Tesis sobre el tema "Integration of active systems"
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Rengaraj, Chandrasekaran. "Integration of active chassis control systems for improved vehicle handling performance". Thesis, University of Sunderland, 2012. http://sure.sunderland.ac.uk/4017/.
Texto completoStrahler, Jeremy A. "Integration of an active optical system for Flexlab". Ohio : Ohio University, 2000. http://www.ohiolink.edu/etd/view.cgi?ohiou1173204753.
Texto completoBjörkman, Mårten. "Real-Time Motion and Stereo Cues for Active Visual Observers". Doctoral thesis, KTH, Numerical Analysis and Computer Science, NADA, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3382.
Texto completoZetterqvist, Robert. "Fault localization in IP-based communication infrastructure : Improving network information systems through active equipment integration". Thesis, KTH, Kommunikationsnät, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-169517.
Texto completoEl, Hindi Khalil. "Integrating truth maintenance systems with active database systems for next generation cooperative systems". Thesis, University of Exeter, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385771.
Texto completoSarmiento, Leon Mayra Susana. "Testing platform implementation and system integration for an active/passive imager system including readout circuit design". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 5.32 Mb., 170 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3220740.
Texto completoTonnis, Kevin. "Integration of Highly Active Pt-Sn Nanoparticles into Practical Hydrogen and Direct Ethanol Fuel Cell Systems". University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535464302229881.
Texto completoAl-Haddad, Tristan Farris. "PerFORMance: Integrating Structural Feedback into Design Processes for Complex Surface-Active Form". Thesis, Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-07102006-111810/.
Texto completoChiang, Mao-Hsiung, Yung-Ching Sung y Han-Hsiang Liu. "A Study on Integration of Energy Harvesting System and Semi-Active Control for a Hydraulic Suspension System". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199913.
Texto completoTowe, James Barry. "Integration and iteration of documentation and interactive systems development via the User Action Notation (UAN)". Master's thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12232009-020228/.
Texto completoGhose, Agneta. "Life Cycle Assessment of an Active House : Sustainability concepts by integrating energy, environment and well-being". Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19316.
Texto completoMalekzadeh, Fatemeh. "Integration of Phase Change Materials in Commercial Buildings for Thermal Regulation and Energy Efficiency". Thesis, The University of Arizona, 2015. http://hdl.handle.net/10150/603534.
Texto completoSahin, Murat. "Design And Simulation Of An Abs For An Integrated Active Safety System For Road Vehicles". Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/2/12608801/index.pdf.
Texto completoHernandez, Jorge Eliezer. "Third harmonic management and flexible charging for the integration of electric vehicles into the grid". Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53495.
Texto completoPentarchou, Konstantina. "Web 2.0 tools integration in Online Public AccessCatalogue (OPAC) : users desires and motivation". Thesis, Linnéuniversitetet, Institutionen för informatik (IK), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-36326.
Texto completoMattlet, Benoit. "Potential benefits of load flexibility: A focus on the future Belgian distribution system". Doctoral thesis, Universite Libre de Bruxelles, 2018. https://dipot.ulb.ac.be/dspace/bitstream/2013/271127/5/contratBM.pdf.
Texto completoDoctorat en Sciences de l'ingénieur et technologie
info:eu-repo/semantics/nonPublished
Ellison, Thomas A. "Toward Transforming Health Systems: A Practice Study of Organizing and Practical Inquiry in Academic Medicine". Antioch University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1445818686.
Texto completoPapadakis, Ktistakis Iosif. "An Autonomous Intelligent Robotic Wheelchair to Assist People in Need: Standing-up, Turning-around and Sitting-down". Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1546469803313219.
Texto completoChandler, Dawn, John Dachos, Barbara DeBary-Kesner, Jimmy Howard y Sherry Springs. "Human Systems Integration". Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/7090.
Texto completoEzz, Inas E. "Management support systems integration". Thesis, Brunel University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365077.
