查询词典 breadth index

Niche breadths of twenty dominant species were analyzed using Shannon-Wiener niche breadth index, and the dominant species were classified into four ecological groups.

采用Shannon-Wiener生态位宽度指数和Petraitis生态位重叠指数测定了滹沱河流域湿地植被20个优势种群的生态位宽度和生态位重叠。

The refractive index of metal effects mainly resonance depth and the half peak breadth. There is an optimum metal thickness with the largest resonance depth and the smallest reflection coefficient. The refractive index and thickness of dielectric layer and recording layer impact resonance angle and the half peak breadth.

金属薄膜的折射率是影响共振半峰宽度和共振深度的主要因素，计算表明存在一个最佳的金属层厚度，使得共振深度最大，反射系数最小；介质层和记录层的折射率和厚度的变化均会影响共振角的大小和共振峰半峰宽的变化。

Using the Shannon-Wiener's niche breadth index and the Pianka's niche overlaps index, we found that the Nereis japonica, nemerteans and eelworms had broad niche breadths (above 2.80); the niche overlaps among them was high (above 0.90) in the quantitative analysis on the 21 species present in the quantitative sample analysis.

对定量取样中获得的21个物种以Shannon-Wiener指数为基础进行了生态位宽度测定，以Pianka重叠指数为基础进行了生态位重叠值分析，结果表明日本沙蚕、纽虫和线虫的生态位较宽，均为2.80以上，它们之间的生态重叠值也较高，均为0.90以上。

METHODS: Employing Health-Carter method, the 218 college students were measured on the indexes of biepicondylar breadth of the humerus, biepicondylar breadth of the femur, tricps skinfold, subscapular skinfold, suprailiac skinfold, medial calf skinfold, body length, body weight, upper arm girth flexed and tensed and calf girth. Every index was measured 3 times and average values were adopted, and compared to that of other regions.

采用Heath-Carter体型法对218 名在校大学生进行肱骨内外上髁、股骨内外侧髁间径及肱三头肌位、肩胛下位、髂前上棘位、腓肠肌位皮褶厚度，身高、体质量、臂最大收缩围和小腿围测量。10项指标均由专人负责，每项指标测量3次，取其平均值作为测量结果，并与其他地区大学生体型进行比较。

Niviventer niviventer had the highest index of the niche breadth (1.00)while Rattus nitidus, Soriculus hypsibius, Blarinella quadrticauda and Crocidura attenuata had the lowest index of the niche breadth ...

空间生态位宽度指数的季节变化表明，社鼠种群分布没有明显的季节差异，中华姬鼠和安氏白腹鼠每年可能有一个数量高峰期，高山姬鼠一年则可能有两个数量高峰。

Mostly have the round skulls, among them theircranial index are mostly hyperbrachycephal and ultrabrachycephaltype. Generally, the cranial length-height indexes of the head arehypsicephalic type, and the majority of cranial breadth-height index on 29head are apeinocrany type.

耶律羽之组男性颅骨一般具有短而宽的颅形，颅长宽指数多为特圆颅型和超圆颅型，颅长高指数显示多为高颅型，颅宽高指数多为阔颅型的颅部特征。

The population dominance index, Shannon-Wiener index, evenness, niche breadth and community similarity were used to analyze the diversity and eco-niche of soil moniliaceous hyphomycetes in five ecosystem-types.

利用种群优势度、Shannon-Wiener多样性指数、均匀度、生态位宽度、群落相似性等指标对该地区不同生境的土壤淡色丝孢菌物种的生态多样性及物种生态位进行了分析。

Result The temporal and spatial niche breadth index of mango anthracnose in control area were 0.1785 and 0.9656, resp., that in conventional area were 0.1754 and 0.7966, resp., and that in prediction area were 0.1762 and 0.8267, resp.

结果］对照区芒果炭疽病时间和空间生态位宽度指数分别为0.1785、0.9656；常规区芒果炭疽病的时间和空间生态位宽度指数为0.1754和0.7966；预测区芒果炭疽病的时间和空间生态位宽度指数为0.1762和0.8267。

Based on the investigation of the growth status of gardens plants with the same site conditions, the important values of populations were calculated with the software of ArcMap, the niche breadth of populations were studied using the Shannon-weinne diversity index, Levins niche breadth index and niche overlap.

通过对立地条件类型相同城市的园林绿地植物生长状况进行调查，运用ArcMap软件计算各种群的重要值；采用Shannon-weinne多样性指标、Levins生态位宽度指数和1994年黄英姿提出的生态位重叠计算公式进行种群生态位宽度的研究，将种群生态位理论运用于生态园林建设中。

A space series substituting time series method was adapted and Levins niche breadth index and the Pianka Niche overlap index was applied to calculate the resumption of different age and population niche and niche overlap in spring-autumn grassland enclosed for different years at Zhaosu horse ranch.

采用空间序列代替时间序列的方法，运用Levins生态位宽度指数和Pianka生态位重叠指数，对不同围封恢复年限种群生态位及生态位重叠计算分析。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