查询词典 spectrum analysis

Some methods for the determination of precious metals such as classical electroanalysis and atomic absorb spectrum analysis are poor precision and detection limit so that they can not be satisfied with modem times' analysis need.

在贵金属元素的众多分析检测方法中，经典的极谱法和原子吸收法等精确度和检测限差，难以满足现代分析的要求。

Fluorescence analysis is an important and effective spectrum analysis.

荧光光谱分析是一种重要且有效的光谱化学分析方法。

The metallography observation, scanning electron microscope and power spectrum analysis were adopted to analysis cast blank with production flaw.

中文摘要：通过金相观察、扫描电镜和能谱分析等检测手段，对有生产缺陷的铸坯进行分析。

Frequency estimation and spectrum analysis are the foundation of the analysis of complex communication signals in electronic reconnaissance system.

确定信号的波达方向是电子侦察系统的一个重要方面。

Through the residual signal spectrum analysis and statistics analysis after de-noising, the characteristic frequency of the noise signal was obtained.

通过计算机仿真和实例分析对小波包降噪方法进行验证，表明小波包分析在汽车发动机降噪中有效性。

However, the response spectrum analysis method advanced in this paper is an important contribution, because time-history analysis has to carry through before even for the relatively rigorous and complete solution of linear structures.

在国外减震结构在基本理论上已经比较成熟，但是，本文提出的多反映谱法分析减震结构的方法仍然是一个重要的贡献，因为此前，减震结构进行较准确弹性分析也只能采用时程分析法。

The existence of intraseasonal variability of SST in the whole SCS is confirmed by different statistical methods, like Singular Spectrum Analysis and Morlet Wavelet Analysis. It explains roughly 20-30% of the total sample variance .

对OISST资料进行奇异谱分析和Morlet小波变换分析的结果表明，南海全区SST存在显著的季节内变化是确定无疑的，而且是一种强信号，它的方差可以达到样本总方差的20-30％。

We adopted the spectrum analysis method and the BAYTAP_G method to analyze the geoelectric potential data at the Niijima station during 1998～2000 After the quantitative analysis of the tide response of geoelectric potential changes at the above station, we obtained some main characteristics of the tide response. Besides the tidal components with various periods such as diurnal tide, semidiurnal tide, and so on, semimonthly and semiyearly variations of tide response were also detected from the geoelectric potential data at the Niijima station.

本文通过采用频谱分析和BAYTAP-G方法对位于日本伊豆群岛的新岛台跨度达三年（1998～2000年）的地电场的观测资料进行了分析研究，对该台地电场的潮汐响应进行了定量提取与分析，得到了地电场潮汐响应的一些主要特征，例如除了存在全日分潮、半日分潮等不同周期的潮汐成分外，还呈现出明显的半月、半年等不同周期的活动规律。

We adopted the spectrum analysis method and the BAYTAP-G method to analyze the geoelectric potential data at the Niijima station during 1998~2000. After the quantitative analysis of the tide reaponse of geoelectric potential changes at the above station, we obtained some main characteristics of the tide response. Besides the tidal components with various periods such as diurnal tide, semi-diurnal tide, and so on, semimonthly and semi-yearly variations of tide response were also detected from the geoelectric potential data at the Niijima station.

本文通过采用频谱分析和BAYTAP-G方法对位于日本伊豆群岛的新岛台跨度达三年（1998~2000年）的地电场的观测资料进行了分析研究，对该台地电场的潮汐响应进行了定量提取与分析，得到了地电场潮汐响应的一些主要特征，例如除了存在全日分潮、半日分潮等不同周期的潮汐成分外，还呈现出明显的半月、半年等不同周期的活动规律。

As a kind of high-rise structure , tower building is sensitive to wind load; TMD can increase the security and reliability of structure observably with simple mechanism; in power spectrum analysis matrix formula, coefficient matrix can be extended for MTMD optimize analysis, complementarity with time domain method.

标志塔属典型高耸结构，对风荷载作用敏感；TMD机械构造简单，可以显著提高结构安全性和可靠性；谱分析矩阵表达中，将系数矩阵、增广矩阵进一步扩充，可同时进行多TMD参数优化，效率较高，与时程分析互为补充验证。

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。