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Wehrheim, “A Case for a New IT Ecosystem: On-The-Fly Computing,” <i>Business &#38; Information Systems Engineering</i>, vol. 62, no. 6, pp. 467–481, 2020, doi: <a href=\"https://doi.org/10.1007/s12599-019-00627-x\">10.1007/s12599-019-00627-x</a>.","chicago":"Karl, Holger, Dennis Kundisch, Friedhelm Meyer auf der Heide, and Heike Wehrheim. “A Case for a New IT Ecosystem: On-The-Fly Computing.” <i>Business &#38; Information Systems Engineering</i> 62, no. 6 (2020): 467–81. <a href=\"https://doi.org/10.1007/s12599-019-00627-x\">https://doi.org/10.1007/s12599-019-00627-x</a>.","short":"H. Karl, D. Kundisch, F. Meyer auf der Heide, H. Wehrheim, Business &#38; Information Systems Engineering 62 (2020) 467–481.","mla":"Karl, Holger, et al. “A Case for a New IT Ecosystem: On-The-Fly Computing.” <i>Business &#38; Information Systems Engineering</i>, vol. 62, no. 6, Springer, 2020, pp. 467–81, doi:<a href=\"https://doi.org/10.1007/s12599-019-00627-x\">10.1007/s12599-019-00627-x</a>.","bibtex":"@article{Karl_Kundisch_Meyer auf der Heide_Wehrheim_2020, title={A Case for a New IT Ecosystem: On-The-Fly Computing}, volume={62}, DOI={<a href=\"https://doi.org/10.1007/s12599-019-00627-x\">10.1007/s12599-019-00627-x</a>}, number={6}, journal={Business &#38; Information Systems Engineering}, publisher={Springer}, author={Karl, Holger and Kundisch, Dennis and Meyer auf der Heide, Friedhelm and Wehrheim, Heike}, year={2020}, pages={467–481} }","apa":"Karl, H., Kundisch, D., Meyer auf der Heide, F., &#38; Wehrheim, H. (2020). A Case for a New IT Ecosystem: On-The-Fly Computing. <i>Business &#38; Information Systems Engineering</i>, <i>62</i>(6), 467–481. <a href=\"https://doi.org/10.1007/s12599-019-00627-x\">https://doi.org/10.1007/s12599-019-00627-x</a>"},"intvolume":"        62","page":"467-481","publication_status":"published","has_accepted_license":"1","file_date_updated":"2019-12-12T10:24:47Z","project":[{"name":"SFB 901","_id":"1"},{"_id":"2","name":"SFB 901 - Project Area A"},{"_id":"3","name":"SFB 901 - Project Area B"},{"name":"SFB 901 - Project Area C","_id":"4"},{"_id":"82","name":"SFB 901 - Project Area T"},{"_id":"5","name":"SFB 901 - Subproject A1"},{"name":"SFB 901 - Subproject A2","_id":"6"},{"name":"SFB 901 - Subproject A3","_id":"7"},{"_id":"8","name":"SFB 901 - Subproject A4"},{"name":"SFB 901 - Subproject B1","_id":"9"},{"name":"SFB 901 - Subproject B2","_id":"10"},{"_id":"11","name":"SFB 901 - Subproject B3"},{"name":"SFB 901 - Subproject B4","_id":"12"},{"_id":"13","name":"SFB 901 - Subproject C1"},{"name":"SFB 901 - Subproject C2","_id":"14"},{"_id":"15","name":"SFB 901 - Subproject C3"},{"_id":"16","name":"SFB 901 - Subproject C4"},{"_id":"17","name":"SFB 901 - Subproject C5"},{"name":"SFB 901 -Subproject T1","_id":"83"},{"_id":"84","name":"SFB 901 -Subproject T2"},{"_id":"107","name":"SFB 901 -Subproject T3"},{"name":"SFB 901 - T4: SFB 901 -Subproject T4","_id":"158"}],"_id":"13770","user_id":"477","department":[{"_id":"276"},{"_id":"75"},{"_id":"63"},{"_id":"77"}],"status":"public","type":"journal_article","title":"A Case for a New IT Ecosystem: On-The-Fly Computing","publisher":"Springer","date_created":"2019-10-10T13:41:06Z","year":"2020","issue":"6","ddc":["004"],"language":[{"iso":"eng"}],"file":[{"date_created":"2019-12-12T10:24:47Z","creator":"ups","date_updated":"2019-12-12T10:24:47Z","file_id":"15311","access_level":"closed","file_name":"Karl2019_Article_ACaseForANewITEcosystemOn-The-.pdf","file_size":454532,"content_type":"application/pdf","relation":"main_file","success":1}],"publication":"Business & Information Systems Engineering"},{"place":"Rome","year":"2018","citation":{"ieee":"M. Peuster and H. Karl, “Understand your chains and keep your deadlines: Introducing time-constrained profiling for NFV,” in <i>IEEE/IFIP 14th International Conference on Network and Service Management (CNSM)</i>, Rome.","chicago":"Peuster, Manuel, and Holger Karl. “Understand Your Chains and Keep Your Deadlines: Introducing Time-Constrained Profiling for NFV.” In <i>IEEE/IFIP 14th International Conference on Network and Service Management (CNSM)</i>. Rome: IEEE/IFIP, n.d.","ama":"Peuster M, Karl H. Understand your chains and keep your deadlines: Introducing time-constrained profiling for NFV. In: <i>IEEE/IFIP 14th International Conference on Network and Service Management (CNSM)</i>. Rome: IEEE/IFIP.","short":"M. Peuster, H. Karl, in: IEEE/IFIP 14th International Conference on Network and Service Management (CNSM), IEEE/IFIP, Rome, n.d.","bibtex":"@inproceedings{Peuster_Karl, place={Rome}, title={Understand your chains and keep your deadlines: Introducing time-constrained profiling for NFV}, booktitle={IEEE/IFIP 14th International Conference on Network and Service Management (CNSM)}, publisher={IEEE/IFIP}, author={Peuster, Manuel and Karl, Holger} }","mla":"Peuster, Manuel, and Holger Karl. “Understand Your Chains and Keep Your Deadlines: Introducing Time-Constrained Profiling for NFV.” <i>IEEE/IFIP 14th International Conference on Network and Service Management (CNSM)</i>, IEEE/IFIP.","apa":"Peuster, M., &#38; Karl, H. (n.d.). Understand your chains and keep your deadlines: Introducing time-constrained profiling for NFV. In <i>IEEE/IFIP 14th International Conference on Network and Service Management (CNSM)</i>. Rome: IEEE/IFIP."