Maximum Entropy Spectral Analysis of Time-Series Data from Combustion MHD Plasma
Maximum Entropy Spectral Analysis of Time-Series Data from Combustion MHD Plasma
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DOI：
10.1143/jjap.24.1204
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发表时间：
1985-09
影响因子：
1.5
通讯作者：
Tadashi Seidou;Y. Aoki;N. Ohtomo
中科院分区：
文献类型：
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作者：
Tadashi Seidou;Y. Aoki;N. Ohtomo
应用最大熵方法（MEM）对燃烧MHD等离子体总光辐射强度的时间序列数据进行了处理，得到了几kHz ~约10 kHz范围内具有多个特征峰的功率谱密度。30千赫。采用FPE、AIC和CAT的最小化来确定MEM频谱分析所需的最佳预测误差滤波器阶数。使用从互相关函数分析获得的等离子体流速为250 m/s，温度的频谱被转换为依赖于波数的功率谱密度，其中在对应于惯性子区的k范围内发现k-5/3依赖性。
The maximum entropy method (MEM) was applied to the time-series intensity data of the total light radiation from a combustion MHD plasma, and power spectral densities with many characteristic peaks were obtained in the range of a few kHz to ca. 30 kHz. Minimization of FPE, AIC, and CAT was employed to determine the optimum prediction-error filter order required for the MEM spectral analysis. Using the plasma flow velocity of 250 m/s obtained from cross-correlation function analysis, the frequency spectrum of the temperature was transformed to the wave-number-dependent power spectral density, in which a k-5/3-dependence was found in the k-range corresponding to the inertial subrange.