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index of similarity
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  相似性指数
     By using Whittaker's index of similarity I= 1-0.5∑ |ai-bi| as clustering index, 18 species of 5 families were classfied into 8 communities:
     应用Whit-taker相似性指数I=1-0.5∑|ai-bi| 作为聚类指标,初步将17个样地内所获5科18种啮齿动物划分为8个群落。 经与相关系数的聚类结果比较,认为前者更能反映该段啮齿动物的组成特点和群落结构特征。
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  “index of similarity”译为未确定词的双语例句
     8. 8a there is high index of similarity, but they are very far from 2, 4, 5, 8b onthe basis of percentage of each zymogramatic peak area with the scanning chromatograms.
     而2、4、5、8b的相似性度指数较低,它们之间的亲缘关系较远。
短句来源
     The result of this experiment showed the fact as follow: thewith-population index of similarity of Fo, Sn, En and Eo calculated fromRAPD fingerprints were respectively 0.853,0.706,0.592 and 0.667.Thebetween-population index of genetic distance of them were that Fo and Sn was
     结果表明:83淡奥利亚、78沙尼罗、99埃及尼罗、99埃及奥利亚四种罗非鱼种内相似系数分别为0.853、0.706、0.592、0.667; 83淡奥利亚与78沙尼罗、99埃及尼罗及99埃及奥利亚群体间遗传距离分别为0.577、0.450、
短句来源
     (4) Comparison of Peking flora with adjacent regions. By means of the same procedure, the index of similarity shows that, firstly, the ligneous flora of Peking are more closely related to North-east China (0.7).
     4.北京地区与邻近地区植物区系的比较:根据北京木本植物区系与东北、山东、泰山、河南、苏南等地区的木本植物相似性指标可以看出,北京区系与东北区系的相似性最大(0.7),并指出很多华北成分与东北南部共通。
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     and 57 family, 80 genera and 85 species for the summer cotton/wheat. Index of similarity between the single cotton and spring cotton/wheat was 0.6830>0.5598 (between the spring cotton/wheat and summer cotton/wheat)>0.4152 (between the single cotton and summer cotton/wheat).
     平作春棉和麦套春棉间节肢动物群落的相似系数(0.6830)>麦套春棉和麦套夏棉(0.5598)>平作春棉和麦套夏棉(0.4125)。
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     The simple matching coefficients(SMCs) was applied as the index of similarity in hierarchical cluster analysis of fifteen in vitro prescreening tests for developmental toxicants.
     以简单配比系数为相似性指标对15种发育毒物体外筛选试验进行指标型系统聚类分析。
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  相似匹配句对
     index;
     指标;
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     Index
     索引
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     regulatinn of "index" task;
     “指标”任务的规定;
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     Calculation of Cost Index
     运输飞行成本指数计算
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     RECURSIVE SIMILARITY
     递归相似
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  index of similarity
RAPD markers (index of similarity) also showed a greater genetic distance of accession 4181 from the other three accessions of A.
      
Our tests are a natural extension of those based on Jaccard's index of similarity.
      
The perception of vowels was studied in chimpanzees and humans, using a reaction time task in which reaction times for discrimination of vowels were taken as an index of similarity between vowels.
      
The unrotated factor matrices from the three different age groups were then compared using orthogonal Procrustes rotation to maximize congruence, and Tucker's coefficient of congruence was used as index of similarity.
      
The perception of consonants which were followed by the vowel [a] was studied in chimpanzees and humans, using a reaction time task in which reaction times for discrimination of syllables were taken as an index of similarity between consonants.
      
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Based on the statistical analysis of families, genera and species and comparison of related regions, the flora of Peking has been preliminarily analized by present authors in following aspects. 1. The elements of Peking flora. (1) Statistical analysis of femilies, genera and species. a) According to the enumeration of "The Peking Flora" the vascular plants of Peking are belonging to 153 fatuities, 751 genera and 1025 species. b) Analysis of major families. Among Angiosperms 10 leading families are taken for...

