The Experts below are selected from a list of 225 Experts worldwide ranked by ideXlab platform

Ahmed El Moumen - One of the best experts on this subject based on the ideXlab platform.

  • Energy dissipation of stitched and unstitched woven composite materials during dynamic compression test
    Composites Part B: Engineering, 2019
    Co-Authors: Mostapha Tarfaoui, M. Nachtane, Ahmed El Moumen
    Abstract:

    Split Hopkinson Pressure Bar is one of the main methods used to characterize the dynamic behaviour of composite materials. In this study, we performed several impact tests for unstitched (2DWC) and stitched (3DWC) woven composites in order to obtain a reliable comparison between dynamic properties of these materials. On the other hand, an energetic study was carried out during these tests to draw up the Energy balance and to quantify the Energy dissipation. The impact Energy is the kinetic Energy of the striker bar and it is the total Energy Quantity available at the beginning. At the interface bar/sample, some of this Energy is absorbed by the specimens and can cause plastic deformation or damage in a different form, which can lead to heat generation. The remaining Energy corresponds to the reflected and transmitted Energy and can be determined from the measured deformation profile. The test results shows that stitch reinforcement can increase resistance in comparison with the standard composite. Moreover, the existence of Z-fibres made the fracture more complex and caused several characteristic phenomena, so that the required fracture Energy for crack propagation was increased. Stitching does not improve the damage initiation strength but significantly prolongs the duration of the crack propagation phase.

Aparna Gupta - One of the best experts on this subject based on the ideXlab platform.

  • Extended Second Price Auctions With Elastic Supply for PEV Charging in the Smart Grid
    IEEE Transactions on Smart Grid, 2016
    Co-Authors: Saptarshi Bhattacharya, Koushik Kar, Joe H. Chow, Aparna Gupta
    Abstract:

    In this paper, we explore the question of efficient allocation of Energy, while buying the same from generation companies, to plug-in electric vehicles (PEVs) by aggregator (electricity utility or load serving entities) through auction mechanisms. Recognizing the practical limitations of the Vickrey–Clarke–Groves mechanism, which would be natural to apply in this context, we investigate two practical mechanisms that can be viewed as extensions of second price auction mechanisms and have limited message (bid) complexity. In the first mechanism, the elastic-supply multi-level second price, each PEV agent submits a number of price bids, one for each of a given set of Energy levels (Energy quantities). In the second mechanism, the elastic-supply progressive second price, the PEV agents submit a 2-D bid indicating the price as well as the desired Energy Quantity. Taking into account differences across PEV-owners in terms of their willingness-to-pay values and charging time constraints, we analyze the social optimality and incentive compatibility properties of the two auction mechanisms. We also complement our theoretical findings with numerical simulations.

  • extended second price auctions for plug in electric vehicle pev charging in smart distribution grids
    Advances in Computing and Communications, 2014
    Co-Authors: Saptarshi Bhattacharya, Joe H. Chow, Aparna Gupta
    Abstract:

    Large scale deployment of Plug-in Electric Vehicles (PEVs) in the smart grid environment necessitates the use of appropriate charging control algorithms that handle the additional PEV based load effectively. While ensuring grid stability, these PEV charging control algorithms must ensure that the available Energy is delivered to where it is needed the most. In this paper, we explore the question of efficient allocation of Energy (charging rates and schedules) to PEVs by the aggregator (electricity utility) through an auction mechanism. Recognizing the practical limitations of the Vickrey-Clark-Groves (VCG) mechanism which would be natural to apply in this context, we investigate two practical mechanisms that can be viewed as extensions of second price auction mechanisms, and have limited message (bid) complexity. In the first mechanism, the multi-level second price (MSP), each PEV agent submits a number of price bids, one for each of a given set of Energy levels (Energy quantities). In the second mechanism, the progressive second price (PSP), the PEV agents submit a two-dimensional bid indicating the price as well as the desired Energy Quantity. Taking into account differences across PEV-owners in terms of their willingness-to-pay values and charging time constraints, we analyze the social optimality and incentive compatibility properties of the two auction mechanisms.

