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Journal articles on the topic 'Spatial simultaneous equations model'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Yang, Kai, and Lung-fei Lee. "Identification and estimation of spatial dynamic panel simultaneous equations models." Regional Science and Urban Economics 76 (May 2019): 32–46. http://dx.doi.org/10.1016/j.regsciurbeco.2018.07.010.

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Yang, Kai, and Lung-fei Lee. "Identification and QML estimation of multivariate and simultaneous equations spatial autoregressive models." Journal of Econometrics 196, no. 1 (2017): 196–214. http://dx.doi.org/10.1016/j.jeconom.2016.04.019.

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Balakrishna, Ramachandran, and Haris N. Koutsopoulos. "Incorporating within-Day Transitions in Simultaneous Offline Estimation of Dynamic Origin-Destination Flows without Assignment Matrices." Transportation Research Record: Journal of the Transportation Research Board 2085, no. 1 (2008): 31–38. http://dx.doi.org/10.3141/2085-04.

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An offline methodology is presented: it simultaneously estimates dynamic origin-destination (O-D) matrices, without using assignment matrices that incorporate within-day transition equations. The proposed formulation and solution approach extends a calibration method recently developed that directly uses the output of any network loading model (such as a dynamic traffic assignment or simulation model) so that the complex relationships between O-D flows and model outputs are accurately captured (as opposed to the more common method of approximate linear relationships based on the assignment mat

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Hailu, Yohannes G., and Cheryl Brown. "Regional Growth Impacts on Agricultural Land Development: A Spatial Model for Three States." Agricultural and Resource Economics Review 36, no. 1 (2007): 149–63. http://dx.doi.org/10.1017/s1068280500009503.

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In this study we attempt to understand the relationship between regional growth in population, employment, and per capita income, and farmland development in Maryland, Pennsylvania, and West Virginia. A spatial simultaneous equations model is estimated using county-level data. Results indicate that while county income growth and agricultural land value increases in neighboring counties increase the rate of farmland loss, growth in county agricultural land values, increases in agricultural land density in neighboring counties, and increases in agricultural income per farm reduce farmland losses

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Liu, Xiaodong, and Paulo Saraiva. "GMM estimation of spatial autoregressive models in a system of simultaneous equations with heteroskedasticity." Econometric Reviews 38, no. 4 (2017): 359–85. http://dx.doi.org/10.1080/07474938.2017.1308087.

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6

Caraballo, E., J. Little, M. Debiasi, and M. Samimy. "Development and Implementation of an Experimental-Based Reduced-Order Model for Feedback Control of Subsonic Cavity Flows." Journal of Fluids Engineering 129, no. 7 (2007): 813–24. http://dx.doi.org/10.1115/1.2742724.

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This work is focused on the development of a reduced-order model based on experimental data for the design of feedback control for subsonic cavity flows. The model is derived by applying the proper orthogonal decomposition (POD) in conjunction with the Galerkin projection of the Navier-Stokes equations onto the resulting spatial eigenfunctions. The experimental data consist of sets of 1000 simultaneous particle image velocimetry (PIV) images and surface pressure measurements taken in the Gas Dynamics and Turbulent Laboratory (GDTL) subsonic cavity flow facility at the Ohio State University. Mo

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Sattler, Derek F., and Valerie LeMay. "A system of nonlinear simultaneous equations for crown length and crown radius for the forest dynamics model SORTIE-ND." Canadian Journal of Forest Research 41, no. 8 (2011): 1567–76. http://dx.doi.org/10.1139/x11-078.

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A system of equations was developed to predict crown length (CL) and crown radius (CRAD) for trees in structurally complex stands. The equations address two problems that often arise in crown allometry. First, relationships between the main stem and the crown are likely to change with intertree competition. Therefore, explicit measures of density were used along with main stem measurements as explanatory variables. Second, the physiological relationship between CL and CRAD is often overlooked when modeling crowns. This relationship is incorporated through the use of a simultaneous system of eq

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Erofeev, Vladimir I., Sergey I. Gerasimov, and Alexey O. Malkhanov. "Nonlinear Spatial Localized Strain Waves." EPJ Web of Conferences 183 (2018): 02030. http://dx.doi.org/10.1051/epjconf/201818302030.

