Academic literature on the topic 'Model-based definitions'
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Journal articles on the topic "Model-based definitions"
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Dickerson, Michael, Harry P. Frisch, and David W. Oliver. "Definitions for Model-Based Systems Engineering." INSIGHT 10, no. 3 (July 2007): 23–24. http://dx.doi.org/10.1002/inst.200710323a.
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Tan, Hai Zhong. "A New Criterion for Attribute Reduction Based on Variable Precision Rough Set Model." Applied Mechanics and Materials 121-126 (October 2011): 1579–84. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1579.
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The rule set which is acquired based on rough set theory can be classified into two categories: deterministic rules and probabilistic rules. Traditional attribute reduction definitions in variable precision rough set model cannot guarantee the rule properties, namely deterministic or probabilistic. In this paper, a new criterion for attribute reduction is put forward based on variable precision rough set model. The rule properties can be preserved during the process of attribute reduction. The relationships between the new reduct definition and available definitions, including Ziarko’s reduct definition and β lower distribution reduct definition are also discussed.
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Socha, Grzegorz, and Lech Dietrich. "Deformation Based Fatigue Damage Accumulation Model." Solid State Phenomena 240 (August 2015): 128–33. http://dx.doi.org/10.4028/www.scientific.net/ssp.240.128.
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This paper reports results of fatigue testing performed under fully reversible, load controlled uniaxial tension-compression. For this scheme of loading definition of relative damage indicator and cumulative damage indicator parameter was given and changes of such parameters during the life of the material were shown for two grades of steel. Simple damage criterion proposed by Johnson [6] was modified to define damage indicator parameter. Definitions of damage parameters based on proposed damage indicator and damage indicator parameter were also given. Damage curves showing changes of damage parameter as the function of the life fraction were shown to illustrate progress of damage during the life of the material.
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P. Sedykh, Arkadiy, Elena I. Bezrukova, Nelly L. Krivchikova, Natalia B. Kudryavtseva, V. Naydenova, Tatiana N. Skokova, and Sophia A. Moisseeva. "TEXT DEFINITIONS OF CLASSIFYING TYPE." Humanities & Social Sciences Reviews 7, no. 5 (October 24, 2019): 811–15. http://dx.doi.org/10.18510/hssr.2019.75103.
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Purpose: This article deals with the detailed consideration of definitional periphrases of classifying type as the textual modification of generic and specific classic definition; the essence of definitional relations of such type of text definitions is revealed.
Methodology: The main method used in the article is the method of definitional analysis. The intuitive-logical, inductive-empirical, deductive-synthetic method, component analysis method and transformation method were also used. The study was based on examples from fiction, educational, popular science literature, as well as collections of quotes and aphorisms.
Result: Moreover, the detailed analysis of logical-semantic relations supplementing the definitional relations in these definitional periphrases is given. Classification relations are described especially thoroughly. The main attention is focused on revealing the types of definitional classifying predictors, on the basis of which modified text definitions are formed.
Applications: This research can be used for universities, teachers, and students.
Novelty/Originality: In this research, the model of Text Definitions of Classifying Type is presented in a comprehensive and complete manner.
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Brusoni, Vittorio, Luca Console, Paolo Terenziani, and Daniele Theseider Dupré. "A spectrum of definitions for temporal model-based diagnosis." Artificial Intelligence 102, no. 1 (June 1998): 39–79. http://dx.doi.org/10.1016/s0004-3702(98)00044-7.
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CONSOLE, LUCA, and PIETRO TORASSO. "A spectrum of logical definitions of model-based diagnosis." Computational Intelligence 7, no. 3 (August 1991): 133–41. http://dx.doi.org/10.1111/j.1467-8640.1991.tb00388.x.
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Hadaegh, Farzad, Azadeh Zabetian, Maryam Tohidi, Asghar Ghasemi, Farhad Sheikholeslami, and Fereidoun Azizi. "Prevalence of Metabolic Syndrome by the Adult Treatment Panel III, International Diabetes Federation, and World Health Organization Definitions and their Association with Coronary Heart Disease in an Elderly Iranian Population." Annals of the Academy of Medicine, Singapore 38, no. 2 (February 15, 2009): 142–49. http://dx.doi.org/10.47102/annals-acadmedsg.v38n2p142.
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Introduction: To determine the prevalence of the metabolic syndrome (MS) in an Iranian elderly population and show its association with coronary heart disease (CHD). Materials and Methods: This is a cross-sectional study on 720 Iranian men and women aged 65 years who participated in the Tehran Lipid and Glucose Study (TLGS). Logistic regression analysis was used to estimate the odds ratio (OR) of developing CHD in model 1, an age-adjusted model; model 2, adjusted for age, smoking status, premature history of CHD and low-density lipoprotein (LDL) cholesterol; and model 3, adjusted for mentioned variables plus the MS components. Results: The prevalence of MS was 50.8%, 41.8% and 41.9% based on the Adult Treatment Panel (ATPIII), the World Health Organisation (WHO), and the International Diabetes Federation (IDF) definitions, respectively. The IDF definition showed high agreement with the ATPIII definition. Age-adjusted OR (95% CI) of the MS for CHD was 1.6 (1.2 to 2.2) by both the ATPIII and WHO definitions and 1.4 (1.0 to 1.9) by the IDF definition. IDF-defined MS lost its association with CHD in model 2. In model 3, obesity (WHO definition) and high blood pressure (ATPIII and WHO definitions) were associated with CHD. Conclusions: In an elderly Iranian population MS is highly prevalent. ATPIII and WHO definitions seem to be more pertinent than IDF for screening CHD risk. None of these definitions showed association with CHD when considering their components. Key words: Ageing, Cardiovascular disease, Epidemiology, Insulin resistance
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Benzi, Margherita. "Defining Metabolic Syndrome: Which Kind of Causality, if any, is Required?" Disputatio 9, no. 47 (December 1, 2017): 553–80. http://dx.doi.org/10.1515/disp-2017-0018.
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Abstract The definition of metabolic syndrome (MetS) has been, and still is, extremely controversial. My purpose is not to give a solution to the associated debate but to argue that the controversy is at least partially due to the different ‘causal content’ of the various definitions: their theoretical validity and practical utility can be evaluated by reconstructing or making explicit the underlying causal structure. I will therefore propose to distinguish the alternative definitions according to the kinds of causal content they carry: (1) definitions grounded on associations, (2) definitions presupposing a causal model built upon statistical associations, and (3) definitions grounded on underlying mechanisms. I suggest that analysing definitions according to their causal content can be helpful in evaluating alternative definitions of some diseases. I want to show how the controversy over MetS suggests a distinction among three kinds of definitions based on how explicitly they characterise the syndrome in causal terms, and on the type of causality involved. I will call ‘type 1 definitions’ those definitions that are purely associative; ‘type 2 definitions’ the definitions based on statistical associations, plus generic medical and causal knowledge; and ‘type 3 definitions’ the definitions based on (hypotheses about) mechanisms. These kinds of definitions, although different, can be related to each other. A definition with more specific causal content may be useful in the evaluation of definitions characterised by a lower degree of causal specificity. Moreover, the identification of the type of causality involved is of help to constitute a good criterion for choosing among different definitions of a pathological entity. In section (1) I introduce the controversy about MetS, in section (2) I propose some remarks about medical definitions and their ‘causal import’, and in section (3) I suggest that the different attitudes towards the definition of MetS are relevant to evaluate their explicative power.
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Mustafina, R. F. "PROTOTYPICAL MODELING OF ENGLISH VERBS OF TRUE INFORMATION." Bulletin of Udmurt University. Series History and Philology 32, no. 5 (October 14, 2022): 1137–40. http://dx.doi.org/10.35634/2412-9534-2022-32-5-1137-1140.
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The article is an attempt at prototypical analysis of English verbs of true information by creating prototypical situations of verbs and identifying propositions from the definitions of verbs. In our study, a prototypical situation is understood as a cognitive model of a typical situation based on the word definition. During the definitional analysis of verbs, propositions and presuppositions were also distinguished. The article examined 22 English verbs of true information.
