Pub Date : 2014-01-16DOI: 10.3929/ETHZ-A-010362110
C. Zechner, Federico Wadehn, H. Koeppl
Markovian population models are suitable abstractions to describe well-mixed interacting particle systems in situation where stochastic fluctuations are significant due to the involvement of low copy particles. In molecular biology, measurements on the single-cell level attest to this stochasticity and one is tempted to interpret such measurements across an isogenic cell population as different sample paths of one and the same Markov model. Over recent years evidence built up against this interpretation due to the presence of cell-to-cell variability stemming from factors other than intrinsic fluctuations. To account for this extrinsic variability, Markovian models in random environments need to be considered and a key emerging question is how to perform inference for such models. We model extrinsic variability by a random parametrization of all propensity functions. To detect which of those propensities have significant variability, we lay out a sparse learning procedure captured by a hierarchical Bayesian model whose evidence function is iteratively maximized using a variational Bayesian expectation-maximization algorithm.
{"title":"Sparse Learning of Markovian Population Models in Random Environments","authors":"C. Zechner, Federico Wadehn, H. Koeppl","doi":"10.3929/ETHZ-A-010362110","DOIUrl":"https://doi.org/10.3929/ETHZ-A-010362110","url":null,"abstract":"Markovian population models are suitable abstractions to describe well-mixed interacting particle systems in situation where stochastic fluctuations are significant due to the involvement of low copy particles. In molecular biology, measurements on the single-cell level attest to this stochasticity and one is tempted to interpret such measurements across an isogenic cell population as different sample paths of one and the same Markov model. Over recent years evidence built up against this interpretation due to the presence of cell-to-cell variability stemming from factors other than intrinsic fluctuations. To account for this extrinsic variability, Markovian models in random environments need to be considered and a key emerging question is how to perform inference for such models. We model extrinsic variability by a random parametrization of all propensity functions. To detect which of those propensities have significant variability, we lay out a sparse learning procedure captured by a hierarchical Bayesian model whose evidence function is iteratively maximized using a variational Bayesian expectation-maximization algorithm.","PeriodicalId":13260,"journal":{"name":"IFAC Proceedings Volumes","volume":"14 1","pages":"1723-1728"},"PeriodicalIF":0.0,"publicationDate":"2014-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75908321","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}
Pub Date : 2014-01-01DOI: 10.3182/20140824-6-ZA-1003.02203
P. C. Marchal, D. Gila, J. G. García, J. Ortega
Abstract The quality and obtained quantity of Virgin Olive Oil is bounded by the characteristics of the olives to be processed, and further determined by the influence of the process variables during the actual elaboration. Since the quality of the olives evolves during the harvesting season, it is relevant to consider when to harvest the olives in order to maximize the profit over the whole season. This work proposes a method to determine an optimal production plan for the whole harvesting season and presents the results obtained in its application to four different scenarios.
{"title":"Optimal Production Planning for the Virgin Olive Oil Elaboration Process","authors":"P. C. Marchal, D. Gila, J. G. García, J. Ortega","doi":"10.3182/20140824-6-ZA-1003.02203","DOIUrl":"https://doi.org/10.3182/20140824-6-ZA-1003.02203","url":null,"abstract":"Abstract The quality and obtained quantity of Virgin Olive Oil is bounded by the characteristics of the olives to be processed, and further determined by the influence of the process variables during the actual elaboration. Since the quality of the olives evolves during the harvesting season, it is relevant to consider when to harvest the olives in order to maximize the profit over the whole season. This work proposes a method to determine an optimal production plan for the whole harvesting season and presents the results obtained in its application to four different scenarios.","PeriodicalId":13260,"journal":{"name":"IFAC Proceedings Volumes","volume":"36 1","pages":"8921-8926"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73663488","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}
Pub Date : 2014-01-01DOI: 10.3182/20140824-6-ZA-1003.01906
C. Combastel, Rihab El Houda Thabet, T. Raïssi, A. Zolghadri, David Gucik
Abstract Based on a consistent interface between a data-driven and a model-driven approach within an interval framework, the paper deals with the detection of two important electrical flight control system failure cases of aircraft control surfaces, namely runaway and jamming. Robust and early detection of such abnormal positions is an important issue for early system reconfiguration and for achieving sustainability goals. The motivation behind this work is the development of an original set-membership methodology for fault detection where a data-driven characterization of random noise variability (which is not usual in a bounded error context) is combined with a model-driven approach based on interval prediction in order to improve the accuracy of the overall detection scheme. The efficiency of the proposed methodology is illustrated through simulation results using data sets recorded on a highly representative aircraft benchmark.