},"publication_status":"accepted","has_accepted_license":"1","title":"Understand your chains and keep your deadlines: Introducing time-constrained profiling for NFV","main_file_link":[{"url":"https://ieeexplore.ieee.org/abstract/document/8584974"}],"conference":{"name":"IEEE/IFIP 14th International Conference on Network and Service Management (CNSM)","start_date":"2018-11-05","end_date":"2018-11-09","location":"Rome"},"publisher":"IEEE/IFIP","date_updated":"2022-01-06T07:02:50Z","oa":"1","author":[{"first_name":"Manuel","full_name":"Peuster, Manuel","id":"13271","last_name":"Peuster"},{"first_name":"Holger","last_name":"Karl","id":"126","full_name":"Karl, Holger"}],"date_created":"2018-12-06T12:06:14Z","file":[{"content_type":"application/pdf","relation":"main_file","date_updated":"2018-12-06T12:05:37Z","date_created":"2018-12-06T12:05:37Z","creator":"peuster","file_size":961004,"file_id":"6017","file_name":"main_copy_for_ris.pdf","access_level":"open_access"}],"status":"public","type":"conference","publication":"IEEE/IFIP 14th International Conference on Network and Service Management (CNSM)","ddc":["000"],"file_date_updated":"2018-12-06T12:05:37Z","language":[{"iso":"eng"}],"project":[{"grant_number":"761493","name":"5G Development and validation platform for global industry-specific network services and Apps","_id":"28"},{"name":"SFB 901","_id":"1"},{"_id":"4","name":"SFB 901 - Project Area C"},{"_id":"15","name":"SFB 901 - Subproject C3"}],"_id":"6016","user_id":"13271","department":[{"_id":"75"}]},{"supervisor":[{"full_name":"Suhl, Lena","last_name":"Suhl","first_name":"Lena"}],"date_created":"2017-10-17T12:41:25Z","author":[{"first_name":"Florian","full_name":"Stapel, Florian","last_name":"Stapel"}],"publisher":"Universität Paderborn","date_updated":"2022-01-06T06:53:06Z","title":"Ontology-based representation of abstract optimization models for model formulation and system generation","has_accepted_license":"1","citation":{"apa":"Stapel, F. (2016). <i>Ontology-based representation of abstract optimization models for model formulation and system generation</i>. Universität Paderborn.","short":"F. Stapel, Ontology-Based Representation of Abstract Optimization Models for Model Formulation and System Generation, Universität Paderborn, 2016.","bibtex":"@book{Stapel_2016, title={Ontology-based representation of abstract optimization models for model formulation and system generation}, publisher={Universität Paderborn}, author={Stapel, Florian}, year={2016} }","mla":"Stapel, Florian. <i>Ontology-Based Representation of Abstract Optimization Models for Model Formulation and System Generation</i>. Universität Paderborn, 2016.","ama":"Stapel F. <i>Ontology-Based Representation of Abstract Optimization Models for Model Formulation and System Generation</i>. Universität Paderborn; 2016.","ieee":"F. Stapel, <i>Ontology-based representation of abstract optimization models for model formulation and system generation</i>. Universität Paderborn, 2016.","chicago":"Stapel, Florian. <i>Ontology-Based Representation of Abstract Optimization Models for Model Formulation and System Generation</i>. Universität Paderborn, 2016."},"year":"2016","department":[{"_id":"19"}],"user_id":"477","_id":"172","project":[{"_id":"1","name":"SFB 901"},{"name":"SFB 901 - Subprojekt C3","_id":"15"},{"_id":"4","name":"SFB 901 - Project Area C"}],"file_date_updated":"2018-03-21T12:39:19Z","ddc":["040"],"type":"dissertation","status":"public","file":[{"success":1,"relation":"main_file","content_type":"application/pdf","file_size":9301431,"file_name":"172-FStapelDissertation.pdf","file_id":"1537","access_level":"closed","date_updated":"2018-03-21T12:39:19Z","creator":"florida","date_created":"2018-03-21T12:39:19Z"}]},{"abstract":[{"lang":"eng","text":"In the last two decades, water consumption in Germany has been decreasing, which causes the water tanks and pipes in water distribution systems to work inefficiently. This paper proposes a method that supports the planning process for tanks in water distribution systems. The method uses a combination of network reduction, mathematical optimization and hydraulic simulation. The mathematical optimization model is a non-convex Mixed Integer Quadratically Constrained Program (MIQCP) that is solved by a piecewise linearization. As this may lead to many binary variables and therefore high computing times, the size of the water distribution system model is reduced before building the optimization model. After applying several network reduction techniques and using a piecewise approximation of the original model, there may be some hydraulic differences between the original network model and the reduced network model. To make sure that the solution obtained in the optimization process is feasible in the original water distribution system model, the solution is verified by a hydraulic simulation. If the solution is not feasible, the reduced model has to be modified and solved again until the hydraulic simulation verifies a solution as feasible. In this paper, each of these processes is described and the results indicate the usefulness of each of them."