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Kamhi, Alan G. "The Need for a Broad-Based Model of Phonological Disorders." Language, Speech, and Hearing Services in Schools 23, no. 3 (July 1992): 261–68. http://dx.doi.org/10.1044/0161-1461.2303.261.
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My response to Fey’s article (1985; reprinted 1992, this issue) focuses on the confusion caused by the application of simplistic phonological definitions and models to the assessment and treatment of children with speech delays. In addition to having no explanatory adequacy, such definitions/models lead either to assessment and treatment procedures that are similarly focused or to procedures that have no clear logical ties to the models with which they supposedly are linked. Narrowly focused models and definitions also usually include no mention of speech production processes. Bemoaning this state of affairs, I attempt to show why it is important for clinicians to embrace broad-based models of phonological disorders that have some explanatory value. Such models are consistent with assessment procedures that are comprehensive in nature and treatment procedures that focus on linguistic, as well as motoric, aspects of speech.
Dissertations / Theses on the topic "Model-based definitions"
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Kopteropoulos, Alexandros, and Kumaran Kabilan. "Model Based Definition for Assemblies." Thesis, KTH, Industriell produktion, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-287191.
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With the recent development of technology in manufacturing and the rise of Industry 4.0, the Model-Based Definition approach has gained popularity in industries since it is trying to eliminate the use of drawings and the scattering of data and create a digital unified source of information. Scania has initiated this practice attempting to digitalize data, methods and processes comprehensively in the manufacturing section on the single parts level. The purpose of this project is to investigate the requirements in the component mounting section on the assembly level along with the potential benefits and challenges for the MBD scenario before implementation. Through analyzing interviews and questionnaires, the company’s needs are presented while recommendations for proceeding to solely 3D models handling are stated. As a conclusion, it is shown that there are fundamental issues in the current way of data handling and that MBD could provide solutions in improving efficiency, product quality and reduce risk of errors.Utvecklingen av teknik inom tillverkningsindustrin och utvecklingen av Industri 4.0 har medfört att begreppet modellbaserad definition (MBD) har vunnit mark, eftersom den strävar efter att eliminera användning av ritningar och utspridd data, genom att skapa en enhetlig digital informationskälla. Scania har tidigare inlett arbetet med att digitalisera data, metoder och processer för enskilda komponenter inom tillverkningssektorn. Syftet med detta projekt är att undersöka vilka krav som gäller för montering av komponenter på sammanställningsnivå, potentiella fördelar och utmaningar med MBD innan det implementeras. Genom att analysera intervjuer och frågor, presenteras företagets behov. Utifrån detta ger vi rekommendationer för hur Scania ska kunna övergå till helt till att använda 3D-modeller. Slutsatsen är att den nuvarande datahanteringen har brister och att MBD kan tillhandahålla lösningar för att förbättra effektivitet, produktkvalitet och minska risken för fel.
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LUNDQVIST, TOMMY, and FREDRIK PHILLIPS. "Model Based Definition : The Main Effects of Implementing Model Based Definition in an Automotive Manufacturing Industry." Thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192501.
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Idag verkar 2D-ritningen på Scania som den primära metoden att presentera, skicka, och lagra information gällandes en produkt utmed dess livscykel. Sedan 90-talet har detta kommit att ändras, då det har blivit mer och mer populärt att frångå 2D-ritningen och istället presentera produkten och dess beskrivande text i en 3D-miljö, en metod känd som Model Based Definition, eller MBD. MBD blivit en förändrare inom tillverkningsindustrin, då kostnadskurvan har stagnerat för flertalet företag som har implementerat metoden. Det här examensarbetet utfördes på Scania CV AB i Södertälje, Sweden, med avsikt för att utforska vad för effekt en implementering av MBD har i en tillverkningsindustri inom fordonsbranschen. Över 30 intervjuer och observationer utfördes på Scania, och ytterligare tre undersökningar utfördes på tre externa företag med liknande bakgrund som Scania. Resultaten sammanställdes och analyserades gentemot ett teoretiskt ramverk inom de kopplade disciplinerna till MBD. Utredningsresultatet antyder att en implementation är möjlig, och att fördelarna väger tyngre än de förutsagda nackdelarna. De största fördelarna var relaterade till integrerad produktutveckling (concurrent engineering), då MBD integrerar nedströmsavdelningar i ett tidigare skede. Det bedömdes även att en enda informationskälla är mycket fördelaktigt för alla avdelningar, då det förebygger tvetydighet som annars inträffar vid användandet av både 2D och 3D. Eftersom MBD har mycket inflytande över Scanias samtliga avdelningar, utforskades det även hur Scania ska gå tillväga för att implementera MBD i sin organisation.As of today at Scania, the 2D drawing is the primary way to convey, forward, and store information regarding a product through its lifecycle. Since the 90’s however, this has come to change, bringing more and more popularity to discard the 2D drawing and instead present the product and all of its annotations in a 3D environment, a method known as Model Based Definition or MBD. MBD has become a game changer in the manufacturing industry, as the cost curve has declined for several companies that have implemented the method. This thesis was conducted at Scania CV AB in Södertälje, Sweden, in order to investigate the impacts of implementing MBD in an automotive manufacturing organization. Over 30 interviews and observations took place at Scania, as well as investigating three external organizations with similar backgrounds. The results were compiled and analyzed with a theoretical framework, covering the interconnected disciplines of MBD. The findings suggest that an implementation is indeed possible and that the benefits outweigh the predicted challenges that come with an implementation. The main benefits were related to concurrent engineering, as MBD integrates downstream departments at an earlier stage. It was also deemed that a single source of truth is greatly beneficial for every department, as this counteracts ambiguity that otherwise occurs when using both 2D and 3D. As MBD has great influence in most of Scania’s departments, guidance for how and when to conduct the change management was also presented.
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Smith, Matthew William Ph D. Massachusetts Institute of Technology. "Model-based requirement definition for instrument systems." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90729.
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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2014.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 199-210).
Instrument systems such as imagers, radars, spectrometers, and radiometers are important to users in the astronomy, Earth science, defense, and intelligence communities. Relatively early in the development cycle, performance requirements are defined at the top level and allocated to various subsystems or components. This is a critical step, as poor requirement definition and resulting requirement instability has historically led to increased cost and, in some cases, program cancelation. Defining requirements for instrument systems is uniquely challenging in part due to the divide between system users (e.g. scientists) and system designers (e.g. engineers). The two groups frequently differ in terms of background, objectives, and priorities, and this disconnect often leads to difficulty in evaluating and resolving requirement trade-offs. The objective of this thesis is to develop a model-based approach to requirement definition that addresses the above challenges. The goal of the methodology is to map science objectives to a set of top-level engineering requirements in a manner that enables traceability in the requirement hierarchy and facilitates informed trades across the science/engineering interface. This is accomplished by casting the requirement definition process as an optimization problem. First, an executable instrument model is created to capture the forward mapping between engineering decisions and science capability. The model is then exercised to find an inverse mapping that produces multiple sets of top-level engineering requirements that all meet the performance objectives. A new heuristic optimization algorithm is developed to carry out this task efficiently and exhaustively. Termed the Level Set Genetic Algorithm (LSGA), this procedure identifies contours of equal performance in the design space using an elite-preserving selection operator to ensure convergence, together with a global diversity metric to ensure thorough exploration. LSGA is derivative-free, parallelizable, and compatible with mixed integer problems, making it applicable to a wide variety of modeling and simulation scenarios. As a case study, the model-based requirement definition methodology is applied to the Regolith X-ray Imaging Spectrometer (REXIS), an instrument currently in development at MIT and scheduled to launch on NASA's OSIRIS-REx asteroid sample return mission in the fall of 2016. REXIS will determine the elemental composition of the target asteroid by measuring the solar-induced fluorescence spectrum in the soft x-ray regime (0.5-7.5 keV). A parametric model of the instrument is created to simulate its end-to-end operation, including x-ray propagation and absorption, detector noise processes, pixel read-out, signal quantization, and spectrum reconstruction. After validating the model against laboratory data, LSGA is used to identify multiple sets of top-level engineering requirements that meet the REXIS science objectives with regard to spectral resolution. These results are compared to the existing baseline requirement set, providing insights into the alternatives enabled by the model-based approach. Several additional strategies are presented to quantify and mediate requirement trades that may occur later in the development cycle due to science creep or engineering push-back. Overall, these methods provide a means of synthesizing and then evaluating top-level engineering requirements based on given science objectives. By doing so in a comprehensive and traceable manner, this approach clarifies the trade-offs between scientists and engineers that inevitably arise during the design of instrument systems.
by Matthew William Smith.
