Point-wise correlation dimension;
点关联维数;
The variations of the ApEn and the correlation dimension were calculated.
计算近似熵与相关维的变化。
First, the calculation of the correlation dimension of the chaotic analysis method is studied.
首先对混沌分析中的关联维计算方法进行了研究。
To be a utility tool of fractal theory correlation dimension is wi de ly used in status recognition.
关联维作为分形理论的实用工具在状态识别中得到广泛应用;
The results indicated that when the engine gave out the correlation dimension is different from that of working normally.
结果表明,发动机发生故障时的关联维数与其正常工作时的关联维数不同。
Application to fault diagnosis of reciprocating compressor based on emprical mode decomposition and correlation dimension;
将分形几何引入齿轮振动信号的故障分析中 ,用关联维数来刻画振动信号的故障特征。
Thus, the correlation dimension can be taken as the characteristic parameter to identify the working states of the gearbox.
因此,可用关联维数作为区分齿轮箱工作状态的特征参数。
Furthermore, initial neighborhood radius was computed by the estimated noise level based on the G-P saturation correlation dimension method.
初始领域半径的选取采用了基于G - P关联维法的噪声水平的初始估计方法。
Introducing correlation dimension method in the fractal theory and the correlation dimension curve of the synthetic seismic profile is analyzed.
引入分形理论中的关联维方法,对合成地震剖面的关联维曲线进行分析。
Result shows that correlation dimension method of logging curves has more than 92% accuracy for predicting lithology of the sandstone reservoirs.
计算结果表明,应用测井曲线关联维数法预测砂岩储层岩性,其精确度达到92%以上。
By using the methods of phase space construction and correlation dimension, the fractal character of sea level variation along Guangxi coast was analyzed.
采用相空间重构和关联维数方法,研究了广西沿岸月平均海平面变化的分形特征。
Therefore, when deciding tolerances of the process before or after nitriding, the formulas involving the correlation dimension chain must be adopted in calculating.
因此,在确定氮化前后的工序尺寸公差时,应采用相关尺寸链的公式进行计算。
Therefore, describe the fractal feature of acoustic emission time sequence by correlation dimension and research the evolution law of rock damage and failure process.
本论文采用关联维数来描述岩石声发射时间序列的分形特征,研究岩石损伤破坏过程的演化规律。
From the correlation dimension analysis of noise signals of internal combustion engine, it was proved that engine noise signals have an obvious fractal characteristic.
通过对实际测量的内燃机噪声信号的关联维数计算分析,证明了内燃机噪声信号的分形特性。
The influence of noise on the computational precision of correlation dimension is discussed, and iterative singular value decomposition for reducing noise is introduced.
同时研究了噪声对关联维数计算结果的影响,并提出用采样迭代奇异值降噪算法对原始数据进行降噪处理。
By using box dimension, information dimension and correlation dimension, fractal features of Wuyishan Natural and Culture Heritage were studied at a multi-dynamic scale.
利用分形理论中的计盒维数、信息维数和关联维数,采取变换取样空间的方式研究了武夷山双遗产地景区系统分形特征的多尺度效应。
In addition, the influence factors to correlation dimension are discussed and the computing procedures of UDWT and progressive correlation dimension method are developed.
文中还讨论了关联维的影响因素,对UDWT和改进关联维方法编制了相应计算程序。
Correlation dimension is an important parameter to measure a nonlinear time sequence quantitatively, and it is widely used to analyze biomedical signal, such as EEG and ECG.
相关维数是定量描述非线性时间序列的一个重要参数,在脑电、心电等生物医学信号的特征描述方面得到了广泛地应用。
The parameters derived from the non liner test were index of Poincare graphics (PLO), complexity (com), prediction (pre), index of Lyapounov (li), and correlation dimension (CD).
非线性检测包括构成散点图、计算散点图量化指标(PLO)以及复杂度(COM)、预测度(PRE)、李雅普·诺夫指数(LI)、相关维(cd)等参数。
In order to reduce the influence of noise on the correlation dimension which is used in the hydraulic pump fractal fault diagnosis, a denoising method using adaptive wavelets was presented.
针对液压泵故障分形诊断方法中噪声对关联维数的影响,提出了自适应小波降噪的思路。
Methods Nonlinear dynamical behavior of both parabolic equation and elliptic equation were investigated by several tools such as Poincare section, Lyapunov exponent, and correlation dimension.
方法利用庞加莱截面、李雅普·诺夫指数、关联维等工具分别对抛物方程和椭圆方程的非线性动力学行为进行描述。
Correlation dimension of population pattern could reflect not only the scaling variation properties of spatial correlation of individuals, but also the spatial occupation degree of population.
种群格局关联维数是种群个体空间关联尺度变化规律的反映,表明了种群个体的空间相关程度。
The surrogate data technique is one of the effective methods to identify the chaos in the time series. In this paper, we introduce a kind of surrogate data method based on correlation dimension.
替代数据方法是判定时间序列中是否具有混沌特性的一种有效方法,本文介绍了该方法中一种基于关联维数的混沌判据。
Comparison with the correlation dimension of solar insolation curve, it shows that solar insolation change controls the basic pattern of climate changes, then superposes territorial characteristic.
与太阳辐射曲线关联维数对比表明,太阳辐射控制了气候变化的基本格局,在此基础上叠加了区域性特征。
This paper discusses chaotic characteristic of the power daily load of Sichuan Province based on saturation correlation dimension, and concludes that daily load time series belong to chaotic series.
基于饱和关联维数法,对四川省全省电力系统日负荷序列的混沌特征进行定量分析,得出日负荷时间序列具有混沌性的结论。
The value of correlation dimension can reflect sleep stages after analyzing and simulating the sleep EEG, and then simulation forecast for NREM sleep stage was made which accorded with actual result.
以长程睡眠脑电数据分析和仿真为例,分析结果表明关联维的高低能够反映出睡眠的阶段,据此对非快速眼动睡眠期的仿真预测与实际结果相符。
Add all of the tables used by the facts and dimension objects, along with their correlation names.
添加事实对象和维对象使用的所有表,以及它们的关联名。
Once the set of tables used by the dimension has been determined, it may be necessary to assign a unique correlation name to each table.
判断出这一维使用的表集之后,需要为每个表分配一个惟一的关联名。
If the dimension of pattern space is too big, it would result in the difficulty on calculation, and confusing with the indetermination because of high correlation of many variables.
如果模式空间的维数较大,那么不仅会造成计算上的困难,而且由于不少变量之间往往相关程度高,会造成混淆和不确定性,所以需进行特征选择。
If the dimension of pattern space is too big, it would result in the difficulty on calculation, and confusing with the indetermination because of high correlation of many variables.
如果模式空间的维数较大,那么不仅会造成计算上的困难,而且由于不少变量之间往往相关程度高,会造成混淆和不确定性,所以需进行特征选择。
应用推荐