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With the increasing popularity and wide application of embedded systems as well as the recently frequent emergence of incidents of food safety, the PDA + RFID finds its rapid development and widespread application in the aspects of quality traceability. The United States and Europe take the lead in this application are,and In Beijing and Shanghai, RFID system has been used experimentally to realize...
Along with the gradual popularity of various palmtop calculation devices, mobile education gains universal attention. According to the relationship between device and network, we classify mobile education into three categories: permanently online, frequently online and offline. Considering the current condition of network environment in primary and secondary school, as well as the general requirement...
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