Abstract: Introduced here is an approach to developing and then deploying machine learning models that addresses the drawbacks of conventional approaches. One objective of the approach described herein is to reduce or eliminate the need for manual labelling during the development process. To accomplish this, a surveillance system may implement self-supervised learning and knowledge distillation that rely on collaboration between its edge devices and a server system. Together, self-supervised learning and knowledge distillation ensure that the models deployed on those edge devices can be readily trained and then updated, as necessary, in order to improve inference quality without any human intervention.

Abstract: The present disclosure discloses a cerium-added RE-T-B-M series sintered neodymium-iron-boron magnet, which relates to the technical field of neodymium-iron-boron permanent magnets, the structure of the magnet contains a RE2Fe14B main phase, a RE-rich phase, a REFe2 phase, and a sandwich grain boundary phase, wherein the sandwich grain boundary phase includes a RE-rich phase, a Fe-rich phase, and a REFe2 phase, and in the sandwich grain boundary phase, starting from the side near the grains of RE2Fe14B main phase, the first layer is the RE-rich phase, the second layer is the Fe-rich phase, and the third layer is the REFe2 phase, where RE includes cerium element and at least one of other rare earth elements, and the cerium element accounts for 3.0-15.0% by mass of the total elements, T is iron element and cobalt element, B is boron element, and M is Al, Cu, Ga, and Ti elements.

Abstract: A method includes acquiring a plurality of sample level values of a received current frame signal; determining a current power of the current frame signal based on the plurality of sample level values; determining a current traffic signal ratio of the current frame signal based on the plurality of sample level values; taking the current power as a current pilot power of the current frame signal if it is determined that the current traffic signal ratio is less than or equal to a predetermined ratio; and determining the current pilot power of the current frame signal based on the current power, the current power floating upper limit and the current power floating lower limit if it is determined that the current traffic signal ratio is greater than the predetermined ratio. Thus, the pilot power can be accurately determined for different traffic signal ratios.