Дисертації з теми "Direct field"
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Bai, Kun. "Direct field-feedback control for permanent magnet spherical motors." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/50141.
Повний текст джерелаAndrikopoulos, Pavlos. "Direct electric field visualization in semiconductor planar structures." Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FAndrikopoulos.pdf.
Повний текст джерелаThesis Advisor(s): Nancy M. Haegel, David Jenn. "December 2006." Includes bibliographical references (p. 125). Also available in print.
Källström, Petter. "Direct Digital Frequency Synthesis in Field-Programmable Gate Arrays." Thesis, Linköping University, Department of Electrical Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56550.
Повний текст джерелаThis thesis is about creation of a Matlab program that suggests and automatically generates a Phase to Sine Amplitude Converter (PSAC) in the hardware language VHDL, suitable for Direct Digital Frequency Synthesis (DDFS). Main hardware target is Field Programmable Gate Arrays (FPGAs).
Focus in this report is how an FPGA works, different methods for sine amplitude generation and their signal qualities vs the hardware resources they use.
Detta exjobb handlar om att skapa ett Matlab-program som föreslår och implementerar en sinusgenerator i hårdvaruspråket VHDL, avsedd för digital frekvenssyntes (DDFS). Ämnad hårdvara för implementeringen är en fältprogrammerbar grindmatris (FPGA).
Fokus i denna rapport ligger på hur en FPGA är uppbyggd, olika metoder för sinusgenerering och vilka kvaliteter på sinusvågen de ger och vilka resurser i hårdvaran de använder.
Mahaffey, Joshua Vincent. "A Direct Approach at Field Computation Using the FMM Framework." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1330913863.
Повний текст джерелаSitapati, Kartik. "Mixed-Field Finite-Element Computations." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/11195.
Повний текст джерелаPh. D.
Vedula, Prakash. "Study of scalar transport in turbulent flows using direct numerical simulations." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/12119.
Повний текст джерелаShih, Chun Yu. "Direct numerical simulation of charged colloids in an oscillating electric field." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/200506.
Повний текст джерелаJing, Hengzhen. "Direct antenna modulations for UWB pulse transmission and near field communications." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1835265221&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Повний текст джерелаVarjo, S. (Sami). "A direct microlens array imaging system for microscopy." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526213828.
Повний текст джерелаTiivistelmä Tässä väitöskirjassa kuvataan ja tarkastellaan uutta mikrolinsseihin perustuvaa mikroskooppista kuvantamismenetelmää. Aiemmin mikrolinssejä on käytetty tavanomaisten mikroskooppien ominaisuuksien laajentamiseen. Tässä työssä perinteiset mikroskooppiobjektit korvataan linssimatolla, kompaktin ja kustannustehokkaan rakenteen saavuttamiseksi. Käyttökohteena laitteelle on kenttädiagnostiikka. Uusi kuvausjärjestelmä perustuu mikrolinssimattoihin, joilla pystytään näytteistämään valokenttää. Muuta taittavaa optiikka ei käytetä. Sadat halkaisijaltaan 100-200 µm olevat linssit kuvaavat kukin pienen osan näytteestä. Linssien välisten signaalien sekoittumisen estämiseen käytetään hyvin kontrolloitua valonlähdettä. Aiemmin esitetyissä ratkaisuissa käytetään esimerkiksi fyysisiä rakenteita yksittäisten linssien takana. Nyt esitetty ratkaisu on yksinkertaisempi. Työssä esitetään uusi menetelmä osakuvista muodostuvan datan rekonstruktioon. Tuloskuvien muodostamiseksi pikselien arvot kerätään rekonstruktiopinnalle, joka on sijoitettu vapaasti esineavaruuteen. Tämä mahdollistaa laskennallisesti tehokkaan tuloskuvan muodostuksen, sekä tilastollisten menetelmien käytön tuloksen laadun parantamiseen. Kehitetyn järjestelmän resoluutiota rajoittaa kameran pikselikoko ja sillä voidaan havaita muutaman mikrometrin kokoisia kohteita. Tulokset osoittavat, että kuvausmenetelmä sopii mikroskooppisten kohteiden kuvaamiseen ilman kalliita suurentavia linssejä. Menetelmän käyttökelpoisuutta havainnollistetaan, muun muassa, automaattisella Schistosoma parasiitin munien tunnistuksella virtsanäytteestä. Uusi kuvausjärjestelmä on mahdollista toteuttaa edullisesti, siinä ei ole liikkuva osia ja se on pieni verrattuna tavanomaiseen mikroskooppiin. Esitetty ratkaisu soveltuu yhdeksi vaihtoehdoksi kenttädiagnostiikan tarpeisiin
Wu, Guangyu 1972. "Direct simulation and deterministic prediction of large-scale nonlinear ocean wave-field." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/33450.
