The low-lying states of a spin-aligned 6-electron quantum dot may prefer the regular hexagon and regular centered pentagon structures.However,these favourable structures may be prohibited by inherent symmetry.Based on...The low-lying states of a spin-aligned 6-electron quantum dot may prefer the regular hexagon and regular centered pentagon structures.However,these favourable structures may be prohibited by inherent symmetry.Based on this consideration,a couple of equations are deduced.The solution of these equations gives exactly the magic numbers of the 6-electron dot.展开更多
The shape of directed lattice animals is studied by introducing a new exponent,v_(F),discribing the divergence of the front width of the animal clusters.In two dimensions,the results from exact enumerations and real-s...The shape of directed lattice animals is studied by introducing a new exponent,v_(F),discribing the divergence of the front width of the animal clusters.In two dimensions,the results from exact enumerations and real-space renormalization group method suggest that v_(F)=0.43±0.03.展开更多
Immigration issue is one of the major problems in China today.The implementation of disasterinduced immigration policy is a significant contributor to effectively promote targeted measures of helping people in contigu...Immigration issue is one of the major problems in China today.The implementation of disasterinduced immigration policy is a significant contributor to effectively promote targeted measures of helping people in contiguous poor areas with particular difficulties to be out of poverty.Empirical investigation has been conducted to get a systematic grasp of the implementation deviation of massive disaster-induced immigration phenomenon in southern Shaanxi area.According to the survey,phenomenon of "immigrate the rich,while abandoning the poor,more houses with fewer immigrants,four moves and four drops,poor spot choosing and relaxed project management" demands improvement of execution ability.The implementation of such public policy has a large space to improve.Enough attention should be paid to the negative impact of such deviation,and only in this way can we live up to the desired objectives.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19374073 and Grant No.19134020Guangdong Natural Science Foundation.
文摘The low-lying states of a spin-aligned 6-electron quantum dot may prefer the regular hexagon and regular centered pentagon structures.However,these favourable structures may be prohibited by inherent symmetry.Based on this consideration,a couple of equations are deduced.The solution of these equations gives exactly the magic numbers of the 6-electron dot.
文摘The shape of directed lattice animals is studied by introducing a new exponent,v_(F),discribing the divergence of the front width of the animal clusters.In two dimensions,the results from exact enumerations and real-space renormalization group method suggest that v_(F)=0.43±0.03.
基金supported by the National Social Science Fond of China(Grant No.13XSH031)Shaanxi Key Theoretical & Realistic Projects of Social Science Research Foundation(Grant No.2015Z023)+1 种基金Shaanxi Agricultural Collaborative Innovation and Promotion Alliance Foundation(Grant No.LM2015015)the Fundamental Research Funds for the Central Universities(Grant No.2013RWYB09)
文摘Immigration issue is one of the major problems in China today.The implementation of disasterinduced immigration policy is a significant contributor to effectively promote targeted measures of helping people in contiguous poor areas with particular difficulties to be out of poverty.Empirical investigation has been conducted to get a systematic grasp of the implementation deviation of massive disaster-induced immigration phenomenon in southern Shaanxi area.According to the survey,phenomenon of "immigrate the rich,while abandoning the poor,more houses with fewer immigrants,four moves and four drops,poor spot choosing and relaxed project management" demands improvement of execution ability.The implementation of such public policy has a large space to improve.Enough attention should be paid to the negative impact of such deviation,and only in this way can we live up to the desired objectives.
