Tesis sobre el tema "Switch"
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Abu-Saymeh, Dirar. "CERL-switch : an ATM voice switch /". free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9904832.
Texto completoKarimi, Arash. "Switch". Thesis, Umeå universitet, Designhögskolan vid Umeå universitet, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-125887.
Texto completoDaneshmand, Mojgan. "Multi-Port RF MEMS Switches and Switch Matrices". Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/878.
Texto completoRF MEMS technology is a good candidate to replace the conventional switches and to realize an entire switch matrix. This technology has a great potential to offer superior RF performance with miniaturized dimensions. Because of the advantages of MEMS technology numerous research studies have been devoted to develop RF MEMS switches. However, they are mostly concentrated on Single-Pole Single-Throw (SPST) configurations and very limited work has been performed on MEMS multi-port switches and switch matrices. Here, this research has been dedicated on developing multi-port RF MEMS switches and amenable interconnect networks for switch matrix applications. To explore the topic, three tasks are considered: planar (2D) multi-port RF MEMS switches, 3D multi-port RF MEMS switches, and RF MEMS switch matrix integration.
One key objective of this thesis is to investigate novel configurations for planar multi-port (SPNT), C-type, and R-type switches. Such switches represent the basic building blocks of switch matrices operating at microwave frequencies. An in house monolithic fabrication process dedicated to electrostatic multi-port RF MEMS switches is developed and fine tuned. The measurement results exhibit an excellent RF performance verifying the concept. Also, thermally actuated multi-port switches for satellite applications are designed and analyzed. The switch performance at room condition as well as at a very low temperature of 77K degrees (to resemble the harsh environment of satellite applications) is measured and discussed in detail.
For the first time, a new category of 3D RF MEMS switches is introduced to the MEMS community. These switches are not only extremely useful for high power applications but also have a great potential for high frequencies and millimetre-waves. The concept is based on the integration of vertically actuated MEMS actuators inside 3D transmission lines such as waveguides and coaxial lines. An SPST and C-type switches based on the integration of rotary thermal and electrostatic actuators are designed and realized. The concept is verified for the frequencies up to 30GHz with measured results. A high power test analysis and measurement data indicates no major change in performance as high as 13W.
The monolithic integration of the RF MEMS switch matrix involves the design and optimization of a unique interconnect network which is amenable to the MEMS fabrication process. While the switches and interconnect lines are fabricated on the front side, taking advantage of the back side patterning provides a high isolation for cross over junctions. Two different techniques are adopted to optimize the interconnect network. They are based on vertical three-via interconnects and electromagnetically coupled junctions. The data illustrates that for a return loss of less than -20dB up to 30GHz, an isolation of better than 40dB is obtained. This technique not only eliminates the need for expensive multilayer manufacturing process such as Low Temperature Co-fired Ceramics (LTCC) but also provides a unique approach to fabricate the entire switch matrix monolithically.
Hadjiahmad, Massoud. "An ATM switch using Starburst packet switch fabric". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0026/MQ34134.pdf.
Texto completoBrown, G. J. "Optical switch systems". Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419354.
Texto completoBhuta, Dimple. "Brain Controlled Switch". VCU Scholars Compass, 2012. http://scholarscompass.vcu.edu/etd/2795.
Texto completoJomah, Adel M. "Instability in switching systems". Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322593.
Texto completoGribble, Simeon S. y Earl R. Switzer. "SWITCHING TO THE FUTURE OF RANGE COMMUNICATIONS AT EDWARDS AFB". International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/607599.
Texto completoThe Edwards Digital Switch (EDS) provides mission critical voice and time-spaceposition information (TSPI) communication switching capability to the Edwards Test Range. The present system has been in operation for about 10 years. The core of this system is based on widely used commercial-off-the-shelf (COTS) time-slot interchange switches that were designed for a 40-year service life. The application layers of the system, comprising the command/control elements and the communications and user interfaces, were custom developed by the prime contractor to satisfy the performance requirements of the Air Force Flight Test Center (AFFTC). Problems with the current system include difficulty in obtaining replacement items for equipment developed by the prime contractor and higher than expected failure rates for this equipment. Based on experience, the service life for the equipment developed by the prime contractor appears to be about 15 years. Another problem is that lower cost packet switches are taking market share from the more traditional time-slot interchange switches. This factor tends to accelerate the obsolescence of the existing COTS equipment. Solutions are being investigated to update or replace the EDS. One solution is to reuse the existing COTS core equipment and replace the present application layers, preferably with COTS. Another solution is to replace the entire system with COTS or vendormodified COTS hardware and software.
Dimitrakopoulos, Nikolaos. "Electromagnetic MEMS RF Switch". Thesis, University of Leeds, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485179.
Texto completoYoussef, Ahmed H., Stuart A. McNamee y Dalphana Bowman. "DIGITAL SWITCH SUSTAINMENT PROGRAM". International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/607578.
