The stable and homogeneneous aqueous suspension of carbon nanotubes was prepared in this study. The stability of the nanofluids was improved greatly due to the use of a new dispersant, humic acid. The thermal conductivity of the aqueous suspension was measured with the 3ω method. The experimental results showed that the thermal conductivity of the suspensions increases with the temperature and also is nearly proportional to the loading of the nanoparticles. The thermal conductivity enhancement of single-walled carbon nanotubes (SWNTs) suspensions is better than that of the multi-walled carbon nanotubes (MWNTs) suspensions. Especially for a volume fraction of 0.3846% SWNTs, the thermal conductivity is enhanced by 40.5%. Furthermore, the results at 30°C match well with Jang and Choi’s model.

Multimedia technology in the field of education and teaching has made great achievements. It is also used widely in the area of sport. However, multimedia technology in the teaching of basketball tactics is still in the initial stage. The paper is to study the application of multimedia technology in teaching basketball tactics, and to make "basic tactics of basketball teaching" Multimedia CAI Courseware. The Study shows that it is possible to use multimedia technology in basketball tactics, and it is bound to help improve basic tactics of basketball teaching.

With the development of economy and the progress of the society, computer multimedia technology emerges, as the times require. Computer multimedia enrich people's lives. For us, it not only provides a better visual experience and auditory enjoyment , but also plays an supporting role powerfully in solving the complicated work . The purpose of this paper is to study the application of multimedia technology in sports test and to explore the significance of promoting sports fair by multimedia technology.