Three types of landscape boundary (forest/pepper field, forest/cabbage field,and forest/grassland) were selected in the arid valley of upper reaches of Minjiang River,southwestern China. On the basis of vegetation div...Three types of landscape boundary (forest/pepper field, forest/cabbage field,and forest/grassland) were selected in the arid valley of upper reaches of Minjiang River,southwestern China. On the basis of vegetation diversity, the depth of edge influence (DEI) ondifferent types of landscape boundaries was estimated using principal components analysis (PCA)method and moving split-window techniques (MSWT). The results showed that in the 5 transects, PCAmethod was able to detect the edge influence depth with 3 transects, while MSWT could explain 4transects. It is concluded that PCA and MSWT both can be used to detect the depth of edge influencewithin 50 m from the edge to the interior. Similar conclusions were drawn in the forest of eachtransect with the two methods, but no similar conclusions were drawn in the pepper field of eachtransect. Although the two methods have advantages and disadvantages respectively, they are usefultools for characterizing edge dynamics. Comparing the two methods, MSWT is more successful.展开更多
Diffraction enhanced imaging （DEI） with edge enhancement is suitable for the observation of weakly absorbing objects. The potential ability of the DEI was explored for displaying the microanatomy and pathology of hu...Diffraction enhanced imaging （DEI） with edge enhancement is suitable for the observation of weakly absorbing objects. The potential ability of the DEI was explored for displaying the microanatomy and pathology of human eyeball in this work. The images of surgical specimens from malignant intraocular tumor of hospitalized patients were taken using the hard X-rays from the topography station of Beamline 4W1A at Beijing Synchrotron Radiation Facility （BSRF）. The obtained radiographic images were analyzed in correlation with those of pathology. The results show that the anatomic and pathologic details of intraocular tumors in human beings can be observed clearly by DEI for the first time, with good visualization of the microscopic details of eyeball ring such as sclera, choroids and other details of intraocular organelles. And the best resolution of DEI images reaches up to the magnitude of several tens of μm. The results suggest that it is capable of exhibiting clearly the details of intraocular tumor using DEI method.展开更多
In questo lavoro viene studiata l’erpetofauna del Parco Regionale dei Colli di Bergamo,che risulta composta da 10 specie di Anfibi e 9 di Rettili. Le specie presenti sono quelle the si potrebberorilevare in zone anal...In questo lavoro viene studiata l’erpetofauna del Parco Regionale dei Colli di Bergamo,che risulta composta da 10 specie di Anfibi e 9 di Rettili. Le specie presenti sono quelle the si potrebberorilevare in zone analoghe; tra queste spiccano Bombina variegata, ormai tara in Lombardia, e Ranalatastei. L’Autore ha analizzato le categorie corologiche notando una certa preponderanza delle specieEuropee (68%), su quelle Eurocentroasiatiche (22%) e su quelle italiche (10%). Lo studio delle microco-muuità ha messo in evidenza 3 modelli fondamentali: la m. del bosco submediterraneo (con prevalenzadi Rettili), la m. degli ambienti umidi (con prevalenza di Anfibi) e la m. dei boschi umidi (specie tipicaSalamandra salamandra). Amphibians and reptiles of the Parco Regionale dei Colli di Bergamo. This article consi-ders the herpetofauna of the Parco Regionale dei Colli di Bergamo that is composed of ten speciesof Amphibians and nine of Reptiles. The species are those one would expect to find in a similar landsca-pe. Among these is relevant to mention Bombina variegata, now rare in Lombardy, and Rana latastei.The Author analyzes the corological categories noting a certain predominance of the European species(68%) on the Eurocentroasiatic (22%) and the Italic (10%) ones. The study of the microcommunitieshas evidenced three fundamental models: the m. of the submediterranean wood (with prevalence of Repti-les), the m. of the umid environments (with prevalence of Amphibians) and the m. of the damp woods(with the typical species Salamandra salamandra).展开更多
美第奇庄园坐落在罗马市中心著名的西班牙广场（Piazza di Spagna）大阶梯上“三一教堂”（Trinita dei Monti）的西侧，紧邻波尔盖希庄园（Villa Borghese）。这座庄园中有着美丽的喷泉、典雅的雕塑、精致的花园和华贵的建筑，漫步于...美第奇庄园坐落在罗马市中心著名的西班牙广场（Piazza di Spagna）大阶梯上“三一教堂”（Trinita dei Monti）的西侧，紧邻波尔盖希庄园（Villa Borghese）。这座庄园中有着美丽的喷泉、典雅的雕塑、精致的花园和华贵的建筑，漫步于花园之中，人们可以欣赏到这个永恒之城的绚丽风光。展开更多
基金This work was financially supported by the Major State Basic Research Program of China (973 Program: 2002CB111506).
