Variability and sensitivity of coupled mix layer-acoustic model systems

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SeriesNPS-68-81-002 (series)
ContributionsDunlap, Calvin R., Garwood, Roland W.
The Physical Object
Paginationp. ;
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Open LibraryOL25502336M

NPS NAVALPOSTGRADOATESCHOOL Monterey,California THESIS VariabilityandSensitivity of CoupledMixedLayer-AcousticModelS}^^steins by March TheISisAdvisors: Calvir R.W. Garwood,Jr. Approvedforpublicrelease,distributionunlimited Preparedfor: NavalOceanSystemsCenter.

Sensitivity analysis methods applicable to the eigenmodes and frequency responses of coupled acoustic-structural systems are proposed for the purpose of reducing vehicle interior noise.

The ongoing effort of the Intergovernmental Panel on Climate Change (IPCC; Houghton et al. ) reflects the history and development of the application of coupled atmosphere–ocean-sea ice general circulation models (AOGCMs) for climate IPCC reports also document, however, the diversity of models and the dependence of the findings on the respective models and their Cited by:   A recent intercomparison study by Van Oldenborgh et al.

() of 20 IPCC AR4 models has confirmed that the ECHAM5/MPI-OM coupled model produces relatively realistic ENSO variability. Given the ocean’s coarse meridional resolution in the Tropics, these results support the idea that the atmosphere plays a dominant role in determining important Cited by:   Many CGCMs suffer from serious biases in the tropical Atlantic (Davey et al.

Details Variability and sensitivity of coupled mix layer-acoustic model systems FB2

).In particular, as shown in Fig. 1, almost all Coupled Model Intercomparison Project phase 3 (CMIP3) (Meehl et al. ) models show the zonal SST gradient along the equator opposite to the observation (Richter and Xie ).Lack of the cold tongue in the equatorial Atlantic may be the major reason why Cited by:   In the paper, a generalized essential boundary condition sensitivity analysis based implementation of $$\text {FE}^2$$ and mesh-in-element (MIEL) multi-scale methods is derived as an alternative to standard implementations of multi-scale analysis, where the calculation of Schur complement of the microscopic tangent matrix is needed for bridging the scales.

Current structural/acoustic sensitivity algorithms assume deterministic system design parameters and therefore predict changes in the deterministic response of the system. Due to variability associated with manufacturing tolerances most structural/acoustic systems consist of random and deterministic structural design parameters and therefore.

Sensitivity and uncertainty analysis coupled with automatic calibration for a distributed watershed model. Based on a detailed spatial sensitivity and model feasibility analysis is applied to identify parameters of SWAT model that contribute most to the variability of streamflow and sediment yield, and thus, those that should be calibrated.

We first construct a linear coupled model of the tropical Atlantic ocean–atmosphere in section 2, then seek the physical modes through a linear eigenanalysis in section 3, and further investigate the sensitivity of the leading modes to changes in the relative strength of thermodynamical and dynamical feedbacks in section 4.

Printed in Great Britain /96 $ + PII: S(97)X Interannuality and CO2 Sensitivity of the SECHIBA-BGC Coupled SVAT-BGC Model N. Viovy LMCE, Laboratoire de Mod~lisation du Climat et de l'Environnement, Commissariat ~ l'Energie Atomique, CE Saclay, BatOrme des Merisiers, Gif-sur-Yvette Cedex, France.

Sensitivity analysis of coupled structural–acoustic systems subjected to stochastic excitation 21 October | Structural and Multidisciplinary Optimization, Vol. 39, No. 1 Sensitivity Analysis and Optimization Using Energy Finite Element and Boundary Element Methods. In this study, a coupled physical-biogeochemical (ROMS-PISCES) model has been configured and run to emulate the surface carbonate system parameters (DIC, TALK, pCO 2, and pH) for the Bay of Bengal region.

Model skill assessment analysis has been performed using available observational data-sets. Modal analysis of coupled acoustic-structural systems leads to unsymmetric eigenproblem of special form which introduce different left and right eigenvectors.

In this paper, the relation between left and right eigenvectors is first established by symmetrization of the unsymmetric eigensystem, and then Nelson’s method is extended to coupled.

Abstract: We present here and in the companion paper (Part II) a general framework for the modeling of semiconductor device variability through the physics-based analysis of the small-change sensitivity.

We consider a very general class of dynamic device operation, i.e., the periodic or quasi-periodic large signal (LS) time-varying regime, and we evaluate the sensitivity of both dc and. A development for computing the acoustic pressure spectral density and its sensitivity of coupled structural–acoustic systems subjected to stochastic excitation is presented.

Previous work in the area of structural–acoustic response considered systems subject to deterministic excitations. The response computation depends on the excitation; therefore, new methods are developed to account.

A coupled physical-biogeochemical model was used to explore the primary physical factors determining the chl-a variability on the shelf. Model sensitivity studies identified wind mixing, net heat flux, and river discharge as the dominant factors influencing the MAB water column stability and consequent phytoplankton growth.

