97 research outputs found
Model predictive temperature control of a screw extruder
No full textDie vorliegende Arbeit beschäftigt sich mit der modellprädiktiven Regelung (MPC = Model Predictive Control) der Temperaturen eines Schneckenextruders. Die Aufgabe eines Extruders ist es, aus dem eingefüllten Granulat eine Schmelze zu erzeugen und fördert diese für die Verarbeitung zur nächsten Maschine. Dafür wurde ein thermisches Modell herangezogen, welches mittels Finite-Volumina-Methode hergeleitet wurde. Mit Hilfe dieser Regelung wird nun die Temperatur des Extruderzylinders auf eine vorgegebene Temperatur gebracht, um ein qualitatives Produkt zu erhalten. Da bei einem MPC stets eine Optimierungsaufgabe im Hintergrund gelöst wird, wird zuerst die vorliegende Problemstellung analysiert und untersucht, um festzustellen, welches Optimierungsverfahren mit der dazugehörigen Gütefunktion und den Nebenbedingungen zum gewünschten Ziel führt. Danach wird eine passende Softwarebibliothek zur Lösung der entsprechenden Optimierungsaufgabe gefunden, damit eine simulative Analyse und eine Implementierung auf einer Hardware möglich wird. Nach der Analyse in einer Simulationsumgebung wird der Regler an einem Workstation-PC mit Echtzeit-Patch mit der Programmiersprache C++ realisiert und getestet. Abschließend wird anhand Extrusionsexperimente an dem industriellen Extruder der modellprädiktive Regler validiert und mit dem bereits implementierten Regler verglichen.This thesis deals with the model predictive control (MPC) of the temperatures of a screw extruder. The task of an extruder is to produce a melt from the filled granulate and conveys it to the next machine for processing. For this purpose, a thermal model was used, which was derived using the finite volume method. With the help of this control, the temperature of the extruder cylinder is now brought to a specified temperature in order to obtain a qualitative product. Since there is always an optimisation task being solved in the background of an MPC, the problem at hand is first analyzed and investigated to determine which optimisation method with the associated quality function and constraints leads to the desired goal. Afterwards, a suitable software library for solving the corresponding optimisation task is found so that a simulative analysis and an implementation on a hardware becomes possible. After the analysis in a simulation environment, the controller is implemented using the programming language C++ and tested on a workstation PC with real-time patch. Finally, the model predictive controller is validated by using extrusion experiments on the industrial extruder and compared with the already implemented controller.eingereicht von Samet Taskiran, BScAbweichender Titel laut Übersetzung der Verfasserin/des VerfassersMasterarbeit Universität Linz 202
Model predictive temperature control of a screw extruder
No full textDie vorliegende Arbeit beschäftigt sich mit der modellprädiktiven Regelung (MPC = Model Predictive Control) der Temperaturen eines Schneckenextruders. Die Aufgabe eines Extruders ist es, aus dem eingefüllten Granulat eine Schmelze zu erzeugen und fördert diese für die Verarbeitung zur nächsten Maschine. Dafür wurde ein thermisches Modell herangezogen, welches mittels Finite-Volumina-Methode hergeleitet wurde. Mit Hilfe dieser Regelung wird nun die Temperatur des Extruderzylinders auf eine vorgegebene Temperatur gebracht, um ein qualitatives Produkt zu erhalten. Da bei einem MPC stets eine Optimierungsaufgabe im Hintergrund gelöst wird, wird zuerst die vorliegende Problemstellung analysiert und untersucht, um festzustellen, welches Optimierungsverfahren mit der dazugehörigen Gütefunktion und den Nebenbedingungen zum gewünschten Ziel führt. Danach wird eine passende Softwarebibliothek zur Lösung der entsprechenden Optimierungsaufgabe gefunden, damit eine simulative Analyse und eine Implementierung auf einer Hardware möglich wird. Nach der Analyse in einer Simulationsumgebung wird der Regler an einem Workstation-PC mit Echtzeit-Patch mit der Programmiersprache C++ realisiert und getestet. Abschließend wird anhand Extrusionsexperimente an dem industriellen Extruder der modellprädiktive Regler validiert und mit dem bereits implementierten Regler verglichen.This thesis deals with the model predictive control (MPC) of the temperatures of a screw extruder. The task of an extruder is to produce a melt from the filled granulate and conveys it to the next machine for processing. For this purpose, a thermal model was used, which was derived using the finite volume method. With the help of this control, the temperature of the extruder cylinder is now brought to a specified temperature in order to obtain a qualitative product. Since there is always an optimisation task being solved in the background of an MPC, the problem at hand is first analyzed and investigated to determine which optimisation method with the associated quality function and constraints leads to the desired goal. Afterwards, a suitable software library for solving the corresponding optimisation task is found so that a simulative analysis and an implementation on a hardware becomes possible. After the analysis in a simulation environment, the controller is implemented using the programming language C++ and tested on a workstation PC with real-time patch. Finally, the model predictive controller is validated by using extrusion experiments on the industrial extruder and compared with the already implemented controller.eingereicht von Samet Taskiran, BScAbweichender Titel laut Übersetzung der Verfasserin/des VerfassersMasterarbeit Universität Linz 202
