Página 9 dos resultados de 100905 itens digitais encontrados em 0.142 segundos

‣ Communication complexity of distributed shortest path algorithms

Friedman, Daniel Uri
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: [4], 92 leaves; 4504939 bytes; 4504698 bytes; application/pdf; application/pdf
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by Daniel U. Friedman.; Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1979.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Includes bibliographical references.

‣ An emulator of an engine-car system by an engine-dynamometer system

Lee, Wing Hong
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 89 leaves; 3724771 bytes; 3724531 bytes; application/pdf; application/pdf
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by Wing Hong Lee.; Thesis (Elec.E)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Includes bibliographical references.

‣ Decentralized algorithms for optimization of single commodity flows

Castiñeyra Figueredo, Isidro Marcos
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 58 leaves; 3023242 bytes; 3022999 bytes; application/pdf; application/pdf
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by Isidro Marcos Castiñeyra Figueredo.; Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Includes bibliographical references.

‣ Analysis of optimal control of a four-gimbal system

Gennert, Michael Andrew
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 99 leaves; 5246339 bytes; 5246097 bytes; application/pdf; application/pdf
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by Michael Andrew Gennert.; Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Bibliography: leaf 99.

‣ Performance models of distributed database systems

Li, Victor On-Kwok
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 176 leaves; 8111047 bytes; 8110804 bytes; application/pdf; application/pdf
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by Victor On-Kwok Li.; Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1981.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Bibliography: leaves 174-176.

‣ Dynamic routing in an unreliable manufacturing network with limited storage

Hahne, Ellen Louise
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 242 leaves; 9808155 bytes; 9807670 bytes; application/pdf; application/pdf
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by Ellen Louise Hahne.; Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1981.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Bibliography: leaves 231-242.

‣ Design and evaluation of a programmable linkage array

Iverson, Ralph Benhart
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 158 leaves; 6664438 bytes; 6664199 bytes; application/pdf; application/pdf
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by Ralph Benhart Iverson.; Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1981.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Includes bibliographical references.

‣ A real-time ink correction module for Helio-engraving process

Mishra, Sudhindra Nath
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: [296] leaves; 17160344 bytes; 17160094 bytes; application/pdf; application/pdf
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by Sudhindra Nath Mishra.; Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1981.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Includes bibliographical references.

‣ A spelling error detection algorithm for the PDP11/03

Heller, Richard Michael
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 75 [i.e. 88] leaves; 5727377 bytes; 5727137 bytes; application/pdf; application/pdf
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by Richard Michael Heller.; Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1981.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Includes bibliographical references.

‣ Analysis and specification of office procedures

Kunin, Jay Stuart
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 232 leaves; 18798434 bytes; 18798193 bytes; application/pdf; application/pdf
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by Jay Stuart Kunin.; Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1982.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Bibliography: leaves 228-232.

‣ The design of a multiprocessor development system

Anderson, Thomas Lee
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 122 leaves; 7689991 bytes; 7689749 bytes; application/pdf; application/pdf
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by Thomas Lee Anderson.; Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1982.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Bibliography: leaves 119-122.

‣ Protocols for multi-access channels with continuous entry and noisy feedback

Cruz, Rene Leonardo
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: iv, 72 leaves; 2780886 bytes; 2780644 bytes; application/pdf; application/pdf
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by Rene Leonardo Cruz.; Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1982.; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Includes bibliographical references.

‣ Spatially adaptive multiwavelet representations on unstructured grids with applications to multidimensional computational modeling

Castrillón Candás, Julio E. (Julio Enrique)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 134 p.; 7288278 bytes; 7288037 bytes; application/pdf; application/pdf
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In this thesis, we develop wavelet surface wavelet representations for complex surfaces, with the goal of demonstrating their potential for 3D scientific and engineering computing applications. Surface wavelets were originally developed for representing geometric objects in a multiresolution format in computer graphics. However, we further extend the construction of surface wavelets and prove the existence of a large class of multiwavelets in Rn with vanishing moments around corners that are well suited for complex geometries. These wavelets share all of the major advantages of conventional wavelets, in that they provide an analysis tool for studying data, functions and operators at different scales. However, unlike conventional wavelets, which are restricted to uniform grids, surface wavelets have the power to perform signal processing operations on complex meshes, such as those encountered in finite element modeling. This motivates the study of surface wavelets as an efficient representation for the modeling and simulation of physical processes. We show how surface wavelets can be applied to partial differential equations, cast in the integral form. We analyze and implement the wavelet approach for a model 3D potential problem using a surface wavelet basis with linear interpolating properties.; (cont.) We show both theoretically and experimentally that an O(h2/n) convergence rate...

