查询词典 evenness

The role of six types of urban plantations in Harbin in maintaining woody plant diversity was assessed quantitatively by sample plot survey and diversity index analysis. The naturalization process and the approaching-nature management modes of the urban plantations were also discussed in terms of richness, evenness and Shannon-Wiener indexes of regeneration layer, succession layer, main storey, brush layer aiming to provide a basis for forest management and biodiversity protection.

采用样地网格调查方法与多样性指数分析方法，定量评价了哈尔滨城市人工林在维持木本植物多样性方面的作用，并通过分析林分更新层、演替层、主林层的多样性指数，探讨了城市人工林自然化过程及其近自然经营途径，以便为哈尔滨城市森林经营与生物多样性保护提供依据。

It chooses the number of landscape types as human interference factors to construct artificial neural network model, multi-model adaptive regression splines, support vector machine model and projection pursuit regression model to respectively analog analysis human disturbance on the impact of the landscape diversity, dominance and evenness.

选择景观类型数量作为人类干扰因子，构建人工神经网络模型、多元自适应回归样条模型、支持向量机模型和投影寻踪回归模型，分别模拟分析人为干扰对景观多样性、优势度和均匀度的影响。

In this paper, the reliability analysis and reliability optimization design of automatic yarn evenness tester used in yarn lab are mainly discussed.

本文主要对纱线实验室仪器全自动条干仪进行了可靠性分析和可靠性优化设计。

Secondly, in spite of the reliability of software and control system, the mechanical system reliability of automatic yarn evenness tester is researched using FTA, and fault trees of each unit and system are established by analyzing its structure and function. According to system reliability theory and events probability, the mechanical system fault tree is analyzed by means of qualitative analysis and quantitative calculation, the system weak parts are found , and the ways are put forward to improve the mechanical system reliability.

其次，在不考虑软件及控制系统可靠性的情况下，利用故障树分析的方法，对全自动条干仪机械系统可靠性进行了分析研究，通过对其结构、功能的分析，建立了单个单元的故障树和系统的故障树；并根据系统可靠性的原理和事件发生的概率，进行了定性分析和定量计算，找出了系统的薄弱环节，提出了提高机械系统可靠性的途径。

Diversity of soil surface, stone gully and stone pit is 1.199, 1.592 and 1.962; evenness index of soil surface, stone gully and stone pit is 0.616, 0.989 and 1.095; dominance of soil surface, stone gully and stone pit is 0.545, 0.353 and 0.245 in soil macrofauna community structure.

土面生境土壤动物的多样性指数为1.199，石沟的为1.592，石槽的为1.962；均匀性指数为0.616，石沟的为0.989，石槽的为1.095；土面生境土壤动物的优势度为0.545，石沟的为0.353，石槽的为0.245。

Diversity of soil surface, stone gully and stone pit is 1.199, 1.592 and 1.962; evenness index of soil surface, stone gully and stone pit is 0.616, 0.989 and 1.095; dominance of soil surface, stone gully and stone pit is 0.545, 0.353 and 0.245 in soil macrofauna community structure.

土面生境土壤动物的多样性指数为1.199，石沟的为1.592，石槽的为1.962；土面生境土壤动物的均匀性指数为0.616，石沟的为0.989，石槽的为1.095；土面生境土壤动物的优势度为0.545，石沟的为0.353，石槽为0.245。

The steppe landscape is dominant but not apparent in its patch and area, and the percentage of the original vegetation of Stipa bungeana steppe is very low in the study area, which is apparently characterized by human disturbance. The diversity and evenness of patches in the study area are higher than those of the steppe landscape area, and the fragmentation and the isolation of the steppe are the highest. The landscape shapes of artificial arbor woods and cultivated lands are the simplest, and the landscape shapes of classical steppe and artificial shrub are in an instable stage.

结果表明：(1)草原景观在其斑块数和面积上虽然仍居首要地位，但其优势并不十分明显，而且该区原生植被本氏针茅草原只占很小的比重，呈现出非常明显的人类干扰特征；(2)研究区斑块的多样性程度和均匀度较高，而面积的多样性程度和均匀度较低，同时，典型草原的景观破碎度最大，景观分离度也最大；(3)景观形态上，人工乔木林和耕地的景观形态最为简单，典型草原和人工灌丛这2种景观类型还处于很不稳定的阶段。

This paper introduced some measures to decrease the spun yarn evenness CV and cop faults per million-metre.

介绍了降低细纱条干CV值、减少管纱纱疵的一些尝试性措施。

Keeping the score of engineering ability is effective in improving the management of fibre number evenness degree of raw silk.

采用工程能力指数的方法控制生丝纤度均匀度是十分有效的。

Some representative quantitative indices of landscape diversity,including mean patch area,percent of landscape,perimeter-area fractal dimension,aggregation,Shannon′s diversity index,and Shannon′s evenness index were used to desc...

主要结果为3个时期，与整个西双版纳州相比，公路沿线10km范围内的人工林景观百分比更大，增长更快，天然林景观则表现出相反的特征和趋势；且距公路越近，天然林的景观百分比越小，人工林的景观百分比越大，表现出明显的公路效应。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。