Pseudo Picard Operators On Generalized Metric Spaces
No full textAltun, Ishak/0000-0002-7967-0554; Samet, Bessem/0000-0002-6769-3417In this paper, we present a new class of pseudo Picard operators in the setting of generalized metric spaces introduced recently in [M. JLELI AND B. SAMET: A generalized metric space and related fixed point theorems, Fixed Point Theory Appl., (2015) 2015:61]. An example is provided to illustrate the main result.Deanship of Scientific Research at King Saud UniversityDeanship of Scientific Research at King Saud University [RGP-237]The second author extends his appreciation to the Deanship of Scientific Research at King Saud University for funding this work through research group No RGP-237
Meir-Keeler Type Contractions on Js-Metric Spaces and Related Fixed Point Theorems
No full textKARAPINAR, ERDAL/0000-0002-6798-3254We introduce two classes of Meir-Keeler type contractions in the framework of JS-metric spaces introduced by Jleli and Samet (2015). For each class, a fixed point result is derived. Some interesting consequences which follow from our obtained results are discussed.King Saud University (Saudi Arabia)The second author extends his appreciation to Distinguished Scientist Fellowship Program (DSFP) at King Saud University (Saudi Arabia)
Espor : Türkiye’de alternatif hayran araştırması
No full textCataloged from PDF version of article.Includes bibliographical references (leaves 76-80).A fan can be anyone who has both potential media consumer and producer. Fandom
as we call, is a community of fans interested in a specific media context such as
actor, author or TV series. This study is about the developing fandom around
eSports (electronic sports) in Turkey, analyzing game fans interaction with League of
Legends which has become a product of popular culture. To investigate eSports
fandom, this study relies on interviews with professional and amateur players and
virtual ethnographic methods. Findings of the interviews and ethnographic data aim
to ground the similarities between League of Legends players reproducing and code
switching techniques in the light of Anglo American studies on series and movie
fandom.by Samet Taygun Özbıçakçı
Equity as a vehicle for law reform: The case of unilateral mistake
No full textIn this paper I ask whether English Law should permit rescission for unilateral mistakes in the formation of contract, in circumstances where the defendant (D) knew or should have known about the claimant’s (C) mistake, and if so, should Equity be (re)employed to deploy the remedy. The paper introduces the Caveat Emptor Common Law rule on this issue, which rules out rescission, and the various considerations that count in its favour. I argue that neither considerations from efficiency, nor those based in ethics can justify the current rule, and that new, flexible and morally-sensitive resolution is called for. If we examine the way in which Equity intervenes to reform areas of law where the Common Law fails to provide a satisfactory solution to legal disputes, we will see that the Caveat Emptor rule displays exactly the kind of defects that Equity does a very good job at remedying. The law on the duty to disclose information at the precontractual stage emerges as an excellent example for Equity’s great potential as a vehicle for improving the law in a measured, nuanced and imaginative way.Peer reviewe
Equity as a Vehicle for Law Reform: The Case of Unilateral Mistake
No full textIn this paper I ask whether English Law should permit rescission for unilateral mistakes in the formation of contract, in circumstances where the defendant (D) knew or should have known about the claimant’s (C) mistake, and if so, should Equity be (re)employed to deploy the remedy. The paper introduces the Caveat Emptor Common Law rule on this issue, which rules out rescission, and the various considerations that count in its favour. I argue that neither considerations from efficiency, nor those based in ethics can justify the current rule, and that new, flexible and morally-sensitive resolution is called for. If we examine the way in which Equity intervenes to reform areas of law where the Common Law fails to provide a satisfactory solution to legal disputes, we will see that the Caveat Emptor rule displays exactly the kind of defects that Equity does a very good job at remedying. The law on the duty to disclose information at the precontractual stage emerges as an excellent example for Equity’s great potential as a vehicle for improving the law in a measured, nuanced and imaginative way.Peer reviewe
