The velocity ratio of a free shear layer has an important influence on the spatial development of the large scale coherent structures in the layer. In this study, numerical simulations are performed to get an insight ...The velocity ratio of a free shear layer has an important influence on the spatial development of the large scale coherent structures in the layer. In this study, numerical simulations are performed to get an insight into this problem. The obtained numerical results agree quite well with those of a linear inviscid stability theory and the available experimental data.展开更多
[ Objective] This study aimed to explore the effect of C/N ratio on DHA production by Schizochytrium sp. , and the results were verified by pilot-scale fermentation. [ Method] Effect of C/N ratio on DHA production by ...[ Objective] This study aimed to explore the effect of C/N ratio on DHA production by Schizochytrium sp. , and the results were verified by pilot-scale fermentation. [ Method] Effect of C/N ratio on DHA production by Schizochytrium sp. JN-3 was explored. The industrial fermentation potential of Schizochytrium sp. JN-3 was investigated by pilot-scale fermentation in a 200 L fermentation tank. [ Result] Results of fermentation in a 7 L fermentation tank showed that the maximum biomass and total lipid content were 34.3 and 20.1 g/L, respectively, when C/N ratio was 10 ; the maximum DHA yield was 46.9% when C/N ratio was 20. When pilot-scale fermentation was conducted in a 200 L fermentation tank, the biomass was 30. 2 g/L, total lipid content was 18.4 g/L, accounting for 63.2% of the dry weight of cells; DHA content was 7.4 g/L, accounting for 40. 2% of the total lipid content. [ Condasion ] Schizochytrlum sp. JN-3 has good industrial fermentation notential.展开更多
In this paper the Auerbach＇s scaling law of Hertzian fracture induced by a spherical indenter pressing on a brittle solid is studied. In the analysis, the singular integral equation method is used to analyze the frac...In this paper the Auerbach＇s scaling law of Hertzian fracture induced by a spherical indenter pressing on a brittle solid is studied. In the analysis, the singular integral equation method is used to analyze the fracture behavior of the Hertzian contact problem. The results show that the Auerbach＇s constant sensitively depends on the Poisson＇s ratio, and the effective Auerbach＇s domain is also determined for a given value of the Poisson＇s ratio.展开更多
基金Project supported by the National Natural Science Foundation of china
文摘The velocity ratio of a free shear layer has an important influence on the spatial development of the large scale coherent structures in the layer. In this study, numerical simulations are performed to get an insight into this problem. The obtained numerical results agree quite well with those of a linear inviscid stability theory and the available experimental data.
基金Supported by Research Fund for the Doctoral Program of Ministry of Education(20100093120002)Open Project of the Key Laboratory of Industrial Biotechnology under Ministry of Education(KLIB-KF200906,KLIB-KF201005)
文摘[ Objective] This study aimed to explore the effect of C/N ratio on DHA production by Schizochytrium sp. , and the results were verified by pilot-scale fermentation. [ Method] Effect of C/N ratio on DHA production by Schizochytrium sp. JN-3 was explored. The industrial fermentation potential of Schizochytrium sp. JN-3 was investigated by pilot-scale fermentation in a 200 L fermentation tank. [ Result] Results of fermentation in a 7 L fermentation tank showed that the maximum biomass and total lipid content were 34.3 and 20.1 g/L, respectively, when C/N ratio was 10 ; the maximum DHA yield was 46.9% when C/N ratio was 20. When pilot-scale fermentation was conducted in a 200 L fermentation tank, the biomass was 30. 2 g/L, total lipid content was 18.4 g/L, accounting for 63.2% of the dry weight of cells; DHA content was 7.4 g/L, accounting for 40. 2% of the total lipid content. [ Condasion ] Schizochytrlum sp. JN-3 has good industrial fermentation notential.
基金supported by the National Natural Science Foundation of China(No.10772058)
文摘In this paper the Auerbach＇s scaling law of Hertzian fracture induced by a spherical indenter pressing on a brittle solid is studied. In the analysis, the singular integral equation method is used to analyze the fracture behavior of the Hertzian contact problem. The results show that the Auerbach＇s constant sensitively depends on the Poisson＇s ratio, and the effective Auerbach＇s domain is also determined for a given value of the Poisson＇s ratio.
