نتایج جستجو برای: matched filtering
تعداد نتایج: 179674 فیلتر نتایج به سال:
An optoelectronic technique for 3D object recognition using single off-axis digital Fresnel hologram is demonstrated. Only one Fresnel digital hologram of the 3D object to be recognized is recorded. The electronic hologram is processed digitally to retrieve 3D object information encoded as a 2D digital image. Wavelet matched filtering is used to improve the discrimination capability of the corr...
Efficient and dependable methods for detection and measurement of synaptic events are important for studies of synaptic physiology and neuronal circuit connectivity. As the published methods with detection algorithms based upon amplitude thresholding and fixed or scaled template comparisons are of limited utility for detection of signals with variable amplitudes and superimposed events that hav...
Neutron stars are perhaps the most promising class of gravitational wave (GW) sources, and searches for such GW signals is particularly suited to the characteristics of the GEO600 detector (see Schutz “Getting Ready for GEO600 Data” gr–qc9910033). However, the instantaneous GW frequency of such a source will evolve due to both intrinsic spindown effects and Doppler modulations induced by the mo...
We describe a multiple target tracking (MTT) application in microneurography that estimate conduction velocity changes and recovery constants of human nerve C-fibers. Results using the tracking system on real data are presented. Action potentials (APs) were recorded from C-fibers in the peroneal nerve of awake human subjects. The APs were detected by a matched filter constituting a maximum like...
Impulse Radio Ultra Wideband (IR-UWB) signals are excellent candidates for use in radars for detection and monitoring of movements with small amplitude such as human breathing in presence of obstacles. This paper reports a method for noninvasive monitoring of human respiration using IR-UWB radar that is based on the detection of periodic variation in the time of arrival of the reflected pulse f...
Eastern Kerdous demonstrates a polymetallic hydrothermal activity due its association with paleorelief area. This study focuses on generating Mineral Potential Map based Fuzzy Logic Modelling and HyMap-Based input layers. The Relative Absorption Band Depth, Directed Principal Component Analysis, Line Density, Mixture Tuned Matched Filtering techniques were implemented to perform 20 thematic As ...
Polychromatic object recognition based on circular whitening preprocessing of red-green-blue components and multichannel matched filtering is described. Computer simulations and experimental results are provided to facilitate recognizing a color target among objects of similar shape but with different color contents. Experimental results are obtained with an optical correlator with two spatial ...
Wave mixing with a self-induced grating in a saturable absorber, which is inserted into a resonator, gives special filtering behavior. In a linear Fabry-Perot cavity with gain, the grating forms a self-matched, threemirror laser cavity that can discriminate between modes whose frequency difference is much lower than the grating bandwidth. The effect was used to obtain single-mode lasers with na...
In this paper we discuss some computational problems associated to matched filtering of experimental signals from gravitational wave interferometric detectors in a parallel-processing environment. We then specialize our discussion to the use of the APEmille and apeNEXT processors for this task. Finally, we accurately estimate the performance of an APEmille system on a computational load appropr...
Accurately assessing and optimizing the implosion performance of inertial confinement fusion capsules is a crucial step to achieving ignition on the NIF. We have applied differential filtering (matched Ross filter pairs) to provide broadband time-integrated absolute x-ray self-emission images of the imploded core of cryogenic layered implosions. This diagnostic measures the temperature- and den...
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