‣ Reduced-order modeling of MEMS using modal basis functions; Reduced-order modeling of microelectromechanical systems using modal basis functions

Varghese, Mathew, 1973-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 93 leaves; 7295972 bytes; 7295731 bytes; application/pdf; application/pdf
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The field of MEMS has matured significantly over the last two decades increasing in both complexity and level of integration. To keep up with the demands placed by these changes requires the development of computer-aided design and modeling tools (CAD/CAM) that enable designers to reduce the time and cost it takes to produce working prototypes. An ideal scenario is one in which a designer is able to quickly model and simulate an entire microsystem - sensors, actuators and electronics -- with the certainty that their results will match that of physical prototypes. This vision of design requires the existence of system level models of MEMS devices that can capture the complex non-linear coupling between multiple physical domains, yet be sufficiently fast and compact in form to insert into a system dynamics simulator. In this thesis I explore techniques of automatically constructing such models from meshed representations of device geometry. These dynamical models are known as "reduced-order" models or "macromodels." They are characterized by few degrees of freedom (DOF), and a small set of state equations. Our process for constructing macromodels is built upon two well-established methodologies - normal mode superposition and Lagrangian mechanics. This is referred to as the "CHURN process" and was originally developed by Gabbay et al. to create models of electromechanical devices with two electrodes under conditions satisfying linear mechanics.; (cont.) In this thesis I significantly extend this process to model multi-port magnetostatic devices...

‣ Stochastic processes on graphs with cycles : geometric and variational approaches

Wainwright, Martin J. (Martin James), 1973-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 271 leaves; 21824527 bytes; 21824286 bytes; application/pdf; application/pdf
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Stochastic processes defined on graphs arise in a tremendous variety of fields, including statistical physics, signal processing, computer vision, artificial intelligence, and information theory. The formalism of graphical models provides a useful language with which to formulate fundamental problems common to all of these fields, including estimation, model fitting, and sampling. For graphs without cycles, known as trees, all of these problems are relatively well-understood, and can be solved efficiently with algorithms whose complexity scales in a tractable manner with problem size. In contrast, these same problems present considerable challenges in general graphs with cycles. The focus of this thesis is the development and analysis of methods, both exact and approximate, for problems on graphs with cycles. Our contributions are in developing and analyzing techniques for estimation, as well as methods for computing upper and lower bounds on quantities of interest (e.g., marginal probabilities; partition functions). In order to do so, we make use of exponential representations of distributions, as well as insight from the associated information geometry and Legendre duality. Our results demonstrate the power of exponential representations for graphical models...

‣ BioJADE : a design and simulation tool for synthetic biological systems; Design and simulation tool for synthetic biological systems

Goler, Jonathan Ari, 1980-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 85 p.; 3341552 bytes; 3350832 bytes; application/pdf; application/pdf
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The next generations of both biological engineering and computer engineering demand that control be exerted at the molecular level. Creating, characterizing and controlling synthetic biological systems may provide us with the ability to build cells that are capable of a plethora of activities, from computation to synthesizing nanostructures. To develop these systems, we must have a set of tools not only for synthesizing systems, but also designing and simulating them. The BioJADE project provides a comprehensive, extensible design and simulation platform for synthetic biology. BioJADE is a graphical design tool built in Java, utilizing a database back end, and supports a range of simulations using an XML communication protocol. BioJADE currently supports a library of over 100 parts with which it can compile designs into actual DNA, and then generate synthesis instructions to build the physical parts. The BioJADE project contributes several tools to Synthetic Biology. BioJADE in itself is a powerful tool for synthetic biology designers. Additionally, we developed and now make use of a centralized BioBricks repository, which enables the sharing of BioBrick components between researchers, and vastly reduces the barriers to entry for aspiring Synthetic Biologists.; by Jonathan Ari Goler.; Thesis (M. Eng. and S.B.)--Massachusetts Institute of Technology...

