Now showing items 40-59 of 170

    • The effectiveness of a simple policy for coordinating inventory control and pricing strategies 

      Sun, Zhibo, S.M. Massachusetts Institute of Technology (Massachusetts Institute of Technology, 2010)
      We investigate the effectiveness of an (s, S, p) policy relative to an (s, S, A, p) policy in a single product, periodic review, finite horizon model with stochastic multiplicative demand and fixed ordering cost, in which ...
    • Efficient reduced-basis approximation of scalar nonlinear time-dependent convection-diffusion problems, and extension to compressible flow problems 

      Men, Han (Han Abby) (Massachusetts Institute of Technology, 2006)
      In this thesis, the reduced-basis method is applied to nonlinear time-dependent convection-diffusion parameterized partial differential equations (PDEs). A proper orthogonal decomposition (POD) procedure is used for the ...
    • Empirical comparison of robust, data driven and stochastic optimization 

      Wang, Yanbo, S.M. Massachusetts Institute of Technology (Massachusetts Institute of Technology, 2008)
      In this thesis, we compare computationally four methods for solving optimization problems under uncertainty: * Robust Optimization (RO) * Adaptive Robust Optimization (ARO) * Data Driven Optimization (DDO) * stochastic ...
    • Energy optimal path planning using stochastic dynamically orthogonal level set equations 

      Narayanan Subramani, Deepak (Massachusetts Institute of Technology, 2014)
      The growing use of autonomous underwater vehicles and underwater gliders for a variety of applications gives rise to new requirements in the operation of these vehicles. One such important requirement is optimization of ...
    • Enhancements and computational evaluation of the hit-and-run random walk on polyhedra 

      Liang, Jiajie, S.M. Massachusetts Institute of Technology (Massachusetts Institute of Technology, 2006)
      The symmetry function of a convex set offers us numerous useful information about the set in relation to probabilistic theory and geometric properties. The symmetry function is a measure of how symmetric the convex set is, ...
    • Evaluating Intrusion Detection Systems for Energy Diversion Attacks 

      Sethi, Abhishek Rajkumar (Massachusetts Institute of Technology, 2016)
      The widespread deployment of smart meters and ICT technologies is enabling continuous collection of high resolution data about consumption behavior and health of grid infrastructure. This has also spurred innovations in ...
    • Evaluation of cost balancing policies in multi-echelon stochastic inventory control problems 

      Yu, Qian, S.M. Massachusetts Institute of Technology (Massachusetts Institute of Technology, 2010)
      We study a periodic-reviewed, infinite horizon serial network inventory control problem. The demands in different periods are independent of each other and follow an identical Poisson distribution. Unsatisfied demands are ...
    • The Evolutionary Design Model (EDM) for the design of complex engineered systems : Masdar City as a case study 

      Alfaris, Anas (Anas Faris) (Massachusetts Institute of Technology, 2009)
      This thesis develops a framework for constructing an Evolutionary Design Model (EDM) that would enhance the design of complex systems through an efficient process. The framework proposed is generic and suggests a group of ...
    • Fairness and optimality in trading 

      Nguyen, Van Vinh, S.M. Massachusetts Institute of Technology (Massachusetts Institute of Technology, 2010)
      This thesis proposes a novel approach to address the issues of efficiency and fairness when multiple portfolios are rebalanced simultaneously. A fund manager who rebalances multiple portfolios needs to not only optimize ...
    • A fast 3D full-wave solver for nanophotonics 

      Zhang, Lei, Ph. D. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science. (Massachusetts Institute of Technology, 2007)
      Conventional fast integral equation solvers seem to be ideal approaches for simulating 3-D nanophotonic devices, as these devices are considered to be open structures, generating fields in both an interior channel and in ...
    • A fast enriched FEM for Poisson equations involving interfaces 

      Huynh, Thanh Le Ngoc (Massachusetts Institute of Technology, 2008)
      We develop a fast enriched finite element method for solving Poisson equations involving complex geometry interfaces by using regular Cartesian grids. The presence of interfaces is accounted for by developing suitable jump ...
    • Fully-kinetic PIC simulations for Hall-effect thrusters 

      Fox, Justin M., 1981- (Massachusetts Institute of Technology, 2007)
      In recent years, many groups have numerically modeled the near-anode region of a Hall thruster in attempts to better understand the associated physics of thruster operation. Originally, simulations assumed a continuum ...
    • Future characteristics of Offshore Support Vessels 

      Rose, Robin Sebastian Koske (Massachusetts Institute of Technology, 2011)
      The objective of this thesis is to examine trends in Offshore Support Vessel (OSV) design and determine the future characteristics of OSVs based on industry insight and supply chain models. Specifically, this thesis focuses ...
    • A generalized precorrected-FFT method for electromagnetic analysis 

      Leibman, Stephen Gerald (Massachusetts Institute of Technology, 2008)
      Boundary Element Methods (BEM) can be ideal approaches for simulating the behavior of physical systems in which the volumes have homogeneous properties. These, especially the so-called "fast" or "accelerated" BEM approaches ...
    • Graduate school introductory computational simulation course pedagogy 

      Proctor, Laura L. (Laura Lynne), 1975- (Massachusetts Institute of Technology, 2009)
      Numerical methods and algorithms have developed and matured vastly over the past three decades now that computational analysis can be performed on almost any personal computer. There is a need to be able to teach and present ...
    • Hierarchical Gaussian models for wind field estimation and path planning 

      Musolas Otaño, Antoni M. (Antoni Maria) (Massachusetts Institute of Technology, 2016)
      Improvements in technology, autonomy, and positioning mechanisms have greatly broadened the range of application of unmanned aerial vehicles. These vehicles are now being used in aerial photography, package delivery, ...
    • High-dimensional design space visualization for conceptual structural design 

      Mueller, Caitlin T (Massachusetts Institute of Technology, 2014)
      This thesis focuses on visualizing high-dimensional design spaces for early-stage design problems in structural engineering and related disciplines. The design space, which is defined as the n + 1-dimensional surface that ...
    • High-resolution simulation of pattern formation and coarsening dynamics in 3D convective mixing 

      Fu, Xiaojing, S.M. Massachusetts Institute of Technology (Massachusetts Institute of Technology, 2015)
      Geologic C0₂ sequestration is considered a promising tool to reduce anthropogenic C0₂ emissions while allowing continued use of fossil fuels for the current time. The process entails capturing C0₂ at point sources such as ...
    • Imaging biomarkers for Duchenne muscular dystrophy 

      Koppaka, Sisir (Massachusetts Institute of Technology, 2015)
      Duchenne muscular dystrophy (DMD) is the most common muscular dystrophy of childhood and affects 1 in 3600 male births. The disease is caused by mutations in the dystrophin gene leading to progressive muscle weakness which ...
    • Impact of carbon emission regulatory policies on the electricity market : a simulation study 

      Tiwari, Sandeep, S.M. Massachusetts Institute of Technology (Massachusetts Institute of Technology, 2010)
      With ever rising concerns regarding global warming and other dangerous effects of CO2 , there had been efforts to reduce CO2 emissions all around the world by adopting more efficient technologies and alternate green or ...