The Experts below are selected from a list of 38721 Experts worldwide ranked by ideXlab platform
T. Gültop - One of the best experts on this subject based on the ideXlab platform.
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Weak shock waves and shear bands in thermoelastic solids
Acta Mechanica, 2008Co-Authors: Bahadır Alyavuz, T. GültopAbstract:The linear weak shock wave (acoustic wave) Propagation and the existence of shear bands are examined in finitely deformed thermoelastic solids within the framework of the theory of singular surfaces. The jumps of certain field variables across the shock wave front are obtained by using Taylor series expansions of them. The Propagation Condition of shock waves in a thermoelastic solid is obtained by using the strain–energy function corresponding to Duhamel–Neumann expression. The Propagation speeds of weak shock waves are determined for a particular state of deformation, that is, general dilation. The formation of shear bands and the magnitudes of critical stretches are obtained for the deformation states of uniaxial, biaxial extension and for uniform dilation.
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Weak shock waves in constrained thermoelastic solids
Archive of Applied Mechanics, 2002Co-Authors: T. GültopAbstract:The jumps in Helmholtz free energy and stress across a shock wave front are obtained by using the Taylor's series expansion of the corresponding functions of arbitrarily constrained thermoelastic solids. The linear terms in the expressions of jumps are considered alone to account for linear weak shock waves. The generalized thermomechanical constraint functions and purely mechanical constraint functions are treated separately. In the case of the thermoelastic solids with purely mechanical constraints, the Propagation Condition of weak shock waves is found to be similar to the Propagation Condition of homothermal acceleration waves. In the case of the thermoelastic solids with general thermomechanical constraints, the corresponding Propagation Condition is found to be similar to the Propagation Condition of homentropic acceleration waves. The speed of Propagation of weak shock waves is obtained in a linear thermoelastic solid subject to the purely mechanical constraint of inextensibility.
Ernesto Ruppert - One of the best experts on this subject based on the ideXlab platform.
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A SRM Applied in Wind Generation at Smart Grids Employing Wireless Power Control
IEEE Latin America Transactions, 2015Co-Authors: Ivan Casella, Alfeu Sguarezi, Tarcio Barros, C. E. Capovilla, Ernesto RuppertAbstract:The wind energy generation is the huge driver behind the push for supergrids and cross-border infrastructure for renewable energy systems into smart grids. To provide balance supply, demand, and storage of energy over a region in a much more efficient manner than it is done today, smart grids will need to use an advanced communication infrastructure into a robust control system. Towards this objective, it is proposed in this work a wireless coded power control employing low density parity check coding for a switched reluctance machine applied in wind generation to improve system robustness and reliability. The performance improvements of the proposed system are investigated in a more realistic frequency selective fading Propagation Condition.
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An ANFIS Power Control for Wind Energy Generation in Smart Grid Scenario Using Wireless Coded OFDM-16-QAM
Journal of Control Automation and Electrical Systems, 2014Co-Authors: Ivan R. S. Casella, R. V. Jacomini, José L. Azcue-puma, A. J. Sguarezi Filho, C. E. Capovilla, Ernesto RuppertAbstract:The wind energy generation is the huge driver behind the push for supergrids and cross-border infrastructure for renewable energy systems into smart grids. To provide balance supply, demand, and storage of energy over a region in a much more efficient manner than it is done today, smart grids will need to use an advanced communication infrastructure into a robust control system. Towards this objective, this work proposes a wireless coded orthogonal frequency division multiplexing neuro-fuzzy power control employing low density parity-check coding for a doubly fed induction aerogenerator to improve system robustness and reliability. The performance improvements of the proposed system are investigated in a more realistic frequency selective fading Propagation Condition.
C. E. Capovilla - One of the best experts on this subject based on the ideXlab platform.
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A wireless coded OFDM neuro-fuzzy power control system for doubly-fed induction aerogenerators in smart grid applications
Microwave and Optoelectronics Conference (IMOC), 2015 SBMO/IEEE MTT-S International, 2015Co-Authors: C. E. Capovilla, R. V. Jacomini, J. L. Azcue, Ivan R. S. Casella, A. J. Sguarezi FilhoAbstract:To provide balance supply, demand, and storage of energy over a region in a much more efficient manner than it is done today, smart grids will need to use an advanced communication infrastructure into a robust control system. Towards this objective, it is proposed in this work a wireless coded orthogonal frequency division multiplexing neuro-fuzzy power control employing low density parity check coding for a doubly-fed induction aerogenerator to improve system robustness and reliability. The performance improvements of the proposed system are investigated in a more realistic frequency selective fading Propagation Condition.
