查询词典 niche

Using the Pearson correlation coefficient and Spearman rank correlation coefficient, the interspecific association of 13 species in different communities in Beijing mountainous area were investigated, and the niche breadth and niche overlap of 13 species were studied.

应用Pearson相关系数和Spearman秩相关系数检验，研究了北京山区天然林群落13个乔木种群的种间关联性，并对13种植物种群的生态位宽度和生态位重叠进行研究。

"Fishing family music" a total of nine roles, that is, the old shot-one people, niche,小旦all four, niche,小旦color handheld fan vases, flower basket combination, the old bastard shot carry out fishing, fishing people to describe happy harvest, to celebrate the festive season, when a civil Square Dance, with the exception of outside entertainment, there are guide people to perform good deeds and correct the role of rural wind.

渔家乐》共有九个角色，即老渔翁一人、小生、小旦各四人，小生、小旦手持彩扇花瓶，肩挑花篮，老渔翁肩扛渔挑王八，形容打渔人喜庆丰收，欢度佳节时的一种民间广场舞蹈，除娱乐之外，尚有导人向善与端正乡风的作用。

Based on the investigation of 38 forest plots in Beijing mountainous region, the niche breadth and overlap of seven rare and endangered herbage plants Glycine soja, Cypripedium macranthum, Malaxis monophyllos, Herminium monorchis, Paeonia obovata, Platanthera chlorantha and Liparis japonica were calculated and analyzed. The results showed that G. soja had a wider niche breadth (0.297), while C. macranthum, M. monophyllos and H.

基于北京山区有珍稀濒危草本植物分布的38块森林群落样地调查数据，对北京山区的野大豆、大花构兰、沼兰、角盘兰、草芍药、二叶舌唇兰和羊耳蒜等7种珍稀濒危草本植物进行了生态位宽度和生态位重叠计算与分析。

Based on the data collected from 8 plots and using Shannon and Simpson index, this paper calculated and analyzed diversity of Eupatorium catarium community in Hainan. And, niche breadth and niche overlap of E. catarium community were analyzed by using Levins and Pianka formulae. The results were as follows:(1)The diversity of E.

基于对海南儋州地区假臭草群落的调查，应用辛普森和香农指数测定了该地区不同生境类型的假臭草群落的生物多样性；并以各种杂草的重要值作为生态位计算的资源状态指标，应用Levins公式和Pianka公式计算分析了该地区假臭草群落各物种的生态位宽度和生态位重叠。

In the section on theoretical exploration of this thesis,thenature of niche and the particularities of plant niche are discussed indetail.

在理论研究方面，本文深入讨论了生态位的性质问题及植物生态位研究的特殊性问题。

Based on the side veins, distance between leaf base and breadth, leaves length, leaves breadth and leafstalk length, populations initially could be compartmentalized three different niche types. Based on the angle of foliage, it could be compartmentalized two niche types.

根据侧脉、基宽距、叶长、叶宽、叶柄长，可初步将各居群分别划分为三种不同的生态型，而根据叶基角，连香树可划分为两个生态型。

However, are you going to capture your niche market as well as if you practiced niche marketing?

不过，你怎么利基市场以及捕捉你，如果你搞营销利基？

If you have a site in a niche market, do your research and check out other sites in your niche.

如果你有一幅利基市场，你看看其他网站的研究和贵利基。

Two-dimensional scatter plot of principal axes analysis,systematic cluster tree and the minimal spanning tree on the basis of niche overlaps were drawn,which revealed the ecological similarity of 42 moss species.The combinative application of principal axes analysis,systematic cluster analysis and minimal spanning tree method on the basis of niche overlaps could express the ecological similarities among species intuitively.

以此为指标，分别应用主坐标排序、图论聚类及系统聚类分析方法，作出了反映42种地面藓类的种间生态关系的二维投影图、最小生成树和动态聚类图。3种方法相结合，能够对生态位重叠值矩阵进行直观地表达，并使所表达的藓类种间关系具有确切的生态学含义。

In this paper, a real-valued-coding niche genetic algorithm modifying the binary-coding niche genetic algorithm (Goldberg and Richardson, 1987) is developed for searching global minimum value of a multiple-peak function efficiently.

本文修改Goldberg 与 Richardson(1987)提出之二位元编码利基遗传演算法，发展一实数编码利基遗传演算法以搜寻多峰多谷函数之全域最小值。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。