}],"file":[{"file_size":430920,"file_name":"263-Hallmann_-_Optimizing_water_tanks_in_water_distribution_systems.pdf","file_id":"1482","access_level":"closed","date_updated":"2018-03-21T09:35:03Z","creator":"florida","date_created":"2018-03-21T09:35:03Z","success":1,"relation":"main_file","content_type":"application/pdf"}],"status":"public","type":"journal_article","publication":"OR Spectrum","ddc":["040"],"file_date_updated":"2018-03-21T09:35:03Z","project":[{"name":"SFB 901","_id":"1"},{"name":"SFB 901 - Subprojekt C3","_id":"15"},{"_id":"4","name":"SFB 901 - Project Area C"}],"_id":"263","user_id":"477","year":"2015","citation":{"bibtex":"@article{Hallmann_Suhl_2015, title={Optimizing Water Tanks in Water Distribution Systems by combining Network Reduction, Mathematical Optimization and Hydraulic Simulation}, DOI={<a href=\"https://doi.org/10.1007/s00291-015-0403-1\">10.1007/s00291-015-0403-1</a>}, journal={OR Spectrum}, publisher={Springer}, author={Hallmann, Corinna and Suhl, Leena}, year={2015}, pages={1–19} }","mla":"Hallmann, Corinna, and Leena Suhl. “Optimizing Water Tanks in Water Distribution Systems by Combining Network Reduction, Mathematical Optimization and Hydraulic Simulation.” <i>OR Spectrum</i>, Springer, 2015, pp. 1–19, doi:<a href=\"https://doi.org/10.1007/s00291-015-0403-1\">10.1007/s00291-015-0403-1</a>.","short":"C. Hallmann, L. Suhl, OR Spectrum (2015) 1–19.","apa":"Hallmann, C., &#38; Suhl, L. (2015). Optimizing Water Tanks in Water Distribution Systems by combining Network Reduction, Mathematical Optimization and Hydraulic Simulation. <i>OR Spectrum</i>, 1–19. <a href=\"https://doi.org/10.1007/s00291-015-0403-1\">https://doi.org/10.1007/s00291-015-0403-1</a>","chicago":"Hallmann, Corinna, and Leena Suhl. “Optimizing Water Tanks in Water Distribution Systems by Combining Network Reduction, Mathematical Optimization and Hydraulic Simulation.” <i>OR Spectrum</i>, 2015, 1–19. <a href=\"https://doi.org/10.1007/s00291-015-0403-1\">https://doi.org/10.1007/s00291-015-0403-1</a>.","ieee":"C. Hallmann and L. Suhl, “Optimizing Water Tanks in Water Distribution Systems by combining Network Reduction, Mathematical Optimization and Hydraulic Simulation,” <i>OR Spectrum</i>, pp. 1–19, 2015.","ama":"Hallmann C, Suhl L. Optimizing Water Tanks in Water Distribution Systems by combining Network Reduction, Mathematical Optimization and Hydraulic Simulation. <i>OR Spectrum</i>. 2015:1-19. doi:<a href=\"https://doi.org/10.1007/s00291-015-0403-1\">10.1007/s00291-015-0403-1</a>"},"page":"1-19","has_accepted_license":"1","title":"Optimizing Water Tanks in Water Distribution Systems by combining Network Reduction, Mathematical Optimization and Hydraulic Simulation","doi":"10.1007/s00291-015-0403-1","publisher":"Springer","date_updated":"2022-01-06T06:57:19Z","date_created":"2017-10-17T12:41:43Z","author":[{"last_name":"Hallmann","full_name":"Hallmann, Corinna","first_name":"Corinna"},{"first_name":"Leena","full_name":"Suhl, Leena","last_name":"Suhl"}]},{"type":"dissertation","file":[{"creator":"florida","date_created":"2018-03-21T09:34:10Z","date_updated":"2018-03-21T09:34:10Z","file_name":"265-Dissertation_-_Corinna_Hallmann.pdf","access_level":"closed","file_id":"1480","file_size":2745774,"content_type":"application/pdf","relation":"main_file","success":1}],"status":"public","user_id":"477","department":[{"_id":"19"}],"project":[{"name":"SFB 901","_id":"1"},{"name":"SFB 901 - Subprojekt C3","_id":"15"},{"name":"SFB 901 - Project Area C","_id":"4"}],"_id":"265","file_date_updated":"2018-03-21T09:34:10Z","language":[{"iso":"ger"}],"ddc":["040"],"has_accepted_license":"1","citation":{"apa":"Hallmann, C. (2015). <i>Optimierung von Wasserbehältern in einem Wasserversorgungssystem mittels einer Kombination aus Netzreduktion, mathematischer Optimierung und hydraulischer Simulation</i>. Universität Paderborn.","mla":"Hallmann, Corinna. <i>Optimierung von Wasserbehältern in einem Wasserversorgungssystem mittels einer Kombination aus Netzreduktion, mathematischer Optimierung und hydraulischer Simulation</i>. Universität Paderborn, 2015.","bibtex":"@book{Hallmann_2015, title={Optimierung von Wasserbehältern in einem Wasserversorgungssystem mittels einer Kombination aus Netzreduktion, mathematischer Optimierung und hydraulischer Simulation}, publisher={Universität Paderborn}, author={Hallmann, Corinna}, year={2015} }","short":"C. Hallmann, Optimierung von Wasserbehältern in einem Wasserversorgungssystem mittels einer Kombination aus Netzreduktion, mathematischer Optimierung und hydraulischer Simulation, Universität Paderborn, 2015.","ama":"Hallmann C. <i>Optimierung von Wasserbehältern in einem Wasserversorgungssystem mittels einer Kombination aus Netzreduktion, mathematischer Optimierung und hydraulischer Simulation</i>. Universität Paderborn; 2015.","chicago":"Hallmann, Corinna. <i>Optimierung von Wasserbehältern in einem Wasserversorgungssystem mittels einer Kombination aus Netzreduktion, mathematischer Optimierung und hydraulischer Simulation</i>. Universität Paderborn, 2015.","ieee":"C. Hallmann, <i>Optimierung von Wasserbehältern in einem Wasserversorgungssystem mittels einer Kombination aus Netzreduktion, mathematischer Optimierung und hydraulischer Simulation</i>. Universität Paderborn, 2015."