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 93 for “"The Dynamic Model"”.
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Exploring levels of quality of teaching based on the dynamic model in Taiwan: Constraints and perspectives
… Adjusting trainings sessions to teacher’s authentic needs is considered a crucial part of their professional development. To improve teachers’ teaching practice, the Ministry of Education and local educational departments in Taiwan not only publish a programme of seminars, but also hold a …
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A comparison of kinematic and dynamic schemes for calculating long-range atmospheric trajectories
Two numerical models, one kinematic and one dynamic, were created and compared in their ability to predict trajectories of atmospheric parcels over eight days. While kinematic models are more widely used due to their accuracy, dynamic models can be used pedagogically to visualize the balance of …
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Neural network modeling of the dynamics of autonomous underwater vehicles for Kalman filtering and improved localization
… operations and deep-sea explorations. One of the major challenges faced by these vehicles is localization i.e., the ability of these vehicles to identify their location with respect to a reference point. The kinematic Extended Kalman filters have been used in localization in a method known as …
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Modelo computacional da dinâmica da cadeia de suprimentos do commodity do café brasileiro
The Brazilian coffee industry faces new challenges, which can change the structure of production. The coffee market appears to be a complex dynamic system, with dominant negative feedbacks, as well as response delays, which generate oscillations. The dynamic models proposed in the literature for …
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Study of the compliance and system integration of bistable structures for use as actuation mechanisms in bioinspired adaptive systems
… are desirable for actuation mechanisms because they allow for the efficient use of actuators by reducing the power required to change and maintain equilibrium positions. There is currently an increased interest in compliant bistable structures, especially for use in the fields of soft robotics …
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Vibration control of flexible robot manipulators
This project presents the results of an investigation into the versatility and effectiveness of a vibration control technique for flexible robot manipulators. A two link flexible robotic arm is considered and the dynamic model of the system is derived using the finite element method.
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Stability and Vibration Analysis of Turning and Face Milling Processes
Experimental validation of the outputs of the dynamic model, namely the cutting forces, standard deviation of vibration, surface quality, and the stability of the machining processes, and the strategies used to machine a part with maximum material rate and/or minimum vibration is also presented.
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Reducing radiation dose for a linear slot scanning digital X-ray machine using a filtration technique
This study describes the development of a filtration technique applied to the Lodox Statscan linear slotscanning digital X-ray system to reduce radiation dose to paediatric patients whilst preserving diagnostic image quality. The Statscan is an FDA approved, commercially available digital X-ray …
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The Dynamic Journey: Insights into the Challenges and Facilitators Encountered in Implementing the Dynamic Approach to School Improvement
The research study presented in this dissertation provides insight into the process of implementing the dynamic model of school improvement from the perspective of the practitioners. The Dynamic Approach to School Improvement (DASI) is a theory-based and evidence-driven model designed by Creemers …
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Modeling and analysis of hybrid geothermal-solar thermal energy conversion systems
Innovative solar-geothermal hybrid energy conversion systems were developed for low enthalpy geothermal resources augmented with solar energy. The goal is to find cost-effective hybrid power cycles that take advantage of the potential synergies of solar thermal and geothermal resources. One aspect …
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Dynamics of oxygen penetration and diffusion into horse skeletal myoglobin revealed by quenching of zinc protoporphyrin IX fluorescence
… a number of globular proteins provided some of the early experimental evidence for conformational fluctuations in proteins. Gratton et al. (Biophysical J. 1984. 45:789-794) proposed a sequential two step model called the dynamic model for oxygen quenching of internally buried fluorophores in …
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Dynamic modeling and control strategies for a micro-CSP plant with thermal storage powered by the Organic Rankine cycle
… by scroll expander- generators with solar thermal collectors and storage can provide combined heat and power to underserved rural communities. Simulation of such systems is instrumental in optimizing their control strategy. However, most models developed so far operate at steady-state or …
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Dynamic model for space-time weather radar observation and nowcasting
A general framework of the dynamic model for space-time radar observations has been developed in the current research. There exist three difficulties in modeling spacetime radar observations: 1) high dimensionality due to the high-resolution radar measurements over a large area, 2) non-stationarity …
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Analysis of a Rotary Ultrasonic Motor for Application in Force-Feel Systems
… systems is carried out. Prior to simulation, the subsystems and contact mechanics needed to define the motor's equations of motion are discussed along with the pitfalls of modeling a USM. A mathematical model is assembled and simulated in MATLAB Simulink. Accompanying the dynamic model, a new …
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Dynamics of a Small Autonomous Underwater Vehicle That Tows a Large Payload
This thesis presents the derivation of the dynamic model of an autonomous underwater vehicle that tows a large payload. Our analysis is motivated by the fact that the payload is so large that it cannot be modeled by simply appending its dynamics to the dynamics of the autonomous underwater vehicle. …
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Dynamic Load Modeling from PSSE-Simulated Disturbance Data using Machine Learning
Load models have evolved from simple ZIP model to composite model that incorporates the transient dynamics of motor loads. This research utilizes the latest trend on Machine Learning and builds reliable and accurate composite load model. A composite load model is a combination of static (ZIP) model …
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Modélisation, simulation et contrôle d’un cycle de Rankine organique en régime dynamique.
Organic Rankine cycles (ORC) are thermodynamic cycles that allow the production of mechanical energy form low temperature heat source. Additionally, they are particularly suitable to small scale units. This work introduces the use of ORC to recover a variable flow rate and temperature heat source. …
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Maneuverability and heading control of compliant biomimetic swimming devices
… biomimetic design approaches that involve the use of complex mechanisms. The additional stealth, ruggedness, and efficiency of this approach means that such devices could perform important tasks such as reconnaissance and underwater mapping. Many of these applications also require high …
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Dynamics and control of a planar truss actuator
… large space structure technology have suggested the use of active control actuators integral to a structures' construction. The concept of a 3-D (triangular cross-sectioned) active truss is presented. The linear equations of motion for one plane of the truss are derived. A model for a generic …
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Determining Communications Resource Feasibility in a Tactical Communications Network
… algorithms are presented to determine if the mission as presented is feasible. The mathematical foundation of the problem is presented, and a "static" model to determine feasibility is shown. Further evolution of the algorithm into a "dynamic" model and the reasons for the more demanding …
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