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The vibration signals from a free vibrated cantilever beam are carried on Fast Fourier Transformation and spectrum analysis.

采集悬臂梁自由振动下的声发射信号，并对信号进行快速傅里叶变换和频谱分析。

It is book and only book can provide you with the vast space and the endless time, pass onto you the scattered signals from all the noble lives, present in front of you the countless wisdom and rosiness in comparison with fatuity and ugliness.

只有书籍，能把辽阔的空间和漫长的时间浇灌给你，能把一切高贵生命早已飘散的信号传递给你，能把无数的智慧和美好对比着愚昧和丑陋一起呈现给你。

At the same time, the simplified calculation method, all round dead state configuration, universal over-modulation principle and fast output block technology of fault PWM signals have been put forward.

提出了简化的开关时间计算方法、完善的死区设置、通用的超调制原则以及故障信号高速闭锁的实现方法。

In the end computer simulation results show that the proposed approach can feasibly and effectively sort the radar emitter signals.

最后，通过计算机仿真验证了该方法的可行性和有效性。

Coaxial cable, optical fiber, and even free space can carry network signals.

同轴电缆、光纤，甚至自由空间都能传递网络信号。

The distributed optical fiber sensing gas system uses space division multiplexing technology and many gas absorption optical fiber sensors to deal with the gas signals by the harmonic detecting technology.

分布式光纤传感瓦斯气体系统是利用空分复用技术，采用多个气体吸收型光纤传感器，并通过谐波检测技术对瓦斯信号进行处理。

Competition among four-wave mixing with two dressing fields, the six-wave mixing with one dressing field as well as the eight-wave mixing propagating along the same direction can be evoked by adjusting laser beams because these multi-wave mixing signals are induced by atomic coherence between common levels.

研究发现，通过调节激光束方向，沿同一方向出射的八波混频、双缀饰四波混频和单缀饰六波混频信号因共用能级的原子相干产生而出现竞争现象，通过控制缀饰场减弱四波混频和六波混频信号强度，可以达到增强八波混频信号的目的。

Field test data also show that the new algorithm can remarkably improve the ability to acquire more satellite signals.

实际接收的数据也表明，算法能明显增加捕获到的卫星数量。

Permanent magnet synchronous motors have been widely used as AC drives over the last two decades due to their high efficiency, high power density and no dc field winding in the rotor. It is well known motion control of PMSM requires accurate position and velocity signals to realize field orientation.

永磁同步电动机由于无需励磁电流、运行效率和功率密度都很高，在过去的二十年里已被广泛地应用在交流调速传动中，但它的高性能控制需要精确的转子位置和速度信号去实现磁场定向。

In the past 20 years, the way to photoelectric sensor (CCD and CMOS in the record after the light into the strength of electromagnetic signals, and then back to the late optical images) of digital photography with the rapid development of computer technology, great share in the replacement or partial replacement of the traditional forms of film recorder.

在近20年的时间里，以光电传感的方式(在CCD和CMOS上记录光线转化后的电磁信号的强弱，后期再还原为光学影像)的数码摄影随着计算机技术的高速发展，在极大的份额中取代或部分取代了传统的胶片记录形式。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。