1) multivariate petrophysics index
多变量物性指数
2) biodiversity index
生物多样性指数
1.
The biodiversity index was slightly lower in the OTC than in the CK.
群落各种群高度、密度和重要值增加、减少或无影响,生物多样性指数有所下降,群落结构发生一定变化。
2.
In this paper,the two important functions of Excel were firstly presented for calculating the biodiversity index;Then how to calculate parameters on biodiversity was described by the example in Excel;At last,the advantage of Excel was indicated in ecological statistical evaluation.
本文首先介绍了在Excel中用于计算生物多样性指数的两个重要函数;然后举实例介绍了在Excel中如何计算生物多样性指数;最后指出了Excel在生态学统计计算中的优越性。
3) biodiversity indices
生物多样性指数
1.
Nine biodiversity indices calculated on the basis of phytoplankton data were studied for their usefulness for eutrophication studies in landscaping water body.
采用微宇宙培养法,模拟微污染景观水体富营养化过程,研究其浮游藻类演替状况及生物多样性指数。
4) species diversity index
物种多样性指数
1.
Importance value, species diversity index (Shannon-Wiener Index), evenness index, ecological dominance of the community in relation to thent layers, i.
根据1400m2的样方面积调查，测算了群落乔木层、灌木层、草本层和层间植物的重要值、物种多样性指数（Shannon-Wiener指数）、物种均匀度、生态优势度。
2.
The author comparatively analyzed flora composition,life form spectrum ,vertical stratification,species diversity index,ecological dominance index and evenness index between an artificial Robinia pseudoacacia community and a herbal shrub community distributing typically at a disturbed slope near residential area in Longquanguan,Fuping County in Taihang Mountain.
人工刺槐林群落垂直结构复杂 ,物种数目增加 ,生活型谱更接近典型的暖温带落叶阔叶林群落类型 ,灌木层的物种多样性指数、均匀度指数较灌草丛群落的灌木层低 ,生态优势度较高 ;林下草本层与灌木层相比其生物多样性指数、均匀度指数和生态优势度指数均较高。
3.
The classification of community(fifty-six quadrats belonging to twelve plots) of Huoshan Mountain vegetation in Shanxi Province was carried out by TWINSPAN,and the species diversity at different succession stages was also comparatively analyzed by using species diversity index,richness index and evenness index.
随着演替的进行,霍山植被的物种多样性指数、丰富度指数和均匀度指数都呈增加的趋势,并在演替的中后期(混交林过渡群落阶段)达到最大值;而在不同的演替阶段,乔木层、灌木层和草本层的物种多样性指数的变化趋势也不同。
5) biodiversity
[英][,baɪəʊdaɪ'vɜ:səti] [美]['baɪodaɪ'vɝsətɪ]
物种多样性指数
1.
Land desertification,soil salinization,grassland degradation, and reduction in biodiversity.
根据对样地的实际调查资料,采用物种多样性指数、丰富度和均匀度指数对塔里木河上游阿拉尔地区的天然植被的物种多样性进行了分析。
6) diversity of animal
动物多样性指数
1.
partition index diversity of animal of Dendrolimus punctatus safety area concrete numerical value was ≥2.
通过比较广西宾阳县、宁明县、陆川县、临桂县、全州县马尾松毛虫安全区春季与夏季松林群落中的害虫种数、天敌种数、中性动物种数和益害比、动物多样性指数,认为划分马尾松毛虫安全区动物多样性指数的具体数值为≥2。
补充资料：Kervaire不变量
Kervaire不变量
Kervaire invariant
K日圈aire不变量[KerVaire众W田血Int;Kep肚pa .oaPH明T〕 维数为k十2的殆可平行光滑流形M的一个不变量，定义为在M的Zk+1维同调空间格上的模2二次型的Arf不变量(A汀一in呢创ant). 设M是维数为4k十2的单连通殆可平行闭光滑流形，它的同调群除V=HZ*十:(M;z)外，H，(M;Z)为零，o
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条