Based on the statistical analysis of families, genera and species and comparison of related regions, the flora of Peking has been preliminarily analized by present authors in following aspects. 1. The elements of Peking flora. (1) Statistical analysis of femilies, genera and species. a) According to the enumeration of "The Peking Flora" the vascular plants of Peking are belonging to 153 fatuities, 751 genera and 1025 species. b) Analysis of major families. Among Angiosperms 10 leading families are taken for accounting percentage of their number of species as follows: Compositae, 10% Gramineae, 9% Leguminosae, 6% Rosaceae, 6% Liliaceae, 4% Cyperaceae, 4% Umbelliferae, 3.8% Ranunculaceae, 3.6% Cruciferae, 2% Caryophyllaceae, 2% c) Statistics of ligneous plants. Woody plants exclusive of the cultivated ones there are 45 families, 96 genera and 199 species; that is about 29% to the total number of vascular plants. (2) The endemics: The endemics are not strictly restricted to the Peking area, they are also generally found in North China. Accooding to the records and specimens collected there are about 7 spp. which may be considered as endemics, such as Clematis acerifolia Maxim. in Paihuashan and Shangfangshan; Cnidium Smithii (Wolff) W. T. Wang in Paihuashan and Yangjaping) Ligusticum Wawrae Wolff in Chiehtai Sze of Mentougou. Besides, there are about 25 spp. which are distributed correspondingly to the mountain range of North China, as Xanthoceras sorbifolia Bge., a monotypie genera occurs almost over North China. (3) The comparison between flora of major regions in Peking: In order to define the floristie characters of different regions of Peking, the authors select Potou, Paihuashan, Kingshan, Shangfangshan, Tancheh Sze and Haitien as 6 major points to make some comparison. According to thedistribution of woody plants in different regions an index of similarity is obtained by calculation and comparison. From Table (1) it shows that the flora of hilly region is more similar to that of the plain (index number=0.75) , and that of Potou and Paihuashan is also closely related (0.77), but the fora of rugged mountainous regions and plain are quite different. Among the 6 regions, hence, there is difference not only between the abundance of spp., but also the composition concerned. (4) Comparison of Peking flora with adjacent regions. By means of the same procedure, the index of similarity shows that, firstly, the ligneous flora of Peking are more closely related to North-east China (0.7). Secondly, it also has intimate relation with the flora of Honan Province, but in the latter nu merous Mid-China elememts are interfused. Thirdly, there are some distinct differences between flora of Peking and Sonthern part of Kiangsu Province. Lastly, the Peking flora appears to have loose relation with flora of Shantung Province and its relation with loes plateau ia also concerned. As stated above, this material seems to have some value of reference as a criterion in dividing the North China flora into provinces and snb-provinces. (5) Monotypic genera: Among the 10 monotypic genera in Peking flora recorded by Bunge (1833) only 4 are recognized as really monotypic at present, they are Xanthoceras, Oresttrophe, Hernistepta, Anemarrhena. (6) The transitional characters of elements of Peking flora: Due to its geographical and geological situation Peking flora has its European-Sibiria elements and Northeast China dements as the southern border, and on the contrary, some elements of tropical origin meet their north bonder just within this area. 2. Origin of Peking flora and its division. By the analysis stated above, it shows that Peking flora is practically as a part of North China flora. In Peking flora there are numerous elements as the relics of Tertiary flora, meanwhile*some migrating elements from other regions are also present, especially in plain. Elements of tropical origin as components of Peking flora indicate that they were either as remnants of tropical climate during geological time or as migrants after glaciation. For the furfher division of Peking flora, extensive work should be done to give a real prospect. It is difficult to define those limitations at present. However, it is evident to note that flora of rugged mountainous region, low hilly rigion and plain are very different, flora of western part and eastern part of rugged mountainous region are also quite unlike; this seems as an useful reference for floristic division of Peking area.