‣ Multi-parametric numerical simulation of age-specific cancer rates in human populations

Kogel, John, 1981-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 138 p.; 6438586 bytes; 6455954 bytes; application/pdf; application/pdf
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The CancerFit computer program allows cancer researchers to analyze epidemiologic data describing the age-specific risk of cancer in terms of hypotheses about historical environmental risks, the heritability of cancer, the role of gender and the processes embedded in cancer formation. The program was based on the theories of Professor W. Thilly (MIT), Professor S. Morgenthaler (ETH) and their students. Written as a Fortran program by Prof. Morgenthaler it was transported into Java by David Hensle (MIT) who introduced a number of characteristics that enabled MIT students to perform basic parametric analyses for thesis and coursework in cancer epidemiology. In this thesis, the CancerFit application has been extended to include new functionality that allows computation and subsequent analysis of the ratio of two age-specific cancer incidence or mortality datasets. Originally this ratio was proposed to compare the lifetime risks of children of parents with a specific form of cancer and of parents with at least one child with the same cancer; it does this task as intended. However, its use has permitted me to discover a previously unrecognized excess of colon cancer deaths in women relative to men in the 30-64 year age interval. As this is the same age interval for early breast cancer and ovarian cancer onset in women...

‣ Building a trajectory syntax through language evolution

Kim, Anthony Hahn, 1980-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 82 leaves; 3357365 bytes; 3366134 bytes; application/pdf; application/pdf
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If we are to understand the innately human ability to solve complex problems, we must first understand the cognitive processes that allow us to combine different kinds of knowledge, to learn new things and to communicate with other people. I have built a computer simulation, based on the work of Simon Kirby, in which I show that a population of induction agents, capable of perceiving their environment and producing utterances, can develop a compositional grammar to describe the world they observe with no prior linguistic knowledge. This system expands the semantic domain proposed by Kirby which expressed meanings such as "John knows Pete" to a physical world of trajectories such as "The boy ran from the tree to the pole". In this new simulation, I demonstrate that a compositional syntax still develops if the level of semantic complexity increases over time. I then argue that using multiple representations decreases the time necessary for a compositional grammar to emerge.; by Anthony Hahn Kim.; Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.; Includes bibliographical references (leaves 81-82).

‣ A wireless, low power, asynchronous, multi-sensor, temperature network

Levy, Daniel M. G. H. (Daniel Matthew Guy Ho), 1979-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 101 leaves; 5114861 bytes; 5126539 bytes; application/pdf; application/pdf
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Wireless communication is not new. Radio and television broadcasting, as well as air traffic control have used wireless signals in their products for decades. The transmitters for these applications require large antennas and a lot of power to drive the signal to many receivers, certainly too much for any kind of battery to provide. However, a lot of new products today are moving toward wireless data transfer, and the majority of these require power levels low enough that they can run off of a battery. Examples include cellular phones, personal digital assistants, and ethernet cards for personal computers with the battery life ranging from a few hours to a few days. This thesis creates a low-power, battery-operated transmitter that reads the temperature from a sensor and then sends the data through an RF connection to a receiver, which then converts the information to human readable form. The transmitter can. perform a conversion about every minute and then go to sleep, allowing the battery to last for significantly longer than the wireless examples mentioned above. The temperature sensor system was developed and tested at the MIT High Voltage Research Laboratory. Low-power Motorola microcontrollers coded in assembly physically implement the transmitter receiver pair. A Dallas Semiconductor sensor performs the conversions...

‣ Wearable multiple sensor acquisition device; Multiple sensor acquisition board for wearable computing

Elledge, Christopher Lee, 1980-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 54 leaves; 1858282 bytes; 1862765 bytes; application/pdf; application/pdf
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The wearable multiple sensor acquisition device is targeted as the primary sensor hub for the next revision of the MIThril wearable computer architecture. The device provides 3-axis acceleration sensing, infrared transmission and reception of Tag IDs, and a 16kHz 8bit audio stream. To be usable for wearable applications, the WMSAD is contained in a 1.3" X 1.35" package and operates at 35mA at 5V, and meets the requirements imposed by these applications. The WMSAD will operate directly with the SAK2 to provide sensor data collection and recording.; by Christopher Lee Elledge.; Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.; Includes bibliographical references (leaf 54).