Relevant bibliographies by topics / Symmetrical divergence speed

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Academic literature on the topic 'Symmetrical divergence speed'

Author: Grafiati
Published: 7 June 2025
Last updated: 2 August 2025

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Journal articles on the topic "Symmetrical divergence speed"

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Abdalsalam, Awadalla Ali Haj Ahmed. "Estimate Anti-symmetrical Divergence Modes of an Aircraft Wing Utilizing Aero-structure Analysis via Aerodynamic Lifting Line Theory." Engineering and Technology Journal 9, no. 10 (2024): 5321–28. https://doi.org/10.5281/zenodo.13923103.

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This work illustrates the use of numerical matrix iteration to determine an aircraft wing's divergence speed using the aerodynamic span effects. The work starts with the construction of equilibrium equations in differential and integral forms. In this paper, integral formulas are used because they provide a convenient basis for numerical solutions of complex practical problems. Second, the straight-tapered wing has been divided into a number of Multhopp stations. Subsequently, the stations' torsional influence coefficient matrix has been calculated. Third, lifting line theory was used as a sui
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Abdalsalam, Awadalla Ali Haj Ahmed. "Aeroelastic Structural Analysis to Calculate Symmetrical Divergence Modes of an Aircraft Wing Using Aerodynamic Lifting Line Theory." Engineering and Technology Journal 9, no. 10 (2024): 5313–20. https://doi.org/10.5281/zenodo.13923060.

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This work explores the use of numerical matrix iteration to determine an aircraft wing's divergence speed using the aerodynamic span effects approach. The present work begins with the construction of equilibrium equations in differential and integral forms. In this paper, integral formulas are used because it serves as a convenient basis for numerical solutions of complex practical problems. Second, the straight-tapered wing is divided into a number of Multhopp stations. Subsequently, the stations' torsional influence coefficient matrix has been calculated. Third, lifting line theory was used
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Ge, Huilin, Zhiyu Zhu, Kang Lou, et al. "Classification of Infrared Objects in Manifold Space Using Kullback-Leibler Divergence of Gaussian Distributions of Image Points." Symmetry 12, no. 3 (2020): 434. http://dx.doi.org/10.3390/sym12030434.

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Infrared image recognition technology can work day and night and has a long detection distance. However, the infrared objects have less prior information and external factors in the real-world environment easily interfere with them. Therefore, infrared object classification is a very challenging research area. Manifold learning can be used to improve the classification accuracy of infrared images in the manifold space. In this article, we propose a novel manifold learning algorithm for infrared object detection and classification. First, a manifold space is constructed with each pixel of the i
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Chekhonadskikh, Alexander V. "An optimal gyroscopic stabilizer of a multidimensional vibration system." Analysis and data processing systems, no. 2 (June 28, 2022): 81–94. http://dx.doi.org/10.17212/2782-2001-2022-2-81-94.

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We study the stabilizing problem for a multidimensional vibration system using a gyroscopic stabilizer. A vibration system is given by a second order differential equation with symmetrical matrix coefficients: a positive definite stiffness matrix and an indefinite damping matrix; in general, such a system is unstable. We need find an optimal gyroscopic stabilizer for it represented by a skew-symmetric matrix coefficient in a speed term. The choice of this control type is dictated by the tendency to avoid additional vibrations caused by slip-slide friction. Its feature is a reduced order of the
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Maxwell, J. S., and W. M. King. "Dynamics and efficacy of saccade-facilitated vergence eye movements in monkeys." Journal of Neurophysiology 68, no. 4 (1992): 1248–60. http://dx.doi.org/10.1152/jn.1992.68.4.1248.

