Stability of a hot two-temperature accretion disc with advection

The effects of radial advection and thermal diffusion were considered in investigating the linear stability of an optically thin, two-temperature accretion disc. If the disc has only very little advection, we proved that the thermal instability exists when the disc is geometrically thin. But it dispears in a geometrically slim disc if the thermal diffusion was considered. Moreover, if the disc is advection dominated, the thermal instability does not exist. In addition, we found that the instabilities of inertial-acoustic modes exist only in a geometrically thin disc or an advection-dominated disc with low Mach number, whereas the Lightman & Eardley viscous instability always dispears in a two-temperature disc. A simple comparison also showed that an optically thin, bremsstrahlung cooling dominated disc is generally more thermally unstable than a two-temperature disc if it is not advection-dominated.Comment: 12 pages, LaTeX file, 3 figures, accepted for publication in MNRAS. Revised with a few important references added and several inaccurate references correcte

Analysis of Talent Cultivation Methods for Digital Commerce Professional Groups

With the advent of the digital economy era, business education is also facing new challenges and opportunities. The digital commerce professional group, as a new educational concept and carrier, provides new ideas for the integration and exchange of various business majors in vocational education. In this digital and intelligent era, commercial activities are no longer limited to the traditional real economy, but increasingly rely on digital technology and internet platforms. Therefore, cultivating talents with professional knowledge and skills in digital commerce has become an urgent task in business education. This article mainly analyzes the methods of cultivating talents in the digital commerce professional group

Research on the Construction of Digital Commerce Professional Group from the Perspective of Dual Collaborative Education

This study explores the importance of building a digital commerce professional group from the perspective of dual collaborative education. By strengthening interdisciplinary cooperation, continuously updating teaching resources, and improving talent training and evaluation systems, students can broaden their disciplinary horizons, master knowledge and skills in multiple fields, which helps to improve their overall quality and competitiveness, cultivate innovation and teamwork abilities. This is of great significance for the development of digital commerce professional groups and talent cultivation