Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 27 for “"lumping"”.
-
Solution of Large Markov Models Using Lumping Techniques and Symbolic Data Structures
… we have developed the fastest known CTMC lumping algorithm with the running time of O (m log n), where n and m are the number of states and non-zero entries of the generator matrix of the CTMC, respectively. We have also combined the use of symbolic data structures with state-lumping …
-
THE EFFECTIVENESS OF WIDE COLUMN LUMPING METHOD FOR PRELIMINARY DESIGN OF HIGH-RISE BUILDING
… from the initial design process. At present, lumping technique has been used to simplify a frame structural model by lumping a number of typical floors into a single floor. However, this method is available for frame structure . with column and beam members. It cannot be applied to structure …
-
ΕΠΙΛΥΣΗ ΠΡΟΒΛΗΜΑΤΩΝ ΚΙΝΗΣΗΣ ΤΟΥ ΕΔΑΦΙΚΟΥ ΝΕΡΟΥ ΚΑΙ ΤΩΝ ΔΙΑΛΥΜΕΝΩΝ ΟΥΣΙΩΝ ΜΕ ΜΕΘΟΔΟΥΣ ΠΕΠΕΡΑΣΜΕΝΩΝ ΣΤΟΙΧΕΙΩΝ
… THE STANDARD GALERKIN METHOD (SGM), B) THE MASS LUMPING FINITE ELEMENT METHOD (MLGM), C) THE SIMPLE MASS LUMPING FINITE ELEMENT METHOD (SMLGM) AND D) THE DISCONTINUOUS GALERKIN OR PETROV-GALERKIN METHOD (PGM). IN ALLTHESE COMPUTATIONAL SCHEMES ONE DIMENSIONAL LINEAR ELEMENT IS USED. (SHORTENED)
-
Lumped approach for sorption of organic contaminant mixtures to simulated aquifer sorbents
… evaluated on the basis of experimentally derived lumping criteria (i.e., Freundlich sorption parameters). Also, the use of the ideal adsorbed solution theory (IAST) with the determined pseudocompounds for predicting the sorption of the 12 NOCs within complex mixtures to simulated aquifer sorbents …
-
Markov Approximations: The Characterization of Undermodeling Errors
… this further allows us to explore integer lumping and to present a new way named weighted lumping to find realizations. We also show that best approximations of order strictly less than that of a minimal realization are truly approximations; they are incapable of mimicking the true system …
-
Enabling automatic generation of accurate kinetic models for complicated chemical systems
… the years we have seen formulation of various lumping strategies.
-
A Computational and Experimental Examination of the FCC Incentive Auction
… to reduce the number of rounds per auction by lumping similar spectrum licenses together. However, the IFA discourages straightforward bidding strategies and can result in bidders committing more in costs than their established budgets will allow.</p> <p>These mechanisms are compared using two …
-
A 3-dimensional h-adaptive algorithm for species transport prediction
… integration scheme which employs mass lumping, Cholesky skyline L-U decomposition, and Petrov-Galerkin upwinding; This thesis introduces and explains the Galerkin weighted residual finite element solution process with the use of the Laplace heat conduction equation. Development of the …
-
Covolume-Upwind Finite Volume Approximations For Linear Elliptic Partial Differential Equations
… Two types of discretization schemes with mass lumping are developed, using bilinear or biquadratic basis functions as the trial space respectively. Some stability analysis of the schemes are presented for the model problem with constant coefficients. Various examples in both two dimensions and …
-
Integrating nonlinear mixed effects and physiologically–based modeling approaches for the analysis of repeated measurement studies
… is described. Using the EM algorithm and the lumping methodology by Pilari2010, a new approach on how PBPK and NLME modeling can be combined is presented and exemplified for the antibiotic levofloxacin. Therein, the lumping identifies which processes are informed by the available data and the …
-
The self and self-conscious theatre on the Renaissance stage
… self-consciously theatrical structures without lumping together or oversimplifying their effects with each chapter focusing on a particular facet of self-conscious theatre to demonstrate the different kinds of self-consciousness that the plays produce and engage with. The thesis brings external …
-
Some aspects of the analysis of offshore structures
… by evaluating the forces 'consistently' and by 'lumping' them at element nodal points.<br/><br/>In addition, a comparison is made of solution methods which ignore certain cross-correlation terms in the equations of motion for the response with one that includes such terms, in an attempt to show …
-
The Response of an Oil Rig Model to Dynamic Excitation
… element technique and using the concept of lumping the masses of the elements at the nodes, were carried out to establish the vibration characteristics (natural frequencies and modal shapes) of the rig structure. The analytical investigations were repeated for the rig structure, in which …
-
Refugee women’s access to and use of emergency contraceptives as a reproductive health right in Kenya
… to emergency contraceptives for refugee women. Lumping all women in one category leads to limitations in advancing this right as it fails to consider the unique barriers and challenges refugee women face.
-
An approach of compartmentalisation in development of non-isothermal chemical reactor network models for the high speed simulation of iso-octane combustion
… of combustion steps in a few elementary steps by lumping species. The reduced kinetic model used in this study consists of a five-step mechanism involving four pseudo species. The thermodynamic properties of the pseudo species in the system were regressed against experimental data and successfully …
-
Low-dimensional Models for Real-time Simulation of Internal Combustion Engines and Catalytic After-treatment Systems
… the axial length and simplified chemistry by lumping the oxidants and the reductants. The model performance is tested and validated using data on actual vehicle emissions resulting in good agreement. The computational efficiency and the ability of the model to predict fractional oxidation …
-
Influence of the Gravity System on the Seismic Performance of Special Steel Moment Frames
… columns, difference between the explicit and lumping column approach, and required gravity column's splices to provide continuity. The stiffness of the element representing the gravity columns was varied in order to find the influence of the gravity columns. At the end of the study it was …
-
Matrix-free time-domain methods for general electromagnetic analysis
… No dual mesh, interpolation, projection and mass lumping are needed. Furthermore, a time-marching scheme is developed to ensure the stability for simulating an unsymmetrical numerical system, while preserving the matrix-free merit of the proposed method. This time-marching scheme is then made …
-
Time-Averaging and Morphology: Variability in Modern Populations and Fossil Assemblages of Mercenaria (Bivalvia)
… time spans exceeding 100's to 1000's of years. Lumping geographically separated samples and samples of different species also increases variability. Morphologic stasis is evident in Mercenaria over 100's to 1000's of years, but previous studies have indicated that evolutionary rates over this …
-
Predictive Modeling of Large-Scale Integrated Refinery Reaction and Fractionation Systems from Plant Data: Fluid Catalytic Cracking (FCC) and Continuous Catalyst Regeneration (CCR) Catalytic Reforming Processes
… and primary product fractionation; (3) feed lumping from limited feed information; (4) detailed procedure for kinetic model calibration; (5) industrially relevant case studies that highlight the effects of changes in key process variables; and (6) application of the model to refinery-wide …
Page 1 of 2