查询词典 cluster

With the regional indexes of reference crown height and environmental factors including topographical, geomorphic, soil, climatic, geographic, standing condition and so on, by establishing GIS and with PCA and bidimensional step cluster with constraint condition, ecological region with the unit of town or land forest farm can be realized.

摘 要：采用红松基准上层高及环境因子地形、地貌、土壤、气候、地理、立地条件等为区划指标，通过建立地理信息系统和应用主成分分析、有约束条件的二维逐步聚类方法，实现了以乡为区划单元的生态区划。

The experiment was carried out to study the productivity and characteristic of four grasses in karst peak-cluster billabong, northwestern Guangxi.

在桂西北峰丛洼地研究了4种牧草的生产力大小和形成特点，结果表明：桂牧1号象草Pennisetum americanum×P。

Sb can combine with Cu and P to form a low melting point compound which lowers the melting point of binary Cu-8P eutectic alloy by nearly 200℃. Bi and Cu can create compounds with low melting point(270℃) distributing at the boundaries and that is the reason why the melting point of (Cu-8P)-Bi is lower than that of binary Cu-8P eutectic alloy. The eutectic cluster can be refined with the addition of Fe, and that is the reason why the addition of Fe can decrease the melting point of Cu-8P alloy. Two means of decreasing the melting point of Cu-8P are found.

一定量的Sb与Cu， P形成低熔点相，从而大幅降低了Cu-8P合金的熔点，使其熔点降低近200℃；加入少量Bi后， Bi与Cu在共晶团晶界上形成熔点为270℃左右的低熔点化合物，且Bi的加入明显细化Cu-8P合金共晶团，从而使Cu-8P合金的熔点降低；加入Fe能明显细化Cu-8P合金的共晶团，使层片间距由8μm减为2μm以下，并使共晶团由层片状向短棒状转变，虽然Fe与Cu形成熔点为806℃的高温相，但Fe的细化作用使得Cu-8P合金的熔点降低，但降低幅度不大。

The main gauge binnacle houses the speedo, tach, and warning light cluster, while a sliver-like binnacle houses clock and other warning lights at the top of the center stack.

主要衡量binnacle房屋的速比，环，并警示灯组，而银像时钟binnacle房屋和其他警告灯上方的中控台。

NMath Stats contains a data table class with functions for computing descriptive statistics, such as mean, variance, standard deviation, percentile, median, quartiles, geometric mean, harmonic mean, RMS, kurtosis, skewness, and many more; PDF, CDF, inverse CDF, and random variable moments for a variety of probability distributions, including normal, Poisson, chi-square, gamma, beta, Student's t, F, binomial, and negative binomial; Combinatorial functions, such as factorial, log factorial, binomial coefficient, and log binomial; Multiple linear regression; Basic hypothesis tests, such as z-test, t-test, and F-test, with calculation of p-values, critical values, and confidence intervals; One-way and two-way analysis of variance and analysis of variance with repeated measures; Multivariate statistical analyses, including principal component analysis and hierarchical cluster analysis.

nmath统计包含一个数据表的阶层与职能计算描述性统计，如平均，方差，标准差，百分位，中位数， 25 ％，几何平均数，调和的意思是，有效值，峭度，偏度，还有更多的； PDF格式，民防部队，逆民防部队，并随机变量矩的各种概率分布，包括正常，泊松，卡方检定，伽玛，测试版，学生的吨，男，二项式，并负二项分布；组合的功能，例如阶乘，日志阶乘，二项式系数，并登入二项式；多元线性回归；基本假设测试，如的Z测试， t检验， F检验，计算p值，临界值，和置信区间；之一，双向和双方法方差分析和方差分析与反复的措施；多元统计分析，包括主成分分析和聚类分析。

Also, following the digital processing of these logs, the optimal discrimination functions for determination of different types of bioherm reservoirs are presented by means of optimal partition , cluster and regression methods.

利用岩心和测井数据总结了生物礁各种类型的测井响应，提出了适合柴西地区生物礁储集层的测井曲线特徵。

As a kind of biotic community, the enterprise cluster possesses some behavioral traits of the animal community.

作为一种群落组织，企业集群有着动物社群生活的行为特征。

The aim of the research was to discuss the cluster analysis of chromosomes so as to classify bivalve in the cell level.

［目的］探讨利用染色体参数进行聚类分析，以期在细胞水平上对双壳贝类进行分类。

For the bad cluster, the program will be black red "B" mark.

对于坏簇，程序会以黑底红字的"B"标出。

Xanthomonas campestris pv. campestris is the causal agent of black rot disease of crucifers worldwide. In both plant and mammalian Gram-negative pathogenic bacteria, type III secretion systems, encoded by hrp cluster, play a crucial role in interactions with the host. The proteins assembled TTSS were highly conserved.

野油菜黄单胞菌野油菜致病变种是一种能在全球范围内引起所有十字花科植物黑腐病的重要病原细菌。hrp基因簇编码的Ⅲ型分泌系统在动植物病原细菌和寄主互作过程中起着极其重要的作用。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