If the short title is not enough to show the content of the paper or reflect the nature of a series of research, it can be solved by positive and negative titles, and the specific experimental materials, methods and contents can be supplemented by adding negative titles, so that the titles can be enriched and accurate, rather than generalized. Like what? Quot Dynamic Characteristics of Active Dislocation Groups —— (Subtitle) Computer Simulation of Sliding Characteristics of Active Dislocation Groups.