Texto completoAkeel, Fatmah Y. "Secure data integration systems". Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/415716/.
Texto completoZumdieck, Alexander. "Dynamics of Active Filament Systems". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1139849910030-68242.
Texto completoActive filament systems such as the cell cytoskeleton represent an intriguing class of novel materials that play an important role in nature. The cytoskeleton for example provides the mechanical basis for many central processes in living cells, such as cell locomotion or cell division. It consists of protein filaments, molecular motors and a host of related proteins that can bind to and cross-link the filaments. The filaments themselves are semiflexible polymers that are typically several micrometers long and made of several hundreds to thousands of subunits. The filaments are structurally polar, i.e. they possess a directionality. This polarity causes the two distinct filament ends to exhibit different properties regarding polymerization and depolymerization and also defines the direction of movement of molecular motors. Filament polymerization as well as force generation and motion of molecular motors are active processes, that constantly use chemical energy. The cytoskeleton is thus an active gel, far from equilibrium. We present theories of such active filament systems and apply them to geometries reminiscent of structures in living cells such as stress fibers, contractile rings or mitotic spindles. Stress fibers are involved in cell locomotion and propel the cell forward, the mitotic spindle mechanically separates the duplicated sets of chromosomes prior to cell division and the contractile ring cleaves the cell during the final stages of cell division. In our theory, we focus in particular on the role of filament polymerization and depolymerization for the dynamics of these structures. Using a mean field description of active filament systems that is based on the microscopic processes of filaments and motors, we show how filament polymerization and depolymerization contribute to the tension in filament bundles and rings. We especially study filament treadmilling, an ubiquitous process in cells, in which one filament end grows at the same rate as the other one shrinks. A key result is that depolymerization of filaments in the presence of linking proteins can induce bundle contraction even in the absence of molecular motors. We extend this description and apply it to the mitotic spindle. Starting from force balance considerations we discuss conditions for spindle formation and stability. We find that motor binding to filament ends is essential for spindle formation. Furthermore we develop a generic continuum description that is based on symmetry considerations and independent of microscopic details. This theory allows us to present a complementary view on filament bundles, as well as to investigate physical mechanisms behind cell cortex dynamics and ring formation in the two dimensional geometry of a cylinder surface. Finally we present a phenomenological description for the dynamics of contractile rings that is based on the balance of forces generated by active processes in the ring with forces necessary to deform the cell. We find that filament turnover is essential for ring contraction with constant velocities such as observed in experiments with fission yeast
Nelson, T. "Integrating action research and journey making during real-world organizational strategy development". Thesis, University of Strathclyde, 2003. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21248.
Texto completoToh, Peng Seng. "Three-dimensional reconstruction by active integration of visual cues". Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46581.
Texto completoFazlollahi, Ariyan. "Benefits of Enterprise Integration Systems". Thesis, KTH, Industriella informations- och styrsystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-98486.
Texto completoErtem, Turker. "Asymptotic Integration Of Dynamical Systems". Phd thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615405/index.pdf.
