Estimates for discrete spectrum of a system;
某类系统离散谱的上界估计
Some oscillatory criteria and discrete spectrum criteria are given,and we can apply them to the ordinary differential equations.
文中得到几个振动性准则和离散谱准则，并将这些结果应用到常微分方程。
Then the paper presents a discrete spectrum correcting method——Algebra method,from the mathematical definition of window function, and deduced to several discrete spectrum correcting formulas of common window.
该文从窗函数的数学定义出发,给出了一种基于窗函数的离散谱校正方法——代数法,并推导出几种常用窗的离散谱校正公式。
A new method is put forward for automatically identifying and modifying the parameters of the two close frequency components in discrete spectrum based on ICM.
在理论概括比值法原理的基础上 ,提出一种新的自动识别和修正离散频谱中两邻近谱峰参数的方法。
A new method to identify and correct the parameters of intensive frequency components automatically in the discrete spectrum was presented.
提出一种自动识别和校正离散频谱中邻近谱峰参数的方法·该方法不仅保留了比值法计算简单的特点 ,而且既能识别间距不到一个频率分辨率的密集频率成分 ,又能校正峰间距为 1～ 6个频率分辨率的邻近谱峰参数 ,从而与比值法相辅相成 ,形成一套完整的离散频率信号分析方法·数值仿真结果证明了方法的有效性
At present, the single harmonic component and far spaced multi frequency components in discrete spectrum can be identified by using the methods of spectrum correction, and its frequency, phase and amplitude can be corrected automatica.
目前频谱校正理论已经能准确地自动识别出离散频谱中的单频成分和间隔较远的多频率成分 ,并自动校正其频率、幅值和相位 ;对多频成分谱线干涉中的单频成分能自动判定 ,且能用参数识别法对两个密集频谱进行校正 ;对于密集频率成分信号 ,可用频谱细化的方法 ,将发生谱线干涉的各谱峰分离开 ,再进行识别和校正。
Anti-noise performance of energy centrobaric correction method using four points for discrete spectrum
离散频谱四点能量重心校正法及抗噪性能分析
Modulated FFT and its application in the discrete spectrum correction
调制FFT及其在离散频谱校正技术中的应用
Improved SPIDER signal processing method based on discrete spectrum correction
一种基于离散频谱校正的SPIDER信号处理改进方法
SOME QUALITATIVE PROPERTIES OF FREQUENCY SPECTRUM AND MODES OF DIFFERENCE DISCRETE SYSTEM OF MULTIBEARING BEAM
多跨梁离散系统的频谱和模态的定性性质
Time-Frequency Analysis of Hilbert Spectrum Based on Maximal Overlap Discrete Wavelet Packet Transform
用最大重叠离散小波包变换的Hilbert谱时频分析
high frequency ionization chromatographic detector
高频电离色谱检测器
Effect of smoothing by spectral dispersion on the spatial spectrum of focal spot
光谱色散匀滑对焦斑光强频谱的影响
The numerical results demonstrate that the larger the zone of timing jitter and the higher the frequency, the less proportion the discrete PSD component is in the total PSD.
数值计算结果表明，随时间抖动范围增大和频率提高，离散功率谱分量所占比例下降。
Spectrum Characteristic of Dissipative Compact Schemes and Application to Couette Flow
耗散紧致格式的频谱特性研究与应用
Spectrum Analysis of Spurious Signals in Direct Digital Frequency Synthesizer Due to Phase Truncation
DDS相位舍位杂散信号的频谱分析
Analysis of the spurious spectrums in direct digital frequency synthesizers
直接数字频率合成技术杂散信号频谱性能分析
Embedding Theorems and the Discreteness of the Spectrum of a Class of Differential Opertors;
嵌入定理及一类微分算子谱的离散性
complex-frequency domain analysis of discrete-time system
离散时间系统的复频域分析
Frequency-supervised-breakpoint based discretization algorithm
连续属性的频数监督断点离散化技术
Research on selective optical amplification of Brillouin spectrum of weak scattering signals in water
水中微弱光散射布里渊频谱选择性光放大研究
Analysis of wide bandwidth THG by using angular spectral dispersion
采用角谱色散补偿法的宽带三倍频方案分析
Simulation and experiment on spectral regrowth of QPSK/OQPSK signals
QPSK/OQPSK调制信号频谱扩散问题的仿真及实验研究
Spectrum-Sliced Wavelength Division Multiplexed Passive Optical Networks and Effects of Chromatic Dispersion
频谱分割波分复用无源光网络及色散影响