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Geochemical characteristics of REEs and Sr, Nd isotopes of hydrothermal chimney and their geological significance in the Okinawa Trough被引量：1
《Chinese Science Bulletin》1999年第S2期148-149,共2页MENG Xianwei, CHEN Zhihua and DU Dewen First Institute of Oceanography, State Oceanic Administration, Qingdao 266003, China 
THIS note first researches the geochemical characteristics of rare earth elements （REEs） and Sr and Ndisotopes of hydrothermal chimney in the middle Okinawa Trough. On this basis, the sources of mineralforming mater...
关键词：hydrothermai CHIMNEY rare earth elements SR and Nd isotopes. 
THE RECONSTRUCTION OF q-TREES
《Chinese Science Bulletin》1988年第10期873-,共1页韩伯棠 
Let q be a positive integer. The graphs called the q-trees are defined by recursion: the smallest q-tree is the complete graph K_q with q vertices, and a q-tree with n+1 vertices where n≥q is obtained by adding a new...
关键词：INTEGER VERTEX smallest mutually arbitrarily adding KELLY 
CHROMATICITY OF q-TREES
《Chinese Science Bulletin》1987年第11期791-,共1页韩伯棠 
The graphs called q-trees are defined by recursion. The smallest q-tree is the complete graph on q vertices. A q-tree on n+1 vertices (n≥q) is obtained by adding a new vertex adjacent to each of q arbitrarily selecte...
关键词：VERTEX smallest arbitrarily pairwise adding 一宁 
LEXICOGRAPHIC GENERATION OF ROOTED TREES AND TREES
《Chinese Science Bulletin》1983年第4期448-451,共4页刘家壮 
In [1] an ordered tree is represented by a sequence of non-negative integers, and an algorithm is given to generate lexicographically all ordered trees with n vertices Now on the basis of [1] we define the representat...
关键词：REPRESENTATIVE INTEGERS ORDERED otherwise gravity INTERN grateful 邵必 习动 切二 
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