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A possible way of study of single waves in solids is discussed. The soliton is one of these waves without shape and parameters varying. Soliton deformation parameters are connected with the elastic moduli of the third order that allows defining values of these moduli by means of the measured solitondeformation parameters in various type waveguides made of the same material. The conditions under which a soliton can exist in a rod are analytically determined. For simultaneous excitation of loading in several wave guides two new energetic photosensitive structures (the mixtures are given) initiat

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ZHANG, L., K. H. LIU, Y. J. LOU, and Z. C. WANG. "Spatial dynamics of a nonlocal model with periodic delay and competition." European Journal of Applied Mathematics 31, no. 6 (2020): 1070–100. http://dx.doi.org/10.1017/s0956792519000408.

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Each species is subject to various biotic and abiotic factors during growth. This paper formulates a deterministic model with the consideration of various factors regulating population growth such as age-dependent birth and death rates, spatial movements, seasonal variations, intra-specific competition and time-varying maturation simultaneously. The model takes the form of two coupled reaction–diffusion equations with time-dependent delays, which bring novel challenges to the theoretical analysis. Then, the model is analysed when competition among immatures is neglected, in which situation one

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Shobe, Charles M., Gregory E. Tucker, and Katherine R. Barnhart. "The SPACE 1.0 model: a Landlab component for 2-D calculation of sediment transport, bedrock erosion, and landscape evolution." Geoscientific Model Development 10, no. 12 (2017): 4577–604. http://dx.doi.org/10.5194/gmd-10-4577-2017.

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Abstract. Models of landscape evolution by river erosion are often either transport-limited (sediment is always available but may or may not be transportable) or detachment-limited (sediment must be detached from the bed but is then always transportable). While several models incorporate elements of, or transition between, transport-limited and detachment-limited behavior, most require that either sediment or bedrock, but not both, are eroded at any given time. Modeling landscape evolution over large spatial and temporal scales requires a model that can (1) transition freely between transport-

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11

Noiray, Nicolas, and Bruno Schuermans. "On the dynamic nature of azimuthal thermoacoustic modes in annular gas turbine combustion chambers." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 469, no. 2151 (2013): 20120535. http://dx.doi.org/10.1098/rspa.2012.0535.

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This paper deals with the dynamics of standing and rotating azimuthal thermoacoustic modes in annular combustion chambers. Simultaneous acoustic measurements have been made at multiple circumferential positions in an annular gas turbine combustion chamber. A detailed statistical analysis of the spatial Fourier amplitudes extracted from these data reveals that the acoustic modes are continuously switching between standing, clockwise and counter-clockwise travelling waves. A theoretical framework from which the modal dynamics can be explained is proposed and supported by real gas turbine data. T

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Wang, Enjiang, Jing Ba, and Yang Liu. "Time-space-domain implicit finite-difference methods for modeling acoustic wave equations." GEOPHYSICS 83, no. 4 (2018): T175—T193. http://dx.doi.org/10.1190/geo2017-0546.1.

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It has been proved that the implicit spatial finite-difference (FD) method can obtain higher accuracy than explicit FD by using an even smaller operator length. However, when only second-order FD in time is used, the combined FD scheme is prone to temporal dispersion and easily becomes unstable when a relatively large time step is used. The time-space domain FD can suppress the temporal dispersion. However, because the spatial derivatives are solved explicitly, the method suffers from spatial dispersion and a large spatial operator length has to be adopted. We have developed two effective time

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Zamytskyi, O. V., N. O. Holiver, N. V. Bondar, and S. O. Kradozhon. "Mathematical model of the process of drying fine dispersed materials under the influence of alternating electric current." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 3 (2021): 51–56. http://dx.doi.org/10.33271/nvngu/2021-3/051.

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Purpose. Establishing the dependences and determining rational parameters of the process of drying fine materials by direct influence of an electric current. Methodology. In the work, theoretical, analytical, empirical, and experimental methods as well as methods of mathematical statistics are used. Mathematical modeling of the process occurring during drying of finely dispersed materials by direct influence of alternating current is carried out. Findings. As a result of the research on the basis of physical representations of the process of drying capillary-porous material, a mathematical mod

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14

Wang, Tao, Xin Min Yao, and Xiu Yue Yang. "Study on Method to Achieve Position of Amphibious Vehicle Navigating on Water." Applied Mechanics and Materials 299 (February 2013): 12–15. http://dx.doi.org/10.4028/www.scientific.net/amm.299.12.

