Due to differences in morphology, ecology and biology, the phylogenesis of Coniferopsida and Taxaceae remains controversial, and the phylogenetic relationship of Pseudotaxus is yet to be confirmed. Three rDNA regions,...Due to differences in morphology, ecology and biology, the phylogenesis of Coniferopsida and Taxaceae remains controversial, and the phylogenetic relationship of Pseudotaxus is yet to be confirmed. Three rDNA regions, ITS1, 5.8S rDNA, and ITS2, were prepared for 77 species belonging to seven families of Coniferopsida, including Taxaceae. Maximum parsimony(MP)and Neighbor-joining(NJ) analyses were performed. Results showed that:(1) the Coniferopsida species formed three branches:(Taxaceae, Cephalotaxaceae, Cupressaceae, Taxodiaceae),(Araucariaceae, Podocarpaceae), and(Pinaceae);(2) Taxaceae included Taxus, Pseudotaxus, Amentotaxus, and Torreya; and(3) Pseudotaxus belonged to Taxaceae, with a support rate of 97%in MP analyses and 99% in NJ analyses.展开更多
A motion filtering method is proposed in this paper, which takes into consideration the existence of certain system constraints with respect to the amount of the corrective rotational and translational motions that ca...A motion filtering method is proposed in this paper, which takes into consideration the existence of certain system constraints with respect to the amount of the corrective rotational and translational motions that can be applied on each video frame for stabilization. The interdependence between rotational and translational constraints is considered, and a constraint unscented Kalman filter （CUKF） algorithm is utilized to achieve a smoothly stabilized motion. The method is applied to stabilize each video frame, and the results reveal that the proposed approach improves the stabilization performance in comparison with the trivial approach.展开更多
文摘Due to differences in morphology, ecology and biology, the phylogenesis of Coniferopsida and Taxaceae remains controversial, and the phylogenetic relationship of Pseudotaxus is yet to be confirmed. Three rDNA regions, ITS1, 5.8S rDNA, and ITS2, were prepared for 77 species belonging to seven families of Coniferopsida, including Taxaceae. Maximum parsimony(MP)and Neighbor-joining(NJ) analyses were performed. Results showed that:(1) the Coniferopsida species formed three branches:(Taxaceae, Cephalotaxaceae, Cupressaceae, Taxodiaceae),(Araucariaceae, Podocarpaceae), and(Pinaceae);(2) Taxaceae included Taxus, Pseudotaxus, Amentotaxus, and Torreya; and(3) Pseudotaxus belonged to Taxaceae, with a support rate of 97%in MP analyses and 99% in NJ analyses.
基金Supported by the National Natural Science Foundation of China （ No. 60872123 ） and the Guangdong Provincial Natural Science Foundation （No. U0835001 ）.
文摘A motion filtering method is proposed in this paper, which takes into consideration the existence of certain system constraints with respect to the amount of the corrective rotational and translational motions that can be applied on each video frame for stabilization. The interdependence between rotational and translational constraints is considered, and a constraint unscented Kalman filter （CUKF） algorithm is utilized to achieve a smoothly stabilized motion. The method is applied to stabilize each video frame, and the results reveal that the proposed approach improves the stabilization performance in comparison with the trivial approach.
