With the conclusion of design experience in centralized disposal and treatment of hazardous waste,the paper presents remarkable concerns in the project design in terms of practical problems encountered with from selection of plant site to design of main project and supporting facilities,getting over blindness to make the project design satisfy the requirements for utilization.

Defining the XML document by aspect-oriented programming to extend it is proposed to solve the problems found in original definition,such as too simple relationship of inclusion,code redundancy,scattered crosscut concerns and having to modify original elements if extending XML elements.

Separation of concerns is an important software engineering principle.

Research on optimization algorithms for inverse generating sequence diagram based on different concerns;

Aspect-oriented programming is extension and continuation of object-oriented programming,it can commendably deal with the problem of system crosscutting concern,to implement loosing coupling between business logic and non-business logic.

By introducing the concept of respect, AOP improves the separation of concerns, reduces code tangling, solves the problem of crosscutting concerns and improves the quality and efficiency of software.

The focus of research can be elaborated from its language,history,epic,humanist concern,and national tradition and culture.

Seeking the focus for the research, looking for shortcomings, and putting forward reasonable and operative approach for development are what should be researched on in the colleg.