A new approach for the surface reconstruction with arbitrary topology by parametric patches fitting is presented, where the surface is divided into patches and each is reconstructed by a parametric surface.

提出了基于平方距離函數(shù)的曲面分片參數(shù)化重構(gòu)方法，實(shí)現(xiàn)了任意拓?fù)浣Y(jié)構(gòu)模型表面的參數(shù)化重構(gòu)日韩AV无码一区二区三区。

The conversion problem between rational S-patches and rational triangular Bézier patches was investigated with the reparametrization method.

采用重新參數(shù)化方法研究有理S曲面片與有理三角Bézier曲面片之間的相互轉(zhuǎn)換問題。

These patches will be the temporal reproducing locations for pioneer species that primarily consist of low-quality ruderal, and will cost some patches for high-quality fodder.

但由于先鋒種普遍為雜草類而非優(yōu)良牧草，因此這種多樣性維持只能以犧牲草甸質(zhì)量為代價(jià)毛茸茸性交。

This is the high-order primitive module, which works to tessellate high-order primitives such as N-Patches (as supported by the ATI RADEON 8500 in hardware), quintic Béziers, B-splines and rectangular and triangular patches.

高維圖元模塊的工作是處理鑲嵌高維圖元，例如N-Patche（ATI RADEON 8500提供了硬件支持）岛国片在线播放，五次貝塞爾曲線国产91大屁股熟女，B樣條及矩形與三角形的修正。

The image is segmented into a large number of small patches using toboggan algorithm on the basis of local gray value,and each of such patches is considered as a node,then the law of gravity is used to define weights between the nodes.

利用圖像的局部灰度信息進(jìn)行滑降分割小视频色网址，將圖像分割成多個(gè)小區(qū)域久视频网无码性一区；把每個(gè)小區(qū)域作為一個(gè)節(jié)點(diǎn)，采用萬有引力定律來定義各個(gè)節(jié)點(diǎn)之間的權(quán)值人人人操人人爽，利用隨機(jī)游走算法產(chǎn)生最終的分割結(jié)果淫荡AV。

The image is segmented into a large number of small patches using toboggan algorithm on the basis of local gray value,and each of such patches is considered as a node,then the law of gravity is used to define weights between the

利用圖像的局部灰度信息進(jìn)行滑降分割，將圖像分割成多個(gè)小區(qū)域黄色网站免费在线观看啊啊啊；把每個(gè)小區(qū)域作為一個(gè)節(jié)點(diǎn)亚洲欧美另类中文字幕，采用萬有引力定律來定義各個(gè)節(jié)點(diǎn)之間的權(quán)值，利用隨機(jī)游走算法產(chǎn)生最終的分割結(jié)果免费人成视频网站在。

Bieti lost its habitat continuously in recently decades associated with the extension of rangelands and farmlands, as well as firewood collection etc. The monkey live mainly in primary fir forest and the mixed conifer forest, to evaluate the status of the monkeys' habitat, we employed GIS and RS software to identify the habitat types with five Landsat TM/ETM+ satellite imagery in winter of 1986, 1992, 1997, 2001 and 2006 years respectively. The work resulted in: 1 the size of summer grazing lands, farmlands, and fir forest was 13 100 hm2, 6 400 hm2, and 30 500 hm2 in 2006 respectively; 2 during the past 20 years (1986-2006), the size of fir forest (including primary fir forest and the mixed conifer forest) decreased by 14.6%(5 200 hm2), summer grazing lands and farmlands increased by 47.2%(4 200 hm2) and 14.3％(800 hm2) respectively; and 3, during the past 20 years, the number of firry forest patches increased by 68.4%, the mean size of firry forest patches decreased by 49.3%(from 15.1 to7.6 hm2), the largest patch index of firry forest decreased 54.9%; the patch richness had no change, but the Shannon's diversity index and the Shannon's evenness index increased by 2.7% respectively.

