Relevant bibliographies by topics / Mode engineering / Dissertations / Theses
To see the other types of publications on this topic, follow the link: Mode engineering.

Dissertations / Theses on the topic 'Mode engineering'

Author: Grafiati
Published: 10 March 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Mode engineering.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Pennas, Dimitrios Christou. "Mode III Fracture in Advanced Engineering Materials." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486939.

Full text
Abstract:
Delamination is a fundamental failure mode of laminated composites. When laminates are subjected to out-of-plane loading, the resin matrices between the plies often fail, resulting in ply separation or delamination failure. Such loading conditions occur in various ways and depend heavily on the load transfer mo~es in the composite structures. Delamination cracks can be visualised in the fracture mechanics sense to grow, and thus can be characterised in Mode I (opening), Mode II (shear) and Mode III (scissoring or anti-plane shear) and their combinations. __The test techniques for delamination
APA, Harvard, Vancouver, ISO, and other styles
2

Liljestrand, Charlotte. "Spatial mode engineering in mid-infrared optical parametric oscillators." Thesis, KTH, Laserfysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-42705.

Full text
Abstract:
The purpose of this thesis was to investigate the possibilities of enhancing the temporal and spatial coherence of parametric devices in the mid-infrared spectrum by exploiting inherent coherence selection of Bessel beams. Several optical parametric oscillators (OPO) were constructed and characterized for various types of resonators and pump lasers. In the first part of this work an OPO was constructed out of a periodically poled KTP (PPKTP) crystal within a stable resonator. It was pumped by a Q-switched Nd:YAG laser in transversal and longitudinal single mode operation. The OPO was pumped at
APA, Harvard, Vancouver, ISO, and other styles
3

Birge, Jonathan R. (Jonathan Richards). "Methods for engineering sub-two-cycle mode-locked lasers." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53192.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 159-166).<br>We begin by presenting a method to efficiently solve for the steady-state solution of a nonlinear cavity, suitable for simulating a solid-state femtosecond laser. The algorithm directly solves the periodic boundary value problem by using a preconditioned Krylov-Newton shooting solver. The method can be applied to the design and study of mode-locked lasers, as well as the modeling of f
APA, Harvard, Vancouver, ISO, and other styles
4

Bruno, Antonio 1972. "Tearing-mode transport model in the reversed field pinch concept." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/30007.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 2002.<br>Includes bibliographical references (leaves 185-188).<br>In this thesis, a self-consistent model for analyzing the transport performance of a Reversed Field Pinch (RFP)-type of thermonuclear fusion reactor has been developed. The study has been focused on determining equilibrium configurations which describe a plasma evolution dominated by particular instabilities originated by plasma electrical resistivity (tearing-, or resistive interchange, modes). The ultimate goal is to provide a model of transp
APA, Harvard, Vancouver, ISO, and other styles
5

Balucan, Phillip James 1977. "Model reduction of a set of elastic, nested gimbals by component mode selection criteria and static correction modes." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/17520.

Full text
Abstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.<br>Includes bibliographical references (p. 112-113).<br>Model reduction techniques provide for a computationally inexpensive method for solving elastic dynamic problems with complex structures. The elastic nested gimbal problem is a problem which requires model reduction techniques as a means to reduce the dynamic equations. This is done using two methods: one technique employs mode ranking criteria to select modes which influence the dynamics of the problem the most. The second involves the use of sta
APA, Harvard, Vancouver, ISO, and other styles
6

Manoharan, Mohan. "Combined mode I - mode III plane strain fracture toughness of two high carbon steels /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487594970651702.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Moyer, Gordon Stanley 1961. "AN EXPERT SYSTEM FOR FAILURE MODE INVESTIGATION IN RELIABILITY ENGINEERING." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/277237.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Chen, De-Shiou. "Sliding mode observers for automotive alternator." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1384448652.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Hosoda, Takamichi 1965. "Incorporating unobservable heterogeneity in discrete choice model : mode choice model for shopping trips." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9498.

