The pure titanium(TA2),Ti6Al4V,Ti6Al7Nb treated by ammonia gas (NH3) plasma immersion ion implantation-deposition (PIII-D) is investigated.On a torsional fretting wear test rig,the torsional fretting
Nanocomposite Cr-W-B-N coatings with various tungsten contents were synthesized on silicon wafer substrates.The used technique is a DC reactive magnetron co-sputtering deposition equipped with a Cr-B
Bulk-loading of spatial data is the process of constructing a spatial index from scratch.Due to the large size and complexity of spatial data,parallel bulk-loading of spatial data has the shortage tha
How to organize crossing social network resources on a higher level of integration and address them to users’ desktops is an important and difficult problem.Especially,there is lack of efficient appro
Many complex networks exhibit a scale-free,power-law distribution of vertex degrees.This common feature is a consequence of two generic mechanisms relating to the formation of real networks: (i) netwo