Ph. D.
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Stanier, C. F. "A model integrity based object-relational data model and complex data model definition framework." Thesis, Staffordshire University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522119.
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Ijomah, Winifred Louissa. "A model-based definition of the generic remanufacturing business process." Thesis, University of Plymouth, 2002. http://hdl.handle.net/10026.1/2829.
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Remanufacturing is a process of bringing used products to a "like-new" functional state by rebuilding and replacing their component parts. The practice has a low profile in world economies, however, studies indicate that it obtains cost savings in the region of 20% to 80%, as well as quality similar to that of an equivalent "new" product. In fact, in excess of 73,000 firms are engaged in some sort of remanufacturing in the United States alone. The key remanufacturing issues are the ambiguity in its definition and the scarcity of its analytic models. The objective of the research was to address these issues, and was achieved using a 3-Phase research approach that followed Eisenhardt's (1989) case study methodology. Initially, the research examined remanufacturing operations in order to unambiguously define it. Following this, the remanufacturing business process was modelled to define remanufacturing in the context of its total system. The research contributions are a robust definition of remanufacturing and a comprehensive generic model of the remanufacturing business process. The research beneficiaries are industry and academia, because the unambiguous definition permits remanufacturing to be differentiated from alternative secondary market operations for the first time. This assists researchers to explicitly understand remanufacturing so they can undertake effective remanufacturing research and correctly disseminate their findings. The generic model is a remanufacturing-specific, analytic error-reduction tool to reduce risk in remanufacturing. The research originality is that for the first time remanufacturing has been analysed from a business process perspective, an unambiguous definition of remanufacturing is determined and a generic model of the remanufacturing business process has been established.
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ROBERT, WIDMAN. "Investigating Model-Based Definition Implementation: A Case Study on Cross-Functionality through Product Lifecycle Management." Thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192325.
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Integrerad produktutveckling och liknande tekniker växer i industrin. De är bevisade i forskning och i praktiken att effektivisera och öka kvalitén i produktutveckling. Model-Based Definition är en av dessa tekniker, och för att beskriva det kort är det integrerad produktutveckling realiserat med hjälp av omfattande och strategisk användning av CAD verktyg. Saab Dynamics är en tillverkare av militära produkter. De söker nu att börja använda högkvalitetsstrategin Model-Based Definition, och mer specifikt vill de modernisera mjukvaran de använder och se till att de använder den nya programvaran med en tydlig strategi i åtanke. Denna uppsats sökte att analysera implementering av Model-Based Definition i ett tidigt skede av utveckling för att förbereda Saab Dynamics att applicera denna typ av strategi för framtida produktutveckling. Detta undersöktes genom en case studie inom ett annat Saab bolag, Saab Electronic Defence Systems. Genom litteraturstudier inriktningen på arbetet bestämdes till att innehålla en stor fokus på ledningsproblematik inom Model-Based Definition. Detta för att expandera kunskapen inom området, eftersom det i nuläget är dominerat av teknikfokus. Case studien själv utfördes genom intervjuer med medarbetare på Saab EDS, med prioriteringen att urvalet ska bestå av en mångfald av medarbetare från olika funktioner, för att få ett kors-funktionellt perspektiv i resultaten. Analys av den insamlade informationen visade att även om tekniska problem inte var i fokus för undersökningen, så var det fortfarande en framstående faktor för Model-Based Definition implementering i ett tidigt skede. Dock kan det argumenteras för att det var lika mycket, om inte mer som pekar på lednings- och organisations- relaterade faktorer som viktiga för en framgångsrik Model-Based Definition strategi. Relaterat till dessa faktorer, rekommendationer för Saab att applicera i tidig implementering inkluderar bland andra: Skapa en stark laganda för att ackompanjera den huvudsakligen samarbetsrelaterade strategin, planera framtida arbete i projektet för att uppnå kortsiktiga vinster och hitta nya affärsmöjligheter för att få ett större utbrett stöd i organisationen.Concurrent engineering and similar techniques are on the rise in the industry. They are proven in research and in practice to strengthen the efficiency and quality in product development. Model-Based Definition is one of these techniques, in short it is concurrent engineering realized through an extensive and strategic use of CAD tools. Saab Dynamics is a producer of military products. They are now seeking to join the stronger players in this market in the use of the high quality strategy Model-Based Definition. Specifically, they seek to modernize their software and create a methodology where the software is used in a strategic manner. This thesis sought to analyze the implementation of a Model-Based Definition strategy in its initial stages of development to prepare the project owner Saab Dynamics to transition into using this type of strategy for future product development. This was researched through a case-study of another Saab subsidiary, Saab Electronic Defence Systems. Through literature studies the direction of the thesis was chosen to contain a large focus on managerial issues of Model-Based Definition, to expand the knowledge in the area from the highly technical perspective that is dominant today. The case-study itself was conducted by interviewing co-workers at Saab EDS, with prioritization towards a large diversity among the functions of co-workers to achieve a cross-functional perspective in the results. Analysis of the gathered information showed that even though the technical issues was not the main focus of the research, it was still a prominent factor in early Model-Based Definition implementation. However, arguably there are as much if not more that points to organisational and managerial factors being important for a succesful Model-Based Definition strategy. Pertaining to these factors, recommendations for Saab to solve issues encountered in the early implementation at Saab EDS include (but not limited to) the following: Create a strong team culture to accompany the cooperative strategy, planning the further progress to achieve short term benefits and new business opportunities to gain widespread support in the organization.
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Ballarin, Naya Manuel. "Definition of Descriptive and Diagnostic Measurements for Model Fragment Retrieval." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/171604.
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Tesis por compendio[ES] Hoy en día, el software existe en casi todo. Las empresas a menudo desarrollan y mantienen colecciones de sistemas de software personalizados que comparten algunas características entre ellos, pero que también tienen otras características particulares. Conforme el número de características y el número de variantes de un producto crece, el mantenimiento del software se vuelve cada vez más complejo. Para hacer frente a esta situación la Comunidad de Ingeniería del Software basada en Modelos está abordando una actividad clave: la Localización de Fragmentos de Modelo. Esta actividad consiste en la identificación de elementos del modelo que son relevantes para un requisito, una característica o un bug. Durante los últimos años se han propuesto muchos enfoques para abordar la identificación de los elementos del modelo que corresponden a una funcionalidad en particular. Sin embargo, existe una carencia a la hora de cómo se reportan las medidas del espacio de búsqueda, así como las medidas de la solución a encontrar. El objetivo de nuestra tesis radica en proporcionar a la comunidad dedicada a la actividad de localización de fragmentos de modelo una serie de medidas (tamaño, volumen, densidad, multiplicidad y dispersión) para reportar los problemas de localización de fragmentos de modelo. El uso de estas novedosas medidas ayuda a los investigadores durante la creación de nuevos enfoques, así como la mejora de aquellos enfoques ya existentes. Mediante el uso de dos casos de estudio reales e industriales, esta tesis pone en valor la importancia de estas medidas para comparar resultados de diferentes enfoques de una manera precisa. Los resultados de este trabajo han sido redactados y publicados en foros, conferencias y revistas especializadas en los temas y contexto de la investigación. Esta tesis se presenta como un compendio de artículos acorde a la regulación de la Universitat Politècnica de València. Este documento de tesis presenta los temas, el contexto y los objetivos de la investigación. Presenta las publicaciones académicas que se han publicado como resultado del trabajo y luego analiza los resultados de la investigación.
