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instantaneous parameter
相关语句
  瞬时参数
     In HHT theory, Innovations were brought up in signal decomposition, instantaneous parameter computation and time-frequency analyses.
     在HHT理论结构中,在信号的分解、瞬时参数求取、时频分布各方面的实现过程均有突破。
短句来源
     This paper put forward using Wavelet Instantaneous Parameter Methods (WIPM) and the modulus maxima method of the Wavelet Transform(WTM),respectively, for time delay estimations of narrow-band and wide-band multi-mode(A0 and S0)Lamb waves. The methods are much higher resolution than Hilbert Instantaneous Parameter Methods(HIPM). WTM's resolution is the highest;
     提出了采用小波瞬时参数法和小波变换模极大值法分别对高频窄带和低频宽带超声多模式(A0模式和S0模式)兰姆波进行时延估计,与希尔伯特瞬时参数法比较,它们的估计精度明显的高于希尔伯特瞬时参数法,其中小波变换的模极大值法对时延估计的精度最高,小波瞬时参数法次之,希尔伯特瞬时参数法不能很好的估计多模式时延。
短句来源
     The instantaneous parameter estimation for communication signals is very important,for such parameters are abundant of information.
     通信信号的瞬时参数包含丰富的信息,提取瞬时参数具有很重要的意义。
短句来源
  “instantaneous parameter”译为未确定词的双语例句
     Research of Instantaneous Parameter Estimation for Communication Signals
     通信信号瞬时参数的提取方法研究
短句来源
     The author using the linear time-frequency theorem such as the short-time Fourier transform, wavelet transform and S transform (include generalized S transform) computes time-frequency parameter. According to the computed time-frequency parameter result, the author not only develops the method to increase the resolution and signal-noise ratio, but also extract the instantaneous parameter and determine the depth variety of thin layer.
     本论文从线性时频分析理论出发,把短时傅立叶变换、小波变换及S变换(包括广义S变换)用于时频参数的提取,根据时频参数改善地震资料的分辨率、提高地震资料的信噪比、求取瞬时属性参数以及确定薄层的厚度变化。
短句来源
     A simple and reliable micro—acquisition system for instantaneous parameter measuzement of I, C.
     本文介绍了一种简单、可靠的内燃机动态参数微型采集系统.
短句来源
  相似匹配句对
     Research of Instantaneous Parameter Estimation for Communication Signals
     通信信号瞬时参数的提取方法研究
短句来源
     Parameter analysis for instantaneous optimal control of structures
     结构瞬时最优控制参数影响的数值分析
短句来源
     and b was empirical parameter.
     b为经验常数。
短句来源
     estimation of its parameter;
     评定运动模糊的参数;
短句来源
     the pyrolysis of biomass is instantaneous;
     生物质热解过程瞬时完成;
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In accordance with both the energy density function of complex signal and the energy distribution in time-frequency domain, author researched into two equivalent relations: (1) equivalent relation between the instantaneous frequency (or instantaneous phase) of seismic reflection wave group at delay place and the dominant frequency (or dominant phase), and (2) equivalent relation between instantaneous frequency of reflection at any time and the real part of baryecnter frequency of wave-energy...

In accordance with both the energy density function of complex signal and the energy distribution in time-frequency domain, author researched into two equivalent relations: (1) equivalent relation between the instantaneous frequency (or instantaneous phase) of seismic reflection wave group at delay place and the dominant frequency (or dominant phase), and (2) equivalent relation between instantaneous frequency of reflection at any time and the real part of baryecnter frequency of wave-energy density function. In light of the relations, the main characteristic parameters (dominant frequency and dominant phase) that indicate the nature of reflection waveform can be fast obtained by directly using the instantaneous parameters instead of Fourier transform. The feasibility and correctness of this theory were confirmed by forward modeling and the trial computation of real seismic data. The methods for computing the two main characteristic-parameter sections are given. It is pointed out that the main factors influencing the accuracy of the main characteristic parameters are the choice of wavelet type, noise background and the coherence of adjacent reflections. Finally, described briefly is the important role that the two parameter sections play in lithologic and structural interpretations.

本文根据复信号的能量密度函数及能量在时间一频率域的分布特性,研究了地震反射波群延迟处的瞬时频率、瞬时相位与该波的主频、主相位之间,反射波任意时刻的瞬时频率与该波能量密度函数重心频率的实部之间存在的等价关系。依据这种关系,无需做傅里叶变换,直接利用瞬时参数便可快速提取出表征反射波波形特征的主特性参数(主频率和主相位)。通过正演分析和对实际资料的试算,进一步证实了上述理论的可行性与正确性。文中还给出了对这两种主特性参数剖面的计算方法,指出影响主特性参数计算精度的主要因素在于子波类型的选取、噪音背景及相邻反射波的相干程度。最后简要地叙述了这两种参数剖面在岩性和构造解释中的重要作用。

A simple and reliable micro—acquisition system for instantaneous parameter measuzement of I, C.engines is presented in this paper.It has been successfully used in measuring instantaneous temperature of a diesel combustion chamber components.The functions of the system includes:data acquisition and retention,monitor and communication with IBM/PC computer.

本文介绍了一种简单、可靠的内燃机动态参数微型采集系统.已成功地运用于柴油机受热零件动态温度的测量.其功能包括采集、监测、断电后数据自动保持以及与IBM/PC 微机串行通信的功能.数据的保持可达数天甚至数周以上.采样频率为6.7KHZ,数据的存贮量为8K,可方便地扩充至16K,适用于现场实测.

In nuclear data acquisition and analysis system? it is essential to convert instantaneous parameter quickly arid storage them in tie memory. It needs a support of a high-speed transfer interface and software. In this paper, we give several methods and discourse on them in hardware and software, then, we give some actual examples.

在核数据获取和分析系统中,需要将瞬态参数快速转换,存入内存或外存,这需要一个高速传送接口及相应的软件来支持、本文提出了几种设计方法,并就各方法进行比对研究,对于某些方法还给出了具体应用实例。

 
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