樹干形數 的英文怎麼說
中文拼音 [shùgānxíngshǔ]
樹干形數
英文
stem form factor-
Based on the field investigations and laboratory examinations, a study of the population of the epiphytic dolichomitriopsis diversformis ( mitt. ) nog. in fanjing mountain reveals that its habitats are different among different host trees, but that there lies the common habitat characteristics of not more than 2m height from the bottoms of host trees trunks, less light, high relative humidity, slow wind speed, slow evaporation speed and long time of remaining humid in middle - lower tree bark ; that it is one dioecious moss species, the morphology is remarkably different between its perichaetium and perigonium, the number of its perichaetia is much more than that of its perigonia, its perigonium is difficult to find out, its sporophyte is upright, its seta is long and thin, its capsule is regular long oval and its calyptra is cucullate
摘要通過野外調查和室內觀測對貴州省梵凈山樹附生尖葉擬船葉蘚種群的研究表明，其生境因其所附生的樹種不同而有所不同，但具有共同特點：附生在樹干下部距地面2m高的范圍之內，光照弱、濕度大、風速小、蒸發量小、中下部樹皮保持濕潤的持續時間長；其為雌雄異株蘚種，雌、雄器苞形態差異明顯，雌器苞數量多，雄器苞數量少並且難于發現，孢子體直立，蒴柄細長，孢蒴規則長卵形，蒴帽兜形。The variable parameter taper equation, which was suitable to pin us elliottii plantation form changing law, was built with the sample wood datas on the basis of the research of about form shape in the tree mensuration, one - dimensional volume table, two - dimensional volume table, one - dimensional timber - produced rate table for timber assortment, and two - dimensional timber - produced rate table for timber assortment were complied based on the above
摘要在樹干形狀研究的基礎上，利用樣木資料建立了一個適合濕地松人工林干形變化規律的可變參數削度方程，據以編制了一元材積表、二元材積表、一元材種出材率表和二元材種出材率表，這些數表經檢驗誤差較小，精度較高，可在林業生產上推廣應用。Just like that the core patch which is not adjacent to water and hilly woods has the flat edge, near round shape, high trees diversity and abundant native trees, which can reduce the external disturb and protect the native trees. in addition, the matrix in the landscape is the patch that is flat, not adjacent to water and scatter woods has low fragmentation degree, smooth edge and near ellipse shape, which is adapted to matrix
如，非鄰水山地密林團聚分佈，邊界平滑，呈圓形，樹種多樣性指數高，當地物種豐富，這種格局能顯著降低外部干擾，保護主要當地物種，與核心斑塊的功能相適應；非鄰水平地疏林斑塊邊界平滑，近橢圓形，這種格局有利於分散干擾危險，與本底斑塊的功能相適應。The contribution of this dissertation : an image retrieval approach based on dct compressed domain is proposed. first, reorder dct coefficients using multiresolution wavelet transform, then build subband energy histograms formed from reordered dct coefficients of database images, build indices of images by using morton order and order database for indexing by using variant b - tree data structure
本論文的貢獻：提出了一種將jpeg圖象的dct系數按照多解析度小波變換的形式進行重組，得到若干子帶並建立子帶能量直方圖作為特徵，在按照morton的順序建立索引，並對索引採用變形b樹數據結構組織，進行檢索的方法。分享友人