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Metamorphic testing (MT) is a property-based automated software testing method. It alleviates the oracle problem by testing programs against metamorphic relations (MRs), which are necessary properties among multiple executions of the target program. For a given problem, usually more than one MR can be identified. It is therefore of practical importance for testers to know the nature of good MRs, that...
In order to improve the reading distance of portable RFID system effectively, the relationship of tag activating distance and transmitting power of reader is particularly analyzed and proved by experiment in this paper. A method for piecewise amplifying signal is proposed by analyzing the action of consumed power of tag and the reader's minimum receiving power.
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