The Experts below are selected from a list of 108969 Experts worldwide ranked by ideXlab platform
Haibo He - One of the best experts on this subject based on the ideXlab platform.
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power system stability control for a wind farm based on adaptive dynamic programming
IEEE Transactions on Smart Grid, 2015Co-Authors: Yufei Tang, Haibo HeAbstract:In this paper, a Goal representation heuristic dynamic programming (GrHDP) based controller is developed for the doubly-fed induction generator based wind farm to improve the system transient stability under fault conditions. The proposed controller is based on adaptive dynamic programming (ADP) techniques to approximate the optimal control policy according to the interaction between the controller and the power plant. Compared to existing ADP approaches with one action network and one critic network, our GrHDP architecture introduces an additional network, i.e., the reference network, to form an Internal Goal/reward representation. This better mapping between the system state and the control action significantly improves the control performance. The effectiveness of the proposed approach is validated via two cases. The first case investigates a revised four-machine two-area system with high wind penetration and a static synchronous compensator. The second case is a practical size power system with wind farm in Liaoning Province in China. Detailed simulation analysis and comparative studies with traditional ADP approaches are presented to demonstrate the superior performance of our method.
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a three network architecture for on line learning and optimization based on adaptive dynamic programming
Neurocomputing, 2012Co-Authors: Haibo He, Zhen Ni, Jian FuAbstract:In this paper, we propose a novel adaptive dynamic programming (ADP) architecture with three networks, an action network, a critic network, and a reference network, to develop Internal Goal-representation for online learning and optimization. Unlike the traditional ADP design normally with an action network and a critic network, our approach integrates the third network, a reference network, into the actor-critic design framework to automatically and adaptively build an Internal reinforcement signal to facilitate learning and optimization overtime to accomplish Goals. We present the detailed design architecture and its associated learning algorithm to explain how effective learning and optimization can be achieved in this new ADP architecture. Furthermore, we test the performance of our architecture both on the cart-pole balancing task and the triple-link inverted pendulum balancing task, which are the popular benchmarks in the community to demonstrate its learning and control performance over time.
Jian Fu - One of the best experts on this subject based on the ideXlab platform.
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a three network architecture for on line learning and optimization based on adaptive dynamic programming
Neurocomputing, 2012Co-Authors: Haibo He, Zhen Ni, Jian FuAbstract:In this paper, we propose a novel adaptive dynamic programming (ADP) architecture with three networks, an action network, a critic network, and a reference network, to develop Internal Goal-representation for online learning and optimization. Unlike the traditional ADP design normally with an action network and a critic network, our approach integrates the third network, a reference network, into the actor-critic design framework to automatically and adaptively build an Internal reinforcement signal to facilitate learning and optimization overtime to accomplish Goals. We present the detailed design architecture and its associated learning algorithm to explain how effective learning and optimization can be achieved in this new ADP architecture. Furthermore, we test the performance of our architecture both on the cart-pole balancing task and the triple-link inverted pendulum balancing task, which are the popular benchmarks in the community to demonstrate its learning and control performance over time.
Cederwall Emma - One of the best experts on this subject based on the ideXlab platform.
