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EU Centre of ExcellenceISO 9001

ERCIMW3C MemberFraunhofer Project Center

Systems and Control Lab

Head of department

József Bokor
József Bokor
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 211
Phone: +36 1 279 6117, +36 1 279 6159
Fax: +36 1 466 7483
E-mail: bokor.jozsefEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://www.sztaki.hu/scl/

Secretary

Gyulane (Marika) Farkas
Gyulane (Marika) Farkas
Address: 1111 Budapest, Kende u. 13-17.
Mail address: MTA SZTAKI, H-1518 Budapest, P.O.B. 63, Hungary
Room number: K 210
Phone: +36 1 279 6117
Fax: +36 1 466 7483
E-mail: farkas.gyulaneEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu

Generic information

Description

Systems and Control Laboratory (SCL) has been the leading research center in Mathematical Systems and Control Theory and related applications in Hungary for more than three decades. SCL pursues research in mathematical systems modeling, analysis and control of engineering systems represented by the classical and emerging technologies, as well as other, sometimes large-scale, dynamical systems, related to the field of natural sciences. The scope of activity includes forefront research in specific fields of mathematical systems theory, system identification, filtering and control, moreover, advanced signal and image processing techniques with special focus on application of systems' theory in safety critical systems.

Scope of activity

  • Mathematical system and control theory
  • System identification
  • Nonlinear, robust and hybrid systems
  • Advanced Vehicles and Vehicle Control
  • Intelligent vehicles and transportation systems
  • Vehicle and infrastructur ecommunication systems and technologies
  • Control of autonomous land- and air-vehicles
  • Fault detection and identification in large-scale industrial systems and technologies
  • Fault tolerant control and architectures
  • Measurement and signal processing methods

Achievements

  • The extension of the results achieved for the geometrical description of linear time invariant systems to linear time varying (LTV) and/or state dependent varying parameter model structures (LPV and quasi-LPV systems) makes up a coherent strategy for further research of robust controllers. These results were successfully applied to indefinite geometries that facilitated the understanding of the role of Möbius transformation in analysis of various types of control theoretic problems.
  • Research along the extension of rational orthogonal basis functions in signal processing towards hyperbolic wavelets opened the way to the development of novel parametric system identification methods, and also to the description of systems in indefinite metrics. This allows the construction of a new hyperbolic systems theory. The newly developed identification method lets to determine the unknown poles of the system in a revolutionary new way by extending the original frequency domain description of the system with time domain measurements.
  • The research performed for intelligent vehicle and transportation systems has been structured by the distinguishing technologies applied to road- and air-vehicles.
  • Regarding intelligent vehicle and transportation systems research, the integrated solution to combined braking and steering control solutions of cars and heavy vehicles, the advanced sensor fusion and control over network methods, the fail-safe design of on board vehicle control systems, the cooperative control and advanced drivers assistance systems (ADAS) are mentioned as the most important achievements (project TRUCKDAS).
  • The basic objective of the new cooperative vehicle and traffic control methods is to enhance safety and efficiency of transportation of goods and passangers while keeping the environmental footprint of the road transportation on a minimum level.
  • The recognition that the driver is inherent part of the control loop of every man controlled vehicles, the specific control method has been developed and tested that considers a human behaviour model in the algorithm.