Texto completo&prime
= f (t, x) (0.1) and the solutions 1 and t of x&prime
&prime
= 0. More specifically, the existence of a solution of (0.1) asymptotic to x(t) = at + b, a, b &isin
R has been obtained. In this thesis we investigate in a systematic way the asymptotic behavior as t &rarr
&infin
of solutions of a class of differential equations of the form (p(t)x&prime
)&prime
+ q(t)x = f (t, x), t &ge
t_0 (0.2) and (p(t)x&prime
)&prime
+ q(t)x = g(t, x, x&prime
), t &ge
t_0 (0.3) by the help of principal u(t) and nonprincipal v(t) solutions of the corresponding homogeneous equation (p(t)x&prime
)&prime
+ q(t)x = 0, t &ge
t_0. (0.4) Here, t_0 &ge
0 is a real number, p &isin
C([t_0,&infin
), (0,&infin
)), q &isin
C([t_0,&infin
),R), f &isin
C([t_0,&infin
) ×
R,R) and g &isin
C([t0,&infin
) ×
R ×
R,R). Our argument is based on the idea of writing the solution of x&prime
&prime
= 0 in terms of principal and nonprincipal solutions as x(t) = av(t) + bu(t), where v(t) = t and u(t) = 1. In the proofs, Banach and Schauder&rsquo
s fixed point theorems are used. The compactness of the operator is obtained by employing the compactness criteria of Riesz and Avramescu. The thesis consists of three chapters. Chapter 1 is introductory and provides statement of the problem, literature review, and basic definitions and theorems. In Chapter 2 first we deal with some asymptotic relationships between the solutions of (0.2) and the principal u(t) and nonprincipal v(t) solutions of (0.4). Then we present existence of a monotone positive solution of (0.3) with prescribed asimptotic behavior. In Chapter 3 we introduce the existence of solution of a singular boundary value problem to the Equation (0.2).
Jones, A. H. "Integration of multiple sensor systems". Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383191.
Texto completoMOREIRA, MARCOS MAGALHAES. "SEMANTIC INTEGRATION OF INFORMATION SYSTEMS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4421@1.
Texto completoThis work presents a semantic approach to information integration based on the OWL ontology language, proposed as a standard language to facilitate the integration of different information sources. The information integration problem is first presented and then the use of ontologies to solve it is addressed. Then, strategies to obtain and extract ontologies are identified, emphasizing database system. Alternative mappings between classes , properties and instances of the resulting ontologies are also proposed.Finally, a case study is developed to apply and validate the strategies presented. As a result, an integrator system architecture is proposed and the implementation of some of its components is discussed.
Hassan, Samy Aly. "Fundamental studies of passive, active and semi-active automotive suspension systems". Thesis, University of Leeds, 1986. http://etheses.whiterose.ac.uk/2691/.
Texto completoJeppesen, B. P. "Enhancing safety in active suspension systems". Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.605592.
Texto completoTruscott, A. J. "Control studies in active suspension systems". Thesis, University of Manchester, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282524.
Texto completoMills, P. G. L. "Active loudspeaker systems with transconductance amplification". Thesis, University of Essex, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384776.
Texto completoHediyeh, Zahabi. "Colour changing electro active polymer systems". Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/24856.
Texto completoHaribabu, Aravind Saravanan. "Active Interaction Complexity in Systems Engineering". Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-301619.
Texto completoI examensarbetet beskrivs hur komplexitetsmätning kan förbättra produktutvecklings- eller designprocesser i samarbete med Scania CV AB. Scania har en stark erfarenhet av fordonsmodularisering och önskade därför undersöka möjligheten att använda komplexitetsmått för arkitektur, utveckling och underhåll av komplexa tekniska produkter som elektrifierade eller självkörande lastbilar och bussar för att få olika typer av fördelar. Sektionen YMPI på Scania, där projektet genomförs, hade dock lite erfarenhet av komplexitetsmått och sökte identifiera och undersöka vilket komplexitetsmått som effektivt fångar komplexiteten hos ett komplext system. Ett ganska komplicerat industriellt fall av en konceptuell variant av ett elektriskt batterifordon (BEV) användes för att demonstrera den nyligen föreslagna metoden för komplexitetsmätning och för att visa dess förmåga att fastställa ett systems tekniska komplexitet. Som ett resultat av detta hittade avhandlingsförfattaren en specifik fallstudie hos Scania och använde lämpliga metoder för att bestämma komplexiteten hos det valda delsystemet med hjälp av det nyligen föreslagna komplexitetsmåttet. Detta gjordes genom att anpassa DSM (Design Structure Matrix) innan den klustrades med klusteralgoritmen IGTA++. Det föreslagna komplexitetsmåttet ger ett högre komplexitetstal jämfört med det traditionella produktkomplexitetsmåttet. Ett annat syfte med avhandlingen var att besvara forskningsfrågorna och genomföra en litteraturstudie inom området modellbaserad systemteknik och produktarkitektur för att definiera den senaste tekniken. I avhandlingen dras slutsatsen att det nyligen föreslagna komplexitetsmåttet, när det tillämpas på det valda delsystemet, ger ett högre komplexitetstal jämfört med det tal som erhålls från produktkomplexitet, vilket innebär att om man inkluderar riktningarna för en interaktion mellan komponenterna och tar hänsyn till de aktiva interagerande komponenterna förbättras komplexitetsmåttets noggrannhet. Därför rekommenderas Scania att använda den föreslagna metod för att fastställa systemets komplexitet och jämföra hur systemet blir mer komplext när ny teknik införlivas eller när system- eller produktarkitekturen ändras, samt att använda detta som en säkerhets- och prestandafaktor för ett system.