[CA] Hui en dia, el programari existix en quasi tot. Les empreses sovint desenrotllen i mantenen col·leccions de sistemes de programari personalitzats que compartixen algunes característiques entre ells, però que també tenen altres característiques particulars. Conforme el nombre de característiques i el nombre de variants d'un producte creix, el manteniment del programari es torna cada vegada més complex. Per a fer front a esta situació la Comunitat d'Enginyeria del Programari basada en Models està abordant una activitat clau: la Localització de Fragments de Model. Esta activitat consistix en la identificació d'elements del model que són rellevants per a un requisit, una característica o un bug. Durant els últims anys s'han proposat molts enfocaments per a abordar la identificació dels elements del model que corresponen a una funcionalitat en particular. No obstant això, hi ha una carència a l'hora de com es reporten les mesures de l'espai de busca, així com les mesures de la solució a trobar. L'objectiu de la nostra tesi radica a proporcionar a la comunitat dedicada a l'activitat de localització de fragments de model una sèrie de mesures (grandària, volum, densitat, multiplicitat i dispersió) per a reportar els problemes de localització de fragments de model. L'ús d'estes noves mesures ajuda als investigadors durant la creació de nous enfocaments, així com la millora d'aquells enfocaments ja existents. Per mitjà de l'ús de dos casos d'estudi reals i industrials, esta tesi posa en valor la importància d'estes mesures per a comparar resultats de diferents enfocaments d'una manera precisa. Els resultats d'este treball han sigut redactats i publicats en fòrums, conferències i revistes especialitzades en els temes i context de la investigació. Esta tesi es presenta com un compendi d'articles d'acord amb la regulació de la Universitat Politècnica de València. Este document de tesi presenta els temes, el context i els objectius de la investigació. Presenta les publicacions acadèmiques que s'han publicat com resultat del treball i després analitza els resultats de la investigació.
[EN] Nowadays, software exists in almost everything. Companies often develop and maintain a collection of custom-tailored software systems that share some common features but also support customer-specific ones. As the number of features and the number of product variants grows, software maintenance is becoming more and more complex. To keep pace with this situation, Model-Based Software Engineering Community is addressing a key-activity: Model Fragment Location (MFL). MFL aims at identifying model elements that are relevant to a requirement, feature, or bug. Many MFL approaches have been introduced in the last few years to address the identification of the model elements that correspond to a specific functionality. However, there is a lack of detail when the measurements about the search space (models) and the measurements about the solution to be found (model fragment) are reported. The goal of this thesis is to provide insights to MFL Research Community of how to improve the report of location problems. We propose using five measurements (size, volume, density, multiplicity, and dispersion) to report the location problems during MFL. The usage of these novel measurements support researchers during the creation of new MFL approaches and during the improvement of those existing ones. Using two different case studies, both real and industrial, we emphasize the importance of these measurements in order to compare results in a deeply way. The results of the research have been redacted and published in forums, conferences, and journals specialized in the topics and context of the research. This thesis is presented as compendium of articles according the regulations in Universitat Politècnica de València. This thesis document introduces the topics, context, and objectives of the research, presents the academic publications that have been published as a result of the work, and then discusses the outcomes of the investigation.
Ballarin Naya, M. (2021). Definition of Descriptive and Diagnostic Measurements for Model Fragment Retrieval [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/171604
TESIS
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Khoshnevis, Mahan, and Emilia Lindberg. "Development of a Demonstrator in the Aerospace Industry for Visualization of 3D Work Instructions." Thesis, Linköpings universitet, Maskinkonstruktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119984.
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This master thesis was performed at the business area of Aeronautics at Saab AB in collaboration with Linköping University during the spring of 2015. In a complex product development environment, having knowledge about different processes is advantageous for efficiency. Model Based Definition (MBD) is a product development process where a 3D-model is the main source of information and the same 3D-model is applied all the way from design to production. In assembly, the operator follows work instructions where the 3D-model, and its requirements, is visualized. The model is always updated to the latest version and no 2D-drawings are needed. Saab applied MBD during the development of the new generation of the fighter aircraft JAS 39 Gripen. This change, from previously 2D to 3D, has caused that both internal and external people have minor knowledge about the new developing process of MBD. The purpose of the thesis was to develop a demonstrator acting as an educational environment to share knowledge about the MBD-process and the 3D work instructions. New methods and processes could be tested and evaluated in the demonstrator before implementing into the real product development process. By following and developing an interdependent and iterative product development process, this work has visualized the MBD-process. Designing and developing a demonstrator, using the same tools as in the real product development process, accomplished this. This thesis has developed a demonstrator that includes the main components of a physical model with corresponding 3D work instructions and a conceptual layout. A physical Lego model of Gripen provides a flexible and interesting way of sharing knowledge to the user who interacts with the demonstrator. The 3D work instructions were created in a way so that the user can assemble and interact with the same expressions and terms in order to get an understanding about how they are used. The educational aspect is important where simplifications and additional notes to the instructions help to get a better understanding. Depending on who the user is, different levels of preparations are needed. The recognition factor is important to a user with experience of MBD; it needs to be able to understand how different terms and requirements are used in the development process. The future work is about setting up the demonstrator and conduct usability tests to evaluate, modify and implement more details. Using a demonstrator in this purpose can be helpful for evaluating different techniques, methods or systems and reduce the errors in the product development process. It can also encourage people to a new enjoyable way of learning.
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Watanabe, Toyohide, Yuuji Yoshida, and Teruo Fukumura. "Editing model based on the object-oriented approach." IEEE, 1988. http://hdl.handle.net/2237/6930.
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Ronestjärna, Jonathan. "Presentation av underhållsföreskrifter med modellbaserat konstruktionsunderlag." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69295.
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Detta examensarbete utfördes på Saab AB, Support & Service, i Tannefors, Linköping, samt vid Institutionen för datavetenskap på Linköpings universitet. Ett moment i kvalitetsarbetet för komplexa industriprodukter, som till exempel flygplan, är att skifta från tvådimensionellt konstruktionsunderlag till tredimensionellt. Tredimensionella modeller har funnits i flera år. Nackdelen med dessa modeller är att de inte kunnat bära någon extra information, förutom den information som krävs för att de ska vara uppritade. Tekniken har gått framåt och nu går det att lagra teknikinformation i modellerna samt göra simuleringar som inte gått att göra förut. I och med att teknikinformation finns i modellerna, går det även att använda denna information till de olika publikationer som skrivs. Syftet med denna studie är att analysera hur teknikinformationsflödet mellan modeller och användare kan komma att se ut vid användning av modellbaserat konstruktionsunderlag, samt att föreslå exempel på hur tekniska publikationer för Gripen NG kan komma att se ut i framtiden. När all information finns i modellen, behövs inte lika mycket personal som redigerar bilder eller skriver text. Detta kommer innebära ekonomisk vinst och efter ett tags användning, kommer det även ge en ytterligare ekonomisk vinst, eftersom användarna har lärt sig hur produkten fungerar och på så sätt blivit effektivare på att använda den än de nuvarande dokumenten.This thesis was carried out at Saab AB, Support & Service, in Tannefors, Linköping, and at the Department of Computer Science at Linköping University. One item in the quality work for complex industrial products, such as aircrafts, is to shift from two-dimensional design data to three-dimensional. Three-dimensional models have been around for years. The disadvantage of these models is that they could not carry any extra information, in addition to the information necessary for them to be plotted. The technology has moved on and now it is possible to store technical information in the models and do simulations that didn't work before. As the technical information is contained in the models, you can also use this information to the various publications that are printed. The purpose of this study is to analyze how the technical information flow between models and users, and also to propose examples of how technical publications for the Gripen NG may be in the future when using model-based design documents. Once all information is in the model, it is not needed to have as much staff employed for editing pictures or writing text. This will involve a financial gain, and after some time, it will also provide an additional financial benefit, because the users have learned how the product works and will be more efficient in using it than the current documents.
