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This paper proposes a Quality of Experience (QoE) test methodology for adaptive streaming service. We analyze the factors influencing the QoE of adaptive streaming, and evaluate the QoE of the end-to-end service. Our research gives the evidence that adaptive streaming improves end-users' subjective perception greatly compared with fixed-rate streaming in terms of QoE. Two groups of experiments are...
The applications of Virtual Reality technology and Virtual Instrument technology in communication teaching are introduced. In a virtual communication laboratory created by VR technology, a simulated telephone communication system is developed on LabVIEW. This system is helpful for the students majored in communications and the self-learners interested in the telephone system.
Particle swarm optimization is a new heuristic global optimization algorithm based on swarm intelligence. The algorithm is simple, easy to implement and has good performance of optimization. Now it has been applied in many fields. However, when optimizing multidimensional and multimodal functions, the basic particle swarm optimization is apt to be trapped in local optima, which is called premature...
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