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To simulate flow field around amphibious vehicle, vehicle position of amphibious vehicle is an important boundary condition that used to be determined by prior experimental data. In order to compute vehicle position and flow field simultaneously, the simulation is solved based on Arbitrary Lagrangian-Eulerian approach that can solve interaction between vehicle and water. Rigid body spatial motion equations and flow governing equations are integrated to establish a mathematical model of amphibious vehicles navigating on water. Differential equations are solved by finite volume method. Dynamic d

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Dieterich, J. H. "Earthquake simulations with time-dependent nucleation and long-range interactions." Nonlinear Processes in Geophysics 2, no. 3/4 (1995): 109–20. http://dx.doi.org/10.5194/npg-2-109-1995.

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Abstract. A model for rapid simulation of earthquake sequences is introduced which incorporates long-range elastic interactions among fault elements and time-dependent earthquake nucleation inferred from experimentally derived rate- and state-dependent fault constitutive properties. The model consists of a planar two-dimensional fault surface which is periodic in both the x- and y-directions. Elastic interactions among fault elements are represented by an array of elastic dislocations. Approximate solutions for earthquake nucleation and dynamics of earthquake slip are introduced which permit c

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16

Boasson, Vigdis, and Emil Boasson. "Firm value, spatial knowledge flow, and innovation: evidence from patent citations." China Finance Review International 5, no. 2 (2015): 132–60. http://dx.doi.org/10.1108/cfri-08-2014-0056.

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Purpose – The purpose of this paper is to examine the role of geographic location of research-intensive firms in the ability to generate new research and products, which consequently affects firm value. Design/methodology/approach – The authors conduct the empirical study following a three-step process. First, if pharmaceutical firms are more likely to cite the patents of other firms and other innovators that are nearby, as opposed to firms and other innovators that are far away, then location (i.e. close proximity) is likely important when it comes to the ability to learn and to use the knowl

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17

Metzger, Stefan. "On convergent schemes for two-phase flow of dilute polymeric solutions." ESAIM: Mathematical Modelling and Numerical Analysis 52, no. 6 (2018): 2357–408. http://dx.doi.org/10.1051/m2an/2018042.

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We construct a Galerkin finite element method for the numerical approximation of weak solutions to a recent micro-macro bead-spring model for two-phase flow of dilute polymeric solutions derived by methods from nonequilibrium thermodynamics ([Grün, Metzger, M3AS 26 (2016) 823–866]). The model consists of Cahn-Hilliard type equations describing the evolution of the fluids and the unsteady incompressible Navier-Stokes equations in a bounded domain in two or three spatial dimensions for the velocity and the pressure of the fluids with an elastic extra-stress tensor on the right-hand side in the m

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18

Hansen, A. C., and X. Cui. "Analysis and Observations of Wind Turbine Yaw Dynamics." Journal of Solar Energy Engineering 111, no. 4 (1989): 367–71. http://dx.doi.org/10.1115/1.3268336.

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Two models of the yaw behavior of horizontal axis wind turbines are presented and discussed. Emphasis in this paper is on the description of the models and underlying assumptions with details of the equations and solution methods referenced in technical reports. The more complex model (YawDyn) considers the coupling of blade flap motions and yaw motions which result from temporal and spatial variations in the approaching wind speed. The new methods are unique in that they simultaneously model the effects of skewed wake aerodynamics and blade stall. Both of these effects must be considered if y

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19

Han, Renji, and Binxiang Dai. "Cross-Diffusion Induced Turing Instability and Amplitude Equation for a Toxic-Phytoplankton–Zooplankton Model with Nonmonotonic Functional Response." International Journal of Bifurcation and Chaos 27, no. 06 (2017): 1750088. http://dx.doi.org/10.1142/s0218127417500882.

