System and method for determining a presence state of a personJacob T Biehl, Althea Turner,Pernilla Quarfordt,Anthony Dunnigan,William Van Melle,Gene Golovchinskymag(2014)引用 42|浏览25暂无评分AI 理解论文溯源树样例生成溯源树,研究论文发展脉络