{"title":"Set-Membership Fault Detection under Noisy Environment in Aircraft Control Surface Servo-Loops","authors":"C. Combastel, Rihab El Houda Thabet, T. Raïssi, A. Zolghadri, David Gucik","doi":"10.3182/20140824-6-ZA-1003.01906","DOIUrl":"https://doi.org/10.3182/20140824-6-ZA-1003.01906","url":null,"abstract":"Abstract Based on a consistent interface between a data-driven and a model-driven approach within an interval framework, the paper deals with the detection of two important electrical flight control system failure cases of aircraft control surfaces, namely runaway and jamming. Robust and early detection of such abnormal positions is an important issue for early system reconfiguration and for achieving sustainability goals. The motivation behind this work is the development of an original set-membership methodology for fault detection where a data-driven characterization of random noise variability (which is not usual in a bounded error context) is combined with a model-driven approach based on interval prediction in order to improve the accuracy of the overall detection scheme. The efficiency of the proposed methodology is illustrated through simulation results using data sets recorded on a highly representative aircraft benchmark.","PeriodicalId":13260,"journal":{"name":"IFAC Proceedings Volumes","volume":"154 1","pages":"8265-8271"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73724270","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}
Pub Date : 2014-01-01DOI: 10.3182/20140824-6-ZA-1003.01241
E. Hajrizi, P. Kopacek
Abstract International development is critical if we are to stabilise previously unstable regions. The development of new, sustainable education systems in such regions is well known to be an important driver for international development generally, attracting considerable body of literature as well as numerous donor initiatives. Developing economies in the midst of fundamental restructuring of higher education may benefit from radical approaches to engineering education programme design. This paper sets out the case of the development of an Engineering Management MSc program in Kosovo. It demonstrates that it is possible to develop higher-education programmes in advanced engineering, which have potential local economic impact in an emerging economy and are designed with that goal specifically in mind. The case demonstrates how it is possible to apply theories of engineering and technology professional competence to develop higher education programmes with the potential to deliver on aggressive economic and educational objectives probably as a model for frugal countries. As an example a cooperation project between the University for Business and Technology (UBT) in Prishtina, Kosovo and Vienna University of Technology will be presented and discussed.
{"title":"Engineering Management in Kosovo","authors":"E. Hajrizi, P. Kopacek","doi":"10.3182/20140824-6-ZA-1003.01241","DOIUrl":"https://doi.org/10.3182/20140824-6-ZA-1003.01241","url":null,"abstract":"Abstract International development is critical if we are to stabilise previously unstable regions. The development of new, sustainable education systems in such regions is well known to be an important driver for international development generally, attracting considerable body of literature as well as numerous donor initiatives. Developing economies in the midst of fundamental restructuring of higher education may benefit from radical approaches to engineering education programme design. This paper sets out the case of the development of an Engineering Management MSc program in Kosovo. It demonstrates that it is possible to develop higher-education programmes in advanced engineering, which have potential local economic impact in an emerging economy and are designed with that goal specifically in mind. The case demonstrates how it is possible to apply theories of engineering and technology professional competence to develop higher education programmes with the potential to deliver on aggressive economic and educational objectives probably as a model for frugal countries. As an example a cooperation project between the University for Business and Technology (UBT) in Prishtina, Kosovo and Vienna University of Technology will be presented and discussed.","PeriodicalId":13260,"journal":{"name":"IFAC Proceedings Volumes","volume":"54 1","pages":"9875-9879"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73848114","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}
Pub Date : 2014-01-01DOI: 10.3182/20140313-3-IN-3024.00176
A. Ganguly , H. Basu
This paper reviews five types of piecewise constant orthogonal functions namely Walsh, block-pulse, sample-and-hold, triangular and hybrid functions. Approximation, integration of the functions are performed and compared with the actual result. By performing integration we get the operational matrix for each individual function set. With the help of integration operational matrices we can solve an nth order differential equation which is of importance for solving control engineering problems although a first order ordinary differential equation has been dealt with in this paper.
