first approximation
第一次近似;第一近似值;初步近似;一次近似值;一级近似;首次近似
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。
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.
The first-order ordinary differential equations of integral method for hypersenic flow past blunt bodies at small angles of attack are derived.
本文建立了高超音速钝体小攻角的绕流积分关系式法的一级近似常微分方程组。
An Approximative Method of Calculating Energy Level And Wave Function of Hydrogen Atom;
氢原子能级及波函数的一种近似计算法
Its simplified form may be cinsistent with the relation of the duration magnitude M approximately.
它的简化形式可以和持续时间震级的表达式近似一致。
Deducing the Approximate Formula of Arch Field Area by Making Use of Taylor Series
利用Taylor级数计算弓形面积的近似公式
A similar cloth of rayon.
一种近似于人造丝的布
It is not an approximate value.
它不是一个近似值。
The condition of being parallel;near similarity or exact agreement in particulars;parallelism.
平行状态，近似，类似相近的状况；非常相似或在细节上完全一致；类似
A Kind ofε-approximation Algorithm for the Exploration Problem with N Vehicles
N车探险问题的一种ε-近似度的近似算法
The extended representations of power progression is only an approximate expression, but it is adequate for engineering use.
幂级数的展开式虽是一个近似的式子,但其精确性巳能满足工程上的要求。
Antihydrogen formation in the laser-assisted positronium- an tiproton collision is investigated in the first Born approximation.
在一级玻恩近似下 ,研究了在激光辅助的电子偶素 反质子碰撞中的反氢合成 .
Aapproximation of Fourier inverse integral using Fourier transform approximation for amplitude of harmonics in a finite Fourier series summation.
富氏级数中之谐波成份以富氏转换近似并以有限级数和近似富氏逆转换。
Here we carry out computations up to the second degree only.
在这里，我们只把计算进行到第二级近似为止。
AN APPROXIMATE ANALYSIS AND THE ERROR PROBLEM ON THE MULTISTAGE AMPLIFIER AT HIGH FREQUENCIES
关于多级放大器中高频段近似分析及误差问题
Finding the Solution of Electromagnetic Fields of a Rotating Conductor by Progressive Approximation;
用逐级近似法求解导体转动时的电磁场
Dynamics of the Two-level System Coupled with Single Model Field Beyond the Rotating Wave Approximation
超越旋转波近似的单模二能级系统动力学