C. Agu, Marianne S. Eikeland, Lars-André Tokheim, Britt M. E. Moldestad
The behaviour of a fluidized bed can be modeled based on the Euler-Euler approach. This method has been fully utilized in both three-dimensional (3D) and twodimensional (2D) systems for obtaining, for example, the axial and radial distribution of fluidized bed properties. However, the bed property such as void fraction distribution along the flow direction can be of great interest for a design purpose. To save computational cost, an appropriate one-dimensional (1D) model can be used to obtain the average bed property along the vertical axis of a fluidized bed. In this paper, a 1D model based on the Euler-Euler method is presented. The results show that the model can be used to describe the behaviour of a fluidized bed. With a reasonable accuracy, the results also show that the 1D model can predict the minimum fluidization velocity and the superficial gas velocity at the onset of slugging regime.
{"title":"Simulation of Bubbling Fluidized Bed using a One-Dimensional Model Based on the Euler-Euler Method","authors":"C. Agu, Marianne S. Eikeland, Lars-André Tokheim, Britt M. E. Moldestad","doi":"10.3384/ECP17142575","DOIUrl":"https://doi.org/10.3384/ECP17142575","url":null,"abstract":"The behaviour of a fluidized bed can be modeled based on the Euler-Euler approach. This method has been fully utilized in both three-dimensional (3D) and twodimensional (2D) systems for obtaining, for example, the axial and radial distribution of fluidized bed properties. However, the bed property such as void fraction distribution along the flow direction can be of great interest for a design purpose. To save computational cost, an appropriate one-dimensional (1D) model can be used to obtain the average bed property along the vertical axis of a fluidized bed. In this paper, a 1D model based on the Euler-Euler method is presented. The results show that the model can be used to describe the behaviour of a fluidized bed. With a reasonable accuracy, the results also show that the 1D model can predict the minimum fluidization velocity and the superficial gas velocity at the onset of slugging regime.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72890070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper proposes a learning support system of musical representation by piano using teacher’s example of musical expression that is generated based on impression expressed by an adjective with our musical expression generation system. The system evaluates learner’s performance comparing with teacher’s example using a Kansei space and fuzzy rules expressing the relationship between musical expression and impression. The system presents good points of learner’s performance and advice by text to a learner for improvement of learner’s musical representation. A learner tries to improve his/her own performance based on system’s advice, and the system presents other advice again. From the experimental results, it is show that the proposed system is useful to learn musical representation and an approach of the proposed system is suitable because the affirmative evaluation is obtained from the participants who have taken piano lesson. On the other hand, it is found that to learn musical representation is difficult using the proposed system for learner of low-performance skills.
{"title":"Application of Musical Expression Generation System to Learning Support of Musical Representation","authors":"Mio Suzuki","doi":"10.3384/ecp171421088","DOIUrl":"https://doi.org/10.3384/ecp171421088","url":null,"abstract":"This paper proposes a learning support system of musical representation by piano using teacher’s example of musical expression that is generated based on impression expressed by an adjective with our musical expression generation system. The system evaluates learner’s performance comparing with teacher’s example using a Kansei space and fuzzy rules expressing the relationship between musical expression and impression. The system presents good points of learner’s performance and advice by text to a learner for improvement of learner’s musical representation. A learner tries to improve his/her own performance based on system’s advice, and the system presents other advice again. From the experimental results, it is show that the proposed system is useful to learn musical representation and an approach of the proposed system is suitable because the affirmative evaluation is obtained from the participants who have taken piano lesson. On the other hand, it is found that to learn musical representation is difficult using the proposed system for learner of low-performance skills.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73263925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The development of steel products with various characteristics increases the need for timely and preventive maintenance and condition monitoring of the production machinery. For instance, the roller levelers at modern steel factories are exposed to a high variation of forces due to the large range of steels leveled. In this study, the vibration measured from a steel leveler used for cold steel strips is analyzed with the goal to identify the effects different operational conditions have. Features such as generalized norms, generalized norm sums and the crest factor are computed from the vibration signals. The effects of the steel strip properties and the operational parameters of the machine on these features are then analyzed. The obtained information can be utilized in the models that are used as planning tools for the preventive maintenance of the steel leveler.
