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.
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Showing 1 to 20 of 2082 for “"batch"”.
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Modelling of batch and fed-batch ethanol fermentation
Two series of batch and fed-batch fermentations were carried out using S.cerevisiae in a semi-defined medium containing 200 gl-1 glucose as limiting substrate. Growth rates were calculated and the data used to test the applicability of eight empirical kinetic models. The form proposed by …
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Batch Continuous-Time Trajectory Estimation
… state estimation and demonstrate their use in a batch, continuous-time trajectory estimation framework. We also present a novel outlier rejection scheme that uses a constant-velocity model to account for motion distortion. The core algorithms are validated using data from a two-axis scanning …
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Parallel Batch-Dynamic 𝑘d-trees
… In this paper, we present BDL-tree, a parallel, batch-dynamic implementation of a 𝑘d-tree that allows for efficient parallel 𝑘-NN queries over dynamically changing point sets. BDL-trees consist of a log-structured set of 𝑘d-trees which can be used to efficiently insert or delete batches of points …
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A Graphical Language for Batch Control
… control is presented and its application to batch control is examined and discussed. The name of the language is Grafchart. Its main feature is that it makes it possible to express complicated control problems in a compact and intuitive manner.Grafchart exists in two versions; a basic version …
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Mathematical modelling in batch emulsion polymerization
… out at 50°C in a stainless steel, stirred batch reactor of 3.63 dam capacity. The reactor was fitted with a temperature control facility and could be operated with or without internal baffles. A mathematical model covering stages I,II and III of emulsion polymerisation has been proposed and …
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Optimal control of fed-batch fermentation processes
Optimisation of a fed-batch fermentation process typically uses the calculus of variations or Pontryagin's maximum principle to determine an optimal feed rate profile. This often results in a singular control problem and an open loop control structure. The singular feed rate is the optimal feed …
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Batch separation of tetrafluoroethylene, hexafluoropropylene and octafluorocyclobutane
… details research aimed at designing a small batch distillation column to purify tetrafluoroethylene and hexafluoropropylene from a mixture containing tetrafluoroethylene, hexafluoropropylene and octafluorocyclobutane. As no vapour-liquid equilibrium data are available for these chemicals in …
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Exception Handling in Recipe-Based Batch Control
… thesis is exception handling in recipe-based batch control. Exception handling is a critical element for achieving long-term success in batch production. It is reported to constitute 40-60 percent of the batch control design and implementation effort. Correct handling of exceptions is a key …
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Bioreaction and separation in batch chromatographic columns
… been to study the behaviour and performance of a batch chromatographic column under simultaneous bioreaction and separation conditions for several carbohydrate feedstocks. Four bioreactions were chosen, namely the hydrolysis of sucrose to glucose and fructose using the enzyme invertase, the …
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Simulation and Optimization of Batch Crystallization Processes
… the robust optimal identification and control of batch and semibatch processes. The procedure uses a small number of batch experiments to identify the kinetic parameters and to quantify the parametric uncertainty for multidimensional crystallization processes. Analysis tools are developed which …
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Optimal design and operation of batch processes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1990.
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Reducing process variability in chemical batch manufacturing
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1992 and Thesis (M.S.)--Sloan School of Management, 1992.
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Heat transfer in a batch fluidized bed
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1953
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Real time automation for batch sampling analysis
The automation of continuous flow batch sampling analysis is discussed, and methods for data acquisition and analysis are developed. The application program which realizes the system objectives is outlined. The design includes extensive sample management capability, the use of peak shape …
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Dynamic Modelling and Optimization of Polymerization Processes in Batch and Semi-batch Reactors. Dynamic Modelling and Optimization of Bulk Polymerization of Styrene, Solution Polymerization of MMA and Emulsion Copolymerization of Styrene and MMA in Batch and Semi-batch Reactors using Control Vector Parameterization Techniques.
… emulsion copolymerization of Styrene and MMA in batch and semi-batch reactors are the focus of this work. In this work, models are presented as sets of differential-algebraic equations describing the process. Different optimization problems such as (a) maximum conversion (Xn), (b) maximum number …
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Perturbation-based Control of Industrial Fed-batch Bioprocesses
… control of industrial-scale microbial fed-batch bioprocesses. Its focus is therefore on methods which are easy to implement in an industrial setting, which gives certain limitations on sensors, actuators and control systems. The main part of the work in the thesis concerns control of the …
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CO-steam coal liquefaction in a batch reactor
Includes bibliographical references.
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Small-Scale Batch-Fed Biomass Gasification and Combustion
… The second and third studies focus on the batch-fed thermochemical biomass conversion process within the solid fuel bed. Specifically, the focus is the influence of an increasing fuel bed depth, thus an increasing char layer thickness to facilitate tar conversion, and the utilisation of …
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Synthesis of batch processes with integrated solvent recovery
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1997.
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Rate-1 non-interactive arguments for batch-NP
Succinct non-interactive arguments for batch-NP computations, called BARGs (Choudhuri, Jain and Jin, STOC 2021), have emerged as a powerful tool to construct succinct non-interactive arguments (SNARGs) for expressive classes of computations such as all deterministic computations (P), time-space …
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