Books on the topic "Model-based definitions"
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Ha, Yonghoon. Java-based implementation of Monterey-Miami Parabolic Equation (MMPE) model with enhanced visualization and improved method of environmental definition. Monterey, Calif: Naval Postgraduate School, 2000.
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Simion, Samuela. Marco Polo, Il Devisement dou monde nella redazione veneziana V (cod. Hamilton 424 della Staatsbibliothek di Berlino). Venice: Edizioni Ca' Foscari, 2019. http://dx.doi.org/10.30687/978-88-6969-321-2.
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The volume contains the commented edition of the Devisement dou monde based on the Berlin Staatsbibliothek - Preußischer Kulturbesitz Codex, Hamilton 424. The Hamilton 424 Codex, transcribed in Venice in the second half of the fifteenth century, contains the translation of a Latin model (whose features can be partially reconstructed virtually starting from some translation errors) and is the only known witness of V. Due to its characteristics, V represents a crucial point in the definition of the transmission dynamics of Polo’s book: its readings are confirmed, often in a broader form, by the Latin version known as Z. V strengthens the hypothesis that, after returning to Venice, Marco Polo modified the text written with Rustichello da Pisa in Genoa. Actually, version V represents the first step of this long process of rewriting, which probably occurred in several phases. This volume includes an introduction, the text edition, a textual commentary, as well as an index. A second and forthcoming volume will contain the linguistic analysis and glossary.
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Fischer, Bryan, and Roy D. Whittenburg. 3D Model-Based Definition and Model-Based Enterprise: Optimizing Business for 3D and 3D Datasets. Taylor & Francis Group, 2020.
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Fischer, Bryan, and Roy D. Whittenburg. 3D Model-Based Definition and Model-Based Enterprise: Optimizing Business for 3D and 3D Datasets. Taylor & Francis Group, 2018.
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Creo Parametric 4.0: Working with 3D Annotations and Model Based Definition. ASCENT, Center for Technical Knowledge, 2018.
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International, IPC. IPC/DAC-2552 General Electronic Components Model-Based Definition (MBD) Standard. IPC International, 2022.
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Baker, D. J. The Model-Based Definition Handbook: A Four-Step Path to MBD Success. David J Baker, 2020.
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ASCENT - Center for Technical Knowledge. Autodesk Inventor 2022 : Working with 3D Annotations & Model-Based Definition: Autodesk Authorized Publisher. ASCENT, Center for Technical Knowledge, 2021.
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Ascent - Center for Technical Knowledge. Autodesk Inventor 2019 : Working with 3D Annotations and Model-Based Definition: Autodesk Authorized Publisher. ASCENT, Center for Technical Knowledge, 2018.
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Specific hardening function definition and characterization of a multimechanism generalized potential-based viscoelastoplasticity model. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2003.
Find full textBook chapters on the topic "Model-based definitions"
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Kelley, David J., M. Amon Twyman, and S. Mason Dambrot. "Preliminary Mediated Artificial Superintelligence Study, Experimental Framework, and Definitions for an Independent Core Observer Model Cognitive Architecture-Based System." In Advances in Intelligent Systems and Computing, 202–10. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25719-4_26.
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Schleicher, Ansgar. "UML-based Process Model Definition." In Management of Development Processes, 103–48. Wiesbaden: Deutscher Universitätsverlag, 2002. http://dx.doi.org/10.1007/978-3-322-90811-7_4.
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Beetz, Jakob, André Borrmann, and Matthias Weise. "Process-Based Definition of Model Content." In Building Information Modeling, 127–38. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92862-3_6.
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Traverso, Alberto, Frank J. W. M. Dankers, Biche Osong, Leonard Wee, and Sander M. J. van Kuijk. "Diving Deeper into Models." In Fundamentals of Clinical Data Science, 121–33. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99713-1_9.
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AbstractPre-requisites to better understand the chapter: knowledge of the major steps and procedures of developing a clinical prediction model.Logical position of the chapter with respect to the previous chapter: in the last chapters, you have learned how to develop and validate a clinical prediction model. You have been learning logistic regression as main algorithm to build the model. However, several different more complex algorithms can be used to build a clinical prediction model. In this chapter, the main machine learning based algorithms will be presented to you.Learning objectives: you will be presented with the definitions of: machine learning, supervised and unsupervised learning. The major algorithms for the last two categories will be introduced.
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Lange, Christoph, Jörg Langkau, and Sebastian Bader. "The IDS Information Model: A Semantic Vocabulary for Sovereign Data Exchange." In Designing Data Spaces, 111–27. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-93975-5_7.
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AbstractThe Information Model of the International Data Spaces (IDS-IM) is the central integration enabler for the semantic interoperability in any IDS ecosystem. It contains the terms and relationships to describe the IDS components, their interactions, and conditions under which data exchange and usage is possible. It thus presents the common denominator for the IDS and the foundation for any IDS communication. As such, its evolution cycles are deeply related with the maturity process of the IDS itself. This chapter makes the following contributions related to the IDS Information Model: a brief overview of the vocabulary, its guiding principles, and general features is supplied. Based on these explanations, several upcoming aspects are discussed that reflect the latest state of discussions about the declaration and cryptographic assurance of identities and decentralized identifiers, and how these need to be treated to ensure compliance with the IDS principles.In addition, we explain the latest developments around the IDS Usage Contract Language, the module of the IDS-IM that expresses Usage Contracts, and data restrictions. These definitions are further implemented with infrastructure components, in particular the presented, newly specified Policy Information Point and the Participant Information Service of the IDS.
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Grönniger, Hans, Jan Oliver Ringert, and Bernhard Rumpe. "System Model-Based Definition of Modeling Language Semantics." In Formal Techniques for Distributed Systems, 152–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02138-1_10.
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Renzi, Pietro, and Alberto Franci. "EGIPSS model for the evaluation of performance in healthcare." In Proceedings e report, 167–72. Florence: Firenze University Press, 2021. http://dx.doi.org/10.36253/978-88-5518-461-8.32.
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The need to improve performance in the Italian healthcare sector and thereby optimise the availability and delivery of related services has long been recognised. The associated reforms and developmental programmes have meant that the focus of health services has moved from a means-based approach to a results-based approach; which was an essential step to enabling real performance improvements according to the new public management paradigm. What is essential is a means of measuring and evaluating changes in healthcare sector performance which will support policy-makers to provide transparency and accountability, in accordance with the Tallinn Charter. This is particularly relevant in the healthcare sector, where outcomes are critical. This paper examines the concept of performance and performance assessment in the healthcare sector; acknowledging the inherent difficulties caused by the complexity of the systems and the multiplicity of performance-related definitions involved. This latter point is illustrated by the fact that many international organisations, such as the WHO and the OECD, have used varying models to assess and compare the performance of health systems in different countries. The authors have compared and evaluated a wide range of models and have determined the merits of the EGIPSS (Évaluation Globale et Intégrée de la Performance des Systèmes de Santé) integrative model. This is based on Parson's theory of social action which specifies four functions necessary for an organisation to survive. EGIPSS takes into consideration the conceptual contributions of different organisations, and covers a comparatively large number of performance measurements. A detailed illustration of the methodology is presented, together with some healthcare-related results for the Republic of San Marino and parts of the Marche Region in Italy.
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Ohnishi, Atsushi, and Kiyoshi Agusa. "Japanese Software Requirements Definition Based on Requirements Frame Model." In Distributed Environments, 7–19. Tokyo: Springer Japan, 1991. http://dx.doi.org/10.1007/978-4-431-68144-1_2.
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Murali, Adithya, Lucas Peña, Christof Löding, and P. Madhusudan. "A First-Order Logic with Frames." In Programming Languages and Systems, 515–43. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44914-8_19.