{"title":"The Effect of Steel Leveler Parameters on Vibration Feature","authors":"Riku-Pekka Nikula, K. Karioja","doi":"10.3384/ECP17142433","DOIUrl":"https://doi.org/10.3384/ECP17142433","url":null,"abstract":"The development of steel products with various characteristics increases the need for timely and preventive maintenance and condition monitoring of the production machinery. For instance, the roller levelers at modern steel factories are exposed to a high variation of forces due to the large range of steels leveled. In this study, the vibration measured from a steel leveler used for cold steel strips is analyzed with the goal to identify the effects different operational conditions have. Features such as generalized norms, generalized norm sums and the crest factor are computed from the vibration signals. The effects of the steel strip properties and the operational parameters of the machine on these features are then analyzed. The obtained information can be utilized in the models that are used as planning tools for the preventive maintenance of the steel leveler.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82025190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The commissioning of the entire control system using a digital shadow of the machine offers extensive advantages in industrial control engineering for machine manufacturers and machine integrators. The growing use of a Hardware-in-the-Loop Simulation (HiLS) in the engineering process is accompanied by the steady increase in demands regarding model depth and model scope of the virtual machine. Especially in the area of material flow simulation, currently used simulation setups of HiL-Simulators reach their limits because of the limitation on a single simulation solver. This paper presents an approach on how a virtual machine could be realized based on several interlinked simulation solvers connected by a multi-rate approach to increase the model depth and model scope.
{"title":"Hardware-in-the-Loop Simulation for Machines based on a Multi-Rate Approach","authors":"Christian Scheifele, A. Verl","doi":"10.3384/ECP17142715","DOIUrl":"https://doi.org/10.3384/ECP17142715","url":null,"abstract":"The commissioning of the entire control system using a digital shadow of the machine offers extensive advantages in industrial control engineering for machine manufacturers and machine integrators. The growing use of a Hardware-in-the-Loop Simulation (HiLS) in the engineering process is accompanied by the steady increase in demands regarding model depth and model scope of the virtual machine. Especially in the area of material flow simulation, currently used simulation setups of HiL-Simulators reach their limits because of the limitation on a single simulation solver. This paper presents an approach on how a virtual machine could be realized based on several interlinked simulation solvers connected by a multi-rate approach to increase the model depth and model scope.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79410574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Water pressure and flow rate calculation in dynamic boiler models is challenging because of stiff system dynamics meaning that time constants of model states vary by several orders of magnitude. Furthermore, strong interconnections between pressures and flow variables may cause instability problems in simulation runs. This study presents a method to implement and test dynamic thermal power plant water-steam system models. A dynamic water-steam system model is presented. The model is applied for testing of the functionality of the presented computation model. Computational performance was tested using different numerical solvers. Also sensitivity to changes in initial values of system states and model parameters was tested. The results indicate that a workable way to make flexible models was found.
{"title":"Functionality Testing of Water Pressure and Flow Calculation for Dynamic Power Plant Modelling","authors":"Timo Yli-Fossi","doi":"10.3384/ecp17142905","DOIUrl":"https://doi.org/10.3384/ecp17142905","url":null,"abstract":"Water pressure and flow rate calculation in dynamic boiler models is challenging because of stiff system dynamics meaning that time constants of model states vary by several orders of magnitude. Furthermore, strong interconnections between pressures and flow variables may cause instability problems in simulation runs. This study presents a method to implement and test dynamic thermal power plant water-steam system models. A dynamic water-steam system model is presented. The model is applied for testing of the functionality of the presented computation model. Computational performance was tested using different numerical solvers. Also sensitivity to changes in initial values of system states and model parameters was tested. The results indicate that a workable way to make flexible models was found.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85357278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Dahlquist, M. Naqvi, E. Thorin, Jinyue Yan, K. Kyprianidis, P. Hartwell
The energy situation in both process industries andpower plants is changing. It is becoming interesting toperform system analysis on how to integrate gasificationinto chemical recovery systems in t ...
