An optimal quality adaptation mechanism for end-to-end FGS video FGS video transmission

In this paper, we propose a novel optimal quality adaptation algorithm for MPEG-4 fine granular scalability (FGS) stream over wired network. Our algorithm can maximize perceptual video quality by minimizing video quality variation and increasing available bandwidth usage rate. Under the condition that the whole bandwidth evolution is known, we design an optimal algorithm to select layer. When the knowledge of future bandwidth is not available, we also develop an online algorithm based on the optimal algorithm. Simulation showed that both optimal algorithm and online algorithm can offer smoothed video quality evolution.     

对中等职业教育面临困境的原因分析

中等职业教育是教育体系的重要组成部分，如今，中等职业教育面临着严峻的困难，如何正确认识和分析这些问题是其进一步发展的基础。     

研究性学习中科学教育与人文教育的融合

研究性学习融实践性、开放性、探究性、自主性为一体,以培养、提高学生创造性学习为核心,以激发潜能、发展个性和完善人格为重点。因此,在研究性学习的教学活动过程中,始终追求科学教育与人文教育的融合,全面提高学生的综合素质,是当前教育选择的目标,也是未来教育发展的必然趋势。