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AbstractWe propose a novel logic, called Frame Logic (FL), that extends first-order logic (with recursive definitions) using a construct $$\textit{Sp}(\cdot )$$ Sp ( · ) that captures the implicit supports of formulas— the precise subset of the universe upon which their meaning depends. Using such supports, we formulate proof rules that facilitate frame reasoning elegantly when the underlying model undergoes change. We show that the logic is expressive by capturing several data-structures and also exhibit a translation from a precise fragment of separation logic to frame logic. Finally, we design a program logic based on frame logic for reasoning with programs that dynamically update heaps that facilitates local specifications and frame reasoning. This program logic consists of both localized proof rules as well as rules that derive the weakest tightest preconditions in FL.
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Cauli, Claudia, Magdalena Ortiz, and Nir Piterman. "Actions over Core-Closed Knowledge Bases." In Automated Reasoning, 281–99. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-10769-6_17.
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AbstractWe present new results on the application of semantic- and knowledge-based reasoning techniques to the analysis of cloud deployments. In particular, to the security of Infrastructure as Code configuration files, encoded as description logic knowledge bases. We introduce an action language to model mutating actions; that is, actions that change the structural configuration of a given deployment by adding, modifying, or deleting resources. We mainly focus on two problems: the problem of determining whether the execution of an action, no matter the parameters passed to it, will not cause the violation of some security requirement (static verification), and the problem of finding sequences of actions that would lead the deployment to a state where (un)desirable properties are (not) satisfied (plan existence and plan synthesis). For all these problems, we provide definitions, complexity results, and decision procedures.
Conference papers on the topic "Model-based definitions"
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Vernica, Teodor, Robert Lipman, and William Z. Bernstein. "Visualizing Model-Based Product Definitions in Augmented Reality." In ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-71329.
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Abstract Augmented reality (AR) technologies present immense potential for the design and manufacturing communities. However, coordinating traditional engineering data representations into AR systems without loss of context and information remains a challenge. A major barrier is the lack of interoperability between manufacturing-specific data models and AR-capable data representations. In response, we present a pipeline for porting standards-based Product Manufacturing Information (PMI) with three-dimensional (3D) model data into an AR scene. We demonstrate our pipeline by interacting with annotated parts while continuously tracking their pose and orientation. Our work provides insight on how to address fundamental issues related to interoperability between domain-specific models and AR systems.
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Hedberg, Thomas, Allison Barnard Feeney, and Vijay Srinivasan. "An Exposition of Recently Standardized Classifications of Information for Organizing Model-Based Definitions." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8336.
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Abstract ASME has published a new standard (ASME Y14.47) on model-based definition (MBD) organization practices. It is part of ASME’s series of standards on engineering product definition and related documentation practices. ASME Y14.47 introduces novel MBD-element classifications, which are based on industrial recommended practices in organizing and managing three-dimensional geometric models and related information of products. Such classifications form the technical basis for developing information models (e.g., as XML schema definitions) to enable interoperability among engineering information systems in model-based enterprises (MBEs). This paper provides an exposition of these classifications, while emphasizing the need and use of such standardized classifications in modern MBEs.
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Kulkarni, Anagha, and Jamie Callan. "Dictionary definitions based homograph identification using a generative hierarchical model." In the 46th Annual Meeting of the Association for Computational Linguistics. Morristown, NJ, USA: Association for Computational Linguistics, 2008. http://dx.doi.org/10.3115/1557690.1557713.
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Sommerville, Daniel V. "Scaling Laws for Model Test Based BWR Steam Dryer Fluctuating Load Definitions." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93703.
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In recent years some Boiling Water Reactors have experienced significant steam dryer cracking. In some cases this cracking has necessitated unplanned outages to implement steam dryer repairs and has also resulted in de-rated operation of the affected units. In response to these recent steam dryer failures, GE has initiated a research program focused on identifying the nature of the fluctuating loads experienced by the steam dryer and developing predictive methods that can be used to develop load definitions for steam dryers. The physical mechanisms responsible for excitation of aero-acoustic resonances are not easily modeled using purely analytic methods; therefore, GE has decided to perform model tests to investigate the nature of the expected steam dryer loading. The objectives of the study documented in this paper are to: 1) Provide guidance regarding how to preserve, in the model, the significant fluid phenomena occurring in the plant, and 2) Derive scaling laws to convert model data to plant load predictions.
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Ramirez, Juan C., Suzanne A. Smyth, and Russell A. Ogle. "Towards an Exergy-Based Explosion Energy Model for Boiling-Liquid Expanding-Vapor Explosions." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62228.
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A boiling liquid, expanding vapor explosion (BLEVE) occurs when a pressure vessel containing a superheated liquid undergoes a catastrophic failure, resulting in a violent vaporization of the liquid. The exposure of a pressure vessel to a fire is a classic scenario that can result in a BLEVE. The thermomechanical exergy of a pressure vessel’s contents provides — by definition — an upper bound on the work that can be performed by the system during the explosion. By fixing the values of ambient pressure and temperature (i.e., the dead state), exergy can be interpreted as another thermodynamic property. This rigorous and unambiguous definition makes it ideal to estimate the maximum energy of explosions. The numerical value of exergy depends on the definition of the dead state. In this paper we examine the effect of different definitions for the dead state on the explosion energy value. We consider two applications of this method: the contribution of the vapor head-space to the explosive energy as a function of the fractional liquid fill of the vessel, and the effect of the vessel burst pressure.
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Kuroda, Takayuki, and Aniruddha Gokhale. "Model-Based IT Change Management for Large System Definitions with State-Related Dependencies." In 2014 IEEE 18th International Enterprise Distributed Object Computing Conference (EDOC 2014). IEEE, 2014. http://dx.doi.org/10.1109/edoc.2014.31.
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Miller, Alexander McDermott, Nathan W. Hartman, Thomas Hedberg, Allison Barnard Feeney, and Jesse Zahner. "Towards Identifying the Elements of a Minimum Information Model for Use in a Model-Based Definition." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2979.
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The Model-Based Enterprise (MBE) paradigm is being adopted by manufacturing companies in a variety of industries. Companies benefit from enhanced visualization, documentation, and communication capabilities when 3D annotated product definitions, or Model-Based Definitions (MBD) replace two-dimensional drawings throughout an enterprise. It is critical that product information, much of which is defined implicitly in drawings, is not lost in this transition. This presents a challenge to authors and translators of 3D models used through the product lifecycle. They must understand the semantics of the product information typically presented by a drawing then explicitly include this information, in a computer-interpretable form, in the MBD. The research study described in this paper seeks to discover what is the minimum set of required information to carry out all the tasks in a given workflow of a model-based enterprise. A survey was conducted across various industry sectors to identify the foundational elements of this Minimum Information Model (MIM) in selected workflows. This study identified the information used within the specific workflows, the capabilities of 3D CAD models to carry this information, and the implications for doing so.
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Patel, Apurva, Joshua D. Summers, and Brian Davenport. "Defining Function: How Student Definitions Compare to Literature and Function Model Generation." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22523.
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Abstract The concept of “function” serves various purposes in engineering design, resulting in a variety of definitions for the same term. This paper presents an analysis of function definitions provided by mechanical engineering students as part of a larger protocol study on function modeling behaviors. This work investigates the relationships between student definitions of function and their corresponding completed function models. Student definitions are also compared to those found in literature using a topical analysis. Student definitions tend to skew towards one topic, whereas definitions in literature are found to be more likely to contain a combination of topics. Subsequently, student definitions are compared to the function models generated by students based on the size and completeness evaluation of models. Larger function models are found to be correlated to definitions that include terms such as “input/output” and “process”. Definitions that use terms such as “task” and “action” are found to have higher evaluation scores, but the differences are small in magnitude. In general, the activity of creating a function model was found to influence how students define function. Finally, limitations of the work are discussed along with future research directions.
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Li, Jing, and Guoxiong Peng. "An Improved Multi-Path Assignment Model Based on New Definitions of Efficient Links and Efficient Paths." In Second International Conference on Transportation and Traffic Studies (ICTTS ). Reston, VA: American Society of Civil Engineers, 2000. http://dx.doi.org/10.1061/40503(277)106.
