Dynamics and transformation of dissolved organic carbon (DOC) in paddy soils of the red soil region were studied by sampling analysis and laboratory incubation.

This article analyzed the location space "characteristic " of the pedestrian mall system of Sanxia Square based on "location theory", and further interpreted from the angle of "physical form", "activity and meaning"etc.

According to the characteristics of workflow process execution,a kind of reactive activity-centered process meta-model is defined and a kind of graphical notation is provided for it,at the same time,for this meta-model,a kind of dynamic semantics is specified,which represents the runtime behavior of the process and can be expressed as a finite state automata.

In order to deal with the problem that current digital rights expression models have less ability to describe dynamic semantics, a new model, DDRM(Dynamic Digical Rights Model), which can describe action state was presented.