top-bottom feature 中文意思是什麼
top-bottom feature
解釋
頂底特點-
The rule represents the tectonic evolution feature ' s controling to the depositional infilling styles and facies " distribution. in dawan area, the top and the middle strata of the shahejie formation also developed a set of fan - delta sediment similar to the bottom of the shahejie formation, but the scale is significantly smaller
本區主要發育了兩套烴源巖，即沙三中段的暗色泥巖和沙三上段的煤系地層，它們在工區的兩個主要生油窪陷?於家房子窪陷和黃沙坨窪陷都有分佈，且厚度巨大。 -
Bottom - up processing and feature detecting theory based on strong electrophysiological evidences has played a dominant role in the visual research for long time. people know top - down processing just by common sense. knowledge or experience are recalled from memory by reactivation of their neural representations and affected visual processes. however recently, researches from human and monkey provide experimental evidences for top - down processing. first, mnemonic representation of visual objects and faces, located in the ventral processing stream of visual perception in monkey, provide the best evidences of how neuronal codes are created by neurons that have the special ability to link the representations of temporally associated stimuli ; second, experiments suggest that not only bottom - up signals from the retina but also top - down signals from the prefrontal cortex can trigger the retrieval of associative codes, which may serve as a neural basis both for the conscious recall and for the visual processes affected by top - down processing further studies will improve people s understanding of the causal relation of activation and behavior by use of combined fmri and electrophysiology or lesion studies
聯想性編碼是通過學習由一些具有特殊功能的神經元建立的，這些神經元具有將時間性關聯刺激的表徵聯系起來的能力。其次，不僅來自視網膜的底-頂信號，而且來自前額葉的頂底信號都能觸發聯想性編碼的提取，既可以作為有意識回憶的神經基礎，又是頂-底加工影響視覺過程的基礎。腦損傷病人研究具有高時間解析度的人類功能性核磁共振成像functional magnetic resonance imaging ， fmri和猴fmri研究以及猴細胞電生理分析相結合，將進一步加強人們對視覺腦機制的全面理解。 -
It includes each set of " east meets west " stamp watches is packed with a leather strap and string ( top ), watch faces of " east meets west - communication and handicrafts " stamp watch set ( bottom left ) and watch faces of " east meets west - tea arts and performance " stamp watch set ( bottom right ). the chic " east meets west " stamp watch sets feature four watches in two sets designed in the shape of postage stamps
包括每套「中西文化匯聚郵票型手錶」均附送皮表帶及皮繩各一條（上圖） 、 「中西文化匯聚溝通與工藝」郵票型手錶（下圖左）及「中西文化匯聚茶道與演藝」郵票型手錶（下圖右） ，時尚的中西文化匯聚郵票型手錶分為兩套四款，手錶的外形為郵票的形狀，表面圖案復制自「 2002年香港通用郵票」系列郵票。 -
Now there are two basic target recognition strategies, such as processing from bottom to top, which is called data - driving method, and processing from top to bottom, which is called knowledge - driving method. the former begins with low layer processing for example, general segmentation, label and feature extraction, then judges whether the feature vector extracted from the labeled area is in accordance with the feature vector of the object model. the latter firstly brings forward a hypothesis on probably existed feature, secondly proceeds with purposeful segmentation, label and feature extraction, lastly judges whether the feature vector extracted from the labeled area is in accordance with the feature vector of the object model
目標識別在工農業生產、國防建設中具有極其重要的地位，目前目標識別的演算法常用的有兩種，一種是由下而上的數據驅動型策略，即不管目標屬於何種類型，一律先對原圖像進行一股性的分割、標記和特徵抽取等低層次處理，然後將每個帶標記的已分割區域的特徵矢量與目標模型相匹配；另一種是由上而下的知識驅動型策略，即先對圖像中可能存在的特徵提出假設，根據假設進行有目的地分割、標記和特徵抽取，在此基礎上與目標模型進行精確匹配。
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