Full text
Abstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.<br>Includes bibliographical references (leaves 90-95).<br>In this thesis, we propose a methodology for incorporating attitudinal data in a choice model to capture unobservable heterogeneity across the population. The key features of this approach are, 1) the concept of latent attitudes, and the assumption that 2) the respondent's answers to psychometric attitudinal questions relating to the importance of attributes are manifestations of these attitudes and that 3) those attitudinal data br
APA, Harvard, Vancouver, ISO, and other styles
10

Yin, Hang. "Mode switch for component-based multi-mode systems." Licentiate thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-16153.

Full text
Abstract:
Component-based software engineering is becoming a prominent solution to the development of complex embedded systems. Since it allows a system to be built by reusable and independently developed components, component-based development substantially facilitates the development of a complex embedded system and allows its complexity to be better managed. Meanwhile, partitioning system behavior into multiple operational modes is also an effective approach to reducing system complexity. Combining the component-based approach with the multi-mode approach, we get a component-based multi-mode system,
APA, Harvard, Vancouver, ISO, and other styles
11

Pogaku, Sindhuja. "SOUND MODE APPLICATION." CSUSB ScholarWorks, 2017. https://scholarworks.lib.csusb.edu/etd/445.

Full text
Abstract:
Currently there are millions of Android cell phone users. Whenever a user changes location, he/she should manually modify the sound mode (ring, vibrate, silent). So, it’s slightly inconvenient to constantly monitor whether the phone is in general or silent mode. Sometimes user might forget to switch the mobile mode and may create a disturbance in the classroom or in the work area. To overcome this problem “Sound Mode Application” is an Android application that allows a user to automatically change the sound mode depending on his/her GPS location. Additionally, the user may activate or deactiva
APA, Harvard, Vancouver, ISO, and other styles
12

Banerjee, Abhishek. "AlGaN/GaN based enhancement mode MOSHEMTs." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/2104/.

Full text
Abstract:
This thesis describes a new gallium nitride (GaN) based transistor technology for electronic switching applications. Conventional GaN based transistors are of the high electron mobility transistor (HEMT) type and are depletion mode devices. These are not suitable for switching applications since an extra DC supply is required to bias the device in the cut-off (off-state) region and the devices are not fail-safe, i.e. incase of malfunction a short-circuit can exist between the main DC supply and ground. Enhancement mode (E-Mode) or normally-off devices can overcome these limitations and if real
APA, Harvard, Vancouver, ISO, and other styles
13

Espinosa, Gútiez Silvia. "Theoretical explanations of I-mode impurity removal and H-mode poloidal pedestal asymmetries." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/119102.

Full text
Abstract:
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2018.<br>Cataloged from PDF version of thesis. "February 2018."<br>Includes bibliographical references (pages 203-214).<br>Using high-z wall materials switches the fusion challenge from heat load handling to removing impurities. I propose the first method of measuring the radial impurity flux from currently available diagnostics. It provides a means of solving the impurity accumulation problem while providing free fueling for optimum tokamak performance. High confinement mode operation was dis
APA, Harvard, Vancouver, ISO, and other styles
14

Niu, Li. "Studies of imbalance difference theory in modeling conversion between differential mode and common mode signals." Thesis, Clemson University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3680740.

Full text
Abstract:
<p> This dissertation describes three related studies regarding the imbalance difference theory in modeling the conversion between differential mode and common mode/antenna mode signals. The topics covered are: rigorous derivation of imbalance difference theory for modeling radiated emission problems, modeling the conversion between differential mode and common mode propagation in transmission lines, and modeling the loading impedance on differential mode signals due to radiated emissions. </p><p> The imbalance difference theory describes a method for calculating the coupling between differ
APA, Harvard, Vancouver, ISO, and other styles
15

El-Rifai, Khalid 1979. "Control of AFMs in contact mode." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/17597.

Full text
Abstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.<br>Includes bibliographical references (leaves 71-74).<br>The Atomic Force Microscope (AFM) is a high precision surface characterization tool commonly used in Nano-technology, Bio-technology, semiconductors, MEMS, and life sciences' applications. As most versatile systems, AFM offers little guarantees on achieving repeatable satisfactory operation. This is the case as AFMs are not used to perform a single predictable task. AFM systems are feedback regulators, which rely on photodiode detector (PSD) sen
APA, Harvard, Vancouver, ISO, and other styles
16

Raghavachary, Sathyanarayanan. "Combined mode I- mode III fracture toughness of a super clean rotor steel and a 0.29C, 0.83Cu steel /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487594970653911.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Jiang, Jingwen. "Vector mode analysis of dispersion-shifted single-mode triangular-index fibers with a trench." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59953.

