By analyzing the measured corrugation data, cause of rail was discussed theoretically. Then, vehicle-track coupling model used to study stick-slip characteristics wheel-rail system. Finally, explained by combining modal analysis and relation. The transverse curve on inner rail-inner wheel leading wheelset presents a negative slope characteristic, which makes easy slide surface aggravates wear r...

Abstract Marine buoys, as the nodes of marine monitoring system, play a vital role in activities, which can collect hydro-meteorological information for scientific research, offshore oil development, and construction ports. However, sustainable cost-effective power supply buoys equipped with electrical devices is still challenge. In this paper, corrugation-like triboelectric nanogenerator (C-TE...

recently, bulk nano-structured materials produced by severe plastic deformation (spd) have attracted scientists attention.  materials produced by spd are of great importance because of (1) non-porous structure, (2) great mechanical properties such as high strength and toughness and (3) proper dimension for mechanical and physical testing.  several methods have been introduced for imposing the s...

BACKGROUND Vasospasm is a serious complication associated with subarachnoid hemorrhage. Successful management of vasospasm will ultimately depend on a clear understanding of the scope of this phenomenon, including whether arterial elements of different calibers are equally affected. We therefore examined the responses to subarachnoid hemorrhage in rabbit basilar arteries, small pial arteries, a...

In this study, the spanwise and chordwise bending stiffness EI of honeybee forewings were measured by a cantilevered bending test. The test results indicate that the spanwise EI of the forewing is two orders of magnitude larger than the chordwise EI Three structural aspects result in this span-chordwise bending anisotropy: the distribution of resilin patches, the corrugation along the span and ...