Log in

Relevant bibliographies by topics / Symmetrical divergence speed / Journal articles

To see the other types of publications on this topic, follow the link: Symmetrical divergence speed.

Journal articles on the topic 'Symmetrical divergence speed'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 37 journal articles for your research on the topic 'Symmetrical divergence speed.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

2

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

3

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

4

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

5

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

6

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

7

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

8

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

9

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

10

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

11

Gad-el-Hak, Mohamed. "The Response of Elastic and Viscoelastic Surfaces to a Turbulent Boundary Layer." Journal of Applied Mechanics 53, no. 1 (1986): 206–12. http://dx.doi.org/10.1115/1.3171714.

Full text

Abstract:

The unstable response of elastic and viscoelastic surfaces to a turbulent boundary layer was experimentally investigated in an 18-m towing tank. The compliant surface deformation was measured using a remote optical technique. The “Laser Displacement Gauge” employs a Reticon camera equipped with a linear array of 256 photodiodes spaced 25 microns apart. The device was used to measure the characteristics of two classes of hydroelastic instability waves that form on elastic or viscoelastic surfaces as a reuslt of the interaction with a turbulent boundary layer. The instability waves developing on

APA, Harvard, Vancouver, ISO, and other styles

12

Telloni, Daniele. "The Dipolar Solar Minimum Corona." Universe 7, no. 12 (2021): 507. http://dx.doi.org/10.3390/universe7120507.

Full text

Abstract:

The large-scale configuration of the UV solar corona at the minimum activity between solar cycles 22 and 23 is explored in this paper. Exploiting a large sample of spectroscopic observations acquired by the Ultraviolet Coronagraph Spectrometer aboard the Solar and Heliospheric Observatory in the two-year period of 1996–1997, this work provides the first-ever monochromatic O vi 1032 Å image of the extended corona, and the first-ever two-dimensional maps of the kinetic temperature of oxygen ions and the O vi1037/1032 Å doublet intensity ratio (a proxy for the outflow velocity of the oxygen compo

APA, Harvard, Vancouver, ISO, and other styles

13

Sakhno, Volodymyr, Svitlana Sharay, Igor Murovany, Igor Chovcha, and Vasyl Onyshchuk. "Influence of Constructive and Operational Factors on Stability of Movement of a Road Train with the Trailer of the O1 Category." Central Ukrainian Scientific Bulletin. Technical Sciences 1, no. 5(36) (2022): 244–55. http://dx.doi.org/10.32515/2664-262x.2022.5(36).1.244-255.

Full text

Abstract:

The issues of stability and controllability of cars and road trains (ATZ) in connection with their practical importance have been studied by many researchers. If the issues of transportation of bulky goods are studied well enough, then for the transportation of light cargo, which uses low-capacity road trains with simple single- or two-axle trailers, the issues of stability are not fully studied. Recommendations for changing the design parameters to improve a particular type of stability are different and sometimes contradict the requirements for other performance of the car, in particular, it

APA, Harvard, Vancouver, ISO, and other styles

14

Thompson, Andrew F., and Alberto C. Naveira Garabato. "Equilibration of the Antarctic Circumpolar Current by Standing Meanders." Journal of Physical Oceanography 44, no. 7 (2014): 1811–28. http://dx.doi.org/10.1175/jpo-d-13-0163.1.

Full text

Abstract:

Abstract The insensitivity of the Antarctic Circumpolar Current (ACC)’s prominent isopycnal slope to changes in wind stress is thought to stem from the action of mesoscale eddies that counterbalance the wind-driven Ekman overturning—a framework verified in zonally symmetric circumpolar flows. Substantial zonal variations in eddy characteristics suggest that local dynamics may modify this balance along the path of the ACC. Analysis of an eddy-resolving ocean GCM shows that the ACC can be broken into broad regions of weak eddy activity, where surface winds steepen isopycnals, and a small number

APA, Harvard, Vancouver, ISO, and other styles

15

Yang, Yongqi, Jiantai Dou, Jiaqing Xu, Bo Li, and Youyou Hu. "Propagation properties of partially coherent radially polarized rotationally-symmetric power-exponent-phase vortex beams in turbulent atmosphere." New Journal of Physics 25, no. 12 (2023): 123054. http://dx.doi.org/10.1088/1367-2630/ad17db.

