中文摘要：

处理工程矛盾问题时,经常会遇到复杂矛盾.但由于目前还没有对复杂矛盾问题的定义及形式化描述进行过研究,所以无法对其进行智能化处理.为解决此问题,定义了复杂矛盾以及矛盾信息元和矛盾信息元集等反映其本质和内涵的一些重要概念,并给出了复杂矛盾问题的信息元表示的方法和步骤.这些成果为工程矛盾问题智能化处理中复杂矛盾问题的分析和解决提供了理论依据.

英文摘要：

Complex contradiction often occurs in handling engineering contradictions. However, its definition and formalized description have not been studied, whieh make intelligent processing impossible. In order to solve the problem, complex contradiction and some key terms such as contradictory information unit and contradictory information unit set are defined and clarified. Also, the methods and steps expressing information units of complex contradiction are given. The results can provide theoretical basis for the analysis and solution of complex contradiction in intelligent processing on engineering contradiction.