Texto completoThis paper describes the status of the Edwards Digital Switch (EDS) [1] and the success of the Digital Switch Sustainment Program (DSSP); a multi-service program aimed at cost-effective means for providing maintenance and development of an advanced digital switching system. This digital communications switching system is deployed at the mission control centers of Edwards AFB, Eglin AFB, and China Lake Naval Air Warfare Center (NAWC). Each system provides the test ranges with mission-critical voice communications and Time Space Position Information (TSPI) switching. Through user-friendly Graphical User Interfaces (GUIs), the switch provides exceptional resource management of radios, telephones, user positions, secure communications, radars, trackers, 4-wire Ear & Mouth (E&M) devices, subscriber services, and other equipment. Developed using commercial equipment, such as the Lucent Technologies Digital Access and Cross-Connect System (DACS) II, the digital switch can integrate and interface with the technologies of other test ranges and customers. The DSSP sustaining engineering contract, a $10M contract awarded in 1997, is a multi-service effort in supporting cost effective maintenance and enhancement for the systems’ software and hardware. Eglin and China Lake have agreed to participate in a Digital Switch Working Group (DSWG) to ensure that this configuration management is in place and that all players follow the same system migration path. These ranges and other interested ranges that agree to purchase systems off the contract and participate in the working group will continue to derive benefits by reducing overhead and eliminating the duplication of effort involved in separate endeavors.
McNeil-Watson, Graham. "Phase switch Monte Carlo". Thesis, University of Bath, 2007. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486842.
Texto completoRossek, 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/.
Texto completoChu, Kan Man. "Cascode voltage switch logic circuits". Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26283.
Texto completoApplied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
Lagerbäck, Findus. "Charging Switch for two batteries". Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93588.
Texto completoBjurdelius, Andreas, Pierre Bjurdelius y Alexander Blomqvist. "Automated Router and Switch Backup". Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-24548.
Texto completoSwitzer, Earl R. y Erwin H. Straehley. "Edwards Digital Switch System Overview". International Foundation for Telemetering, 1992. http://hdl.handle.net/10150/611928.
Texto completoThe Edwards Digital Switch (EDS) is a digital communication system that provides advanced voice networking capabilities to the Edwards Test Range. The EDS is a member of a new family of all-digital switching systems that internally handle data in digital form. To accommodate analog voice and data circuits, conversions between analog and digital formats occur at the system interfaces. The EDS consists of six groups of configuration items: System-level control and monitoring is centralized in the Control and Display Subsystem. Workstations provide subsystem-level control and monitoring. The Central Switching Subsystem, as the primary interface with the range environment, provides system connectivity to radios, telephone circuits, and communications links to other facilities. It integrates the EDS with links to the Control Room Switching Subsystems. Each Control Room Switching Subsystem connects individual user stations within a Mission Control Room or other localized area. The user equipment element consists of a Subscriber Terminal Unit, Channel Expander, and interface panels for headsets, foot switches, and speakers. The Remote Radio Control Unit optimizes usage of available frequencies, allowing control of tunable radios from the Control and Display Subsystem. *The original name, Edwards Communication Switching System (ECSS) was changed to Edwards Digital Switch (EDS) in 1990. The Site Selection Unit facilitates the handover of voice communications between receiver sites when a long-range test is monitored. The system architecture is based on a central system-level control element, a central switch, multiple subsystem-level control elements, multiple subsystem switches, and end-equipment items that are interconnected through the switch network. The EDS combines multiple voice communications applications in a single system. The system is being expanded to integrate voice and data switching. Its major function is support of multiparty networked voice communications within Mission Control Rooms and between other test participants. Other voice functions are an intercom capability including both Direct Access (hot line) and Indirect Access (dial-up), subscriber loop connections to the base-level telephone exchange, and the Public Switched Network System. Digital interfaces allow integration of ciphertext data and Time Space Position Information data switching functions. A system based on the EDS design has also been installed by the Air Force at Eglin AFB. Engineering studies for systems that make use of the EDS design are currently underway by the Navy at China Lake and the Army at White Sands Missile Range. The EDS project office has actively pursued promising program management concepts such as: specifying nondevelopmental items, requiring industry standard interconnectivity and interoperability, and using a multiyear fixed-price requirements-type contract to encourage multiservice participation.
Лопаткін, Юрій Михайлович, Юрий Михайлович Лопаткин, Yurii Mykhailovych Lopatkin, A. G. Malashenko, Yu A. Shevchenko y T. N. Sakun. "Prototype of Stable Molecular Switch". Thesis, Sumy State University, 2016. http://essuir.sumdu.edu.ua/handle/123456789/45768.
Texto completoPekkanen, Peter y David Söderman. "Network Hardening of Multilayer Switch". Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-54674.
Texto completoRising, David P. "Switch reference in Koasati discourse". Dallas : Arlington : Summer Institute of Linguistics ; University of Texas at Arlington, 1992. http://books.google.com/books?id=RClZAAAAMAAJ.
Texto completoStirling, Lesley. "Switch-reference and discourse representation /". Cambridge : Cambridge University Press, 1993. http://catalogue.bnf.fr/ark:/12148/cb355871743.
