Relevant bibliographies by topics / Numerical Synthesis

Academic literature on the topic 'Numerical Synthesis'

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Published: 14 March 2023

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Journal articles on the topic "Numerical Synthesis"

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Miles, M. D., and E. R. Funke. "NUMERICAL COMPARISON OF WAVE SYNTHESIS METHODS." Coastal Engineering Proceedings 1, no. 21 (January 29, 1988): 6. http://dx.doi.org/10.9753/icce.v21.6.

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A numerical comparison study is carried out on a variety of methods for synthesizing pseudo-random Gaussian wave records for laboratory wave generation. Three nonharmonic superposition methods and three time domain filtering procedures are compared to a harmonic FFT technique. The synthesis methods are evaluated on the basis of a statistical analysis of 16 standard wave parameters obtained from a set of 200 wave records. Second order group-bounded long wave components are also investigated.
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Swart, W. A., and J. C. Olivier. "Numerical synthesis of arbitrary discrete arrays." IEEE Transactions on Antennas and Propagation 41, no. 8 (1993): 1171–74. http://dx.doi.org/10.1109/8.244665.

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Kazakov, A. V., S. A. Khaustov, R. B. Tabakaev, and Y. A. Belousova. "Numerical simulation of synthesis gas incineration." IOP Conference Series: Materials Science and Engineering 124 (April 2016): 012110. http://dx.doi.org/10.1088/1757-899x/124/1/012110.

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Bilbao, Stefan. "Conservative numerical methods for sound synthesis." Journal of the Acoustical Society of America 119, no. 5 (May 2006): 3325. http://dx.doi.org/10.1121/1.4786365.

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Lakshmikantha, M. G., A. Bhattacharya, and J. A. Sekhar. "Numerical modeling of solidification combustion synthesis." Metallurgical Transactions A 23, no. 1 (January 1992): 23–34. http://dx.doi.org/10.1007/bf02660847.

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Ларюнин, Олег, and Oleg Laryunin. "Numerical synthesis of ionograms in horizontally inhomogeneous ionosphere on the basis of compound parabolic layer model." Solar-Terrestrial Physics 2, no. 3 (October 27, 2016): 74–86. http://dx.doi.org/10.12737/22286.

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Characteristic U-shaped traces (cusps) on ionograms have been identified as off-angle echoes from sloping electron density contours caused by the presence of traveling ionospheric disturbances (TIDs). Temporal evolution of the cusps is associated with horizontal drift of the disturbances. A potential for reducing calculation time in numerical synthesis of vertical ionograms is under discussion. Since numerical ray tracing is computationally intensive, we have developed simplified formulation for this study. The suggested model of compound parabolic layer allows us to analytically calculate ray paths. Changes in the shape of the ionogram cusp caused by varying TID characteristics are examined.
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Wen, Shenjie, and Lei Zhu. "NUMERICAL SYNTHESIS DESIGN OF COUPLED RESONATOR FILTERS." Progress In Electromagnetics Research 92 (2009): 333–46. http://dx.doi.org/10.2528/pier09041102.

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Geffe, P. R. "On numerical technique in analog filter synthesis." IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing 44, no. 4 (April 1997): 336–38. http://dx.doi.org/10.1109/82.566653.

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Olen, C. A., and R. T. Compton. "A numerical pattern synthesis algorithm for arrays." IEEE Transactions on Antennas and Propagation 38, no. 10 (1990): 1666–76. http://dx.doi.org/10.1109/8.59781.

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Egorov, Yu G., G. Yu Kiryachenko, and E. A. Popov. "Numerical Methods of Suboptimal Programs Synthesis for Accelerometer Unit." Giroskopiya i Navigatsiya 29, no. 2 (2021): 47–58. http://dx.doi.org/10.17285/0869-7035.0062.

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The paper presents the results of synthesis of calibration programs consisting of 9 and 18 measurement positions. The synthesis was performed by numerical methods for scalar (invariant) technique of accelerometer unit calibration. The resulting programs are compared to the existing calibration programs which have been obtained analytically. The results of mathematical simulation and field experiment confirm the theoretical calculations, as well as the effective application of the obtained calibration programs.
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Dissertations / Theses on the topic "Numerical Synthesis"

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Graham, R. K. "Numerical synthesis of dual-reflector antenna systems." Thesis, University of Southampton, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373929.

