A multi-hop free space optical link based on all-optical relays is presented.All-optical relays are either composed of simple optical amplifiers or optical regenerators.It has been CE Health shown that after a certain number of hops, the amplifier based relay cannot extend the range of the free space optical link.Therefore, we have investigated the
By collecting the ripple current in the control coil, the self-sensing magnetic bearings can obtain rotor displacement information without a displacement sensor, which has the advantages of low cost and high integration.According to the problems of incomplete and inaccurate displacement information extraction caused by the traditional displacement
The rapid advancement of urbanization in China has exacerbated the contraction of many rural populations and as a result, the abandonment of many traditional dwellings.Therefore, the aim of this study was to properly analyze the deterioration of vacant traditional dwellings and propose ways to intervene and gradually solve the problem of vacant hou