On Fixed Points of Generalized α-φ Contractive Type Mappings in Partial Metric Spaces
No full textRecently, Samet et al. (B. Samet, C. Vetro and P. Vetro, Fixed point theorem for - contractive type mappings, Nonlinear Anal. 75 (2012), 2154--2165) introduced a very interesting new category of contractive type mappings known as - contractive type mappings. The results obtained by Samet et al. generalize the existing fixed point results in the literature, in particular the Banach contraction principle. Further, Karapinar and Samet (E. Karapinar and B. Samet, Generalized --contractive type mappings and related fixed point theorems with applications, Abstract and Applied Analysis 2012 Article ID 793486, 17 pages doi:10.1155/2012/793486) generalized the - contractive type mappings and established some fixed point theorems for this generalized class of contractive mappings. In (G. S. Matthews, Partial metric topology, Ann. New York Acad. Sci. 728 (1994), 183--197), the author introduced and studied the concept of partial metric spaces, and obtained a Banach type fixed point theorem on complete partial metric spaces. In this paper, we establish the fixed point theorems for generalized - contractive mappings in the context of partial metric spaces. As consequences of our main results, we obtain fixed point theorems on partial metric spaces endowed with a partial order and that for cyclic contractive mappings. Our results extend and strengthen various known results. Some examples are also given to show that our generalization from metric spaces to partial metric spaces is real
Author Reputation Measurement on Question and Answer Sites by the Classification of Author-Generated Content
No full textIn the field of software engineering, practitioners' share in the constructed knowledge cannot be underestimated and is mostly in the form of grey literature (GL). GL is a valuable resource though it is subjective and lacks an objective quality assurance methodology. In this paper, a quality assessment scheme is proposed for question and answer (Q;A) sites. In particular, we target stack overflow (SO) and stack exchange (SE) sites. We model the problem of author reputation measurement as a classification task on the author-provided answers. The authors' mean, median, and total answer scores are used as inputs for class labeling. State-of-the-art language models (BERT and DistilBERT) with a softmax layer on top are utilized as classifiers and compared to SVM and random baselines. Our best model achieves 63.8% accuracy in binary classification in SO design patterns tag and 71.6% accuracy in SE software engineering category. Superior performance in SE software engineering can be explained by its larger dataset size. In addition to quantitative evaluation, we provide qualitative evidence, which supports that the system's predicted reputation labels match the quality of provided answers
On Fixed Points of Generalized α-φ Contractive Type Mappings in Partial Metric Spaces
No full textRecently, Samet et al. (B. Samet, C. Vetro and P. Vetro, Fixed point theorem for - contractive type mappings, Nonlinear Anal. 75 (2012), 2154--2165) introduced a very interesting new category of contractive type mappings known as - contractive type mappings. The results obtained by Samet et al. generalize the existing fixed point results in the literature, in particular the Banach contraction principle. Further, Karapinar and Samet (E. Karapinar and B. Samet, Generalized --contractive type mappings and related fixed point theorems with applications, Abstract and Applied Analysis 2012 Article ID 793486, 17 pages doi:10.1155/2012/793486) generalized the - contractive type mappings and established some fixed point theorems for this generalized class of contractive mappings. In (G. S. Matthews, Partial metric topology, Ann. New York Acad. Sci. 728 (1994), 183--197), the author introduced and studied the concept of partial metric spaces, and obtained a Banach type fixed point theorem on complete partial metric spaces. In this paper, we establish the fixed point theorems for generalized - contractive mappings in the context of partial metric spaces. As consequences of our main results, we obtain fixed point theorems on partial metric spaces endowed with a partial order and that for cyclic contractive mappings. Our results extend and strengthen various known results. Some examples are also given to show that our generalization from metric spaces to partial metric spaces is real
- …
