first approximation
英 [fɜːst əˌprɒksɪˈmeɪʃn]
美 [fɜːrst əˌprɑːksɪˈmeɪʃn]
一级近似
双语例句
- At a first approximation then, XML documents should also be valid SGML documents.
在这样一种近似性的前提下，XML文档也应该是有效的SGML文档。 - As a first approximation, you could create a setText() method that looks like this
作为首要方法，可以创建类似下面的setText（）方法 - This approach is mathematically a first approximation to messages with a variable size ( bear with me, I will keep it short and simple).
这个方法在算术上最接近大小不定的消息（请原谅，我将尽量使它简短）。 - In a first approximation, the departure from a constant amplitude vs frequency characteristic will be a characteristics with a linear slop that will vary with time.
采用一级近似，则可认为对频率特性曲线的等幅偏移是一具有时变线性斜率的特性曲线。 - So this is the first approximation he made.
这就是第一个近似。 - Homogeneous spherical elastic earth model is the first approximation of the real earth in the approach to study the earth tide, this paper gives a numerical.
球状弹性均匀地球模型是地球的一级近似，本文给出计算该地球模型固体潮应力场的计算方法。 - What we've learned so far is as a first approximation, what we want to do is put the atom with the lowest ionization energy in the middle here.
我们之前所学的可以作为第一近似，我们要做的是把电离能，最低的原子放在中间。 - To a first approximation, the yield on UK or US sovereign bonds should reflect expected future short-term rates of interest, with a small risk premium, since outright default is inconceivable.
既然彻底违约是不可想象的，那么在一级近似下，英国或美国国债的收益率应该反映出预期的未来短期利率、再加上少许风险溢价。 - Therefore, in first approximation, one may expect that large ruptures of the same fault segment will occur at approximately constant time intervals.
此外，他们不善于思考可能存在的其他解释。好的讨论通常以得到的结果和解释的评论开始。 - To a first approximation wheat is the staple food of mankind, and its history is that of humanity.
粗略地讲，小麦是人类的主要粮食，而它的历史也成为了人类历史的一部分。 - So the first approximation is, you can realize that the molar volume of the gas is always much bigger than the volume of the solid or the liquid.
第一个近似是，你会发现气体的摩尔体积，远远大于固体，和液体的摩尔体积。 - The economic effects of an increase in immigration are, at a first approximation, neutral.
粗略看来，移民增加产生的经济效果是中性的。 - Equation ( 4-198) yields a first approximation for the change in the natural frequency of vibration.
方程（4－198）给出了一级近似下的固有振动频率的改变量。 - Firstly the equilibrium stability of autonomous Birkhoff system is studied by the Liapunov first approximation theory and the Liapunov direct method, and the corresponding criteria for equilibrium stability and unstability are given.
首先根据Liapunov一次近似理论和Liapunov直接法研究自治Birkhoff系统的平衡稳定性，给出平衡稳定性与不稳定性的有关判据。 - The diploe moment of nitrotoluene ( the series of nitro toluene) are dependent on the geometric structure and was calculated in first approximation from the vectorial summation of the bond dipoles, that can be used for reference of fundamental study of organic chemistry and process analytical chemistry.
甲苯硝基化合物的偶极矩决定于它们的几何结构，可由各键的偶极矩矢量之和作近似计算，它可以用作有机化学以及过程分析化学基础研究的参考。 - In this paper, Hencky's membrane solution is used for the first approximation in outer field solution, and then the second approximate solution is obtained.
本文把Hencky的薄膜解当作外场解的一级近似解，并求出了外场解的二级近似解。 - We proved that the Lyapunov's stability condition in first approximation was satisfied for the helical rod in relaxed state in the spatial domain, as well as in the time domain.
证明松弛状态下的非圆截面螺旋杆无论在空间域或时域均满足一次近似意义下的Lyapunov稳定性条件。 - Furthermore, the transmittance in the central region of the band gap is studied, and the formula of transmittance near the central frequency with the first approximation are deduced. The spectrum line width and quality factor of the Fabry-Perot cavity are qualitatively discussed.
