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Chinese translation for "dcca"

二氯异氰脲酸
Example Sentences:
1.So if dca combines with classified methods , the ordination effect on samples and species is better than that of dcca and cca . 2 . fso study on plant communities : we applly fuzzy set ordination ( fso ) to analyze the environmental factors and vegetation data
植物群落的模糊数学排序研究:运用模糊数学排序对样地的环境因子和植被数据进行了直接梯度分析,结合twinspan分类结果,与dcca比较,模糊数学排序直观的得出了环境因子和植物群落间的关系,分辨率较高。
2.1 . study on classifying and ordination of plant communities : acording to the ecological relationship between plant species , plant communities and environment , we study the communities types , structure and distributing pattern of midland of taihang mountain by using twinspan , dca , cca , dcca and so on
植物群落的分类和排序研究:应用twinspan分类和dca 、 cca 、 dcca等方法,从植物种、植物群落与环境的生态关系方面,研究了太行山中段各群落类型、结构及分布格局。
3.By using of the richness , diversity and evenness indices , combined with twinspan , dca , dcca , multi - factors regression , correlation analysis techniques and so on , species diversity and diversification mechanism were studied . the communities were classified into eight types by twinspan . the first axis of dca indicated basically the diversification of soil water , while the second axis indicated basically the disturbance degree by people . the correlations between n , organic matter , elevation and the first axis are negative association , and the others are positive
通过丰富度指数、物种多样性指数和均匀度指数,结合twinspan 、 dca 、 dcca排序,多元回归和相关分析,研究了物种多样性及其变化机制,把植物群落分为8个群落类型;物种多样性指数的dcca第一轴基本上反映了土壤水分的变化,第二轴基本上反映了人类对群落的干扰程度,物种多样性指数随土壤水分的增加而增大,随人类的干扰程度的增加而减小。
4.Meanwhile , we proved that the major factor that determines the distribution of plants in china is the primary productivity . the cold index ( the lowest temperature ) plays a more important role than the highest temperature and the annual mean temperature in restricting the diversity of plants
Dcca和cca排序也显示了和dca一致的结果,同时证明,决定中国陆地植物多样性分布格局的环境因素主要是初级生产力,而寒冷指数(即低温)对多样性的限制作用要大于高温和年均温的作用。
5.The preparation of optically active composite is a promising alternative to obtain a kind of new and competitive sensing membrane for fiber optic sensors , and has attracted the global attention . in this thesis , the modified sol - gel sensing membranes based on fluorescence quenching have been prepared by using tetraethoxysilane ( teos ) and dimthyldimethoxysilane ( dds ) as the main material , formamide as the drying control chemical additive ( dcca ) , ru ( phen ) 3cl2 and ru ( bpy ) 3cl2 as the indicator . this kind of membranes is crack - free and has low indicator - leaking rate
本文以四乙氧基硅烷( teos ) 、二甲基二乙氧基硅烷( dds )为主要原料,以甲酰胺为控制干燥剂,二价钌离子络合物钌( ) ?联吡啶( ru ( bpy ) _ 3cl _ 2 )和钌( ) ?菲咯啉( ru ( phen ) _ 3cl _ 2 )为荧光指示剂,采用改进的溶胶凝胶技术,通过添加控制干燥剂和有机掺杂两种手段,制备了基于荧光猝灭原理的光纤氧敏感膜。
6.The abundance of flowering plants and ferns is increased exponentially along it , and that of conifers change a little under low heat and water conditions , while the abundance of conifers increased exponentially along the axis under high heat and water conditions . dcca and cca showed the similar results as that of dca
被子植物与蕨类植物丰富度在dca第一轴上具有一致的排序特征,即呈现对数增长模型,而裸子植物丰富度的变化随水热条件的增加而改变的很小,但到高热量、高水分条件下,丰富度迅速的增加,呈幂指数增长趋势。
7.3 eight communities are identified by gradient analysis in desert - oasis ecotone , and species are divided into 5 ecological groups . dca ordination is superior to cca and dcca . variation of vegetation explained by environmental and spatial factors reaches 23 . 4 % ; among these the species matrix explained by non - spatial soil factors account for up to 11 . 5 % of variation , spatial variation that is not shared by soil factors explains up to 11 . 6 % , their interaction explains up to 0 . 3 %
3 、通过梯度分析,阜康荒漠绿洲过渡带群落可分为8个类型,物种可分成5个生态类型; dca排序效果优于cca和dcca ;土壤和空间因子解释了植被分异的23 . 4 ,其中土壤因子占11 . 5 ,空间因子占11 . 6 ,二者交互作用占0 . 3 。
8.The dcca ordination improves relativity between species and environmental factors . so it avails to exp lain the ecology meanings of ordination axis . but compared with dca ordination graph , the points distribution of two - dimension graph of dcca ordination is much thicker and more concentrated , which causes the limit of plant community types much more obscure
Dcca排序大大提高了种与环境的相关性,更有利于排序轴生态意义的解释,但其二维排序图与dca排序图相比,点的分布更加紧凑、集中,使得群落类型间的界限变得更加模糊,因而如果同分类方法结合使用, dca在样地和物种排序上的效果好于dcca和cca 。
9.The ratio of tetraethyloxysilane ( teos ) : ethanol : distilled water is 1 : 3 : 4 . n - n " dimethyl formamide ( dmf ) was used as solvent and drying control chemical additive ( dcca ) in a proportion of 0 . 3 dmf / ethanol volume ratio . drops of hf / hc1 mixture acid was added to promote hydrolysis ( ph = 2 )
溶剂的选择对基质凝胶孔的形状基本没有影响,但对其孔径分布有较大影响:在hf / hci混合酸催化情况下, dmf溶剂的样品孔径最小, dmf /乙醇混合溶剂的其次,乙醇溶剂的样品孔径最大。
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