一、北京的植物区系成分 1.科、属、种的统计和分析。 (1) 区系统计:根据“北京植物志”记载,北京共有维管束植物153科、75属、1025种。 (2) 主要科的分析;被子植物中10个主要科依次为: 菊科(Compositae),10%禾本科(Gramineae),9%豆科(Leguminosae),6%蔷薇科(Rosaceae),6%百合科(Liliaceae),4%莎草科(Cyperaceae),4%繖形科(Umbelliferae),3.8%毛茛科(Ranunculaceae),3.6%十字花科(Cruciferae),2%石竹科(Caryophyllaceae),2% (3) 木本植物统计:共有自生木本植物45科、96属、199种,豹占维管束植物的总数的19%,属的总数的13%弱。 2.特有植物:北京特有植物多与华北区系共有,根据标本与记载可以作为北京特有种的共7—9种,如槭叶铁线莲(Clematis acerifolia Maxim.)产于百花山、上方山,北京蛇床(cnidium Smithii(Wolff)W.T.Wang)特产于百花山、杨家坪,北京当归(Ligusticum Wawrae Wol...

一、北京的植物区系成分 1.科、属、种的统计和分析。 (1) 区系统计:根据“北京植物志”记载,北京共有维管束植物153科、75属、1025种。 (2) 主要科的分析;被子植物中10个主要科依次为: 菊科(Compositae),10%禾本科(Gramineae),9%豆科(Leguminosae),6%蔷薇科(Rosaceae),6%百合科(Liliaceae),4%莎草科(Cyperaceae),4%繖形科(Umbelliferae),3.8%毛茛科(Ranunculaceae),3.6%十字花科(Cruciferae),2%石竹科(Caryophyllaceae),2% (3) 木本植物统计:共有自生木本植物45科、96属、199种,豹占维管束植物的总数的19%,属的总数的13%弱。 2.特有植物:北京特有植物多与华北区系共有,根据标本与记载可以作为北京特有种的共7—9种,如槭叶铁线莲(Clematis acerifolia Maxim.)产于百花山、上方山,北京蛇床(cnidium Smithii(Wolff)W.T.Wang)特产于百花山、杨家坪,北京当归(Ligusticum Wawrae Wolff)特产于门头沟的戒台寺,此外与华北共有的特有种约20余种,如文冠果(Xanthoceras sorbifolia Bge.)。 3.北京市各主要地区植物区系的比较,为了确定北京各地区区系特点,选择坡头、百花山、金山、上方山、潭柘寺和海淀区进行了区系统计,并根据木本植物的分布求出各地区之间的相似性的指标,结果表明低山区与平原区的区系最为亲近(0.75以上);坡头和百花山之间的关系也很紧密(0.77),而深山区与平原区的区系有显著的区别。区系统计方面,6个地区不但种的丰富程度和主要科的比重各有不同,种类成分也有差異。 4.北京地区与邻近地区植物区系的比较:根据北京木本植物区系与东北、山东、泰山、河南、苏南等地区的木本植物相似性指标可以看出,北京区系与东北区系的相似性最大(0.7),并指出很多华北成分与东北南部共通。次为河南(0.67),但河南南部有大量华中成分侵入,形成显著的区别,而和苏南以及山东半岛区系的差别比较明显。此外,指出北京区系与山东区系的关系较为疏远,也指出了北京区系与黄土高原区系的联系,这些材料对划分华北区系中省和亚省的范围有一定参考价值。 5.单种属:1883年Bunge描述的10个单种属尚有4种是单种属,即独根草属(Oresitrophe)、文冠果属(Xanthoceras)、泥胡菜属(Hamistepta)和知母属(Anemarrhena)。 6.北京植物区系的过渡性:北京地区处于华北植物省的边缘,成为欧洲——西伯利亚植物区系和我国东北地区区系分布的南界,而是热带超缘科属分布的北界,后者共28科,约30属以上。二、关于区系超源和区划根据以上分析可以看出北京植物区系实际上是华北植物区系的一部分,很多特有种和华北区是共同的,表明北京区系的形成和发展与华北及东北南部区系形成和发展是一致的。北京区系及华北区系中既有大量的第三纪植物区系的残遗,也有不少迁移而来的区系成分,在平原低山区更为显著。不少是有热带亲缘科属及其中华北特有属的存在说明可能有部分植物是在地史上的热带气候下产生而残留至今,或是冰期后重新迁移而来的。在区系区划方面,很多调查工作还待进行,尚难确定各小区的界限。但从北京各地区的自然地理条件、区系特点和植被特点的比较来看,深山区和平原低山丘陵区的差别显著,东部深山区和西部深山区有所不同,平原区和低山区也有一定的差别,又各有一定的特有种,都可作为区系区划的参考。

