The developing process of a suit of certified reference materials of nitrogen cast iron for spectrum analysis was introduced.
介绍一套含氮铸铁光谱分析标准物质的研制过程。
A fast method for spectrum analysis and interpolation using artificial neural network (NN) for the microwaves surveying system is studied.
本文研究了在微波探测系统中，利用人工神经网络做谱分析和插值的快速方法。
The standard method for spectrum analysis in digital signal processing is the discrete Fourier transform(DFT), typically implemented using a fast Fourier transform(FFT) algorithm.
数字信号处理中标准的频谱分析方法是离散傅立叶变换（DFT），典型的实现方法是快速傅立叶变换（FFT）。
For example, trained observers obtain a very large amount of information about a star mainly from the accurate analysis of the simple lines that appear in a spectrum.
例如，经过训练的观察者主要通过对光谱中出现的简单线条的精确分析来获取关于恒星的大量信息。
They used spectroscopy for their analysis: a technique that breaks the light from celestial objects into a spectrum with telltale emission lines indicating which elements are present.
在他们的研究中使用了光谱分析。 光谱分析原理是将天体光源通过光谱仪，通过光谱被减弱的程度，得出样品中元素含量。
For uniform time sampling, the level of frequency fluctuation will greatly influence the results of spectrum analysis.
采用等时隙采样方法，频率随机波动的大小则会严重影响谱分析的结果。
A new method of infrared spectrum analysis based on support vector machine for mixture gas was proposed.
介绍了一种基于支持向量机的混合气体红外光谱组分浓度和种类分析的新方法。
The accuracy of traditional spectrum analysis for the diagnosis of reciprocating pump valve is not satisfied for the interference of the noise and the vibration of the adjacent parts.
往复泵泵阀振动信号的常规频谱分析，由于故障特征信息往往被淹没于强大的噪声以及相邻部件的干扰而使诊断精度大打折扣。
Taking rigid disk surface as an example, fractal parameters are obtained by means of power spectrum and structure function, providing a proper geometric model for further contact analysis.
实验结果表明，分形维数能很好地表征表面轮廓，可为进一步的接触分析提供更合理的几何模型。
Objective An analysis and measurement system was developed for use with shock spectrum testing machine for testing spaceflight products.
目的考核产品的耐冲击能力，为冲击谱试验机研制一套测试分析系统。
The tests proved that this algorithm is correct and it can provide a better method for shock response spectrum analysis in engineering practice.
通过试验验证了算法的正确性，为工程实践中的冲击响应谱分析提供了一种通用性相对较好的分析方法。
This paper introduces a new detecting array for micro multichannel imaging spectrum analysis system.
介绍一种新颖的微型多道成像光谱分析系统用的探测列阵。
Aiming at the problem of testing parametric fault in analog integrated circuits, an approach based on power spectrum correlation analysis for diagnosing parametric faults is presented.
针对模拟集成电路参数型故障的测试难题，提出了定位模拟集成电路参数型故障的功率谱相关分析方法。
ZFFT(ZoomFFT) is a method used for analysis of part spectrum, it can reduce calculation.
ZFFT是对频谱局部特性进行分析的一种方法，它可降低运算量。
Power spectrum analysis is always used in spectrum analysis of cavitation noise. However, it is obviously unfit for research on the transient signal such as cavitation noise.
空化噪声的谱分析一般采用功率谱分析，而功率谱分析在研究空化噪声这种具有很强突变性的信号具有明显的缺陷。
Topographical methods and geologic methods get the data about sedimentation rate spectrum with different ability for information and analysis.
据此，文章讨论了地形学方法和地质学方法在提取和分析沉积速率谱方面的潜力和局限。
It Contains system construction, measurement environment requirement, FFT application in microcomputer, and spectrum analysis for vibrations in practical engineering.
系统的构成、对测试环境的要求、FFT在微型计算机上的实现，以及在实际工程中振动频谱分析的应用。
Spectrum analysis for vortex signal processing was discussed on the basis of simulating and analyzing the effect of sampling in non complete periods on spectrum arithmetic.
在仿真分析非整周期采样对谱分析法影响的基础上，对基于谱分析的实际涡街流量信号处理方法进行了有益地探讨。
This paper introduces the designing way and the programming methods of the CAI software for periodic signal spectrum analysis and demo .
介绍了“周期信号频谱分析演示CAI软件”的设计思路和编程方法。
For seeking after background spectrum, an iterative technique called gradual annihilation method is used in the module for analysis of differential spectrum.
在微分谱分析模块中采用了迭代技术求全谱本底，称之为逐次淹没法。
In this paper, by using DFT filter bank and ZFFT, we present an algorithm of spectrum analysis for the wide band signal.
本文利用DF T滤波器组、ZFFT，提出了一种宽带信号的实时谱分析方法。
The Spectrum analysis for studying economical Swings is discussed in this article.
本文讨论经济波动研究的谱分析方法。
The modulation principle and spectrum analysis for SPWM were expatiated in detailed.
阐述了SPWM的调制原理与频谱分析。
According to the normal law, we put forward an estimate method of the measuring result uncertainty for Spectrum Analyser. It is useful for uncertainty analysis of other calibrations.
本文根据正态分布的规律，提出了对频谱分析仪参考电平测量结果扩展不确定度的一种估计方法，对其他计量测试项目的不确定度分析有一定参考价值。
The principle of conservation of wave action flux is used here for the analysis of transformation of wave spectrum on sloping beach under the action of current.
本文将波浪作用通量守恒原则应用于缓坡上在水流作用下的波谱变形，并与规则波的计算结果作对比。
One of the spectrum analysis methods suitable for speed information analysis in the noise radar signal is also introduced.
文章还介绍了一种适合于分析噪声雷达信号中目标速度信息的谱分析方法。
The rock ultrasonic spectrum analysis is an important method for the rock dynamic experiment, it has wide applied prospect.
岩石超声波谱测试技术是目前岩石力学实验研究的一种重要方法，具有广阔的应用前景。
The rock ultrasonic spectrum analysis is an important method for the rock dynamic experiment, it has wide applied prospect.
岩石超声波谱测试技术是目前岩石力学实验研究的一种重要方法，具有广阔的应用前景。
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