查询词典 structure formula

The total reflection coefficient of this structure is then obtained through a recursion formula, which is derived by using electromagnetic field theory.

用波动方法推导了计算这一结构总反射系数的一个新的循环公式。

RNA secondary structure;recursion formula;loops;stacks;combinatorial enumeration

论文导师王天明，论文学位硕士，论文专业计算数学

This text proceed with the theory of the vibration, utilize typical elastic hinge law analyze structure dynamics characteristic when the blade is quivered to instability, and then use relevant knowledge of blade vibration to simplify the model and the aerodynamic force of the vibration. Through the simplification, we can get the equation of the blade, which is dispersed to its instability. Then VISUAL BASIC procedure is utilized to work out thecharacteristic value of vibration and the vibration frequency. At last comparing the result which is calculated by the above-mentioned theory formulae with the result which is calculated by internationally agreed procedure ANSYS to verify the accuracy of the formula of reduction.

本文从振动理论入手，利用最为典型的弹性铰链法分析叶片发生颤振失稳时的结构动力学特性，然后对振动模型及振动时所受的气动力进行简化，利用简化方程得到叶片发生发散失稳时的振动方程，利用编制的VISUAL BASIC程序解出振动的特征值并得到振动频率，最后分别通过上述的理论公式和国际通用的有限元程序ANSYS对风力机叶片模型进行发散失稳时的频率计算，验证简化公式的准确性。

Through the theory analyse, we gave the concept of broad sense and the formula of drag force, then analysed main facts of drag force; based on existing experiment datas and theory results, the thesis discussed calculate method for hydrodynamic pressure and pulsating pressure which effect on soleplate, at the same time, based on special structure of local material dam overshot spillway and essentiality of safe flowing, we gave advice on fixing parameter.

通过理论分析，提出了广义拖曳力的概念并推导出拖曳力的计算公式，分析了影响拖曳力的主要因素；根据已有的试验资料及理论成果对作用于底板的动水压力和脉动压力的确定方法进行了探讨，并依据当地材料坝坝体溢洪道的结构特殊性和泄水安全的重要性，对有关参数的合理取值提出了建议。

The structure of the stationary distribution is shown and the general formula for determining this distribution is given.

并对其平稳分布结构进行研究，进而得到求平稳分布得一般公式，主要结果见命题2.4.1。

Auxiliary teaching system for the course Vehicle Structure based on Web applies the systematic method and Web resources so as to achieve the structural formula and systematization of information.

信息化教育最根本的特征是教育信息资源的利用和信息技术特别是多媒体网络技术在教育教学中的应用。

Results show that formula structure is rational.

结果表明：公式的结构是合理的。

Also, the formula of the structure damage is given.

此外，分析提出了框架结构整体损伤值的计算公式。

A formula structure analysis method based on LL(1) grammar is introduced in Chapter 4, too.

第四章还介绍了一种基于LL(1)文法的数学公式重构算法。

The traditional method of analysis of RC structure is based on experiental formula which are concluded from large number of experiments.

钢筋混凝土结构分析和强度计算，传统方法是采用建立在大量试验研究基础上的简化计算公式。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。