Full text

Abstract:

Abstract In this paper, the propagation properties of partially coherent radially polarized rotationally-symmetric power-exponent-phase vortex beams (RP-RSPEPVBs) in turbulent atmosphere were investigated. Based on the extended Huygens-Fresnel principle and unified theory of coherence and polarization, the theoretical propagation model was established. Then, the numerical simulations were carried out to reveal the evolution of intensity distribution, spectral degree of coherence (DOC) and spectral degree of polarization (DOP) in turbulent atmosphere. The results showed that although the partia

APA, Harvard, Vancouver, ISO, and other styles

16

Fullard, L. A., E. C. P. Breard, C. E. Davies, et al. "The dynamics of granular flow from a silo with two symmetric openings." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 475, no. 2221 (2019): 20180462. http://dx.doi.org/10.1098/rspa.2018.0462.

Full text

Abstract:

The dynamics of granular flow in a rectangular silo with two symmetrically placed exit openings is investigated using particle image velocimetry (PIV), flow rate measurements and discrete element modelling (DEM). The flow of mustard seeds in a Perspex silo is recorded using a high-speed camera and the resulting image frames are analysed using PIV to obtain velocity, velocity divergence and shear rate plots. A change in flow structure is observed as the distance L between the two openings is varied. The mass flow rate is shown to be at a maximum at zero opening separation, decreasing as L is in

APA, Harvard, Vancouver, ISO, and other styles

17

Cui, Yusheng, Haibin Lü, Dawei Shi, Chuqi Xia, and Changming Dong. "A Comparative Study of the Landfall Precipitation by Tropical Cyclones ARB 01 (2002) and Luban (2018) near the Arabian Peninsula." Remote Sensing 14, no. 5 (2022): 1194. http://dx.doi.org/10.3390/rs14051194.

Full text

Abstract:

Considering the high risk of flooding during tropical cyclones (TCs), there is great practical significance in researching and predicting precipitation during TC landfalls. Using NECP FNL reanalysis data and GPM_MERGIR datasets, two TCs with similar trajectories, ARB 01 in 2002 and Luban in 2018, were analyzed. For ARB 01 and Luban, there are separate effects of wind shear at different heights on the development of vertical motion. Meridional wind shear affects the main deviation direction of vertical motion (downshear), while zonal wind shear mainly affects the deviation direction of vertical

APA, Harvard, Vancouver, ISO, and other styles

18

Rocha, P. L. B., S. Renous, A. Abourachid, and E. Höfling. "Evolution toward asymmetrical gaits in Neotropical spiny rats (Rodentia: Echimyidae): evidences favoring adaptation." Canadian Journal of Zoology 85, no. 6 (2007): 709–17. http://dx.doi.org/10.1139/z07-049.

Full text

Abstract:

The torch tail rat, Trinomys yonenagae Rocha, 1995 (family Echimyidae), is the morphologically most divergent of the spiny rats. In this study, we evaluate the hypothesis that gaits preferentially used by this species evolved as an adaptation to the desert-like dunes where they live. We filmed spontaneous locomotion of T. yonenagae, Trinomys albispinus minor Reis and Pessôa, 1995, and Proechimys cayennensis (Desmarest, 1817) with a high-speed camera. We detected, for each of the 323 cycles of the reference forelimb recorded, the kind of gait developed, the time lags between the touchdown of ea

APA, Harvard, Vancouver, ISO, and other styles

19

Pucci, Micol, and Stefania Zanforlin. "The Ability of Convergent–Divergent Diffusers for Wind Turbines to Exploit Yawed Flows on Moderate-to-High-Slope Hills." Energies 17, no. 5 (2024): 990. http://dx.doi.org/10.3390/en17050990.

