| 1. | Frequency - wavenumber energy spectra in isotropic turbulence
均匀各向同性湍流的频率波数能量谱 |
| 2. | Application of wavelet packet decomposition and its energy spectrum on the fault diagnosis of reciprocation machinery
小波包分解及其能量谱在发动机连杆轴承故障诊断中的应用 |
| 3. | Aiming at the common problems about the incline of biochip image , the automatic image rotation correction is realized by analyzing the power spectrum density of image projection
针对生物芯片扫描图象普遍存在的倾斜问题，利用图象投影的能量谱密度，实现对倾斜图象的自动校正。 |
| 4. | From the angles of the energy spectrum and distribution of feature frequency , ways of analysis on the tendency of signal in frequency domain are presented , and a method of solving frequency mixing is discussed
从能量谱和特征频率分布的角度，研究了监测信号的变化趋势在频域的表征，并提出了一种解决小波包混频现象的方法。 |
| 5. | 3 ) the features , which are respectively named wavelet multi - resolution energy feature and wavelet packet energy feature , are obtained by wavelet theory . and the simulation results show that the extracted features are effective
提取了小波多分辨能量特征和小波包能量谱特征，通过分类器的分类识别，结果表明提取的特征是有效的。 |
| 6. | By analyzing the result , three most main factors influencing the calculation accuracy are found : the constitution of wave scatter diagram , interpolating the irregular wave and the estimating of roll damping coefficient
通过分析计算结果提出了影响计算精度的三个最主要的因素：海浪能量谱的构成、不规则波的合成方法、横摇阻尼的估算。 |
| 7. | According to the relation between gear wear and its vibration , continuous wavelet transform is introduced to estimate the wear condition , the energy values of continuous wavelet on scale fit a spline which is much like that of the wear course of the gear
最后，将基于连续小波变换的信号处理方法引入变速箱齿轮的磨损估计。根据信号的连续小波变换的能量谱对尺度的积分值，拟合得到齿轮的磨损过程曲线。 |
| 8. | Results showed that the samples of different heat treatment technologies of 38crmoal can be comparatively preferable distinguished by real spectrum and phase spectrum of fft . further research on real and image spectrum of fft discovered that using energy spectrum of real and image of fft to discriminate these samples is more compact and convenient
研究发现用ut信号fft的实部谱图结合相位谱图能够相对较好的区分38crmoal钢的不同热处理状态：对ut信号fft的实部和虚部谱图的进一步研究表明，用ut信号fft的实部和虚部能量谱来区分热处理状态更为简捷和方便。 |
| 9. | Through processing of digital signals , the energy spectrum of bearing vibration has been obtained , and the gray incidence dynamic matrix being improved , and the energy spectrum of front and rear shafts being analysed by using the said matrix , and the prediction method of maximal peak value of the ball mill ' s coal pulverizing capacity being put forward
摘要通过数字信号处理获得轴承振动能量谱，对灰关联动态矩阵进行了改进并用其对前后轴能量谱进行分析，提出了磨煤机制粉出力的最大峰值的预测方法。 |
| 10. | All records are classified into three site conditions . for the two components of a record , two energy equivalent spectra are calculated , and the geometric mean of the two spectra are adopted to analysis by two - stage regression method using an attenuation model . then the attenuation law is attained
对每一条记录，取了两个分量所计算的能量谱的几何平均值，选择了衰减模型，利用两步回归法，对这些能量等效速度谱做了统计拟合分析，得出了地震动四种能量反应谱随震级、距离等参数的衰减规律。 |
