The experiment results reveal unique vibration characteristics of different events in the frequency domain and confirm the effectiveness of the homemade Φ-OTDR system in the application of the distributed fence-perimeter intrusion detection. Keywords: Phase-Sensitive Optical Time Domain Reflectometer, ...
Physical processes often evolve periodically over time, making frequency-domain analysis a powerful engineering tool for characterizing and designing a system’s behavior. This chapter introduces the basic concepts of the time domain, the frequency domain, and transformations between the two in the conte...
UWB antennaL shaped slotBand notchedFrequency domainTime domainIn this paper, the design, simulation and fabrication of a CPW fed monopole UWB antenna with band-notched function suitable for UWB application are presented and investigated. The band–notched charact...
Simultaneous time-domain and frequency-domain meta 专利名称：Simultaneous time-domain and frequency- domain metal detector 发明人：Carl V. Nelson 申请号：US10942146 申请日：20040916 公开号：US07078906B2 公开日：20060718 专利内容由知识产权出版社提供 专利附图：摘要：A metal detector capable of operating...
专利名称：From time domain to frequency domain and the method of executing the domain conversion of the digital signal in contrast to that 发明人：ファン， ハイビン,リン， シャオ,ラハルジャ，スザント,ユー， ロンシャン 申请号：JP2006532242 申请日：20040506 公开号：JP2007507789A 公开日...
According to a first preferred aspect of the instant invention, there is provided an efficient method of computing a 3D frequency domain waveform inversion based on 3D time domain modeling. In the preferred arrangement, 3D frequency doma... L Sirgue,JT Etgen,U Albertin,... - US 被引量: ...
The fluorescence lifetime can be measured in two principally different ways, in the frequency and time domains7. Frequency domain8,9,10,11and time-gating time domain12,13,14,15,16,17FLIM are most often done with wide-field detectors. However, time-correlated single photon counting (TCSPC) ...
Considering the use of dynamical systems in practical applications, often only limited regions in the time or frequency domain are of interest. Therefore, it usually pays off to compute local approximations of the used dynamical systems in the frequency and time domain. In this paper, we consider...
The proposed model operates in the time–frequency domain and decomposes an information-bearing matrix into two-dimensional deconvolution of factor matrices that represent the spectral dictionary and temporal codes. The deconvolution process has been optimized to yield sparse temporal codes through ...
Namely, (a) an accurate description of the seismic response needs detailed consideration for both time domain features and frequency domain features of earthquakes. Furthermore, a hand-crafted GM feature may not always be the best. (b) Multiple factors (e.g., target task, target accuracy, ...