New challenges are introduced when people try to build a general-purpose mobile agent middleware in Grid environment. In this paper, an instance-oriented securi
Atmospheric concentrations of polycyclic aromatic hydrocarbons (PAHs) were measured during various seasons at six different cities/locations in Qingdao alongsho
A long thick-walled hollow cylinder ofpiezothermoelastic materials was studied in this work. The gradient property of the piezoelectric parameter g31 was taken