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Decoupling the electric conductivity, Seebeck coefficient, and thermal conductivity is a core issue to improve the properties of thermoelectric materials by tuning the electron and phonon transport properties. Herein, Bi2Te2.7Se0.3/Bi2S3 heterostructure is successfully synthesized by a simple anion exchange method with Bi2Te2.7Se0.3 as the starting material. The Bi2Te2.7Se0.3/Bi2S3 heterointerfaces...
More and more objects can be identified and sensed with RFID tags. Existing schemes for 2D indoor localization have achieved impressing accuracy. In this paper we propose an accurate 3D localization scheme for objects. Our scheme leverages spatial domain phase difference to estimate the height of objects which is inspired by the phase-based Interferometric Synthetic Aperture Radar (InSAR) height determination...
Radio Frequency Identification (RFID) has been widely used in many application domains. However, current indoor positioning systems are lack of accuracy due to the interference of multi-path and other factors. In this paper, a differential based hologram localization method has been proposed to improve the indoor positioning system accuracy. A differential hologram is calculated to locate target based...
With the development of communication technology and the rapid augment in data and multimedia services, the demand for indoor localization is increasing. Radio Frequency Identification (RFID) based real time localization system is an effective positioning system. However, due to the complex multi-path interference of indoor environment, most of the localization methods are lack of positioning accuracy...
Radio Frequency IDentification (RFID) system has been wildly used in recent ten years. A Handhold reader and some passive tags compose an efficient system for retail scenarios, such as storage management and item inventory. However, the heavily energy consumption of the reader battery, which due to the frequent tag collisions, is a main limitation for such a RFID system in large scale item-level scenario...
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