Повний текст джерелаIncludes bibliographical references (p. 251-258).
Despite its coarse approximation of physics, the phase-averaged wave spectrum model has been the only type of tool available for ocean wave prediction in the past 60 years. With the rapid advances in sensing technology, phase-resolved nonlinear wave modeling, and high performance computing capability in recent years, the time has come to start developing a new generation tool for ocean wave prediction using direct phase-resolved simulations. The key issues in developing such a tool are: (i) proper specification of initial/boundary conditions of the nonlinear ocean wave-field; (ii) development of efficient algorithm for simulation of large-scale wave-field evolution on high performance computing platforms; (iii) modeling of nonlinear physics in ocean wave evolution such as wave-wave, wave-current, wave-bottom and wave-wind interactions. The objective of this thesis is to address (i), (ii) and part of (iii). For (i), a multi-level iterative wave reconstruction tool is developed to deter- ministically reconstruct a nonlinear ocean wave-field based on single or multiple wave probe records, using both analytic low-order Stokes solutions and High-Order-Spectral (HOS) nonlinear wave model.
(cont.) With the reconstructed wave-field as the initial conditions, the ocean wave-field can then be simulated and forecasted into the future deterministically with the physics-based phase-resolved wave model. A theoretical framework is developed to provide the validity of the reconstructed wave-field and the predictability of future evolution of the reconstructed wave-field for given wave conditions. The effects of moving probe, ambient current and finite water depth on the predictable region are studied respectively. To demonstrate its efficacy and useful- ness, the wave reconstruction tool is applied to reconstruct the full kinematics of steep two- and three-dimensional irregular waves using both wave-basin measurements and synthetic data. Excellent agreements between the reconstructed nonlinear wave-field and the original specified wave data are obtained. In particular, it is shown that the inclusion of high-order effects in wave reconstruction is of significance, especially for the prediction of the wave kinematics such as velocity and acceleration. For (ii), a highly scalable HOS wave model is developed and applied to study both two- and three-dimensional ocean wave-field evolution for a realistic space and time scale.
(cont.) Effective filtering tools are developed to model the wave breaking process in wave evolution. For (iii), the HOS wave model is enhanced to account for not only nonlinear wave-wave interactions, but also nonlinear wave interaction with variable ambient current. With this tool, the effects of variable ambient current on nonlinear wave-field evolution are investigated. As a final illustration, this tool is applied in practical ship motion control. Based on the deterministically forecasted wave-field provided by this tool, an optimal path is obtained to reduce the RMS heave motion of ship in point-to-point transit.
by Guangyu Wu.
Ph.D.
Strik, Philip Philip Frederik Jozef Simon. "Shaping the single European market in the field of foreign direct investment." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610031.
Повний текст джерелаPang, Jing. "Direct global positioning system P-code acquisition field programmable gate array prototyping." Ohio University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1177700503.
Повний текст джерелаRossek, Sacha J. "Direct optical control of a microwave phase shifter using GaAs field-effect transistors." Thesis, Middlesex University, 1995. http://eprints.mdx.ac.uk/10682/.
Повний текст джерелаLi, Shaopeng. "Development of algorithms for the direct multi-configuration self-consistent field (MCSCF) method." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/6945.
Повний текст джерелаParackal, Bhavana. "An Investigation of Low Temperature Direct Propane Fuel Cells." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35896.
Повний текст джерелаSwartling, Gustaf, and William Johansson. "Foreign Direct Investment in Cuba : A study on the 2014 reforms." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70589.
Повний текст джерелаMinor Field Study (MFS)
Johansson, Malin. "Foreign direct investment as a source of skill-upgrading : -a minor field study in Dakar." Thesis, Växjö University, School of Management and Economics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-5263.
