Description, analysis and predictions of sea floor roughness using spectral models

by Christopher Gene Fox

Publisher: Naval Oceanographic Office in Bay St. Louis, Miss

Written in English
Cover of: Description, analysis and predictions of sea floor roughness using spectral models | Christopher Gene Fox
Published: Pages: 218 Downloads: 23
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Edition Notes

Other titlesDescription, analysis and prediction of sea floor roughness using spectral models
StatementChristopher Gene Fox
SeriesTechnical report -- TR 279, Technical report (United States. Naval Oceanographic Office) -- TR-279.
ContributionsUnited States. Naval Oceanographic Office
The Physical Object
Paginationxvi, 218 p. :
Number of Pages218
ID Numbers
Open LibraryOL24364698M

The International Roughness Inde (IRIx) 2 8 Literature review summary 30 3. HYPOTHESIS 32 General aims 32 Specific aims 32 4. FUNDAMENTAL CHARACTERISTICS OF ROAD PROFILES 33 Preliminary analysis 34 Spectral characteristics 39 Amplitude domain characteristics 40 Stationarity considerations 47 Transients surface roughness using RSM when slot end milling atical polynomial models using RSM for surface roughness prediction in terms of cutting speed, feed and axial depth of cut for end milling of was developed by Alauddin et al. [25] for BHN steel and by Lou et al. [3] for end milling of EN Using a recently suggested corrective technique, we ensure an unprecedented accuracy in computation of the true contact area evolution under increasing pressure. This accuracy enables us to draw conclusions on the role of the surface's spectrum breadth (Nayak parameter) in Cited by: The objectives of this research are to develop improved data interpretation and analysis procedures which could be used for offshore as well as on-land applications. Data interpretation of SASW measurements involves interpreting a phase spectrum determined in the field.

Estimation of Surface and Interface Roughness Using X-ray Reflectivity and TEM Observation Yoshikazu Fujii Kobe University, kobe , Japan Abstract Surface and interface roughness of multilayer surface are often estimated with using X-ray reflectivity (XRR). In the conventional XRR analysis, the reflectivity is calculated based on the. Sung, Loh, Ratnam: Simulation Approach for Surface Roughness Interval Prediction in 44 network to develop a model for surface roughness in turning. Several image features extracted from the work piece were used as input in the network. The authors showed that the surface. Modeling and Characterization of Contact-Edge Roughness for Minimizing Design and Manufacturing Variations in nm Node Standard Cell Yongchan Ban a, Yuansheng Mab, Harry J. Levinsonb, Yunfei Dengb, Jongwook Kyeb, aThe University of Texas at Austin, Austin, TX USA bGLOBALFOUNDRIES, Sunnyvale, CA USA ABSTRACT. In the paper a new method has been proposed for the determining of the very fine machining uniformity over the elaborated surface and could be applied to different machined materials and machining procedures. The proposed methodology is relatively simple and is essentially formulated in the few subsequent steps: taking surface roughness 3D profile accordingly proposed scheme; estimation of Cited by: 4.

  Volker, excellent reference! I read through it and it presents a nice summary of Groisse model that is hard to find through searches (unless several papers are read ;)) However, it is of note that HFSS14 (and maybe CST, I do not know from my own experience on that) indeed includes two separate models for surface roughness that are a surface impedance approximation as done in Planar 2D MoM . A method is developed for interpreting the statistics of the sun’s glitter on the sea surface in terms of the statistics of the slope distribution. The method consists of two principal phases: (1) of identifying, from geometric considerations, any point on the surface with the particular slope required for the reflection of the” sun’s rays toward the observer; and (2) of interpreting the. In the following we will give a brief summary of the statistical description of roughness. More detailed information can be found in [1,13,20]. The 2-dimensional Power Spectral Density function PSD is defined as the squared modulus of the Fourier transform of the interface topography: 2 2 () 2 00 1 (,) lim (,) d d. xy LL i f x f y xy L.   The profile is set by a surface roughness length, which, over the ocean surface, is not constant; rather, it depends on the underlying (ocean wave) sea state. For instance, at the European Centre for Medium-Range Weather Forecasts this relation is parameterized in terms of surface stress itself, where the scale is set by kinematic viscosity for Cited by:

Description, analysis and predictions of sea floor roughness using spectral models by Christopher Gene Fox Download PDF EPUB FB2

Full text of "Description, analysis and predictions of sea floor roughness using spectral models" See other formats. This chapter covers the details on the analysis and measurement of surface roughness. Analysis of Surface Roughness Surface texture is the repetitive or random deviation from the nominal surface that forms the three-dimensional topography of the surface.

