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Based on Wavelet Packet Analysis and Smoothed Pseudo Wigner-Ville Distribution, the experiment data is time-frequency analyzed.

结果表明：该等离子体声波强度随激光能量的增大而增大；频率范围在0-150KHz，在频率为25KHz附近有一峰值；且频率范围和峰值位置基本不随作用激光能量以及靶材料的改变而改变。

They applied smoothed pseudo Wigner–Ville distribution [1,2], order tracking and time domain averaging techniques to distinguish faults in the gears.

他们应用平滑伪Wigner - Ville分布 [ 1，2 ] ，订单跟踪和时域平均技术，以区分故障的齿轮。

Compared with Smoothed Pseudo Wigner-Ville Distribution,this algorithm can reduce the cost of computation,save operation time under the situation that keep approximate performance and is suitable for real-time analyzing.

与平滑伪维格纳分布相比，在保持相似性能的情况下，该算法运算量比较小，可以有效地节约运算时间，适合于快速跳频信号的实时分析。

Time-Frequency analysis method is applied to the analysis of PEC signals with the aim of discriminating the occurrence of corrosion from the simultaneous variations of lift-off, smoothed pseudo Wigner-Ville distribution is used to get the signal spectrum map. The method of extracting the lowest energy area as the classification eigenvalue is proposed, and a good classification result is acquired.

采用时频分析的方法对同时出现腐蚀缺陷和提离变化的情况进行了识别，利用平滑的伪Wigner-Ville分布得到了信号的谱图，提出了提取谱图中最低能量区域面积作为特征量进行识别的方法，取得了较好的识别效果。

Based on Wavelet Packet Analysis and Smoothed Pseudo Wigner-Ville Distribution, the experiment data is time-frequency analyzed. The experimental results indicate that the amplitude of the laser-induced acoustic waves increases with the laser energy; the frequency coverage is from 0 to 150 KHz, and in the meantime there is a peak located at about 25 KHz. In addition, the spectrum and the peak of frequency are basically stable in spite of the change of laser energy and target texture.

从基本的空泡动力学理论出发，推导了空泡各特征参量之间的关系，进而对空泡动力学模型进行了修正；采用有限差分法对空泡脉动进行数值模拟，得到了空泡脉动特性随液体粘性、空泡含气量、表面张力以及可压缩性的变化规律；实验上采用光偏转测试装置探测了激光空泡脉动以及空泡溃灭的细节过程，进而分析了液体粘性和作用激光能量对空泡脉动周期、泡半径及泡能等特征参数的影响。

First the unknown signals were separated by joint approximate diagonalisation of eigen-matrices algorithm. Then the method used the smoothed pseudo Wigner-Ville distribution of each separated FH signal to estimate its transmission parameters such as hop duration, time-offset and hopping frequency pattern.

首先采用特征矩阵联合近似最优化算法分离跳频信号，再利用多窗口重叠的平滑伪Wigner-Ville分布来估计出跳频信号的跳周期、定时偏差和跳频频率等参数。

The minimum smoothed monthly mean sunspot numbers is 7.1±2.6. Compared with other predictions, the onset time of cycle 24 in this paper is close to that of Ref.

与其他研究者的预报结果相比较，本文给出的结果与文献[11]和[12]及MSFC的结果比较一致。

As Bees In spring time, when the Sun with Taurus rides, Pour forth thir populous youth about the Hive [ 770 ] In clusters; they among fresh dews and flowers Flie to and fro, or on the smoothed Plank, The suburb of thir Straw-built Cittadel, New rub'd with Baum, expatiate and confer Thir State affairs.

V1：那时长着翅膀的天使们，在元首的命令下，用威严的仪式和号筒的声响，向全体官兵传达消息，宣布在元首撒旦和大天使们的最高首府&万魔殿&开一个严肃的会议，开会者是各队各团中有地位的，或是选拔出来的最优秀者。

The control signals of the PWM rectifier are obtained by comparing the current of AC side with triangular wave (or saw-tooth wave) directly, which can implement the steadiness of the voltage of DC side and unit capacity factor of the system. At the same time, harmonic component of the system is abstracted through Instant Reactive Power Method, which can be smoothed by Integrated Learning Boost Converter Control.

本文采用重复学习Boost变换技术，利用滑模变结构控制技术对单相PWM整流器恒频Boost变换进行了分析，提出将交流侧电流直接与三角波相比较得到开关控制信号的方法，实现直流电压恒定不变及系统单位功率因数；同时，利用瞬时无功功率法分析系统谐波，并在谐波域内使用重复学习的控制方法，结合Boost变换技术，有效滤除系统谐波有功电流。

Rita smoothed suntan lotion onto her shoulders as she watched her niece sitting cross-legged in the sand, 1poking a shell fragment with someone ' s discarded straw.

丽塔一边往肩上抹着防晒油，一边看着她的外甥女。小姑娘盘腿坐在沙滩上，正用别人扔掉的吸管拨弄着一个贝壳残片。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了