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Tong, Shijie, Matthew P. Klein, and Jae Wan Park. "Comprehensive Battery Equivalent Circuit Based Model for Battery Management Application." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-4087.
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This paper presents a comprehensive control oriented battery model. Described first is an equivalent circuit based battery model which captures particular battery characteristics of control interest. Then, the model categorizes the battery dynamics based on their different time constants (transient, long-term, life-time). This model uses a 2-D map representing the temperature and state-of-charge dependent model parameters. Also, the model uses new battery state-of-charge and state-of-health definitions that are more practical for a real battery management system. Battery testing and simulation on various types of batteries and use scenarios was completed to validate that the model is easy to parameterize, computationally efficient and of adequate accuracy.
Reports on the topic "Model-based definitions"
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Drushlyak, Marina G., Olena V. Semenikhina, Volodymyr V. Proshkin, Serhii Ya Kharchenko, and Tetyana D. Lukashova. Methodology of formation of modeling skills based on a constructive approach (on the example of GeoGebra). [б. в.], June 2021. http://dx.doi.org/10.31812/123456789/4450.
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Author’s methodology of forming modeling skills involves 4 steps: Step 1 – the teacher step by step constructs the curve by means of cloud based service GeoGebra; Step 2 – the teacher offers a description- definition of the curve and provides a ready-made algorithm by which students model the curve inde- pendently in GeoGebra; Step 3 – the teacher offers an algorithm for constructing a curve model, and students need to characterize the properties of the curve or give its definition based on the results, Step 4 – students are offered definitions of curves that they have to model in GeoGebra). An example of realization of the author’s methodology is given, the pedagogical experiment on proof of its effectiveness is described.
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Hartman, Nathan W., and Jesse Zahner. Extending and Evaluating the Model-based Product Definition. National Institute of Standards and Technology, December 2017. http://dx.doi.org/10.6028/nist.gcr.18-015.
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McGee, Steven, Jennifer Kirby, Geneva Haertel, and Angela Haydel DeBarger. Taking students on a journey to El Yunque: An examination of cognitive apprenticeship. The Learning Partnership, April 2006. http://dx.doi.org/10.51420/conf.2006.1.
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The Journey to El Yunque program was designed using the cognitive apprenticeship model. Students analyze the same data that scientists in the rainforest use for their research, while at the same time, covering all of the national middle school ecology standards. In this study we seek to build a framework that integrates design-based research methods with traditional evaluation. The resulting enactment of the curriculum provides formative feedback about the curriculum as well as about the design model itself. An ecology assessment was developed using publicly released state assessment items. A quasiexperimental design study was used to evaluate the effectiveness of the beta version of the program. The results show that Journey to El Yunque was more effective at helping students learn population dynamics, while the traditional ecology curriculum was more effective at helping students understand energy flow definitions. This difference in performance is consistent with the underlying design based on the cognitive apprenticeship model.
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Cain, W. D., R. C. Jr Painter, and S. Matthews. Control and Management of Model-Based Product Definition for DP Tooling Designs. Office of Scientific and Technical Information (OSTI), September 2000. http://dx.doi.org/10.2172/768766.
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Thieschafer, Cheryl L. Definition of Roles and Responsibilities of Health Care Team Members in a Population-Based Model of Primary Health Care Delivery. Fort Belvoir, VA: Defense Technical Information Center, June 1997. http://dx.doi.org/10.21236/ada372084.
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Apostolatos, A., R. Rossi, and C. Soriano. D7.2 Finalization of "deterministic" verification and validation tests. Scipedia, 2021. http://dx.doi.org/10.23967/exaqute.2021.2.006.
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This deliverable focus on the verification and validation of the solvers of Kratos Multiphysics which are used within ExaQUte. These solvers comprise standard body-fitted approaches and novel embedded approaches for the Computational Fluid Dynamics (CFD) simulations carried out within ExaQUte. Firstly, the standard body-fitted CFD solver is validated on a benchmark problem of high rise building - CAARC benchmark and subsequently the novel embedded CFD solver is verified against the solution of the body-fitted solver. Especially for the novel embedded approach, a workflow is presented on which the exact parameterized Computer-Aided Design (CAD) model is used in an efficient manner for the underlying CFD simulations. It includes: A note on the space-time methods Verification results for the body-fitted solver based on the CAARC benchmark Workflow consisting of importing an exact CAD model, tessellating it and performing embedded CFD on it Verification results for the embedded solver based on a high-rise building API definition and usage
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Carter, T. R., C. E. Logan, J K Clark, H. A. J. Russell, E. H. Priebe, and S. Sun. A three-dimensional bedrock hydrostratigraphic model of southern Ontario. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/331098.
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A hydrostratigraphic framework has been developed for southern Ontario consisting of 15 hydrostratigraphic units and 3 regional hydrochemical regimes. Using this framework, the 54 layer 3-D lithostratigraphic model has been converted into a 15 layer 3-D hydrostratigraphic model. Layers are expressed as either aquifer or aquitard based principally on hydrogeologic characteristics, in particular the permeability and the occurrence/absence of groundwater when intersected by a water well or petroleum well. Hydrostratigraphic aquifer units are sub-divided into up to three distinct hydrochemical regimes: brines (deep), brackish-saline sulphur water (intermediate), and fresh (shallow). The hydrostratigraphic unit assignment provides a standard nomenclature and definition for regional flow modelling of potable water and deeper fluids. Included in the model are: 1) 3-D hydrostratigraphic units, 2) 3-D hydrochemical fluid zones within aquifers, 3) 3-D representations of oil and natural gas reservoirs which form an integral part of the intermediate to deep groundwater regimes, 4) 3-D fluid level surfaces for deep Cambrian brines, for brines and fresh to sulphurous groundwater in the Guelph Aquifer, and the fresh to sulphurous groundwater of the Bass Islands Aquifer and Lucas-Dundee Aquifer, 5) inferred shallow karst, 6) base of fresh water, 7) Lockport Group TDS, and 8) the 3-D lithostratigraphy. The 3-D hydrostratigraphic model is derived from the lithostratigraphic layers of the published 3-D geological model. It is constructed using Leapfrog Works at 400 m grid scale and is distributed in a proprietary format with free viewer software as well as industry standard formats.
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Skelly, Andrea C., Roger Chou, Joseph R. Dettori, Erika D. Brodt, Andrea Diulio-Nakamura, Kim Mauer, Rongwei Fu, et al. Integrated and Comprehensive Pain Management Programs: Effectiveness and Harms. Agency for Healthcare Research and Quality (AHRQ), October 2021. http://dx.doi.org/10.23970/ahrqepccer251.
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Objectives. To evaluate the effectiveness and harms of pain management programs that are based on the biopsychosocial model of care, particularly in the Medicare population. Data sources. Electronic databases (Ovid® MEDLINE®, PsycINFO®, CINAHL®, Cochrane Central Register of Controlled Trials, and Cochrane Database of Systematic Reviews) from 1989 to May 24, 2021; reference lists; and a Federal Register notice. Review methods. Given lack of consensus on terminology and program definition for pain management, we defined programs as integrated (based in and integrated with primary care) and comprehensive (referral based and separate from primary care) pain management programs (IPMPs and CPMPs). Using predefined criteria and dual review, we selected randomized controlled trials (RCTs) comparing IPMPs and CPMPs with usual care or waitlist, physical activity, pharmacologic therapy, and psychological therapy in patients with complex acute/subacute pain or chronic nonactive cancer pain. Patients needed to have access to medication support/review, psychological support, and physical function support in programs. Meta-analyses were conducted to improve estimate precision. We classified the magnitude of effects as small, moderate, or large based on predefined criteria. Strength of evidence (SOE) was assessed for the primary outcomes of pain, function, and change in opioid use. Results. We included 57 RCTs; 8 evaluated IPMPs and 49 evaluated CPMPs. Compared with usual care or waitlist, IPMPs were associated with small improvements in pain in the short and intermediate term (SOE: low) and in function in the short term (SOE: moderate), but there were no clear differences at other time points. CPMPs were associated with small improvements in pain immediately postintervention (SOE: moderate) but no differences in the short, intermediate, and long term (SOE: low); for function, improvements were moderate immediately postintervention and in the short term; there were no differences in the intermediate or long term (SOE: low at all time points). CPMPs were associated with small to moderate improvements in function and pain versus pharmacologic treatment alone at multiple time frames (SOE: moderate for function intermediate term; low for pain and function at all other times), and with small improvements in function but no improvements in pain in the short term when compared with physical activity alone (SOE: moderate). There were no differences between CPMPs and psychological therapy alone at any time (SOE: low). Serious harms were not reported, although evidence on harms was insufficient. The mean age was 57 years across IPMP RCTs and 45 years across CPMP RCTs. None of the trials specifically enrolled Medicare beneficiaries. Evidence on factors related to program structure, delivery, coordination, and components that may impact outcomes is sparse and there was substantial variability across studies on these factors. Conclusions. IPMPs and CPMPs may provide small to moderate improvements in function and small improvements in pain in patients with chronic pain compared with usual care. Formal pain management programs have not been widely implemented in the United States for general populations or the Medicare population. To the extent that programs are tailored to patients’ needs, our findings are potentially applicable to the Medicare population. Programs that address a range of biopsychosocial aspects of pain, tailor components to patient need, and coordinate care may be of particular importance in this population.