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The spatiotemporal pattern induced by cross-diffusion of a toxic-phytoplankton–zooplankton model with nonmonotonic functional response is investigated in this paper. The linear stability analysis shows that cross-diffusion is the key mechanism for the formation of spatial patterns. By taking cross-diffusion rate as bifurcation parameter, we derive amplitude equations near the Turing bifurcation point for the excited modes in the framework of a weakly nonlinear theory, and the stability analysis of the amplitude equations interprets the structural transitions and stability of various forms of T

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20

Nzokou, François, Brian Morse, Jean-Loup Robert, Martin Richard, and Edmond Tossou. "Numerical characteristics of a coupled river ice and hydrodynamic model." Canadian Journal of Civil Engineering 38, no. 4 (2011): 393–403. http://dx.doi.org/10.1139/l11-009.

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Prediction of dam break surges using numerical tools has been the subject of tremendous research efforts in the past four decades. Powerful numerical tools that can model surge phenomena are readily available on the market. However, for winter conditions, when a river is covered by ice, it becomes difficult or even impossible to predict wave propagation dynamics using these traditional tools. It is therefore important to know what will happen should a dam break or an ice jam release in an ice-covered river. In this study, fully conservative form of the one-dimensional St. Venant equations are

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21

Valley, M. T., M. G. Moore, J. Zhuang, et al. "Separation of hemodynamic signals from GCaMP fluorescence measured with wide-field imaging." Journal of Neurophysiology 123, no. 1 (2020): 356–66. http://dx.doi.org/10.1152/jn.00304.2019.

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Wide-field calcium imaging is often used to measure brain dynamics in behaving mice. With a large field of view and a high sampling rate, wide-field imaging can monitor activity from several distant cortical areas simultaneously, revealing cortical interactions. Interpretation of wide-field images is complicated, however, by the absorption of light by hemoglobin, which can substantially affect the measured fluorescence. One approach to separating hemodynamics and calcium signals is to use multiwavelength backscatter recordings to measure light absorption by hemoglobin. Following this approach,

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22

Zhang, Jiayu, Ping Huang, Fei Liu, and Shijie Zhou. "Mechanism for the Spatial Pattern of the Amplitude Changes in Tropical Intraseasonal and Interannual Variability under Global Warming." Journal of Climate 34, no. 11 (2021): 4495–504. http://dx.doi.org/10.1175/jcli-d-20-0885.1.

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AbstractThis study investigates what forms the spatial pattern of the amplitude changes in tropical intraseasonal and interannual variability—represented by the two most important variables, precipitation (ΔP′) and circulation (Δω′)—under global warming, based on 24 models from the phase 5 of the Coupled Model Intercomparison Project (CMIP5). Diagnostic analyses reveal that the moisture budget and thermodynamic energy equations related to the ΔP′ and Δω′ proposed separately in previous studies are simultaneously tenable. As a result, we investigate the mechanism for the spatial pattern of Δω′

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23

Ngugi, H. K., S. B. King, J. Holt, and A. M. Julian. "Simultaneous Temporal Progress of Sorghum Anthracnose and Leaf Blight in Crop Mixtures with Disparate Patterns." Phytopathology® 91, no. 8 (2001): 720–29. http://dx.doi.org/10.1094/phyto.2001.91.8.720.

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Field studies were conducted at Alupe in western Kenya in 1995 and 1996 to evaluate the efficacy of crop and species mixtures for the management of sorghum anthracnose (caused by Colletotrichum sublineolum) and leaf blight (caused by Exserohilum turcicum). The progress of these diseases developing simultaneously on a susceptible sorghum cultivar planted in inter- or intra-row mixtures of varying proportions with either maize or resistant sorghum was monitored. The effects of host type and mixture patterns on disease progress were compared by parameter estimates derived from fitted Lotka-Volter

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24

Amundsen, Lasse, Fredrik Andersson, Dirk-Jan van Manen, Johan O. A. Robertsson, and Kurt Eggenberger. "Multisource encoding and decoding using the signal apparition technique." GEOPHYSICS 83, no. 1 (2018): V49—V59. http://dx.doi.org/10.1190/geo2017-0206.1.