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Analys av möjligheter för miljövänlig och effektiv hantering samt reducering av restprodukter från Scanias motortillverkning
2020Co-Authors: Al-sabti Noor, Cederwall EmmaAbstract:At Scania's engine manufacturing in Södertälje, manufacturing processes are used for designing and machining engine components. In the manufacturing of these engine components, residual products are formed such as millings, wastewater and residual emulsion. Scania's Internal Goal is to reduce the amount of non-recyclable waste by 25% from 2015 to 2020. Engine manufacturing aims to handle all wastewater and residual emulsion at Scania's Internal waste management facility "by 2018". The thesis examined technical possibilities of reducing the amount of residual products from the engine manufacturing, as well as investigating the potential for improvement of residual product management. Qualitative and quantitative methods, such as interviews and data processing of waste statistics have been used in the study. A solution proposal has been developed for reducing and managing millings from the production. For reduction and management of wastewater and residual emulsion, four different solutions have been developed. The solution proposals have been analyzed based of economic profitability, waste reduction and applicability. For the reduction and managing of millings, the most qualified technique was briquetting. The study shows that the amount of millings produced at the crankshaft department can be reduced by 100% and to invest in a briquetting system is financially profitable after 2,3 years if the briquettes are recycled Internally at Scania. For wastewater and residual emulsion management, there is a potential for improvement at the engine manufacturing to reduce external handling. Effciency enhancement and development of processes and working methods for engine manufacturing is a cost-effective solution to improve the management of residual products. The investigation shows that investing in a buffer system is an effective solution for improving the management of wastewater and residual emulsion, with regard to a more leveled waste flow. The two solutions are both economically profitable and environmentally beneficial in the form of less external handling. Engine manufacturing has the opportunity to reduce the amount of wastewater by investing in staff for the maintenance and control of washing machines. The investigation also shows that the amount of wastewater could be further reduced by investing in measuring and monitoring systems for the final washers. The two solutions will generate an economic profit in the form of improved cleanliness of the engine components, reduced amount of wastewater, as well as fewer external handlings
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Analysis of opportunities for environmentally friendly and efficient handling and reduction of residual products from Scania's engine manufacturing
SLU Dept. of Energy and Technology, 2020Co-Authors: Al-sabti Noor, Cederwall EmmaAbstract:At Scania's engine manufacturing in Södertälje, manufacturing processes are used for designing and machining engine components. In the manufacturing of these engine components, residual products are formed such as millings, wastewater and residual emulsion. Scania's Internal Goal is to reduce the amount of non-recyclable waste by 25% from 2015 to 2020. Engine manufacturing aims to handle all wastewater and residual emulsion at Scania's Internal waste management facility "by 2018". The thesis examined technical possibilities of reducing the amount of residual products from the engine manufacturing, as well as investigating the potential for improvement of residual product management. Qualitative and quantitative methods, such as interviews and data processing of waste statistics have been used in the study. A solution proposal has been developed for reducing and managing millings from the production. For reduction and management of wastewater and residual emulsion, four different solutions have been developed. The solution proposals have been analyzed based of economic profitability, waste reduction and applicability. For the reduction and managing of millings, the most qualified technique was briquetting. The study shows that the amount of millings produced at the crankshaft department can be reduced by 100% and to invest in a briquetting system is financially profitable after 2,3 years if the briquettes are recycled Internally at Scania. For wastewater and residual emulsion management, there is a potential for improvement at the engine manufacturing to reduce external handling. Effciency enhancement and development of processes and working methods for engine manufacturing is a cost-effective solution to improve the management of residual products. The investigation shows that investing in a buffer system is an effective solution for improving the management of wastewater and residual emulsion, with regard to a more leveled waste flow. The two solutions are both economically profitable and environmentally beneficial in the form of less external handling. Engine manufacturing has the opportunity to reduce the amount of wastewater by investing in staff for the maintenance and control of washing machines. The investigation also shows that the amount of wastewater could be further reduced by investing in measuring and monitoring systems for the final washers. The two solutions will generate an economic profit in the form of improved cleanliness of the engine components, reduced amount of wastewater, as well as fewer external handlings
