• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 247
  • 78
  • 59
  • 33
  • 26
  • 14
  • 13
  • 6
  • 5
  • 3
  • 2
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 590
  • 115
  • 68
  • 58
  • 55
  • 51
  • 42
  • 40
  • 39
  • 35
  • 35
  • 35
  • 34
  • 31
  • 31
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Magnetic hysteresis modelling using knowledge based engineering techniques /

Saghafifar, Mahmoud. Unknown Date (has links)
Magnetic hysteresis modelling plays a crucial role in determining the electromagnetic properties of soft magnetic materials. A new approach to modelling is the use of recurrent neural networks, capable of time dependent, dynamic, sequential mapping. This research investigates the implementation and accuracy of this approach among other available hysteresis models. / Thesis (MEng(ElectronicsEngineering))--University of South Australia, 2004.
2

Magnetic hysteresis modelling using knowledge based engineering techniques

Saghafifar, Mahmoud January 2004 (has links)
Magnetic hysteresis modelling plays a crucial role in determining the electromagnetic properties of soft magnetic materials. A new approach to modelling is the use of recurrent neural networks, capable of time dependent, dynamic, sequential mapping. This research investigates the implementation and accuracy of this approach among other available hysteresis models. / thesis (MEng(ElectronicsEngineering))--University of South Australia, 2004.
3

Thermostatted models for hysteresis in magnetic nanoparticles

Robb, Daniel Thomas. January 2002 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2002. / Vita. Includes bibliographical references. Available also from UMI Company.
4

Thermostatted models for hysteresis in magnetic nanoparticles

Robb, Daniel Thomas 10 June 2011 (has links)
Not available / text
5

Acceleration induced hysteresis in a contactor type servomechanism

Dobrzynski, Robert Edmund, 1926- January 1959 (has links)
No description available.
6

Torsional fatigue of wood

Chen, Zheng January 2002 (has links)
No description available.
7

Thermostatted models for hysteresis in magnetic nanoparticles /

Robb, Daniel Thomas. January 2002 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2002. / Vita. Includes bibliographical references (leaves 116-123). Available also in an electronic version.
8

A Cold Model study Of Raceway Hysteresis

Sarkar, Sabita 12 1900 (has links) (PDF)
No description available.
9

The Influence of a Surface on Hysteresis Loops for Single-Domain Ferromagnetic Nanoparticles

Alsari, Saad 09 May 2018 (has links)
No description available.
10

A Fast Non-Linear, Finite Element Solver for Earthquake Response of Buildings

Hewett, Darren Ryan January 2010 (has links)
Design of buildings in earthquake regions requires that the building is made to withstand certain large earthquake magnitudes with a degree of permanent, but energy absorbing, damage. To accurately determine the behaviour of the building while damage occurs, a nonlinear analysis must be used as these effects are non-linear. These computations are often very slow as the building’s response must be calculated many times a second. This thesis seeks to find a faster alternative to the Newmark-β and similar numerical integration schemes commonly used in non-linear seismic structural analysis. Faster computation would enable rapid simulation thus speeding up the design process. It would also allow large Monte Carlo analyses to be done to improve research analysis and allow designers to better account for variability in materials, construction, soil site and other factors that can significantly affect response. For the purposes of this investigation simple two node finite elements were used. The nonlinear component consists of the well-accepted Ramberg-Osgood hysteresis model. The alternative approach used in this thesis is to solve non-linear first order differential equations using a Runge-Kutta based solution. This approach, with added new computational methods, should be more efficient than directly solving the second order equation of motion with Newmark-β. Different test cases were run to establish performance differences in a variety of potential user cases. These cases involved testing different models against both real earthquake data and synthetic input accelerations. In all test cases, the Newmark-β solution yielded the same results as the new solution, as long as a small enough time step was used. When a small time step was used and the results agreed, the new solution was much faster than the Newmark-β solution. In particular, the new numerical solution approach was significantly faster than Newmark-β when the accuracy demanded was 1% or less. As the tolerance was tightened the advantage of the new solution increased exponentially. From this project a set of MATLAB scripts has been created that will reproduce the results given and can also be used to analyse other building models. The overall approach used is also entirely generalisable.

Page generated in 0.0962 seconds