The Experts below are selected from a list of 105 Experts worldwide ranked by ideXlab platform
Janez Grum - One of the best experts on this subject based on the ideXlab platform.
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optimisation of welding parameters in pulsed mig mag welding with width controlled sine wave current pulses part 1 determination of a general synergic equation and a normalised Parametric Diagram with a defined Parametric welding range
International Journal of Materials & Product Technology, 2007Co-Authors: Danijel Langus, Viljem Kralj, Janez GrumAbstract:The paper treats synergic pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Such a current-pulse waveform will be obtained if a power source is controlled by thyristors integrated in a power circuit. In this case the pulse frequency is constant and the current-pulse power can be controlled by the delay time of the thyristor ignition. The paper focuses on a theoretical derivation of a general synergic equation of pulsed MIG/MAG welding with width-controlled sine-wave current pulses that relates a mean welding current with pulsed welding parameters. On this basis, a normalised Parametric Diagram with a defined Parametric welding range can be defined and elaborated, which permits a further analysis of pulsed welding and optimisation of pulsed welding parameters.
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Optimisation of welding parameters in pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Part 1: Determination of a general synergic equation and a normalised Parametric Diagram with a defined Parametric welding range
International Journal of Materials & Product Technology, 2007Co-Authors: Danijel Langus, Viljem Kralj, Janez GrumAbstract:The paper treats synergic pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Such a current-pulse waveform will be obtained if a power source is controlled by thyristors integrated in a power circuit. In this case the pulse frequency is constant and the current-pulse power can be controlled by the delay time of the thyristor ignition. The paper focuses on a theoretical derivation of a general synergic equation of pulsed MIG/MAG welding with width-controlled sine-wave current pulses that relates a mean welding current with pulsed welding parameters. On this basis, a normalised Parametric Diagram with a defined Parametric welding range can be defined and elaborated, which permits a further analysis of pulsed welding and optimisation of pulsed welding parameters.
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Optimisation of welding parameters in pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Part 2: Determination of an optimum material transfer through the arc and a control method
International Journal of Materials & Product Technology, 2007Co-Authors: Danijel Langus, Viljem Kralj, Janez GrumAbstract:The paper treats synergic pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Such a pulse-current waveform will be obtained if a power source is controlled by thyristors integrated in a power circuit with a constant pulse frequency. A momentary pulse current power, which is a product of a momentary value of current and voltage, can be controlled by the delay time of thyristor ignition. The paper focuses on an analysis and optimisation of the material transfer through the arc using a limiting criterion determined by an isoParametric equation. By means of the results obtained in the investigation, a Parametric Diagram with the optimum welding region for a chosen droplet volume transferred through the arc can be determined. The material transfer established will satisfy the criteria set to ensure a stable droplet transfer with no spatter and production of a sound weld. It turned out that the type of synergic welding device suggested for pulsed MIG7/MAG welding was suitable for the most exacting applications.
Danijel Langus - One of the best experts on this subject based on the ideXlab platform.
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optimisation of welding parameters in pulsed mig mag welding with width controlled sine wave current pulses part 1 determination of a general synergic equation and a normalised Parametric Diagram with a defined Parametric welding range
International Journal of Materials & Product Technology, 2007Co-Authors: Danijel Langus, Viljem Kralj, Janez GrumAbstract:The paper treats synergic pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Such a current-pulse waveform will be obtained if a power source is controlled by thyristors integrated in a power circuit. In this case the pulse frequency is constant and the current-pulse power can be controlled by the delay time of the thyristor ignition. The paper focuses on a theoretical derivation of a general synergic equation of pulsed MIG/MAG welding with width-controlled sine-wave current pulses that relates a mean welding current with pulsed welding parameters. On this basis, a normalised Parametric Diagram with a defined Parametric welding range can be defined and elaborated, which permits a further analysis of pulsed welding and optimisation of pulsed welding parameters.
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Optimisation of welding parameters in pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Part 1: Determination of a general synergic equation and a normalised Parametric Diagram with a defined Parametric welding range
International Journal of Materials & Product Technology, 2007Co-Authors: Danijel Langus, Viljem Kralj, Janez GrumAbstract:The paper treats synergic pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Such a current-pulse waveform will be obtained if a power source is controlled by thyristors integrated in a power circuit. In this case the pulse frequency is constant and the current-pulse power can be controlled by the delay time of the thyristor ignition. The paper focuses on a theoretical derivation of a general synergic equation of pulsed MIG/MAG welding with width-controlled sine-wave current pulses that relates a mean welding current with pulsed welding parameters. On this basis, a normalised Parametric Diagram with a defined Parametric welding range can be defined and elaborated, which permits a further analysis of pulsed welding and optimisation of pulsed welding parameters.
