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 117 for “"mdp"”.
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MDP-based Vehicular Network Connectivity Model for VCC Management
… We propose an markov-decisision process (MDP) model to track vehicles' connection status and estimate their reliability for data transmissions. Also, from analyses, we observed that higher vehicle connectivity presents a trace of repeated connection patterns. We reinforce the connectivity …
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A constrained MDP-based vertical handoff decision algorithm for wireless networks
The 4th generation wireless communication systems aim to provide users with the convenience of seamless roaming among heterogeneous wireless access networks. To achieve this goal, the support of vertical handoff is important in mobility management. This thesis focuses on the vertical handoff …
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Simultaneous ⁹⁹m̳Tc-MDP/¹²³I-MIBG imaging of neuroblastoma using SPECT-CT
Simultaneous ⁹⁹m̳̳Tc-MDP/ ¹²³I-MIBG SPECT has the potential to replace current clinical sequential acquisitions of ⁹⁹m̳Tc-MDP and ¹²³-MIBG SPECT studies, and therefore has great potential to reduce imaging time, sedation time, and injection dose on patients with neuroblastoma. Simultaneous …
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Werkstoffkundliche Untersuchung von Polymer-infiltrierten tetrapodalen Zinkoxidnetzwerken unter Einfluss eines MDP-haltigen Primer und reinen Polymeren
Ziel dieser Arbeit war es, die Materialeigenschaften von polymerinfiltrierten Zinkoxid-Netzwerken zu untersuchen sowie den Einfluss einer Behandlung des Netzwerks mit einem phosphathaltigen Monomer-Primer vor der Polymerinfiltration zu bewerten. Insgesamt wurden 148 Zinkoxid-Netzwerk-Proben …
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The Influence of Dietary Flavanol Mean Degrees of Polymerization on Sensory Preference Trends and the Metabolic Syndrome
… how the mean degrees of polymerization (mDP), or average compound size, impacts the health benefits. Moreover, it is known that flavanol mDP influences the sensory attributes of flavanol-rich foods including bitterness and astringency. It is known that obesity and sensitivity to …
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In vitro comparison of methylene diphosphonate radiopharmaceuticals
… radiopharmaceutical methylene diphosphonate (MDP) is a relatively new diagnostic tool and currently in widespread use as a gone imaging agent to delineate areas of altered osteogenesis. MDP is chelated with radioactive technetium-99m (Tc99m) and injected into the venous system of the body. It …
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Cooperative communications in wireless networks : novel approaches in the mac layer
… we design a novel Markov decision process (MDP) framework for the cooperative retransmission problem in the wireless networks. This MDP model is proven to be simple, yet very efficient approach for distributed optimization and decision making in the cooperation problem. We show that the …
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Acceleration of Iterative Methods for Markov Decision Processes
… research focuses on Markov Decision Processes (MDP). MDP is one of the most important and challenging areas of Operations Research. Every day people make many decisions: today's decisions impact tomorrow's and tomorrow's will impact the ones made the day after. Problems in Engineering, Science, …
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Solving Dec-MDPs with options and intention recognition
… problem. Rather than directly solving the Dec-MDP, which is NEXP-Complete, we instead solve a set of single-agent MDPs, that we can solve in P-Complete, and combine these solutions during execution time. We tested our algorithm on several instances of the Bribed Package Retrieval Problem and we …
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An Invisible Issue of Task Underspecification in Deep Reinforcement Learning Evaluations
… selected point Markov decision processes (point MDPs), stemming from task underspecification. A large class of DRL tasks, particularly in real-world decision problems, induce a family of MDPs, which---perhaps confusingly---each has the same high-level problem definition. As a demonstrative …
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Tensor decomposition and parallelization of Markov Decision Processes
Markov Decision Processes (MDPs) with large state spaces arise frequently when applied to real world problems. Optimal solutions to such problems exist, but may not be computationally tractable, as the required processing scales exponentially with the number of states. Unsurprisingly, investigating …
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Creation of a Cognitive Radar with Machine Learning: Simulation and Implementation
… radar environment as a Markov Decision Process (MDP), and then apply Deep-Q Learning to optimize radar performance. The radar environment includes a single point target and a communications system that will potentially interfere with the radar. We demonstrate that the Deep-Q Network (DQN) we …
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Hazard avoidance alerting with Markov decision processes
… (incident rate and unnecessary alert rate), the MDP-based logic can meet or exceed that of alternate logics.
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Innate Immunity in Chickens: In Vivo Responses to Different Pathogen Associated Molecular Patterns
… the structural motif PGN common to all bacteria, MDP the smallest immunostimulatory unit of PGN, and poly I:C the dsRNA analog. PAMP recognition by and stimulation of the innate immune system is crucial to an individual’s ability to quickly limit microbial growth and stimulate the adaptive immune …
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Resource allocation problems in stochastic sequential decision making
… times. We formulate a Markov Decision Process (MDP) for this problem. The features of partial observability and limited communication impose additional computational constraints on the exact solution of the MDP. We propose a scheme for approximating the optimal Q function and the optimal value …
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Towards practical theory : Bayesian optimization and optimal exploration
… and some learning algorithms (e.g., PAC-MDP algorithms). For Bayesian optimization, this work solves an open problem and achieves an exponential convergence rate. For learning algorithms, this thesis proposes a new analysis framework, called PACRMDP, and improves the previous theoretical …
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Efficient planning for near-optimal contact-rich control under uncertainty
… problem complexity. We develop the composite MDP algorithm based on this idea and show that it performs comparably to full MDP solutions at a fraction of the computational cost. However, the composite MDP still requires minutes to hours of computation, which is unsuitable for robots operating …
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Fast approximate hierarchical solution of MDPs
… models of large Markov decision processes (MDPs). As the size of the MDP increases, finding an exact solution becomes intractable, so we expect only to find an approximate solution. We also assume that the hierarchies we create are not necessarily applicable to more than one problem so that …
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Relación entre la movilidad diafragmática media por ecografía y el descenso de la hipercapnia en pacientes con ventilación mecánica no invasiva.
… de la cúpula del diafragma y otra indirecta (MDP) mediante la medición del desplazamiento de la rama izquierda de la vena porta entre la inspiración y la espiración. Resultados: A los 15 minutos, la MDD aumentó una media de 2,5 mm y la MDP de 2,43 mm. A la hora, la MDD aumentó una media 6,2 …
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Time-dependence in Markovian decision processes.
… processes, including Markov decision processes (MDPs) and semi-Markov decision processes (SMDPs), time-homogeneous or otherwise. We then formulate a simple decision process with exponential state transitions and solve this decision process using two separate techniques. The first technique solves …
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