利用最大似然估计原理，给出了构建系统发生树的模型和算法。
A model and an algorithm were provided for constructing phylogenetic tree based on the principle of maximum likelihood estimate.
它是提供使用全部基因组序列数据计算病毒物种系统发生树的第一个资源。
It is the first resource to provide phylogenetic trees of viral species computed using whole-genome sequence data.
因此HOVERGEN对比较序列分析、系统发生树和分子进化研究特别有用。
Thus HOVERGEN is particularly useful for comparative sequence analysis, phylogeny and molecular evolution studies.
允许用户在脊椎动物物种间选择数列同源性基因，然后显示多序列联配和系统发生树。
It allows one to select sets of homologous genes among vertebrate species, and to visualize multiple alignments and phylogenetic trees.
目的建立风疹病毒包膜糖蛋白e1的克隆载体；研究e1基因变异情况，并对其序列进行系统发生树分析。
Objectives to construct the cloning vector of glycoprotein E1 gene of rubella virus, to study the mutation of glycoprotein E1 gene, and to analyze the sequence of E1 gene by the phylogenetic tree.
系统树显示，亚洲人群先与欧洲人群相聚， 之后再与非洲人群相聚，非洲人群位于系统发生树的最顶部；
As presented by the phylogenetic tree, Asian had a convergence with European first, and grouped together with African. Beninese which came from Africa was on the top of dendrogram.
系统发生树分析表明：卢龙毒株ll36755与其他已经报告的两种猪和一种人类的G5型毒株可能具有相同的起源。
Phylogenetic analysis showed Lulong strain LL36755 clustered together in the same lineage as two other reported porcine G5 rotavirus strains and one reported human G5 rotavirus strain.
对BDV阳性产物进行基因序列测定、同源性和氨基酸顺序分析，绘制系统发生树，初探bdv感染的分子流行病学特征。
Further, the gene sequence and amino acid sequence for BDV positive product were analyzed to establish the molecular epidemiologic characteristic by drawing phylogenetic tress.
文中对引起水套炉发生失效的各个因素进行系统分析，建立了以水套炉失效为顶事件的失效故障树。
All factors that may make the waterjacket heater failure was analyzed in the paper, and builds a fault tree with failure of water-jacket heater as top event was set up.
用模糊数表示活齿传动中各事件发生的概率，对摆动活齿传动系统进行了模糊故障树分析。
The probability of event occurrence in a movable teeth drive is described by fuzzy number. The fuzzy fault tree analysis of a swing movable teeth transmission system is conducted.
针对该系统底事件和中间事件发生故障概率情况获取不足的情况，建立了故障树模型。
It uses separate-type and touch switch components, with complicated structure and high failure rate. The failure tree analysis method for controlled system is formulated.
文章在采用故障树方法对平台消防系统发生失效的路径及可能性进行分析。
In this paper, fault tree method was adopted to analyze the failure routine and possibility of the Marine emergency system.
它包含了富集模拟程序以在许多不同的系统发生和联合模型中产生树。
It contains rich simulation routines to generate trees under a number of different phylogenetic and coalescent models.
用模糊数表示活齿传动中各事件发生的概率，对摆动活齿传动系统进行了模糊故障树分析。
The probability of event occurrence in a movable teeth drive is described by fuzzy number. The fuzzy fault tree analysis of a swing movab…
用模糊数表示活齿传动中各事件发生的概率，对摆动活齿传动系统进行了模糊故障树分析。
The probability of event occurrence in a movable teeth drive is described by fuzzy number. The fuzzy fault tree analysis of a swing movab…
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