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Analysis of IEEE 802.15.4 CSMA/CA scheme with homogeneous or saturated traffic has received considerable attention recently since a great convenience is offered to applications of low-power and low-rate wireless sensor networks (WSNs) which almost touch upon all aspects of our life. In this paper, we propose a stochastic analysis approach to evaluate the(More)
Abshacf-Aiming at the pipeline safety evaluation, this paper describer a magnetic flux leakage(MFL) model of pipeline defects inspection, designs a MFL intelligent inspection pig to inspect different pipelines. The intelligent Pig includes driver mbof system contmUer, data pmcssor and etc. It can be used for multi-radius pipelines and various work(More)
Studies of the IEEE 802.15.4 Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) scheme have been received considerable attention recently, with most of these studies focusing on homogeneous or saturated traffic. Two novel transmission schemes-OSTS/BSTS (One Service a Time Scheme/Bulk Service a Time Scheme)-are proposed in this paper to improve(More)