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Bärlund, Johnny. "Numerical Investigation on Spherical Harmonic Synthesis and Analysis." Thesis, KTH, Geodesi och satellitpositionering, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171779.

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In this thesis work the accuracy of the spherical harmonic synthesis and analysis are investigated, by simulated numerical studies.The main idea is to investigate the loss of accuracy, in the geopotential coeffcients, by the following testing method. We start with a synthesis calculation, using the coefficients(EGM2008), to calculate geoid heights on a regular grid. Those geoid heights are then used in an analysis calculation to obtain a new set of coeffcients, which are in turn used to derive a new set of geoid heights. The difference between those two sets of geoid heights will be analyzed to assess the accuracy of the synthesis and analysis calculations.The tests will be conducted with both point-values and area-means in the blocks in the grid. The area-means are constructed in some different ways and will also be compared to the mean value from 10000 point values as separate tests. Numerical results from this investigation show there are signifi…cant systematic errors in the geoid heights computed by spherical harmonic synthesis and analysis, sometimes reaching as high as several meters. Those big errors are most common at the polar regions and at the mid-latitude regions.
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Procacci, Alberto. "Numerical simulation of nanoparticle synthesis in a turbulent jet." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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In questo lavoro viene presentato un modello matematico per la simulazione della formazione e crescita di nanoparticelle di Silicio nella camera di reazione di una torcia al plasma ad induzione. Le simulazioni sono state condotte adottando modelli di turbolenza diversi, per evidenziare l'impatto di questo fenomeno sulla sintesi di nanoparticelle. Le simulazioni effettuate mostrano che il modello matematico fornisce risultati coerenti con i fenomeni fisici.
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Gao, Xitong. "Structural optimization of numerical programs for high-level synthesis." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/42498.

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This thesis introduces a new technique, and its associated tool SOAP, to automatically perform source-to-source optimization of numerical programs, specifically targeting the trade-off among numerical accuracy, latency, and resource usage as a high-level synthesis flow for FPGA implementations. A new intermediate representation, MIR, is introduced to carry out the abstraction and optimization of numerical programs. Equivalent structures in MIRs are efficiently discovered using methods based on formal semantics by taking into account axiomatic rules from real arithmetic, such as associativity, distributivity and others, in tandem with program equivalence rules that enable control-flow restructuring and eliminate redundant array accesses. For the first time, we bring rigorous approaches from software static analysis, specifically formal semantics and abstract interpretation, to bear on program transformation for high-level synthesis. New abstract semantics are developed to generate a computable subset of equivalent MIRs from an original MIR. Using formal semantics, three objectives are calculated for each MIR representing a pipelined numerical program: the accuracy of computation and an estimate of resource utilization in FPGA and the latency of program execution. The optimization of these objectives produces a Pareto frontier consisting of a set of equivalent MIRs. We thus go beyond existing literature by not only optimizing the precision requirements of an implementation, but changing the structure of the implementation itself. Using SOAP to optimize the structure of a variety of real world and artificially generated arithmetic expressions in single precision, we improve either their accuracy or the resource utilization by up to 60%. When applied to a suite of computational intensive numerical programs from PolyBench and Livermore Loops benchmarks, SOAP has generated circuits that enjoy up to a 12x speedup, with a simultaneous 7x increase in accuracy, at a cost of up to 4x more LUTs.
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Meister, Neil E. "Application of numerical optimization techniques to surface combatant design synthesis." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA355524.

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Thesis (M.S. in Mechanical Engineering) Naval Postgraduate School, September 1998.
"September 1998." Thesis advisor(s): Matthew D. Kelleher, C.N. Calvano. Includes bibliographical references (p. 229-230). Also available online.
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Lou, Zhenjun. "Kinematic representations and numerical methods in precision position synthesis of mechanisms." Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429316.

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Sargolzaei, Parviz. "Numerical synthesis of a single offset reflector with dielectric cone feed." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242409.

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Pšeno, Daniel. "Buzené chaotické oscilátory." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219111.