{"title":"Modeling of Black Liquor Gasification","authors":"E. Dahlquist, M. Naqvi, E. Thorin, Jinyue Yan, K. Kyprianidis, P. Hartwell","doi":"10.3384/ECP17142885","DOIUrl":"https://doi.org/10.3384/ECP17142885","url":null,"abstract":"The energy situation in both process industries andpower plants is changing. It is becoming interesting toperform system analysis on how to integrate gasificationinto chemical recovery systems in t ...","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80536760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper compares the development of multi-chaotic system during the optimization process on three classical benchmark functions – Rosenbrock, Rastrigin and Ackley. The multi-chaotic system involves five different randomizations based on discrete chaotic maps (Burgers, Delayed Logistic, Dissipative, Lozi and Tinkerbell) and the probability of their selection is adjusted according to the development of the optimization task. Two variants of Differential Evolution (DE) are used in order to simulate the effect of adaptivity on the randomization probability adjustment process. First non-adaptive variant is DE with rand/1 mutation strategy and the second adaptive variant is novel Success-History based Adaptive DE (SHADE).
{"title":"Simulating the Effect of Adaptivity on Randomization","authors":"Adam Viktorin, R. Šenkeřík, Michal Pluhacek","doi":"10.3384/ECP17142525","DOIUrl":"https://doi.org/10.3384/ECP17142525","url":null,"abstract":"This paper compares the development of multi-chaotic system during the optimization process on three classical benchmark functions – Rosenbrock, Rastrigin and Ackley. The multi-chaotic system involves five different randomizations based on discrete chaotic maps (Burgers, Delayed Logistic, Dissipative, Lozi and Tinkerbell) and the probability of their selection is adjusted according to the development of the optimization task. Two variants of Differential Evolution (DE) are used in order to simulate the effect of adaptivity on the randomization probability adjustment process. First non-adaptive variant is DE with rand/1 mutation strategy and the second adaptive variant is novel Success-History based Adaptive DE (SHADE).","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81479522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper deals with modelling, simulation and control of a laboratory crane for the purpose of control education. There were many similar activities in the past with realisations in causal modelling e.g. Matlab-Simulink. However we wanted to model and control the set-up also in the OO and multi-domain environment Dymola-Modelica using library components instead of mathematical equations to show all the advantages of such approach. The combination with some causal structures to solve certain problems is also discussed. The model was properly validated with some open and closed loop experiments. These results confirm the applicability of the model and the efficiency of the mentioned approach in modern control engineering courses.