The present paper deals with the secondary forest vegetation after 20years period of natural regeneration. The field study was carried out on Mt.Wuchao near Hangzhou, Zhejiang Province. According to Jaccard’s community index of similarity, the secondaryvegetation was divided into three types:the deciduous mixed forest, theevergreen mixed forest-a sere towards a higher stage of evergreen broad-leafclimax community, and intermediate type. The life forms were according toRaunkiaer’s classification:phaenerophyta...

The present paper deals with the secondary forest vegetation after 20years period of natural regeneration. The field study was carried out on Mt.Wuchao near Hangzhou, Zhejiang Province. According to Jaccard’s community index of similarity, the secondaryvegetation was divided into three types:the deciduous mixed forest, theevergreen mixed forest-a sere towards a higher stage of evergreen broad-leafclimax community, and intermediate type. The life forms were according toRaunkiaer’s classification:phaenerophyta (74.4%), chamaephyta (13.5%),hemicryptophyta (4.1%), geophyta (6.8%), and therophyta (1.4%). The highpercentage of phaenerophyta is similar to the life form spectrum of theevergreen broad-leaf forest of Zhejiang Province. The leaf size of thevegetation was mainly microphylla (60.3%) but which is higher than those ofthe evergreen broad-leaf forest in other place of the province. 82.5% of theleaf pattern was simple leaf. The recovery vegetation stratification weredivided into:arborous layer, shrub layer, herbaceous layer and ground layer. According to Lutz’s phytograph index the most important tree specieswere:Lithocarpus glaber, Cyclobalanopsis glauca, and Quercus glandulifera var.brevipetiolata in which density, frequency, cross-sectional area and itsappearence in the under and over story were predominant. Next is Castanopsisfargesii, Castanopsis sclerophylla and Schima superba. The recovery forest has a growing-stock of 50m~3 per hectare, the highestis found to be above 140m~3 per hectare. A total of 62 species of spermatophyta in 27 families and 45 genera wasobserved in the field during the study period and a comparison of its floraand geographical distribution was carried out.

本文是对午潮山森林植被遭破坏后,经过20年的封山育林,植被在恢复过程中的群落学研究。按Jaccard植物群落相似性系数统计,植被可分三个类型:以落叶树种在数量上占优势的混交林;以常绿植物的种类在数量上占优势的混交林;处于二者之间或处于恢复演替过程中的更高阶段。按Raunkiaer生活型谱统计:高位芽植物占74.4%,地上芽植物占13.5%,地面芽植物占4.1%,地下芽植物占6.8%,一年生植物占1.4%,与本省常绿阔叶林的生活型谱有些相似,都是以高位芽植物占优势。叶的性质以小型叶为主,占60.3%,只是微型叶的比例较本省其它各地高。叶型以单叶比例最大,占82.5%,群落在结构上可分乔木层,灌木层,草本层和地被层,亦有数量不多的层间植物,乔木层一般还没有出现层的分化。按Lutz林木结构图解统计表明:石栎、青冈、枹树它们在密度、频度、断面积和上下层中的出现率方面都占优势,是群落中的优势种,其次是丝栗栲、苦槠、木荷。恢复的幼林每公顷蓄积量都在50立方米以上,最高的可达140多立方米。出现的种子植物计有62种,隶属27科45属,文中对这些植物的区系地理成分进行了分析比较。

The Ahermatypic corals collected in two comprehensive investigations of the East China Sea continental shelf during October to November 1977 and September to October 1978 were divided into three communities using mathematical statisticmethod and indices of similarity and the relations between the distribution of the deep-sea corals and the environmental factors such as sedementary types and environments, water depth and temperature were analysed.

本文对1977—1978年两次东海大陆架综合调查中所获的深水石珊瑚,应用数理统计方法的相似性指数公式,将它们分为三个群落。同时对深水石珊瑚的分布与底质(沉积类型和沉积环境)、水深、温度等环境因素之间的关系作了分析。

 
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