• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 13064
  • 7513
  • 3367
  • 2543
  • 1667
  • 1311
  • 1214
  • 322
  • 315
  • 273
  • 238
  • 206
  • 199
  • 171
  • 165
  • Tagged with
  • 39506
  • 6647
  • 4825
  • 3082
  • 2627
  • 2562
  • 2562
  • 2178
  • 1883
  • 1661
  • 1584
  • 1580
  • 1559
  • 1522
  • 1491
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Propuesta de un sistema de control de gestión para sociedad informática de Servicios Sermaluc Ltda

Isaacura López, Beatriz Elena 11 1900 (has links)
TESIS PARA OPTAR AL GRADO DE MAGÍSTER EN CONTROL DE GESTIÓN / La Unidad Estratégica de Negocios (UEN) foco de este estudio es la empresa Sociedad de Servicios Informáticos Sermaluc Limitada. Sermaluc nació como empresa de outsourcing en el año 2000 teniendo a CorpBanca como su primer cliente (Banco Concepción en ese entonces). Actualmente cuenta con una amplia y creciente cartera de clientes ligada principalmente a la Banca y al Retail y ha tenido la oportunidad de intervenir en diferentes áreas del negocio financiero, lo que hoy representa una consistente plataforma para proyectar sus servicios a otras empresas. Sermaluc está dedicada a la ingeniería de Software y cuenta con más de 20 años de experiencia en la entrega de soluciones tecnológicas a medida. Hoy en día no solo se enfoca en el desarrollo de nuevas soluciones de software, sino que ha ampliado su oferta a otros servicios tales como Soporte, Mantención y Aseguramiento de la Calidad, lo cual le permite abordar un amplio abanico de necesidad de su cartera de clientes. Sermaluc busca generar equipos de trabajos dotados de personal competente tanto técnico como analítico, capaces de entender el negocio de los clientes y abordar desde esa perspectiva los desafíos que ellos plantean (Sermaluc, 2015). Los servicios que Sermaluc entrega a sus clientes son:  Desarrollo de Software. Enfocado en ejecutar proyectos de desarrollo que generen soluciones bajo exigentes estándares de calidad.  Soporte y mantención de software. Tiene el objetivo de mantener la continuidad de las aplicaciones que soportan el negocio de las empresas. Terminología asociada a Ingeniería de Software:  Ingeniería de Software: es el estudio y aplicación de principios y metodologías para el diseño, desarrollo y mantenimiento de software.  Desarrollo de Software: es la realización sistemática de las actividades de planeación, diseño, codificación, pruebas y lanzamiento de productos de software nuevos cumpliendo con los requisitos especificados y con las normativas de seguridad de información.  Mantenimiento de software: es la modificación de un producto de software después de la entrega, para corregir errores, mejorar el rendimiento, u otros atributos. Es una de las actividades más comunes en la ingeniería de software. Sermaluc cuenta actualmente con más de 200 personas con distintos perfiles y competencias técnicas apoyando en diversas áreas de negocio.
32

Design of Model Reference Adaptive Tracking Controllers for Mismatched Uncertain Dynamic Systems

Chang, Chao-Chin 17 July 2002 (has links)
Based on the Lyapunov stability theorem, an optimal model reference adaptive control (OMRAC) scheme with perturbation estimation is presented in this thesis to solve robust tracking problems. The plant considered belongs to a class of MIMO perturbed dynamic systems with input nonlinearity and time varying delay in the state. The proposed control scheme contains three types of controllers. The first one is a linear feedback controller, which is an optimal controller if there is no perturbation. The second one is an adaptive controller, it is used for adapting the unknown upper bound of perturbation estimation error. The last one is the perturbation estimation mechanism. The property of uniformly ultimately boundness is proved under the proposed control scheme, and the effects of each design parameter on the dynamic performance is analyzed. Two numerical examples are given for demonstrating the feasibility of the proposed methodology.
33

Environmental control systems (HVAC) in the architectural context

Jain, Alka Pancholy. January 1982 (has links)
No description available.
34

Model based design of decentralized control configurations

Schmidt, Henning January 2002 (has links)
No description available.
35

Model based design of decentralized control configurations

Schmidt, Henning January 2002 (has links)
No description available.
36

Economic assessment on the synthesis of optimising control schemes

Gannavarapu, Chandrasekhar. January 1991 (has links)
Thesis (Ph. D.)--University of Sydney, 1992. / Includes tables. Bibliography: leaves 401-409. Also available in print form.
37

The development and analysis of quality control adjustment schemes for process regulation

Rohani, Jafri Mohd. January 1995 (has links)
Thesis (M.S.)--Ohio University, June, 1995. / Title from PDF t.p.
38

Social, Personal, and Environmental Influences on Self-Control

vanDellen, Michelle January 2008 (has links)
Thesis (Ph. D.)--Duke University, 2008. / Includes bibliographical references.
39

Chattering suppression in sliding mode control system

Lee, Hoon, January 2007 (has links)
Thesis (Ph. D.)--Ohio State University, 2007. / Title from first page of PDF file. Includes bibliographical references (p. 131-136).
40

Extensions in non-minimal state-space and state-dependent parameter model based control with application to a DC-DC boost converter

Hitzemann, U. January 2013 (has links)
This Thesis is concerned with model-based control, where models of linear nonminimal state-space (NMSS) and nonlinear state-dependent parameter (SDP) form are considered. In particular, the focus is on model-based predictive control (MPC) in conjunction with the linear NMSS model and on proportional-integralplus (PIP) pole-assignment control in conjunction with the SDP model. The SDP-PIP pole-assignment controller is based on a nonlinear SDP model, however, the approach uses a linear pole-assignment controller design technique. This ‘potential paradox’ is addressed in this Thesis. A conceptual approach to realising the SDP-PIP pole-assignment control is proposed, where an additional conceptual time-shift operator is introduced. This allows the SDPPIP, at each sampling time instance, to be considered as an equivalent linear controller, while operating, in fact, in a nonlinear overall context. Additionally, an attempt to realise SDP-PIP control, where the SDP model exhibits equivalent linear system numerator zeros, is proposed. Regarding the NMSS MPC, emphasis is on square, i.e. equal number of inputs and outputs, multi-input multi-output (MIMO) modelled systems, which exhibit system output cross-coupling effects. Moreover, the NMSS MPC in incremental input form and making use of an integral-of-errors state variable, is considered. A strategy is proposed, that allows decoupling of the system outputs by diagonalising the closed-loop system model via an input transformation. A modification to the NMSS MPC in incremental input form is proposed such that the transformed system input - system output pairs can be considered individually, which allows the control and prediction horizons to be assigned to the individual pairs separately. This modification allows imposed constraints to be accommodated such that the cross-coupling effects do not re-emerge. A practical example is presented, namely, a DC-DC boost converter operating in discontinuous conduction mode (DCM), for which a SDP model is developed. This model is based on measured input-output data rather than on physical relationships. The model incorporates the output current so that the requirements for the load, driven by the converter, is constrained to remain within a predefined output current range. The proposed SDP model is compared to an alternative nonlinear Hammerstein-bilinear structured (HBS) model. The HBS model is, in a similar manner to the SDP model, also based on measured input-output data. Moreover, the differences as well as the similarities of the SDP and HBS model are elaborated. Furthermore, SDP-PIP pole-assignment control, based on the developed SDP model, is applied to the converter and the performance is compared to baseline linear PIP control schemes.

Page generated in 0.0751 seconds