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Elbaum, Michael, and Peter J. Christie. Type IV Secretion System of Agrobacterium tumefaciens: Components and Structures. United States Department of Agriculture, March 2013. http://dx.doi.org/10.32747/2013.7699848.bard.
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Objectives: The overall goal of the project was to build an ultrastructural model of the Agrobacterium tumefaciens type IV secretion system (T4SS) based on electron microscopy, genetics, and immunolocalization of its components. There were four original aims: Aim 1: Define the contributions of contact-dependent and -independent plant signals to formation of novel morphological changes at the A. tumefaciens polar membrane. Aim 2: Genetic basis for morphological changes at the A. tumefaciens polar membrane. Aim 3: Immuno-localization of VirB proteins Aim 4: Structural definition of the substrate translocation route. There were no major revisions to the aims, and the work focused on the above questions. Background: Agrobacterium presents a unique example of inter-kingdom gene transfer. The process involves cell to cell transfer of both protein and DNA substrates via a contact-dependent mechanism akin to bacterial conjugation. Transfer is mediated by a T4SS. Intensive study of the Agrobacterium T4SS has made it an archetypal model for the genetics and biochemistry. The channel is assembled from eleven protein components encoded on the B operon in the virulence region of the tumor-inducing plasmid, plus an additional coupling protein, VirD4. During the course of our project two structural studies were published presenting X-ray crystallography and three-dimensional reconstruction from electron microscopy of a core complex of the channel assembled in vitro from homologous proteins of E. coli, representing VirB7, VirB9, and VirB10. Another study was published claiming that the secretion channels in Agrobacterium appear on helical arrays around the membrane perimeter and along the entire length of the bacterium. Helical arrangements in bacterial membranes have since fallen from favor however, and that finding was partially retracted in a second publication. Overall, the localization of the T4SS within the bacterial membranes remains enigmatic in the literature, and we believe that our results from this project make a significant advance. Summary of achievements : We found that polar inflations and other membrane disturbances relate to the activation conditions rather than to virulence protein expression. Activation requires low pH and nutrient-poor medium. These stress conditions are also reflected in DNA condensation to varying degrees. Nonetheless, they must be considered in modeling the T4SS as they represent the relevant conditions for its expression and activity. We identified the T4SS core component VirB7 at native expression levels using state of the art super-resolution light microscopy. This marker of the secretion system was found almost exclusively at the cell poles, and typically one pole. Immuno-electron microscopy identified the protein at the inner membrane, rather than at bridges across the inner and outer membranes. This suggests a rare or transient assembly of the secretion-competent channel, or alternatively a two-step secretion involving an intermediate step in the periplasmic space. We followed the expression of the major secreted effector, VirE2. This is a single-stranded DNA binding protein that forms a capsid around the transferred oligonucleotide, adapting the bacterial conjugation to the eukaryotic host. We found that over-expressed VirE2 forms filamentous complexes in the bacterial cytoplasm that could be observed both by conventional fluorescence microscopy and by correlative electron cryo-tomography. Using a non-retentive mutant we observed secretion of VirE2 from bacterial poles. We labeled the secreted substrates in vivo in order detect their secretion and appearance in the plant cells. However the low transfer efficiency and significant background signal have so far hampered this approach.
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Daudelin, Francois, Lina Taing, Lucy Chen, Claudia Abreu Lopes, Adeniyi Francis Fagbamigbe, and Hamid Mehmood. Mapping WASH-related disease risk: A review of risk concepts and methods. United Nations University Institute for Water, Environment and Health, December 2021. http://dx.doi.org/10.53328/uxuo4751.
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The report provides a review of how risk is conceived of, modelled, and mapped in studies of infectious water, sanitation, and hygiene (WASH) related diseases. It focuses on spatial epidemiology of cholera, malaria and dengue to offer recommendations for the field of WASH-related disease risk mapping. The report notes a lack of consensus on the definition of disease risk in the literature, which limits the interpretability of the resulting analyses and could affect the quality of the design and direction of public health interventions. In addition, existing risk frameworks that consider disease incidence separately from community vulnerability have conceptual overlap in their components and conflate the probability and severity of disease risk into a single component. The report identifies four methods used to develop risk maps, i) observational, ii) index-based, iii) associative modelling and iv) mechanistic modelling. Observational methods are limited by a lack of historical data sets and their assumption that historical outcomes are representative of current and future risks. The more general index-based methods offer a highly flexible approach based on observed and modelled risks and can be used for partially qualitative or difficult-to-measure indicators, such as socioeconomic vulnerability. For multidimensional risk measures, indices representing different dimensions can be aggregated to form a composite index or be considered jointly without aggregation. The latter approach can distinguish between different types of disease risk such as outbreaks of high frequency/low intensity and low frequency/high intensity. Associative models, including machine learning and artificial intelligence (AI), are commonly used to measure current risk, future risk (short-term for early warning systems) or risk in areas with low data availability, but concerns about bias, privacy, trust, and accountability in algorithms can limit their application. In addition, they typically do not account for gender and demographic variables that allow risk analyses for different vulnerable groups. As an alternative, mechanistic models can be used for similar purposes as well as to create spatial measures of disease transmission efficiency or to model risk outcomes from hypothetical scenarios. Mechanistic models, however, are limited by their inability to capture locally specific transmission dynamics. The report recommends that future WASH-related disease risk mapping research: - Conceptualise risk as a function of the probability and severity of a disease risk event. Probability and severity can be disaggregated into sub-components. For outbreak-prone diseases, probability can be represented by a likelihood component while severity can be disaggregated into transmission and sensitivity sub-components, where sensitivity represents factors affecting health and socioeconomic outcomes of infection. -Employ jointly considered unaggregated indices to map multidimensional risk. Individual indices representing multiple dimensions of risk should be developed using a range of methods to take advantage of their relative strengths. -Develop and apply collaborative approaches with public health officials, development organizations and relevant stakeholders to identify appropriate interventions and priority levels for different types of risk, while ensuring the needs and values of users are met in an ethical and socially responsible manner. -Enhance identification of vulnerable populations by further disaggregating risk estimates and accounting for demographic and behavioural variables and using novel data sources such as big data and citizen science. This review is the first to focus solely on WASH-related disease risk mapping and modelling. The recommendations can be used as a guide for developing spatial epidemiology models in tandem with public health officials and to help detect and develop tailored responses to WASH-related disease outbreaks that meet the needs of vulnerable populations. The report’s main target audience is modellers, public health authorities and partners responsible for co-designing and implementing multi-sectoral health interventions, with a particular emphasis on facilitating the integration of health and WASH services delivery contributing to Sustainable Development Goals (SDG) 3 (good health and well-being) and 6 (clean water and sanitation).