It is demonstrated by sociolinguistic variation studies that women are more likely than men to use standard speech. This paper reviews the operational methods and analytical means of classic quantitative studies in th...It is demonstrated by sociolinguistic variation studies that women are more likely than men to use standard speech. This paper reviews the operational methods and analytical means of classic quantitative studies in this field, intending to provide guidance and enlightenment for relevant studies and verifications in the context of Chinese culture.展开更多
Dynamical behaviors and stability properties of a flat space Friedmann-Robertson-Walker universe filled with pressureless dark matter and viscous dark energy are studied in the context of standard classical and loop q...Dynamical behaviors and stability properties of a flat space Friedmann-Robertson-Walker universe filled with pressureless dark matter and viscous dark energy are studied in the context of standard classical and loop quantum cosmology. Assuming that the dark energy has a constant bulk viscosity, it is found that the bulk viscosity effects influence only the quintessence model case leading to the existence of a viscous late time attractor solution of de- Sitter type, whereas the quantum geometry effects influence the phantom model case where the big rip singularity is removed. Moreover, our results of the Hubble parameter as a function of the redshift are in good agreement with the more recent data.展开更多
文摘It is demonstrated by sociolinguistic variation studies that women are more likely than men to use standard speech. This paper reviews the operational methods and analytical means of classic quantitative studies in this field, intending to provide guidance and enlightenment for relevant studies and verifications in the context of Chinese culture.
基金Supported by the Algerian Ministry of Education and ResearchDGRSDT
文摘Dynamical behaviors and stability properties of a flat space Friedmann-Robertson-Walker universe filled with pressureless dark matter and viscous dark energy are studied in the context of standard classical and loop quantum cosmology. Assuming that the dark energy has a constant bulk viscosity, it is found that the bulk viscosity effects influence only the quintessence model case leading to the existence of a viscous late time attractor solution of de- Sitter type, whereas the quantum geometry effects influence the phantom model case where the big rip singularity is removed. Moreover, our results of the Hubble parameter as a function of the redshift are in good agreement with the more recent data.
