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RISS 인기검색어
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- 저자 : Gui-Fu Lu (검색결과 3 건)
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Room temperature ferromagnetism in Ni-doped ZnO films
Deng-Lu Hou,Rui-Bin Zhao,Yan-Yan Wei,Cong-Mian Zhen,Cheng-Fu Pan,Gui-De Tang 한국물리학회 2010 Current Applied Physics Vol.10 No.1
Zn1-xNixO (x = 0.02, 0.03, 0.04, 0.05, 0.07) films were prepared using magnetron sputtering. X-ray diffraction indicates that all samples have a wurtzite structure with c-axis orientation. X-ray photoelectron spectroscopy results reveal that the Ni ion is in a +2 charge state in these films. Magnetization measurements indicate that all samples have room temperature ferromagnetism. In order to elucidate the origin of the ferromagnetism, Zn0.97Ni0.03O films were grown under different atmospheric ratios of argon to oxygen. The results show that as the fraction of oxygen in the atmosphere decreases, both the saturation magnetization and the number of oxygen vacancies increase, confirming that the ferromagnetism is correlated with the oxygen vacancy level.
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A Fast Rough Mode Decision Algorithm for HEVC
Wei-Xin Yao,Dan Yang,Gui-Fu Lu,Jun Wang 한국정보처리학회 2019 Journal of information processing systems Vol.15 No.3
HEVC is the high efficiency video coding standard, which provides better coding efficiency contrasted with theother video coding standard. But at the same time the computational complexity increases drastically. Thirtyfivekinds of intra-prediction modes are defined in HEVC, while 9 kinds of intra prediction modes are definedin H.264/AVC. This paper proposes a fast rough mode decision (RMD) algorithm which adopts the smoothnessof the up-reference pixels and the left-reference pixels to decrease the computational complexity. The three stepsearch method is implemented in RMD process. The experimental results compared with HM13.0 indicate thatthe proposed algorithm can save 39.7% of the encoding time, while Bjontegaard delta bitrate (BDBR) isincreased slightly by 1.35% and Bjontegaard delta peak signal-to-noise ratio (BDPSNR) loss is negligible.
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A Fast Rough Mode Decision Algorithm for HEVC
Yao, Wei-Xin,Yang, Dan,Lu, Gui-Fu,Wang, Jun Korea Information Processing Society 2019 Journal of information processing systems Vol.15 No.3
HEVC is the high efficiency video coding standard, which provides better coding efficiency contrasted with the other video coding standard. But at the same time the computational complexity increases drastically. Thirty-five kinds of intra-prediction modes are defined in HEVC, while 9 kinds of intra prediction modes are defined in H.264/AVC. This paper proposes a fast rough mode decision (RMD) algorithm which adopts the smoothness of the up-reference pixels and the left-reference pixels to decrease the computational complexity. The three step search method is implemented in RMD process. The experimental results compared with HM13.0 indicate that the proposed algorithm can save 39.7% of the encoding time, while Bjontegaard delta bitrate (BDBR) is increased slightly by 1.35% and Bjontegaard delta peak signal-to-noise ratio (BDPSNR) loss is negligible.
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