Results 241 to 250 of about 1,042,695 (274)
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Television field scan linearization
Journal of the British Institution of Radio Engineers, 1960Although the design of a field timebase is based on well established principles and theory, there are many points at which there is considerable divergency between the theoretical and practical results. Foremost of these is that of calculating the parameters of linearizing networks, particularly of the feedback type.
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Torsion and linear accuracy in intraoral scans obtained with different scanning principles
Journal of Prosthodontic Research, 2020Few investigations have examined the production of single restorations using intraoral scanners (IOS). Data on full-arch scans are rare, and data regarding torsion within the entire arch are very sparsely reported. Therefore, the aim of this study was to examine the deviations of torsion and linear distances in full-arch scans of three IOS based on ...
Alexander, Schmidt +4 more
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Linear Retro-Beam Scanning Array System
IEEE Transactions on Antennas and Propagation, 2019A unique beam scanning array, neither applying spherical-to-plane wave transformation like a reflect array nor utilizing corporate feed network like a Butler matrix, is proposed and investigated in this paper. The governing equations of a common retro-directive array are revisited and generalized to fulfill a linear array having retro-beam scanning ...
Jhen-Jia Liao +3 more
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Scanning observability of linear systems
IEEE Transactions on Automatic Control, 1979In this note we consider the observability problem for a linear system when at each instant of time only one component of the system's state vector can be measured. It is shown that on any time interval there exists an observation policy such that the system is observable.
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Line-scan camera calibration: a robust linear approach
Applied Optics, 2020Camera calibration requires three steps: estimation of correspondences between world and image coordinates, computation of a linear solution, and nonlinear optimization using the linear estimate as a starting point. The resulting accuracy depends mostly on the first and final steps.
R. Usamentiaga +2 more
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Scanning linear polarimeter for aerosol sensing
SPIE Proceedings, 2006An imaging polarimeter for sensing of aerosol scattering and other atmospheric phenomena has been constructed and tested. The instrument is a testbed for a multispectral system architecture, in which spectral channels are added in a modular fashion using dichroic beamspltters and dedicated detectors.
Derek Sabatke +6 more
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Improving on Linear Scan Register Allocation
International Journal of Automation and Computing, 2018Register allocation is a major step for all compilers. Various register allocation algorithms have been developed over the decades. This work describes a new class of rapid register allocation algorithms and presents experimental data on their behavior.
Shahrzad Kananizadeh, Kirill Kononenko
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Automated Linear Book-Scanning System (ALBS)
2019 IEEE Jordan International Joint Conference on Electrical Engineering and Information Technology (JEEIT), 2019The design of an automated linear book-scanning system (ALBS), with several attributes, is proposed in this work. For a start, the moving saddle by a stepper motor can hold up to 3 Kg weight and the system contains a suitably designed channel slot. Such a design is implemented as a new variation on the idea of pneumatic page turning.
Osama W. Ata +2 more
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Linearized Collinearity Equations for Scanned Data
Journal of the Surveying and Mapping Division, 1977The collinearity equations, based upon modification of those common in conventional photogrammetry, must accommodate the continuous dynamic nature of the exterior orientation elements. Therefore, some types of functional behavior (polynomials, harmonics, etc.) must be assumed for those orientation elements.
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High resolution electronic-linear-scanning ultrasonic diagnostic equipment
Ultrasound in Medicine & Biology, 1979Abstract Electronic linear-scanning ultrasonic diagnostic equipment so far has suffered from low resolution. In the study presented here, improvement in resolution was obtained by electronic focusing and improved image quality by small-angle deflection.
K, Iinuma +6 more
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