Texto completoRice, Alexander Harrison. "Switch-Reference in Pastaza Kichwa". BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7322.
Texto completoZhang, Tingting. "Elucidating Mechanisms of IgH Class Switch Recombination Involving Switch Regions and Double Strand Break Joining". Thesis, Harvard University, 2011. http://dissertations.umi.com/gsas.harvard:10047.
Texto completoPanchakshari, Rohit. "Investigating Mechanisms of DNA Double Strand Break Joining of Switch Regions During IgH Class Switch Recombination". Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493369.
Texto completoMedical Sciences
Graham, Michael C. "A counterpulsed, solid-state opening switch". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Jun%5FGraham.pdf.
Texto completoTai, Feng-i. "Photochromic molecules in polymer switch diodes". Thesis, Linköping University, Department of Science and Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6810.
Texto completoPhotochromism has been investigated extensively during recent years. The large interest for information storage in memory applications is associated with the bi-stable character of the photochromism phenomena. In molecular photochromics, two isomers with different absorption spectrum can be obtained according to the specific wavelength of the light exposure. This reversible transformation process can be considered as optical writing/erasing step of a memory.
Here we first report the absorption spectra of solid-state films based on the blends consisting of PC molecules, the spirooxazine 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3’-[3H]phenanthr[9,10-b](1,4)oxazine] (PIII, Sigma-Aldrich, 32,256-3) and a polymer matrix host, poly(2-methoxy-5(2’-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV). The bi-stability in conjugated polymer matrix is studied by following the time evolution of the optical properties of the blends.
Thereafter, the electrical performance of PC-polymer diodes is characterized and reported. While the PIII molecules in the blend bulks are switched to their low energy gap state, forming external energy levels above the valence band of MEH-PPV, the injected charges (hole-dominated) will be trapped by the low energy gap isomer of PIII and that leads to current modulation. PIII molecules can be switched between two energy gap states upon the photo-stimulation, and the I-V characteristics of the device can also be controlled reversibly via the photoisomerization. The retention time of the diode’s electrical switching fits quite well with the absorption characteristics of the blend films; this correspondence builds a good link between the film property and the device behavior.
Furthermore, we observed a two-trap system in the blend diodes from the I-V curves, and a model is proposed which can explain the schematic concept of the trap-limited current modulation. To combine the knowledge and information from the investigations above, we tested a novel device design based on a bi-layer of the PC and polymer materials, and the promising result for future work is presented in the end.
Chen, Hong Xu y n/a. "A high performance ATM switch architecture". Swinburne University of Technology, 2006. http://adt.lib.swin.edu.au./public/adt-VSWT20070405.172354.
Texto completoChen, Hong Xu. "A high performance ATM switch architecture". Australasian Digital Thesis Program, 2007. http://adt.lib.swin.edu.au/public/adt-VSWT20070405.172354/index.html.
Texto completoA thesis submitted for the degree of Doctor of Philosophy, Faculty of Information and Communication Technologies, Swinburne University of Technology, 2006. Typescript. Bibliography p. ?? Includes bibliographical references (p. 135-142).
Pogue, Paul F. P. "Switch : the lives of Club DOMINION". Virtual Press, 2006. http://liblink.bsu.edu/uhtbin/catkey/1337202.
Texto completoDepartment of Journalism
Raby, P. S. "Optimisation of multi-purpose switch centres". Thesis, Liverpool John Moores University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377588.
Texto completoTai, Feng-I. "Photochromic molecules in polymer switch diodes". Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6810.
Texto completoGirone, Michael John 1978. "Tracking switch fluid policies : bounding lookahead". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/87174.
Texto completoIncludes bibliographical references (leaves 29-30).
by Michael John Girone.
S.M.
Mukherji, Shankar 1982. "The dynamics of enzymatic switch cascades". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32747.
Texto completoIncludes bibliographical references (leaf 67).
We examine the dynamics of the mitogen-activated protein kinase (MAPK) multi-step enzymatic switching cascade, a highly conserved architecture utilised in cellular signal transduction. In treating the equations of motion, we replace the usual deterministic differential equation formalism with stochastic equations to accurately model the 'effective collisions' picture of the biochemical reactions that constitute the network. Furthermore we measure the fidelity of the signaling process through the mutual information content between the output of a given switch and the original environmental input to the system. We find that the enzymatic switches act as low-pass filters, with each switch in the cascade able to average over high frequency stochastic fluctuations in the network and throughput cleaner signals to downstream switches. We find optimal regions of mutual information transfer with respect to reaction velocity and species number parameters, and observe the dynamical memory-gain and memory-loss as well as decay in mutual information in quadruple-linked switch systems.
by Shankar Mukherji.
S.B.
Nonato, Rafael. "Clause chaining, switch reference and coordination". Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/87499.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 147-152).