Повний текст джерелаThe last two centuries have been distinguished by technological innovation, liberalization and globalization of the world economy. Out of this environment the multinational enterprises (MNEs) have arisen -seeking the best profit opportunities around the world without consideration to poverty and equality in the host countries. This has raised the interest of the present study where the objective is to assess the impact MNEs have on the host country in terms of transferring know-how. By testing two hypotheses, the study attempts to analyze whether MNEs entail a transfer of skills and also identifies the extent to which MNEs are a potential source of skill-upgrading. The research is realized by a qualitative minor field study in Dakar where 24 semi-structured interviews are carried out at three MNEs and three Senegalese enterprises. The interviews are jointly analyzed with a theoretical framework in order to determinate if there are significant differences between the two types of enterprises concerning the wage-setting, working conditions as well as transfer of know-how. The result shows that MNEs have more training opportunities then local enterprises, the working conditions do not differ significantly. Further there is no evidence found for MNEs paying higher wages then local enterprises judged by the general attitude of the interviewees. It is therefore assumed to be some labor mobility, implying that the training contributed by MNEs might work a source of skill-upgrade for the workforce in Dakar.
Khakdaman, Hamidreza. "A Two Dimensional Model of a Direct Propane Fuel Cell with an Interdigitated Flow Field." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22732.
Повний текст джерелаQi, Yusheng Ph D. Massachusetts Institute of Technology. "Phase-resolved reconstruction and forecast of nonlinear irregular wave field based on direct numerical simulations." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111739.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 241-249).
The problem of phase-resolved reconstruction and forecast of ocean wave field based on measurements is of basic scientific interest and practical importance in ocean science and marine engineering. This capability aids and expands the use and interpretation of field and wave basin measurements, contributing to the study of fundamental wave mechanics. It also expands the operational envelope and improves survivability and efficiency of ships and marine facilities in severe seas. We develop theoretical and computational capabilities to solve this problem, which can be applied to both ocean wave field and wave basin experiments. Given limited wave measurement data, there exists specific space and time domain( s) (the "predictable zone") where the wave-field can be reconstructed and forecasted. In this thesis, using linearized wave theory and reasonable assumptions of the frequency and directional extent of the wave field, we obtain closed-form expressions for (linear) predictable zone PL in terms of set notation involving the individual measurement. We derive and illustrate PL obtained for ("probe") measurements at one or more fixed locations over time, for moving probes, for whole-area wave measurements, and combinations of these. We also consider the problem of optimal deployment of these measurements to maximize the volume of PL in space-time. For J probes, we show that this volume scales as J³ (in contrast to J when the predictable zones of individual measurements are simply summed). With the knowledge of the predictable zone, we develop and validate a high-order reconstruction (HOR) method for the phase-resolved reconstruction of nonlinear wave field given a set of wave measurements. HOR optimizes the amplitude and phase of L free-wave components of the nonlinear wave field, accounting for nonlinear wave interactions up to order M in the evolution to obtain a nonlinear wave field that minimizes the reconstruction error between reconstructed wave field and the given measurements. For a given reconstruction tolerance, L and M are provided in the HOR scheme itself. To demonstrate the validity and efficacy of HOR, we perform extensive tests of general two- and three-dimensional wave fields specified by theoretical Stokes waves, nonlinear simulations, and physical wave fields in tank experiments. The necessary L, for general broad banded wave fields, is shown to be relatively small and substantially less than the free and locked modes needed for the nonlinear evolution. We find that, even for relatively small wave steepness, the inclusion of high-order effects in HOR is important for prediction of wave kinematics not in the measurements. For all the cases we consider, HOR converges to the underlying wave field within a nonlinear spatial-temporal predictable zone PNL (dependent on the measurements and wave nonlinearity). PNL generally extends in time (and space) beyond the measurements, thus obtaining reliable forecast/predictions of the wave field. For linear waves, PNL=PL, verifying the predictable zone theory. With increasing wave nonlinearity, we show that PNL contains and is generally greater than PL. Thus PL provides a (conservative) estimate of PNL when the underlying wave field is not known. For nonlinear steep wave-field, wave breaking plays an important role in the evolution of the wave field. We develop a phenomenological wave breaking model that can be incorporated into the nonlinear evolution engine of HOR to predict breaking onset and simulate proper amount of energy dissipation. Thus HOR can properly reconstruct and forecast nonlinear wave field which may contain breaking events. The breaking model is developed in the spectra domain and based on analysis of simulated two-dimensional wave breaking caused by different wave-wave interaction mechanism, including modulation instability and wave focusing. The developed wave breaking model is calibrated, validated and verified by different wave breaking measurements and excellent agreement is obtained between simulated wave breaking results and measured ones. The wave breaking model can be further used to simulate the locations of breaking events, which is validated statistically by calculating the Phillips statistics. This thesis does not address the issue of wave-body interaction nor the control problem for scale models in the wave basin, but it provides necessary nonlinear whole-field data for intense CFD analysis of wave-body interaction at a level heretofore not possible. The presence of imposed current or wind is not considered at this stage but can be incorporated in the future using the same framework.
