Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"Inversion technique"”.
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Study on the gas performance of ceramic membrane from kaolin prepared by phase inversion technique
… of ceramic membrane from kaolin via simple phase inversion technique. First, ceramic membrane suspension have been prepared by stirring kaolin as raw material, N-methyl-2-pyrollidone (NMP) as solvent and polyethersulfone (PESf) as binder. Phase inversion tchnique conducted by casted the suspension …
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Study on the gas performance of ceramic membrane from kaolin prepared by phase inversion technique
… of ceramic membrane from kaolin via simple phase inversion technique. First, ceramic membrane suspension have been prepared by stirring kaolin as raw material, N-methyl-2-pyrollidone (NMP) as solvent and polyethersulfone (PESf) as binder. Phase inversion tchnique conducted by casted the suspension …
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Structure of the earth’s topmost inner core from seismic waveform inversion
… core, I have developed an automatic waveform inversion technique based on Neighborhood Algorithm. This method takes advantage of the triplicated PKP waveforms at epicentral distances from 130 to 142 degrees and allows us to model P-wave velocity and attenuation structure of the inner core …
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ΧΑΡΑΚΤΗΡΙΣΤΙΚΕΣ ΠΑΡΑΜΕΤΡΟΙ ΣΕΙΣΜΙΚΗΣ ΠΗΓΗΣ ΜΕ ΤΗ ΜΕΘΟΔΟ ΤΗΣ ΑΝΤΙΣΤΡΟΦΗΣ ΤΩΝ ΚΥΜΑΤΩΝ ΧΩΡΟΥ: ΕΛΛΑΔΑ ΚΑΙ Η ΕΥΡΥΤΕΡΗ ΠΕΡΙΟΧΗ ΤΗΣ
… BEEN ANALYZED TO YIELD SOURCE PARAMETERS. AN INVERSION TECHNIQUE OF TELESEISMIC BODY WAVES WAS USED FORRECORDINGS AT 30-90. RECORDING FROM 12-16 STATIONS OF P AND SH WAVEFORMS HAVE BEEN INVERTED SIMULTANEOUSLY, TO GIVE FOCAL MECHANISMS, SOURCE DURATION, RAPTURE COMPLEXITY, SEISMIC MOMENT AND …
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On the feasibility and application of optical p to n inversion
The feasibility of achieving carrier inversion of a properly doped crystal via optical excitation is studied. This process involves a host substrate doped with deep donors for n-type light characteristic and compensated by a shallow acceptor for p-type characteristic in the dark. This substrate is …
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Systematic coarse-graining of ionic liquid
… properties such as pressure. The Boltzmann inversion technique is used to obtain the bonded interactions, and the non-bonded and long-range electrostatic interactions are obtained using the constrained relative entropy (CRE) method, developed in this thesis. The structure and pressure …
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DESCRIPTION OF THE BAKKEN FORMATION’S ROCK PROPERTIES OF THE WILLISTON BASIN, NORTH DAKOTA
… determine rock properties by utilizing seismic inversion techniques. The inversion technique is the most frequently used, by which the seismic interpreters derive lithology and physical properties. In this study, the 2D pre-stack seismic data was obtained from the analysis of Ross Field of the …
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A new technique to find both real and imaginary index of refraction of atmospheric aerosols from clear sky radiance measurements.
A new iterative technique to find both the real and imaginary index of refraction of atmospheric aerosols has been developed which utilizes polarized sky radiance measurements in the solar principal plane. The technique requires that the aerosol size distribution, Rayleigh optical depth, aerosol …
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Efficient inversion methods in underwater acoustics
… sound propagation in the ocean. The proposed inversion techniques are based on the linearization of the generally non-linear inverse problem of parameter estimation in underwater acoustics. These techniques take into account properties of the ocean environment and are accurate in their …
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Global investigation of large earthquakes using InSAR and long-period seismic data
… calculated using two forward modelling techniques and 1-D and 3-D Earth models. For moderate magnitude events the InSAR location improves the fit to the seismic data, but this is not the case for the larger earthquakes, which is partly due to errors in the Earth models used. These …
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Ensemble regression : using ensemble model output for atmospheric dynamics and prediction
Ensemble regression (ER) is a linear inversion technique that uses ensemble statistics from atmospheric model output to make dynamical inferences and forecasts. ER defines a multivariate regression operator using ensemble forecasts and analyses to determine the most probable predict and …
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Novel polymeric microcapsules for targeted drug delivery
… with plasma-induced grafting and a novel phase-inversion technique with chemical grafting. This research demonstrated that microcapsules with a porous shell could be manufactured by interfacial polymerisation. Carboxyl groups introduced onto the pores in the microcapsule by plasma-induced graft …
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Near-optimal inversion of incoherent scatter radar measurements: coding schemes, processing techniques, and experiments
… focuses on developing a modern coding scheme and inversion methodology using Arecibo incoherent scatter radar (ISR) to achieve efficient, and near-optimal estimates of the key ionospheric parameters. In particular, this work considers two aspects of the ISR inversion problem: (i) ISR lag estimates …
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Study on the effect of zeolite rice husk particles on polysulfone membrane
… at different loading were prepared through phase inversion technique. Physical characterization were carried out using thermogravimetric analysis (TGA), scanning electron microscope (SEM), porosity, tensile strength, atomic force microscope (AFM) and water contact angle (CA). The X-ray diffraction …
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Global investigation of large earthquakes using long-period seismic data
… source validation tests for a recent source inversion technique (SCARDEC), which shows a tendency for steeper fault dip angles than those reported in the widely used Global CMT catalogue (GCMT), for large magnitude (Mw ≥ 7.5) shallow thrust earthquakes. We show that SCARDEC source parameters …
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Shear Dispersion in Double-Porosity Systems
… equations. Second, the Reynolds decomposition technique is used to develop a reduced one-dimensional model for advective-dispersive transport in a conduit with equivalent transport coefficients such as the dispersion coefficient and the effective advection term. Third, the Laplace transform …
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Conformational relaxation in heme proteins : ligand rebinding above the glass transition
… temperature dependence. A numerical inversion technique is used to obtain the distribution of dissociated lifetimes, f(logr), from kinetics at a single temperature. The Maximum Entropy Method is outlined, tested with synthetic data, and applied to MbCO kinetics at various …
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Full-profile inversion of ionospheric radar data from Arecibo observatory
Incoherent scatter radar (ISR) technique is used to probe the ionosphere and measure the key state parameters of the ionosphere in thermodynamic equilibrium, including its electron density, ion densities and compositions, electron and ion temperatures, and the associated drift velocities of …
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Enhancement of antifouling properties using rice husk silica particles in polysulfone membrane and optimization of its operating condition
… sheet PSf/RHS membrane was prepared via phase inversion technique. The characterization and performance test were conducted on PSf ultrafiltration membrane prepared from a different additive concentration. The thermal stability of prepared membrane was observed by using thermogravimetric …
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Analytical Estimation of Value at Risk Under Thick Tails and Fast Volatility Updating
… value at risk (VaR) became the most widely used technique for measuring future expected risk for both financial and non-financial institutions. VaR, the measure of the worst expected loss over a given horizon at a given confidence level, depends crucially on the distributional aspects of trading …
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