The DASH model for Power Portfolio Optimization provides a tool which helps decision-makers coordinate production decisions with opportunities in the wholesale power market. The methodology is based on a stochastic programming model which selects portfolio positions that perform well on a variety of scenarios generated through statistical modeling and optimization. When compared with a commonly used fixed-mix policy, our experiments demonstrate that the DASH model provides significant advantages over several fixed-mix policies.
{"title":"Asset price modeling: decision aids for scheduling and hedging (DASH) in deregulated electricity markets: a stochastic programming approach to power portfolio optimization","authors":"S. Sen, Lihua Yu, T. Genc","doi":"10.1287/opre.1050.0264","DOIUrl":"https://doi.org/10.1287/opre.1050.0264","url":null,"abstract":"The DASH model for Power Portfolio Optimization provides a tool which helps decision-makers coordinate production decisions with opportunities in the wholesale power market. The methodology is based on a stochastic programming model which selects portfolio positions that perform well on a variety of scenarios generated through statistical modeling and optimization. When compared with a commonly used fixed-mix policy, our experiments demonstrate that the DASH model provides significant advantages over several fixed-mix policies.","PeriodicalId":287132,"journal":{"name":"Online World Conference on Soft Computing in Industrial Applications","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125894246","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}
Discrete event simulation has traditionally been defined by items (or entities). This modeling paradigm has served the simulation industry well, but falls far short for many industries in which the parts / pieces mindset simply does not accurately portray their particular processes. For the last ten years Simulation Dynamics has been working with industries where the item paradigm falls short as a descriptive tool. This work has led to the development of a revolutionary set of simulation tools built on the Extend simulation engine.
{"title":"Non-item based tools: non-item based discrete-event simulation tools","authors":"R. Phelps, D. J. Parsons, A. J. Siprelle","doi":"10.5555/1030453.1030479","DOIUrl":"https://doi.org/10.5555/1030453.1030479","url":null,"abstract":"Discrete event simulation has traditionally been defined by items (or entities). This modeling paradigm has served the simulation industry well, but falls far short for many industries in which the parts / pieces mindset simply does not accurately portray their particular processes. For the last ten years Simulation Dynamics has been working with industries where the item paradigm falls short as a descriptive tool. This work has led to the development of a revolutionary set of simulation tools built on the Extend simulation engine.","PeriodicalId":287132,"journal":{"name":"Online World Conference on Soft Computing in Industrial Applications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128723795","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}
This paper discusses how the military can and should move into the world of virtual systems engineering. In the past engineering designs were first done on paper, reviewed using scale models, and finalized in the full scale products. In the future all aspects of product design, manufacture, and repair will be done in virtual space. The ability to make changes "on-the-fly" and without "cutting metal" can save money and time, and will result in better designs. Online collaboration, rapid access to a broad range of tools and experts, and realization of the results into a format that can be quickly and easily understood will enable a decision maker to more fully understand the implications of a particular decision. These tools have broad application in both industrial and military decision making.
{"title":"Military keynote: military-based virtual systems engineering","authors":"K. Bryden","doi":"10.5555/1030453.1030573","DOIUrl":"https://doi.org/10.5555/1030453.1030573","url":null,"abstract":"This paper discusses how the military can and should move into the world of virtual systems engineering. In the past engineering designs were first done on paper, reviewed using scale models, and finalized in the full scale products. In the future all aspects of product design, manufacture, and repair will be done in virtual space. The ability to make changes \"on-the-fly\" and without \"cutting metal\" can save money and time, and will result in better designs. Online collaboration, rapid access to a broad range of tools and experts, and realization of the results into a format that can be quickly and easily understood will enable a decision maker to more fully understand the implications of a particular decision. These tools have broad application in both industrial and military decision making.","PeriodicalId":287132,"journal":{"name":"Online World Conference on Soft Computing in Industrial Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130348768","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}
This paper presents a sortie generation rate (SGR) model and describes how to use it as a commander's tool. The SGR model was initially developed to generate published sortie rates, but proved to be an expedient commander's tool for planning options. Previously, developing sortie rates required three models, Regional Conflict Model (RCM), Logistics Composite Model (LCOM), and Flyer. Each model required its own input data and they were located in different agencies of the Air Force. The RCM model is no longer supported, LCOM requires large amounts of input data, and Flyer uses output of LCOM as part of its input. The SGR model requires little data and it is a one step process, which runs on a laptop computer. The SGR model uses constraints and events to capture the sortie rate process from a macro level without significantly detailed input.
