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 20 for “"Parameter Control"”.
-
Distributed Parameter Control of Thermal Fluids
We consider the problem of controlling a thermal convection flow by feedback. The system is governed by the Boussinesq approximation of the coupled set of Navier-Stokes and heat equations. The control is applied through Dirichlet boundary conditions. We concentrate on a two-dimensional mode and use …
-
Distributed parameter control of heat diffusion with solidification
… safely operating the caster. Yet most current control methods are effectively open-loop, due to the complicated nature of the process. Measurements of the steel temperature cannot be made reliably due to the high temperatures and constant water spray in the caster. Even if feedback could be …
-
Multi-parameter control for centrifugal compressor performance optimization
… angle and impeller speed to implement a multi-parameter control on a centrifugal compressor system is assessed. The assessment consists of first developing a one-dimensional meanline model for estimating performance of centrifugal compressor system followed by the formulation of a control …
-
Finite dimensional approximations of distributed parameter control systems
… to the development of finite dimensional control systems for approximating distributed parameter models. One method uses the “standard finite element” approximations to construct the basic system matrices. The resulting system can then be balanced by any of several balancing algorithms. …
-
A direct-write thick-film lithography process for multi-parameter control of tooling in continuous roll-to-roll microcontact printing
… been limited by the inability to monitor and control the process and the lack of a continuous large-area polymer tool that embodies micron- to nano-scale patterns currently created with wafer-based lithography. Discontinuities arising from a wrapped image carrier, size limitations from silicon …
-
Using Eye-tracking to Acknowledge Attended Alarms
A lack of alarm management for industrial control rooms has led to frequent alarm floods that have the potential to overwhelm operators within minutes. One approach to managing alarm floods would be altering the salience of alarms that operators might already notice, thereby reducing the disruption …
-
A performance analysis of a modified leaky bucket mechanism
Preventive congestion control is more effective and widely used than reactive control. It is usually implemented in two ways: Connection Admission Control (CAC) and Usage Parameter Control (UPC). Leaky bucket (LB) is a typically used UPC mechanism. A traditional LB can either police a bursty …
-
High dynamic range video merging, tone mapping, and real-time implementation
… problems of HDR video flicker and automated parameter control of the tone mapping operator. A prototype of this HDR video capture technique along with the combining and tone mapping algorithms have been implemented in a high-definition HDR-video system. Additionally, Field Programmable Gate …
-
A study of heuristic scheduling
… to 15 different problems. Precise despatching parameter control is applied to jobshop scheduling problems and the results presented in the form of reponse surfaces. The properties of the measured responses are examined using the techniques of Fourier and Walsh analysis and a model of 'regular' …
-
FOOD CONTROL: QUALITY ASSURANCE AND PROTECTION AGAINST ADULTERATION TECHNIQUES
… adulteration techniques, providing analytical parameter control from the local reference for the consumer protection. This PhD research was conducted almost entirely in agreement with the laboratory of Catania of Central Inspectorate Department of Protection and Prevention of Fraud quality of …
-
In-Silico design and verification of an extracorporeal normothermic cardiac perfusion system for use during heart transplantation procedures
… environment was established by adapting lumped parameter models and integrating computed tomography angiograms, facilitating both in-silico and coupled in-vitro validation analyses. This enabled the development of a bench testing model that replicated physiologically relevant coronary perfusion …
-
In-Silico design and verification of an extracorporeal normothermic cardiac perfusion system for use during heart transplantation procedures
… environment was established by adapting lumped parameter models and integrating computed tomography angiograms, facilitating both in-silico and coupled in-vitro validation analyses. This enabled the development of a bench testing model that replicated physiologically relevant coronary perfusion …
-
Output Regulation of Systems Governed by Delay Differential Equations: Approximations and Robustness
… regulation can be highly sensitive to system parameters and hence such designs are not always robust. In particular, when employing numerical approximations to delay systems, the resulting finite dimensional models inherit natural approximation errors that can impact robustness. This …
-
A fuzzy logic based approach to quality of service in 802.11b wireless networks
… of Service (QoS) are Connection Admission Control (CAC), Usage Parameter Control (UPC) and Multi-Priority Control (MPC). An increasing number of users are connecting to the Internet through Wireless Local Area Networks (WLANs). The most widespread standard for WLAN s is that defined in the …
-
Collaborative Visualization in the Grid Environment
… services together through a centralized controller service to create customized visualization pipelines according to their different requirements. Collaborative working is supported in both creating and steering of visualization pipelines. Visualization information is recorded as …
-
Landscape Aware Algorithm Configuration
The issue of parameter selection cannot be ignored if optimal performance is to be obtained from an algorithm on a specific problem or if a collection of algorithms are going to be compared in a fair manner. Unfortunately, adequately addressing the issue of parameter selection is time consuming and …
-
Performance analysis of an ATM network with multimedia traffic: a simulation study
Traffic and congestion control are important in enabling ATM networks to maintain the Quality of Service (QoS) required by end users. A Call Admission Control (CAC) strategy ensures that the network has sufficient resources available at the start of each call, but this does not prevent a traffic …
-
Synthesis, Properties and Applications of Micro/Nano Zinc Oxide Spheres
… is required in the industry. Meanwhile, the parameter control during the synthesis procedure is essential to be modified and clarified. The main focus of this thesis is on developing a simple, inexpensive, and solution based thermal method to grow spherical shaped ZnO particles having …
-
Design and Development of Force Control and Automation System for the VT-FRA Roller Rig
This study discusses the design of a force control strategy for reducing force disturbances in the Virginia Tech – Federal Railroad Administration (VT-FRA) Roller Rig. The VT-FRA Roller Rig is a state-of-the-art roller Rig for studying contact mechanics. It consists of a 0.2m diameter wheel and a …
-
Solving Large Scale Crew Pairing Problems
… column generation variants with sophisticated parameter control schemes into this approach. The computation time is reduced significantly by a factor of three. Moreover, the work also focuses on the extensibility of the methods. This is quite important for large scale problems. Then, we easily …