Studies of numerical classification on the plants of Equisetaceae in China.
中国木贼科植物的数量分类学研究。
Some problems about numerical classification of flower cultivars are discussed.
并对花卉品种数量分类中的一些方法进行了初步探讨。
The use of less skilled labour for numerical classification is a real possible advantage.
技术 ，这真正是一个潜在的优点。
Traditional cluster analysis is a practically important technique often used in numerical classification.
传统的聚类分析是常用的重要数值分类方法。
According to the principles of numerical taxonomy, the necessity of transformation of function of test data in numerical classification was analyzed.
依据数量分类学原理对数量分类中试验数据的函数变换的必要性进行了分析。
It also revealed the trend that the principle of vegetation classification is becoming comprehensive and classification methods are utilizing numerical classification instead of exterior one.
揭示出植被分类的原则从单一性向综合性，分类方法从外貌分类向数量分类的发展趋势。
It is possible finally to base classification on the full floristic composition of communities without reliance on numerical techniques.
最后，分类还有一种可能，即以植物群落的全部植物种类组成作为分类的基础，并无须依赖于计算技术。
Classification of mass spectra of toxic compounds is based on the numerical features derived from spectral data.
有毒化合物质谱分类是以光谱数据的数值特性为基础的。
This paper briefly discusses the development of groundwater and solute migration numerical simulation, the classification of numerical models and the main steps of numerical simulation.
介绍了地下水及溶质运移数值模拟的研究进展、数值模型的分类和数值模拟的步骤。
Numerical simulation shows that the proposed method can reduce the dimension of the feature space, and has higher correct classification rate.
数值实验表明，该方法可以降低特征空间维数，具有较好的分类准确率。
The support design is based on empirical approach from rock mass classification Q-system; and it is then verified by the numerical analysis.
围岩支护是依据岩体分类Q系统采用经验法设计，然后采用数值分析校核。
The classification and ordination of the grassland vegetation are studied with the numerical methods of TWINSPAN (Two-way indicative species analysis) and DCA (Detrended correspondence analysis).
本文运用二元指示种分析TWINSPAN和无倾向对应分析DCA的数学方法对草地植被进行分类与排序。
It is possible, finally, to base classification on the full floristic composition of communities without reliance on numerical techniques.
最后，分类还有一种可能，即以植物群落的全部植物种类组成作为分类的基础，并无须依赖于计算技术。
Companies were all assigned a numerical Standard Industrial Classification (SIC) code (now North American industry Classification System, or NAICS) identifying which industry sector they fit in to.
每个企业都会有一个标准产业代码(SIC)(现为北美产业分类系统，简称NAICS)，用来确定各自属于哪个产业部门。
This paper introduced the classification of numerical calculation errors, and used math expressions as examples to illustrate truncation error.
介绍了数值计算中的误差类别，用数学表达式举例，说明了截断误差，根据IEEE754标准用数学表达式说明了舍入误差；
This paper introduced the classification of numerical calculation errors, and used math expressions as examples to illustrate truncation error.
介绍了数值计算中的误差类别，用数学表达式举例，说明了截断误差，根据IEEE754标准用数学表达式说明了舍入误差；
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