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1. Four macaque monkeys were trained to fixate visual targets. Eye movements were recorded binocularly using the search coil technique. Saccades, vergence movements, and combinations of the two were elicited by training the monkeys to alternate the gaze between real visual targets that differed in viewing distance and eccentricity with respect to the monkeys' heads. 2. When they shifted the gaze between targets that were at different viewing distances, the monkeys made vergence eye movements. For targets placed along the midsagittal plane, the monkeys often made binocularly symmetric vergence
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Wüst, Raimond M., Astrid M. L. Kappers, and Jan J. Koenderink. "Visuomotor Control of the Relative Movement of Random-Dot Patterns." Perceptual and Motor Skills 77, no. 1 (1993): 275–98. http://dx.doi.org/10.2466/pms.1993.77.1.275.

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A series of experiments were made on human performance in controlling optical relative movement. The aim was to test the influence of different kinds of relative movement on visually controlled steering tasks. Within adjacent displays on a computer screen random dot patterns moved in a fixed direction at continually changing speeds (Exp. 1) or ar constant speed and in continually changing directions (Exp. 2). The subject was required to compensate for the unpredictable modulations of the pattern movement by means of an isometric joystick. The task was to adjust relative movements involving pur
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Liffman, Kurt. "Relativistic Jet Flow from a One Dimensional Magnetic Nozzle—Analytic Solutions." Publications of the Astronomical Society of Australia 18, no. 3 (2001): 267–80. http://dx.doi.org/10.1071/as01034.

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AbstractMagnetohydrodynamic devices that can accelerate plasmas to speeds of the order of hundreds of kilometres per second have been designed and built for nearly forty years. Up to the time of writing, however, the theory for such devices has been exclusively non-relativistic. In this paper we derive the special relativistic magnetohydrodynamic (SRMHD) equations and use them to obtain the relativistic, magnetic nozzle equation which describes the production of jet flows with speeds approaching the speed of light.We obtain analytic solutions to this equation and show that, in principle, magne
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Wickert, J. A., and C. D. Mote. "Classical Vibration Analysis of Axially Moving Continua." Journal of Applied Mechanics 57, no. 3 (1990): 738–44. http://dx.doi.org/10.1115/1.2897085.

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Axially moving continua, such as high-speed magnetic tapes and band saw blades, experience a Coriolis acceleration component which renders such systems gyroscopic. The equations of motion for the traveling string and the traveling beam, the most common models of axially moving materials, are each cast in a canonical state space form defined by one symmetric and one skew-symmetric differential operator. When an equation of motion is represented in this form, the eigenfunctions are orthogonal with respect to each operator. Following this formulation, a classical vibration theory, comprised of a
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Kudryavtsev, Anatoly A., Chengxun Yuan, Shixin Zhao, Alexander M. Astafiev, Gennady D. Shabanov, and Alexander S. Chirtsov. "Visualization of the vortex structure formation of a long-lived afterglow arising in a symmetrical pulsed discharge." Journal of Physics: Conference Series 2709, no. 1 (2024): 012002. http://dx.doi.org/10.1088/1742-6596/2709/1/012002.

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Abstract A visualization of the emerging toroidal vortex in the long-lived afterglow of a high-current symmetrical pulse discharge with an electrolyte anode has been carried out. The visualization of the emerging vortex flow was carried out using the laser knife method using a powerful 10 W laser, which formed a flat divergent beam, which was reflected from dust particles in the atmosphere. For greater contrast, water vapor was let in into the region of the discharge and the emerging afterglow, which moved synchronously with the emerging afterglow vortex. The laser beam reflected from small wa
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Pucci, Micol, Stefania Zanforlin, Valerio Maiorino Conte, and Alessandro Saccardi. "Behaviour of a tidal turbine system using a diffuser in waters characterized by low speeds and the presence of surface waves typical of the Mediterranean Sea." Journal of Physics: Conference Series 2648, no. 1 (2023): 012007. http://dx.doi.org/10.1088/1742-6596/2648/1/012007.

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Abstract The exploitation of the kinetic energy of the Mediterranean Sea tidal currents is hindered by low speed values. Therefore, it is useful to investigate methods for accelerating the flow to increase both the power generated by the single machine and the specific power, i.e. related to a certain sea surface. The aim of the study is predicting the power gain achievable by means of a diffuser in very low speed conditions and also to analyse the behaviour of the diffuser in the presence of small amplitude and high frequency surface waves, typical of the Mediterranean. Using 3D CFD simulatio
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Book chapters on the topic "Symmetrical divergence speed"

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Steane, Andrew M. "Black holes." In Relativity Made Relatively Easy Volume 2. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192895646.003.0020.