by Yusheng Qi.
Ph. D.
Vaithianathan, Elangovan. "Field verification of Standard Installation Direct Design (SIDD) method for 610-mm diameter concrete pipes." Ohio University / OhioLINK, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176237149.
Повний текст джерелаDever, Timothy P. "Direct Torque Control of Resonant Inverter Driven Permanent Magnet Synchronous Motor." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1586426523199448.
Повний текст джерелаAi, Yong-le. "Novel direct field and torque control of six-phase induction machine with special phase current waveform." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/489.
Повний текст джерелаHarle, Thomas. "Radio frequency plasma thrusters : performance evaluation of low magnetic field mode operation through direct thrust measurements." Thesis, University of Surrey, 2015. http://epubs.surrey.ac.uk/807990/.
Повний текст джерелаThornton, Corinne. "DIRECT SUPPORT STAFF RETENTION AND TURNOVER IN THE FIELD OF APPLIED BEHAVIOR ANALYSIS: A NATIONAL SURVEY." Master's thesis, Temple University Libraries, 2018. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/531037.
Повний текст джерелаEd.M.
This paper explores the current rates and correlates of turnover among direct support staff working with individuals with developmental disabilities. While the United State Department of Labor, Bureau of Labor Statistics collects data on annual separation rates by a variety of industry sectors, there is not a recognized sector for the field of Applied Behavior Analysis. Other data sources similarly do not include Applied Behavior Analysis as its own industry sector, which produces a gap in knowledge. This study uses data obtained from providers of services for individuals with developmental disabilities in a national online survey to obtain rates of turnover for the field of Applied Behavior Analysis. Results indicate a lower rate of turnover than what is reported in the fields of education, and social services in general. The results also indicate that pay rate and amount of supervision offered increase retention while training offered pre and post hire has little correlation to rate of turnover.
Temple University--Theses
Tiwale, Nikhil. "Zinc oxide nanowire field effect transistors for sensor applications." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/268227.
Повний текст джерелаMiller, Kelsey, Olivier Guyon, and Jared Males. "Spatial linear dark field control: stabilizing deep contrast for exoplanet imaging using bright speckles." SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS, 2017. http://hdl.handle.net/10150/626442.
Повний текст джерелаZhao, Jibo. "An Efficient Wide-Speed Direct Torque Control Based on Fuzzy Logic Technique." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1352922315.
Повний текст джерелаSimsek, Gunay. "Sensorless Direct Field Oriented Control Of Induction Machine By Flux And Speed Estimation Using Model Reference Adaptive System." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604965/index.pdf.
Повний текст джерелаindirect and direct field oriented. The field to be oriented may be rotor, stator, or airgap flux-linkage. In the indirect field-oriented control, the slip estimation based on the measured or estimated rotor speed is required in order to compute the synchronous speed. There is no need for the flux estimation in such a system. For the direct field oriented case the synchronous speed is computed with the aid of a flux estimator. In DFO, the synchronous speed is iv computed from the ratio of dq-axes fluxes. With the combination of a flux estimator and an open-loop speed estimator one can observe stator-rotor fluxes, rotor-flux angle and rotor speed. In this study, the direct (rotor) flux oriented control system with flux and-open-loop speed estimators is described and tested in real-time with the Evaluation Module named TMS320LF21407 and the Embedded Target software named Vissim from Visual Solutions Company.
Yildirim, Dogan. "Field Oriented Control Of A Permanent Magnet Synchronous Motor Using Space Vector Modulated Direct Ac-ac Matrix Converter." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614302/index.pdf.
