the location based collaboration, the change of the spatio- temporal relationship of the people-people or people-place is the key context for collaboration. So, the location based collaborative environment should support the spatio-tempor

ue to the volume conduction multichannel electroencephalogram (EEG) recordings give a rather blurred image of brain activity. Therefore spatial filters are extremely useful in single-trial analysis in order to improve the signal-to-noise ratio.

广域测量系统实测信息及故障集仿真结果构成了电网时空大数据，如何采用大数据技术对它们进行快速、高效地挖掘，实现大电网在线安全评估与防御是智能电网核心目标之一。从电网广域时空量测信息角度，解释了电网时空大数据的内涵，提出大电网在线稳定态势评估与自适应防御体系(stability situation assessment and adaptive defense control system，ST-SADC)的整体架构及关键技术。ST-SADC 以大数据分析与处理为底层技术支撑，基于广域时空量测信息实