Hassan, Marwa M. "Framework for active solar collection systems". Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/28048.
Texto completoPh. D.
Bergamini, Giacomo <1979>. "Photo-and redox-active supramolecular systems". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/475/1/GBergaminiTesiXIXcicl.pdf.
Texto completoBergamini, Giacomo <1979>. "Photo-and redox-active supramolecular systems". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/475/.
Texto completoCarter, Joanna M. "Shipbuilding integration". Thesis, Monterey California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/1841.
Texto completoGarcía, Estébanez Jesús. "GPS-IMU Integration for a Snake Robot with Active Wheels". Thesis, Norwegian University of Science and Technology, Department of Engineering Cybernetics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9107.
Texto completoA snake robot will be defined herein as any multilink robot for whose shape and motion capabilities are reminiscent of a snake like PiKo [1]. PiKo is a five links snake robot with active wheels designed by SINTEF in collaboration with the Norwegian University of Science and Technology (NTNU). Researchers have been greatly interested in the development of robots like PiKo because of its shape versatility and motion capacity in difficult terrains. These skills and properties are useful for rescue teams working in earthquakes, pipe inspection operations and other utilities where access and movement in the terrain are typically difficult. When a working team decides to develop a snake robot, an important point to consider is the development of an efficient navigation system that reaches an accurate position of the robot. Technically speaking, it is prudent to design at the same time a state observer that gives us at least the real time position and velocity information of the robot body to be controlled. The relevance of this information is derived from every control action applied to the robot will require some information about the situation of the robot over time. The controller will need feedback about the robot dynamics and the effect that the control actions have caused. Typically this information has three sources: the information that comes from external sensors, that from internal sensors that transmitting to the control place the measurements from the sensors in the robot body and estimated data from a physical model. All of these feedback sources have some advantages and disadvantages. Implementing an external observer, with external sensors, will not cause space problem with sensors location in the robot body, but when the robot is working inside a pipe, underground or in another hard environment where the optical, magnetic or radio frequency contact is difficult or impossible, the information reception from an external observer is too difficult and expensive or simply impossible. Locating internal sensors in the body of the robot may solve has the problem with the measurements reception, but still pose some difficulties which must be considered by the designer. Many times space becomes a problem when locating some sensors inside the robot body due to size and weight constraints within the robot body. Basing the navigation system instead on a physical model that simulates the robot motion invites the possibility of error due to simplifications taken during the mathematical and physical development. It is impossible to develop a perfect physical model since all the variables, forces, and parameters that depend on the nature characteristics usually are random process and we can just raise a useful factor estimating the average of these effects in our concrete situation. In this thesis a navigation system with a GPS (Global Positioning System) and IMU (Inertial Measurement Unit) fusion was achieved. This navigation system will be work as long the GPS signal is available. The application of the fusion technique further reduces one order the potential errors inherent in using only the GPS navigation system. When the robot will encounter locations where the GPS signal is impossible, this thesis will present a set of tools that not being a universal solution, it will be a set of mathematical tools that depending on the case could give us an accurate navigation system. During the time the GPS signal reception is impossible, this thesis presents the development and implementation of a physical model for a snake robot with active wheels which simulates the snake robot running behavior and studies the possibility to use the trajectory estimated by the model for reaching an accurate navigation system.