},"year":"2015","author":[{"first_name":"Corinna","last_name":"Hallmann","full_name":"Hallmann, Corinna"}],"supervisor":[{"first_name":"Lena","full_name":"Suhl, Lena","last_name":"Suhl"}],"date_created":"2017-10-17T12:41:43Z","date_updated":"2022-01-06T06:57:21Z","publisher":"Universität Paderborn","title":"Optimierung von Wasserbehältern in einem Wasserversorgungssystem mittels einer Kombination aus Netzreduktion, mathematischer Optimierung und hydraulischer Simulation"},{"type":"report","status":"public","file":[{"file_name":"389-201x_-_Stapel__Suhl_-_Ontology-based_Representation_of_Optimization_Models.pdf","access_level":"closed","file_id":"1386","file_size":595852,"creator":"florida","date_created":"2018-03-20T07:01:29Z","date_updated":"2018-03-20T07:01:29Z","relation":"main_file","success":1,"content_type":"application/pdf"}],"abstract":[{"text":"This article presents a new approach for representing and processing abstract optimization models. Confronted with model and data integration tasks for distributed Decision Support Systems which are especially composed out of software services, we describe model constituents such as constraints both structurally and semantically. Within our approach, typed model constituents can be integrated into complete models and the instantiation of model constituents itself with data and data models can be wrapped into semantic software services. Besides others, this supports the automated generation of adaptors and the search for and composition of services. The basic idea of our approach is to represent the optimization models as instance knowledge of different ontologies for both optimization and application domains. By separating the model expression structure from the goal and constraint conceptualizations predefined modeling constructs can be reused, where we do not only separate the model structure from data, but can also abstract the structure from a specific data model. We present an XML and ontology-query based approach for this separation and demonstrate the resulting flexible model integration procedure out of reusable goal and constraint types on a network flow problem.","lang":"eng"}],"user_id":"15504","_id":"389","project":[{"_id":"1","name":"SFB 901"},{"name":"SFB 901 - Subprojekt C3","_id":"15"},{"name":"SFB 901 - Project Area C","_id":"4"}],"file_date_updated":"2018-03-20T07:01:29Z","ddc":["040"],"has_accepted_license":"1","citation":{"bibtex":"@book{Stapel_Suhl_2014, title={Ontology-based Representation of Optimization Models}, publisher={Universität Paderborn}, author={Stapel, Florian and Suhl, Lena}, year={2014} }","mla":"Stapel, Florian, and Lena Suhl. <i>Ontology-Based Representation of Optimization Models</i>. Universität Paderborn, 2014.","short":"F. Stapel, L. Suhl, Ontology-Based Representation of Optimization Models, Universität Paderborn, 2014.","apa":"Stapel, F., &#38; Suhl, L. (2014). <i>Ontology-based Representation of Optimization Models</i>. Universität Paderborn.","ama":"Stapel F, Suhl L. <i>Ontology-Based Representation of Optimization Models</i>. Universität Paderborn; 2014.","ieee":"F. Stapel and L. Suhl, <i>Ontology-based Representation of Optimization Models</i>. Universität Paderborn, 2014.","chicago":"Stapel, Florian, and Lena Suhl. <i>Ontology-Based Representation of Optimization Models</i>. Universität Paderborn, 2014."},"year":"2014","date_created":"2017-10-17T12:42:07Z","author":[{"full_name":"Stapel, Florian","last_name":"Stapel","first_name":"Florian"},{"full_name":"Suhl, Lena","last_name":"Suhl","first_name":"Lena"}],"date_updated":"2022-01-06T06:59:49Z","publisher":"Universität Paderborn","title":"Ontology-based Representation of Optimization Models"},{"citation":{"apa":"Stapel, F., &#38; Suhl, L. (2014). <i>A MINLP Approach for Planning the Renewal of Pipes in Drinking Water Networks</i>. Universität Paderborn.","short":"F. Stapel, L. Suhl, A MINLP Approach for Planning the Renewal of Pipes in Drinking Water Networks, Universität Paderborn, 2014.","bibtex":"@book{Stapel_Suhl_2014, title={A MINLP Approach for Planning the Renewal of Pipes in Drinking Water Networks}, publisher={Universität Paderborn}, author={Stapel, Florian and Suhl, Leena}, year={2014} }","mla":"Stapel, Florian, and Leena Suhl. <i>A MINLP Approach for Planning the Renewal of Pipes in Drinking Water Networks</i>. Universität Paderborn, 2014.","ama":"Stapel F, Suhl L. <i>A MINLP Approach for Planning the Renewal of Pipes in Drinking Water Networks</i>. Universität Paderborn; 2014.","chicago":"Stapel, Florian, and Leena Suhl. <i>A MINLP Approach for Planning the Renewal of Pipes in Drinking Water Networks</i>. Universität Paderborn, 2014.","ieee":"F. Stapel and L. Suhl, <i>A MINLP Approach for Planning the Renewal of Pipes in Drinking Water Networks</i>. Universität Paderborn, 2014."