  • A successful communication system demonstration that was part of the official demo program of World Congress of Intelligent Transportation Systems (ITS) in Vienna made the benefits of the use and integration of the most recent wireless communication technologies, clearly visible. The communication scenarios developed for this demonstration was realistic and fully compliant with use of the IPv6 communication protocol and other advanced mobility technologies applicable both in the vehicle and the roadside infrastructure. A deployment view of the ISO/ETSI ITS Station Reference Communications Architecture was presented. The scenario focused on the implementation of Roadside and Vehicle communication stations, with a multitude of communication links (i.e., sensor access, 3G, 802.11p, WiFi) based on native point-to-point IPv6 data transfer. The presentation of the integration of low-power road sensors in the standardized architecture concept was one of the main objective of demo highlights.
  • Research in the field of Aerospace Guidance, Navigation and Control yielded many new exciting results. In the framework of the ADDSAFE FP 7 project the detection filter developed by the institute staff was found one of the best performing algorithm for detection and identification of specific actuator faults accuring in commercial aircraft structures. The algorithms have been succesfully validated on test facilities of Airbus.
  • Research of electromechanical actuators commercialized mainly by the air industry revealed new problems and provided novel results. The development of the small, electromechanical actuator subjected to the application in the control system of autonomous air vehicles was carried out, successfully. In collaboration with UTC Aerospace new mathematical models and controller algorithms for use in commercial aircrafts were developed in the frame of the ACTUATION 2015 FP7 project.
  • The laboratory tests of a small sized, dependable avionic system controller for use in unmanned air vehicles approved usability of the hardware. Flight tests of the controller are projected for the first part of 2013. The avionic system will help deployment and integration of small sized robotized aircrafts in the National airspace based on its unique sense-and-avoid machine vision based technology in an attempt to safely separate flying objects of a variety of flight licenses, in the common airspace. The vision-based avionic system is capable to identify airplane patterns over cloudy backgrounds on a variety of cloud structures. As a consequence, the small-unmanned air vehicles (UAVs) are now capable to fly over a prescribed flight trajectory, autonomously, relying on their onboard navigation systems, solely.
  • The research supported by the Office of Naval Research of the US (ONR) subjects advanced trajectory estimation and collision avoidance methods based on real time simulation and processing of sensory data. The hardware in the loop (HIL) validation of the navigation system, including the image processing and decision making functionality of the system have been succesfully demonstrated in presence of the delegate of US Air Forces and ONR.
  • Principal end users of the results of systems and control theory are from the energy-, and the vehicle and transportation industries. There have been a number of important projects, performed both in national and international horizons, whose main objective was the industrialization and analysis of practical applicability of the developed theories. There have been research and development projects (ADDSAFE-FP7, TRUCKDAS-NFÜ), carried out in close cooperation with Airbus, Bosch and Knorr-Bremse. As a direct consequence of industrial co-operation, there appeared results in the field of the design of fault tolerant vehicle on-board control systems, and in coordinated control and supervision of platoon systems for commercial road-vehicles. The integrated control of braking and steering systems together with new algorithms for intelligent unmanned vehicle control and sensor fusion solutions got new approaches in the applied research.