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Signal apparition is a method for encoding sources in simultaneous multisource seismic acquisition and decoding the multisource response of the earth into its single-source responses. For [Formula: see text] sources, encoding is performed by applying periodic sequences of period [Formula: see text] to each of the sources along source lines. Decoding is achieved in the wavenumber domain for each frequency by solving an [Formula: see text] linear system of equations. The system’s matrix is the product of a Fourier matrix and an encoding matrix, the latter containing the information of the codes.

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Song, Haiming, Xiaoshen Wang, Kai Zhang, and Qi Zhang. "Primal-Dual Active Set Method for American Lookback Put Option Pricing." East Asian Journal on Applied Mathematics 7, no. 3 (2017): 603–14. http://dx.doi.org/10.4208/eajam.060317.020617a.

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AbstractThe pricing model for American lookback options can be characterised as a two-dimensional free boundary problem. The main challenge in this problem is the free boundary, which is also the main concern for financial investors. We use a standard technique to reduce the pricing model to a one-dimensional linear complementarity problem on a bounded domain and obtain a corresponding variational inequality. The inequality is discretised by finite differences and finite elements in the temporal and spatial directions, respectively. By enforcing inequality constraints related to the options us

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Al-Barwani, H. H., M. Al-Lawatia, E. Balakrishnan, and A. Purnama. "Modeling Flow and Transport in Unsaturated Porous Media: A Review." Sultan Qaboos University Journal for Science [SQUJS] 5 (December 1, 2000): 265. http://dx.doi.org/10.24200/squjs.vol5iss0pp265-280.

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Underground water is a vital natural resource and every effort should be made to understand ways and means of efficiently using and managing it. The unsaturated zone, bounded at its top by the land surface and below by the water table, is the region through which water, together with pollutant carried by the water, infiltrates to reach the groundwater. Therefore, various processes occurring within the unsaturated zone play a major role in determining both the quality and quantity of water recharging into the groundwater. Classical methods of predicting water flow and contaminant transport proc

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27

Vyazmin, V. S., and Yu V. Bolotin. "Two-dimensional Kalman filter approach to airborne vector gravimetry." Journal of Geodetic Science 9, no. 1 (2019): 87–96. http://dx.doi.org/10.1515/jogs-2019-0009.

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Abstract The paper presents a new approach to the airborne vector gravimetry problem. The idea of the approach is to take into account spatial correlation of the gravity field to improve observability of horizontal components of the gravity disturbance vector (GDV). We consider the GDV determination problem given airborne data at a set of parallel survey lines assuming that lines are flown in the same direction at a constant height above the reference ellipsoid. We use a 2-D random field model for the gravity field at the flight height. The random field is governed by two autoregressive equati

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28

Wulfmeyer, Volker, Shravan Kumar Muppa, Andreas Behrendt, et al. "Determination of Convective Boundary Layer Entrainment Fluxes, Dissipation Rates, and the Molecular Destruction of Variances: Theoretical Description and a Strategy for Its Confirmation with a Novel Lidar System Synergy." Journal of the Atmospheric Sciences 73, no. 2 (2016): 667–92. http://dx.doi.org/10.1175/jas-d-14-0392.1.

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Abstract Atmospheric variables in the convective boundary layer (CBL), which are critical for turbulence parameterizations in weather and climate models, are assessed. These include entrainment fluxes, higher-order moments of humidity, potential temperature, and vertical wind, as well as dissipation rates. Theoretical relationships between the integral scales, gradients, and higher-order moments of atmospheric variables, fluxes, and dissipation rates are developed mainly focusing on the entrainment layer (EL) at the top of the CBL. These equations form the starting point for tests of and new a

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Bürger, Raimund, Julio Careaga, and Stefan Diehl. "A method-of-lines formulation for a model of reactive settling in tanks with varying cross-sectional area." IMA Journal of Applied Mathematics 86, no. 3 (2021): 514–46. http://dx.doi.org/10.1093/imamat/hxab012.

