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Aiming at the reverse problem of UAV communication, a reverse method matching known part of priority is presented. First, excavating the frequent items of UAV communication message, to find out the fixed part of the UAV communication protocol format, Then excavating the relationship between UAV flight data detected by radar station and UAV communication data, to find one of the part of the protocol...
The model of a novel drug delivery device of gastrointestinal microcapsule in a gas pressure driving way is proposed. The model experiments have been carried out to investigate into the main factors impacting on the performance of capsule, such as ultrasonic frequency, the relationship between the quantity and reaction time of the selected reactants, the relationship between the carried drug capacity...
In the field of wireless sensor network, positioning accuracy of the sensor in a network is directly related to the method for getting of or computing the data of sensor positions. An algebraic reconstruction technique based DV-Hop location algorithms is presented in order to reduce the localization error and much consume in computation of original DV-Hop localization algorithm based on the least...
This paper investigates the noise influence on the frequency estimation performance of energy centrobaric correction method for discrete spectrum. The theoretical frequency estimation error is derived under condition that the observed signal is multiplied by a symmetrical window function. The theoretical error has been analyzed for either the right or wrong maximal spectrum line is searched. Some...
If there are multiple objects attached with RFID tags within the interrogation zone of a reader, and more than one tags send their identification messages to the reader simultaneously to response the query from the reader, the tag-tag collision would happen and no tag is identified by the reader. The tag-tag collision leads to retransmission of tag IDs which results in wastage of bandwidth and an...
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