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This paper aims to reveal the cavitation characteristics of three oil wedges sleeve bearing and set the theoretical and experimental basis for defining the oil film boundary condition.

Computational fluid dynamics model of three oil wedges sleeve bearings based on the Navier–Stokes equation is set using Fluent considering turbulent situation and two-phase flow theory. The cavitation characteristics of bearing is investigated by taking pictures of experiment.

The rupture region of oil film and the contours of air volume fraction increase distinctly with the increase of rotating speed and the decrease of input pressure. The critical rotating speed of cavitation occurrence and oil film pressure increases with the increase of input pressure. The change trend of experiment cavitation with the rotating speed and input pressure is consistent with theoretical cavitation in general.

The finite element model of three oil wedges sleeve bearings is established based on the Navier-Stokes calculation equation of the fluid, two-phase flow theory and turbulent model. Sleeve bearing is transparent, the pictures of cavitation can be easily taken by high-speed camera, the cavitation characteristics of bearing is studied by experiment. The cavitation performance of three oil wedges bearings is studied with the change of input pressure and rotating speed, the change trend is basically consistent for theory and experiment. The study on critical rotating speed of cavitation occurrence is benefit for defining the oil film boundary condition.

This paper aims to focus on how political resources and their correlation with business models affected the headquarters location decision making of successful private enterprises established in small cities.

The paper constructed a research model which included political resources and a business model as contributing factors; selected eight companies as the research object; and used cross‐case study method to explore the function of political resources and a business model to the headquarters location decision of private enterprises.

The special political environment during China's economic transformation created substantially different political resources between different regions and governments at different levels, which forced private enterprises to relocate their headquarters in order to chase political resources conveniently. The relevance of a business model and political resources determined the significantly different ways that private enterprises obtained political resources: enterprises which were highly dependent on local political resources found it difficult to make a decision regarding corporate headquarters relocation; those enterprises with a high political resources optimization capability would be driven by the pursuit of political resources to make their headquarters relocation decision; those enterprises with an inconspicuous connection between political resources and a business model would rather be “hermits” in a metropolis and relocate their headquarters.

This paper's research results would be conducive to further study of private enterprises' headquarters location decision making during China's economic transformation.

The paper indicates the importance of political resources and the relevance of corporate business models to the headquarters location decision of private enterprises; the paper further makes clear the status of political resources as an important factor in location theory.