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Analysis of opportunities for environmentally friendly and efficient handlingand reduction of residual products from Scania's engine manufacturing
SLU Institutionen för energi och teknik, 2020Co-Authors: Cederwall Emma, Al-sabti NoorAbstract:På Scanias motortillverkning i Södertälje används olika tillverkningsprocesser för utformning och bearbetning av motorkomponenter. Vid tillverkning av motorkomponenter uppstår restprodukter i form av slipmull, spillvatten och restemulsion som Scania måste hantera. Scania har som internt mål att reducera mängden icke-återvunnet avfall med 25 % från 2015 till 2020. Motortillverkningen har som enskilt mål att allt spillvatten och restemulsion ska hanteras på Scanias interna avfallsanläggning by 218. Examensarbetet har undersökt de tekniska möjligheterna att reducera mängden restprodukter från motortillverkningen samt undersökt förbättringspotentialen för hantering av restprodukter. Utgångspunkten i arbetet har varit kvalitativa och kvantitativa metoder i form av intervjuer och sammanställning av avfallsstatistik. För reducering och hantering av slipmull har det bearbetats fram ett lösningsförslag. Vad gäller hantering samt reducering av spillvatten och restemulsion har det tagits fram fyra olika lösningsförslag. Lösningsförslagen har analyserats utifrån aspekter såsom: ekonomisk lönsamhet, avfallsreducering och applicerbarhet. För reducering och hantering av slipmull ansågs den mest kvalificerade tekniken vara brikettering av slipmull. Undersökningen visar att mängden slipmull som bildas på vevaxelavdelningen kan reduceras med 100 % och att investera i ett briketteringssystem är ekonomiskt lönsamt efter 2,3 år om slipmullsbriktetterna återvinns internt på Scania. Vad gäller hantering av spillvatten och restemulsion visar studien på att det finns förbättringspotential på motortillverkningen för att minska externa hanteringar. Effektivisering samt utveckling av processer och arbetssätt på motortillverkningen, är en kostnadseffektiv lösning för att förbättra hanteringen. Undersökningen visar även att investering i en buffertanläggnig har en effektiv lösning för att förbättra hanteringen av spillvatten och restemulsion, med avseende på ett mer utjämnat avfallsflöde. De två lösningförslagen för hanteringen är både ekonomiskt lönsamt och miljömässigt lönsamt i form av färre externa hanteringar. Motortillverkningen har möjlighet att reducera mängden spillvatten genom att investera i personal för skötsel och kontroll av tvättmaskiner. Undersökningen visar även att mängden spillvatten skulle kunna reduceras ytterligare vid investering i mät- och övervakningssystem för sluttvättarna. De två lösningsförslagen kommer generera en ekonomisk vinst i form av förbättrad renhet på motorkomponenterna, reducerad mängd spillvatten, samt färre externa hanteringar.At Scania's engine manufacturing in Södertälje, manufacturing processes are used for designing and machining engine components. In the manufacturing of these engine components, residual products are formed such as millings, wastewater, and residual emulsion. Scania's Internal Goal is to reduce the amount of non-recyclable waste by 25% from 2015 to 2020. Engine manufacturing aims to handle all wastewater and residual emulsion at Scania's Internal waste management facility “by 2018”. The thesis examined technical possibilities of reducing the amount of residual products from the engine manufacturing, as well as investigating the potential for improvement of residual product management. Qualitative and quantitative methods, such as interviews and data processing of waste statistics have been used in the study. A solution proposal has been developed for reducing and managing millings from the production. For reduction and management of wastewater and residual emulsion, four different solutions have been developed. The solution proposals have been analyzed based of economic profitability, waste reduction and applicability. For the reduction and managing of millings, the most qualified technique was briquetting. The study shows that the amount of millings produced at the crankshaft department can be reduced by 100% and to invest in a briquetting system is financially profitable after 2,3 years if the briquettes are recycled Internally at Scania. For wastewater and residual emulsion management, there is a potential for improvement at the engine manufacturing to reduce external handling. Efficiency enhancement and development of processes and working methods for engine manufacturing is a cost-effective solution to improve the management of residual products. The investigation shows that investing in a buffer system is an effective solution for improving the management of wastewater and residual emulsion, with regard to a more leveled waste ow. The two solutions are both economically profitable and environmentally beneficial in the form of less external handling. Engine manufacturing has the opportunity to reduce the amount of wastewater by investing in staff for the maintenance and control of washing machines. The investigation also shows that the amount of wastewater could be further reduced by investing in measuring and monitoring systems for the final washers. The two solutions will generate an economic profit in the form of improved cleanliness of the engine components, reduced amount of wastewater, as well as fewer external handlings
Al-sabti Noor - One of the best experts on this subject based on the ideXlab platform.