},"year":"2014","has_accepted_license":"1","title":"A MINLP Approach for Planning the Renewal of Pipes in Drinking Water Networks","date_created":"2017-10-17T12:42:22Z","author":[{"full_name":"Stapel, Florian","last_name":"Stapel","first_name":"Florian"},{"last_name":"Suhl","full_name":"Suhl, Leena","first_name":"Leena"}],"publisher":"Universität Paderborn","date_updated":"2022-01-06T07:01:16Z","file":[{"date_updated":"2018-03-16T11:20:22Z","date_created":"2018-03-16T11:20:22Z","creator":"florida","file_size":435976,"file_id":"1335","access_level":"closed","file_name":"465-2014_-_Stapel__Suhl_-_TechReport_MINLP_Water.pdf","content_type":"application/pdf","success":1,"relation":"main_file"}],"status":"public","abstract":[{"text":"This article presents a novel Mixed Integer Nonlinear Programming (MINLP) approach for finding a renewal plan of pipes in a water distribution system. We formulate a MINLP model for finding the times of renewal and suited measurements of pipe dimensions in a multi-year planning horizon. The model includes a multi-period hydraulic simulation of the distribution systems behaviour thereby respecting the friction caused headloss as a nonlinear constraint. We apply the MINLP solver Bonmin to a test network and present first numerical results. The models embedding into a general solution framework for water network problems consisting of network reduction and simulation steps in an interated way, is beign discussed. This latter discussion corresponds well to the recent results by C. Hallmann for the problem of tank planning within the mentioned solution framework that has been presented there for the first time.","lang":"eng"}],"type":"report","file_date_updated":"2018-03-16T11:20:22Z","ddc":["040"],"user_id":"15504","project":[{"_id":"1","name":"SFB 901"},{"_id":"15","name":"SFB 901 - Subprojekt C3"},{"name":"SFB 901 - Project Area C","_id":"4"}],"_id":"465"},{"status":"public","type":"bachelorsthesis","language":[{"iso":"ger"}],"project":[{"name":"SFB 901","_id":"1"},{"_id":"15","name":"SFB 901 - Subprojekt C3"},{"_id":"4","name":"SFB 901 - Project Area C"}],"_id":"429","user_id":"477","year":"2014","citation":{"apa":"Herbort, M. (2014). <i>Entwicklung eines mathematischen Modells zur Optimierung der Struktur eines Trinkwasserbehälters</i>. Universität Paderborn.","bibtex":"@book{Herbort_2014, title={Entwicklung eines mathematischen Modells zur Optimierung der Struktur eines Trinkwasserbehälters}, publisher={Universität Paderborn}, author={Herbort, Maik}, year={2014} }","mla":"Herbort, Maik. <i>Entwicklung eines mathematischen Modells zur Optimierung der Struktur eines Trinkwasserbehälters</i>. Universität Paderborn, 2014.","short":"M. Herbort, Entwicklung eines mathematischen Modells zur Optimierung der Struktur eines Trinkwasserbehälters, Universität Paderborn, 2014.","chicago":"Herbort, Maik. <i>Entwicklung eines mathematischen Modells zur Optimierung der Struktur eines Trinkwasserbehälters</i>. Universität Paderborn, 2014.","ieee":"M. Herbort, <i>Entwicklung eines mathematischen Modells zur Optimierung der Struktur eines Trinkwasserbehälters</i>. Universität Paderborn, 2014.","ama":"Herbort M. <i>Entwicklung eines mathematischen Modells zur Optimierung der Struktur eines Trinkwasserbehälters</i>. Universität Paderborn; 2014."},"title":"Entwicklung eines mathematischen Modells zur Optimierung der Struktur eines Trinkwasserbehälters","date_updated":"2022-01-06T07:00:48Z","publisher":"Universität Paderborn","date_created":"2017-10-17T12:42:15Z","author":[{"first_name":"Maik","full_name":"Herbort, Maik","last_name":"Herbort"}]},{"title":"An Approach for a Decision Support Systems to optimize Water Tanks in Water Supply Systems by combining Network Reduction, Optimization and Simulation","publisher":"Universität Paderborn","date_updated":"2022-01-06T07:01:59Z","date_created":"2017-10-17T12:42:40Z","author":[{"full_name":"Hallmann, Corinna","last_name":"Hallmann","first_name":"Corinna"}],"year":"2013","citation":{"chicago":"Hallmann, Corinna. <i>An Approach for a Decision Support Systems to Optimize Water Tanks in Water Supply Systems by Combining Network Reduction, Optimization and Simulation</i>. Universität Paderborn, 2013.","ieee":"C. Hallmann, <i>An Approach for a Decision Support Systems to optimize Water Tanks in Water Supply Systems by combining Network Reduction, Optimization and Simulation</i>. Universität Paderborn, 2013.","ama":"Hallmann C. <i>An Approach for a Decision Support Systems to Optimize Water Tanks in Water Supply Systems by Combining Network Reduction, Optimization and Simulation</i>. Universität Paderborn; 2013.","apa":"Hallmann, C. (2013). <i>An Approach for a Decision Support Systems to optimize Water Tanks in Water Supply Systems by combining Network Reduction, Optimization and Simulation</i>. Universität Paderborn.","bibtex":"@book{Hallmann_2013, title={An Approach for a Decision Support Systems to optimize Water Tanks in Water Supply Systems by combining Network Reduction, Optimization and Simulation}, publisher={Universität Paderborn}, author={Hallmann, Corinna}, year={2013} }","mla":"Hallmann, Corinna. <i>An Approach for a Decision Support Systems to Optimize Water Tanks in Water Supply Systems by Combining Network Reduction, Optimization and Simulation</i>. Universität Paderborn, 2013.","short":"C. Hallmann, An Approach for a Decision Support Systems to Optimize Water Tanks in Water Supply Systems by Combining Network Reduction, Optimization and Simulation, Universität Paderborn, 2013."