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Cognitive Radio (CR) which aims to improve the spectrum utilization by accessing opportunistically the spectrum originally licensed to a primary system is a promising concept. OFDM is regarded as a potential technology for CR systems and dynamic resource allocation is an important task in such systems. This paper focuses on the sub carrier and power allocation algorithms which are to maximize secondary...
The development of information technology brought a new prospect for the network study, the adaptive learning has been possible to meet learner's individual requirements. The case-based learning may provide the simulation situation for the learner, but the adaptive learning takes on the both superiority of the case-based learning and simulation situation. It takes the case as the study object, shields...
According to the nonlinear closed electrohydraulic proportional system, a multiple sliding mode adaptive control method is proposed. Recursive technique is used to simplify the control problem of higher order system. A robust adaptation scheme was used to reduce the tracking error resulted from system uncertainties. Firstly, the recursive technique and state feedback precise linearization scheme is...
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