Results 41 to 50 of about 9,407,231 (337)
Journal of Geophysical Research: Atmospheres, 2019 Previous studies have reported boundary layer features related to air pollution. However, few studies have comprehensively evaluated the characteristics and mechanisms of vertical wind in the formation and evolution of heavy particulate matter pollution ...
Yuanjian Yang +6 more
semanticscholar +1 more source
Applied Sciences, 2021 Synchrosqueezing transform (SST) can effectively improve time-frequency precision and resolution by squeezing time-frequency spectra via instantaneous frequencies, and it has been applied in many diverse disciplines; however, the precision of estimated ...
Yong Li, Gulan Zhang
doaj +1 more source
High Time Resolution Astrophysics and Pulsars [PDF]
, 2007 The discovery of pulsars in 1968 heralded an era where the temporal characteristics of detectors had to be reassessed. Up to this point detector integration times would normally be measured in minutes rather seconds and definitely not on sub-second time scales.
openaire +2 more sources
Noise shaping Asynchronous SAR ADC based time to digital converter [PDF]
, 2018 Time-to-digital converters (TDCs) are key elements for the digitization of timing information in modern mixed-signal circuits such as digital PLLs, DLLs, ADCs, and on-chip jitter-monitoring circuits.
Katragadda, Sowmya
core +1 more source
BUILDING CHANGE DETECTION IN VERY HIGH RESOLUTION SATELLITE STEREO IMAGE TIME SERIES [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 There is an increasing demand for robust methods on urban sprawl monitoring. The steadily increasing number of high resolution and multi-view sensors allows producing datasets with high temporal and spatial resolution; however, less effort has been ...
J. Tian, R. Qin, D. Cerra, P. Reinartz
doaj +1 more source
High resolution time delay estimation [PDF]
ICASSP '87. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005 A new method is presented for estimating the arrival times of deterministic signal pulses that are separated by less than the duration of the signal autocorrelation function. The method is based on the observation that if the signal has a flat band-limited spectrum, then the maximum-likelihood estimator for the signal time of arrivals can be ...
openaire +1 more source
Frontiers in Physics3D trench silicon pixel sensors, recently developed by the TimeSPOT collaboration, have shown excellent performance in terms of spatial resolution, timing precision and detection efficiency.
F. Borgato +17 more
doaj +1 more source
High-resolution imaging algorithm based on temporal focal characteristic of time-reversed signal
Systems Science & Control Engineering, 2019 Although the high-resolution materials can improve the resolution of the conventional time-reversal imaging (TRI) algorithms, they also limit the applications of TRI. In this paper, a new TRI algorithm with high-resolution is presented.
Guangmin Zhang +3 more
doaj +1 more source
A time lens for high resolution neutron time of flight spectrometers
, 2005 We examine in analytic and numeric ways the imaging effects of temporal neutron lenses created by traveling magnetic fields. For fields of parabolic shape we derive the imaging equations, investigate the time-magnification, the evolution of the phase ...
A. I. Frank +8 more
core +1 more source
Time-gated transillumination of biological tissues and tissuelike phantoms [PDF]
, 1994 The applicability and limits of time-resolved transillumination to determine the internal details of biological tissues are investigated by phantom experiments. By means of line scans across a sharp edge, the spatial resolution (Ax) and its dependence on
Andersson-Engels +17 more
core +1 more source