[2] [2] VASANTHI M S,RAO T R,PRASAD M A.Radio frequency transceiver architecture energy efficiency analysis for wireless sensor communications［J］.Journal of Circuits,Systems and Computers,2015,24(2):117-126.

[3] [3] HU C,YOUN B D,WANG P,et al.Ensemble of data-driven prognostic algorithms for robust prediction of remaining useful life［J］.Reliability Engineering & System Safety,2012,43(15):29-39.

[7] [7] BASAGNI S,PETRIOLI C,SPENZA D.CTP-WUR:The collection tree protocol in wake-up radio WSNs for critical applications［C］//Hawaii,USA:2016 International Conference on Computing,Networking and Communications(ICNC),2016.

[10] [10] BERIAIN A,SOLAR H,BERENGUER R,et al.A very low power 7.9 bit MEMS pressure sensor suitable for batteryless RFID applications［C］//Texas,USA:2014 IEEE 57th International Midwest Symposium on Circuits and Systems(MWSCAS),2014:102-111.

[12] [12] MARTINCIC F,SCHWIEBERT L.Introduction to wireless sensor networking［M］.New York:Springer,2015.

[13] [13] SOUALHI A,MEDJAHER K,ZERHOUNI N.Bearing health monitoring based on Hilbert-Huang transform,support vector machine,and regression［J］.IEEE Transactions on Instrumentation and Measurement,2015,64(1):52-62.