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Parameter Estimation with Constraints Based on Variational Method
least squares estimation parameter estimation variational method constraint
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2011/9/9
The accuracy of parameter estimation is critical when digitally modeling a ship. A parameter estimation method with constraints was developed, based on the variational method. Performance functions an...
A Variational Technique for Extracting Directional Spectra from Multi-Component Wave Data
Variational Technique Multi-Component Wave Data Extracting Directional Spectra
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2009/2/13
The problem of extracting directional spectra from observed, multi-component wave data has two facets: 1) the observations provide information only on a finite number of integral properties of the wav...
Variational Assimilation of XBT Data. Part II. Sensitivity Studies and Use of Smoothing Constraints
Variational Assimilation XBT Data Smoothing Constraints
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2008/12/27
A linear reduced-gravity model of the tropical pacific is used to assimilate XBT data. The model cannot fit the data in the eastern equatorial Pacific for the whole assimilation period. Several experi...
Variational Assimilation of XBT Data. Part 1
variations method assimilate data gravity model tropical Pacific
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2008/12/27
A variations method based on the adjoint equation technique is used to assimilate data in a relatively simple linear reduced gravity model of the tropical Pacific. Real XBT data are used by identifyin...
Variational Estimation of the Wind Stress Drag Coefficient and the Oceanic Eddy Viscosity Profile
Variational Estimation Oceanic Eddy Viscosity Profile Wind Stress Drag Coefficient
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2008/12/23
A variational optimal control technique is used to assimilate both meteorological and oceanographic observations into an oceanic Ekman layer model. An identical twin experiment is discussed first in w...
Variational Assimilation of Geosat Data into an Eddy-resolving Model of the Gulf Stream Extension Area
Eddy-resolving Model Gulf Stream Extension Area Geosat Data sea surface height
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2008/12/18
A variational inverse technique is applied to assimilate sea surface height (SSH) measurements into a simple eddy-resolving quasigeostrophic ocean model. The data used were measured by Geosat in the s...
Variational Data Assimilation for Determining the Seasonal Net Surface Heat Flux Using a Tropical Pacific Ocean Model
sea surface temperature Tropical Pacific Ocean Model surface heat flux
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2008/12/12
The authors present a study for determining the seasonal net surface heat flux over the tropical Pacific Ocean using an adjoint technique. A simple tropical ocean model with thermodynamics is chosen a...
Variational Assimilation of Altimeter Data in a Multilayer Model of the Tropical Pacific Ocean
Multilayer Model Tropical Pacific Ocean Variational Assimilation Altimeter Data
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2008/11/18
A four-dimensional variational method is used to examine the extent to which a time sequence of altimeter measurements can determine the subsurface flow in a linear multilayer model of the tropical Pa...
Japan Sea Thermohaline Structure and Circulation. Part II: A Variational P-Vector Method
Japan Sea Thermohaline Structure Circulation P-Vector Method
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2008/7/31
The second part of this work investigates the seasonal variabilities of the Japan/East Sea (JES) circulation using the U.S. Navy Generalized Digital Environmental Model (GDEM) climatological temperatu...