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A SRM Applied in Wind Generation at Smart Grids Employing Wireless Power Control
IEEE Latin America Transactions, 2015Co-Authors: Ivan Casella, Alfeu Sguarezi, Tarcio Barros, C. E. Capovilla, Ernesto RuppertAbstract:The wind energy generation is the huge driver behind the push for supergrids and cross-border infrastructure for renewable energy systems into smart grids. To provide balance supply, demand, and storage of energy over a region in a much more efficient manner than it is done today, smart grids will need to use an advanced communication infrastructure into a robust control system. Towards this objective, it is proposed in this work a wireless coded power control employing low density parity check coding for a switched reluctance machine applied in wind generation to improve system robustness and reliability. The performance improvements of the proposed system are investigated in a more realistic frequency selective fading Propagation Condition.
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An ANFIS Power Control for Wind Energy Generation in Smart Grid Scenario Using Wireless Coded OFDM-16-QAM
Journal of Control Automation and Electrical Systems, 2014Co-Authors: Ivan R. S. Casella, R. V. Jacomini, José L. Azcue-puma, A. J. Sguarezi Filho, C. E. Capovilla, Ernesto RuppertAbstract:The wind energy generation is the huge driver behind the push for supergrids and cross-border infrastructure for renewable energy systems into smart grids. To provide balance supply, demand, and storage of energy over a region in a much more efficient manner than it is done today, smart grids will need to use an advanced communication infrastructure into a robust control system. Towards this objective, this work proposes a wireless coded orthogonal frequency division multiplexing neuro-fuzzy power control employing low density parity-check coding for a doubly fed induction aerogenerator to improve system robustness and reliability. The performance improvements of the proposed system are investigated in a more realistic frequency selective fading Propagation Condition.
Sergey Dashkovskiy - One of the best experts on this subject based on the ideXlab platform.
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Almost ISS property for feedback connected systems
Automatica, 2017Co-Authors: Petro Feketa, Humberto Stein Shiromoto, Sergey DashkovskiyAbstract:Abstract Small-gain Conditions used in analysis of feedback interconnections are contraction Conditions which imply certain stability properties. Such Conditions are applied to a finite or infinite interval. In this paper we consider the case, when a small-gain Condition is applied to several disjunct intervals and use the density Propagation Condition in the gaps between these intervals to derive global stability properties for an interconnection. This extends and improves recent results from Stein Shiromoto et al. (2015).
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Almost ISS property for feedback connected systems
arXiv: Dynamical Systems, 2016Co-Authors: Petro Feketa, Humberto Stein Shiromoto, Sergey DashkovskiyAbstract:Small-gain Conditions used in analysis of feedback interconnections are contraction Conditions which imply certain stability properties. Such Conditions are applied to a finite or infinite interval. In this paper we consider the case, when a small-gain Condition is applied to several disjunct intervals and use the density Propagation Condition in the gaps between these intervals to derive global stability properties for an interconnection. This extends and improves recent results from [1].
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Example Demonstrating the Application of Small-gain and Density Propagation Conditions for Interconnections
arXiv: Systems and Control, 2016Co-Authors: Humberto Stein Shiromoto, Petro Feketa, Sergey DashkovskiyAbstract:This work provides an example that motivates and illustrates theoretical results related to a combination of small-gain and density Propagation Conditions. Namely, in case the small-gain fails to hold at certain points or intervals the density Propagation Condition can be applied to assure global stability properties. We repeat the theoretical results here and demonstrate how they can be applied in the proposed example.
Qilian Liang - One of the best experts on this subject based on the ideXlab platform.
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On the Ergodic Throughput Capacity of Massive MIMO Supported Hybrid Wireless Networks
Communications Signal Processing and Systems, 2018Co-Authors: Ganlin Zhao, Qilian LiangAbstract:In this paper, we investigate theoretical transmission capacity limit in the uplink hybrid wireless network under infrastructure mode. Massive MIMO is considered to improve network capacity. Multi-user MIMO is preferred over Point-to-Point MIMO for Massive implementation to achieve improved scalability. For ad hoc mode, without infrastructure support, Massive MIMO is not practical to implement in each user device due to the limitation of complexity. Another perspective of this paper is to include the fading effect on capacity. Under favorable Propagation Condition, Massive MIMO greatly mitigates small-scale fading effect between each user and base station antenna. Outage capacity over large-scale fading channel is derived in both low SNR and high SNR scenarios.
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On the uplink outage throughput capacity of hybrid wireless networks with Massive MIMO
Ad Hoc Networks, 2017Co-Authors: Ganlin Zhao, Qilian LiangAbstract:In this paper, we investigate theoretical transmission capacity limit of the uplink hybrid wireless network under infrastructure mode. Massive MIMO technology is assumed to be equipped on the base station to further increase the whole network throughput. Multi-user MIMO is preferred over Point-to-Point MIMO to achieve improved scalability and simplify UE design. Another perspective of this paper is to include the fading effect on capacity. Under favorable Propagation Condition, Massive MIMO greatly mitigates small scale fading effect between each user and base station antenna. Then closed-form outage capacity over large scale fading channel is derived in both low SNR and high SNR scenarios.