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The theme of this masters thesis are driven chaotic oscillators. The aim of this project is show the various types of driven chaotic oscillator and propose mathematical model solutions using numerical methods. In the first part of this thesis are shown theory of chaos, history of chaos theory, chaotic systems and chaos quantifiers. Next is numerical analysis of differential equations second order by Runge-Kutta fourth order method. Next part contains circuit blocks and synthesis of oscillators. In next part are defined all types of oscillators. Parameters of analysis, equations, circuits and simulations are defined for each type of driven chaotic oscillators. In each subchapter is design electrical circuit. This circuit is simulated and some of them realized.
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Ivie, Jimmy John. "A numerical model of the synthesis of carbon black by benzene pyrolysis." Thesis, Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/10954.

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Orr, Sarah Isobel. "Numerical simulation of coupled strings with application to physics-based sound synthesis." Thesis, Queen's University Belfast, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.602783.

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The work in this thesis presents and discusses new techniques for modelling string instrument vibrations for the purpose of physics-based sound synthesis. The work focuses on coupled systems, where phenomena such as sympathetic vibrations should naturally occur. Finite difference (FD) methods are chosen for modelling string vibrations for to their flexibility both in terms of local adjustments and possible extensions to nonlinearities. The resonating body is represented using a modal formulation. Modelling the body in such a way has the advantage of scalability which can improve efficiency. This is shown to be possible without affecting the overall timbre of the sound. The models were formulated using idealised shapes such as the beam and plate, but the modal formulation is general for all linear systems. A technique for interfacing the FD model of the string to the modal formulation of the body is presented. In this way the advantages of both methods are exploited, improving the balance between accurate and efficiency. Initially, this coupling is formulated using only transverse motion but is then extended to include longitudinal motion. In simulations of a harp-like instrument where the strings are coupled to the body at an angle, results obtained with numerical experiments show that including longitudinal vibrations impacts the eigenmodes of the system and prove essential for accurately modelling sympathetic vibrations. Comparisons with previous studies validate these results. By applying the proposed method to model resembling a simplified piano, online changes to parameters such as soundboard density further demonstrate the proposed technique.
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Books on the topic "Numerical Synthesis"

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Sriwattanathamma, Jen, ed. Robot kinematics: Symbolic automation and numerical synthesis. Norwood, N.J: Ablex Pub. Corp., 1990.

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Michiel, Hazewinkel, Jurkovich Ray, Paelinck Jean H. P, and Erasmus Universiteit Rotterdam. Steering Committee on Interdisciplinary Studies., eds. Bifurcation analysis: Principles, applications, and synthesis. Dordrecht: D. Reidel Pub. Co., 1985.

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Meister, Neil E. Application of numerical optimization techniques to surface combatant design synthesis. Monterey, Calif: Naval Postgraduate School, 1998.

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Bilbao, Stefan D. Numerical sound synthesis: Finite difference schemes and simulation in musical acoustics. [Hoboken]: John Wiley & Sons, 2009.

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Meta-analysis, decision analysis, and cost-effectiveness analysis: Methods for quantitative synthesis in medicine. New York: Oxford University Press, 1994.

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Wilson, R. Gale. Numerical aperture limits on efficient ball lens coupling of laser diodes to single-mode fibers with defocus to balance spherical aberration. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1994.

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Wilson, R. Gale. Numerical aperture limits on efficient ball lens coupling of laser diodes to single-mode fibers with defocus to balance spherical aberration. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1994.

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Lorenzo, Pareschi, and Russo Giovanni, eds. Modelling and numerics of kinetic dissipative systems. Hauppauge, N.Y: Nova Science Publishers, 2005.

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Bilbao, Stefan. Numerical Sound Synthesis. Wiley & Sons, Incorporated, John, 2009.

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Holloway, Ian D., and Daniel Ansari. Numerical Symbols. Edited by Roi Cohen Kadosh and Ann Dowker. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199642342.013.56.

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Human culture is founded upon an understanding of mathematics. Mathematics, in turn, is built upon a basic competency for abstracting and symbolizing numerical information. Although cognitive science has made great strides in the characterization of human knowledge, the understanding and use of numerical symbols remains largely unexplored. In this chapter we synthesize the current scientific understanding of numerical symbol processing using a synthesis of behavioral and neuroscientific findings. In particular, the chapter focuses on two interrelated topics: the processing of the semantics of numerical symbols and the processing of numerical symbols as audio-visual percepts. We conclude by proposing several avenues of inquiry about numerical symbols that can be traversed by future researchers.
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Book chapters on the topic "Numerical Synthesis"

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Bret, Michel. "Numerical images." In Image Synthesis, 11–42. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2568-0_2.

