Physical anti collision in RFID systems : theory and practice This book highlights the innovative applications of electromagnetics optics thermodynamics theories in creating methods for physical layer collision prevention physical anti collision in radio frequency identification (RFID) systems. Using engineering mathematical methods as the core of detection and control algorithm design it proposes semi physical verification and detection techniques to the dynamic performance testing in RFID systems. The book also introduces the methods to build semi physical hardware platforms using photoelectric sensing technology. The book provides valuable ideas to the applications of Internet of Things (IOT) systems in smart logistics car networking food traceability anti counterfeiting and other livelihood fields. It is worth reading for all researchers in IOT and optoelectronic engineering related industries.