In this paper, micro harmonic vibration was applied to the typical titanium alloys at different frequencies to clarify their damping performance at cryogenic temperatures. The effects of vibration modulus at different frequencies were elaborately analyzed, and the crack propagation mechanism was...

Recruiting and retaining leaders and public servants at the grass-roots level in developing countries creates a potential tension between providing sufficient returns to attract talent and limiting the scope for excessive rent-seeking behavior. In China, researchers have frequently argued that...