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The Global ETD Search service is a free service for researchers
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Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 21 to 30 of 36 (0.052 seconds)Spelling suggestions: "subject:"modellierung"" "subject:"modelliert""
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Visual Modeling of Integrated Constructs in Mathematics As the Base of Future Teacher CreativitySmirnov, Eugeny, Burukhin, Sergei, Smirnova, Irina 09 May 2012 (has links)
Visual modeling concept of integrated constructs (essence) of mathematical objects in teacher training of humanistic area is presented as technology of education in problem solving. The main goal of innovative approach is student’s activity in mathematics on generating of concrete essence manifestations on concepts, methods, theorems, algorithms, procedures and so on. Such student’s activity should be:
· Success in an area of actual interests and person’s experience and reached by perception;
· Have high level of variability in visual modeling;
· Success in domain of reflection process stimulation.
Similar creative behavior of persons is typical for actors, dancing, and figure skating and so on.
Now we show that such technology will be fruitful for teacher training in mathematics for humanistic specialties.
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Improving Execution Speed of Models Implemented in NetLogoRailsback, Steven, Ayllón, Daniel, Berger, Uta, Grimm, Volker, Lytinen, Steven, Sheppard, Colin, Thiele, Jan C. 30 March 2017 (has links) (PDF)
NetLogo has become a standard platform for agent-based simulation, yet there appears to be widespread belief that it is not suitable for large and complex models due to slow execution. Our experience does not support that belief. NetLogo programs often do run very slowly when written to minimize code length and maximize clarity, but relatively simple and easily tested changes can almost always produce major increases in execution speed. We recommend a five-step process for quantifying execution speed, identifying slow parts of code, and writing faster code. Avoiding or improving agent filtering statements can often produce dramatic speed improvements. For models with extensive initialization methods, reorganizing the setup procedure can reduce the initialization effort in simulation experiments. Programming the same behavior in a different way can sometimes provide order-of-magnitude speed increases. For models in which most agents do nothing on most time steps, discrete event simulation—facilitated by the time extension to NetLogo—can dramatically increase speed. NetLogo’s BehaviorSpace tool makes it very easy to conduct multiple-model-run experiments in parallel on either desktop or high performance cluster computers, so even quite slow models can be executed thousands of times. NetLogo also is supported by efficient analysis tools, such as BehaviorSearch and RNetLogo, that can reduce the number of model runs and the effort to set them up for (e.g.) parameterization and sensitivity analysis.
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Solids of Revolution – from the Integration of a given Function to the Modelling of a Problem with the help of CAS and GeoGebraWurnig, Otto 22 May 2012 (has links) (PDF)
After the students in high school have learned to integrate a function, the calculation of the volume of a solid of revolution, like a rotated parabola, is taken as a good applied example. The next step is to calculate the volume of an object of reality which is interpreted as a solid of revolution of a given function f(x). The students do all these
calculations in the same way and get the same result. Consequently the teachers can easily decide if a result is right or wrong. If the students have learned to work with a graphical or CAS calculator, they can calculate the volume of solids of revolution in reality by modelling a possible fitted function f(x). Every student has to decide which points of the curve that generates the solid of revolution can be taken and which function will suitably fit the curve. In Austrian high schools teachers use GeoGebra as a software which allows you to insert photographs or scanned material in the geometric window as a
background picture. In this case the student and the teacher can control if the graph of the calculated function will fit the generating curve in a useful way.
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| 24 |
Problem-centred teaching and modelling as bridges to the 21st century in primary school mathematics classroomsBiccard, P., Wessels, D. C. J. 15 February 2012 (has links) (PDF)
No description available.
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| 25 |
Using a modelling task to Elicit Reasoning about dataWessels, Helena 20 March 2012 (has links) (PDF)
No description available.