In this thesis I ponder over a constellation of phenomena that revolve around switch reference and coordination, drawing mainly on their instantiation in Kisedje (Je, Brazil). I start by investigating Klsedje's case system. In this language there is a case split along the finite/non-finite axis. I argue that nominative is assigned by INFL, whereas ergative is assigned to the subject of INFL-less clauses. Importantly, the particles I take to instantiated INFL in Kisedje don't have tense semantics, but rather modal semantics. Investigating other properties of this modal INFL in Klsedje, I can determine the fine structure of its clause. This knowledge allows me to argue that the construction that has been identified elsewhere as clause chaining is actually asymmetric clausal coordination. The special properties that seem to distinguish clause chaining from asymmetric clausal coordination are argued to fall out from the structure of the clause in Kisedje. I further propose that the same type of structure is found in the other languages where asymmetric coordination has been called clause chaining. Asymmetric clausal coordination in Kisedje features morphology which indicates whether adjacent conjuncts have the same or different subjects (switch-reference marking). Important evidence for understanding how switch-reference is computed will come from the study of a deletion phenomenon that happens in the neighborhood of switch-reference markers in Kisedje. Besides isolating evidence for a direct agreement relation between switch-reference marking conjunction and the subject of one of the conjuncts, this study makes a contribution to the theory of morphology. Knowing the structure of the clause in Kisedje and the featural composition of switch-reference markers allows me to support a specific theory of switch-reference computation. Given this theory, I argue that asymmetric coordination (the kind of coordination where switch-reference is marked) instances an X-structure, whereas symmetric coordination (which can't be marked for switchreference) instances a flat structure. Such structural difference also allows me to explain other differences between symmetric and asymmetric coordination. Thesis Supervisor:
by Rafael Nonato.
Ph. D.
Lagebjer, Kekkonen Mikaela. "Development of an electromechanical vacuum switch". Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183531.
Texto completoPneumatiska vakuumsystem används idag inom automatiserade industrier. Innan ett automatiserat system är tillåtet att lyfta ett objekt måste kontrollsystemet få en OK signal som informerar om att den önskade vakuumnivån är uppnåd i gripdonet. Enheten som skickar OK signalen kallas en vakuumvakt. För att hålla nere på systemets energikonsumtion ska vakuumvakten även skicka en signal till energisparsystemet. Arbetet är utfört på Piab AB i Täby i Sverige. Syftet med det här examensarbetet var att dimensionera och konstruera en ny elektromekanisk vakuumvakt som kan skicka en signal från två olika vakuumnivåer. Dessa två vakuumnivåer ska vara justerbara men också beroende av varandra för att göra vakuumvakten mer pålitlig. Arbetet resulterade i en elektromekanisk vakuumvakt med två justerbara och beroende av varandra vakuumnivåer. Vakten uppfyllde 13 av 15 testade krav. En av de krav den inte klarade av att uppfylla var höjdbegränsningen, det andra kravet missade vakten marginellt och det var ett prestandakrav. Alla krav kunde inte verifieras, en fullständig verifikation av de specifierade kraven bör göras med en senare prototyp. Mer arbete behöver läggas ner på vakten innan den uppfyller alla krav och fungerar som önskat, men syftet med arbetet kan fortfarande anses vara uppfyllt eftersom alla grundläggande funktioner fungerar som det är tänkt.
Eslinger, Brian. "Synchronization of the Edwards Digital Switch". International Foundation for Telemetering, 1992. http://hdl.handle.net/10150/611935.
Texto completoThe Air Force Flight Test Center (AFFTC) at Edwards, California has installed the Edwards Digital Switch (EDS). The EDS is a DS-1 switch capable of switching voice, encrypted voice, and Time Space Position Information (TSPI) data. Communicating encrypted voice and TSPI data reliably from the EDS to any other communication system requires the two systems operate using the same frequency reference. The need to communicate with other test ranges and over commercially leased lines using the EDS requires synchronization to a standard frequency source. The current synchronization method used at the AFFTC is unacceptable for the EDS. A hierarchal system of synchronization networking will be implemented to provide a common reference to each of the systems interfacing the EDS. The Master Timing Station (MTS), which provides synchronization reference to most of the AFFTC resources, is aging and must be upgraded. The upgrade of the MTS and the restructuring of the synchronization signal distribution will be completed simultaneously. Traceability to the United States Naval Observatory (USNO) and the National Bureau of Standards (NBS) is required to provide the necessary synchronization to allow the EDS to interface reliably with other systems. The Global Positioning System (GPS) is being considered as the primary source for frequency calibration traceable to the USNO and NBS.
Shih-HaoYe y 葉士豪. "Switch Angle Control for Switched Reluctance Motor". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/rp8jm2.
Texto completoHsu, Po-Chun y 許博鈞. "Efficient Switch scheduling for Circuit-Switched On-Chip Networks". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/76297397492062974429.