{"title":"Campaign analysis: the sortie generation rate model","authors":"J. W. Harris","doi":"10.5555/1030453.1030575","DOIUrl":"https://doi.org/10.5555/1030453.1030575","url":null,"abstract":"This paper presents a sortie generation rate (SGR) model and describes how to use it as a commander's tool. The SGR model was initially developed to generate published sortie rates, but proved to be an expedient commander's tool for planning options. Previously, developing sortie rates required three models, Regional Conflict Model (RCM), Logistics Composite Model (LCOM), and Flyer. Each model required its own input data and they were located in different agencies of the Air Force. The RCM model is no longer supported, LCOM requires large amounts of input data, and Flyer uses output of LCOM as part of its input. The SGR model requires little data and it is a one step process, which runs on a laptop computer. The SGR model uses constraints and events to capture the sortie rate process from a macro level without significantly detailed input.","PeriodicalId":287132,"journal":{"name":"Online World Conference on Soft Computing in Industrial Applications","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122368495","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}
ATLAS is a specification language defined to outline city sections as cell spaces. A static view of the city section to be analyzed can be defined and a modeler is able to define complex traffic models in a simple fashion. A compiler for this specification language (called TSC) was built. The language implements the ATLAS constructions as Cell-DEVS models. The rule generation for describing the traffic behavior is based on macro templates, entitling changes in the model implementation in a flexible way. The formal specification avoids a high number of errors in the developed application, and the problem solving time is highly reduced.
{"title":"Roadways, vehicle, and traffic applications: defining models of urban traffic using the TSC tool","authors":"M. L. Tártaro, C. Torres, Gabriel A. Wainer","doi":"10.5555/564124.564276","DOIUrl":"https://doi.org/10.5555/564124.564276","url":null,"abstract":"ATLAS is a specification language defined to outline city sections as cell spaces. A static view of the city section to be analyzed can be defined and a modeler is able to define complex traffic models in a simple fashion. A compiler for this specification language (called TSC) was built. The language implements the ATLAS constructions as Cell-DEVS models. The rule generation for describing the traffic behavior is based on macro templates, entitling changes in the model implementation in a flexible way. The formal specification avoids a high number of errors in the developed application, and the problem solving time is highly reduced.","PeriodicalId":287132,"journal":{"name":"Online World Conference on Soft Computing in Industrial Applications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116632571","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}
This panel session is based on the responses of simulationists representing various segments of simulation practice, to an article on the required skills of a simulation analyst. The perspectives represented are those of academia, government, industry, military, and research. First, the essence of the reference article is provided. Then, the five perspectives are presented. Finally, inferences are drawn from the five perspectives and the reference article.
{"title":"Panel: education for practice: panel session: education for simulation practice --- five perspectives","authors":"J. Banks","doi":"10.1109/WSC.2001.977487","DOIUrl":"https://doi.org/10.1109/WSC.2001.977487","url":null,"abstract":"This panel session is based on the responses of simulationists representing various segments of simulation practice, to an article on the required skills of a simulation analyst. The perspectives represented are those of academia, government, industry, military, and research. First, the essence of the reference article is provided. Then, the five perspectives are presented. Finally, inferences are drawn from the five perspectives and the reference article.","PeriodicalId":287132,"journal":{"name":"Online World Conference on Soft Computing in Industrial Applications","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131774023","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 : 2001-12-09DOI: 10.1109/WSC.2005.1574251
D. Goldsman, Seong-Hee Kim, B. Nelson
This tutorial discusses some statistical procedures for selecting the best of a number of competing systems. The term "best" may refer to that simulated system having, say, the largest expected value or the greatest likelihood of yielding a large observation. We describe various procedures for finding the best, some of which assume that the underlying observations arise from competing normal distributions, and some of which are essentially nonparametric in nature. In each case, we comment on how to apply the above procedures for use in simulations.
