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  • 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

PROJECTED FRINGE PROFILOMETRY USING A HOLOGRAPHIC TECHNIQUE: A COMPACT DESIGN FOR ENDOSCOPES

Hsiao, Chih-Hung 08 August 2008 (has links)
This paper proposes a miniature gauging system for objects inside a body cavity using the projected fringe profilometry (PSPFP) combined with the endoscope. The fringe pattern is formed by launching a reading bean into a diffraction element . The diffraction element can avoid the influence of projected aberrations by lens and largely reduce the size of projected system. This system has the following properrties: 1. It is a noon-contact, and full field measurement. Only one-shot measurement is needed. It is able to carry on the immediate gauging to the dynamic object. 2. Arrangement of the projected fringe is unique due to the procedure of specific coding. It is easy to revise the errors when undergo phase unwrapping. 3. The double projection scheme compensates the defects of one-shot measurements.
2

REAL TIME PROFILOMETRY USING SIMULTANEOUS DOUBLE FRINGE PROJECTION TECHNIQUES : A COMPACT DESIGN FOR ENDOSCOPES

Hong, Jian-Fong 19 November 2010 (has links)
"none"
3

Systematics of the Superdeformation in the frame of the Projected Shell Model

Lee, Ching-Tsai 26 July 2000 (has links)
none
4

Mori Projected Dynamics On A Quantum System

Nasto, Rachel Harte 30 April 2007 (has links)
In this thesis we discuss Mori Projected Time Dynamics in a quantum mechanical system. As a precursor to calculating the time derivative of a mixed state of the system we examine the derivation of the Mori-Zwanzig formalism and different ways of calculating the time dynamics of various quantum systems. We consider the exact calculation of the time derivative of a mixed state. We then calculate the same time evolution using Mori Theory and compare the two results. From the general calculation of the Mori Equation we were able to perform a series of simple tests to compare Mori Theory to the known result. We discovered that in each of the three simple cases the Mori Equation and the direct calculation of the derivative give the same result, but in the more complicated situations the two calculations differed. This result leads us to believe that the Mori Equation is an accurate way of calculating the derivative of a mechanical variable in a quantum system.
5

Characteristics and analysis of calibration-based phase-shifting projected fringe profilometry

Guo, Je-You 11 July 2005 (has links)
Phase-shifting projected fringe profilometry (PSPFP) is powerful for 3D profile measurements. Test and analysis for accuracy of PSPFP is presented. A novel scheme to identify the accuracy of evaluated phases is propsed as well. This test scheme can be applied to any kind of measurements which use fringe projection techniques.
6

Návrh podnikového finančního plánu / A Draft of a Corporate Financial Plan

Otrubová, Lenka January 2021 (has links)
This master's thesis is focused on drafting corporate financial plan for a selected company which is Drevopal, s. r. o. The diploma thesis consists of 3 parts. The first is the theoretical part which contains the theoretical basis for creating a financial plan. The next part presents and analyzes the company Drevopal, s. r. o. The company's analysis consists of a strategic and financial analysis for the period 2015-2019. In the last part, the financial plan of the company is created in two variants, optimistic and pessimistic.
7

Performance analysis of adaptive arrays with projected perturbation sequences.

Ivandich, Steven A. January 1999 (has links)
Perturbation techniques are useful in the design of low complexity adaptive antenna arrays for estimating the gradient required in stochastic descent algorithms. Implementing projected perturbation sequences in an adaptive array allows the simultaneous reception of signals and the adaptation of the array weights while preserving the constraints imposed on the array weights.This thesis quantifies the performance of narrowband adaptive array processors that employ projected perturbation techniques. For different perturbation receiver structures the performance is determined under idealised conditions and importantly also when practical implementation issues are taken into account.The arrays performance is characterised by analysing the transient performance of the weight covariance matrix and by determining the misadjustment. By drawing similarities between two established analysis techniques a new misadjustment analysis technique is introduced.Practical implementation can impact on the arrays performance such that the benefit of the projected perturbation approach is lost. By characterising the array's sensitivity to perturbation noise additional projections which counteract some implementation effects are identified. The level of loss of performance due to weight quantisation and the limited dynamic range of the array weights is determined.
8

Application of two frequency fringe pattern for phase-shifting projected fringe profilometry

Chen, Hong-Ming 08 July 2005 (has links)
A novel accurate calibration-based phase-shifting projected fringe profilometry (Calibration-based PSPFP) for finding the absolute shape of objects is proposed. In addition to a tremendous savings in time, the benefits of using Calibration-based PSPFP also include greatly reduced environmental vulnerability. Since Calibration-based PSPFP employs a sinusoidal fringe pattern to perform the phase-shifting algorithm, the quality and accuracy of the sinusoidal fringe pattern becomes critical. To evaluate the performance of this measurement scheme and reduce the phase error caused by projected fringes, fabrication of various digital sinusoidal fringe patterns is necessary. Thus, we propose a method to fabricate various digital patterns. Application of a 2-D fringe pattern for Calibration-based PSPFP is proposed as well.
9

The Nuclear Structure Study of Superdeformation in Tb A~150 Odd Mass

Chen, Huei-Hsiung 17 July 2002 (has links)
We introduce the process of the development in the Nuclear Structure Model, the Quantum Theory of the Projected Shell Model and the improvement of the calculating program. Besides we deal with the high-spin superdeformed phenomena. By using the PSM_EO program, the Projected Shell Model is applied to the odd (even-odd) mass nuclei Tb , including 145Tb ,147Tb ,149Tb and 151Tb . The results of theoretical calculations about the transition energy E£^, kinetic moment of inertia J(1) and dynamic moment of inertia J(2) are compared with experimental data to verify the meaning in Physics.
10

3D SHAPE RECONSTRUCTION USING PROJECTED FRINGE PROFILOMETRY FOR AN IMAGE BLURRED BY LINEAR MOTION

Liu, Qiao-Yuan 11 August 2008 (has links)
A projected fringe profilometry (PFP) is an optical measurements technology which is widely used at present in gauging the object's three dimensional appearance. PFP is frequently used in detecting the quality of products in the industry due to the specialty of non-contact type, the short retrieve time and low environmental effect. As a result of the development for many years, PFP treats in the gauging static state of the object's three dimensional appearance has had the extremely fine gauging efficiency and the precision in , however in the dynamic inspected object in the gauging , not yet was still mature. If could to develop a set of gauging way in the dynamic inspected object , the application would be more widespread. Taking PFP as the gauging principle, analyzing the changes between the dynamic treat measured object and the fringe. Using the simple mathematics to describe the interaction relations between the fringe and the inspected the object. Finally, reconstructed the inspected object' three dimensional appearance. May know biggest superiority by the experimental process, in the situation of without losing the information of fringe, PFP can reconstruct the inspected object' three dimensional appearance and do not need the motion condition information.

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