The top panel of Fig. 1 shows that the coupled model with a low-resolution atmosphere exhibits a marked peak of variability around 2 yr (Guilyardi et al. ) and comparatively small variability everywhere else. The coupled model with the high-resolution atmosphere shifts the major variability peaks toward longer time scales.

In this study, we use a coupled atmosphere–ocean general circulation model (CGCM) MIROC version (K-1 Model Developers, ), and an earth system model of intermediate complexity LOVECLIM (Goosse et al.,Menviel et al., ).

Because this CGCM predicts climate and ocean fields without marine carbon cycle, we additionally employ an. The sensitivity (or resilience) of river systems to change is a complex and poorly understood topic (Allison and Thomas, ), and very few significant advances have been made since the seminal paper by Brunsden and Thornes, the book Landscape Sensitivity edited by Thomas and Allison and the special issue of Catena (, volume 42).

A search. The symmetrical Eulerian formulation is applied in order to calculate the coupled frequencies and modes. From a state space formulation of the problem a sensitivity algorithm is developed to obtain the derivatives of the coupled frequencies and modes of the system versus a design parameter vector.

The analysis of acoustic radiation and scattering from submerged elastic structures is an important and challenging problem. Often, numerical solutions are hampered by the fact that the acoustic pressure field can be very sensitive to structural detail.

In this paper, a procedure for obtaining the sensitivity of a structural-acoustic system to structural perturbations is presented. 1. Introduction [2] Changes in desert area impact the human living in those areas substantially and can impact the surface albedo and feedback onto climate.

In addition, the changes in desert area may lead to changes in desert dust source generation, which has important implications for biogeochemistry and climate [e.g., Martin, ; Miller and Tegen, ].

selectivity, accuracy, precision, sensitivity, reproducibility, and stability. o An operational description of the analytical method The OPM ICP-OES Operation Model Optima DV is an operational description of the analytical method.

o Evidence of purity and. Acoustic-structural sensitivity analysis for coupled acoustic-structural systems can be conveniently and quickly used in dynamic modifications of car body panels to reduce interior sound pressure level.

In practice, car body panels are multilayered structure which consists of the outside skin, the i.

Download Variability and sensitivity of coupled mix layer-acoustic model systems FB2

Climate Sensitivity: Sensitivity is the degree to which a system is affected, either adversely or beneficially, by climate-related stimuli. Climate-related stimuli encompass all the elements of climate change, including mean climate characteristics, climate variability, and the frequency and magnitude of.

design sensitivity formulation for structural systems using EFEM, but the structural-acoustic relationship has not been addressed. This paper presents a discussion on the structural-acoustic relationship in EFEM and a detailed derivation of the parametric sensitivity formulation for the structural-acoustic coupled problem.

Modeling is an important means of understanding the physical structure of the coupled climate system and assessing its predictability. Modeling serves as a means of synthesizing the long-term observations, process studies, and empirical and diagnostic studies of GOALS and focusing them on the program's central objective—the development of skillful prediction of seasonal-to-interannual.

Abstract: Short and long-term power system planning models are becoming more complex in order to capture current and future market characteristics comprising more variability, uncertainty, and integration of geographically spread market areas.

Dimension reduction methods can be used to keep the planning models tractable, e.g. time series sampling and clustering, but they represent a trade-off.

In this paper the sensitivity of the adopted acoustic model is analyzed with respect to these two variables, that is considering how the values of the terms "weather conditions" and "traffic condi-tions" influence the environmental noise level or the noise level emitted by the source.

Sensitivity analysis with respect to meteorological. In this study, we analyze the dynamics of multi-year long droughts over the western and central Mediterranean region for the period of – AD using the Community Earth System model version.

The eukaryotic genome is organized into nucleosomes, the fundamental units of chromatin. The positions of nucleosomes on DNA regulate protein-DNA interactions and in turn influence DNA-templated events. Despite the increasing number of genome-wide maps of nucleosome position, how global changes in gene expression relate to changes in nucleosome position is poorly understood.NRL REVIEW ACOUSTICS Environmental Acoustic Variability Characterization for Adaptive Sampling J.P.

Fabre,1 C. Rowley,2 G. Jacobs,2 E. Coelho,2 C.

Description Variability and sensitivity of coupled mix layer-acoustic model systems FB2

Bishop,3 X. Hong,3 and J. Cummings2 1Acoustics Division 2Oceanography Division 3Marine Meteorology Division Introduction: During shallow water antisubmarine warfare missions, environmental uncertainty signifi. For the climate sensitivity, forcing, and feedback analysis, we follow common practice in using the “slab ocean” version of the CCSM3, in which the full dynamic ocean is replaced by a fixed thermodynamic slab with depth and ocean heat convergence prescribed from the fully coupled simulations.

The atmospheric model resolution in these.