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Abstract Reactive settling denotes the process of sedimentation of small solid particles dispersed in a viscous fluid with simultaneous reactions between the components that constitute the solid and liquid phases. This process is of particular importance for the simulation and control of secondary settling tanks (SSTs) in water resource recovery facilities (WRRFs), formerly known as wastewater treatment plants. A spatially 1D model of reactive settling in an SST is formulated by combining a mechanistic model of sedimentation with compression with a model of biokinetic reactions. In addition, t

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Rakisheva, D. S., B. G. Mukanova, and I. N. Modin. "SIMULATION OF ELECTRICAL MONITORING OF DAMS WITH LEAKAGE WITH A TRANSVERSE PLACEMENT OF THE MEASURING INSTALLATION." EURASIAN JOURNAL OF MATHEMATICAL AND COMPUTER APPLICATIONS 8, no. 4 (2020): 69–82. http://dx.doi.org/10.32523/2306-6172-2020-8-4-69-82.

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Numerical modeling of the problem of dam monitoring by the Electrical Resistivity Tomography method is carried out. The mathematical model is based on integral equations with a partial Fourier transform with respect to one spatial variable. It is assumed that the measurement line is located across the dam longitude. To approximate the shape of the dam surface, the Radial Basic Functions method is applied. The influence of locations of the water-dam, dam-basement, basement-leakage boundaries with respect to the sounding installation, which is partially placed under the headwater, is studied. Nu

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Murawski, Steven A., John H. Steele, Phillip Taylor, et al. "Why compare marine ecosystems?" ICES Journal of Marine Science 67, no. 1 (2009): 1–9. http://dx.doi.org/10.1093/icesjms/fsp221.

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Abstract Murawski, S. A., Steele, J. H., Taylor, P., Fogarty, M. J., Sissenwine, M. P., Ford, M., and Suchman, C. 2010. Why compare marine ecosystems? – ICES Journal of Marine Science, 67: 1–9. Effective marine ecosystem-based management (EBM) requires understanding the key processes and relationships controlling the aspects of biodiversity, productivity, and resilience to perturbations. Unfortunately, the scales, complexity, and non-linear dynamics that characterize marine ecosystems often confound managing for these properties. Nevertheless, scientifically derived decision-support tools (DST

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Rudd, Michael E. "Neurocomputational Lightness Model Explains the Appearance of Real Surfaces Viewed Under Gelb Illumination." Journal of Perceptual Imaging 3, no. 1 (2020): 10502–1. http://dx.doi.org/10.2352/j.percept.imaging.2020.3.1.010502.

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Abstract One of the primary functions of visual perception is to represent, estimate, and evaluate the properties of material surfaces in the visual environment. One such property is surface color, which can convey important information about ecologically relevant object characteristics such as the ripeness of fruit and the emotional reactions of humans in social interactions. This paper further develops and applies a neural model (Rudd, 2013, 2017) of how the human visual system represents the light/dark dimension of color—known as lightness—and computes the colors of achromatic material surf

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Lu, Fang-Wu, Quan-Gui Gao, Bo-Tao Zhu, and Li Zhang. "High energy spatially radiative properties of Vela X pulsar wind nebula." Astronomy & Astrophysics 624 (April 2019): A144. http://dx.doi.org/10.1051/0004-6361/201834320.

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Context. Vela X is a middle-aged pulsar wind nebula (PWN) that has been detected in radio, X-ray, and γ-ray bands. The observations indicate that that photon index and flux density of the inner regions of the nebula have obvious changes as the radial distance increases in the X-ray band, and the surface brightness has been discovered to decrease with the increase of radial distance in γ-ray band. Aims. The multi-band photon emission and high energy spatially radiative properties of Vela X are investigated in the framework of a spatially dependent particle transport model. Methods. Electron dis

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Pradhan, Jitenjaya, Amit, Bikash Mahato, Satish D. Dhandole, and Yogesh G. Bhumkar. "Construction, Analysis and Application of Coupled Compact Difference Scheme in Computational Acoustics and Fluid Flow Problems." Communications in Computational Physics 18, no. 4 (2015): 957–84. http://dx.doi.org/10.4208/cicp.101214.250515s.