Products and Services

SCL offers research and development services for its industrial partners, as well as consulting, belonging in the above scope of activity.

More information:

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Staff

Ádám Bakos
Ádám Bakos
Address: 1111 Budapest, Kende u. 13-17.
Mail address: 1111 Budapest, Kende utca 13-17.
Room number: K 223
Phone: +36 1 279 6148
E-mail: bakos.adamEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Tamás Bartha
Tamás Bartha
Address: 1111 Budapest, Kende u. 13-17.
Mail address: 1518 Budapest, Pf. 63.
Room number: K 217
Phone: +36 1 279 6227
Fax: +36 1 466 7483
E-mail: bartha.tamasEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://sites.google.com/a/sztaki.hu/bartha/
Péter Bauer
Péter Bauer
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 429
Phone: +36 1 279 6163
E-mail: bauer.peterEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu, bauer.peterEZT_TOROLJE_KI@EZT_TOROLJE_KImail.bme.hu
Csilla Bányász
Csilla Bányász
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 212, K 418
Phone: +36 1 279 6186
Fax: +36 1 466 7483
E-mail: banyaszEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://www.sztaki.hu/scl/web/members/banyasz.php
Alfréd Csikós
Alfréd Csikós
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 222
Phone: +36 1 279 7266
E-mail: csikosEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
András Edelmayer
András Edelmayer
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 213
Phone: +36 1 279 6278
E-mail: edelmayerEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://www.sztaki.hu/scl/
Zoltán Fazekas
Zoltán Fazekas
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 429
Phone: +36 1 279 6163
E-mail: fazekas.zoltanEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://www.sztaki.hu/scl/web/members/fazekas.php
László Gerencsér
László Gerencsér
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 420
Phone: +36 1 279 6138
E-mail: gerencser.laszloEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://www.sztaki.hu/people/niifUniqueId=008000943,ou=People,o=SZTAKI,o=NIIF,c=HU/
Péter Gáspár
Péter Gáspár
Address: 1111 Budapest, Kende u. 13-17.
Mail address: 1111 Budapest, Kende u. 13-17
Room number: K 215
Phone: +36 1 279 6171
Fax: +36 1 466 7503
E-mail: gaspar.peterEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://www.sztaki.hu/scl.old/web/members/gaspar.php
Katalin Hangos
Katalin Hangos
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 423
Phone: +36 1 279 6101
Fax: +36 1 466 7503
E-mail: hangos.katalinEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://daedalus.scl.sztaki.hu/PCRG/members/hangos/
László Keviczky
László Keviczky
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 110
Phone: +36 1 279 6184
E-mail: keviczkyEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://www.sztaki.hu/scl/web/members/keviczky.php
Ádám Kisari
Ádám Kisari
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 428
Phone: +36 1 279 6207
E-mail: kisari.adamEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
József II Kovács
József II Kovács
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 503
Phone: +36 1 279 6288
E-mail: jkovacsEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Sándor Molnár
Sándor Molnár
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 216
Phone: +36 1 279 6173, +36 1 466 7483
E-mail: smolEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu, molnarEZT_TOROLJE_KI@EZT_TOROLJE_KIscl.sztaki.hu
Balázs Németh
Balázs Németh
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 222
Phone: + 36 1 279 6173
E-mail: balazs.nemethEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Tamás Péni
Tamás Péni
Address: 1111 Budapest, Kende u. 13-17.
Mail address: 1111 Bp. Kende u. 13-17.
Room number: K 222
Phone: +36 1 279 6173
E-mail: peni.tamasEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu, ptEZT_TOROLJE_KI@EZT_TOROLJE_KIscl.sztaki.hu
Gergely Regula
Gergely Regula
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 223
Phone: +36 1 279 6148
E-mail: regula.gergelyEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Gábor Rödönyi
Gábor Rödönyi
Address: 1111 Budapest, Kende u. 13-17.
Mail address: 1111 Budapest, Kende u. 13-17.
Room number: K 222
Phone: +36 1 279 6173
E-mail: rodonyi.gaborEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Ernő Károly Simonyi
Ernő Károly Simonyi
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 429
Phone: +36 1 279 6163, +36 1 279 7200
E-mail: simonyi.ernoEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Alexandros Soumelidis
Alexandros Soumelidis
Address: 1111 Budapest, Kende u. 13-17.
Mail address: 1111 Budapest, Kende u. 13-17.
Room number: K 214
Phone: +36 1 279 6226
Fax: +36 1 466 7483
E-mail: alexandros.soumelidisEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://www.sztaki.hu/munkatars/008002921, http://www.sztaki.hu/people/008002921
Krisztián Szabó
Krisztián Szabó
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 429
Phone: +36 1 279 6000/7200
E-mail: szabo.krisztianEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Zoltán Szabó
Zoltán Szabó
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 216
Phone: +36 1 279 6000 / 7204
E-mail: szabo.zoltanEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Gábor Szederkényi
Gábor Szederkényi
Address: H-1111 Budapest, Kende u. 13-17.
Mail address: H-1111 Budapest, Kende u. 13-17.
Room number: K 423
Phone: +36 1 279 6101
Fax: +36 1 466 7503
E-mail: szederkenyi.gaborEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://daedalus.scl.sztaki.hu/PCRG/members/szeder/index.html
András Takács
András Takács
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 503
Phone: +36 1 279 6288
E-mail: andras.takacsEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Bálint Vanek
Bálint Vanek
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 218
Phone: +36 1 279 6000 / 7191
E-mail: vanekEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Gabriella Varga
E-mail: varga.gabriellaEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
István Varga
István Varga
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 217
Phone: +36 1 279 6227
E-mail: varga.istvanEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://www.sztaki.hu/scl/web/members/varga.php
László Virág
László Virág
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 503
Phone: +36 1 279 6288
E-mail: laszlo.viragEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Homepage: http://www.sztaki.hu/scl/