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Loyau, H., and D. Vandromme. "TC5 Synthesis." In Notes on Numerical Fluid Mechanics (NNFM), 456–71. Wiesbaden: Vieweg+Teubner Verlag, 1998. http://dx.doi.org/10.1007/978-3-322-89859-3_49.

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Periaux, Jacques, Gabriel Bugeda, Panagiotis K. Chaviaropoulos, Kyriakos Giannakoglou, Stephane Lanteri, and Bertrand Mantel. "Synthesis of Test Cases." In Notes on Numerical Fluid Mechanics (NNFM), 289–330. Wiesbaden: Vieweg+Teubner Verlag, 1998. http://dx.doi.org/10.1007/978-3-322-90193-4_4.

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Periaux, Jacques, Gabriel Bugeda, Panagiotis K. Chaviaropoulos, Kyriakos Giannakoglou, Stephane Lanteri, and Bertrand Mantel. "Synthesis of Test Cases." In Notes on Numerical Fluid Mechanics (NNFM), 451–61. Wiesbaden: Vieweg+Teubner Verlag, 1998. http://dx.doi.org/10.1007/978-3-322-90193-4_9.

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Kolditz, Olaf, Uwe-Jens Görke, Heinz Konietzky, Jobst Maßmann, Mathias Nest, Holger Steeb, Frank Wuttke, and Thomas Nagel. "Synthesis and Outlook." In GeomInt–Mechanical Integrity of Host Rocks, 227–42. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61909-1_6.

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AbstractAs a result of the GeomInt research project (Chap. 1) a broad combined experimental and numerical platform for the investigation of discontinuities due to swelling and shrinking processes (WP1, Sect. 2.3), pressure-driven percolation (WP2, Sect. 2.4) and stress redistribution (WP3, Sect. 2.4) for important reservoir and barrier rocks (clay, salt, crystalline) has been developed. Model comparisons for damage and fracture processes driven by different processes provide information on the optimal areas of application of the numerical methods (Sect. 2.5).
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Deville, M. O., T. H. Lê, and Y. Morchoisne. "Final Synthesis and Concluding Remarks." In Notes on Numerical Fluid Mechanics (NNFM), 140–49. Wiesbaden: Vieweg+Teubner Verlag, 1992. http://dx.doi.org/10.1007/978-3-663-00221-5_14.

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Dervieux, A., M. Braza, and J. P. Dussauge. "Elements of Synthesis and Conclusion." In Notes on Numerical Fluid Mechanics (NNFM), 573–80. Wiesbaden: Vieweg+Teubner Verlag, 1998. http://dx.doi.org/10.1007/978-3-322-89859-3_63.

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Dussauge, J.-P. "Synthesis on compressible mixing layers." In Notes on Numerical Fluid Mechanics (NNFM), 52–57. Wiesbaden: Vieweg+Teubner Verlag, 1998. http://dx.doi.org/10.1007/978-3-322-89859-3_7.

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Roux, B., G. Vahl Davis, M. Deville, R. L. Sani, and K. H. Winters. "General Synthesis of the Numerical Results." In Numerical Simulation of Oscillatory Convection on Low-Pr Fluids, 285–303. Wiesbaden: Vieweg+Teubner Verlag, 1990. http://dx.doi.org/10.1007/978-3-322-87877-9_36.

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Johnson, Raymond. "Spectral Synthesis and $$H^1(\mathbb {R})$$." In Applied and Numerical Harmonic Analysis, 53–57. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69637-5_3.

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Conference papers on the topic "Numerical Synthesis"

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Seldin, J. H., and J. R. Fienup. "Numerical Investigation of Phase Retrieval Uniqueness." In Signal Recovery and Synthesis. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/srs.1989.fa2.