Full text
Abstract:
A vector mode analysis of dispersion-shifted-mode triangular-index fibers with a trench is presented. The aspects considered are the total dispersion, splice losses and bending loss of such fibers as a function of the trench width and location, wavelength fluctuations, index difference, as well as core radius change. The presence of a trench has pronounced effects on the performance of these fibers, yielding combined advantages of dispersion-shifted and dispersion-flattened fibers, and also improves the splice loss and bending loss characteristics. Some fiber characteristics due to the presenc
APA, Harvard, Vancouver, ISO, and other styles
18

Schroth, James Gregory. "Combined mode I - mode III fracture toughness of a high-strength low-alloy steel /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260859496482.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Peregrym, Denis. "An investigation of shallow water mode coupling effects during single mode transmission." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/39158.

Full text
Abstract:
Thesis (M.S.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and the Woods Hole Oceanographic Institution), 1994.<br>Includes bibliographical references (p. 57-58).<br>by Denis Peregrym.<br>M.S.
APA, Harvard, Vancouver, ISO, and other styles
20

Mihoubi, Zakaria. "Mode-locked surface emitting semiconductor lasers." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/72372/.

Full text
Abstract:
Optically-Pumped Vertical External Cavity Surface Emitting Lasers (OP-VECSELs) arc novel semiconductor-based lasers that have many advantages over other lasers in terms of the power scalability, good beam quality, compactness and low cost they can offer. They can be passively mode-locked with a Semiconductor Saturable Absorber Mirror (SESAM) to produce transformnm-limnited sub-300 fs pulses directly from the laser cavity with high repetition rates. This thesis describes an experimental and theoretical investigation of OP-VECSELs. A full characterization is done on a VECSEL sample to understand
APA, Harvard, Vancouver, ISO, and other styles
21

Melnick, Joshua Robert. "Aluminum Nitride Countour Mode Resonators." Thesis, Rochester Institute of Technology, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1591270.

Full text
Abstract:
<p> Resonators are a major component in RF electronic products. They are used in a host of ways to filter radio signals. Modern and Future RF communications have placed high demands on the industry; requiring low power usage, wide array of applications and resistance to noise. </p><p> In this thesis, a discussion of the motivation for RF MEMS filters and basic theory is given with an explanation of the concepts of Q factor, piezoelectricity, acoustics theory, the major types of resonators (SAW, BAW, CMR or LAMB), apodization theory and techniques as well as design, simulation of CMR and BAW
APA, Harvard, Vancouver, ISO, and other styles
22

Rajagopal, Gopalkrishna. "Optimal mode localization in disordered, periodic structures." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36005.

Full text
APA, Harvard, Vancouver, ISO, and other styles
23

Lisboa, Osni. "Two-mode optical fiber sensors for concrete structures." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37692.

Full text
Abstract:
An optical fiber bending sensor and a quasi-distributed optical fiber sensor, where isolated sensing regions can be designed to sense strain, bending, etc., are developed as sensor candidates for smart civil engineering materials and structures. Both sensors use two-mode fibers. With the same two-mode fibers, acousto-optic frequency shifters are developed as the main components to accomplish these sensors. Elliptical-core two-mode fibers are chosen to improve the stability and sensitivity of the sensors. A perturbation theory approach is used to investigate the sensing mechanism of the bending
APA, Harvard, Vancouver, ISO, and other styles
24

Minelly, John D. "Field access techniques for single-mode fibres." Thesis, University of Southampton, 1989. https://eprints.soton.ac.uk/396389/.

Full text
Abstract:
This thesis reports on the exploitation of the beam-expanding properties of tapers in single-mode fibres and on the development of a new and versatile approach to fibre polishing. A theoretical study of the fused-taper coupler explains the differences in coupling and polarisation characteristics of strongly-fused and weakly-fused couplers in terms of the difference in tunnelling capability of TE and TM polarised waves. A study of the application of glass capillary overjackets in the production of stable taper-based devices resulted in the realisation of the first practical tapered beam-expande
APA, Harvard, Vancouver, ISO, and other styles
25

Hill, Misha K. (Misha Kim) 1975. "A model of a fundamental-mode Lorentz force actuated flexural plate wave resonator." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80071.