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| 26 |
Solids of Revolution – from the Integration of a given Functionto the Modelling of a Problem with the help of CAS and GeoGebraWurnig, Otto 22 May 2012 (has links)
After the students in high school have learned to integrate a function, the calculation of the volume of a solid of revolution, like a rotated parabola, is taken as a good applied example. The next step is to calculate the volume of an object of reality which is interpreted as a solid of revolution of a given function f(x). The students do all these
calculations in the same way and get the same result. Consequently the teachers can easily decide if a result is right or wrong. If the students have learned to work with a graphical or CAS calculator, they can calculate the volume of solids of revolution in reality by modelling a possible fitted function f(x). Every student has to decide which points of the curve that generates the solid of revolution can be taken and which function will suitably fit the curve. In Austrian high schools teachers use GeoGebra as a software which allows you to insert photographs or scanned material in the geometric window as a
background picture. In this case the student and the teacher can control if the graph of the calculated function will fit the generating curve in a useful way.
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| 27 |
Improving Execution Speed of Models Implemented in NetLogoRailsback, Steven, Ayllón, Daniel, Berger, Uta, Grimm, Volker, Lytinen, Steven, Sheppard, Colin, Thiele, Jan C. 30 March 2017 (has links)
NetLogo has become a standard platform for agent-based simulation, yet there appears to be widespread belief that it is not suitable for large and complex models due to slow execution. Our experience does not support that belief. NetLogo programs often do run very slowly when written to minimize code length and maximize clarity, but relatively simple and easily tested changes can almost always produce major increases in execution speed. We recommend a five-step process for quantifying execution speed, identifying slow parts of code, and writing faster code. Avoiding or improving agent filtering statements can often produce dramatic speed improvements. For models with extensive initialization methods, reorganizing the setup procedure can reduce the initialization effort in simulation experiments. Programming the same behavior in a different way can sometimes provide order-of-magnitude speed increases. For models in which most agents do nothing on most time steps, discrete event simulation—facilitated by the time extension to NetLogo—can dramatically increase speed. NetLogo’s BehaviorSpace tool makes it very easy to conduct multiple-model-run experiments in parallel on either desktop or high performance cluster computers, so even quite slow models can be executed thousands of times. NetLogo also is supported by efficient analysis tools, such as BehaviorSearch and RNetLogo, that can reduce the number of model runs and the effort to set them up for (e.g.) parameterization and sensitivity analysis.
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Problem-centred teaching and modelling as bridges to the 21st century in primary school mathematics classroomsBiccard, P., Wessels, D. C. J. 15 February 2012 (has links)
No description available.
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| 29 |
Teaching Mathematical Modelling to Tomorrow's Mathematicians or, You too can make a million dollars predicting football resultsThomas, Kerry J. 20 March 2012 (has links) (PDF)
No description available.
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| 30 |
Modelling and Design of a Test Rig to investigate the dynamic behaviour of a Servo driven Powertrain / Modellierung und Entwurf eines Versuchsstandes zur Untersuchung des dynamischen Verhaltens eines servogetriebenen AntriebsstrangesWittwer, Max 26 March 2018 (has links) (PDF)
In the present work a simulation model for examining the fundamental dynamic behaviour of a servo driven powertrain is developed. This powertrain consists of a permanent magnet synchronous motor, a cycloidal gearbox and a torque motor to apply a load. On basis of this model the selection of components for the design of a test rig is possible. This leads to the constructive draft of the test rig.
In order to model the system, the fundamentals give a brief overview of the components incorporated in the test rig system. With ais of the specified task the simulation purpose is defined and the modelling process enabled. The subsequent system analysis is performed intensively to decompose the system into subsystems, which are then investigated to find the optimal modelling approach for the given simulation task. Particular emphasis is put on the investigation of the cycloidal gearbox subsystem and it shows, that approaches for modelling the dynamic behaviour of the gearbox as a whole have only been published partially.
Therefore, the available modelling approaches are analysed and suitable models are developed as conceptual models. Those will be formalised and implemented in Matlab/Simulink. The model is verified and simulation experiments are performed, that help in the selection of suitable test rig components. On basis of a flexible test rig, finally the constructive draft is presented.
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