{"title":"Statistical selection of the best system","authors":"D. Goldsman, Seong-Hee Kim, B. Nelson","doi":"10.1109/WSC.2005.1574251","DOIUrl":"https://doi.org/10.1109/WSC.2005.1574251","url":null,"abstract":"This tutorial discusses some statistical procedures for selecting the best of a number of competing systems. The term \"best\" may refer to that simulated system having, say, the largest expected value or the greatest likelihood of yielding a large observation. We describe various procedures for finding the best, some of which assume that the underlying observations arise from competing normal distributions, and some of which are essentially nonparametric in nature. In each case, we comment on how to apply the above procedures for use in simulations.","PeriodicalId":287132,"journal":{"name":"Online World Conference on Soft Computing in Industrial Applications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125911579","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}
This paper describes some identifiable trends in the manufacturing industry regarding the increased use of simulation tools, especially by small- to medium-sized companies. These trends have resulted in the need for a new type of engineer, namely simulation engineer. This need prompted the University of Skövde to develop a B.Sc. simulation engineering study program. The contents and layout of the program, which started in Autumn 2000, are described. After receiving a firm foundation in manufacturing, logistics and mathematics in the first year, the main focus of the second year is on simulation. In the third year, which includes a substantial examination project, a specialization in manufacturing or in logistics is possible. Although simulation-related examination projects are already now carried out in other study programs, the simulation engineer will be able to cover a larger part of simulation projects and will have a broader overview of available simulation tools.
{"title":"Why we need to offer a modeling and simulation engineering curriculum","authors":"L. D. Vin, M. Jägstam","doi":"10.1109/WSC.2001.977491","DOIUrl":"https://doi.org/10.1109/WSC.2001.977491","url":null,"abstract":"This paper describes some identifiable trends in the manufacturing industry regarding the increased use of simulation tools, especially by small- to medium-sized companies. These trends have resulted in the need for a new type of engineer, namely simulation engineer. This need prompted the University of Skövde to develop a B.Sc. simulation engineering study program. The contents and layout of the program, which started in Autumn 2000, are described. After receiving a firm foundation in manufacturing, logistics and mathematics in the first year, the main focus of the second year is on simulation. In the third year, which includes a substantial examination project, a specialization in manufacturing or in logistics is possible. Although simulation-related examination projects are already now carried out in other study programs, the simulation engineer will be able to cover a larger part of simulation projects and will have a broader overview of available simulation tools.","PeriodicalId":287132,"journal":{"name":"Online World Conference on Soft Computing in Industrial Applications","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122161597","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}
Due to regulation linking budgeting to performance and other government initiatives, government agencies need to quantify the benefits of proposed business strategy. This need can be satisfied by discrete event simulation. This paper details the approach used on a recent government project to assess the impact of proposed changes to a system and to provide a business case for change. The benefits of using a prototype development approach are also discussed.
{"title":"Business process simulation: simulation in government: validating business strategy","authors":"S. Shrader","doi":"10.5555/564124.564307","DOIUrl":"https://doi.org/10.5555/564124.564307","url":null,"abstract":"Due to regulation linking budgeting to performance and other government initiatives, government agencies need to quantify the benefits of proposed business strategy. This need can be satisfied by discrete event simulation. This paper details the approach used on a recent government project to assess the impact of proposed changes to a system and to provide a business case for change. The benefits of using a prototype development approach are also discussed.","PeriodicalId":287132,"journal":{"name":"Online World Conference on Soft Computing in Industrial Applications","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133176192","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}
This paper introduces the concept of reconfigurable simulation models and describes how these models can be used to support simulation-based design. As in object-oriented programming, a reconfigurable model consists of a separate interface and multiple implementations. An AND-OR tree represents which implementations can be bound to each interface. From the resulting model space, a designer can quickly select the simulation model that is most appropriate for the current design stage. We conclude the paper with an example that illustrates the XML-based implementation of reconfigurable models.
{"title":"Architectures and languages for model building and reuse: organization and selection of reconfigurable models","authors":"A. Diaz-Calderon, C. Paredis, P. Khosla","doi":"10.5555/510378.510440","DOIUrl":"https://doi.org/10.5555/510378.510440","url":null,"abstract":"This paper introduces the concept of reconfigurable simulation models and describes how these models can be used to support simulation-based design. As in object-oriented programming, a reconfigurable model consists of a separate interface and multiple implementations. An AND-OR tree represents which implementations can be bound to each interface. From the resulting model space, a designer can quickly select the simulation model that is most appropriate for the current design stage. We conclude the paper with an example that illustrates the XML-based implementation of reconfigurable models.","PeriodicalId":287132,"journal":{"name":"Online World Conference on Soft Computing in Industrial Applications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123898964","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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