Surface texture includes (1) roughness (nano- and microrough. Roughness determines many functional properties of surfaces, such as adhesion, friction, and (thermal and electrical) contact conductance.

Recent analytical models and simulations enable quantitative prediction of these properties from knowledge of the power spectral density (PSD) Cited by: 2.

The aim of this work is to design an off-line system, method and experimental set-up for predicting surface roughness (Ra) of metal surfaces with the help of audio signals.

The frictional contact between a metal surface and sharp pencil like scratching tool will produce audio signals which vary based on the roughness of the surface.

The samples considered to design and validate the concept are Cited by: 1. Description, analysis and predictions of sea floor roughness using spectral models () ().jpg 1, × 2,; KB Detailed thermal structure of the western gulf stream region () ().jpg 2, × 1,; KBPart of: hydrology.

wavelengths to be out of focus. The spectral analysis is done using a diffraction grating. This technique deviates each wavelength at a different position, intercepting a line of CCD, which in turn indicates the position of the maximum intensity and allows direct correspondence to the Z height position.

Seafloor penetration tests: presentation and analysis of results / View Metadata By: Migliore, H. - Lee, Homa J. - Naval Civil Engineering Laboratory (Port Hueneme, Calif.) - United States. Analysis and Optimization of Parameters Affecting Surface Roughness in Boring Process Fig Response Surface Graph of CA and FR Verses Ra Fig Response Surface Graph of CA and FR Verses Ra 4.

CONFIRMATION EXPERIMENT The confirmation experiment was the final step of the design of the experiment process. Models for road surface roughness Article (PDF Available) in Vehicle System Dynamics 50(5) May with 1, Reads How we measure 'reads'.

where z o is the roughness, u∗ is the friction velocity, and g is the gravitational constant; α, now known as the Charnock parameter, was assumed initially to be r, it has long been recognized that with a constant α does not adequately describe many datasets.

In particular, it was speculated that α was a function of some parameter related to the sea by: Roughness Analysis Procedure Roughness in its traditional sense can be calculated for topographic images or profiles where the data represents height values.

To avoid misinterpretations roughness analysis is disabled for data windows not containing topographic data, such as optical micrographs or scanning electron microscope (SEM) images.

Sea surface roughness z0 is one of the key parameters for the description of the marine atmospheric boundary layer. Four different relations for its estimation are compared here. A regression analysis was performed to search for correlations between RMS, FD, and PSD given fixed-slope power law fit parameters.

Using a stepwise model selection, a statistical model for rapid predictions of RMS was developed. The RMS was computed from FD and the PSD DC offset to within 80% agreement using a linear by: Surface topography parameter analysis using the spectral moment method.

The spectral moments m 0, m 2 and m 4 are defined as: (1) m 0 = AVG [(z 2)], (2) m 2 = AVG [(∂ z ∂ x) 2], (3) m 4 = AVG [(∂ 2 z ∂ x 2) 2], where AVG represents the arithmetic average and z(x) indicates a 2D trace of the surface heights along an arbitrary x-direction of the 3D asperity-peak density Cited by:   The possibility of using an optical spectrum analyzer (OSA) to determine the degree of short gravity-capillary wave damping by films of surface-active substances (SAS) is studied.

Nonlinear mechanisms of optical surface imaging associated with a complex profile of sky brightness and long waves are analyzed. Using the model of free short gravity waves damping by the films, it is shown that Author: I. Sergievskaya. Roughness of a surface as characterized by an atomic force microscope (AFM) is typically expressed using conventional statistical measurements including root-mean-square, peak-to-valley ratio, and average roughness.

However, in these measurements only the vertical distribution of roughness (z-axis) is considered. Additionally, roughness of a surface as determined by AFM is a function of the Cited by: analysis of road roughness records by power spectral density techniques. during recent years, the roughness characteristics of a large number of airport runways have been measured.

roughness content was defined by the power density function, which shows the contribution to the roughness variance of the roughness at each wave by: 4. Recent Analysis on Surface and Interface Roughness Using X-Ray Reflectivity Fujii Y* Center for Supports to Research and Education Activities, Kobe University, KobeJapan *Corresponding author: Fujii Y, Center for Supports to Research and Education Activities, Kobe University.

