Zobrazeno 1 - 10
of 136
pro vyhledávání: '"Zhongzhao, Zhang"'
Publikováno v:
IEEE Access, Vol 7, Pp 89594-89603 (2019)
In a conventional cognitive radio (CR) network, only when the primary user's (PU) frequency bands are sensed to be free, secondary users (SUs) can utilize these frequency band resources. Therefore, spectrum sensing (SS) can improve spectrum utilizati
Externí odkaz:
https://doaj.org/article/9c63ddb171434718bf7d6aed934b5c41
Publikováno v:
Sensors, Vol 14, Iss 1, Pp 1850-1876 (2014)
Indoor positioning systems based on the fingerprint method are widely used due to the large number of existing devices with a wide range of coverage. However, extensive positioning regions with a massive fingerprint database may cause high computatio
Externí odkaz:
https://doaj.org/article/8b68ef3c15614bd58188a2f384197a0b
Autor:
Dianzhong Chen, Xiaowei Liu, Haifeng Zhang, Hai Li, Rui Weng, Ling Li, Wanting Rong, Zhongzhao Zhang
Publikováno v:
Sensors, Vol 18, Iss 2, p 415 (2018)
Stable rotor levitation is a challenge for rotational gyroscopes (magnetically suspended gyroscopes (MSG) and electrostatically suspended gyroscopes (ESG)) with a ring- or disk-shaped rotor, which restricts further improvement of gyroscope performanc
Externí odkaz:
https://doaj.org/article/26d05f391c574680a6fe41b1d1882bc9
Publikováno v:
IEEE Access, Vol 7, Pp 89594-89603 (2019)
In a conventional cognitive radio (CR) network, only when the primary user's (PU) frequency bands are sensed to be free, secondary users (SUs) can utilize these frequency band resources. Therefore, spectrum sensing (SS) can improve spectrum utilizati
Publikováno v:
Micromachines, Vol 8, Iss 7, p 223 (2017)
Friction between contacting surfaces of metal materials restricts the application of mechanical support in the high-precision inertial device of a rotational gyroscope. Instead, a disk- or ring-shaped rotor is electrostatically or magnetically suspen
Externí odkaz:
https://doaj.org/article/30239694ed4649328327254f1b28fd67
Publikováno v:
The Scientific World Journal, Vol 2014 (2014)
Spectrum mobility as an essential issue has not been fully investigated in mobile cognitive radio networks (CRNs). In this paper, a novel support vector machine based spectrum mobility prediction (SVM-SMP) scheme is presented considering time-varying
Externí odkaz:
https://doaj.org/article/d36aba0748494317a7f977100aa4f124
Publikováno v:
In Journal of Systems Engineering and Electronics 2008 19(6):1070-1075
Autor:
Xu, Bai, Zhongzhao, Zhang
Publikováno v:
In Journal of Systems Engineering and Electronics 2008 19(5):888-892
Publikováno v:
In Journal of Systems Engineering and Electronics 2008 19(4):688-693
Publikováno v:
In Journal of Systems Engineering and Electronics 2008 19(3):447-452