文摘Three types of landscape boundary (forest/pepper field, forest/cabbage field,and forest/grassland) were selected in the arid valley of upper reaches of Minjiang River,southwestern China. On the basis of vegetation diversity, the depth of edge influence (DEI) ondifferent types of landscape boundaries was estimated using principal components analysis (PCA)method and moving split-window techniques (MSWT). The results showed that in the 5 transects, PCAmethod was able to detect the edge influence depth with 3 transects, while MSWT could explain 4transects. It is concluded that PCA and MSWT both can be used to detect the depth of edge influencewithin 50 m from the edge to the interior. Similar conclusions were drawn in the forest of eachtransect with the two methods, but no similar conclusions were drawn in the pepper field of eachtransect. Although the two methods have advantages and disadvantages respectively, they are usefultools for characterizing edge dynamics. Comparing the two methods, MSWT is more successful.
基金Supported by National Natural Science Foundation (10490195)Key Project of Chinese National Programs for Fundamental Research and Development (973 program) (2006cb500700)Natural Science and Technology Foundation of Guangdong Province(04009356,2008B030301320)
文摘Diffraction enhanced imaging （DEI） with edge enhancement is suitable for the observation of weakly absorbing objects. The potential ability of the DEI was explored for displaying the microanatomy and pathology of human eyeball in this work. The images of surgical specimens from malignant intraocular tumor of hospitalized patients were taken using the hard X-rays from the topography station of Beamline 4W1A at Beijing Synchrotron Radiation Facility （BSRF）. The obtained radiographic images were analyzed in correlation with those of pathology. The results show that the anatomic and pathologic details of intraocular tumors in human beings can be observed clearly by DEI for the first time, with good visualization of the microscopic details of eyeball ring such as sclera, choroids and other details of intraocular organelles. And the best resolution of DEI images reaches up to the magnitude of several tens of μm. The results suggest that it is capable of exhibiting clearly the details of intraocular tumor using DEI method.
文摘In questo lavoro viene studiata l’erpetofauna del Parco Regionale dei Colli di Bergamo,che risulta composta da 10 specie di Anfibi e 9 di Rettili. Le specie presenti sono quelle the si potrebberorilevare in zone analoghe; tra queste spiccano Bombina variegata, ormai tara in Lombardia, e Ranalatastei. L’Autore ha analizzato le categorie corologiche notando una certa preponderanza delle specieEuropee (68%), su quelle Eurocentroasiatiche (22%) e su quelle italiche (10%). Lo studio delle microco-muuità ha messo in evidenza 3 modelli fondamentali: la m. del bosco submediterraneo (con prevalenzadi Rettili), la m. degli ambienti umidi (con prevalenza di Anfibi) e la m. dei boschi umidi (specie tipicaSalamandra salamandra). Amphibians and reptiles of the Parco Regionale dei Colli di Bergamo. This article consi-ders the herpetofauna of the Parco Regionale dei Colli di Bergamo that is composed of ten speciesof Amphibians and nine of Reptiles. The species are those one would expect to find in a similar landsca-pe. Among these is relevant to mention Bombina variegata, now rare in Lombardy, and Rana latastei.The Author analyzes the corological categories noting a certain predominance of the European species(68%) on the Eurocentroasiatic (22%) and the Italic (10%) ones. The study of the microcommunitieshas evidenced three fundamental models: the m. of the submediterranean wood (with prevalence of Repti-les), the m. of the umid environments (with prevalence of Amphibians) and the m. of the damp woods(with the typical species Salamandra salamandra).
文摘美第奇庄园坐落在罗马市中心著名的西班牙广场（Piazza di Spagna）大阶梯上“三一教堂”（Trinita dei Monti）的西侧，紧邻波尔盖希庄园（Villa Borghese）。这座庄园中有着美丽的喷泉、典雅的雕塑、精致的花园和华贵的建筑，漫步于花园之中，人们可以欣赏到这个永恒之城的绚丽风光。