Full text

Abstract:

Small-to-medium-sized wind turbines operate with wind speeds that are often modest, and it is therefore essential to exploit all possible means to concentrate the wind and thus increase the power extracted. The advantage that can be achieved by positioning the turbine on hilly reliefs, which act as natural diffusers, is well known, and some recent studies can be found on the effects of the characteristics of hilly terrain on the turbine performance. The literature shows numerous investigations on the behavior of ducted wind turbines, i.e., equipped with a diffuser. But so far, there is a lack

APA, Harvard, Vancouver, ISO, and other styles

20

Banichuk, N. V., S. Yu Ivanova, and V. S. Afanas'ev. "Structural Optimization of a Longitudinally Moving Layered Web Based on a Multi-Criteria Approach." Известия Российской академии наук. Механика твердого тела, no. 4 (July 1, 2023): 167–77. http://dx.doi.org/10.31857/s0572329923600093.

Full text

Abstract:

The longitudinal motion at a constant speed of a thin continuous elastic web through a system of roller bearings under the action of a given constant tension is considered. One span between adjacent supports is considered. The web is modeled by a thin layered plate hinged on two opposite edges, the remaining two sides of the plate are free. It is assumed that the plate in the process of longitudinal movement can perform small transverse vibrations. The layers of the plate from a given set of materials are arranged symmetrically to the middle surface and fit tightly to each other. The total thi

APA, Harvard, Vancouver, ISO, and other styles

21

Serafin, Stefano, and Dino Zardi. "Structure of the Atmospheric Boundary Layer in the Vicinity of a Developing Upslope Flow System: A Numerical Model Study." Journal of the Atmospheric Sciences 67, no. 4 (2010): 1171–85. http://dx.doi.org/10.1175/2009jas3231.1.

Full text

Abstract:

Abstract The development of a morning upslope flow is studied by means of idealized numerical simulations. In particular, two cases are examined: a plane slope connecting a lower plain and an elevated plateau and a symmetric mountain in the middle of a uniform plain. The analysis examines various steepness cases and aims at understanding the processes occurring in the area of transition between the upslope flow region and the convective boundary layers (CBLs) growing nearby. A characteristic sequence of events is recognized in the simulations, and their relationship with the along-slope variab

APA, Harvard, Vancouver, ISO, and other styles

22

Wu, Guorong, Zhanfei Zuo, and Yanggui Li. "Selection of Relative DEM Time Step for Modelling Fast Fluidized Bed of A-Type FCC Particles." Symmetry 15, no. 2 (2023): 488. http://dx.doi.org/10.3390/sym15020488.

Full text

Abstract:

In chemical production processes, the most suitable operation regime for A-Type powders such as typical FCC particles is high-speed fast fluidization owing to their uniquely advantageous properties. Discrete element method (DEM) for modelling fast fluidization with A-Type powders has rarely been reported. How to appropriately select the DEM time step and the stiffness coefficient is one of the most critical problems for stable and accurate calculation. This article mainly discusses the effect of the stiffness coefficient and DEM time step on simulations of A-type FCC particles. In order to des

APA, Harvard, Vancouver, ISO, and other styles

23

Sun, Xue, Chao-Chin Wu, and Yan-Fang Liu. "The Design and Implementation of an Improved Lightweight BLASTP on CUDA GPU." Symmetry 13, no. 12 (2021): 2385. http://dx.doi.org/10.3390/sym13122385.

