幼儿园"科学游戏共享体验场"(Science Game Share Experience Place),简写为"SGSEP",是利用幼儿园已有的公共空间资源,围绕科学教育内容开辟的户外大型公共游戏区域环境。在一定的空间范围内,通过空间的设计、规划...幼儿园"科学游戏共享体验场"(Science Game Share Experience Place),简写为"SGSEP",是利用幼儿园已有的公共空间资源,围绕科学教育内容开辟的户外大型公共游戏区域环境。在一定的空间范围内,通过空间的设计、规划、安排及适宜的设备和材料的提供而形成有目标、有内容、有结构的户外公共区域游戏环境空间。SGSEP的理论模型分为静态的内容与要素模型和动态的结构专业模型。静态模型包括:内容—分场—功能区—硬件要素—软件要素;动态模型包括:体验线—材料区—操作区—展示区。以成都市温江实验幼儿园为个案,遵循SGSEP动静模型,进行了多年的实践探索,取得了明显的成效。展开更多
We study a spectrum sharing problem where multiple systems coexist and interfere with each other. First, an analysis is proposed for distributed spectrum sharing based on Prisoners' Dilemma (PD) in Cognitive Radio...We study a spectrum sharing problem where multiple systems coexist and interfere with each other. First, an analysis is proposed for distributed spectrum sharing based on Prisoners' Dilemma (PD) in Cognitive Radios (CRs). In one-shot game, selfish and rational CRs greedily full spread their own spectrum space in order to maximize their own rates, which leads to Nash Equilibrium (N.E.). But with long term interaction, i.e., Iterated Prisoner's Dilemma (IPD), CRs can come to cooperate and acquire the social optimal point by using different evolutionary strategies such as Tit For Tat (TFT), Generous TFT (GTFT), etc. Also we compare the performances of the different evolutionary strategies in noise-free and noisy environments for two-player games. Finally, N-player IPD (N-IPD) is simulated to verify our conclusions that TFT is a good strategy for spectrum sharing in CRs.展开更多
文摘幼儿园"科学游戏共享体验场"(Science Game Share Experience Place),简写为"SGSEP",是利用幼儿园已有的公共空间资源,围绕科学教育内容开辟的户外大型公共游戏区域环境。在一定的空间范围内,通过空间的设计、规划、安排及适宜的设备和材料的提供而形成有目标、有内容、有结构的户外公共区域游戏环境空间。SGSEP的理论模型分为静态的内容与要素模型和动态的结构专业模型。静态模型包括:内容—分场—功能区—硬件要素—软件要素;动态模型包括:体验线—材料区—操作区—展示区。以成都市温江实验幼儿园为个案,遵循SGSEP动静模型,进行了多年的实践探索,取得了明显的成效。
基金Supported by the "863" Program (No.2009AA01Z241)the National Natural Science Foundation of China (No.60772062)+2 种基金Key Scientific Research Project of Office of Education in Jiangsu Province (No.06KJA51001)Scientific Research Project of Office of Education in Jiangsu Province (No.8KJB510015)Startup Funding (No.NY208048)
文摘We study a spectrum sharing problem where multiple systems coexist and interfere with each other. First, an analysis is proposed for distributed spectrum sharing based on Prisoners' Dilemma (PD) in Cognitive Radios (CRs). In one-shot game, selfish and rational CRs greedily full spread their own spectrum space in order to maximize their own rates, which leads to Nash Equilibrium (N.E.). But with long term interaction, i.e., Iterated Prisoner's Dilemma (IPD), CRs can come to cooperate and acquire the social optimal point by using different evolutionary strategies such as Tit For Tat (TFT), Generous TFT (GTFT), etc. Also we compare the performances of the different evolutionary strategies in noise-free and noisy environments for two-player games. Finally, N-player IPD (N-IPD) is simulated to verify our conclusions that TFT is a good strategy for spectrum sharing in CRs.