},"has_accepted_license":"1","ddc":["040"],"file_date_updated":"2018-03-15T10:27:58Z","_id":"557","project":[{"_id":"1","name":"SFB 901"},{"_id":"15","name":"SFB 901 - Subprojekt C3"},{"_id":"4","name":"SFB 901 - Project Area C"}],"user_id":"15504","abstract":[{"lang":"eng","text":"Since the last two decades, the water consumption in Germany is decreasing, which causes the water tanks and pipes in a water supply system to work inefficiently. This paper proposes an approach for a decision support system, which helps to decide how to plan new water tanks and resize existing tanks in water supply systems. The approach uses a combination of network reduction, mathematical optimization and hydraulic simulation. The mathematical optimization model is a nonconvex Mixed Integer Quadratically Constrained Program (MIQCP), which is solved by a piecewise linearization. As this may lead to many binary variables and therefore high computational times, the size of the water supply system model is reduced before building the optimization model. By applying several network reduction techniques there may occur some hydraulic differences between the original network model and the reduced network model. To make sure that the solution obtained in the optimization process is feasible in the original water supply system, the solution is verified by a hydraulic simulation tool."}],"status":"public","file":[{"date_updated":"2018-03-15T10:27:58Z","creator":"florida","date_created":"2018-03-15T10:27:58Z","file_size":271038,"access_level":"closed","file_id":"1283","file_name":"557-Hal13.pdf","content_type":"application/pdf","success":1,"relation":"main_file"}],"type":"report"},{"date_created":"2017-10-17T12:42:49Z","author":[{"last_name":"Seier","full_name":"Seier, Henrik","first_name":"Henrik"}],"publisher":"Universität Paderborn","date_updated":"2022-01-06T07:02:51Z","title":"Implementierung eines Branch-and-Bound-Algorithmus für nichtkonvexe gemischt-ganzzahlige Optimierungsprobleme mit quadratischen Nebenbedingungen","citation":{"ieee":"H. Seier, <i>Implementierung eines Branch-and-Bound-Algorithmus für nichtkonvexe gemischt-ganzzahlige Optimierungsprobleme mit quadratischen Nebenbedingungen</i>. Universität Paderborn, 2012.","chicago":"Seier, Henrik. <i>Implementierung eines Branch-and-Bound-Algorithmus für nichtkonvexe gemischt-ganzzahlige Optimierungsprobleme mit quadratischen Nebenbedingungen</i>. Universität Paderborn, 2012.","ama":"Seier H. <i>Implementierung eines Branch-and-Bound-Algorithmus für nichtkonvexe gemischt-ganzzahlige Optimierungsprobleme mit quadratischen Nebenbedingungen</i>. Universität Paderborn; 2012.","apa":"Seier, H. (2012). <i>Implementierung eines Branch-and-Bound-Algorithmus für nichtkonvexe gemischt-ganzzahlige Optimierungsprobleme mit quadratischen Nebenbedingungen</i>. Universität Paderborn.","bibtex":"@book{Seier_2012, title={Implementierung eines Branch-and-Bound-Algorithmus für nichtkonvexe gemischt-ganzzahlige Optimierungsprobleme mit quadratischen Nebenbedingungen}, publisher={Universität Paderborn}, author={Seier, Henrik}, year={2012} }","mla":"Seier, Henrik. <i>Implementierung eines Branch-and-Bound-Algorithmus für nichtkonvexe gemischt-ganzzahlige Optimierungsprobleme mit quadratischen Nebenbedingungen</i>. Universität Paderborn, 2012.","short":"H. Seier, Implementierung eines Branch-and-Bound-Algorithmus für nichtkonvexe gemischt-ganzzahlige Optimierungsprobleme mit quadratischen Nebenbedingungen, Universität Paderborn, 2012."},"year":"2012","user_id":"477","_id":"604","project":[{"_id":"1","name":"SFB 901"},{"_id":"15","name":"SFB 901 - Subprojekt C3"},{"name":"SFB 901 - Project Area C","_id":"4"}],"language":[{"iso":"ger"}],"type":"mastersthesis","status":"public"},{"citation":{"chicago":"Isenberg, Florian. <i>Implementierung eines adaptiven Verfahrens zur Linearisierung von nicht-konvexen, nichtlinearen Wassernetzmodellen mit Hilfe einer Fehlerabschätzung</i>. Universität Paderborn, 2012.","ieee":"F. Isenberg, <i>Implementierung eines adaptiven Verfahrens zur Linearisierung von nicht-konvexen, nichtlinearen Wassernetzmodellen mit Hilfe einer Fehlerabschätzung</i>. Universität Paderborn, 2012.","ama":"Isenberg F. <i>Implementierung eines adaptiven Verfahrens zur Linearisierung von nicht-konvexen, nichtlinearen Wassernetzmodellen mit Hilfe einer Fehlerabschätzung</i>. Universität Paderborn; 2012.","apa":"Isenberg, F. (2012). <i>Implementierung eines adaptiven Verfahrens zur Linearisierung von nicht-konvexen, nichtlinearen Wassernetzmodellen mit Hilfe einer Fehlerabschätzung</i>. Universität Paderborn.","bibtex":"@book{Isenberg_2012, title={Implementierung eines adaptiven Verfahrens zur Linearisierung von nicht-konvexen, nichtlinearen Wassernetzmodellen mit Hilfe einer Fehlerabschätzung}, publisher={Universität Paderborn}, author={Isenberg, Florian}, year={2012} }","mla":"Isenberg, Florian. <i>Implementierung eines adaptiven Verfahrens zur Linearisierung von nicht-konvexen, nichtlinearen Wassernetzmodellen mit Hilfe einer Fehlerabschätzung</i>. Universität Paderborn, 2012.","short":"F. Isenberg, Implementierung eines adaptiven Verfahrens zur Linearisierung von nicht-konvexen, nichtlinearen Wassernetzmodellen mit Hilfe einer Fehlerabschätzung, Universität Paderborn, 2012."