The main content of this article is the analysis of chances and challenges after China enters WTO. It also points out how to use competition to seek countermeas
A computer-aided design system, which is base on the knowledge of draping and frame-producer methods, is put forward. All kinds of knowledge applied here are ab
By means of ultra-violet(UV)irradiation with photoini-tiator and multifunctional crosslinking agent,thecrosslinking modification of ultrahigh molecular weightpo
The efforts of heavy metals on activated sludge microorganisms are reviewed. Although some heavy metals play an important role in the life of microorganism, hea