皮带式摩擦静电分选机分选混合塑料颗粒的物理模型，李佳，Lucian Dascalescu，摩擦-气流静电分选利用空气涡流场与静电场的耦合场分选绝缘体混合物颗粒。本研究目的是建立数学模型与物理模型用于优化该分选过�

Grammar learning has been a bottleneck problem for a long time. In this paper, we propose a method of semantic separator learning, a special case of grammar learning. The method is based on the hypothesis that some classes of words, called semantic separators, split a sentence into several constituents. The semantic separators are represented by words together with their part-of-speech tags and other information so that rich semantic information can be involved. In the method, we first identify t