Using all Chinese firms listed on the stock exchanges during 2007-2012, we examined the influence of employees＇ heterogeneity characteristics on R＆D investment. The empirical result showed that employees＇ educatio...Using all Chinese firms listed on the stock exchanges during 2007-2012, we examined the influence of employees＇ heterogeneity characteristics on R＆D investment. The empirical result showed that employees＇ educational level and R＆D investment is a significant positive correlation. We also proved the number of technical employee has a positive effect on R＆D.展开更多
To analyze the effects of heterogeneous material characteristics on rock failure,a micro-heterogeneous physical cellular automata （Mh-PCA） model is introduced according to the cellular automata theory from a general...To analyze the effects of heterogeneous material characteristics on rock failure,a micro-heterogeneous physical cellular automata （Mh-PCA） model is introduced according to the cellular automata theory from a general power view.In this model,the neighbor is the Moore pattern and the Weibull distribution is adopted to simulate the rock heterogeneousness.Using this model,the evolvements and acoustic emission of rock failure are simulated for four materials of different degree of homogeneousness （m＝1,5,10,15）.The results show that the heterogeneous characteristic has a great effect on the rock failure,the more the homogeneousness,the fewer the crack branches and the more concentrated acoustic emissions.The physical cellular automata theory gives a new idea for studying rock failure.展开更多
文摘Using all Chinese firms listed on the stock exchanges during 2007-2012, we examined the influence of employees＇ heterogeneity characteristics on R＆D investment. The empirical result showed that employees＇ educational level and R＆D investment is a significant positive correlation. We also proved the number of technical employee has a positive effect on R＆D.
文摘To analyze the effects of heterogeneous material characteristics on rock failure,a micro-heterogeneous physical cellular automata （Mh-PCA） model is introduced according to the cellular automata theory from a general power view.In this model,the neighbor is the Moore pattern and the Weibull distribution is adopted to simulate the rock heterogeneousness.Using this model,the evolvements and acoustic emission of rock failure are simulated for four materials of different degree of homogeneousness （m＝1,5,10,15）.The results show that the heterogeneous characteristic has a great effect on the rock failure,the more the homogeneousness,the fewer the crack branches and the more concentrated acoustic emissions.The physical cellular automata theory gives a new idea for studying rock failure.
