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Emergency material allocation is the core of the emergency relief response activities. This paper focuses on the problem of emergency material allocation based on maximum material utility. First, affected areas' material demand urgency and emergency donations' effectiveness evaluation index systems are proposed based on the analysis of emergency material allocation system. Then an optimal model based...
Hard X-ray phase-contrast imaging provides high sensitivity of weakly absorbing low-Z objects in medicine, biology and materials science. The traditional viewpoint is that coherent X-rays and coherent measurements are essential to hard X-ray phase-contrast imaging. In this paper, a differential phase-contrast imaging experimental system is introduced to obtain refraction-angle images based on the...
The friction and wear problems have remarkably affected the reliability of Micro-Electro-Mechanical System (MEMS) devices. We present, for the first time, a novel integrated micro-scale closed synthetic-jet-like flow field, which provides a velocity-orientation-constant flow in an enclosure, being available as gas lubrication of the motion parts of MEMS devices to solve the friction problem. Based...
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