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 191 for “"Linear response"”.
-
Non-linear response of a fluid valve
… of multiple scales is used to study the nonlinear response of a relief valve under a constant static pressure and a sinusoidal dynamic pressure that can be generated by variations in the pneumatic transmission lines. Under certain conditions, large vibrations may occur, causing …
-
Microscopic Theory of Linear Response in Amorphous Materials
… describe the various relaxation processes in the linear viscoelastic response of metallic glasses. In particular, to understand universal properties of relaxation, the VDOS obtained in simulations, or in experiments, is substituted into the model. The nonaffine contribution to elasticity is also …
-
Local Correlation Approaches and Coupled Cluster Linear Response Theory
Quantum mechanical methods are becoming increasingly useful and applicable tools to complement and support experiment. Nonetheless, some barriers to further applications of theoretical models still remain. A coupled cluster singles and doubles (CCSD) calculation, a reliable ab initio method, scales …
-
Constitutive modelling of branched polymer melts in non-linear response
… Pompom constitutive equations. Usually the non-linear terms in this model are fitted to uniaxial extensional data due its sensitivity to levels of branching, but in this thesis I will study a number of other non-linear flows using this model. For each flow the results are compared to experiments …
-
Unearthing the Anticrystal: Criticality in the Linear Response of Disordered Solids
… showing that jammed sphere packings have a valid linear regime despite the presence of a new class of ``contact nonlinearities," demonstrating that the leading order behavior of such solids can be ascertained by linear response. We then investigate the critical nature of the jamming transition, …
-
Non-Linear Response of Framed Structures to Two-Dimensional Earthquake Motion
Made available in DSpace on 2014-12-10T22:22:17Z (GMT). No. of bitstreams: 1 7511612.pdf: 4219629 bytes, checksum: 78b205de77b4279df366acaed028e55a (MD5) Previous issue date: 1974
-
A Linear Response Analysis of Electromagnetic Radiation Emanating From A Plasma
Made available in DSpace on 2014-12-08T22:24:42Z (GMT). No. of bitstreams: 1 7000990.pdf: 4940158 bytes, checksum: 682589e0d7fb6b32daeb8d3883d01b39 (MD5) Previous issue date: 1969
-
A linear response analysis of electromagnetic radiation emanating from a plasma
… The system is described by noting its response to both a bare current probe (the ""true"" response ) and to a “dressed” current probe (the ""screened"" response ) . These response functions are tensors in which longitudinal and transverse effects are treated on an equal basis. The case …
-
Ultrafast Probing of Nonlinear Dynamics in Quantum Materials: Beyond Linear Response Probes
… are sensitive to multiple degrees of freedom. Linear response probes, such as scattering and electron transport measurements, are sensitive to a single electronic degree of freedom and cannot provide insights into electron-electron coupling, which can result in hidden orders and spectral …
-
Conditional distributions arising from variation of parameters in non-linear response functions
This paper proposed the idea that the growth of an individual organism follows a mathematical model very closely and that different individuals follow different members of the same parametric family of models. This idea implies that the variation observed between individuals measured at the same …
-
Development of a Comprehensive Linear Response History Analysis Procedure for Seismic Load Analysis
… reviews the parameters required to perform linear response history analysis according to Chapter 16 of the American Standard ASCE 7-10. A careful analysis is presented about the selection of ground motions using real records and using artificial records generated such that their response …
-
Relaxations in molecularly thin simple liquid films:linear viscoelasticity and non-linear response to shear
… relaxations of molecules under confinement, the linear and nonlinear response of molecularly thin simple liquid films confined between two solid surfaces were studied. The method was to measure the resistance to applied oscillatory shear deformation as a function of frequency and amplitude of …
-
Relaxations in molecularly thin simple liquid films: Linear viscoelasticity and non-linear response to shear
… relaxations of molecules under confinement, the linear and non-linear response of molecularly thin simple liquid films confined between two solid surfaces were studied. The method was to measure the resistance to applied oscillatory shear deformation as a function of frequency and amplitude of …
-
Leveraging the Linear Response Theory in Sensitivity Analysis of Chaotic Dynamical Systems and Turbulent Flows
The linear response theory (LRT) provides a set of powerful mathematical tools for the analysis of system’s reactions to controllable perturbation. In applied sciences, LRT is particularly useful in approximating parametric derivatives of observables induced by a dynamical system. These …
-
Towards an Improved Method for the Prediction of Linear Response Properties of Small Organic Molecules
… We therefore attempt to reduce the scaling of a linear response coupled cluster singles and doubles (LR-CCSD) calculation via a perturbed pair natural orbital (PNO++) local correlation approach which uses an orbital space created using a perturbed density matrix. We find that by creating a …
-
Rational Procedure for Damage Based Serviceability Design of Steel Buildings Under Wind Loads and a Simple Linear Response History Procedure for Building Codes
… steel buildings and the development of a simple linear response history analysis for building codes. In the United States the building codes are generally silent on the issue of serviceability. This has led to a wide variation in design practices related to service level wind loads. Chapter 2 of …
-
Experimental Investigation of Ultrafast Hydration Structure and Dynamics at Sub-Angstrom Lengthscales
… be used to measure the dynamical density-density linear response function for liquid water with Angstrom spatial resolution and 50fs temporal resolution. The results are compared to high-resolution spectroscopic and scattering experiments and simulations on liquid water to relate observed density …
-
An efficient algorithm for sensitivity analysis of chaotic systems
… statistics or long-term averages, also known as linear response, is an open problem. The difficulty is due to an inherent feature of chaos: an exponential growth over time of infinitesimal perturbations, which renders conventional methods for sensitivity computation inapplicable. More …
-
Towards a Reduced-Scaling Method for Calculating Coupled Cluster Response Properties
… extension of these methods for describing response properties like polarizabilities, optical rotations, etc., which are related to the derivative of the wavefunction with respect to external electric or/and magnetic fields, have been fairly limited and conventional reduced-scaling …
-
Effects of feeding diets varying in nutrient density to Hy-Line W-36 laying hens on production performance and profitability
… Over the course of the trial, a significant linear response to increasing nutrient density was seen for average hen-day egg production (18 to 70 wk of age), with Treatments 90 to 105% being 81.87, 81.28, 85.98, and 84.62%, respectively. From 18 to 70 wk of age, a significant linear response …
Page 1 of 10