The effects of content of Nb2O5 on refractive index,stability,optical band gap and energy band gap of the glasses are discussed.
利用样品的吸收光谱计算了其直接允许跃迁、间接允许跃迁及能量带隙。
In this paper,according to the characteristics of spacial grid structures,a method of damage diagnosis is presented by the dynamic response under fast sine sweep motivation based on the analysis of frequency band energy of wavelet packet decomposition and fuzzy cluster method(FCM).
本文针对网格结构的特点,利用其在快速正弦扫频激励下的动力响应,基于小波包分解频带能量分析和模糊聚类法,提出了一种适合于网格结构的损伤诊断方法。
It is pointed out that there is a boundary problem for most frequency band boundary frequencies: the frequency band energy leaps at the left and right sides of the boundary frequencies,and the leap directions are reverse.
在边界频率左、右两侧,频带能量有巨变现象,并且能量的跳变方向相反。
A fault diagnosis method based on wavelet packet analysis frequency band energy was proposed this paper .
文章介绍了鼠笼式异步电动机常见的故障及其诊断的重要性,采用了改进型小波包算法从电气和机械方面提取信号的故障特征,并提出了一种基于小波包分析频带能量的故障诊断方法。
Objective To explore the effect of band power and wavelet packet entropy in the recognition of hand imagery.
目的探讨脑电信号频带能量和小波包熵在识别左右手想象运动中的作用。
A method for single trial on-line classification of imaginary hand movements,based on band power and phase synchronization derived from EEG,is proposed.
提出了基于信号频带能量和相同步作为脑电特征向量,实现对左右手运动意识任务的分类方法。
The gear corrosive pitting recognition based on wavelet packet analysis and frequency-band energy decomposition;
基于小波包分析和频带能量分解的齿轮点蚀故障识别
In order to avoid above disadvantages of wavelet ridge, a new diagnostic method based on wavelet frequency-band energy is proposed in this paper.
为克服小波脊线在诊断异步电机断条故障过程中存在的数学定义复杂、迭代逼近运算量大等缺点,应用Morlet连续复值小波,多尺度地、中心频率等间隔地分解了实测的同型正常电机和有一根断条的故障电机启动电流信号,分析和比较了对应尺度下的频带能量后,找出了上述电机两种状态的信号能量差异;定义了频带能量比(RFBE)的概念,得出断条故障电机的RFBE比良好状态的至少大2倍的定量判据,并据此提出了基于RFBE的电机断条故障诊断新方法。
Coal-rock interface recognition based on multiwavelet packet energy
多小波包频带能量的煤岩界面识别方法
The frequency band energy method based on the wavelet analysis is used for getting the characteristics of the running noise.
同时,运用基于小波分析的频带能量法提取运行噪声的特征。
New wavelet packet-band energy in electrical fault diagnosis of broken bars in the study
新型小波包频带能量法在电机断条故障诊断中的研究
Application of Frequency Band Energy Character Method in Cutter Wear Monitoring System Using Acoustic Emission
频带能量特征法在声发射刀具磨损监测系统中的应用
Fault Diagnosis for Diesel Valve Drain Based on Euclidean Closeness Degree and Frequency Band Energy Decomposition Using Wavelet Packets
基于小波包频带能量分解和欧氏贴近度的柴油机气阀机构故障诊断
Feature extraction for passive sonar target based on critical band spectrum energy
被动声纳目标临界频带频谱能量的特征提取
Audio Retrieval Based on Dynamic Range of Sub-band Energy Feature
基于音频子带能量动态范围的快速音频检索
Methods of measurement of magnetic properties of magnetic steel sheet and strip at medium frequencies
GB/T10129-1988电工钢片(带)中频磁性能测量方法
Distribution Network Fault Line Detection Using the Full Waveband Complex Relative Entropy of Wavelet Energy
利用全频带综合小波能量相对熵的配网故障选线方法
Bus Capacity Bus capacity is the maximum load that can be carried on a system without causing degradation of the generator frequency to less than a prescribed level (usually 59 Hz in a 60 Hz system).
母排容量母排容量是指在发电机频率不被压低的情况下，系统所能带动的最大负载。
Some Problems of Measurement Bandwidth in Time Domain Frequency Stability
频率稳定度时域测量带宽的若干问题
Telemetry Performance Analysis of DS/FH Hybrid Spread Spectrum Signal
直扩/跳频混合扩频信号测量性能分析
Performance Analysis of Differential Hopping System Against Partial-band Jamming
差分跳频系统抗部分频带干扰性能分析与仿真
Performance of convolutionally coded differential frequency hopping systems in partial-band jamming
卷积码差分跳频系统抗部分频带干扰的性能
Apparent Stress Obtained from Broadband Radiated Energy Catalogue and Seismic Moment Catalogue and Its Seismological Significance
由宽频带辐射能量目录和地震矩目录给出的视应力及其地震学意义
The gain factor and energy conversion efficiency quasi- stationary stimulated electronic Raman scattering with focused broad-band pump lasers
宽频带聚焦泵浦准稳态受激电子喇曼散射的增益因子和能量转换效率
Performance of Partial Band Jamming-Resistance in UWB Communication Technology
超宽带通信技术抗部分频带干扰性能研究
They come with a lot of inviting functions.
数字视频产品带有很多诱人的功能。
