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频率扫描
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  frequency scan
    Two novel depth-domain frequency spectrum analysis methods for logging data have been developed, which are depth-domain frequency scan and moving-window frequency spectrum analysis.
    本文在前人研究的基础上提出了两种基于测井资料的深度域频谱分析方法──深度域频率扫描和滑动窗频谱分析。
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  frequency scan
The high resolution spectra are measured tuning the length of a CO2 waveguide laser by means of a PZT yielding a frequency scan of 230 MHz around the CO2 laser lines.
      
Our frequency scan data, as well as our data for the time course of resistance and capacitance, show that the fast change is associated with both the under-the-cells and between-the-cells resistance.
      
The high sensitivity of the intracavity arrangement allowed very strong double-resonance and two-photon transition signals to be observed with high microwave-frequency scan-rates (1 GHz/min), and low microwave pumping powers (≦10mW/cm2).
      
In this way an idler frequency scan of 100-150?GHz could be obtained, after which the signal frequency hops ahead over the FSR of the intracavity etalon of the OPO (207?GHz).
      
Low noise, mode-by-mode absorption spectra are recorded at a high acquisition rate (laser frequency scan greater than 400?GHz/s) and covering four orders of magnitude in absorption coefficient.
      
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  frequency scanning
In the second case, the Brewster reflection conditions are not realized, and the variations in the intensity of the reflected light observed upon frequency scanning are smaller.
      
A diplexer of this type can be used for discrete frequency scanning of high-power wave beams in systems for the suppression of the hydrodynamic instabilities of plasma in magnetic traps.
      
Amorphous carbon films were examined by low frequency scanning-probe acoustic microscopy (LF-SPAM).
      
Our results showed that the low frequency scanning-probe acoustic microscopy is a useful method for imaging subsurface defects with high resolution.
      
Frequency scanning of the laser is provided by acoustooptic modulation.
      
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Depth-domain frequency spectrum analysis method for logging data means to analyse, on the basis of Fourier transform, not only the frequency spectrum character of logging data but also the relation between it and high frequency sequence so as to ascertain high frequency sequence. Two novel depth-domain frequency spectrum analysis methods for logging data have been developed, which are depth-domain frequency scan and moving-window frequency spectrum analysis. These methods have achieved good effect in sequence...

Depth-domain frequency spectrum analysis method for logging data means to analyse, on the basis of Fourier transform, not only the frequency spectrum character of logging data but also the relation between it and high frequency sequence so as to ascertain high frequency sequence. Two novel depth-domain frequency spectrum analysis methods for logging data have been developed, which are depth-domain frequency scan and moving-window frequency spectrum analysis. These methods have achieved good effect in sequence stratigraphy research in Anan depression.

测井资料的深度域频谱分析方法是指在傅里叶交换基础上研究测井资料的频谱信息特征及其与高频层序的关系,以用于层序地层学研究中的高频层序划分。本文在前人研究的基础上提出了两种基于测井资料的深度域频谱分析方法──深度域频率扫描和滑动窗频谱分析。该项技术已在阿南凹陷层序地层学研究中取得了良好的效果。

The history ofSeism icArray wasstarting in theendof50′s,which targetswerem ain- ly to detectsignals thatare created by nuclearexplosion and to distinguish signals ofnu- clearexplosion from signalsofearthquakeatthatm oment.TheseismologistsofChina also tentatively studied Array in 70′s.In theprocessofdeveloping array,m any new techniques havebeen introduced into disposalofsignaland analysisofarray′sdata.In thispaper,the application offrequency beam form scan and apparentvelocity beam form scan in analyzing...

The history ofSeism icArray wasstarting in theendof50′s,which targetswerem ain- ly to detectsignals thatare created by nuclearexplosion and to distinguish signals ofnu- clearexplosion from signalsofearthquakeatthatm oment.TheseismologistsofChina also tentatively studied Array in 70′s.In theprocessofdeveloping array,m any new techniques havebeen introduced into disposalofsignaland analysisofarray′sdata.In thispaper,the application offrequency beam form scan and apparentvelocity beam form scan in analyzing array′sdata wasintroduced and wasspecially studied, and thesem ethodswere concretely applied in selecting site ofShanghaiSeism icArray.

地震台阵的历史起始于50 年代末, 当时其目标主要是检测核爆炸产生的地振动信号与鉴别核爆炸信号和地震信号。我国地震学家在70 年代也曾对台阵作过初步研究。在台阵的发展过程中, 许多新技术被引进用于信号处理, 数据分析和解释。本文主要介绍频率扫描聚束及视速度扫描聚束在台阵数据处理中的应用, 并使用该技术在上海地震台阵选址中的具体实现。

This paper mainly discusses the precise positioning method for the urban seismic mobile moving fault, and the study results shows: the frequency sweeping method and the mutual correlation method of data processing can effectively suppress the disturbances from strong vibrations with the vibroseis in the strong-disturbance background in the city so as to carry out the seismic investigations in the urban area; for the sliding faults in which there is no clear fault displacements between the two beds, the high-resolution...

This paper mainly discusses the precise positioning method for the urban seismic mobile moving fault, and the study results shows: the frequency sweeping method and the mutual correlation method of data processing can effectively suppress the disturbances from strong vibrations with the vibroseis in the strong-disturbance background in the city so as to carry out the seismic investigations in the urban area; for the sliding faults in which there is no clear fault displacements between the two beds, the high-resolution seismic prospecting method and electrical prospecting method can be used to position the fault precisely; finally, a case is used to demonstrate the precision positioning method based on the electrical prospecting.

重点讨论了城市地震活动断层精确定位方法.研究结果表明:面对城市的强干扰背景,利用可控震源,采取频率扫描方法和数据处理的互相关技术,可以有效压制强振动干扰,实现城市市区的地震勘探;对于两盘无明显断距的走滑断层可以利用高分辨率地震勘探方法和电法勘探方法进行联合精确的定位;并结合实例讨论了电法勘探的精确定位方法.

 
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