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The uniqueness of phase retrieval has been explored from a theoretical standpoint via the factorability of polynomials. The Fourier transform of a function (an image), f, sampled on a regular grid is a polynomial, F. Bruck and Sodin [1] have shown that if f can be written as the convolution of K non-Hermitian functions (equivalent to K irreducible polynomial factors in Fourier space), then there exist 2K-1 ambiguous solutions to the phase retrieval problem of reconstructing f from IFI. It is well known for the two-dimensional case that polynomials of two complex variables have probability zero of being factorable [1-3]. It has also been shown from a theoretical standpoint that the uniqueness condition is not sensitive to noise [4]. However, this does not answer the practical question: what is the likelihood of significant ambiguity when IFI is corrupted by a given level of noise? We approached this question by trying to determine, given an arbitrary image and its Fourier polynomial, how close is the nearest factorable polynomial, and does it have an ambiguous solution that is significantly different from the given polynomial? This paper explores this question for the case of images defined within a 3x2 support. A derivation of object-domain conditions for factorability provides a means for finding nearest factorable polynomials through a constrained minimization search over the space of 3x2 ambiguous images. These searches are implemented with different object-domain constraints in a Monte Carlo simulation to estimate the probability that the nearest factorable polynomial, with an ambiguous solution that is significantly different from a given image, is within some distance of the given polynomial.
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Gutman, Semion, Michael V. Klibanov, and Hua Song. "Two Numerical Methods of Image Reconstruction in Diffusion Tomography." In Signal Recovery and Synthesis. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/srs.1995.rtua2.

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We consider Inverse Scattering Problem (ISP) for the Diffusion Equation (1) The ISP consists in determination of either of coefficients D(x) or a(x) given function u(x,t)|∂-Ω = φ(x,t), where ∂ Ω is a boundary of a bounded domain Ω ⊂ ℝn.
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Pierri, R., G. Leone, and R. Bernini. "Material characterization via phaseless tomography : numerical results in phase retrieval." In Signal Recovery and Synthesis. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/srs.1998.sthc.3.

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The diffraction tomography is a new method in which the complex permittivity profile of an object is reconstructed using algorithms that require the knowledge of both the amplitude and the phase of the scattered field [1-2]. However the difficulty of obtaining the phase of the scattered field at optical frequencies has limited the practical applications of diffraction tomography.
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Romanovich, A. G., and A. A. Kalinin. "Numerical synthesis of cylindrical arrays." In 2012 6th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS). IEEE, 2012. http://dx.doi.org/10.1109/uwbusis.2012.6379802.

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Long, David G., and David E. Early. "Comparison of Several Numerical Algorithms for Image Reconstruction from Irregular Samples." In Signal Recovery and Synthesis. Washington, D.C.: OSA, 2001. http://dx.doi.org/10.1364/srs.2001.swc3.

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Testorf, Markus, and Michael A. Fiddy. "Numerical optimization of diffractive optical elements for planar-integrated free-space optics." In Signal Recovery and Synthesis. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/srs.1998.swb.3.

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Planar-integrated free-space optics1,2 is a promising scheme to integrate large scale optical systems into a thick transparent substrate of plane-parallel geometry. For this approach all optical elements are located on the surfaces of the substrate (Fig. 1). Light signals propagate along a folded optical axis. All elements of the entire optical system form a two dimensional structure. This makes planar-integrated optics compatible with micro-electronics and allows, for instance, the fabrication of the system as a single diffractive optical surface relief by use of standard photo-lithographic techniques.
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Penna, Giuseppe Della, Daniele Magazzeni, Alberto Tofani, Benedetto Intrigila, Igor Melatti, and Enrico Tronci. "Automatic Synthesis of Robust Numerical Controllers." In Third International Conference on Autonomic and Autonomous Systems (ICAS'07). IEEE, 2007. http://dx.doi.org/10.1109/conielecomp.2007.59.

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Miles, M. D., and E. R. Funke. "Numerical Comparison of Wave Synthesis Methods." In 21st International Conference on Coastal Engineering. New York, NY: American Society of Civil Engineers, 1989. http://dx.doi.org/10.1061/9780872626874.007.

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Chen, Shu-Lin, Pei-Yuan Qin, Y. Jay Guo, Yanhui Liu, and Pengfei You. "Array pattern synthesis using numerical pattern synthesis algorithm including mutual coupling." In 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2017. http://dx.doi.org/10.1109/apusncursinrsm.2017.8073190.

