three-point cross 中文意思是什麼
three-point cross
解釋
三點雜交-
On the stage of describing the shape of airplane and extracting feature, we derive five - coplanar - point invariant from the basic projective invariant - cross ratio, and resolve the problem of stabilization of five - coplanar - point when there is three points are nearly collinear
在對飛機外型提取特徵進行描述的階段，首先從基本的射影不變量交比不變量出發，推導出了平面五點不量，並解決了當有三點接近共線時不變量不穩定的問題。 -
As they approached the piazza del popolo, the crowd became more dense, and above the heads of the multitude two objects were visible : the obelisk, surmounted by a cross, which marks the centre of the square, and in front of the obelisk, at the point where the three streets, del babuino, del corso, and di ripetta, meet, the two uprights of the scaffold, between which glittered the curved knife of the mandaia
當他們接近波波羅廣場的時候，人群愈來愈密了，在萬頭攢動的上空，可以看到兩樣東西，即方身尖頂的石塔，塔頂上有一個十字架，標明這是廣場的中心和聳立在石塔前面，聳立在巴布諾街，高索街，立庇得街三條路的交叉口上的斷頭臺的那兩根直柱，在這兩根直柱之間，懸掛著一把閃閃發光的彎刀。 -
And there are three parfacies - - delta plain, delta front and prodelta and eleven microfacies which are distributary channel, channel bar, marginal bank ( point bar ) and so on. the text also discuss the sedimentary characteristic and cross section structure of every microfacies
識別出三角洲平原、三角洲前緣和前三角洲3個亞相及分流河道河床、心灘、邊灘等11個微相類型，並對各微相類型的沉積特徵和剖面結構進行了討論。 -
Based on free handwriting numbers geometric structure, a way about picking up numbers eigen - value for end and its position, protruding point and its direction, three cross point ' s position, four cross point ' s position and so on, is put forward ; and number which exerts twelve paratactic bp neuron network for single number and single network, is recognized ; and regard the different scripts of a same number, which differ significantly from characteristic value, as different classification, therefore it obtains better effect
摘要基於手寫體數字的幾何結構提取端點及其方向、凸點及其方向、三叉點數和四叉點數等數字特徵值，運用單字單網的12個并行bp神經網路進行數字識別，把同一個數字特徵值差別很大的字體當不同的類別來處理，最後能達到很好的識別效果。
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