為了評估該物種的棲息地現(xiàn)狀和變化情況草草影院www色欧美极品，我們通過野外調(diào)查工作，應(yīng)用GIS和RS技術(shù)最新婷婷99毛片精品视频，分別解譯了1986年黄色三级片地址91视频、1992年、1997年、2001年和2006年的Landsat TM/ETM+冬季衛(wèi)星影像簧网站在线观看网站永久，并對解譯結(jié)果進(jìn)行了計(jì)算和分析欧美黑大粗硬，得到了以下西藏種群棲息地的主要結(jié)果：1）現(xiàn)有暗針葉林（包括原始針葉林和針闊混交林）面積是30 500 hm2，夏季牧場面積是13 100 hm2三级A片想干就干，農(nóng)田面積是6 400 hm26080理论三级国产在线观看；2）在過去20年間（1986-2006年），暗針葉林面積減少了14.6％（5 200 hm2）91精品在线视频观看，夏季牧場面積增加了47.2％（4 200 hm2）国A无码高清，農(nóng)田面積增加了14.3％（800 hm2）；3）在過去20年間欧美特一级性爱免费看，暗針葉林的斑塊數(shù)量增加了68.4％一级A片破外女，平均斑塊面積下降了49.3％（從1986年的15.1 hm2下降到2006年的7.6 hm2），最大的斑塊指數(shù)下降了54.9％日日精品视频在观线看网站；景觀豐富度并沒有變化色爽女人免费网站，但Shannon多樣性指數(shù)和Shannon均勻度指數(shù)分別增加了2.7％。

Result The levels of sICAM1 and IL12 in skin tissue fluid were significantly higher in vitiliginous skin than that in nonvitiliginous patches in patients with common type vitiligo, whereas there was no significant difference between the two kinds of patches in patients with segmental type vitiligo.

結(jié)果：尋常型白癜風(fēng)患者局部白斑處皮膚組織液sICAM1及IL12水平較非白斑處顯著增高自拍的黄片在线视频；而節(jié)段型白癜風(fēng)白斑與非白斑處皮膚組織液sICAM1及IL12水平無顯著性差異狼友视频网址最新版。

Result The levels of sICAM-l and IL-12 in skin tissue fluid were significantly higher in vitiliginous skin than that in non-vitiliginous patches in patients with common type vitiligo, whereas there was no significant difference between the two kinds of patches in patients with segmental type vitiligo.

結(jié)果：尋常型白癜風(fēng)患者局部白斑處皮膚組織液sICAM-1及IL-12水平較非白斑處顯著增高；而節(jié)段型白癜風(fēng)白斑與非白斑處皮膚組織液sICAM-1及IL-12水平無顯著性差異亚洲日本色色。

To make a comprehensive view of metapopulation researches, we folly analyze and summarize the present concepts, theories and models of metapopulation in this paper, which primarily includes the dynamical models and simulation approaches of single and competitive metapopulations. Based on the Levin's patch occupant model, the center framework of metapopulation researches, primary principles and mechanisms are discussed. First, Levins rule: the fraction of empty patch will remain constant with habitat destruction as long as metapopulation survives. This rule implies that empty patches have determinant effects on persistence and conservation. Second. Allee effect of metapopulation is incurred by establishing difficulties and dispersal costs, which is important to the studies of reserve area and the minimum available metapopulation size. Third, we analyze the rescue effect that immigrants can reduce the extinction risk of the presented local population. Rescue effect can leads to the improvement of metapopulation sustainability and the decrease of fraction of empty patches. Fourth, the coexistence mechanism of two competing metapopulation is discussed, which suggests that competition-colonization trade off may be prevalent in competing systems. Finally, extinction debt ob tamed from coexistence mechanism is given, which depicts the lost of species richness in the future for the current habitat destruction. After theoretical discussion, we present two popular simulated approaches in metapopulations: probability transition model and stochastic process model.

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