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Schmiedel, H., and F. Arndt. "Numerical Synthesis of Simple Waveguide Mode Sensors." In 13th European Microwave Conference, 1983. IEEE, 2006. http://dx.doi.org/10.1109/euma.1983.333186.

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Reports on the topic "Numerical Synthesis"

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Nagayama, Shinobu, Tsutomu Sasao, and Jon T. Butler. Programmable Numerical Function Generators Based on Quadratic Approximation: Architecture and Synthesis Method. Fort Belvoir, VA: Defense Technical Information Center, January 2006. http://dx.doi.org/10.21236/ada599939.

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Levesque, Justine, Nathaniel Loranger, Carter Sehn, Shantel Johnson, and Jordan Babando. COVID-19 prevalence and infection control measures at homeless shelters and hostels in high-income countries: protocol for a scoping review. York University Libraries, 2021. http://dx.doi.org/10.25071/10315/38513.

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The COVID-19 pandemic has disproportionately impacted people experiencing homelessness. Homeless shelters and hostels, as congregate living spaces for residents with many health vulnerabilities, are highly susceptible to outbreaks of COVID-19. A synthesis of the research-to-date can inform evidence-based practices for infection, prevention, and control strategies at these sites to reduce the prevalence of COVID-19 among both shelter/hostel residents and staff. Methods: A scoping review in accordance with Arksey and O’Malley’s framework will be conducted to identify literature reporting COVID-19 positivity rates among homeless shelter and hostel residents and staff, as well as infection control strategies to prevent outbreaks in these facilities. The focus will be on literature produced in high-income countries. Nine academic literature databases and 11 grey literature databases will be searched for literature from March 2020 to July 2021. Literature screening will be completed by two reviewers and facilitated by Covidence, a systematic review management platform. A third reviewer will be engaged to resolve disagreements and facilitate consensus. A narrative summary of the major themes identified in the literature, numerical counts of relevant data including the COVID-19 positivity rates, and recommendations for different infection control approaches will be produced. Discussion: The synthesis of the research generated on COVID-19 prevalence and prevention in homeless shelters and hostels will assist in establishing best practices to prevent the spread of COVID-19 and other airborne diseases at these facilities in high-income countries while identifying next steps to expand the existing evidence base.
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Ding, Yan, Q. Chen, Ling Zhu, Julie Rosati, and Bradley Johnson. Implementation of flexible vegetation into CSHORE for modeling wave attenuation. Engineer Research and Development Center (U.S.), February 2022. http://dx.doi.org/10.21079/11681/43220.

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This technical report presents the new numerical modeling capabilities for simulating wave attenuation and mean water level changes through flexible vegetation such as smooth cordgrass in coastal and marine wetlands. These capabilities were implemented into the Cross-SHORE (CSHORE) numerical model. The biomechanical properties of vegetation such as dimensions, flexibility, and bending strength are parameterized in terms of the scaling law. Correspondingly, a new formulation of the vegetation drag coefficient, CD, is developed using field data from a salt marsh in Terrebonne Bay, LA, by considering spatially varying effective stem and blade heights of species. This report also presents a general procedure for using the model to simulate hydrodynamic variables (i.e., waves, currents, mean water levels) at vegetated coasts, which are used to quantify the effects of wave attenuation and reduction of surge and runup due to vegetation. Preliminary model validation was conducted by simulating a set of laboratory experiments on synthetic vegetation, which mimicked the flexibility of Spartina alterniflora. The validation results indicate that the newly developed vegetation capabilities enable CSHORE to predict changes of wave heights and water levels through marshes by considering species-specific biomechanical features. The model is also applicable to assess vegetation effectiveness against waves and surges.
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4

Nadal-Caraballo, Norberto C., Madison C. Yawn, Luke A. Aucoin, Meredith L. Carr, Jeffrey A. Melby, Efrain Ramos-Santiago, Victor M. Gonzalez, et al. Coastal Hazards System–Louisiana (CHS-LA). US Army Engineer Research and Development Center, August 2022. http://dx.doi.org/10.21079/11681/45286.