{"title":"Review of Five Sets of Piecewise Constant Orthogonal Functions for Function Approximation, Integration and Solution of First Order Differential Equation Using These Function Sets","authors":"A. Ganguly , H. Basu","doi":"10.3182/20140313-3-IN-3024.00176","DOIUrl":"10.3182/20140313-3-IN-3024.00176","url":null,"abstract":"<div><p>This paper reviews five types of piecewise constant orthogonal functions namely Walsh, block-pulse, sample-and-hold, triangular and hybrid functions. Approximation, integration of the functions are performed and compared with the actual result. By performing integration we get the operational matrix for each individual function set. With the help of integration operational matrices we can solve an nth order differential equation which is of importance for solving control engineering problems although a first order ordinary differential equation has been dealt with in this paper.</p></div>","PeriodicalId":13260,"journal":{"name":"IFAC Proceedings Volumes","volume":"47 1","pages":"Pages 386-393"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3182/20140313-3-IN-3024.00176","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74074055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3182/20140824-6-ZA-1003.02451
P. Szalay, G. Eigner, L. Kovács
Abstract This paper investigates the capabilities of a sophisticated robust nonlinear controller designed directly for a widely known and used high-order nonlinear type 1 diabetes (T1DM) model to lessen the dependency from patient compliance and to answer practical requirements such as avoiding hypoglycaemia. The resulting controller can perform adequately in nominal conditions, but expected to keep this performance even in extreme situations, e.g. high carbohydrate intake, rejecting hypoglycaemic episodes.
{"title":"Linear Matrix Inequality-based Robust Controller design for Type-1 Diabetes Model","authors":"P. Szalay, G. Eigner, L. Kovács","doi":"10.3182/20140824-6-ZA-1003.02451","DOIUrl":"https://doi.org/10.3182/20140824-6-ZA-1003.02451","url":null,"abstract":"Abstract This paper investigates the capabilities of a sophisticated robust nonlinear controller designed directly for a widely known and used high-order nonlinear type 1 diabetes (T1DM) model to lessen the dependency from patient compliance and to answer practical requirements such as avoiding hypoglycaemia. The resulting controller can perform adequately in nominal conditions, but expected to keep this performance even in extreme situations, e.g. high carbohydrate intake, rejecting hypoglycaemic episodes.","PeriodicalId":13260,"journal":{"name":"IFAC Proceedings Volumes","volume":"47 1","pages":"9247-9252"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75158140","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}
Pub Date : 2014-01-01DOI: 10.3182/20140824-6-ZA-1003.01709
Alexander Sievert, W. Drewelow, T. Jeinsch, O. Simanski
Abstract Heart assist devices provide mechanical circulatory support for patients with end-stage heart failure. Extracorporeal heart assist devices are applied to adult and pediatric patients in the case of uni- and biventricular assistance. Modern driving units provide more mobility what is an immense benefit to the quality of life of the patients. The treated heart assist device in this article is the EXCOR system (Berlin Heart GmbH, Germany). This device is pneumatically operated by a piston drive. Pump assistance for the native heart of the patient should be provided by an automatic control system. This could be achieved by the control of the piston movement and the enclosed air mass in the pneumatic system. The model based design of a control system for the extracorporeal assist device is described in this paper.
{"title":"Modeling And Control Of An Extracorporeal Heart Assist Device","authors":"Alexander Sievert, W. Drewelow, T. Jeinsch, O. Simanski","doi":"10.3182/20140824-6-ZA-1003.01709","DOIUrl":"https://doi.org/10.3182/20140824-6-ZA-1003.01709","url":null,"abstract":"Abstract Heart assist devices provide mechanical circulatory support for patients with end-stage heart failure. Extracorporeal heart assist devices are applied to adult and pediatric patients in the case of uni- and biventricular assistance. Modern driving units provide more mobility what is an immense benefit to the quality of life of the patients. The treated heart assist device in this article is the EXCOR system (Berlin Heart GmbH, Germany). This device is pneumatically operated by a piston drive. Pump assistance for the native heart of the patient should be provided by an automatic control system. This could be achieved by the control of the piston movement and the enclosed air mass in the pneumatic system. The model based design of a control system for the extracorporeal assist device is described in this paper.","PeriodicalId":13260,"journal":{"name":"IFAC Proceedings Volumes","volume":"17 1","pages":"6581-6586"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75232811","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}
Pub Date : 2014-01-01DOI: 10.3182/20140824-6-ZA-1003.01102
C. Kojima
Abstract Recently, dynamical systems in science and engineering problems become increasingly larger and too complex. One of the ways to solve the difficulty is to model the systems with a hierarchically networked interconnection of subsystems. In this paper, we consider a hierarchical network system which is an interconnection of dissipative subsystems and identify both subsystems and network structure, called network system, preserving the dissipativity properties. We first estimate the state sequences of subsystems via the dissipation equalities instead of the matrix input-output equation in ordinary subspace identification methods. As a main result, we show an identification method in open-loop manner for subsystems and network systems based on the least-squares method. We also propose an identification method in a closed-loop manner.