Texto completo國立東華大學
資訊工程學系
93
System-on-chip (SoC) design provides integrated solutions to many applications such as computer systems, telecommunications, multimedia, consumer electronics, etc. One of the major challenges of designing a SoC chip is the communication architecture between heterogeneous components running different frequencies and possessing different characteristics. Most of the current communication architectures in SoC are based on dedicated wires and buses. As systems grow in complexity, the on-chip communication is expected to become critical for performance, power consumption, reliability, etc. However, the dedicated wiring and bus architectures have their limitation and do not meet these requirements. For next-generation SoC design, circuit-switched and packet-switched networks delivering messages between communicating components have been proposed. Such architecture is called network-on-chip (NoC) or micronetwork. In this thesis, we propose a scheduling scheme that efficiently schedules the connections in the switches in circuit-switched NoC architectures. The cost and latency of the switch in the circuit-switched network can be lowered down with our scheduler. Our algorithm uses three steps to solve these scheduling problems in circuit-switched networks. We translate the connection requirement table of a switch to the bandwidth requirement table with contention freedom in the first step. The second step is to assign the bandwidth requirement table with proper time slots and also calculate the waiting time in the output time slot table. And the last step is to optimize the output time slot table depend on the requirements to lower down the total waiting time in the NoC architecture. For having even more improvement in the future, we show the simulation results of the proposed algorithm to validate our ideas.
Dias, Lino Flávio Monteiro. "Smart Switch". Master's thesis, 2014. http://hdl.handle.net/10316/40391.
Texto completoOs equipamentos electrónicos desempenham um papel extremamente importante no nosso quotidiano. Existe cada vez mais a necessidade de realizar o mínimo esforço em actividades diárias e rotineiras, deixando essa tarefa e gestão para sistemas inteligentes. O trabalho realizado nesta dissertação teve como objectivo principal a criação de um dispositivo electrónico enquadrado no âmbito da domótica, possível de controlar remotamente e de fácil integração em circuitos convencionais já projectados e implementados. Foi elaborado um dispositivo com um teclado de toque (touch control) que comunica via Rádio Frequência (RF), tem a possibilidade de fazer dimming em sistemas de iluminação e controla estores ou qualquer outra carga (resistiva ou indutiva) não superior a 400W. Juntamente com o dispositivo foi criada uma interface com o utilizador (programada no programa Monodevelop), aplicada a um sistema de iluminação com 2 lâmpadas que comunica através da porta USB de um computador e que pode ser compilada em diferentes sistemas operativos. Foram testados experimentalmente 2 sistemas “Smart Switch” com 2 lâmpadas cada um, onde as lâmpadas eram actuadas através da interface com o utilizador compilada para Windows.
Electronic devices play an extremely important role in our daily lives. There is a need to make the minimum effort in daily and routine activities leaving this task and management for intelligent systems. The main goal of this dissertation was the creation of an electronic device that can be fitted in home automation (domotics) that could be controlled remotely and be easily integrated in conventional installations already designed and implemented. It was designed a device with a touch control that communicates by radio frequency (RF) and has the ability to make dimming for lighting systems and control blinds or any charges (resistive or inductive) that not exceed 400W. Along with the device was created a user interface (programmed with Monodevelop) applied to a lighting system with 2 lamps that communicate by USB port of a computer and can be compiled in several operating systems. 2 Smart Switch systems were tested with 2 lamps each controlled by the user interface developed and compiled for Windows.
Hsu, Teng Chieh y 許登傑. "Development of a switched-reluctance motor drive with active power filter assisted three-phase single-switch boost switch-mode rectifier". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/35740211613237191732.
Texto completo國立清華大學
電機工程學系
104
This thesis goes into the development of switched-reluctance motor (SRM) drives powered by different kinds of AC/DC front-ends and making their experimental comparative evaluation. To begin with, the key affairs concerning SRM drive and comparative features of some commonly employed AC/DC converters are explored. Then a three-phase diode rectifier powered SRM drive is established. The asymmetric bridge converter is adopted to construct the SRM drive owing to its high PWM switching control flexibility. Through applying the proposed commutation shifting, current and speed control approaches, better driving characteristics, including acceleration/ deceleration, reversing rotation, regenerative brake and high-speed driving are achieved. Under higher speeds, the current tracking performance will be gradually deteriorated due to the limited field-weakening effect via commutation advanced shift. The DC-link boosting must be applied instead. To accomplish this goal, some power factor corrected (PFC) AC/DC converters, or called switched-mode rectifiers (SMRs), are established and evaluated. A standard full-bridge boost SMR is first built as the active front-end of the SRM drive. With the help of this four-quadrant SMR, the boostable and well-regulated motor DC-link voltage can be established from the mains with PFC. Conversely, the stored kinetic energy can be recovered to the mains during regenerative braking operation. Next, for some specific applications without regenerative braking, a simple three-phase single-switch boost SMR is designed and implemented. Only one full-rated switch is subject to having lower line drawn power quality and slightly larger derating. Finally, an active front-end with active power filter (APF) assisted three-phase single-switch boost SMR is developed. Thanks to the inherent ability possessed by APF, good line drawn power quality is achieved. Moreover, the regenerative braking can also be accomplished. The three-phase inverter with lower rating compared to those of H-bridge SMR can be used for constructing the APF.
FanLin y 林梵. "Electrophysiological correlates of dimension-set switch and response-modality switch". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/93940167751169690097.