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The US Army Engineer Research and Development Center (ERDC), Coastal and Hydraulics Laboratory (CHL) expanded the Coastal Hazards System (CHS) to quantify storm surge and wave hazards for coastal Louisiana. The CHS Louisiana (CHS-LA) coastal study was sponsored by the Louisiana Coastal Protection and Restoration Authority (CPRA) and the New Orleans District (MVN), US Army Corps of Engineers (USACE) to support Louisiana’s critical coastal infrastructure and to ensure the effectiveness of coastal storm risk management projects. The CHS-LA applied the CHS Probabilistic Coastal Hazard Analysis (PCHA) framework to quantify tropical cyclone (TC) responses, leveraging new atmospheric and hydrodynamic numerical model simulations of synthetic TCs developed explicitly for the Louisiana region. This report focuses on documenting the PCHA conducted for the CHS-LA, including details related to the characterization of storm climate, storm sampling, storm recurrence rate estimation, marginal distributions, correlation and dependence structure of TC atmospheric-forcing parameters, development of augmented storm suites, and assignment of discrete storm weights to the synthetic TCs. As part of CHS-LA, coastal hazards were estimated within the study area for annual exceedance frequencies (AEFs) over the range of 10 yr-1 to 1×10-4 yr-1.
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Nadal-Caraballo, Norberto, Madison Yawn, Luke Aucoin, Meredith Carr, Jeffrey Melby, Efrain Ramos-Santiago, Fabian Garcia-Moreno, et al. Coastal Hazards System–Puerto Rico and US Virgin Islands (CHS-PR). Engineer Research and Development Center (U.S.), December 2022. http://dx.doi.org/10.21079/11681/46200.

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The South Atlantic Coastal Study (SACS) was completed by the US Army Corps of Engineers to quantify storm surge and wave hazards allowing for the expansion of the Coastal Hazards System (CHS) to the South Atlantic Division (SAD) domain. The goal of the CHS-SACS was to quantify coastal storm hazards for present conditions and future sea level rise (SLR) scenarios to aid in reducing flooding risk and increasing resiliency in coastal environments. CHS-SACS was completed for three regions within the SAD domain, and this report focuses on the Coastal Hazards System–Puerto Rico and US Virgin Islands (CHS-PR). This study applied the CHS Probabilistic Coastal Hazard Analysis (PCHA) framework for quantifying tropical cyclone (TC) responses, leveraging new atmospheric and hydrodynamic numerical model simulations of synthetic TCs developed explicitly for the CHS-PR region. This report focuses on documenting the PCHA conducted for CHS-PR, including the characterization of storm climate, storm sampling, storm recurrence rate estimation, marginal distributions, correlation and dependence structure of TC atmospheric-forcing parameters, development of augmented storm suites, and assignment of discrete storm weights to the synthetic TCs. As part of CHS-PR, coastal hazards were estimated for annual exceedance frequencies over the range of 10 yr⁻¹ to 10⁻⁴ yr⁻¹.
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Melby, Jeffrey, Thomas Massey, Fatima Diop, Himangshu Das, Norberto Nadal-Caraballo, Victor Gonzalez, Mary Bryant, et al. Coastal Texas Protection and Restoration Feasibility Study : Coastal Texas flood risk assessment : hydrodynamic response and beach morphology. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41051.

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The US Army Corps of Engineers, Galveston District, is executing the Coastal Texas Protection and Restoration Feasibility Study coastal storm risk management (CSRM) project for the region. The project is currently in the feasibility phase. The primary goal is to develop CSRM measures that maximize national net economic development benefits. This report documents the coastal storm water level and wave hazard, including sea level rise, for a variety of flood risk management alternatives. Four beach restoration alternatives for Galveston Island and Bolivar peninsula were evaluated. Suites of synthetic tropical and historical non-tropical storms were developed and modeled. The CSTORM coupled surge-and-wave modeling system was used to accurately characterize storm circulation, water level, and wave hazards using new model meshes developed from high-resolution land and sub-aqueous surveys for with- and without-project scenarios. Beach morphology stochastic response was modeled with a Monte Carlo life-cycle simulation approach using the CSHORE morphological evolution numerical model embedded in the StormSim stochastic modeling system. Morphological and hydrodynamic response were primarily characterized with probability distributions of the number of rehabilitations and overflow.
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