查询词典 harmonic analysis

We present quantum mechanical vibrational computations beyond the harmonic approximation from effective second order perturbative and variation perturbation treatments defined as static approaches, as well as vibrational analysis from density functional theory molecular dynamics trajectories at 300 and 600 K.

利用超简谐振动近似的有效二阶微扰法(VPT2)和变异微扰法两种静态方法，以及在300和600K下的密度泛函分子动态轨线振动分析方法进行量子力学的振动计算。

Theoretical analysis and computer simulation show that this method is effective in extracting harmonic signals provided that signal to noise ratio is not very low.

理论分析和仿真实验表明，在信噪比不太低的情况下，该方法对提取淹没在混沌和噪声背景下的谐波信号非常有效。

According to the computational stability analysis conducted to the linear term time difference scheme in simple harmonic motion equation, one new semi-implicit integration scheme also is designed. By adopting a kind of revised time-explicitdifference scheme to these linear terms still included in spectral model governing equations, this defect of spectral model only partly used in semi-implicit integrating scheme, can be overcome to some degree.

以简谐振动方程中线性项时间差分格式对其计算稳定性影响为理论依据，本文设计了一种新谱模式半隐式时间积分方案，此方案通过对一般谱模式求解框架中那些隐含的线性项采用了一种显式修正的差分格式，可有效克服其国际谱模式半隐式时间求积方案实质上只是部分应用了半隐式差分格式的问题。

It can be shown that the base function for the optimal analysis of PSV data is HSV eigen-function deduced from the proper or thogonal decomposition of the geomagnetic model data instead of the lower degree spherical harmonic function in common use.

统计学意义上最优的分析方法不是直接对PSV数据作低阶轴对称球谐分析，而是通过对地磁场模型数据的特征正交分析，得到表征HSV的特征函数，再用它们去分析PSV形式的数据。

Spherical harmonics is of importance for spherical signal analysis. This paper matches shape similarity among images by a spherical harmonic descriptor.

摘要球面调和分析是球面信号分析的重要工具，本文采用球面调和描述子对图像进行形状匹配。

In the study of radial sphygmogram on the patients with ischemia heart disease, Our analysis of the harmonic C4 of left Cun showed significant difference between the two groups (p=0.0039). And the optimal contact pressure of left Cun was smaller than others (p=0.013). The result was approval for the TCM theory "Left cun correspond to heart".

在缺血性心脏病患者的脉波图研究中，以观察组与对照组相比，频域分析的结果显示在仅左寸脉波的C4有显著差异(p=0.0039)，两组最佳取脉压力的比较，也显示仅在左寸有显著差异(p=0.013)。

Because the portal frame is also used in the rig for bogie fatigue strength testing, in which the imposed load is harmonic, the modal analysis is necessary. The fundamental vibration mode shapes and corresponding frequencies are calculated to validating that the natural frequencies of the structure have enough difference comparing to the load frequency, so sympathetic vibration can be avoided.

由于龙门架还要在疲劳试验台中用来进行转向架的疲劳试验，因此对龙门架进行了模态分析，计算龙门架结构的固有频率和振型，确保龙门架的固有频率远离转向架疲劳试验的加载频率，避免在试验中发生共振。

The principle of MUSIC algorithm and theoretical analysis of the spectral separate frequency and frequency detection threshold are included. MUSIC algorithm compared with FFT based algorithm for harmonic frequency estimation using matlab simulation platform .

给出了MUSIC算法的基本原理，对MUSIC算法的频谱分辨能力和频率检测门限进行了理论分析，在Matlab仿真平台下对MUSIC算法和FFT算法的频率估计性能进行了比较。

Curricular content accumulate contained rich academic ABC -- foundation of music theory foundation, harmonic foundation, appreciation foundation, musical form analysis, chorally foundation, instrumental music, aesthetic is waited a moment, because this sightsinging experienced ear is in integral knowledge structure of the student,have very important place.

课程内容蕴含了丰富的理论基础知识——乐理基础、和声基础、欣赏基础、曲式分析基础、合唱基础、器乐、美学等等，因此视唱练耳在学生的整体知识结构中占有非常重要的地位。

This paper describes a meshing analysis of the contrate harmonic gear drive which can quickly select the optimum transmission and determine the corresponding meshing parameters and structure parameters.

建立的端面谐波齿轮传动的啮合分析软件，可以较快地选取最佳传动方案，确定相应的啮合参数和结构参数。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。