Full text

Abstract:

In the field of computational biology, sequence alignment is a very important methodology. BLAST is a very common tool for performing sequence alignment in bioinformatics provided by National Center for Biotechnology Information (NCBI) in the USA. The BLAST server receives tens of thousands of queries every day on average. Among the procedures of BLAST, the hit detection process whose core architecture is a lookup table is the most time-consuming. In the latest work, a lightweight BLASTP on CUDA GPU with a hybrid query-index table was proposed for servicing the sequence query length shorter th

APA, Harvard, Vancouver, ISO, and other styles

24

Onken, Reiner, Burkard Baschek, and Ingrid M. Angel-Benavides. "Very high-resolution modelling of submesoscale turbulent patterns and processes in the Baltic Sea." Ocean Science 16, no. 3 (2020): 657–84. http://dx.doi.org/10.5194/os-16-657-2020.

Full text

Abstract:

Abstract. In order to simulate submesoscale turbulent patterns and processes (STPPs) and to analyse their properties and dynamics, the Regional Ocean Modeling System (ROMS) was run for June 2016 in a subregion of the Baltic Sea. To create a realistic mesoscale environment, ROMS with 500 m horizontal resolution (referred to as R500) is one-way nested into an existing operational model, and STPPs with horizontal scales <1 km are resolved with a second nest of 100 m resolution (R100). Both nests use 10 terrain-following layers in the vertical. The comparison of the R500 results with a satellit

APA, Harvard, Vancouver, ISO, and other styles

25

Awadalla Ali Haj Ahmed, Abdalsalam. "Estimate Anti-symmetrical Divergence Modes of an Aircraft Wing Utilizing Aero-structure Analysis via Aerodynamic Lifting Line Theory." Engineering and Technology Journal 09, no. 30 (2024). http://dx.doi.org/10.47191/etj/v9i10.09.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

26

Awadalla Ali Haj Ahmed, Abdalsalam. "Aeroelastic Structural Analysis to Calculate Symmetrical Divergence Modes of an Aircraft Wing Using Aerodynamic Lifting Line Theory." Engineering and Technology Journal 09, no. 30 (2024). http://dx.doi.org/10.47191/etj/v9i10.08.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

27

"Ocular vergence under natural conditions. II. Gaze shifts between real targets differing in distance and direction." Proceedings of the Royal Society of London. B. Biological Sciences 236, no. 1285 (1989): 441–65. http://dx.doi.org/10.1098/rspb.1989.0031.

Full text

Abstract:

Horizontal binocular eye movements of three subjects were recorded with the scleral sensor coil - revolving magnetic field technique during voluntary shifts of gaze between pairs of stationary, real, continuously visible targets. The target pairs were located either along the median plane (requiring symmetrical vergence), or on either side of the median plane (requiring asymmetrical vergence). Symmetrical vergence was primarily smooth, but it was often assisted by small, disjunctive saccades. Peak vergence speeds were very high; they increased from about 50° s -1 for vergence changes of 5° to

APA, Harvard, Vancouver, ISO, and other styles

28

Taylor, Peter A. "Off-Diagonal Heat Kernel Estimates for Symmetric Diffusions in a Degenerate Ergodic Environment." Potential Analysis, June 18, 2022. http://dx.doi.org/10.1007/s11118-022-10007-y.

Full text

Abstract:

AbstractWe study a symmetric diffusion process on $\mathbb {R}^{d}$ ℝ d , d ≥ 2, in divergence form in a stationary and ergodic random environment. The coefficients are assumed to be degenerate and unbounded but satisfy a moment condition. We derive upper off-diagonal estimates on the heat kernel of this process for general speed measure. Lower off-diagonal estimates are also shown for a natural choice of speed measure, under an additional mixing assumption on the environment. Using these estimates, a scaling limit for the Green function is proven.

APA, Harvard, Vancouver, ISO, and other styles

29

Tang, Wenwu, Yaoguo Li, Jianxin Liu, and Juzhi Deng. "Three dimensional controlled-source electromagnetic forward modeling by edge-based finite element with a divergence correction." GEOPHYSICS, August 4, 2021, 1–71. http://dx.doi.org/10.1190/geo2020-0520.1.