},"year":"2012","date_created":"2017-10-17T12:42:50Z","author":[{"first_name":"Florian","full_name":"Isenberg, Florian","last_name":"Isenberg"}],"publisher":"Universität Paderborn","date_updated":"2022-01-06T07:02:51Z","title":"Implementierung eines adaptiven Verfahrens zur Linearisierung von nicht-konvexen, nichtlinearen Wassernetzmodellen mit Hilfe einer Fehlerabschätzung","type":"mastersthesis","status":"public","user_id":"477","project":[{"name":"SFB 901","_id":"1"},{"name":"SFB 901 - Subprojekt C3","_id":"15"},{"name":"SFB 901 - Project Area C","_id":"4"}],"_id":"605","language":[{"iso":"ger"}]},{"status":"public","type":"mastersthesis","language":[{"iso":"ger"}],"project":[{"_id":"1","name":"SFB 901"},{"_id":"15","name":"SFB 901 - Subprojekt C3"},{"name":"SFB 901 - Project Area C","_id":"4"}],"_id":"613","user_id":"477","year":"2012","citation":{"short":"S. Wohlfarth, Erweiterung von d3fact um die Domäne Wasserversorgung in Verbindung mit der Analyse und Implementierung eines hydraulischen Simulationsverfahrens, Universität Paderborn, 2012.","bibtex":"@book{Wohlfarth_2012, title={Erweiterung von d3fact um die Domäne Wasserversorgung in Verbindung mit der Analyse und Implementierung eines hydraulischen Simulationsverfahrens}, publisher={Universität Paderborn}, author={Wohlfarth, Stefan}, year={2012} }","mla":"Wohlfarth, Stefan. <i>Erweiterung von d3fact um die Domäne Wasserversorgung in Verbindung mit der Analyse und Implementierung eines hydraulischen Simulationsverfahrens</i>. Universität Paderborn, 2012.","apa":"Wohlfarth, S. (2012). <i>Erweiterung von d3fact um die Domäne Wasserversorgung in Verbindung mit der Analyse und Implementierung eines hydraulischen Simulationsverfahrens</i>. Universität Paderborn.","ama":"Wohlfarth S. <i>Erweiterung von d3fact um die Domäne Wasserversorgung in Verbindung mit der Analyse und Implementierung eines hydraulischen Simulationsverfahrens</i>. Universität Paderborn; 2012.","ieee":"S. Wohlfarth, <i>Erweiterung von d3fact um die Domäne Wasserversorgung in Verbindung mit der Analyse und Implementierung eines hydraulischen Simulationsverfahrens</i>. Universität Paderborn, 2012.","chicago":"Wohlfarth, Stefan. <i>Erweiterung von d3fact um die Domäne Wasserversorgung in Verbindung mit der Analyse und Implementierung eines hydraulischen Simulationsverfahrens</i>. Universität Paderborn, 2012."},"title":"Erweiterung von d3fact um die Domäne Wasserversorgung in Verbindung mit der Analyse und Implementierung eines hydraulischen Simulationsverfahrens","date_updated":"2022-01-06T07:02:53Z","publisher":"Universität Paderborn","author":[{"first_name":"Stefan","last_name":"Wohlfarth","full_name":"Wohlfarth, Stefan"}],"date_created":"2017-10-17T12:42:51Z"},{"type":"mastersthesis","citation":{"ieee":"D. Pischel, <i>Analyse, Konzeption und Implementierung von Aggregationsverfahren für Trinkwasserversorgungsnetze</i>. Universität Paderborn, 2012.","chicago":"Pischel, Daniel. <i>Analyse, Konzeption und Implementierung von Aggregationsverfahren für Trinkwasserversorgungsnetze</i>. Universität Paderborn, 2012.","ama":"Pischel D. <i>Analyse, Konzeption und Implementierung von Aggregationsverfahren für Trinkwasserversorgungsnetze</i>. Universität Paderborn; 2012.","apa":"Pischel, D. (2012). <i>Analyse, Konzeption und Implementierung von Aggregationsverfahren für Trinkwasserversorgungsnetze</i>. Universität Paderborn.","short":"D. Pischel, Analyse, Konzeption und Implementierung von Aggregationsverfahren für Trinkwasserversorgungsnetze, Universität Paderborn, 2012.","mla":"Pischel, Daniel. <i>Analyse, Konzeption und Implementierung von Aggregationsverfahren für Trinkwasserversorgungsnetze</i>. Universität Paderborn, 2012.","bibtex":"@book{Pischel_2012, title={Analyse, Konzeption und Implementierung von Aggregationsverfahren für Trinkwasserversorgungsnetze}, publisher={Universität Paderborn}, author={Pischel, Daniel}, year={2012} }"},"status":"public","year":"2012","user_id":"477","date_created":"2017-10-17T12:42:55Z","author":[{"first_name":"Daniel","full_name":"Pischel, Daniel","last_name":"Pischel"}],"date_updated":"2022-01-06T07:03:01Z","publisher":"Universität Paderborn","project":[{"name":"SFB 901","_id":"1"},{"name":"SFB 901 - Subprojekt C3","_id":"15"},{"name":"SFB 901 - Project Area C","_id":"4"}],"_id":"633","language":[{"iso":"ger"}],"title":"Analyse, Konzeption und Implementierung von Aggregationsverfahren für Trinkwasserversorgungsnetze"},{"year":"2012","page":"404-408","citation":{"chicago":"Dohle (married name: Hallmann) , Corinna, and Leena Suhl. “An Optimization Model for the Optimal Usage of Water Tanks in Water Supply Systems.” In <i>Proceedings of the International Conference on Applied Mathematical Optimization and Modelling (APMOD)</i>, 