Models for road surface roughness KLAS BOGSJÖ∗, KRZYSZTOF PODGÓRSKI∗∗ AND IGOR RYCHLIK∗∗∗ Adresses: ∗ Scania CV AB, RTRA Load Analysis, SE Sdertlje, Sweden @ ∗∗ Mathematical Statistics, Centre for Mathematical Sciences, Lund University, Box00 Lund, Sweden [email protected] ∗∗∗ Mathematical Sciences, Chalmers University of.

Gascón and F. Salazar (October 13th ). Simulation of Rough Surfaces and Analysis of Roughness by MATLAB, MATLAB - A Ubiquitous Tool for the Practical Engineer, Clara M.

Ionescu, IntechOpen, DOI: / Available from:Cited by: 3. METHODS FOR PREDICTION OF THE SURFACE ROUGHNESS 3D PARAMETERS ACCORDING TO TECHNOLOGICAL PARAMETERS Krizbergs, J. & Kromanis, A. Abstract: The purpose of the study is to develop techniques to predict the surface roughness of a part to be machined.

Such techniques could be achieved by making mathematical models of Size: 67KB. in turning process of En steel using response surface methodology (RSM) with factorial design of experiments.

A first-order and second-order surface roughness predicting models were developed by using the experimental data and analysis of the relationship between the cutting conditions and response (surface roughness). In the development of. A power spectral density (PSD) analysis of a road profile, however, can give more detailed information about the pavement surface, including roughness information for specific longitudinal wavelengths.

This paper briefly explains PSD analysis and methods of presenting the results. Power spectral density analysis of optical substrates for gravitational-wave interferometry Christopher J.

Walsh, Achim J. Leistner, and Bozenko F. Oreb The power spectral density of surface-relief variations on polished optical surfaces across microscopic. roughness analysis. Dear, I get the image of my film from AFM image (both in 2D and 3D manner). And I want to determine the roughness of the film (both z-axis and xy plane).

Anyone have the idea how to. Transportation agencies can use PSD-based models to precisely convert IRI to PSI given that PSD roughness of a pavement is known. Furthermore, this paper provides a correlation between typical PSI and IRI of flexible and rigid pavements whose PSD roughness is given in.

Quarter-car model-based indirect statistics of road surface roughness are analyzed in this paper. The stochastic process theory is used to establish the relationship between the international roughness index (IRI) statistic of a quarter-car response and the power spectral density (PSD) of road random the circumstance of a linear vehicle model and homogeneous roughness.

Spatial variation in subglacial roughness is therefore likely to be a function of these controls. In Antarctica, very little is known about former ice dynamics and sub-ice geology. Here, we calculate the spectral roughness of subglacial East Antarctica from an analysis of radio-echo sounding by: This is described in the user guide on pages "Flood Modeller 2D – Definition of Components" and "Defining Manning's n Roughness Values Based on OS Mastermap Data".

A third option (though probably not necessary here) is to convert the roughness shapefile into a roughness grid using the Shapefile to Grid tool (in the Flood Modeller toolbox). Surface roughness is the most important criteria in determining the machinability of the material.

Surface Roughness and dimensional accuracy are the major factors needed to predict the machining performances of any machining operation [5]. Most of the Surface Roughness prediction models are empirical and they are generally based on. Roughness affects various part characteristics, including the amount of wear, the ability to form a seal when the part makes contact with something, and the ability to coat the part.

KEYENCE's Introduction to "Roughness" website introduces parameters and case studies related to such surface measurements.SYNOPSIS: Methods for in-situ surface measun;>ment and spectral analysis of Rayleigh waves for subsurface soil investigation have been tried by several researchers in recent years.

The two most common methods, steady-state Rayleigh-wave and spectral--analysis--of-surface-waves (SASW) haveCited by: 6.©LAMSIM Enterprises Inc.

4 PRACTICAL METHOD FOR MODELING CONDUCTOR SURFACE ROUGHNESS USING THE CANNONBALL STACK PRINCIPLE Introduction In the GB/s regime, accurate modeling of conductor losses is a precursor to successful high-speed serial link Size: 2MB.