Full text
Abstract:
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.<br>Includes bibliographical references (leaves 37-38).<br>by Misha K. Hill.<br>M.Eng.
APA, Harvard, Vancouver, ISO, and other styles
26

Bondarenko, Maksym. "Master-mode set of turbulent 3D channel flow." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/66080/.

Full text
Abstract:
Turbulent flow fields can be expanded into a series in a set of basic functions. The terms of such series are often called modes. A master-mode-set is a subset of these modes, the time-history of which uniquely determines the time history of the entire turbulent flow provided that this flow is developed. In the present work the existence of the master-mode-set is demonstrated numerically for turbulent channel flow. The minimal size of a master-mode set and the rate of the process of the recovery of the entire flow from the master-mode set history are estimated. The velocity field corresponding
APA, Harvard, Vancouver, ISO, and other styles
27

Alsumiri, Mohammed. "Sliding mode control of renewable energy generation systems." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2014521/.

Full text
Abstract:
As a result of decades of research and innovation in the renewable energy industry, advanced technologies have been developed for both wind and solar energy conversion systems. However, there are still some aspects of the systems that need to be enhanced to enable maximum and cost effective energy conversion. Wind is emerging as an alternative source for electrical power generation. Small-scale wind power generation system applications are becoming widespread because of rising fuel prices and the demand for reducing carbon emission. For such applications, vertical axis wind turbines (VAWT) app
APA, Harvard, Vancouver, ISO, and other styles
28

Lounsbury, William P. "Nonlinear Multi-Mode Robust Control For Small Telescopes." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1417781523.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Vourakis, Michail. "Duct mode evaluation for traction motor outlets." Thesis, KTH, Marcus Wallenberg Laboratoriet MWL, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290040.

Full text
Abstract:
This study investigates duct mode propagation at outlets of traction motors, featuring an open fan air-cooled architecture. Both acoustical measurements and simulations are employed. Measurements are performed for two duct outlet geometries, a radial and a non-radial outlet, both combined with an equidistant and a non-equidistant blade fan. Specifically, six microphones are flush-mounted circumferentially at the entrance of each duct outlet (downstream of fan blade). Additionally, five microphones are placed circumferentially above the exit of each duct outlet. Measurements from both positions
APA, Harvard, Vancouver, ISO, and other styles
30

Weng, Yi. "Spatial Division Multiplexed Transmission and Sensing in Few-Mode Fibers." Thesis, University of Louisiana at Lafayette, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10261316.

Full text
Abstract:
<p> Space division multiplexing (SDM) has become a promising approach in the telecom industry to reduce the cost-per-bit of optical fiber transmission and to resolve the approaching bandwidth crunch. Meanwhile, intermodal nonlinear effects in few-mode fibers (FMF) potentially provide some novel applications along with sophisticated optical signal processing functionality. Recently, such spatial channels and modes have been applied in optical sensing applications with the returned echo analyzed for the collection of essential environmental information. The key advantages of implementing SDM tec
APA, Harvard, Vancouver, ISO, and other styles
31

Phua, Poh-Boon 1970. "Deterministic approach to polarization mode dispersion." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/26724.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references (leaves 209-224).<br>by Poh-Boon Phua.<br>Ph.D.
APA, Harvard, Vancouver, ISO, and other styles
32

Ng, Cheng Man. "Electroencephalogram analysis based on empirical mode decomposition." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493507.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Hugo, Etienne Martin. "Automated design of multi-mode fuzzy controllers." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51631.

Full text
Abstract:
Dissertation (PhD)--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: A standard fuzzy logic controller is not robust enough to guarantee consistent closed-loop performance for highly non-linear plants. A finely tuned closed-loop response loses relevance as the system dynamics change with operating conditions. The self-adaptive fuzzy logic controller can track changes in the system parameters and modify the controller parameters accordingly. In most cases, self-adaptive fuzzy logic controllers are complex and rely on some form of mathematical plant model. The multi-mode fuzzy logic
APA, Harvard, Vancouver, ISO, and other styles
34

Chang, Hao-Chi. "Sliding mode control design based on block control principle /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486461246815228.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Yao, Wang. "4?50G bps PAM4 System over 60km of Single-Mode Fiber." Thesis, University of Louisiana at Lafayette, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10277257.