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AbstractIn the present work, a new type of coupled compact difference scheme has been proposed for the solution of computational acoustics and flow problems. The proposed scheme evaluates the first, the second and the fourth derivative terms simultaneously. Derived compact difference scheme has a significant spectral resolution and a physical dispersion relation preserving (DRP) ability over a considerable wavenumber range when a fourth order four stage Runge-Kutta scheme is used for the time integration. Central stencil has been used for the present numerical scheme to evaluate spatial deriva

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Tang, Hansong, Charles Reid Nichols, Lynn Donelson Wright, and Donald Resio. "Modeling Multiscale and Multiphysics Coastal Ocean Processes: A Discussion on Necessity, Status, and Advances." Journal of Marine Science and Engineering 9, no. 8 (2021): 847. http://dx.doi.org/10.3390/jmse9080847.

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Coastal ocean flows are interconnected by a complex suite of processes. Examples are inlet jets, river mouth effluents, ocean currents, surface gravity waves, internal waves, wave overtopping, and wave slamming on coastal structures. It has become necessary to simulate such oceanographic phenomena directly and simultaneously in many disciplines, including coastal engineering, environmental science, and marine science. Oceanographic processes exhibit distinct behaviors at specific temporal and spatial scales, and they are multiscale, multiphysics in nature; these processes are described by diff

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Li, Guozhi, Fuhai Zhang, Yili Fu, and Shuguo Wang. "Kinematic calibration of serial robot using dual quaternions." Industrial Robot: the international journal of robotics research and application 46, no. 2 (2019): 247–58. http://dx.doi.org/10.1108/ir-10-2018-0221.

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Purpose The purpose of this paper is to propose an error model for serial robot kinematic calibration based on dual quaternions. Design/methodology/approach The dual quaternions are the combination of dual-number theory and quaternion algebra, which means that they can represent spatial transformation. The dual quaternions can represent the screw displacement in a compact and efficient way, so that they are used for the kinematic analysis of serial robot. The error model proposed in this paper is derived from the forward kinematic equations via using dual quaternion algebra. The full pose meas

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Spanos, Aris. "The simultaneous-equations model revisited." Journal of Econometrics 44, no. 1-2 (1990): 87–105. http://dx.doi.org/10.1016/0304-4076(90)90074-4.

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Themistocleous, K., A. Agapiou, B. Cuca, and D. G. Hadjimitsis. "Unmanned Aerial Systems and Spectroscopy for Remote Sensing Applications in Archaeology." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-7/W3 (April 30, 2015): 1419–23. http://dx.doi.org/10.5194/isprsarchives-xl-7-w3-1419-2015.

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Remote sensing has open up new dimensions in archaeological research. Although there has been significant progress in increasing the resolution of space/aerial sensors and image processing, the detection of the crop (and soil marks) formations, which relate to buried archaeological remains, are difficult to detect since these marks may not be visible in the images if observed over different period or at different spatial/spectral resolution. In order to support the improvement of earth observation remote sensing technologies specifically targeting archaeological research, a better understandin

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Druett, M. K., and V. V. Zharkova. "HYDRO2GEN: Non-thermal hydrogen Balmer and Paschen emission in solar flares generated by electron beams." Astronomy & Astrophysics 610 (February 2018): A68. http://dx.doi.org/10.1051/0004-6361/201731053.

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Aim. Sharp rises of hard X-ray (HXR) emission accompanied by Hα line profiles with strong red-shifts up to 4 Å from the central wavelength, often observed at the onset of flares with the Specola Solare Ticinese Telescope (STT) and the Swedish Solar Telescope (SST), are not fully explained by existing radiative models. Moreover, observations of white light (WL) and Balmer continuum emission with the Interface Region Imaging Spectrograph (IRISH) reveal strong co-temporal enhancements and are often nearly co-spatial with HXR emission. These effects indicate a fast effective source of excitation a

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Heckman, James J., and Thomas E. Macurdy. "A Simultaneous Equations Linear Probability Model." Canadian Journal of Economics 18, no. 1 (1985): 28. http://dx.doi.org/10.2307/135111.

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Hsiao, Cheng. "Cointegration and Dynamic Simultaneous Equations Model." Econometrica 65, no. 3 (1997): 647. http://dx.doi.org/10.2307/2171757.

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Olenjuk, Yu. "REPRESENTATION OF IRREGULAR SURFACES WITH THE HELP OF EQUIDISTANT LINES." Bulletin of Lviv State University of Life Safety, no. 18 (December 31, 2018): 57–60. http://dx.doi.org/10.32447/20784643.18.2018.05.

