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Showing 1 to 20 of 89 for “"reflection coefficient"”.
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Osmotic reflection coefficient
… and the reduction is given by the osmotic reflection coefficient [sigma]o,. This work was motivated by understanding the mechanistic aspects of osmotic flow through such membranes, in order to predict [sigma]o. One of the main goals of the research was to develop computational models to …
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Oscillographic presentation of impedances on the reflection-coefficient plane
Thesis: B.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1949
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Algorithm for computation of the acoustic plane-wave reflection coefficient of the ocean bottom
… the reflected pressure field and the plane-wave reflection coefficient are related through a two-dimensional spatial-wavenumber Fourier transform. An algorithm is proposed to evaluate the plane-wave reflection coefficient from the bottom reflected field as a function of angle of incidencè. The …
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The physical mechanism of osmosis and osmotic pressure--a hydrodynamic theory for calculating the osmotic reflection coefficient
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1991.
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The numerical synthesis and inversion of acoustic fields using the Hankel transform with application to the estimation of the plane wave reflection coefficient of the ocean bottom
The plane wave reflection coefficient is an important geometry independent mean of specifying the acoustic response of a horizontally stratified ocean bottom. It is an integral step in the inversion of acoustic field measurements to obtain parameters of the bottom and it is used to characterize an …
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The numerical synthesis and inversion of acoustic fields using the Hankel transform with application to the estimation of the plane wave reflection coefficient of the ocean bottom
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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Dielectric characterization using a Wideband Dielectric Filled Cavity (WDFC)
… to the end of a transmission line and the reflection coefficient is measured. The complex permittivity of the dielectric sample is then derived from the measured reflection coefficient information. 2. The cylindrical cavity is placed between two transmission lines. The complex permittivity …
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A Tri-Ridged Flared Horn for Radio Astronomy Applications
… based on an S-parameter analysis for the reflection coefficient optimisation is also found. The TRWG OMT features a reference port that can be used for gain calibrations. The best result for this TRWG OMT is a maximum of −10 dB reflection coefficient across a 1.2 − 3.5 GHz bandwidth. The …
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Sensitivity study and stability analysis of the Marotzke and Stone ocean-atmosphere model under buoyancy and energy constraints
… radiation gradient and longwave radiation reflection coefficient in the same manner regardless of whether it was in thermal mode or haline mode. Under the energy constraint the study yielded similar results in both modes, with the exception of the equilibrium temperature and salinity having …
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Design and feasibility evaluation of low-cost 3D printing of Horn Antennas
… horn achieved a gain of 9.2 dBi with an input reflection coefficient of −11.9 dB at a centre frequency of 10 GHz. This is in agreement with the measured gain and reflection coefficient of the X-band commercial horn. The Ku-band pyramidal horns that have been metallised using conductive paint …
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Dielectric resonator in the presence of a lossy conductor
… the resonator are enforced, to obtain a complex reflection coefficient. Using the propagation constant from the infinite dielectric rod and the reflection coefficient derived from considering the dielectric-air interface at the resonator ends, a two dimensional search is performed to find the …
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SEISMIC SIGNATURES OF PORE CONNECTIVITY
… Firstly, I use the Zoeppritz equation to analyze reflection coefficient's sensitivity to eight medium parameters; results show they all have significantly different sensitivity. Friability is an empirical parameter introduced in General Singular Approximation (GSA) to measure the extent of pore …
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Miniature Fiber-Optic Farby-Perot Interferometer: Fabrication, Data Processing and Temperature Sensing Application
… visibility, careful control of the effective reflection coefficient is important. Fabry-Perot cavities with different effective reflection coefficient are synthesized, while the relationship between spectrum visibility and cavity length is plotted and compared with simulation results. A …
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Characterization and modeling of magnetic materials and structures
… the Fast Fourier Transform algorithm (FFT). The reflection coefficient is then computed as the ratio between the Fourier Transforms of the response and reference waveforms. From the information contained, the complex impedance of the structure under study can be calculated. This information is …
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UWB antenna using indium tin oxide (ITO)
… and simulated using CST Microwave Studio. The reflection coefficient, radiation pattern, VSWR and gain values were compared and contrast between the two antennas. It can be concluded that the AgHT coated antenna works better than ITO in terms of the gain and radiation pattern while work as good …
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The variation of components in the radiation balance over different fynbos vegitation types
… is to test whether fynbos vegetation has a high reflection coefficient, and the secondary aim is to consider the vegetation at the sites where the radiation measurements were carried out in order to determine whether similar vegetation structural types have similar radiation regimes. In order to …
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On Quantum Reflection and The Casimir Effect : Application to atom-surface scattering
Quantum reflection of the light, neutral and surface sensitive 3He-atom is a novel method for investigating long-range attractive atom-surface potentials. This thesis presents the detailed analysis of experimental data obtained with the Atomic Beam Spin Echo (ABSE) spectrometer by scattering 3He …
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Exact reconstruction of ocean bottom velocity profiles from monochromatic scattering data
… equation from the knowledge of the plane-wave reflection coefficient as a function of vertical wavenumber, r(kz) for all real positive k z. First, the reflection coefficient is shown to decay asymptotically at least as fast as (1/kz2) for large kz and is therefore inteqrable. The …
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Optimal filters for deconvolution of transient signals in the presence of noise
… is represented as the convolution of the reflection coefficient of the line and the input excitation of the line source. The reflection coefficient is generally a train of spikes (delta functions) when the discontinuities are resistive. However, this is not the case when the …
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A Riemann-Hilbert approach to scattering on a one-dimensional semi-infinite crystal
… we obtain an explicit formula for the reflection coefficient off the crystal. We discuss the limiting cases of the strong and weak potentials. For compactly supported potentials we present a general result regarding a relation between the reflection and transmission coefficients.
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