The results showed that the main frequency of the earthquake wave produced by the source is higher obviously than ordinary seismic explosive columns.
结果表明，该震源激发地震波的主频率比普通震源的有明显提高。
High quality millimeter wave frequency source is the important component in the development of millimeter wave systems and application.
优质的毫米波频率源是毫米波系统与应用的关键部件，它的性能很大程度上决定了系统的性能。
Geometrical optics approach can only calculate the high frequency approach solution of drilling bit vibration source wave equation in non caustic area but it become invalid in caustic area.
由于几何光学法求解钻头震源波动方程的高频近似解有局限性，即在焦散区失效，故只能计算非焦散区的高频近似解。
The frequency modulation effects of positive dipole (unipole) forcing source on LFO is stronger than negative dipole (unipole), and the wave oscillation quicken evidently.
正偶(单)极强迫源对大气低频振荡的调制作用强于负偶(单)极，波动振荡明显加快。
The square wave source is an impulse source in which digital technique is used. It has the advantages of rigid phase, high frequency stabilization and high antijamming.
方波电源是采用数字技术的脉冲电源，具有相位严格、频率稳定度高，抗干扰能力强等独特的优点。
The design method of normal frequency standard signal source, which utilizes program control digital wave synthesis technology and achieved by microcontroller was given.
采用程控数字波形合成技术，通过单片微型计算机系统实现了工频标准信号源。
The characteristic frequency of body-wave spectra carries the information of the duration of source body-wave pulse.
体波波谱特征频率携带着震源体波脉冲持续时间的信息。
It is shown that cycle of sedimentary wave is response to each order sequence and the character of high frequency wave is correlated with oil source, reservoir and cap rock.
通过分析沉积波动周期与各级层序持续时间的对应关系，找出了高频沉积波动特征与生储盖之间的对应关系。
The effects of the sea sediment parameters and center frequency of the source on the low frequency acoustic wave propagation in shallow water are investigated.
考察了海底沉积物参数、声源激发主频等对低频声传播的影响。
From chapter three to chapter five, the three key components of the system: millimeter-wave phase locked sources, multiple frequency local source, low noise amplifier are designed and tested.
第三章至第五章分别介绍了毫米波锁相源、二倍频本振源和低噪声放大器三个系统关键的单元电路的设计过程和测试结果。
A square-wave AC high-frequency welding power source is composed of the square-wave AC high-frequency generator and DC welding machine controlled by thyristor.
将晶闸管直流焊机与方波交流高频发生装置组合，构成方波交流高频焊接电源。
A square-wave AC high-frequency welding power source is composed of the square-wave AC high-frequency generator and DC welding machine controlled by thyristor.
将晶闸管直流焊机与方波交流高频发生装置组合，构成方波交流高频焊接电源。
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