| 1. | Signal change interval
号志转换时段 |
| 2. | Relationship between surface electromyographic signal changes and subjective assessment of muscle fatigue during isometric contractions
变化与主观疲劳感之间的关系 |
| 3. | Application of wavelet transform and wavelet entropy in the characteristic study of sleep electroencephalogram signal change
小波变换和小波熵在睡眠脑电信号变化特性研究中的应用价值 |
| 4. | The information disseminated through these media includes storm movement , possibility of signal changes and precautionary actions
经这些媒介发放的信息包括热带气旋的动向，改变信号的可能性和应采取的防风措施等。 |
| 5. | The information disseminated through these media includes storm movement , possibility of signal changes and precautionary actions
经这些媒介发放的信息包括热带气旋的动向，改变信号的可能性和应采取的防风措施等。 |
| 6. | We do not have statistics on cases where pedestrians were knocked down by vehicles due to failure to cross the road before the traffic light signals changed
我们没有就因未能在交通灯号转变前及时横过马路而遭车辆撞倒的个案数字作出正式的统计。 |
| 7. | It has been reported that on september 3 this year , an 81 years old man was knocked down and killed by a vehicle on prince edward road west because he failed to cross the road before the traffic light signal changed
据报，本年九月三日，一名八十一岁老翁在旺角太子道西因未能在交通灯号转变前及时横过马路而遭车辆撞死。 |
| 8. | ( 2 ) damage detection based on wavelet transformation using the principle of time - frequency analysis based on orthonormal discrete wavelet transformation , it can detect damage by analyzing how the frequency content of observation signal changes with time
该方法利用基于离散正交小波变换的信号时频分析原理，通过分析观测信号的频谱随着时间的变化情况来检测破损。 |
| 9. | In this thesis a high precision frequency ( range ) estimation technique based on the phase of the fft of the beat - note signal is presented . the phase of the fft of the beat - note signal changes with the range between the radar and the liquid surface
差拍信号的fft幅度最大处的相位随距离变化，因此可以利用fft相位在一个频率(距离)分辨单元范围内估计差拍信号的频率(距离)的位置，从而提高频率(距离)估计精度。 |
| 10. | The other research purpose is to discover characteristic information and reliable methods of reflecting spinal cord damage . due to typical damage indicators , amplitude and latent period , have bugs such as limited information and weak stabilities , this project recommends applying time - frequency analysis to monitoring spinal cord function . through analysing and comparing typical signal with stft and cwt , it is proved indicators under time - frequency distribution can be better in reflecting signal changes , espcially the wavelet transformation
针对目前ep监测中判定脊髓损伤的指标（波幅和潜伏期）存在信息量相对较小、稳定性较差的缺陷，本课题提出利用时频分析技术对术中脊髓功能监护进行研究，通过短时傅立叶变换和小波变换分析和比较典型信号的时频分布，证明时频特征参数能更有效的提取信号的变化信息。 |
