A novel multi-view 3D face registration method based on principal axis analysis and labeled regions orientation called local orientation registration is proposed.The pre-registration is achieved by transforming the mu...A novel multi-view 3D face registration method based on principal axis analysis and labeled regions orientation called local orientation registration is proposed.The pre-registration is achieved by transforming the multi-pose models to the standard frontal model＇s reference frame using the principal axis analysis algorithm.Some significant feature regions, such as inner and outer canthus, nose tip vertices, are then located by using geometrical distribution characteristics.These regions are subsequently employed to compute the conversion parameters using the improved iterative closest point algorithm, and the optimal parameters are applied to complete the final registration.Experimental results implemented on the proper database demonstrate that the proposed method significantly outperforms others by achieving 1.249 and 1.910 mean root-mean-square measure with slight and large view variation models, respectively.展开更多
The historical biogeography ofphlebotomine sand fly taxa Hertigia, Warileya, Phlebotomus （Idiophlebotomus）, R （Spelaeophlebotomus）, P. （Anaphlebotomus）, and P. （Euphlebotomus） and the Phlebotomus （Euphleboto...The historical biogeography ofphlebotomine sand fly taxa Hertigia, Warileya, Phlebotomus （Idiophlebotomus）, R （Spelaeophlebotomus）, P. （Anaphlebotomus）, and P. （Euphlebotomus） and the Phlebotomus （Euphlebotomus） argentipes species complex was investigated using phylogenetic inference from comparative genital morphology, distribution of ancestral taxa, fossil evidence and geological age. Idiophlebotomus and Euphlebotomus occur in the Oriental region with one species from northeast Australia, whereas Anaphlebotomus occurs both in the Afro-tropical and Oriental regions. These disjunct distribution patterns across the Oriental region and the present day distribution are likely to be vicariance due to break of Gondwanaland. Fossil records, extant taxa distribution, phylogenetic analysis of the Old World Phlebotominae and paleogeography suggest that ancestors ofldiophlebotomus and Euphlebotomus originated apparently in the Cimmerian continent of northern margin of Gondwanaland in the early Permian （290 million years ago, MYA） and subsequently radiated in the Mesozoic by tectonic vicariance. The Phlebotomus argentipes species complex occurs in the South and South-east Asian countries and transmits the protozoan parasite Leishmania donovani that causes visceral leishmaniasis （Kala-azar） in India, Bangladesh and Nepal. The phylogeography ofP. argentipes was caused through vicariance followed by dispersal events from 50 MYA （the Eocene） until the Recent era.展开更多
A new species of the Drosophila obscura species group is described here, namely Drosophila glabra sp. nov. It was recently found from the Maoershan National Nature Reserve, Guangxi, China. The characteristics of the n...A new species of the Drosophila obscura species group is described here, namely Drosophila glabra sp. nov. It was recently found from the Maoershan National Nature Reserve, Guangxi, China. The characteristics of the new species are based not only on morphological characters but also on DNA sequences of the mitochondrial C0II （cytochrome c oxidase subunit II） gene.展开更多
A new species of the antlion subfamily Dendroleontinae,namely Layahima weiweii sp.nov.,is described.The new species appears to be closely related to L.wuzhishana(Yang,2002),which is herein re-described in detail.These...A new species of the antlion subfamily Dendroleontinae,namely Layahima weiweii sp.nov.,is described.The new species appears to be closely related to L.wuzhishana(Yang,2002),which is herein re-described in detail.These two closely related species are compared based on morphological and molecular data.展开更多
基金supported by the New Century Excellent Talents of China (NCET-05-0866)
文摘A novel multi-view 3D face registration method based on principal axis analysis and labeled regions orientation called local orientation registration is proposed.The pre-registration is achieved by transforming the multi-pose models to the standard frontal model＇s reference frame using the principal axis analysis algorithm.Some significant feature regions, such as inner and outer canthus, nose tip vertices, are then located by using geometrical distribution characteristics.These regions are subsequently employed to compute the conversion parameters using the improved iterative closest point algorithm, and the optimal parameters are applied to complete the final registration.Experimental results implemented on the proper database demonstrate that the proposed method significantly outperforms others by achieving 1.249 and 1.910 mean root-mean-square measure with slight and large view variation models, respectively.
文摘The historical biogeography ofphlebotomine sand fly taxa Hertigia, Warileya, Phlebotomus （Idiophlebotomus）, R （Spelaeophlebotomus）, P. （Anaphlebotomus）, and P. （Euphlebotomus） and the Phlebotomus （Euphlebotomus） argentipes species complex was investigated using phylogenetic inference from comparative genital morphology, distribution of ancestral taxa, fossil evidence and geological age. Idiophlebotomus and Euphlebotomus occur in the Oriental region with one species from northeast Australia, whereas Anaphlebotomus occurs both in the Afro-tropical and Oriental regions. These disjunct distribution patterns across the Oriental region and the present day distribution are likely to be vicariance due to break of Gondwanaland. Fossil records, extant taxa distribution, phylogenetic analysis of the Old World Phlebotominae and paleogeography suggest that ancestors ofldiophlebotomus and Euphlebotomus originated apparently in the Cimmerian continent of northern margin of Gondwanaland in the early Permian （290 million years ago, MYA） and subsequently radiated in the Mesozoic by tectonic vicariance. The Phlebotomus argentipes species complex occurs in the South and South-east Asian countries and transmits the protozoan parasite Leishmania donovani that causes visceral leishmaniasis （Kala-azar） in India, Bangladesh and Nepal. The phylogeography ofP. argentipes was caused through vicariance followed by dispersal events from 50 MYA （the Eocene） until the Recent era.
基金supported by the National Natural Science Foundation of China(31160429)the funds of the Ministry of Science and Technology of China(2011FY120200,2012FY110800)
文摘A new species of the Drosophila obscura species group is described here, namely Drosophila glabra sp. nov. It was recently found from the Maoershan National Nature Reserve, Guangxi, China. The characteristics of the new species are based not only on morphological characters but also on DNA sequences of the mitochondrial C0II （cytochrome c oxidase subunit II） gene.
文摘A new species of the antlion subfamily Dendroleontinae,namely Layahima weiweii sp.nov.,is described.The new species appears to be closely related to L.wuzhishana(Yang,2002),which is herein re-described in detail.These two closely related species are compared based on morphological and molecular data.