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Analys av möjligheter för miljövänlig och effektiv hantering samt reducering av restprodukter från Scanias motortillverkning
2020Co-Authors: Al-sabti Noor, Cederwall EmmaAbstract:At Scania's engine manufacturing in Södertälje, manufacturing processes are used for designing and machining engine components. In the manufacturing of these engine components, residual products are formed such as millings, wastewater and residual emulsion. Scania's Internal Goal is to reduce the amount of non-recyclable waste by 25% from 2015 to 2020. Engine manufacturing aims to handle all wastewater and residual emulsion at Scania's Internal waste management facility "by 2018". The thesis examined technical possibilities of reducing the amount of residual products from the engine manufacturing, as well as investigating the potential for improvement of residual product management. Qualitative and quantitative methods, such as interviews and data processing of waste statistics have been used in the study. A solution proposal has been developed for reducing and managing millings from the production. For reduction and management of wastewater and residual emulsion, four different solutions have been developed. The solution proposals have been analyzed based of economic profitability, waste reduction and applicability. For the reduction and managing of millings, the most qualified technique was briquetting. The study shows that the amount of millings produced at the crankshaft department can be reduced by 100% and to invest in a briquetting system is financially profitable after 2,3 years if the briquettes are recycled Internally at Scania. For wastewater and residual emulsion management, there is a potential for improvement at the engine manufacturing to reduce external handling. Effciency enhancement and development of processes and working methods for engine manufacturing is a cost-effective solution to improve the management of residual products. The investigation shows that investing in a buffer system is an effective solution for improving the management of wastewater and residual emulsion, with regard to a more leveled waste flow. The two solutions are both economically profitable and environmentally beneficial in the form of less external handling. Engine manufacturing has the opportunity to reduce the amount of wastewater by investing in staff for the maintenance and control of washing machines. The investigation also shows that the amount of wastewater could be further reduced by investing in measuring and monitoring systems for the final washers. The two solutions will generate an economic profit in the form of improved cleanliness of the engine components, reduced amount of wastewater, as well as fewer external handlings
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Analysis of opportunities for environmentally friendly and efficient handling and reduction of residual products from Scania's engine manufacturing
SLU Dept. of Energy and Technology, 2020Co-Authors: Al-sabti Noor, Cederwall EmmaAbstract:At Scania's engine manufacturing in Södertälje, manufacturing processes are used for designing and machining engine components. In the manufacturing of these engine components, residual products are formed such as millings, wastewater and residual emulsion. Scania's Internal Goal is to reduce the amount of non-recyclable waste by 25% from 2015 to 2020. Engine manufacturing aims to handle all wastewater and residual emulsion at Scania's Internal waste management facility "by 2018". The thesis examined technical possibilities of reducing the amount of residual products from the engine manufacturing, as well as investigating the potential for improvement of residual product management. Qualitative and quantitative methods, such as interviews and data processing of waste statistics have been used in the study. A solution proposal has been developed for reducing and managing millings from the production. For reduction and management of wastewater and residual emulsion, four different solutions have been developed. The solution proposals have been analyzed based of economic profitability, waste reduction and applicability. For the reduction and managing of millings, the most qualified technique was briquetting. The study shows that the amount of millings produced at the crankshaft department can be reduced by 100% and to invest in a briquetting system is financially profitable after 2,3 years if the briquettes are recycled Internally at Scania. For wastewater and residual emulsion management, there is a potential for improvement at the engine manufacturing to reduce external handling. Effciency enhancement and development of processes and working methods for engine manufacturing is a cost-effective solution to improve the management of residual products. The investigation shows that investing in a buffer system is an effective solution for improving the management of wastewater and residual emulsion, with regard to a more leveled waste flow. The two solutions are both economically profitable and environmentally beneficial in the form of less external handling. Engine manufacturing has the opportunity to reduce the amount of wastewater by investing in staff for the maintenance and control of washing machines. The investigation also shows that the amount of wastewater could be further reduced by investing in measuring and monitoring systems for the final washers. The two solutions will generate an economic profit in the form of improved cleanliness of the engine components, reduced amount of wastewater, as well as fewer external handlings
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Analysis of opportunities for environmentally friendly and efficient handlingand reduction of residual products from Scania's engine manufacturing