此外还研究了禁带中心区的透射率，给出了中心频率附近透射率的一级近似解析解，并由此定性讨论了Fabry-Perot腔的谱线宽度和品质因子。 - It is the present purpose to establish the formulation of a kind for the mathematical model of first approximation linear theory of thin-walled shells and to provide error estimates of finite element solution.
本文利用S&族坐标系和张量分析工具，建立了一级近似理论的数学模型，并且给出了有限元解的误差估计。 - The calculated results show that it is necessary to use the high-order approximate algorithm to replace the first approximation.
实际计算结果表明用高级近似计算代替一级近似解是必要的。 - It is shown that based on the perturbed equations of first approximation, the Lyapunov's stability conditions are always satisfied for the helical and annular equilibrium states of the rod.
根据一次近似扰动方程判断，弹性杆的螺旋线状态和圆环状态恒满足Lyapunov稳定性条件。 - We proved in the sense of first approximation that the Euler's stability conditions of the helical rod in the space domain are the necessary conditions of Lyapunov's stability in the time domain.
在一次近似意义下证明了螺旋杆在空间域内的欧拉稳定性条件是时域内Lyapunov稳定性的必要条件。 - The theoretical results obtained in the first approximation of the toroidal effect are basically consistent with the experimental data, and can be generalized to be used in the case of a poloidal current with a definite kind of profile.
在一级环形效应近似下得到的理论结果，基本上与实验数据一致，并且可以推广使用到具有一定类型极向电流分布的情况。 - Using the method of homotopy perturbation, the approximation of the solution for the mode is obtained. And compared to the special case for the exact solution of the model, the first approximation solution from the method is agreement well with the exact solution.
利用同伦摄动方法，得到了该模型解的近似展开式，通过与特殊情况下的精确解比较，得到的一级近似解具有较高的精度。 - It is emphasized in this paper that the linear model of the rotor systems supported by hydrodynamic lubricated bearings should be viewed as the first approximation or linearization of the original non-linear system because of the non-linear characteristics of the hydrodynamic forces of bearings.
指出应将受非线性动压油膜力作用的转子－轴承系统的线性力学模型视为原非线性系统的第一次近似或线性化的结果。 - Based on the first approximation shell theory, the process and method of mathematics modeling for a four-node quadrilateral shell element is described in detail. The finite element analysis model of laminated plates and shells is derived, and the computer model based on software engineering is presented.
按一次板壳理论，以四边形四节点单元为例，介绍了其数学建模的过程与方法，导出了层合板壳有限元分析模型，并给出了基于软件工程的计算机逻辑模型。 - The relationship between geometric behavior of the helix and the external force and torque was analyzed, and a stability criterion of helical equilibrium in analytical form was derived in first approximation.
文中分析了螺旋线的几何特性与作用力和力矩之间的相互关系，并导出螺旋线平衡的一次近似解析形式稳定性判据。 - The field equations containing higher than second derivatives of the metric are obtained by adding the squared Weyl conformal Curvature term to the action for the Einstein theory of gravity. The Newtonian limit is given in first approximation and some new results are discussed.
在Einstein引力作用量中引入Wevl张量的平方项，得到有度规张量高阶导数项的引力场方程，考虑其弱场线性近似解，给出了牛顿极限，并讨论了某些新结果。 - On some theorems of stability determined by first approximation
关于按第一近似决定稳定性的定理 - Will be converted into equivalent temperature contraction, that contraction is equivalent to lowering the deformation temperature to simplify a number of methods, first approximation, taking into account the effects of shrinkage stress, so that greatly simplify the calculation process.
将收缩换算成当量温差，即收缩变形相当于降低若干温度的简化方法，一次近似，考虑了收缩应力的影响，使计算过程大为简化。