| 1. | Amplitude correction approach using average of several points in discrete spectrum for analyzing the dynamic signal of rotating machinery with varying speed
变速机械弱时变信号幅值谱校正的多点平均法 |
| 2. | Based on wavelet packet decomposition （ wpd ） , entropy threshold method （ etm ） has been put forward to reject the discrete spectrum interference （ dsi ） in on - line pd monitoring
首次提出用于抑制局部放电在线监测中周期性窄带干扰的小波包变换熵阈值法（ etm ） 。 |
| 3. | In order to avoid spectrum error due to energy leakage , the thesis research on identification of parameters of two close frequency components in discrete spectrum analysis , and simulation result shows the validity of the method
针对由于能量泄漏造成的频谱误差，深入研究了密集频谱的频域参数识别法，从理论上加以推导，并通过仿真证明了该方法的有效性，可以识别1个频率分辨率以内的两临近频率分量。 |
| 4. | Adopting the latest research result on dynamic signal discrete spectrum analysis and the idea of virtual instrument , a dynamic signal analysis virtual instrument software system is developed , which is based on windows and has good performance
并采用动态信号离散频谱分析领域最新研究成果，基于虚拟仪器设计思想，研制一套方法新、功能全、实时性好、精度高的基于windows的通用动态信号分析虚拟仪器软件系统。 |
| 5. | The method of compressing bandwidth of fringe function is proposed that basis fringe contains discrete spectrum which is based on human vision for real - time display , we also introduce discusses the spatial light modulators ( slms ) based on display system of digital holography and theory of numerical reconstruction of digital holography
为了达到实时性要求，在满足人眼视觉的光信息量基础上，对带宽压缩的理论问题进行了研究，提出了基于离散频谱的带宽压缩算法，并给出了结果。 |
| 6. | ( 5 ) method of bandwidth compression of holographic grating based on discrete spectrum and realization of a 1 / 8 bandwidth compression of holographic grating ( 6 ) holographic stereogram display that can be implemented using cgh and imaging process through capturing sequence parallax images based on result of computed basis fringe
采用空间频率域的子采样，计算了一个8倍的条纹函数压缩编码结果，并给出了简单易行的解码方式。 6 、利用获得的基本条纹函数合成了一个基于序列视差图像的立体图显示，实现了三维数据未知的物体的三维全息显示。 |
| 7. | After analysising three existed methods for phase difference correction on discrete spectrum , it is recommended to correct the spectrum containing small noise in engineer practice by the first phase difference correcting method ( performing fft analysis on two continuous original sequence ) with harming window
综合分析现有三种离散频谱相位差校正方法，推荐在小噪声工程实际中加hanning窗的第一种相位差法(采连续两段信号作相同点数fft的相位差校正法)进行校正。 |
| 8. | Study shows that the basic principles of three existed methods for phase difference correction on discrete spectrum are identical , by which the twice fft analysis through time - domain shifting time series or changing window ' s length is performed , and the spectrum by making use of the phase difference of two corresponding peak lines are finally corrected
在研究时域平移的离散频谱相位差校正方法和改变窗长离散频谱相位差校正方法的基础上，发现这几种离散频谱相位差校正法的基本原理是一致的，就是通过时移和加不同的对称窗进行两次fft分析，并利用离散频谱对应峰值谱线的相位差以求得频率和相位校正量。 |