SLU Institutionen för energi och teknik, 2020Co-Authors: Cederwall Emma, Al-sabti NoorAbstract:På Scanias motortillverkning i Södertälje används olika tillverkningsprocesser för utformning och bearbetning av motorkomponenter. Vid tillverkning av motorkomponenter uppstår restprodukter i form av slipmull, spillvatten och restemulsion som Scania måste hantera. Scania har som internt mål att reducera mängden icke-återvunnet avfall med 25 % från 2015 till 2020. Motortillverkningen har som enskilt mål att allt spillvatten och restemulsion ska hanteras på Scanias interna avfallsanläggning by 218. Examensarbetet har undersökt de tekniska möjligheterna att reducera mängden restprodukter från motortillverkningen samt undersökt förbättringspotentialen för hantering av restprodukter. Utgångspunkten i arbetet har varit kvalitativa och kvantitativa metoder i form av intervjuer och sammanställning av avfallsstatistik. För reducering och hantering av slipmull har det bearbetats fram ett lösningsförslag. Vad gäller hantering samt reducering av spillvatten och restemulsion har det tagits fram fyra olika lösningsförslag. Lösningsförslagen har analyserats utifrån aspekter såsom: ekonomisk lönsamhet, avfallsreducering och applicerbarhet. För reducering och hantering av slipmull ansågs den mest kvalificerade tekniken vara brikettering av slipmull. Undersökningen visar att mängden slipmull som bildas på vevaxelavdelningen kan reduceras med 100 % och att investera i ett briketteringssystem är ekonomiskt lönsamt efter 2,3 år om slipmullsbriktetterna återvinns internt på Scania. Vad gäller hantering av spillvatten och restemulsion visar studien på att det finns förbättringspotential på motortillverkningen för att minska externa hanteringar. Effektivisering samt utveckling av processer och arbetssätt på motortillverkningen, är en kostnadseffektiv lösning för att förbättra hanteringen. Undersökningen visar även att investering i en buffertanläggnig har en effektiv lösning för att förbättra hanteringen av spillvatten och restemulsion, med avseende på ett mer utjämnat avfallsflöde. De två lösningförslagen för hanteringen är både ekonomiskt lönsamt och miljömässigt lönsamt i form av färre externa hanteringar. Motortillverkningen har möjlighet att reducera mängden spillvatten genom att investera i personal för skötsel och kontroll av tvättmaskiner. Undersökningen visar även att mängden spillvatten skulle kunna reduceras ytterligare vid investering i mät- och övervakningssystem för sluttvättarna. De två lösningsförslagen kommer generera en ekonomisk vinst i form av förbättrad renhet på motorkomponenterna, reducerad mängd spillvatten, samt färre externa hanteringar.At Scania's engine manufacturing in Södertälje, manufacturing processes are used for designing and machining engine components. In the manufacturing of these engine components, residual products are formed such as millings, wastewater, and residual emulsion. Scania's Internal Goal is to reduce the amount of non-recyclable waste by 25% from 2015 to 2020. Engine manufacturing aims to handle all wastewater and residual emulsion at Scania's Internal waste management facility “by 2018”. The thesis examined technical possibilities of reducing the amount of residual products from the engine manufacturing, as well as investigating the potential for improvement of residual product management. Qualitative and quantitative methods, such as interviews and data processing of waste statistics have been used in the study. A solution proposal has been developed for reducing and managing millings from the production. For reduction and management of wastewater and residual emulsion, four different solutions have been developed. The solution proposals have been analyzed based of economic profitability, waste reduction and applicability. For the reduction and managing of millings, the most qualified technique was briquetting. The study shows that the amount of millings produced at the crankshaft department can be reduced by 100% and to invest in a briquetting system is financially profitable after 2,3 years if the briquettes are recycled Internally at Scania. For wastewater and residual emulsion management, there is a potential for improvement at the engine manufacturing to reduce external handling. Efficiency enhancement and development of processes and working methods for engine manufacturing is a cost-effective solution to improve the management of residual products. The investigation shows that investing in a buffer system is an effective solution for improving the management of wastewater and residual emulsion, with regard to a more leveled waste ow. The two solutions are both economically profitable and environmentally beneficial in the form of less external handling. Engine manufacturing has the opportunity to reduce the amount of wastewater by investing in staff for the maintenance and control of washing machines. The investigation also shows that the amount of wastewater could be further reduced by investing in measuring and monitoring systems for the final washers. The two solutions will generate an economic profit in the form of improved cleanliness of the engine components, reduced amount of wastewater, as well as fewer external handlings
Cecilia U D Stenfors - One of the best experts on this subject based on the ideXlab platform.
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superior cognitive Goal maintenance in carriers of genetic markers linked to reduced striatal d2 receptor density c957t and drd2 ankk1 taqia
PLOS ONE, 2018Co-Authors: Jonas Persson, Cecilia U D StenforsAbstract:Maintaining Goal representations is a critical component of cognitive control and is required for successful performance in many daily activities. This is particularly important when Goal-relevant information needs to be maintained in working memory (WM), updated in response to changing task demands or Internal Goal states, and protected from interference by inhibiting counter-Goal behaviors. Modulation of fronto-striatal dopamine is critical for updating and maintaining Goals and representations. Here we test the hypothesis that a genetic predisposition (C957T T+ and DRD2/ANKK1-TaqIA A+) for reduced striatal D2 receptor availability would facilitate Goal maintenance using the AX-continuous performance task (AX-CPT), on a sample of 196 adults (25–67 y). We demonstrate that carriers of two polymorphisms that have been linked to reduced striatal D2 receptor density show increased performance on context-dependent (BX) trials, and that the effect of these polymorphisms was only significant for long ISI trials where the demand for Goal maintenance is high. The current results add further knowledge to the role of D2 receptor functioning in cognitive stability and flexibility, and could have implications for understanding cognitive deficits in patients characterized by altered dopamine functioning.