Lyall, Evan Harrison. "Surround Integration During Active Sensation in the Mouse Barrel Cortex". Thesis, University of California, Berkeley, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13422798.
Texto completoOrganisms scan their sensors around their environment to build an internal representation of that environment in a process known as active sensation. The integration of information across time and space is critical to providing context as to what is the organism is perceiving. However, the neural circuits that encode and underlie the integration of incoming sensory information have predominantly been studied in the context of passive sensation. Studying these circuits in the context of active sensation is imperative to generating a better understanding of how the brain naturally encodes sensation. This would have profound impacts on understanding the mechanisms of a number of neural disorders, including autism and attention-deficit/hyperactivity disorder, as well as how to improve the acuity of artificial sensation implanted into disabled individuals. To better understand how the mammalian brain encodes and integrates information during active sensation, my collaborators and I developed several novel paradigms to study surround integration in the mouse barrel cortex during active whisking. In Chapter 1 I establish why this is an important problem, and briefly summarize what is already known about sensory coding in the mouse whisker system. In Chapter 2 my collaborators and I probe how mice represent the location of an object within its whisking field, and how the integration of information across surround whiskers affects this representation. In doing so we discover a novel thalamocortical transformation where surround integration in the cortex suppresses activity in layer 4 of the cortex, ultimately generating a smooth map of scanned space in cortical layer 2/3. In Chapter 3 I utilize a novel tactile display to better understand the logic of multi-whisker integration in two cortical layers. In this unpublished work, I show that contrary to the previous literature in anesthetized mice, cortical neurons in awake, whisking mice powerfully summate specific whisker combinations supralinearly, generating a sparse code representing the entire combinatoric space of whisker touch. In Chapter 4, I conclude with some closing thoughts and propose some future lines of inquiry to further this research.
Girlevicius, Lukas. "Active magnetic bearing driver circuit design featuring current measurement integration". Thesis, Uppsala universitet, Elektricitetslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-269215.
Texto completoBecker, Gina M. D. "Human Systems Integration Competency Development for Navy Systems Commands". Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/17322.
Texto completoThere is a growing need in defense acquisition to design timely, cost-effective competency development programs to facilitate qualifying new hires to replace a rapidly aging workforce. Navy Systems Commands (SYSCOMs), which are charged with system acquisition and sustainment, are engaged in Total Force Management strategies to support technical competency, development, and qualifications. This thesis examined a Competency Development Model constructed by Space and Naval Warfare Systems Command subject matter experts for Human System Integration (HSI) practitioners at four levels of their careers. The notional meta-competencies required by HSI practitioners were initially reviewed by 10 senior HSI acquisition professionals (representing each of the three major Navy SYSCOMs) and then 24 frontline supervisors to align them with the appropriate acquisition domain, validate the proper practitioner work level where the meta-competency was required, and identify the potential sources for meta-competency development. The results were then compiled for supervisory use in supporting HSI practitioner career development. In addition, an Individual Development Plan for front-line supervisors was constructed to support entry-level HSI employee development. It is asserted that this process can be used by other SYSCOM engineering competencies to identify requisite meta-competencies for practitioner career development and qualification.
Leimkuhler, Benedict y Sebastian Reich. "Symplectic integration of constrained Hamiltonian systems". Universität Potsdam, 1994. http://opus.kobv.de/ubp/volltexte/2007/1565/.
Texto completoHadjimichael, Basil. "Manufacturing execution systems integration and intelligence". Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82491.
Texto completoTvaryanas, Anthony P. "A discourse in human systems integration". Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/10571.
