查询词典 harmonic analysis

Further more,we compute the asymptotic expansion of sums involving generalized harmonic number by singularity analysis method.

进一步地，利用奇异性分析方法，求出涉及广义调和数的一些和式的渐近展开。

Comparing with the conventional algebraic method, with Circle Diagram Analysis it is easier to obtain and understand some conclusions of Fourier algorithm, for example, the phase and the amplitude of a certain order harmonic.

与代数方法相比较，采用圆图分析法更容易得出和理解富立叶算法的一些结论，如可一次求出某次谐波的幅值与相位。

Firstly, this paper researched the mechanism of tubing string vibration when natural gas flows in horizontal well tubing string. Secondly, established whole tubing string undamped and damped vibration system model according as reasonable assumption data of one horizontal well. Apply finite element analysis software to calculate tubing string natural characters, simple harmonic dynamic behavior of stable gas production and nonlinear dynamic behavior. Finally, this paper carried out the safety varied frequency of gas well and the method of vibration reduction.

本文首先从理论和数值模拟研究了天然气在水平井油管柱内的流动诱发油管柱振动的机理，然后在合理假设的基础上结合某水平井数据建立了全井段油管柱无阻尼和有阻尼振动系统模型，利用有限元软件计算分析了油管柱固有特性、稳产简谐动力学响应和非线性动力学响应，针对油管柱振动规律提出了天然气安全调节频率范围和减振措施。

For nonlinear harmonic oscillators systems of coordinate coupling and momentum-coupling, one obtains a group differential equations for physical parameters about flow parameter by the numerical analysis method, one finds this method can diagonalize the Hamiltonian.

通过数值分析物理参数随流参数变化规律，给出了对角化的哈密顿量。

The problem of unbalance load on pulse generator is discussed by means of methods of analysis on harmonic electromagnetic moment during stable and transient state.

剖析了不平衡负载及缺相极端情况下，发电机各次稳定和瞬变谐波电磁力矩对转子系统的影响。

Spectrum analysis and Total Harmonic Distortion of output voltage and electromotive force of generator are also achieved.

发电机电动势及输出电压的谐波分析、频谱分析和总谐波歧变率分析。

The modal and harmonic response analysis was performed by ANSYS 9.0, and then the elliptic motion locus of the stator was plotted and discussed.

在设计的电机结构中，给出了压电陶瓷的极化、分布和驱动方式，运用有限元分析软件ANSYS9.0对定子进行了模态和谐响应分析，并运用振动理论推导了定子齿上的椭圆运动轨迹方程。

The above analysis may readily be extended to general plane disturbances not necessarily harmonic.

上面的分析可以很容易地引申到普遍的而不一定是简谐的平面扰动。

In chapter two, harmonic spectra analysis manifests that filleting the whole geometric model with constant fillet radius i.

在这些研究的基础上，提出了分析几何模型自动建模的新方法。

In traditional analysis method, the harmonic approximation is employed, and an effective capacitance of varactors during one period is calculated by the large-signal nonlinear analysis.

在传统的谐波平衡近似方法中，通过大信号非线性分析方法可以计算出一个周期内可变电容的有效电容值。

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％。