Ph.D. Students

István Gőzse
István Gőzse
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 223
Phone: +36 1 279 6000 /6148
E-mail: gozse.istvanEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Márk Lukátsi
Márk Lukátsi
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 219
Phone: +36 1 279 6000 / 7258
E-mail: lukatsi.markEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Máté Mánfay
Máté Mánfay
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 419
Phone: +36 1 279 6190
E-mail: manfayEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
István Réti
István Réti
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 219
Phone: +36 1 279 6000 / 7203
E-mail: reti.istvanEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu

Students

András Erdő
András Erdő
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 219
Phone: +36 1 279 6000 / 7203
E-mail: erdoEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Balázs Varga
Balázs Varga
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 222
Phone: +36 1 279 6000 / 7266
E-mail: bvargaEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu
Viktor Wantuch
Viktor Wantuch
Address: 1111 Budapest, Kende u. 13-17.
Mail address: viktor.wantuch@sztaki.mta.hu
Room number: K 219
Phone: +36 1 279 6000 / 7203
E-mail: wantuch.viktorEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu

On leave

Attila Gábor
Attila Gábor
Address: 1111 Budapest, Kende u. 13-17.
Room number: K 429
Phone: +36 1 279 6163
E-mail: agaborEZT_TOROLJE_KI@EZT_TOROLJE_KIsztaki.mta.hu

Important publications

2008.

Generalized piecewise linear feedback stabilizability of controlled linear switched systems
Authors: Szabó, Zoltán; Bokor, József; Balas, Gary
Date: 2008.
A new semi-active suspension control strategy through LPV technique
Authors: Poussot-Vassal, C.; Sename, O.; Dugard, L.; Gáspár, Péter; Szabó, Zoltán; Bokor, József
Date: 2008.

2007.

Prediction-based diagnosis and loss prevention using qualitative multi-scale models
Authors: Németh, Erzsébet; Lakner, R.; Hangos, Katalin; Cameron, I. T.
Date: 2007.
Modeling and simulation of the primary circuit of the Paks nuclear power plant for control and diagnosis
Authors: Németh, Erzsébet; Fazekas, Csaba; Szederkényi, Gábor; Hangos, Katalin
Editor: Zupancic, B.; Karba, R.; Blazic, S.
Date: 2007.
Dynamics of quantum mechanical systems under weak measurement
Authors: Magyar, Attila; Hangos, Katalin
Date: 2007.
State estimation and state feedback control in quasi-polinomial and quantum mechanical systems. PhD dissertations
Authors: Magyar, Attila
Date: 2007.
Trajectory tracking by TP model transformation: case study of a benchmark problem
Authors: Petres, Zoltán; Baranyi, Péter Zoltán; Korondi, Péter; Hashimoto, Hideki
Date: 2007.
Point estimation of states of finite quantum systems
Authors: Petz, D.; Hangos, Katalin; Magyar, Attila
Date: 2007.
Discussion on: combining slip and deceleration control for brake-by-wire control systems: a sliding-mode approach
Adaptive estimation schemes for 2-level quantum systems
Authors: Ruppert, László
Date: 2007.
Estimating the region of stability for a hybrid model
Authors: Rozgonyi, Sz.; Hangos, Katalin
Editor: Mikles, J.; Fikar, M.; Kvasnica, M.
Date: 2007.
Model predictive control of the hybrid primary circuit dynamics in a pressurized water nuclear power plant
Process control based on physically inherent passivity
Authors: Hangos, Katalin; Szederkényi, Gábor
Editor: Bao, J.; Lee, P. L.
Date: 2007.
Combined LPV and nonlinear control of an active suspension system
Cascade stabilization and reference tracking of a simple nonlinear limb model
Authors: Csercsik, Dávid; Szederkényi, Gábor; Hangos, Katalin
Editor: Bruzzone, L.
Date: 2007.
Using graph-theoretic methods to find flat outputs
Nonlinear lumping of cascade activation reactions
Authors: Csercsik, Dávid; Hangos, Katalin
Date: 2007.
The P3 formalism: a basics for improved diagnosis in complex systems
Authors: Cameron, I. T.; Seligmann, B.; Hangos, Katalin; Lakner, R.; Németh, Erzsébet
Date: 2007.
Multiscale modeling and time-scale analysis of a auman limb
Authors: Fazekas, Csaba; Kozmann, Gy.; Hangos, Katalin
Date: 2007.
Parameter estimation of a simple hierarchial arm model
Authors: Fazekas, Csaba; Kozmann, Gy.; Magos, T.; Hangos, Katalin
Date: 2007.
A simple dynamic model of the primary circuit in VVER plants for controller design purposes
Model identification of the primary circuit at the Paks nuclear power plant
Authors: Fazekas, Csaba; Szederkényi, Gábor; Hangos, Katalin
Editor: Bruzzole, L.
Date: 2007.
A non-invasive parameter estimation method based on a planar multi-scale arm model
Authors: Fazekas, Csaba; Kozmann, Gy.; Magos, T.; Hangos, Katalin
Date: 2007.
Comparison of some methods of quantum state estimation
Authors: Baier, T. H.; Petz, Dénes; Hangos, Katalin; Magyar, Attila
Editor: Accardi, L.; Freudenberg, W.; Schürmann, M.
Date: 2007.

