- 更多网络例句与周期图相关的网络例句 [注：此内容来源于网络，仅供参考]
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According to the results of comparison between these methods of spectrum evaluation, a new method of power spectrum evaluation of welding arc sound is advanced by means of association of wavelet packet analysis with the Welch average method .
对试验系统采集到的焊接电弧声进行了小波包多层分解，并利用周期图法、Welch 平均法及AR模型法，对各频段信号进行功率谱估计。根据不同谱估计方法的对比结果，提出小波包分解结合Welch 平均法对焊接电弧声进行功率谱估计的新方法。通过对几种规范与飞溅率下的电弧声功率谱的初步分析，发现其功率谱分布具有一定的规律性，并且不同频段谱峰值及其对应频率与焊接飞溅具有相关
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After a power spectrum is constructed, empirical wavelet coefficients are used to detect the jump points in the function to obtain the strong consistent estimator of the position and number of the frequencies. Numerical simulations show this method is reliable.
根据它们的协方差函数可以表示为一个Fourier级数，而其Fourier系数可通过协方差函数的逆变换得到的特性，我们对于零均值的近周期相关序列构造了类似于周期图的函数，并构造其经验小波系数，利用频率处于此函数的尖点的特性，以及此性质在经验小波系数中的反映，来确定频率的个数和位置，所有的估计量都是强相合的，此外，数值模拟的结果表明，我们的方法是有效的。
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The improvement in performance are manifested by their high accuracy in picking up the peak value and higher resolution.
改进的周期图法和小波变换方法对推动自发耳声发射在临床生理和病理上的应用有巨大的潜力。
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Variation of relief and its reoccurrence were analyzed with 1∶10 000 DEM by harmonics analysis method and periodogram.
结果表明，利用谐波分析和周期图分析均可得到侵蚀沟的分布周期。
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A model for finding the cryptic period of hydrological time series is proposed. The functions of the model include to apply logarithm transformation for making the sequence more stationary, to construct a corresponding auto-regression model for reducing the herteroskedasticity of residual, to determine the component of the prime period by periodogram analysis.
本文在讨论水文时序平稳性和异方差性的基础上，提出了检测水文时序隐含周期的模型，即对水文时序设计对数变换序列，提高序列的平稳性；建立相应的自回归模型降低残差的异方差性；通过对所得平稳序列进行周期图分析确定可能的主周期分量。
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Model for finding the cryptic period of hydrological time series is proposed. The functions of the model include to apply logarithm transformation for making the sequence more stationary, to construct a corresponding auto-regression model for reducing the herteroskedasticity of residual, to determine the component of the prime period by periodogram analysis.
bstract 本文在讨论水文时序平稳性和异方差性的基础上，提出了检测水文时序隐含周期的模型，即对水文时序设计对数变换序列，提高序列的平稳性；建立相应的自回归模型降低残差的异方差性；通过对所得平稳序列进行周期图分析确定可能的主周期分量。
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Results show that dominant periods of relief variation can be derived by periodogram more obviously and easily than by harmonics analysis,while harmonics analysis can obtain relief variation simulation models as well as its periods.
相比较而言，周期图分析可以更加直观地得到满足显著性检验的分布周期，但谐波分析还可以根据周期检验结果，得到对应的谐波模型。
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A novel algorithm for InSAR SLC coregistration is proposed. The averaged periodogram is used as evaluation function of registration in the new algorithm and the estimation variance of evaluation function is reduced by separating the data into numbers of subsections and averaging them, thus the accuracy and reliability of registration is improved.
提出了一种新的干涉合成孔径雷达复图像配准算法，新算法使用干涉相位图的平均周期图作为配准的评价测度函数，采用数据分段求平均的方法降低了评价函数的估计方差，从而提高了配准的精度与可靠性。
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The bias of cyclic periodogram with ssinc window is analyzed in both spectrum frequency direction and cycle frequency direction, and that the TA cyclic spectrum estimation is unbiased is analyzed. The average method of cyclic periodogram is also derived in terms of STFT.
论文中通过分析加ssinc窗的循环周期图在谱频率方向和循环频率方向的偏差，表明TA循环谱估计是无偏估计，并根据STFT方法，推导了使方差得以减小的平均循环周期图方法。
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Due to existing signal processing technology's shortage such aslow measurement, narrow measurement range precision and other poor performance, we introduced a high-precise signal processing technology:firstly,to get power spectrum with Hanning windowed Welch modified periodogram, search its peak value frequency;secondly, to apply zooming analysis via Goertzel algorithm;at last,to get a highly precise doppler frequency with energy centrobaric rectifying algorithm.
针对存在的缺点，本文提出了一种应用于激光多普勒测速的高精度信号处理技术，即首先利用加Hanning窗的Welch修正周期图算法得到信号功率谱，搜索其谱峰值频率，接着利用Goertzel频谱细化算法对搜索的谱峰进行细化分析，再引入能量重心频谱校正算法对细化后的谱峰进行校正分析，从而将离散频谱分析算法、频谱细化算法和频谱校正算法三者有机结合起来，充分发挥各自的优点：通过加Hanning窗的Welch修正周期图算法快速得到功率谱及峰值频率，通过Goertzel算法获得分析频带的高分辨率频谱，然后通过能量重心校正算法对细化后的频谱进行高精度校正，这样不仅保证了算法的高效性，而且大大提高了分析的精度。
- 更多网络解释与周期图相关的网络解释 [注：此内容来源于网络，仅供参考]
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periodogram analysis：周期图分析
periodogram 周期图 | periodogram analysis 周期图分析 | periodograph 周期图
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The history of periodogram analysis is：周期图
periodicity 周期数 | periodogram 周期图, The history of periodogram analysis is | peripheral blade 外圆型刀片
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periodogram：周期图
19世纪末,Schuster提出用傅立叶级数的幅度平方作为函数中功率的度量,并将其命名为"周期图"(periodogram). 这是经典谱估计的最早提法,这种提法至今仍然被沿用,只不过现在是用快速傅立叶变换(FFT)来计算离散傅立叶变换(DFT),
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smoothed periodogram：平滑周期图
542 smoking prevalence 吸烟流行率 | 543 smoothed periodogram 平滑周期图 | 544 social workers 社会工作者
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Whittaker periodogram：周期图
白(杂)讯 white noise | Whittaker周期图 Whittaker periodogram | 趸售物价指数;批发物价指数 wholesale price index
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Alter periodogram：奥尔塔周期图
alter mode 变更方式 | Alter periodogram 奥尔塔周期图 | alter polarity 变更极性,交替极性
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normalized cumulative periodogram：正规化累积周期图
计分标准化;计分常态化 normalization of scores | 正规化累积周期图 normalized cumulative periodogram | 正规化设计 normalized design
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periodograph：周期图
periodogram analysis 周期图分析 | periodograph 周期图 | periodparallelogram 周期平行四边形
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periodograph：周期图仪
periodogram /周期图/ | periodograph /周期图仪/ | periodometer /调和分析仪/
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cyclogram：排卵周期图 周期图
cyclogenyofbacteria细菌生活史 | cyclogram排卵周期图 周期图 | cycloguanilembonate环氯胍恩波酸盐