404–8, 2012.","ieee":"C. Dohle (married name: Hallmann)  and L. Suhl, “An Optimization Model for the optimal Usage of Water Tanks in Water Supply Systems,” in <i>Proceedings of the International Conference on Applied Mathematical Optimization and Modelling (APMOD)</i>, 2012, pp. 404–408.","ama":"Dohle (married name: Hallmann)  C, Suhl L. An Optimization Model for the optimal Usage of Water Tanks in Water Supply Systems. In: <i>Proceedings of the International Conference on Applied Mathematical Optimization and Modelling (APMOD)</i>. ; 2012:404-408.","mla":"Dohle (married name: Hallmann) , Corinna, and Leena Suhl. “An Optimization Model for the Optimal Usage of Water Tanks in Water Supply Systems.” <i>Proceedings of the International Conference on Applied Mathematical Optimization and Modelling (APMOD)</i>, 2012, pp. 404–08.","bibtex":"@inproceedings{Dohle (married name: Hallmann) _Suhl_2012, title={An Optimization Model for the optimal Usage of Water Tanks in Water Supply Systems}, booktitle={Proceedings of the International Conference on Applied Mathematical Optimization and Modelling (APMOD)}, author={Dohle (married name: Hallmann) , Corinna and Suhl, Leena}, year={2012}, pages={404–408} }","short":"C. Dohle (married name: Hallmann) , L. Suhl, in: Proceedings of the International Conference on Applied Mathematical Optimization and Modelling (APMOD), 2012, pp. 404–408.","apa":"Dohle (married name: Hallmann) , C., &#38; Suhl, L. (2012). An Optimization Model for the optimal Usage of Water Tanks in Water Supply Systems. In <i>Proceedings of the International Conference on Applied Mathematical Optimization and Modelling (APMOD)</i> (pp. 404–408)."},"has_accepted_license":"1","title":"An Optimization Model for the optimal Usage of Water Tanks in Water Supply Systems","date_updated":"2022-01-06T07:03:02Z","author":[{"last_name":"Dohle (married name: Hallmann) ","full_name":"Dohle (married name: Hallmann) , Corinna","first_name":"Corinna"},{"first_name":"Leena","full_name":"Suhl, Leena","last_name":"Suhl"}],"date_created":"2017-10-17T12:42:55Z","abstract":[{"text":"In Germany, the optimization of water supply systems has gained more and more attention due to a growing cost pressure for German municipal utilities. In this work, a model is presented which optimizes the usage of water tanks. On the one hand locations of new tanks are identified, and on the other hand the size of existing tanks is optimized, subject to satisfying the demand of clients and providing the necessary amount of fire water during all time periods. The main difficulty is the consideration of the head loss equation which is required to model the hydraulic properties of a water supply system. As this equation is non-convex and quadratic the optimization model becomes a non-convex Mixed Integer Quadratically Constrained Program (MIQCP). To solve this MIQCP different solution methods are applied.","lang":"eng"}],"status":"public","file":[{"file_size":164455,"access_level":"closed","file_name":"635-Dohle_Apmod_2012.pdf","file_id":"1233","date_updated":"2018-03-14T14:15:10Z","creator":"florida","date_created":"2018-03-14T14:15:10Z","success":1,"relation":"main_file","content_type":"application/pdf"}],"publication":"Proceedings of the International Conference on Applied Mathematical Optimization and Modelling (APMOD)","type":"conference","ddc":["040"],"file_date_updated":"2018-03-14T14:15:10Z","_id":"635","project":[{"_id":"1","name":"SFB 901"},{"_id":"15","name":"SFB 901 - Subprojekt C3"},{"name":"SFB 901 - Project Area C","_id":"4"}],"user_id":"15504"},{"status":"public","type":"bachelorsthesis","language":[{"iso":"ger"}],"user_id":"477","project":[{"name":"SFB 901","_id":"1"},{"_id":"15","name":"SFB 901 - Subprojekt C3"},{"_id":"4","name":"SFB 901 - Project Area C"}],"_id":"566","citation":{"apa":"Hilger, I. (2012). <i>Untersuchung von Modellen zur operativen Planung in Trinkwasserversorgungsnetzwerken</i>. Universität Paderborn.","bibtex":"@book{Hilger_2012, title={Untersuchung von Modellen zur operativen Planung in Trinkwasserversorgungsnetzwerken}, publisher={Universität Paderborn}, author={Hilger, Ina}, year={2012} }","short":"I. Hilger, Untersuchung von Modellen zur operativen Planung in Trinkwasserversorgungsnetzwerken, Universität Paderborn, 2012.","mla":"Hilger, Ina. <i>Untersuchung von Modellen zur operativen Planung in Trinkwasserversorgungsnetzwerken</i>. Universität Paderborn, 2012.","chicago":"Hilger, Ina. <i>Untersuchung von Modellen zur operativen Planung in Trinkwasserversorgungsnetzwerken</i>. Universität Paderborn, 2012.","ieee":"I. Hilger, <i>Untersuchung von Modellen zur operativen Planung in Trinkwasserversorgungsnetzwerken</i>. Universität Paderborn, 2012.","ama":"Hilger I. <i>Untersuchung von Modellen zur operativen Planung in Trinkwasserversorgungsnetzwerken</i>. Universität Paderborn; 2012."},"year":"2012","title":"Untersuchung von Modellen zur operativen Planung in Trinkwasserversorgungsnetzwerken","date_created":"2017-10-17T12:42:42Z","author":[{"first_name":"Ina","last_name":"Hilger","full_name":"Hilger, Ina"}],"date_updated":"2022-01-06T07:02:22Z","publisher":"Universität Paderborn"}]