Full text

Abstract:

We present an edge-based finite element modeling algorithm with a divergence correction for calculating controlled-source electromagnetic (CSEM) responses of a 3D conductivity earth model. We solve a curl-curl equation to directly calculate the secondary electric field in order to eliminate the source singularity. The choice of the edge-based finite element method enables us to properly handle the discontinuity of the normal component of electric fields across conductivity boundaries. Although we can solve the resulting complex-symmetric linear system of equations efficiently by a quasi-minima

APA, Harvard, Vancouver, ISO, and other styles

30

Yang, Xiao-Dong, Wei Zhang, and Li-Qun Chen. "Transverse Vibrations and Stability of Axially Traveling Sandwich Beam With Soft Core." Journal of Vibration and Acoustics 135, no. 5 (2013). http://dx.doi.org/10.1115/1.4023951.

Full text

Abstract:

The transverse vibrations and stability of an axially moving sandwich beam are studied in this investigation. The face layers are assumed to be in the membrane state, which bears only axial loading but no bending. Only shear deformation is considered for the soft core layer. The governing partial equation is derived using Newton's second law and then transferred into a dimensionless form. The Galerkin method and the complex mode method are employed to study the natural frequencies. In comparison with the classical homogenous axially moving beam, the gyroscopic matrix is no longer skew-symmetri

APA, Harvard, Vancouver, ISO, and other styles

31

Nayak, Sridhara, and Tetsuya Takemi. "Structural characteristics of typhoons Jebi (2018), Faxai (2019), and Hagibis (2019)." Meteorology and Atmospheric Physics 135, no. 4 (2023). http://dx.doi.org/10.1007/s00703-023-00973-2.

Full text

Abstract:

AbstractIn recent years, Japan has experienced substantial damage from three intense typhoons: Jebi (2018), Faxai (2019), and Hagibis (2019). In this study, we provide a detailed description of the structure and synoptic environments of these typhoons, with particular focus on their frontal nature, temporal evolutions of the phase-space parameters, and the synoptic environments during their lifecycles. All three typhoons underwent phase changes at some point during their lifecycle before transitioning into extratropical cyclones. We found that their maximum intensities, as indicated by their m

APA, Harvard, Vancouver, ISO, and other styles

32

Gao, Dengliang. "Continental tapering of South America caused asymmetric non-uniform opening of the South Atlantic Ocean." Communications Earth & Environment 3, no. 1 (2022). http://dx.doi.org/10.1038/s43247-022-00587-3.

Full text

Abstract:

AbstractSouth Atlantic opening has been typically modelled as being related to symmetric and static thermal upwelling and seafloor spreading that drive divergent continental drift of South America and Africa. Comparative analyses, however, show that South Atlantic opening is asymmetric and non-uniform. For neither asymmetric nor non-uniform opening are the underlying mechanisms clear. Here I use geological and geophysical data to inform analytical modelling, revealing that westward drifting and southward tapering of the South American continent have controlled the asymmetry and the non-uniform

APA, Harvard, Vancouver, ISO, and other styles

33

Shapiro, Liza J., Noah T. Dunham, Allison McNamara, Jesse W. Young, and Tobin L. Hieronymus. "Assessing the Determinants of Platyrrhine Quadrupedal Gait Kinematics in an Ecological and Phylogenetic Framework." American Journal of Primatology 87, no. 2 (2025). https://doi.org/10.1002/ajp.70009.

