supported by the National Basic Research Program of China (Grant No. 2013CB228602);the National Science and Technology Major Project of China (Grant No. 2016ZX05004003-002);the National High Technology Research and Development Program of China (Grant No. 2013AA064202)
For land seismic surveys, the surface waves are the dominant noises that mask the effective signals on seismograms.The conventional methods isolate surface waves from the effective signals by the differences in freque...
partially supported by the National Key Basic Research Program of China(No.2013CB329202);the National Scientific Equipment Development SpecialFoundation of China(No.2011YQ03013401);the National Natural Science Foundation of China(No.61475021);the Beijing Natural Science Foundation(No.4152015)
Diffractive optics is an important technique for beam shaping with high light efficiency and strong diffraction pattern flexibility. Since the diffraction angle is limited by the unit size of the diffractive optical e...
supported by the National Basic Research Program of China(No.2013CB228602);the National Science and Technology Major Project of China(No.2011ZX05004-003);the National High Tech Research Program of China(No.2013AA064202)
First-break picking is the key step in seismic data processing for surveying undulate surfaces, and directly infl uences the precision of near-surface modeling and effects of static corrections. The current first-brea...
Project(51174191)supported by the National Natural Science Foundation of China;Project(2013CB227904)supported by the National Basic Research Program of China;Project(2012QNB09)supported by Fundamental Research Funds for the Central Universities,China
The high resolution Terra SAR-X dataset was employed with DIn SAR and persistent scatterer interferometry(PSI) technique for subsidence monitoring in a mountainous area. For DInS AR technique, the generally used SRT...
supported by the National Natural Science Foundation of China(Grants Nos. 10972113,10732080);the National Basic Research Program of China(Grant Nos. 2007CB936803,2010CB631005);SRFDP(Grant No. 20070003053)
A temporal approach to fast shape measurement is presented.In principle,the rotational object method is used in combination with the sequence pulse counting method (SPCM) to determine the height of the object through ...
National Basic Research Program of China(973 Program,No. 2003CB716207);National Natural Science Foundation of China(No.50775091)
A method for measurement of ultra-low flying height in head-disk spacing is described. Three different wavelengths are selected out from white light by filters to measure the spacing simultaneously. Besides solving th...
Phenomena of electron, neutron, atomic and molecular diffraction have been studied in many experiments, and these experiments are explained by many theoretical works. We study neutron single-slit diffraction with a qu...
Supported by the Major State Basic Research Development Program of China (Grant No. G1998040703) ; the Chinese Academy of Sciences (KZCX2-309); The ERS-1/2 SAR data was provided by ESA for the ERS project (ERS A03-374).
SAR interferometry (InSAR) has a high potential for surface displacement mapping in the range from millimeter to meter. In this paper the potential of ERS-1/2 SAR interferometry for mapping subtle land subsidence has ...
Supported by the Ministry of Science and Technology of China under Grant No.95-Yu-34;the National Natural Science Foundation of China under Grant No.19835040.
A fast melting release method for the free-fall equivalence principle test using laser interferometry is discussed.The primary experiment result shows that the uncertainty of the differential release time could be con...
Supported by the Ministry of Science and Technology of China under Grant No.95-Yu-34;the National Natural Science Foundation of China under Grant No.19835040。
A simple interferometer was used to monitor the seismic noise effect on the equivalence principle test using the free-fall interferometric method.The experimental result showed that this effect was belowλ/100,whereλ...