This model is reliable in mathematical principle and it is easy to use the formulae.
该模型数学原理可靠，公式运用简便。
First and foremost, the two indices use different averaging formulae when calculating price changes for each individual item.
第一，这两个指数在计算单项产品的价格变化时套用了不同的平均值公式。
The pricing formulae for copper, which allow buyers to set prices after the cargo arrives, as well as the extensive use of hedging instruments, have helped blunt some of the price gyrations.
铜的定价模式和对冲工具的广泛运用缓和了价格波动，这种模式允许买家收货后再定价。
The formulae in common use for the calculation of capital cost rate are logical but defective.
常用的资本成本率计算公式既有其合理性，又存在一些缺陷。
Its main characteristics are reflected by the concrete use or arrangement of words, syntax, rhetorical devices, discourse structure, punctuation marks, graphs and formulae, etc.
其特点是通过词语、句式、修辞手法、篇章结构、标点符号、图表公式等因素的具体运用体现出来的。
These ideas can be described without the aid of formulae, so why use them?
这些观点并不是非得有公式才能讲清楚啊，为什么一定要用这些公式呢？
The boundary type cubature is quite the type of formulae that only use numerical values on the boundary of the domain.
边界型求积公式正是仅仅利用被积函数在区域边界上的数值构造的公式。
It is proposed to use the energy concentration factor and directivity factor as indication of the directivity of the array, and formulae as well as the way of using them are presented.
对切比雪夫阵的指向性提出了用能量集中因数和指向性因数表达的概念，并给出了二者的计算方法和使用范围。
This paper introduces a method and the result by the use of the regression analysis method to establish helicopter group weight formulae.
本文介绍了利用回归分析法建立直升机部件重量公式的方法和结果，并用子样外的几种中、小型直升机作了校核验算。
The results of it are the working equation, the count formulae of earthwork quantity and the precision analysis in planning the Unknotting Parameter of field in the use of least squares.
研究结果：用最小二乘法设计场地平整参数的法方程、土方量计算公式及其精度分析公式。
It is difficult for oil engineers to use the models correctly because these formulae are miscellaneous, isolated each other, and have no any relationship among them.
这些模型是相互分散的、孤立的，种类多、公式繁杂，相互间的联系又不清楚，使油气田现场研究人员难于准确应用。
The paper deduces the general formulae of the sweet point about the rotation around a fixed point of rigid body, from the kinetic equation of it, and puts formulae to use for special rigid bodies.
从刚体定点转动的动力学方程出发，推导定点转动刚体打击中心位置的普遍表达式，并通过特例加以应用。
By the use of the displacing enveloping drawing method, a set of exact formulae for calculating the virtual pitch diameter is deduced and verified by measured data.
本文考虑了非对称三角形螺纹的螺距偏差和牙侧角偏差的各种组合对作用中径的共同影响，运用了包容图位移法，分析和推导出非对称螺纹作用中径的精确计算公式。
The use of complex formulae and the language of the specialist have been avoided to allow for a clear and concise presentation of the essential facts.
使用复杂的公式和语言的专家本来是可以避免让一个明确的并简要地介绍有关的基本事实。
This paper introduces a method and the result by the use of the regression analysis method to establish helicopter group weight formulae. A check has been made using some helicopters except samples.
本文介绍了利用回归分析法建立直升机部件重量公式的方法和结果，并用子样外的几种中、小型直升机作了校核验算。
The author makes use of the logic function of the computer and programs, to acquire strict expansion of some formulae of tidal potential according to astronomical basics.
文中利用计算机的逻辑功能编制了演绎程序，按照天文原理对引潮位的部分公式进行严格推演与展开。
It is proven that, by use of the deduced formulae, the calculated results of the...
结果表明，有效导热系数的计算值同试验值相一致。
It is proven that, by use of the deduced formulae, the calculated results of the...
结果表明，有效导热系数的计算值同试验值相一致。
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