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Optimisation of welding parameters in pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Part 2: Determination of an optimum material transfer through the arc and a control method
International Journal of Materials & Product Technology, 2007Co-Authors: Danijel Langus, Viljem Kralj, Janez GrumAbstract:The paper treats synergic pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Such a pulse-current waveform will be obtained if a power source is controlled by thyristors integrated in a power circuit with a constant pulse frequency. A momentary pulse current power, which is a product of a momentary value of current and voltage, can be controlled by the delay time of thyristor ignition. The paper focuses on an analysis and optimisation of the material transfer through the arc using a limiting criterion determined by an isoParametric equation. By means of the results obtained in the investigation, a Parametric Diagram with the optimum welding region for a chosen droplet volume transferred through the arc can be determined. The material transfer established will satisfy the criteria set to ensure a stable droplet transfer with no spatter and production of a sound weld. It turned out that the type of synergic welding device suggested for pulsed MIG7/MAG welding was suitable for the most exacting applications.
Viljem Kralj - One of the best experts on this subject based on the ideXlab platform.
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optimisation of welding parameters in pulsed mig mag welding with width controlled sine wave current pulses part 1 determination of a general synergic equation and a normalised Parametric Diagram with a defined Parametric welding range
International Journal of Materials & Product Technology, 2007Co-Authors: Danijel Langus, Viljem Kralj, Janez GrumAbstract:The paper treats synergic pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Such a current-pulse waveform will be obtained if a power source is controlled by thyristors integrated in a power circuit. In this case the pulse frequency is constant and the current-pulse power can be controlled by the delay time of the thyristor ignition. The paper focuses on a theoretical derivation of a general synergic equation of pulsed MIG/MAG welding with width-controlled sine-wave current pulses that relates a mean welding current with pulsed welding parameters. On this basis, a normalised Parametric Diagram with a defined Parametric welding range can be defined and elaborated, which permits a further analysis of pulsed welding and optimisation of pulsed welding parameters.
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Optimisation of welding parameters in pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Part 1: Determination of a general synergic equation and a normalised Parametric Diagram with a defined Parametric welding range
International Journal of Materials & Product Technology, 2007Co-Authors: Danijel Langus, Viljem Kralj, Janez GrumAbstract:The paper treats synergic pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Such a current-pulse waveform will be obtained if a power source is controlled by thyristors integrated in a power circuit. In this case the pulse frequency is constant and the current-pulse power can be controlled by the delay time of the thyristor ignition. The paper focuses on a theoretical derivation of a general synergic equation of pulsed MIG/MAG welding with width-controlled sine-wave current pulses that relates a mean welding current with pulsed welding parameters. On this basis, a normalised Parametric Diagram with a defined Parametric welding range can be defined and elaborated, which permits a further analysis of pulsed welding and optimisation of pulsed welding parameters.
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Optimisation of welding parameters in pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Part 2: Determination of an optimum material transfer through the arc and a control method
International Journal of Materials & Product Technology, 2007Co-Authors: Danijel Langus, Viljem Kralj, Janez GrumAbstract:The paper treats synergic pulsed MIG/MAG welding with width-controlled sine-wave current pulses. Such a pulse-current waveform will be obtained if a power source is controlled by thyristors integrated in a power circuit with a constant pulse frequency. A momentary pulse current power, which is a product of a momentary value of current and voltage, can be controlled by the delay time of thyristor ignition. The paper focuses on an analysis and optimisation of the material transfer through the arc using a limiting criterion determined by an isoParametric equation. By means of the results obtained in the investigation, a Parametric Diagram with the optimum welding region for a chosen droplet volume transferred through the arc can be determined. The material transfer established will satisfy the criteria set to ensure a stable droplet transfer with no spatter and production of a sound weld. It turned out that the type of synergic welding device suggested for pulsed MIG7/MAG welding was suitable for the most exacting applications.