{"title":"OO Modelling and Control of a Laboratory Crane for the Purpose of Control Education","authors":"B. Zupančič, P. Vintar","doi":"10.3384/ECP17142409","DOIUrl":"https://doi.org/10.3384/ECP17142409","url":null,"abstract":"The paper deals with modelling, simulation and control of a laboratory crane for the purpose of control education. There were many similar activities in the past with realisations in causal modelling e.g. Matlab-Simulink. However we wanted to model and control the set-up also in the OO and multi-domain environment Dymola-Modelica using library components instead of mathematical equations to show all the advantages of such approach. The combination with some causal structures to solve certain problems is also discussed. The model was properly validated with some open and closed loop experiments. These results confirm the applicability of the model and the efficiency of the mentioned approach in modern control engineering courses.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82931695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We experience various phenomena (e.g., rain, snow, and earthquake) in the physical world, while we carry out various actions (e.g., posting, querying, and e-shopping) in the Web world. Many researches have tried to mine the Web for knowledge about various phenomena in the physical world, and also several Web services using Webmined knowledge have been made available for the public. Meanwhile, the previous papers have introduced various kinds of “Web Sensors” with Temporal Shift, Temporal Propagation, and Geospatial Propagation to sense the Web for knowledge about a targeted physical phenomenon, i.e., to extract its spatiotemporal data sensitively by analyzing big data on the Web (e.g., Web documents, Web query logs, and e-shopping logs), and compared them based on their correlation coefficients with Japan Meteorological Agency’s physically-sensed spatiotemporal statistics to ensure the accuracy of Web-sensed spatiotemporal data sufficiently. As an industrial application of Web Sensors to a problem of the loss or error of physically-sensed spatiotemporal data due to some sort of troubles (e.g., temporary faults of JMA’s observatories), this paper tries to enable Web Sensors to interpolate lost spatiotemporal data of physical statistics by regression analysis. Keywords-Spatiotemporal Data Mining; Big Data Analysis;
{"title":"Interpolating Lost Spatio-Temporal Data by Web Sensors","authors":"Shun Hattori","doi":"10.3384/ECP171421048","DOIUrl":"https://doi.org/10.3384/ECP171421048","url":null,"abstract":"We experience various phenomena (e.g., rain, snow, and earthquake) in the physical world, while we carry out various actions (e.g., posting, querying, and e-shopping) in the Web world. Many researches have tried to mine the Web for knowledge about various phenomena in the physical world, and also several Web services using Webmined knowledge have been made available for the public. Meanwhile, the previous papers have introduced various kinds of “Web Sensors” with Temporal Shift, Temporal Propagation, and Geospatial Propagation to sense the Web for knowledge about a targeted physical phenomenon, i.e., to extract its spatiotemporal data sensitively by analyzing big data on the Web (e.g., Web documents, Web query logs, and e-shopping logs), and compared them based on their correlation coefficients with Japan Meteorological Agency’s physically-sensed spatiotemporal statistics to ensure the accuracy of Web-sensed spatiotemporal data sufficiently. As an industrial application of Web Sensors to a problem of the loss or error of physically-sensed spatiotemporal data due to some sort of troubles (e.g., temporary faults of JMA’s observatories), this paper tries to enable Web Sensors to interpolate lost spatiotemporal data of physical statistics by regression analysis. Keywords-Spatiotemporal Data Mining; Big Data Analysis;","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78743643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Emergency officers could often benefit from a route planning system that is based on constant traffic monitoring and complex decision making, seeking to give victims another breath of hope by assisting emergency units with reaching them on time. The main challenge is providing responses in a continuously evolving environment within a prescribed time frame, while using limited resources and information that is often incomplete or uncertain. This paper presents a route control concept for emergency vehicles through urban traffic. The proposed genetic controller is designed to dynamically reassess the route while the vehicle passes through the road network, continuously generating new routes based on current traffic. The algorithm is tested in an agent based simulation model that includes both traffic participants and a distributed traffic control system.
{"title":"Controlling Emergency Vehicles in Urban Traffic with Genetic Algorithms","authors":"M. Pătrașcu, Vlad Constantinescu, Andreea Ion","doi":"10.3384/ECP17142243","DOIUrl":"https://doi.org/10.3384/ECP17142243","url":null,"abstract":"Emergency officers could often benefit from a route planning system that is based on constant traffic monitoring and complex decision making, seeking to give victims another breath of hope by assisting emergency units with reaching them on time. The main challenge is providing responses in a continuously evolving environment within a prescribed time frame, while using limited resources and information that is often incomplete or uncertain. This paper presents a route control concept for emergency vehicles through urban traffic. The proposed genetic controller is designed to dynamically reassess the route while the vehicle passes through the road network, continuously generating new routes based on current traffic. The algorithm is tested in an agent based simulation model that includes both traffic participants and a distributed traffic control system.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89388124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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