Full text
Abstract:
<p>In recent years, the growth demand of information transmission has promoted the development of communication technology. Many modulation methods are used in many fields, such as QPSK and OFDM, which are used in long-distance communication. In this thesis, I discussed the PAM-4, which can be used in inter-data center (<80km) links due to its better performance and lower cost. Then I tested one channel 4?50Gbps PAM-4 system and eight channels 4?50Gbps PAM-4 system with varying degrees of gain of optical amplifier and length of DCF. Finally, I discussed the performance of the two designs and f
APA, Harvard, Vancouver, ISO, and other styles
36

Malhotra, Namrata. "International entry mode decisions of professional service firms, the case of engineering consulting." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0025/NQ46881.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Jiang, Xin. "Engineering of novel single- and multi-mode infrared optical fibres for device applications." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.530831.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Ellison, Rachel (Rachel M. ). "Mode II fracture mechanics of moso bamboo for application in novel engineering materials." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98653.

Full text
Abstract:
Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 32-34).<br>Bamboo has been used as a structural material for thousands of years. Recently there has been increasing interest in its use as a modem construction material. In this study, as part of a larger project to characterize the mechanical properties of Moso bamboo for application in the production of structural bamboo products (SBP), end-notched flexure (ENF) tests and three-point bending tests we
APA, Harvard, Vancouver, ISO, and other styles
39

Pusino, Vincenzo. "High power, high frequency mode-locked semiconductor lasers." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5174/.

Full text
Abstract:
Integrated mode-locked laser diodes are effective sources of periodic sequences of optical pulses, which have always been of great interest for a range of spectroscopy, imaging and optical communications applications. However, some disadvantages prevent their widespread use, such as the restricted tuning of their repetition rate and their output power levels never exceeding a few mW. This thesis reports on the work done to address those limitations. Two main findings are presented, the first being the generation of ultra-high repetition rate optical signals through external injection of two co
APA, Harvard, Vancouver, ISO, and other styles
40

Baggett, Joanne Claire. "Bending losses in large mode area holey fibres." Thesis, University of Southampton, 2004. https://eprints.soton.ac.uk/65504/.

Full text
Abstract:
The aims of the study presented here are to develop methods of accurately predicting bend loss in arbitrary index fibres, to use these techniques to explore the potential offered by holey fibres in the large-mode-area, single-mode regime, and to place their performance in context against conventional step-index fibres. In the study presented here, numerical and experimental techniques have been developed that are capable of accurately evaluating the bending losses, the fundamental mode area and the modedness of holey fibres. Note that these techniques are also applicable to conventional solid
APA, Harvard, Vancouver, ISO, and other styles
41

Matsas, Victor Jacob. "Passively and actively mode-locked fibre laser devices." Thesis, University of Southampton, 1993. https://eprints.soton.ac.uk/399129/.

Full text
Abstract:
This thesis examines a number of passively and actively mode-locked fibre laser devices. The passive systems that are described incorporate the fast, saturable absorber-like action of a Kerr-type nonlinear optical switch to provide the passive mode-locking mechanism. Two such all-fibre nonlinear switches are described and analysed, namely the nonlinear optical loop mirror and the nonlinear optical gate. The mode-locked fibre laser systems based on the performance of these devices, informally known as the "Figure-of-eight" laser and the "nonlinear polarisation evolution" laser are described and
APA, Harvard, Vancouver, ISO, and other styles
42

Deng, Wenqi. "Cantilever dynamic analysis in tapping mode atomic force microscopy." Thesis, Liverpool John Moores University, 2015. http://researchonline.ljmu.ac.uk/4349/.

Full text
Abstract:
Tapping mode atomic force microscopy (AFM) is becoming popular in the area of biology, as well as for polymer and semiconductor materials science. Unlike other AFM techniques, it only makes intermittent contact with the sample, which largely reduces any potential surface damage to soft materials, like cells and polymer. Moreover, phase image can also be obtained from tapping mode AFM besides height and amplitude image. Phase images provide extra information on the test sample in comparison with height and amplitude images. Studies have been carried out to investigate the contributions to phase
APA, Harvard, Vancouver, ISO, and other styles
43

Saravanos, Constantine. "Operational window of single-mode optical fibers." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/10834.