Texto completo國立成功大學
心理學系認知科學碩士班
101
Task switching paradigm is widely used to investigate the cognitive control, but is almost focused on the switching of stimulus dimension or S-R mapping level. Experiment 1 is aimed to differentiate dimension-set switch and response-modality switch and to see what the pattern it is when involved switching both. We recruited 24 students ranging from 18~23 years and used high temporal resolution technique, event-related potential, to find the four task types related components. The behavioral data shows that dimension-set switch is significantly slower than response-modality switch and double switch, and by the under-additive switch cost pattern it shows that the two task-set components have interaction. And the foot/hand responses or shape/color dimensions didn’t change the pattern. The overall ERP evidence shows that dimension-set switch is not different from response-modality switch no matter in cue-locked, S1-locked or R1-locked interval. As we put dimension and modality into analysis, in the cue-locked interval, for hand responses, dimension-set switch cost is different from response-modality switch cost in P2 and N2 components, and for foot responses, dimension-set switch cost is different from response-modality switch cost in N1 and P2 components. In the S1-locked interval, there is difference between the two types of single switch in P3 component. In the R1-locked interval, the two single switches had reversed polarity for hand and foot responses. Therefore, from the overall data there are shared processes between dimension-set switch and response-modality switch, but there are distinct modulations between the two according to which modality responded.
Kalyan, Ramana G. "Towards Automated Design of Toggle Switch Mechanisms". Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2659.
Texto completoGonçalves, Diogo Filipe Vieira. "Network coding switch". Master's thesis, 2019. http://hdl.handle.net/10451/40494.
Texto completoO tráfego na internet está a crescer a um ritmo elevado. A ocorrência de Gargalos é, então, cada vez mais, uma ocorrência comum, resultando em atrasos no transporte de informação e em ineficiências. Isto é um problema em parte decorrente do paradigma tradicional “store and foreward”. Quando um pacote chega a um nó da rede, é armazenado numa fila de espera enquanto aguarda por uma decisão de encaminhamento. Quando existe tráfego elevado, as filas de pacotes crescem e os atrasos aumentam (assim como as perdas de pacotes). O conceito de Codificação na Rede procura oferecer um paradigma. A ideia fundamental é a seguinte: à capacidade de armazenamento e encaminhamento. Quando existe tráfego elevado, as filas de pacotes crescem e os atrasos aumentam (assim como a perda dos pacotes).O Conceito de Codificação na Rede procura oferecer uma alternativa de paradigma. A ideia fundamental é a seguinte: à capacidade de armazenamento e encaminhamento é adicionada aos nós a capacidade de combinar pacotes. Com esta Técnica é possível aumentar as taxas de transferência de informação, assim como a resiliência da rede. Para se entender melhor o conceito vajamos um exemplo. Considere um nó A e um B que comunicam através de um ponto de acesso S, num ambiente sem fios. Vejamos as transmissões necessárias para A enviar a e B, e para B enviar mensagem b para A, usando o modelo tradicional:1A envia a para S 2B envia b para S 3S faz broadcast de a para os dois nós4S faz broadcast de b para os dois nós Como se pode observar, foram necessárias quatro transmissões ao todo. Ao aplicarmos codificação na rede podemos poupar no número de transmissões da seguinte forma:1A envia a para S2B envia b para S3S combina as duas mensagens aplicando um XOR sobre elas e envia o resultado, a b, para A e BNo entanto, o exemplo demonstrado acima é um caso base de Linear Network Coding (LNC). Esta técnica de codificação consiste em dar capacidade, a cada nó da rede, de gerar novos pacotes através de combinações lineares de pacotes recebidos anteriormente, multiplicando-os por coeficientes escolhidos de um dado campo finito, sendo o mais comum de tamanho 28. Já no exemplo anterior, em que foi utilizado uma técnica de codificação através do XOR para codificar dois pacotes, o tamanho do campo finito era de 2. Sendo este, então, um caso particular.Porém, o LNC requere que os coeficientes utilizados nas combinações lineares sejam definidos e computados à prori por todos os nós da rede através de um algoritmo e de informação partilhada. Estamos, então, perante uma Limitação desta técnica que introduz um custo. Random Linear Network Coding (RLNC), uma variante da técnica de LNC, permite ultrapassar essa limitação. Isto é possível devido à sua natureza aleatória, significando que os coeficientes empregues nas combinações lineares são gerados deforma aleatória dado um certo campo finito. Esta propriedade garante com uma dada probabilidade, desde que o campo finito tenha um tamanho suficiente largo, de que as combinações lineares geradas sejam independentes entre si, com o intuito de aumentar esta probabilidade, RLNC introduz ainda a capacidade de recodificar pacotes, isto é, codificar pacotes que já foram codificados por outro nó na rede. Assim, quando o nó destinatário recebe uma quantidade suficiente de pacotes codificados que sejam linearmente independentes é possível descodificar os pacotes resolvendo as combinações lineares. Para tal, o destinatário tem de ter conhecimento dos coeficientes empregues nas combinações lineares. Então, por norma, em RLNC os coeficientes empregues nas combinações lineares. Então por norma, em RLNC os coeficientes