In this paper, we present a new and dependable disaster broadcasting network. The urgent information is broadcasted in the low-frequency band of 40–80kHz and modulated with reliable pulse width modulation(PWM). The coverage of one low-frequency broadcasting station is more than 500km. With excellent propagation characteristics, the low-frequency signal could penetrate into remote areas which are usually...
In this study, a multi-objective hybrid genetic algorithm (MOHGA) is proposed to optimize a multi-objective imperfect preventive maintenance (MOIPM) model. The MOHGA proposed not only utilizes a Pareto-based technique to determine and retain the superior chromosomes as the GA chromosome evolutions are performed, but also guides their search direction. In order to obtain diverse non-dominated solutions...
This study minimizes the periodic preventive maintenance cost for a series-parallel system using the particle swam optimization (IPSO). The optimal maintenance periods for all components in the system are determined efficiently. The proposed IPSO considers maintainable properties of a seriesparallel system. The importance measure of components is utilized to evaluate the effects of components on system...
Logistics has received considerable attention recently due to the rapid technological development of electronics and the Internet. Normally, clients expect items to be delivered at times that are convenient for their own schedules. Therefore, a multi-objective problem (MOP) model that simultaneously considers the depot desires and clients expectations can better elucidate the real logistics operations...
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