A. A. Kuznetsov - One of the best experts on this subject based on the ideXlab platform.
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STRUCTURE-FREQUENCY ANALYSIS OF THE RHYTHMOGRAM OF SICK PEOPLE MEDICAL AND BIOLOGICAL MEASUREMENTS
2020Co-Authors: A. A. KuznetsovAbstract:A Parametric method of structure-frequency analysis of electrocardiographic data is proposed, enabling us to qualitatively classify the conditional functional state of the organism (FSO) of sick people and, based on its dynamics, to judge the efficiency of procedures of intensive therapy established by a doctor. We uncover and analyze the differences in the distribution of power of the spectral components of the rate on a Parametric Diagram of the functional levels of sick and healthy people. Keywords: heart-rate Diagram (HRD), functional state of the organism (FSO), control and regulation of the heart rate. In the formation of new principles, approaches, and methods of integrative medicine, by a basic postulate for esti- mation of the functional state of the organism (FSO) of a person there is a transition from a cluster model of analysis of home- ostatic parameters to the model of a system that is most reactive for stimuli of the medium of influence. At a given moment, the generally recognized reactive system of the organism is the cardiovascular system, but the only method developed to the level of the standards by the method of estimation of the FSO is the method of heart-rate variability (HRV) (1). The author assumes that there exist three reasons for spreading to sick people the logic of structure-topological anal- ysis of the heart-rate Diagram (HRD), applied within the framework of prenosological diagnostics of HRV (2-5): (1) the reg- ulated and adaptive mechanisms are the same for healthy and sick people (1); (2) the effectiveness of the combination of the FSO Scale and the Svetofor system of the physiological states (2, 3); and (3) the existence of stable and metastable states depicted on the grid of the lines of equal slope of the FSO levels (3-5). For sick people, there is also a serious reason against converting the method of structure-topological analysis to an HRD, connected with the use of a statistical approach to the rhythmograms of people of different ages, sicknesses, and sever- ity of their states, i.e., not forming a statistical ensemble. The aim of the study is the development of a method for the structure-frequency analysis for rhythmograms of sick people with the formation of a structure-frequency model of heart-rate regulation for this category of people. Experimental Part. During the period 1998-2011, more than 2000 electrocardiograms (ECG) were recorded in resus- citation departments of clinical establishments in Vladimir and its surrounding regions. These recordings were made during the second removal of the Holter monitor of a licensed complex of clinical recording of the electrocardiographic signal from an AnnA Flash 3000 (6). After certification based on a 20-min recording duration (3) and a single digital frequency of 1000 Hz, the method of analysis selected proved to be characterized by HRDs of 126 recordings of 31 inspected clients. For the initial processing, the ECG data were converted to rhythmograms or HRDs in the form of sequences of the values of the RR-intervals. By means of the incorporated procedure for heart-rate variability (HRV) of the pEScreen program (7) of the AnnA Flash 3000 complex for removed HRDs, we determined selective values of the fundamental parameters of HRV, corre- sponding to the recommendations of the standards (1) and the well-known method of prenosological diagnostics of
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Structure-Frequency Analysis of the Rhythmogram of Sick People
Measurement Techniques, 2014Co-Authors: A. A. KuznetsovAbstract:A Parametric method of structure-frequency analysis of electrocardiographic data is proposed, enabling us to qualitatively classify the conditional functional state of the organism (FSO) of sick people and, based on its dynamics, to judge the efficiency of procedures of intensive therapy established by a doctor. We uncover and analyze the differences in the distribution of power of the spectral components of the rate on a Parametric Diagram of the functional levels of sick and healthy people.
Birgit Vogel-heuser - One of the best experts on this subject based on the ideXlab platform.
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HCI (12) - SysML-based approach for automation software development --- explorative usability evaluation of the provided notation
Design User Experience and Usability. Web Mobile and Product Design, 2013Co-Authors: Daniel Schütz, Martin Obermeier, Birgit Vogel-heuserAbstract:The rising complexity of production automation systems and especially their automation software require new engineering concepts to support their development. Model-based concepts for the interdisciplinary development of production systems have been proposed in many research projects. In previous works of the authors an approach to enable interdisciplinary development of automation software, based on the Systems Modeling Language (SysML), has been developed and evaluated. One of the most important notations for the developed modeling approach is the SysML Parametric Diagram (PD). This paper briefly introduces the newly adapted modeling notation of the PD and presents the evaluation results from empirical usability experiments with human subjects.
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IECON - Supporting integrated development of closed-loop PLC control software for production systems
IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society, 2012Co-Authors: Susanne Rösch, Daniel Schütz, Gülden Bayrak, Birgit Vogel-heuserAbstract:In this paper an approach to support the development process of closed-loop control software for Programmable Logic Controllers (PLC) is shown. To enhance the development process, a fast and reliable data transfer between different tools and models used during different design phases is realized by model transformation. A core model created using the Systems Modeling Language (SysML) and a corresponding model editor based on the Unified Modeling Language (UML) in combination with a newly realized model transformation from the SysML Parametric Diagram to the Simulink block Diagram is used to integrate the information from different engineering tools and models involved during automation engineering design phases. Hence, a consistent process for the development of closed-loop control software is realized.
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Supporting integrated development of closed-loop PLC control software for production systems
IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society, 2012Co-Authors: Susanne Rösch, Daniel Schütz, Gülden Bayrak, Birgit Vogel-heuserAbstract:In this paper an approach to support the development process of closed-loop control software for Programmable Logic Controllers (PLC) is shown. To enhance the development process, a fast and reliable data transfer between different tools and models used during different design phases is realized by model transformation. A core model created using the Systems Modeling Language (SysML) and a corresponding model editor based on the Unified Modeling Language (UML) in combination with a newly realized model transformation from the SysML Parametric Diagram to the Simulink block Diagram is used to integrate the information from different engineering tools and models involved during automation engineering design phases. Hence, a consistent process for the development of closed-loop control software is realized.