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Simulate Human Saccadic Scan-Paths in Target Searching
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作者 Lijuan Duan Jun Miao +2 位作者 David M. W. Powers Jili Gu Laiyun Qing 《International Journal of Intelligence Science》 2016年第1期1-9,共9页
Human saccade is a dynamic process of information pursuit. There are many methods using either global context or local context cues to model human saccadic scan-paths. In contrast to them, this paper introduces a mode... Human saccade is a dynamic process of information pursuit. There are many methods using either global context or local context cues to model human saccadic scan-paths. In contrast to them, this paper introduces a model for gaze movement control using both global and local cues. To test the performance of this model, an experiment is done to collect human eye movement data by using an SMI iVIEW X Hi-Speed eye tracker with a sampling rate of 1250 Hz. The experiment used a two-by-four mixed design with the location of the targets and the four initial positions. We compare the saccadic scan-paths generated by the proposed model against human eye movement data on a face benchmark dataset. Experimental results demonstrate that the simulated scan-paths by the proposed model are similar to human saccades in term of the fixation order, Hausdorff distance, and prediction accuracy for both static fixation locations and dynamic scan-paths. 展开更多
关键词 Saccadic Scan-Paths Eye Movement Fixation Locations Dynamic Scan-Paths
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Massive MIMO异构网的高能效资源分配 被引量:5
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作者 刘文佳 杨晨阳 李琪 《信号处理》 CSCD 北大核心 2017年第7期901-910,共10页
为满足第五代移动通信系统高频谱效率和高能量效率的需求,提出一种工作在不同频段下行两层异构网中的高能量效率资源分配方法,考虑用户数据率需求和基站最大发射功率。天线和传输带宽是影响系统能量效率的关键因素。通过研究宏基站和小... 为满足第五代移动通信系统高频谱效率和高能量效率的需求,提出一种工作在不同频段下行两层异构网中的高能量效率资源分配方法,考虑用户数据率需求和基站最大发射功率。天线和传输带宽是影响系统能量效率的关键因素。通过研究宏基站和小基站的天线资源和带宽分配发现:当系统天线数很大时,发射功耗的影响可以忽略不计;给定带宽分配因子时,达到宏基站或微基站最大发射功率的天线分配因子几乎可以达到最高能效;给定天线分配因子时,系统平均总功耗是关于带宽分配因子的下凸函数,存在全局最优带宽分配因子使能效最高。仿真结果表明,与给定带宽和天线资源的异构网和小小区网络相比,所提出的异构网可以显著提高系统能量效率,而且在大量用户、高数据率需求时能效提升更明显。 展开更多
关键词 异构网 能量效率 天线 带宽
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PDL Reduction in Arrayed-Waveguide Gratings by Control of Stress in the Waveguide
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作者 Se Yoon Kim Joo-Hoon Lee +2 位作者 Jaegeol Cho Dong-Su Kim Sun Tae Jung 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期287-288,共2页
We have demonstrated polarization insensitive AWGs by controlling the doping concentration of Boron in overcladding and the etching depth of waveguide. The proposed method uses the conventional fabrication process and... We have demonstrated polarization insensitive AWGs by controlling the doping concentration of Boron in overcladding and the etching depth of waveguide. The proposed method uses the conventional fabrication process and does not degrade optical properties and reliability characteristics. 展开更多
关键词 PDL Reduction in Arrayed-Waveguide Gratings by Control of Stress in the Waveguide on of in by
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