são anexados ao cabeçalho do pacote, após a codificação deste, para que os coeficientes sejam levados até ao destinatário. Tanto a operação de codificação como de descodificação introduzem uma certa complexidade computacional proporcional ao tamanho dos dados a serem transmitidos. A técnica designada por Generation-based RLNC, permite solucionar este problema. Esta consiste em dividir em grandes quantidades de dados em blocos mais pequenos, chamados gerações. Então, tanto a operação de codificação como a de descodificação são aplicadas por geração e não na totalidade de dados. Existe uma grande quantidade de trabalho teórico relacionado com Network Coding e implementações ao nível da Camada aplicacional. No entanto, não existe nenhum trabalho concreto cujo objetivo tenha sido desenvolver e implementar uma solução de Network Coding diretamente no plano de dados da rede. Isto resulta do facto de os switches serem hardware especializado com função única, não permitindo a codificação de pacotes.Recentemente, no entanto, foram desenvolvidos switches programáveis, que removem esta restrição. Ao contrário dos switches tradicionais que são dispositivos fechados que seguem um conjunto de protocolos definidos pelo fabricante, estes switches permitem ao operador definir exatamente o processamento dos pacotes. Entretanto foi desenvolvida também uma linguagem de alto nível para programar estes novos switches programáveis, designada como P4. Em Suma, uma das limitações de todas as soluções de codificação em rede existentes prende-se com o facto de serem implementações em software. Esta Limitação é resultado de inflexibilidade dos planos de dados em hardware (switches e routers) tradicionais, que não permitem a combinação de pacotes. Nesta dissertação começamos a atacar este problema através da exploração dos novos switches em hardware programáveis, desenhando e implementando um switch que executa Random Linear Network Coding usando a versão mais recente da linguagem de programação de switches P4 (especificamente, P4_16). A avaliação da nossa solução oferece boas perspetivas para a possibilidade de deployment em hardware destas técnicas de codificação em rede, mas apresente também alguns dos desafios que permanecem em aberto para explorar em trabalho futuro.
洪國瀛. "pHEMT Antenna Switch". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/18587502090994435879.
Texto completo明新科技大學
電機工程研究所
95
pHEMT antenna switch has been widely used into advanced monolithic microwave integrated circuits (MMIC) for modern microwave system applications. The advantages of the AlGaAs/InGaAs pseudomorphic high-electron-mobility transistor(pHEMT) antenna switch are low insertion loss , high isolation , and high power handling. A double pole double throw (DPDT) switch has been fabricated and tested for DC-6GHz application. The number of the gate finger is chosen as 2 , and the die area is 1278μm x 1154μm .The control voltage used for the switch is 3V. The measured insertion loss is 1.1dB at 2.45GHz. The isolation of the device is 47dB, and the power 1dB compression point (P1dB) is 30 dBm . The insertion loss is 1.1 dB , the isolation is 35dB, and P1dB is 29.5 dBm at 5.8GHz. A typical application of the DPDT switch is for diversity antenna switching in IEEE 802.11a/b/g Wireless LAN systems. In future, the 4P4T switch will be studied for MIMO application.
Liu, Wen-Shine y 劉玟鑫. "Hyper-Universal Ring Switch Box and Hyper-Rearrangeable Ring Switch Network". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/47331649754307710794.
Texto completo國立臺灣海洋大學
資訊工程學系
100
This paper explores theories on design multipoint interconnection networks, and proposes a ring switch box (RSB) design scheme which can be directly applied to field programmable gate arrays (FPGAs) and communication switching network designs. A switch box on an FPGA is said to be hyper-universal if it is routable for all possible surrounding multi-pin net topologies satisfying the routing resource constraints. We present new hyper-universal RSBs with four sides and w terminals on each side, which is routable for every multi-pin net-routing requirement. Our RSBs and Fan’s SB are hype-universal, but our RSBs with w >23 terminals on each side have better switch-efficiency than Fan’s switch boxes. We also give a formal analysis and extensive benchmark experiments on routability comparisons between today’s most well-known FPGA switch boxes like disjoint switch blocks (Xilinx XC4000 Type), Wilton’s switch blocks, Universal switch blocks, Fan’s switch boxes and our hyper-universal RSBs. We also present an asymmetric switch box that reduce a few switches and it is still hyper-universal. Besides, due to our hyper-universal RSBs designs are highly scalable and regular, thus it is very suitable for FPGA implementation.
Liao, Shih-Wei y 廖士葳. "A Study of Soft Switched Boost Converter Using A Single Switch". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/29273720455720087126.
Texto completo國立臺灣海洋大學
電機工程學系
93
It has been known that conventional switching power supply has switching losses when the switch is turned on or turned off. In order to reduce switching losses, this paper uses soft switching technique. Soft switching circuit consists of a capacitor, two diodes and two inductors. Finally, this soft switching technique can confirmed to reduce switching losses by simulation and experimental results.
Yen-LiangLee y 李彥良. "The study of the relationships among switch benefit, switch cost and attitude toward switch in online stores – The costenefit perspective". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/80102738953197681440.
