中文摘要：

研究三元形式概念分析下的认知系统模型，提出了充分信息粒、必要信息粒及充分必要信息粒等概念，并在给定“条件”下，建立了如何将任意信息粒转换为充分信息粒、必要信息粒和充分必要信息粒的有效方法。

英文摘要：

This study mainly focuses on cognitive system model in the framework of triadic formal concept analysis. More precisely,the notions of sufficient information granule,necessary information granule,and sufficient and necessa-ry information granule are proposed.Also,methods of transforming arbitrary information granule into sufficient,necessa-ry,and sufficient and necessary information granules are presented under the background of fixing the third dimension.