In this article, hydrogen is adopted to displace the ideal gas in the experiment of "measuring the Molar gas constant R by displacement method" and a corresponding calculator program is designed.

A new microscale experimental plan for determination of molar gas constant by displacement method had been presented.

Via introducing of F-ions,a kind of core-shell Fe/Al nanocomposite had been prepared by displacement method,in which the micron Al grain were coated in a lay of nanometer Fe particles.

According to the current technical level and the concrete situation of the storage/distribution station,this paper puts forward three schemes for the replacement of the natural gas in the spherical tank(inert gas replacement,water replacement and gas direct replacement),and through comparison of these schemes,holds that the gas direct replacement is more convenient and economic.

Replacement methods of the process system were introduced briefly in new LPG supply station, before put it into operation.

This paper involves in the preparation of Cu Ag bimetallic powders with dendritic and hexagonal morphologies by replacement method at the exist of macromolecule dispersant.

This article mainly introduces the whole process of solving the problems of replacement the Spanning tree.