Texto completo國立成功大學
高階管理碩士在職專班
98
In the studies of Technology Acceptance Model, most prior researches explore the issue from the perceived usefulness, ease of use, attitude toward use, actual use and some extended variables. These researches are helpful for understanding user’s acceptance of new technology and the factors that affect their intension. However, to a certain extent, it can not fully explain the using intension and behavior. Therefore, the primary goal of this research is to discuss the relationship between attitude toward switch and the factors effecting their switch attitude from the cost/benefit perspective. In sampling collection, the research uses the questionnaire survey. In total, 420 questionnaires were sent out and 200 effective questionnaires were returned with effective recovery rate 47.6%. Factor analysis, regression analysis and SEM are used to examine the hypotheses furthermore. The results of the research show that the factors of website have positive effect on the factors of switch benefit, and have negative effect on the factors of switch cost. In addition, the findings also indicate that the factors of switch benefit in online stores have positive effect on attitude toward switch and the factors of switch cost in online stores have a negative effect on attitude toward switch. Finally, attitude toward switch have significant influence on intension toward switch.
Yeh, Yuanyi y 葉源益. "Hydraulic Switch Micro-valve". Thesis, 2002. http://ndltd.ncl.edu.tw/handle/21141523802103460846.
Texto completo國立清華大學
動力機械工程學系
90
In this paper, we present a novel micro valve. The micro valve is an important device of the micro fluid system. It can govern the direction and the flow rate of the fluidic flow. It can also control the process step of a chemical or bio reaction. For an active micro valve, it is often driven by heating, electrostatic, Pneumatics etc. With this novel design, the micro valve is driven by the difference of the pressure of the fluid flow. This is the first present that the driving force takes advantage of the fluid flow itself. The micro valve contains a rotational mass and a pair of channel. With controlling the pressure of the input, we can control the mass rotation among three different angles. The three different angles determine the three kinds of transmission modes. From this, we can switch the fluid between the pair of channel. This micro valve is fabricated by bulk micromachining. We etch the profile of the rotational mass and the channels by ICP technique. Next step, release the rotational mass in order to rotate freely. Finally, bond the silicon wafer and the Pyrex no. 7740 by anodic bonding technique.
Chen, Chien-haur y 陳建豪. "ATM Switch Firmware Design". Thesis, 2000. http://ndltd.ncl.edu.tw/handle/11235411048320047708.
Texto completoJiang, Wei-Rong y 江偉榮. "ATM Switch Hardware Design". Thesis, 2000. http://ndltd.ncl.edu.tw/handle/46469827654673293512.
Texto completo國立中正大學
電機工程研究所
88
Asynchronous Transfer Mode (ATM) is a transfer technology that combines the advantages of circuit switching and flexibility of packet switching. It is possible for ATM to transmit almost all kinds of services. ATM switch is a key element for ATM network. It switches cells from end to end by specified VPI/VCI. In this Thesis, we have designed an ATM switch with PVC and SVC capability. A prototype of ATM switch motherboard and line interface module was created and some tests were performed.
CHIEN, DA-EN y 錢大恩. "Tuning the "Light Switch"". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/10165976247830465090.
Texto completo國立臺灣師範大學
化學系
94
Abstract Complex Ru(bpy)2dppz2+ (dppz: dipyrido[3,2-a:2’,3’-c]phenazin) is a well-known "light switch." After irradiation, it exhibits intense emission in nonaqueous solution, but no emission in aqueous solution. The lifetimes for Ru(bpy)2dppz2+, Ru(dcbpy)2dppz2+, Ru(Cl2bpy)2dppz2+, Ru(tmbpy)2dppz2+ and Ru(dmbpy) 2dppz2+ are 759, 1297, 777, 146 and 264 ns in organic solvent, and 38, 951, 777, 7 and 15 ns in 10% H2O solution, respectively. Complexes Ru(bpy)2dppz2+, Ru(dmbpy)2dppz2+ and Ru(tmbpy)2dppz2+ have similar behavior that the emission is almost completely quenched at 10% water added. The emission intensity of Ru(Cl2bpy)2dppz2+ decreases graduately with increasing water amount up to 50%. Complex Ru(dcbpy)2dppz2+ has lifetime of 80 ns in aqueous solution. Complexes with strong electron withdrawing substituents have longer lifetimes. The emission intensity of these complexes in DNA solution is comparible to the one in nonaqueous solution. Their lifetimes for Ru(bpy)2dppz2+, Ru(dcbpy)2dppz2+, Ru(Cl2bpy)2dppz2+, Ru(tmbpy)2dppz2+ and Ru(dmbpy) 2dppz2+ are 190, 558, 419, 122 and 216 ns in DNA solution. The transient absorption spectra of Ru(tmbpy)2dppz2+ and Ru(dmbpy)2dppz2+ show that the MLCT excited-state has an absorption near 580 nm, which is characteristic of reduced dppz absorption. This is the direct evidence of a dppz localized MLCT excited state.