Texto completoLohith, Penmetsa Neela. "Monolithic 3D integration of asynchronous systems". Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53113.
Texto completoLiu, Kevin K. (Kevin Kaitan) 1986. "Cost estimation of human systems integration". Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59776.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (p. 103-108).
Human Systems Integration (HSI) is the interdisciplinary technical and management processes for integrating human considerations within and across all system elements. The goal of this research is to develop a better understanding of how the costs of doing HSI work within a program can be estimated. The research is divided into two parts. In the first part, problem formulation, literature from several relevant domains is first reviewed. Next a descriptive case study is conducted on the development of the Pratt and Whitney F 119 engine. It examines activities done to support HSI up to engineering and manufacturing development and concludes that, among other factors, HSI in requirements are a major driver of effort. This conclusion leads to work on the integration of HSI into the counting of requirements for an existing systems engineering cost model. In the second part of the research, implementation and validation, two workshops are conducted to assess how HSI considerations are addressed in real-world requirements engineering. The first workshop tests existing requirements counting guidelines, identifies weakness, and suggests improvement. The second workshop applies the Wideband Delphi method to generate consensus between stakeholders in order to deliver a quantitative estimate of HSI effort. The workshop also demonstrates that stakeholders perceive functional and nonfunctional requirements as driving effort in similar ways, a conclusion that challenges a widely-held belief that nonfunctional requirements are less significant than functional ones. The research done in the case study and workshops results in improvements to the existing systems engineering cost model, and an application of the model is presented. Policy considerations are discussed. The integration of the HSI into the model represents a significant step toward being better able to plan HSI effort in acquisition programs.
by Kevin K. Liu.
S.M.in Technology and Policy
Quiram, David J. "Characterization and systems integration of microreactors". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8272.
Texto completoIncludes bibliographical references.
Microfabrication technology presents the opportunity to create highly instrumented, micro-scale chemical reactors that bring with them the potential for new analytical capabilities, point-of-use synthesis, and highly parallel screening methods. However, the use of integrated circuit-like reaction devices, such as the MIT thin-film microreactor, also gives rise to a spectrum of new engineering challenges with respect to reactor system integration and scale-up schemes. This work demonstrates the integration of multiple microreactors operating in parallel within a system that includes gas flow control components and the associated electronic circuitry. The system built is equivalent to a conventional laboratory reactor system but in 1/10th of the space. Fluidic and electronic interfaces, thermal management, and operational safety are all considerations in microreactor packaging. A standard microchip socket from Texas Instruments was selected as the first level packaging. The sockets have mechanical attributes that lend them to, with minor reworking, simultaneous fluidic and electronic connection. This selection makes PC board mounting of the reactor devices straightforward. Shut-off microvalves and proportional microvalves from Redwood Microsystems, with their control electronics, have also been mounted on PC boards to control the gas flow in the system. This allows the entire system: reactors, device electronics, and gas distribution manifold to be mounted on standard CompactPCI cards and housed in a commercially available chassis. A Kaparel CompactPCI chassis is used to house the microreactor system.
Electrical connections between the boards are achieved through a standard backplane and custom-built rear I/O PC boards. The system is comprised of a temperature controller card that regulates temperature for auxiliary heaters in the system; a gas mixing board that mixes the feed gas for the microreactors; two microreactor boards that each contain two microreactors with their feed flow controllers; and two heater circuit boards that provide power to the microreactor heaters. A National Instruments embedded real time processor is used to provide closed-loop control and monitor system alarms. A host PC, running LabVIEW 6, is used as the human machine interface for operator interaction and historical data logging.
by David J. Quiram.
Ph.D.
Faltinsen, Stig. "Geometric integration of lie-poisson systems". Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621090.
Texto completoMinich, Matthias Ernst. "Industrialising software development in systems integration". Thesis, University of Plymouth, 2013. http://hdl.handle.net/10026.1/2772.
Texto completo