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We discuss event horizons and black holes. First Birkhoff’s theorem is derived, and we consider the general nature of spherically symmetric spaces. Then the concepts of null surface, Killing horizon and event horizon are defined and related to one another. Cosmic censorship is briefly discussed. The Schwarzshild horizon is discussed in detail. The divergence or otherwise of redshift, acceleration, speed and proper time is obtained for infalling observers and for Schwarzschild observers. Eddington-Finkelstein coordinates are introduced and used to discuss gravitational collapse. The growth of t
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Conference papers on the topic "Symmetrical divergence speed"

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Sharma, Amit Kumar, Ashish Vashishtha, Dean Callaghan, Srinivasan Rao Bakshi, M. Kamaraj, and Ramesh Raghavendra. "Investigation of a Modified Circular Nozzle for Cold Spray Applications." In ITSC 2023. ASM International, 2023. http://dx.doi.org/10.31399/asm.cp.itsc2023p0235.

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Abstract The current work numerically evaluates the efficacy of a coflowing nozzle for cold spray applications with the aim to mitigate nozzle clogging by reducing the length of its divergent section. The high-pressure nitrogen flow through convergentdivergent axis-symmetric nozzles was simulated and the particle acceleration is modelled using a 2-way Lagrangian technique which is validated using experimental results. An annular co-flow nozzle with a circular central nozzle has been modelled for nitrogen gas. Reduction of nozzle divergent length from 189 mm to 99 mm showed an approximate 2.2%
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Sharma, A. K., A. Vashishtha, D. Callaghan, et al. "Particle Acceleration Through Coaxial Co-Flow Nozzles for Cold Spray Applications." In ITSC2022. DVS Media GmbH, 2022. http://dx.doi.org/10.31399/asm.cp.itsc2022p0676.

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Abstract The present study numerically investigates the effectiveness of co-flowing nozzles for cold spray applications. A convergent-divergent axi-symmetric nozzle system was simulated with high-pressure nitrogen flow. The particle acceleration is modelled by a two-way Lagrangian approach and validated with reference to experimental values reported in the literature. An annular co-flowing nozzle with circular central nozzle was simulated for nitrogen gas flow. The momentum preservation for central nozzle flow was observed, which results in higher particle speed for longer axial distance after
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Durmaz, Seher, and Metin O. Kaya. "Aeroelastic Response of an Aircraft Wing Modeled as a Thin-Walled Composite Beam." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64261.

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This study reports static and dynamic aeroelastic analyses of an aircraft wing in an incompressible flow. A swept thin-walled composite beam with a biconvex cross-section is used as the structural model that incorporates a number of non-classical effects such as material anisotropy, transverse shear deformation and warping restraint. A symmetric lay-up configuration i.e. circumferentially asymmetric stiffness (CAS) is further adapted to this model to generate the coupled motion of flap-wise bending-torsion-transverse shear. For this beam model, the unsteady aerodynamic loads are expressed usin
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Hürst, C., A. Schulz, and S. Wittig. "Comparison of Calculated and Measured Heat Transfer Coefficients for Transonic and Supersonic Boundary-Layer Flows." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-173.

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The present study compares measured and computed heat transfer coefficients for high speed boundary layer nozzle flows under engine Reynolds-number conditions (U∞ = 230 ÷ 880 m/s, Re* = 0.37 ÷ 1.07 · 106). Experimental data have been obtained by heat transfer measurements in a two-dimensional, non-symmetric, convergent-divergent nozzle. The nozzle wall is convectively cooled using water passages. The coolant heat transfer data and nozzle surface temperatures are used as boundary conditions for a three-dimensional finite-element code which is employed to calculate the temperature distribution i
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