N,N’-bis( n-dodecyl)-3,4: 9,10-tetracarboxyl-diimide( 1,7-H-PDI-C12) and its bay position 1,7-Br substituted derivative have been synthesized and characterized
The underwater wireless sensor network(UWSN) has the features of mobility by drifting,less beacon nodes,longer time for localization and more energy consumption
A fundamental open question in the analysis of social networks was to understand the evolution between similarity and group social ties.In general,two groups ar
In order to solve the problems of scheduling the maintenance units in the battlefield, the dynamic programming method in model construction is used; the composi