2006.

Diagnosztikai feladatok megvalósítása ágens-alapú technikával
Authors: Németh, Erzsébet; Lakner, R.; Hangos, Katalin
Date: 2006.
State tomography for two qubits using reduced densities
Authors: Petz, D.; Hangos, Katalin; Szántó, A.; Szöllősi, F.
Date: 2006.
An algorithm for determining a class of invariants in quasi-polynomial systems
Authors: Pongrácz, Barna; Szederkényi, Gábor; Hangos, Katalin
Date: 2006.
Interpolation with function space representation of membership functions
Authors: Yam, Y.; Wong, ML; Baranyi, Péter Zoltán
Date: 2006.
Multiagent realization of prediction-based diagnosis and loss prevention
Authors: Lakner, Rozália; Németh, Erzsébet; Hangos, Katalin; Cameron, IT
Date: 2006.
Model tuning, discrimination, and verification
Authors: Hangos, Katalin; Lakner, Rozália
Editor: Puigjaner, L; Heyen, G
Date: 2006.
Output feedback control of two-dimensional aeroelastic system
Authors: Baranyi, Péter Zoltán
Date: 2006.
Tensor-product model-based control of two-dimensional aeroelastic system
Authors: Baranyi, Péter Zoltán
Date: 2006.
Case study of the TP model transformation in the control design of a complex dynamic model with structural nonlinearity
Authors: Baranyi, Péter Zoltán; Yam, Y.
Date: 2006.
Multiscale process modeling
Authors: Cameron, IT; Ingram, GD; Hangos, Katalin
Editor: Puigjaner, L; Heyen, G
Date: 2006.
Polytopic Decomposition of Linear Parameter-Varying Models by Tensor-Product Model Transformation
Authors: Petres, Zoltán
Date: 2006. 11. 06.

2005.

Prediction-based diagnosis and loss prevention using qualitative multi-scale models
Authors: Németh, Erzsébet; Lakner, R.; Hangos, Katalin; Cameron, IT
Editor: Puigjaner, L; Espu?a, A
Date: 2005.
Unified model simplification procedure applied to a single protection valve
Authors: Németh, H.; Palkovics, László; Hangos, Katalin
Date: 2005.
Prediction-based diagnosis and loss prevention using model-based reasoning
Authors: Németh, Erzsébet; Lakner, R.; Hangos, Katalin; Cameron, IT
Date: 2005.
Diagnostic goal driven modelling and simulation of multiscale process systems
Authors: Németh, Erzsébet; Cameron, IT; Hangos, Katalin
Date: 2005.
Numerical method-independent structural solvability analysis of Dae models
Authors: Leitold, A.; Hangos, Katalin
Date: 2005.
Modeling and optimization of runway traffic flow using coloured Petri nets
Authors: Kovács, Á.; Németh, Erzsébet; Hangos, Katalin
Date: 2005.

1992.

A tool for development of qualitative and approximate quantitative process models
Authors: Németh, T.; Varga, EI; Hangos, Katalin; Jörgensen, SB
Date: 1992.