  • ACC - Extended second price auctions for Plug-in Electric Vehicle (PEV) charging in smart distribution grids
    2014 American Control Conference, 2014
    Co-Authors: Saptarshi Bhattacharya, Koushik Kar, Joe H. Chow, Aparna Gupta
    Abstract:

    Large scale deployment of Plug-in Electric Vehicles (PEVs) in the smart grid environment necessitates the use of appropriate charging control algorithms that handle the additional PEV based load effectively. While ensuring grid stability, these PEV charging control algorithms must ensure that the available Energy is delivered to where it is needed the most. In this paper, we explore the question of efficient allocation of Energy (charging rates and schedules) to PEVs by the aggregator (electricity utility) through an auction mechanism. Recognizing the practical limitations of the Vickrey-Clark-Groves (VCG) mechanism which would be natural to apply in this context, we investigate two practical mechanisms that can be viewed as extensions of second price auction mechanisms, and have limited message (bid) complexity. In the first mechanism, the multi-level second price (MSP), each PEV agent submits a number of price bids, one for each of a given set of Energy levels (Energy quantities). In the second mechanism, the progressive second price (PSP), the PEV agents submit a two-dimensional bid indicating the price as well as the desired Energy Quantity. Taking into account differences across PEV-owners in terms of their willingness-to-pay values and charging time constraints, we analyze the social optimality and incentive compatibility properties of the two auction mechanisms.

Mostapha Tarfaoui - One of the best experts on this subject based on the ideXlab platform.

  • Energy dissipation of stitched and unstitched woven composite materials during dynamic compression test
    Composites Part B: Engineering, 2019
    Co-Authors: Mostapha Tarfaoui, M. Nachtane, Ahmed El Moumen
    Abstract:

    Split Hopkinson Pressure Bar is one of the main methods used to characterize the dynamic behaviour of composite materials. In this study, we performed several impact tests for unstitched (2DWC) and stitched (3DWC) woven composites in order to obtain a reliable comparison between dynamic properties of these materials. On the other hand, an energetic study was carried out during these tests to draw up the Energy balance and to quantify the Energy dissipation. The impact Energy is the kinetic Energy of the striker bar and it is the total Energy Quantity available at the beginning. At the interface bar/sample, some of this Energy is absorbed by the specimens and can cause plastic deformation or damage in a different form, which can lead to heat generation. The remaining Energy corresponds to the reflected and transmitted Energy and can be determined from the measured deformation profile. The test results shows that stitch reinforcement can increase resistance in comparison with the standard composite. Moreover, the existence of Z-fibres made the fracture more complex and caused several characteristic phenomena, so that the required fracture Energy for crack propagation was increased. Stitching does not improve the damage initiation strength but significantly prolongs the duration of the crack propagation phase.

Saptarshi Bhattacharya - One of the best experts on this subject based on the ideXlab platform.

  • Extended Second Price Auctions With Elastic Supply for PEV Charging in the Smart Grid
    IEEE Transactions on Smart Grid, 2016
    Co-Authors: Saptarshi Bhattacharya, Koushik Kar, Joe H. Chow, Aparna Gupta
    Abstract:

    In this paper, we explore the question of efficient allocation of Energy, while buying the same from generation companies, to plug-in electric vehicles (PEVs) by aggregator (electricity utility or load serving entities) through auction mechanisms. Recognizing the practical limitations of the Vickrey–Clarke–Groves mechanism, which would be natural to apply in this context, we investigate two practical mechanisms that can be viewed as extensions of second price auction mechanisms and have limited message (bid) complexity. In the first mechanism, the elastic-supply multi-level second price, each PEV agent submits a number of price bids, one for each of a given set of Energy levels (Energy quantities). In the second mechanism, the elastic-supply progressive second price, the PEV agents submit a 2-D bid indicating the price as well as the desired Energy Quantity. Taking into account differences across PEV-owners in terms of their willingness-to-pay values and charging time constraints, we analyze the social optimality and incentive compatibility properties of the two auction mechanisms. We also complement our theoretical findings with numerical simulations.

