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Random fiber laser (RFL) utilizing stimulated Raman scattering and distributed random Rayleigh backscattering in fiber as optical gain and feedback mechanisms, respectively, has been developed rapidly in the past decade. Here, it is found, for the first time, that the combination of a high‐order pump and new transmission fiberthat has lower transmission loss, Rayleigh backscattering coefficient, and...
Walking is one of the most common and simple methods of fitness, and the best way of fitness may be walking in the 21st century. Pedestrian space, as one kind of public resources, provides a pedestrian's access way as well as an important public space, therefore fitness walking should be taken into full account in the planning and design from aspects such as paving material, air quality, micro-climate,...
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