Full text

Abstract:

ABSTRACTLaboratory studies have broadened our understanding of primate arboreal locomotor biomechanics and adaptation but are necessarily limited in species availability and substrate complexity. In this field study, we filmed the locomotion of 11 species of platyrrhines (Ecuador and Costa Rica; n = 1234 strides) and remotely measured substrate diameter and orientation. We then explored ecological and phylogenetic influences on quadrupedal kinematics in multivariate space using redundancy analysis combined with variation partitioning. Among all species, phylogenetic relatedness more strongly i

APA, Harvard, Vancouver, ISO, and other styles

34

Sattler, Nicholas J., and Michael Wehr. "Cortex-wide spatiotemporal motifs of theta oscillations are coupled to freely moving behavior." Frontiers in Systems Neuroscience 19 (June 19, 2025). https://doi.org/10.3389/fnsys.2025.1557096.

Full text

Abstract:

Multisensory information is combined across the cortex and assimilated into the continuous production of ongoing behavior. In the hippocampus, theta oscillations (4–12 Hz) radiate as large-scale traveling waves, and serve as a scaffold for neuronal ensembles of multisensory information involved in memory and movement-related processing. An extension of such an encoding framework across the neocortex could similarly serve to bind disparate multisensory signals into ongoing, coherent, phase-coded processes. Whether the neocortex exhibits unique large-scale traveling waves distinct from that of t

APA, Harvard, Vancouver, ISO, and other styles

35

Zhang, Jianshe, Ziqing Zhang, Xu Dong, Hang Yuan, Yanfeng Zhang, and Xingen Lu. "A robust Jacobian-free Newton–Krylov method for turbomachinery simulations." Physics of Fluids 36, no. 12 (2024). https://doi.org/10.1063/5.0243628.

Full text

Abstract:

Implicit methods are widely used in computational fluid dynamics numerical simulations of turbomachinery to accelerate convergence speed. However, simplified implicit nonlinear iterative algorithms, such as lower-upper symmetric-Gauss–Seidel method, will suffer from convergence slowdown or even divergence when dealing with off-design operations. In this study, a fast implicit Jacobian-Free Newton–Krylov finite volume method is developed to alleviate convergence difficulties of turbomachinery simulations. Based on the generalized minimal residual method, a matrix free solution for large sparse

APA, Harvard, Vancouver, ISO, and other styles

36

Wu, Chen-Hao, Ya-Peng Hu, and Hao Xu. "Hawking evaporation of Einstein–Gauss–Bonnet AdS black holes in $$D\geqslant 4$$ dimensions." European Physical Journal C 81, no. 4 (2021). http://dx.doi.org/10.1140/epjc/s10052-021-09140-6.

Full text

Abstract:

AbstractEinstein–Gauss–Bonnet theory is a string-generated gravity theory when approaching the low energy limit. By introducing the higher order curvature terms, this theory is supposed to help to solve the black hole singularity problem. In this work, we investigate the evaporation of the static spherically symmetric neutral AdS black holes in Einstein–Gauss–Bonnet gravity in various spacetime dimensions with both positive and negative coupling constant $$\alpha $$ α . By summarizing the asymptotic behavior of the evaporation process, we find the lifetime of the black holes is dimensional dep

APA, Harvard, Vancouver, ISO, and other styles

37

Ramasamy, Arun Prasad, Krishna Narendran, Anish Raj Anthony, Ilakkiya Selvaraj, and Subramanian Thanigaiarasu. "Elliptic supersonic jet control using C-D injections." Aircraft Engineering and Aerospace Technology, May 22, 2025. https://doi.org/10.1108/aeat-02-2025-0050.

Full text

Abstract:

Purpose This study aims to investigate the mixing and decay behaviour of a Mach 2 elliptic jet (aspect ratio 2) in an over-expanded state (nozzle pressure ratio 4), controlled by two convergent-divergent (C-D) injections at the nozzle exit. The objective is to evaluate the effectiveness of these injections, in two different configurations [injection along the major axis (IMA) and injection along the minor axis (IMI)], on jet mixing/decay, axis-switching and entrainment characteristics at three different injection pressure ratios (IPRs) of 4, 5 and 6. Design/methodology/approach Numerical simul

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!