Full text
Abstract:
The purpose of this Ph.D. thesis is to define the design window of single-mode dispersion-unshifted fibers. This window, defined in the mode field diameter (MFD) and cutoff wavelength (lambda c) plot is determined by the fiber properties with regards to the chromatic dispersion, the bend loss sensitivity at 1550 nm and the modal noise penalty imposed on high speed operating systems. This has been achieved by developing numerical models used to analyze the properties of optical fibers. These models were used to calculate the propagation characteristics of optical fibers and from them their phys
APA, Harvard, Vancouver, ISO, and other styles
44

Ethier, Jonathan. "MIMO antenna design using characteristic mode concepts." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27683.

Full text
Abstract:
In this thesis we show how characteristic mode (CM) theory can be used to in the design of the antennas with the low envelope correlation coefficients preferred for MIMO antennas. This is due to the fact that the radiated fields of CMs are orthogonal over the radiation sphere. We show how a handheld device structure can be excited at various points (which form the multi-antenna ports) to ensure that each port excites a set of CMs such that the mode indices in each set are different for each antenna. It is this important result which causes the natural orthogonality properties of the CMs to be
APA, Harvard, Vancouver, ISO, and other styles
45

Benyhesan, Mohammad Kassim. "Current-mode CMOS hybrid image sensor." Thesis, University of Missouri - Kansas City, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1540634.

Full text
Abstract:
<p> Digital imaging is growing rapidly making Complimentary Metal-Oxide-Semi conductor (CMOS) image sensor-based cameras indispensable in many modern life devices like cell phones, surveillance devices, personal computers, and tablets. For various purposes wireless portable image systems are widely deployed in many indoor and outdoor places such as hospitals, urban areas, streets, highways, forests, mountains, and towers. However, the increased demand on high-resolution image sensors and improved processing features is expected to increase the power consumption of the CMOS sensor-based camera
APA, Harvard, Vancouver, ISO, and other styles
46

Rourke, Anthony. "The dynamics of multi-mode vibratory rate sensors." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269689.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Dixit, Ravindra. "Sliding Mode Observation and Control for Semiactive Vehicle Suspensions." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20011116-144808.

Full text
Abstract:
<p>Dixit, Ravindra Krishna. Sliding Mode Observation and Control for Semiactive Vehicle Suspen-sions.(Under the direction of Dr. Greg Buckner).This thesis investigates the application of robust, nonlinear observation and control strategies,namely sliding mode observation and control (SMOC), to semiactive vehicle suspensions using amodel reference approach. The vehicle suspension models include realistic nonlinearities in thespring and magnetorheological (MR) damper elements, and the nonlinear reference models incorpo-rateskyhook damping. Since full state measurement is difficult to achieve in
APA, Harvard, Vancouver, ISO, and other styles
48

Spindler, Henry C. (Henry Carlton) 1970. "System identification and optimal control for mixed-mode cooling." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/30334.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.<br>"September 2004."<br>Includes bibliographical references (p. 285-294).<br>The majority of commercial buildings today are designed to be mechanically cooled. To make the task of air conditioning buildings simpler, and in some cases more energy efficient, windows are sealed shut, eliminating occupants' direct access to fresh air. Implementation of an alternative cooling strategy-mixed-mode cooling-is demonstrated in this thesis to yield substantial savings in cooling energy consumption in many U.S.
APA, Harvard, Vancouver, ISO, and other styles
49

Haskara, ?brahim. "Sliding mode estimation and optimization methods in nonlinear control problems /." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488192960166775.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Somogyi, Chad Alexander. "Common mode voltage mitigation strategies using PWM in neutral-point-clamped multilevel inverters." Thesis, Marquette University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1594317.

Full text
Abstract:
<p> Over the last several decades, there has been consistent growth in the research and development of multilevel voltage-source inverter-based adjustable speed motor drives (ASDs) as a result of low cost, high reliability power semiconductors. The three-level neutral-point-clamped (NPC) ASD is a popular multilevel inverter used in low and medium voltage applications because of its ability to produce lower levels of total harmonic distortion (THD) and withstand higher voltages while preserving the rated output power compared to two-level ASDs.</p><p> As with other voltage-source inverters, t
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography