这些天来，随着他们走动时，需要跟踪其位置。Though best known in smartphone applications, particularly in terms of GPS and now the onset of indoor location, it’s making its way into a wide variety of other devices—from wireless toys to consumer drones, from keychains that want to be found to shopping carts tracked around a store. Buzzwords used to describe these devices include Internet of Things, wearable-computing smart devices, smart-home devices, connected appliances, and others. The common element among them all is the desire to track their position...
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