1) frequency band energy criterion
频带能量准则
2) energy criterion
能量准则
1.
According to characteristics of the plane rotational fracturing mode of consequent rock slope, the three-dimension space model is built by the use of energy criterion and damage mechanics.
针对顺层岩质边坡的平面旋转破坏模式的特点,利用能量准则和损伤力学的观点建立三维力学模型,给出了在自重、惯性力(如地震)等荷载共同作用下,顺向边坡岩体损伤区和滑移区的力学性状及破坏区域。
2.
The basic idea was to discrete the structure and find the load function according to the energy criterion of buckling and the principle of random displacement method.
先将结构离散为一个有限自由度系统 ;然后根据有限自由度系统平衡稳定性的能量准则和随机位移法的基本原理 ,建立符合能量准则的载荷函数 ,该函数不为零的最小值即为临界载荷 ,由此将稳定问题转化为无约束的多维优化问题 ;最后应用遗传算法求出相应于最优解的目标函数值 。
3.
The energy criterion of classical stability theory is used to analyze the stability of test machine and rock sample system.
采用经典稳定性理论中的能量准则 ,分析了试验机 -试样系统的稳定性 ,得出了获得试样的荷载 -位移全过程关系曲线的条件 ,认为试验机的刚度及加载条件对试验结果具有重要影响。
3) energy principle
能量准则
1.
Prediction of fatigue life based on energy principle for diesel engine with aluminum piston;
基于能量准则的铝质活塞柴油机寿命预测
2.
The energy principle and its calculating method are introduced, and tests of thermalfatigue and high temperature low cyclic fatigue with cylindrical specimens made of 2A80 alumi-num alloy with different annular notch are made.
介绍了能量准则及其计算方法,并对用2A80铝合金材料制成的带有不同环状缺口的试件进行了热疲劳和高温低周疲劳试验与应力应变分析计算。
4) Frequency band energy
频带能量
1.
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。
2.
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。
3.
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。
5) band power
频带能量
1.
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。
2.
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。
6) frequency-band energy
频带能量
1.
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
2.
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。
补充资料：频带
1.在电磁波或声波波谱中的一段波长范围。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条