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.
Results
Showing 1 to 20 of 33 for “"spectral densities"”.
-
Spectral densities of discrete and continuous-indexed random fields
… conditions uniformly, each will have a spectral density function (not necessarily continuous) that is bounded between two positive constants. These spectral density functions will converge in a weak sense to another function (not necessarily continuous) that is also bounded between two …
-
Spline based controller for nonlinear systems
… order of polynomial interpolants and power spectral densities of the controller signals are compared with the exact feedback linearizaton method.;The first objective for power systems is to design nonlinear excitation controllers for a multi-machine power system using Direct Feedback …
-
In-Medium QCD Sum Rules for omega Meson, Nucleon and D Meson
… D meson. By virtue of the sum rules, integrated spectral densities of these hadrons are linked to properties of the QCD ground state, quantified in condensates. For the cases of the omega meson and the nucleon it is discussed how the sum rules allow a restriction of the parameter range of poorly …
-
Theory of the general orientation dependence of ²H NMR spin-lattice relaxation and experiments on model membranes
… T1z, TiQ and T2 and the aP9 depend on reduced spectral densities and spherical order parameters which are independent of the orientation of the magnetic field. Tiz and T1Q relaxation times were measured at every carbon position on a perdeuterated palmitoyl acyl chain on …
-
Predicting the risk for postoperative delirium using routine EEG monitoring data
… feature sets: burst suppression duration, power spectral densities, and signal covariances. Maintenance anesthetic choice created profound EEG differences that classifiers initially exploited as POD proxies rather than detecting genuine vulnerability. Training medication-specific models …
-
Turning and Turbulence: A Comparative Study of Agility and Fluid Mechanics in Men’s and Women’s Soccer
… gender differences were found in power spectral densities or second-order structure functions, suggesting symmetry in the underlying coordination dynamics. A direct cascade was observed in the 0–15m range, indicating a consistent transfer of energy across spatial scales. Team dispersion …
-
Random Vibration Analysis of Higher-Order Nonlinear Beams and Composite Plates with Applications of ARMA Models
… of both the nonlinear frequencies and the power spectral densities are given by the technique.
-
A spectral approach to noninvasive model-based estimation of intracranial pressure
… using the functional relationship between the spectral densities of the routinely measured waveforms. We applied this algorithm to both a simulated and clinical dataset. For the simulated dataset, we achieved a mean error (bias) of 1.2 mmHg and a standard deviation of error (SDE) of 2.2 mmHg. …
-
On-line Computer Analysis of Plant Dynamics
… input/output technique). The ratio of the cross-spectral and auto-spectral densities is also computed to form the transfer function. This correlation method appears to have a good noise rejection. The method is shown to be suitable for industrial plant where noise is significant and the system …
-
Channel shortening equalizers for UWB receiver design simplification
… occupy large bandwidths with very low power spectral densities. This feature makes UWB channels highly rich in multipaths. To exploit the temporal diversity, a UWB receiver usually incorporates Rake reception. Each multipath in the channel carries just a fraction of the signal energy. This …
-
Three essays in econometrics
… essays. In the first essay, entitled “Robust Spectral Analysis,” I introduce quantile spectral densities that summarize the cyclical behavior of time series across their whole distribution by analyzing periodicities in quantile crossings. This approach can capture systematic changes in the …
-
Yawing effects in wind power plants: stochastic wake modeling and control
… low-fidelity engineering wake models. The power-spectral densities of the stochastic models are identified via convex optimization to ensure statistical consistency with high-fidelity large-eddy simulations while preserving model parsimony. We first demonstrate the utility of our approach in …
-
Método atômico para o modelo de Anderson em presença de um campo magnético externo.
… GF of the impurity Anderson model, and the spectral densities depending on the magnetic field ~B. From these results, we calculate the Kondo splitting and compare it with similar results obtained previously within the numerical renormalization group method. We also obtain results within the …
-
Dynamic Programming and Time-Varying Delay Systems
… It calculates quadratic costs and power spectral densities of interconnected continuous-time and discrete-time linear systems. The main contribution of the toolbox is to make well known theory easily applicable for analysis of real-time systems.
-
Thermoacoustic Effects of a Variable Equivalence Ratio in a Single Element Methane Combustor
… approach. The acoustic analysis and power spectral densities were done with a Fast Fourier Transform algorithm.</p> <p>The dominant frequencies, found to be between 1463 Hz and 1551 Hz, compare well with the experimental result of 1390 Hz, showing that the numerical model captured the …
-
Banach Spaces of Analytic Vector-valued Functions
… matrix-valued boundary functions, beginning with spectral factorization in Chapter 2. Then ideas involving approximations with inner and outer functions are used to solve a matrix analogue of the Douglas-Rudin problem in Chapter 3. In both cases, considerable considerable extra difficulties are …
-
Measurement of 'one over f noise' in infrared detection using a novel technique
… the 1/f noise contribution from the power spectral densities. The second approach is a novel technique that extracts the 1/f noise contribution from the total measured noise data that is collected as a function of integration time at a very low photon irradiance. By analyzing the 1/f noise …
-
Improved Gaussian process approximations for spatial and flow fields
… whose covariance functions have well-defined spectral densities. Since many spatial fields are highly non-stationary, in Chapter 4 I construct a new class of non-stationary priors based on multiresolution (discrete wavelet) approximations, with a compatible precomputable approximation. In …
-
Gravitational Wave prediction from Galactic binary populations for LISA
… Using results from the Binary Population and Spectral Synthesis (BPASS) code combined with a Milky Way analogue based on the Feedback in Realistic Environments (FIRE) simulations,we predict 673 white dwarf binaries (WDBs), 4 black hole binaries (BHBs), 86 neutron star binaries, 14 black hole …
-
Analysis of an Intervention to Reduce Truck Drivers' Exposure to Whole-Body Vibration
… may lie in a future analysis of the power spectral densities, which shows the vibration exposures as a function of frequency. Buses and cars produce more high frequency vibration energy, and the air-filled seat pad has been shown to be effective in these vehicles when travelling at moderate …
Page 1 of 2