Повний текст джерелаAC matrix converter based surface mounted permanent magnet synchronous motor (PMSM) drive system. First, the matrix converter topologies are analyzed and the state-space equations describing the system have been derived in terms of the input and output variables. After that, matrix converter commutation and modulation methods are investigated. A four-step commutation technique based on output current direction provides safe commutation between the matrix converter switches. Then, the matrix converter is simulated for both the open-loop and the closed-loop control. For the closed-loop control, a current regulator (PI controller) controls the output currents and their phase angles. Advanced pulse width modulation and control techniques, such as space vector pulse width modulation and field oriented control, have been used for the closed-loop control of the system. Next, a model of diode-rectified two-level voltage source inverter is developed for simulations. A comparative study of indirect space vector modulated direct matrix converter and space vector modulated diode-rectified two-level voltage source inverter is given in terms of input/output waveforms to verify that the matrix converter fulfills the two-level voltage source inverter operation. Following the verification of matrix converter operation comparing with the diode-rectified two-level voltage source inverter, the simulation model of permanent magnet motor drive system is implemented. Also, a direct matrix converter prototype is constructed for experimental verifications of the results. As a first step in experimental works, filter types are investigated and a three-phase input filter is constructed to reduce the harmonic pollution. Then, direct matrix converter power circuitry and gate-driver circuitry are designed and constructed. To control the matrix switches, the control algorithm is implemented using a DSP and a FPGA. This digital control system measures the output currents and the input voltages with the aid of sensors and controls the matrix converter switches to produce the required PWM pattern to synthesize the reference input current and output voltage vectors, as well. Finally, the simulation results are tested and supported by laboratory experiments involving both an R-L load and a permanent magnet synchronous motor load. During the tests, the line-to-line supply voltage is set to 26 V peak value and a 400 V/3.5 kW surface mounted permanent magnet motor is used.
Buse, Hauke. "Micro- and sub-microstructuring and characterisation of technical surfaces by means of laser direct writing including a novel approach for laser beam profiling." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/8361.
Повний текст джерелаSkelton, Chanda Lee. "Investigations into gametophyte morphology and population sex ratios through direct comparisons between laboratory-grown and field-grown fern gametophytes." [Ames, Iowa : Iowa State University], 2007.
Знайти повний текст джерелаAtkinson, Erin C. "Field-testing of a passive surface water flux meter for the direct measurement of water and solute mass fluxes." [Gainesville, Fla.] : University of Florida, 2007. http://purl.fcla.edu/fcla/etd/UFE0021166.
Повний текст джерелаYang, Hao. "Characteristics of gas-liquid two-phase flow in the anode flow field of liquid feed direct methanol fuel cells /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?MECH%202004%20YANGH.
Повний текст джерелаSalter, Graeme S. "High contrast limitations of slicer based integral field spectrographs." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:de6d946d-063f-4568-8615-ea5154ac5909.
Повний текст джерелаKronberg, Anders. "Design and Simulation of Field Oriented Control and Direct Torque Control for a Permanent Magnet Synchronous Motor with Positive Saliency." Thesis, Uppsala universitet, Elektricitetslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176343.
Повний текст джерелаArias, Escobar Maria Alejandra [Verfasser]. "Direct use of urine as fertilizer : potential risks of loading pharmaceuticals and hormones to field crops / Maria Alejandra Arias Escobar." Bonn : Universitäts- und Landesbibliothek Bonn, 2019. http://d-nb.info/118563620X/34.
Повний текст джерелаPark, Jinwon. "A Runge Kutta Discontinuous Galerkin-Direct Ghost Fluid (RKDG-DGF) Method to Near-field Early-time Underwater Explosion (UNDEX) Simulations." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/28905.
Повний текст джерелаPh. D.
Tango, Gerard Joseph. "Applications of a Direct Fast Field/Reflectivity Method to Wave Propagation Modeling in Underwater Acoustic and Solid Earth Seismic Environments." ScholarWorks@UNO, 1985. https://scholarworks.uno.edu/td/2684.
Повний текст джерелаZhou, Qiping. "Near-field microwave imaging with coherent and interferometric reconstruction methods." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1591903415194694.
Повний текст джерелаHeather, Andrew. "Numerical and physical analysis of liquid break-up and atomisation relating to pressure-swirl gasoline direct injection." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/14401.
Повний текст джерелаSzilas, Casper. "The Tanzanian Minjingu phosphate rock : possibilities and limitations for direct application /." Copenhagen : Royal Veterinary and Agricultural University, Chemistry Department, 2002. http://www.kemi.kvl.dk/c̃asz/thesis_cszilas.pdf.