{"title":"Hierarchical Network Identification of Large-Scale Systems - An Approach Based on Dissipation Equalities","authors":"C. Kojima","doi":"10.3182/20140824-6-ZA-1003.01102","DOIUrl":"https://doi.org/10.3182/20140824-6-ZA-1003.01102","url":null,"abstract":"Abstract Recently, dynamical systems in science and engineering problems become increasingly larger and too complex. One of the ways to solve the difficulty is to model the systems with a hierarchically networked interconnection of subsystems. In this paper, we consider a hierarchical network system which is an interconnection of dissipative subsystems and identify both subsystems and network structure, called network system, preserving the dissipativity properties. We first estimate the state sequences of subsystems via the dissipation equalities instead of the matrix input-output equation in ordinary subspace identification methods. As a main result, we show an identification method in open-loop manner for subsystems and network systems based on the least-squares method. We also propose an identification method in a closed-loop manner.","PeriodicalId":13260,"journal":{"name":"IFAC Proceedings Volumes","volume":"7 1","pages":"5538-5543"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75623811","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}
Abstract This paper investigates the adaptive state-feedback stabilization of stochastic nonholonomic systems which have both uncertain parameters and time-varying coefficients. The state-scaling and backstepping techniques are exploited in the design of controllers. The adaptive state-feedback stabilizing controllers and switching control strategy are proposed so that the closed-loop system can be stabilized in probability. In the end, two simulation examples are provided to illustrate effectiveness of controllers.
{"title":"Adaptive stabilization of stochastic nonholonomic systems with uncertain parameters and time-varying coefficients","authors":"Chaoli Wang, G. Wei, Hengjun Zhang, Dongkai Zhang, Zi-Peng Wang, Hua Chen","doi":"10.3182/20140824-6-ZA-1003.01357","DOIUrl":"https://doi.org/10.3182/20140824-6-ZA-1003.01357","url":null,"abstract":"Abstract This paper investigates the adaptive state-feedback stabilization of stochastic nonholonomic systems which have both uncertain parameters and time-varying coefficients. The state-scaling and backstepping techniques are exploited in the design of controllers. The adaptive state-feedback stabilizing controllers and switching control strategy are proposed so that the closed-loop system can be stabilized in probability. In the end, two simulation examples are provided to illustrate effectiveness of controllers.","PeriodicalId":13260,"journal":{"name":"IFAC Proceedings Volumes","volume":"145 1","pages":"5734-5739"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75658044","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}
Pub Date : 2014-01-01DOI: 10.3182/20140824-6-ZA-1003.00700
Fidel Torres, César García-Díaz, N. Rakoto-Ravalontsalama
The strategy of integration known as VMI (Vendor-Managed Inventory) allows the coordination of inventory policies between producers and buyers in supply chains. Based on a new proposed model for the implementation of VMI in a chain of two links composed of a producer and a buyer, this paper studies the evolution of individual strategies of the producer and the buyer by a formalism derived from the theory of evolutionary games. The conditions that determine the stability of evolutionarily stable strategies are derived and analyzed. Work results specify analytical conditions that favor the implementation of VMI on traditional chains without VMI.
{"title":"An Evolutionary Game Theory Approach to Modeling VMI Policies","authors":"Fidel Torres, César García-Díaz, N. Rakoto-Ravalontsalama","doi":"10.3182/20140824-6-ZA-1003.00700","DOIUrl":"https://doi.org/10.3182/20140824-6-ZA-1003.00700","url":null,"abstract":"The strategy of integration known as VMI (Vendor-Managed Inventory) allows the coordination of inventory policies between producers and buyers in supply chains. Based on a new proposed model for the implementation of VMI in a chain of two links composed of a producer and a buyer, this paper studies the evolution of individual strategies of the producer and the buyer by a formalism derived from the theory of evolutionary games. The conditions that determine the stability of evolutionarily stable strategies are derived and analyzed. Work results specify analytical conditions that favor the implementation of VMI on traditional chains without VMI.","PeriodicalId":13260,"journal":{"name":"IFAC Proceedings Volumes","volume":"23 1","pages":"10737-10742"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75830269","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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