Pioneering work on Sc or/and Be added Mg-Li alloys with refined grains was initiated. Various rolling-based thermo-mechanical treatments on these Mg-Li alloys were carried out. Four Mg-Li alloys were prepared by vacuu...Pioneering work on Sc or/and Be added Mg-Li alloys with refined grains was initiated. Various rolling-based thermo-mechanical treatments on these Mg-Li alloys were carried out. Four Mg-Li alloys were prepared by vacuum melting process. A unique route for producing fine grains was applied which concluded solution treatment at 350 ℃, cold rolling with 60% thickness reduction and 250 ℃ annealing, successively.展开更多
We consider the effects of the fourth generation quarks on the rare B decay processes described by the b → s（d）vv processes at the quark level. We find that the values of the branching ratios for some of these rare...We consider the effects of the fourth generation quarks on the rare B decay processes described by the b → s（d）vv processes at the quark level. We find that the values of the branching ratios for some of these rare decay processes are much larger than the standard model （SM） predictions. These processes can be used to constrain the relevant free parameters.展开更多
文摘Pioneering work on Sc or/and Be added Mg-Li alloys with refined grains was initiated. Various rolling-based thermo-mechanical treatments on these Mg-Li alloys were carried out. Four Mg-Li alloys were prepared by vacuum melting process. A unique route for producing fine grains was applied which concluded solution treatment at 350 ℃, cold rolling with 60% thickness reduction and 250 ℃ annealing, successively.
基金Supported in part by the National Natural Science Foundation of China under Grant No. 10975067the Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) under Grant No. 200801650002
文摘We consider the effects of the fourth generation quarks on the rare B decay processes described by the b → s（d）vv processes at the quark level. We find that the values of the branching ratios for some of these rare decay processes are much larger than the standard model （SM） predictions. These processes can be used to constrain the relevant free parameters.