  • extended second price auctions for plug in electric vehicle pev charging in smart distribution grids
    Advances in Computing and Communications, 2014
    Co-Authors: Saptarshi Bhattacharya, Joe H. Chow, Aparna Gupta
    Abstract:

    Large scale deployment of Plug-in Electric Vehicles (PEVs) in the smart grid environment necessitates the use of appropriate charging control algorithms that handle the additional PEV based load effectively. While ensuring grid stability, these PEV charging control algorithms must ensure that the available Energy is delivered to where it is needed the most. In this paper, we explore the question of efficient allocation of Energy (charging rates and schedules) to PEVs by the aggregator (electricity utility) through an auction mechanism. Recognizing the practical limitations of the Vickrey-Clark-Groves (VCG) mechanism which would be natural to apply in this context, we investigate two practical mechanisms that can be viewed as extensions of second price auction mechanisms, and have limited message (bid) complexity. In the first mechanism, the multi-level second price (MSP), each PEV agent submits a number of price bids, one for each of a given set of Energy levels (Energy quantities). In the second mechanism, the progressive second price (PSP), the PEV agents submit a two-dimensional bid indicating the price as well as the desired Energy Quantity. Taking into account differences across PEV-owners in terms of their willingness-to-pay values and charging time constraints, we analyze the social optimality and incentive compatibility properties of the two auction mechanisms.

  • ACC - Extended second price auctions for Plug-in Electric Vehicle (PEV) charging in smart distribution grids
    2014 American Control Conference, 2014
    Co-Authors: Saptarshi Bhattacharya, Koushik Kar, Joe H. Chow, Aparna Gupta
    Abstract:

    Large scale deployment of Plug-in Electric Vehicles (PEVs) in the smart grid environment necessitates the use of appropriate charging control algorithms that handle the additional PEV based load effectively. While ensuring grid stability, these PEV charging control algorithms must ensure that the available Energy is delivered to where it is needed the most. In this paper, we explore the question of efficient allocation of Energy (charging rates and schedules) to PEVs by the aggregator (electricity utility) through an auction mechanism. Recognizing the practical limitations of the Vickrey-Clark-Groves (VCG) mechanism which would be natural to apply in this context, we investigate two practical mechanisms that can be viewed as extensions of second price auction mechanisms, and have limited message (bid) complexity. In the first mechanism, the multi-level second price (MSP), each PEV agent submits a number of price bids, one for each of a given set of Energy levels (Energy quantities). In the second mechanism, the progressive second price (PSP), the PEV agents submit a two-dimensional bid indicating the price as well as the desired Energy Quantity. Taking into account differences across PEV-owners in terms of their willingness-to-pay values and charging time constraints, we analyze the social optimality and incentive compatibility properties of the two auction mechanisms.

M. Nachtane - One of the best experts on this subject based on the ideXlab platform.

  • Energy dissipation of stitched and unstitched woven composite materials during dynamic compression test
    Composites Part B: Engineering, 2019
    Co-Authors: Mostapha Tarfaoui, M. Nachtane, Ahmed El Moumen
    Abstract:

    Split Hopkinson Pressure Bar is one of the main methods used to characterize the dynamic behaviour of composite materials. In this study, we performed several impact tests for unstitched (2DWC) and stitched (3DWC) woven composites in order to obtain a reliable comparison between dynamic properties of these materials. On the other hand, an energetic study was carried out during these tests to draw up the Energy balance and to quantify the Energy dissipation. The impact Energy is the kinetic Energy of the striker bar and it is the total Energy Quantity available at the beginning. At the interface bar/sample, some of this Energy is absorbed by the specimens and can cause plastic deformation or damage in a different form, which can lead to heat generation. The remaining Energy corresponds to the reflected and transmitted Energy and can be determined from the measured deformation profile. The test results shows that stitch reinforcement can increase resistance in comparison with the standard composite. Moreover, the existence of Z-fibres made the fracture more complex and caused several characteristic phenomena, so that the required fracture Energy for crack propagation was increased. Stitching does not improve the damage initiation strength but significantly prolongs the duration of the crack propagation phase.