This paper introduced a local cosine-basis based dictionary, it segments the time frame and ADAPTS speech signal's changes of the time-frequency structure.
构造局部余弦基字典，其对时间轴的分割适应于语音信号时频结构的变化，而且有较高的时频分辨率。
Time frequency analysis techniques are used to quantify cracks appearing in aircraft structure.
采用时频分析的方法实现了对飞机结构中出现的裂纹的定量检测。
UWB communication not only requires antennas be of good property in the domain of frequency and time, but also requires small size, simple structure, light weight and low cost antennas.
UWB通信不仅要求天线具有良好的时域与频域特性而且要求天线尺寸小、结构简单、重量轻、成本低等。
In order to solve these problems, we proposed a single feature vector recognition model based on whole time-frequency information structure of digit speech.
为了解决这些问题，我们提出了基于数字语音时频信息整体结构的单特征向量识别模型。
By exploiting wavelet packet transform to analyze signals both in time and frequency space, this paper researches the statistic property of non-Gaussian stationary noise and its signal structure.
该文利用小波包变换的时频局部分析能力，研究了非高斯分布平稳随机噪声的统计特性，揭示了非高斯噪声信号的信号结构。
RCFD has similar performance as GFD, while it costs less in realization, because it realize the time match filter and frequency match filter in one structure.
该结构中的FD采用了RCFD，它与传统的GFD相比有着类似的性能，而且通过在时域匹配滤波器的结构上衍生出频域匹配滤波器结构，大大节省了实现开销；
A modified direct digital frequency synthesis (DDS), pipelined structure, and time-sharing ROM are adopted in the chip, for saving chip area and ensuring high performance and speed.
该芯片采用了改进的直接数字频率合成算法、流水线结构与ROM分时复用技术，保证了芯片的高性能和速度，节省了芯片面积。
This paper introduces structure and component of the high frequency pulsed power supply on AT89C2051. At the same time, it describes the method of debugging of the high frequency pulsed power supply.
介绍了基于AT89C2051的高频脉冲电源的结构和组成部分以及脉冲电源的调试过程。
So the influence of high-frequency noise is analyzed by the analysis of power spectra, coherent structure, probability distribution of time series and differences of them.
针对这些现象，从谱、相干结构、时间序列本身的概率分布和标量差的概率分布，分析了高频噪声的影响。
The results provide precise measurements of the dynamics characteristics of the space deployable structure in the time-frequency domain, which are helpful for improving the system analysis and design.
实现了对航天可展结构动力学性能在时频域内的“精细”考察，将有助于提高航天器结构的分析与设计水平。
However, when one may optimize structure with a specially designated frequency, the ones lower than the frequency should be avoided to save time and to improve computing precision.
对于指定频率的动力拓扑优化问题，如果能够避免求解指定频率以前的频率而直接对指定频率进行计算，将无疑可以提高计算效率和计算精度。
Duble frequency conversion struchre, simplfied structure. easy to maintain, less wear and "long time".
双变频简约机械结构，易维护，磨损少，寿命长。
The transmission rule of the lamb wave in the structure of the flexible joint is discussed, and the ultrasonic pulse echo is analyzed in the time-field and frequency-field.
本文首先分析了板波诱发纵波在柔性接头构件中的传播规律，对原始回波信号进行时域和频域分析。
The uncertainty of the controlled object modeling was analyzed. As for the time delay and high frequency no modeling considered in design, the uncertainty modeling of non structure was found.
对被控对象模型中的不确定性进行了，针对设计中主要考虑的输入延时和高频未建模动态，建立了非结构化乘性不确定性模型。
A method for identifying the instantaneous frequency of a linear time-varying structure was proposed.
提出了一种识别线性时变结构瞬时频率的方法。
A method for identifying the instantaneous frequency of a linear time-varying structure was proposed.
提出了一种识别线性时变结构瞬时频率的方法。
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