Повний текст джерелаJustham, Timothy. "Cyclic variation in the flow field behaviour within a direct injection spark ignition engine : a high speed digital particle image velocimetry study." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6551.
Повний текст джерелаChow, Li Sze. "Investigation of direct detection of nerve firing in the human visual system due to axonal field modulation of the magnetic resonance signal." Thesis, University of Sheffield, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425600.
Повний текст джерелаCoskun, Nart. "A comparison of configutration arrays for the resistivity and induced polarisation methods and a direct interpretation technique for vertical profiling field data." Thesis, University of York, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261078.
Повний текст джерелаLibby, Lowell W. "The Effect of Direct Experience on Generating Insight into and Deepending Understanding of Academic Topics Studied by high School Seniors in the Field." Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/LibbyLW2001.pdf.
Повний текст джерелаZeller, Niclas [Verfasser], Uwe [Akademischer Betreuer] Stilla, Franz [Gutachter] Quint, Daniel [Gutachter] Cremers, and Uwe [Gutachter] Stilla. "Direct Plenoptic Odometry - Robust Tracking and Mapping with a Light Field Camera / Niclas Zeller ; Gutachter: Franz Quint, Daniel Cremers, Uwe Stilla ; Betreuer: Uwe Stilla." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1171988001/34.
Повний текст джерелаJeon, Hong Young. "Plant specific direct chemical application field robot /." 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337809.
Повний текст джерелаSource: Dissertation Abstracts International, Volume: 69-11, Section: B, page: 6956. Adviser: Lei F. Tian. Includes bibliographical references (leaves 119-127) Available on microfilm from Pro Quest Information and Learning.
Lin, Chia-han, and 林佳翰. "Direct Growth of Single Zinc Oxide Nanowire Field-Effect Transistor." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/30977524735154846147.
Повний текст джерела國立臺南大學
材料科學系碩士班
101
Zinc oxide nanowire (ZnO NW) is a promising material for building nano-electronic devices. However, it is difficult to position a single nanowire for device fabrication. In this research, we used a strategy including Electron Beam Lithography and Chemical Bath Deposition to directly grow a single Zinc oxide nanowire across a pair of electrodes at low temperature environment. The field-effect phenomenon of the nanowire was observed. According to the current measurement data, the maximum value of electron mobility can reach 134 cm2/V.s, and device showed a threshold voltage of ~2.75 V with the current ratio over ~1000 between ON and OFF states. Finally, for reducing the nanowires resistance, we covered the electrical contacts with aluminum electrode to overcome the Schottky barrier contact resistance, and also applied argon plasma post-treatment to substantially enhance the nanowire mobility.
Hung, Te-Sheng, and 洪德昇. "The Development of Spectral Phase Interferometry for Direct Electric-Field Reconstruction." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/57357208988984719719.
Повний текст джерела國立中正大學
物理所
94
This thesis describes the development to the spectral phase interferometry for direct electric field reconstruction (SPIDER). We first develop a program to simulate the trace of a pulse on the spectral interferogram and retrieve the spectral phase base on a Fourier transform algorithm. We also build a SPIDER apparatus to measure the phase of a pulse from a CPA (chirped-pulse amplification) laser system by employing the algorithm developed. Finally, we calibrate the SPIDER system by calculating the dispersion induced by changing the distance of two gratings in a compressor system and compare the results to that measured by the SPIDER system.
Yeh, Lung-Yi, and 葉隆億. "PID-Fuzzy Speed Control of a Direct Field- Oriented Induction Motor." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/62523070706368643403.
Повний текст джерела中原大學
電機工程研究所
97
In this paper, we present a PID-Fuzzy Logic (PID-FL) controller for the speed control of a direct field-oriented induction motor (DFOIM). Our PID controller is derived based on the Ziegler-Nichols (Z-N) method. The performance of fixed gains PID is not well under all operating conditions. In order to increase the performance of PID, we apply a fuzzy logic to improve the performance. The process to obtain the PID-FL is easily, systematic and only with three membership functions are used for each input and output for low computational burden, which can achieve very good results. The experimental results show that the proposed controller is robust under the load torque operation, and it can significantly improve the controlled speed performance of a DFOIM.