查询词典 spectrum analysis

By scanning electron microscope and instrument of energy spectrum analysis, the external surface, composition, microstructure of specimens were studied and analyzed.

将几种常见金属与做过阳极氧化处理的1Cr18Ni9Ti进行反应器现场挂片试验。

The vibration signals from a free vibrated cantilever beam are carried on Fast Fourier Transformation and spectrum analysis.

采集悬臂梁自由振动下的声发射信号，并对信号进行快速傅里叶变换和频谱分析。

How to make ferrous spectrum analysis system networked is emphasized in this paper.

重点研究了铁谱分析系统网络化的实现问题。

This system can be applied to detection of the pesticides residues on crops and fluorescence spectrum analysis.

它可用于对粮食作物中的农药残留的检测和荧光光谱分析。

Methods The semitive utterance studies were formant of vowels and voice onset time of consonant, which were analyzed by speech spectrum analysis system.

方法应用语音频谱分析系统分别对正常儿童、腭裂术前患者和腭裂术后患者的元音共振峰频率值和辅音嗓音起始时间的频谱特点进行分析。

Based on this theory,and combined with Fourier transform frequency spectrum analysis and curve fitting ,the formula and arithmetic of equivalent mainfrequency for the frequency conversion measurement are derived.

本文正是基于这种变频法的思想，结合傅立叶变换频谱分析法和曲线拟合方法推导了介质损耗参数的工频等效计算公式和算法。

In order to measure jitter of gain-switched laser precisely, we analyze theoretically the math model and measurement principle of harmonic spectrum analysis used to measure laser pulse jitter.

为了能够精确测量增益开关激光脉冲的抖动，应用傅里叶变换和自相关函数，理论分析了谐波频谱分析法测量激光脉冲抖动的数学模型、测量原理，修正了David A。

Based on the heterodyne principle,the spectrum analysis can realize a signal frequency range of 1～30MHz.

它依据外差原理，实现频率范围为1～30 MHz的信号频谱分析。

Time domain signal is transformed to the frequency domain signal by FFT. Dispersion curve is obtained from phase angle that is calculated by the frequency spectrum analysis. A compound dispersion curve is obtained from the dispersion curves intervale, and the representative dispersion curve is used to evaluate dimensions and quality of soil grouting body.

由FLAC所得不同点位的速度历时透过快速傅立叶转换后，得到频率域讯号，再经过频谱分析计算其相位角，得到其频散曲线，由不同间距的频散曲线集合成复合频散曲线，再绘制成一"代表性"频散曲线，以评估灌浆体品质及范围。

H. Meckl et al〔166〕—〔169〕, we propose an approximate inverse dynamics method featuring spectrum analysis and then discuss the restrictions.

2在柔性机械臂逆动力学方面，针对带一个转动铰的简单柔性机械臂，在Meckl等人工作的基础上提出了基于谱分析的构造性的近似逆动力学方法，并分析了应用限制条件。

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。