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Introduction. It must be proposed the method of geometric modeling surfaces тo represent and design non-regular surface surfaces. Purpose of the research is to offer a model of the reflection of irregular surfaces, which would contribute to making adjustments during the design. The aim The listed components of the problem must be solved simultaneously during the design process. It is necessary to propose a method that simultaneously takes into account several characteristics, for example, strength, aerodynamics, manufacturing simplicity, etc. Scientific novelty. We used following e

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Tang, Chao, Xiaofan Chen, Zhimin Du, Ping Yue, and Jiabao Wei. "Numerical Simulation Study on Seepage Theory of a Multi-Section Fractured Horizontal Well in Shale Gas Reservoirs Based on Multi-Scale Flow Mechanisms." Energies 11, no. 9 (2018): 2329. http://dx.doi.org/10.3390/en11092329.

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Aimed at the multi-scale fractures for stimulated reservoir volume (SRV)-fractured horizontal wells in shale gas reservoirs, a mathematical model of unsteady seepage is established, which considers the characteristics of a dual media of matrix and natural fractures as well as flow in the large-scale hydraulic fractures, based on a discrete-fracture model. Multi-scale flow mechanisms, such as gas desorption, the Klinkenberg effect, and gas diffusion are taken into consideration. A three-dimensional numerical model based on the finite volume method is established, which includes the construction

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Keerativibool, Warangkhana, Jirawan Jitthavech, and Vichit Lorchirachoonkul. "Model Selection in a System of Simultaneous Equations Model." Communications in Statistics - Theory and Methods 40, no. 3 (2011): 373–93. http://dx.doi.org/10.1080/03610920903353717.

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Golebiowski, Jerzy, and Robert Piotr Bycul. "Parallel analysis of thermal field in a layered DC cable part I." International Journal of Numerical Methods for Heat & Fluid Flow 24, no. 1 (2013): 58–72. http://dx.doi.org/10.1108/hff-02-2012-0044.

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Purpose – The paper aims to propose a parallel algorithm in order to increase speed and efficiency of an analysis of transient thermal field in layered DC cables. Design/methodology/approach – Initial-boundary problem of thermal field was discretized by means of implicit finite difference method in cylindrical coordinates. A two-stage time decomposition method was applied to introduce parallel computations. An assumed duration of the transient state was decomposed. The system of algebraic equations was being solved with the use of a conjugate gradient method (with diagonal preconditioning) in

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Barbosa, F. I., E. L. Zaparoli, and C. R. Andrade. "Unified approach for conjugate heat-transfer analysis of high speed air flow through a water-cooled nozzle." Aeronautical Journal 120, no. 1224 (2016): 355–73. http://dx.doi.org/10.1017/aer.2015.15.

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ABSTRACTThis article presents a unified approach to solve steady-state conjugate heat-transfer problem including simultaneously gas, liquid and solid regions in just one 3D domain, distinguished by their particular properties. This approach reduces approximation errors and the time to solve the problem, which characterise iterative methods based on separated domains. The formulation employs RANS equations, realisablek-ε turbulence model and near-wall treatment model. A commercial CFD code solves the pressure-based segregated algorithm combined with spatial discretisation of second order upwind

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Farebrother, R. W. "Unbiased Prediction in a Simple Simultaneous Equations Model." Econometric Theory 6, no. 2 (1990): 288–89. http://dx.doi.org/10.1017/s0266466600005223.

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Holly, Alberto. "Results for a Simple Triangular Simultaneous Equations Model." Econometric Theory 6, no. 2 (1990): 289–90. http://dx.doi.org/10.1017/s0266466600005235.

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Farebrother, R. W. "Unbiased Prediction in a Simple Simultaneous Equations Model." Econometric Theory 5, no. 2 (1989): 320. http://dx.doi.org/10.1017/s0266466600012469.

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Holly, Alberto. "Results for a Simple Triangular Simultaneous Equations Model." Econometric Theory 5, no. 2 (1989): 320–21. http://dx.doi.org/10.1017/s0266466600012470.

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