The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
Qilian Liang - One of the best experts on this subject based on the ideXlab platform.
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Game Theoretical Method for sum-rate maximization in full-duplex Massive MIMO Heterogeneous Networks
Signal Processing, 2016Co-Authors: Shitong Yuan, Qilian LiangAbstract:In this paper, we consider Massive MIMO in two-layer Heterogeneous Networks. The system has a large self-interference and co-channel interference due to operation in full-duplex mode. By using Game Theory, an optimized sum-rate is achieved. We investigate the potential sum-rate before and after the optimization under the power constraints. It is shown that the game Theoretical Method performed a very good access scheduling. Compared to non-optimized model, game Theoretical Method can achieve higher sum-rate. HighlightsWe modeled a two-layer HetNets with Massive MIMO applied. The system works in full-duplex mode. Even full-duplex leads a huge interference, it is a more efficient system.The game Theoretical Method is chosen to decline the effect of interference. A game was built base on this scenario.By applying the game Theoretical Method, the maximum system sum rate is reached. In the experiment game Theoretical Method indeed perform better (higher sum rate) than random access Method. It performed a better access scheduling in a dynamic system.It turns out that users' power constraint (UL transmission and DL receiving constraints) is the major factor which limits system's performance. And compared to non-optimized model, game Theoretical Method has a better antiinterference ability.
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MASS - Game Theoretical Method for Sum-Rate Maximization in Full-Duplex Massive MIMO Heterogeneous Networks
2015 IEEE 12th International Conference on Mobile Ad Hoc and Sensor Systems, 2015Co-Authors: Shitong Yuan, Qilian LiangAbstract:In this paper, we consider massive MIMO in two-layer Heterogeneous Networks. The system has a large self-interference and co-channel interference due to operating in full-duplex mode. By using Game Theory, an optimized sum-rate is achieved. We investigate the potential sum-rate before and after the optimization under the power constraints. It is shown that the game Theoretical Method performed a very good access scheduling. Compared to non-optimized model, game Theoretical Method can achieve higher sum-rate.
Shitong Yuan - One of the best experts on this subject based on the ideXlab platform.
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Game Theoretical Method for sum-rate maximization in full-duplex Massive MIMO Heterogeneous Networks
Signal Processing, 2016Co-Authors: Shitong Yuan, Qilian LiangAbstract:In this paper, we consider Massive MIMO in two-layer Heterogeneous Networks. The system has a large self-interference and co-channel interference due to operation in full-duplex mode. By using Game Theory, an optimized sum-rate is achieved. We investigate the potential sum-rate before and after the optimization under the power constraints. It is shown that the game Theoretical Method performed a very good access scheduling. Compared to non-optimized model, game Theoretical Method can achieve higher sum-rate. HighlightsWe modeled a two-layer HetNets with Massive MIMO applied. The system works in full-duplex mode. Even full-duplex leads a huge interference, it is a more efficient system.The game Theoretical Method is chosen to decline the effect of interference. A game was built base on this scenario.By applying the game Theoretical Method, the maximum system sum rate is reached. In the experiment game Theoretical Method indeed perform better (higher sum rate) than random access Method. It performed a better access scheduling in a dynamic system.It turns out that users' power constraint (UL transmission and DL receiving constraints) is the major factor which limits system's performance. And compared to non-optimized model, game Theoretical Method has a better antiinterference ability.
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MASS - Game Theoretical Method for Sum-Rate Maximization in Full-Duplex Massive MIMO Heterogeneous Networks
2015 IEEE 12th International Conference on Mobile Ad Hoc and Sensor Systems, 2015Co-Authors: Shitong Yuan, Qilian LiangAbstract:In this paper, we consider massive MIMO in two-layer Heterogeneous Networks. The system has a large self-interference and co-channel interference due to operating in full-duplex mode. By using Game Theory, an optimized sum-rate is achieved. We investigate the potential sum-rate before and after the optimization under the power constraints. It is shown that the game Theoretical Method performed a very good access scheduling. Compared to non-optimized model, game Theoretical Method can achieve higher sum-rate.
Sébastien Fouques - One of the best experts on this subject based on the ideXlab platform.
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Theoretical study of the water entry of a body in waves application to safety of occupants in free fall lifeboats
ASME 2009 28th International Conference on Ocean Offshore and Arctic Engineering, 2009Co-Authors: Thomas Michel Sauder, Sébastien FouquesAbstract:The safety of occupants in free-fall lifeboats (FFL) during water impact is addressed. The first part of the paper describes a Theoretical Method developed to predict the trajectory in six degrees of freedom of a body entering water waves. Slamming forces and moments are computed, based on momentum conservation, long wave approximation and a von Karman type of approach. The added mass matrix of the body is evaluated for impact conditions by a boundary element Method. The second part of the paper focuses on the application of the Method to free-fall lifeboats, which are used for emergency evacuation of oil platforms or ships. Acceleration loads on FFL occupants during water impact are dependent on numerous parameters, especially the hull shape, the mass distribution, the wave heading relative to the lifeboat, and the impact point on the wave surface. Assessing operational limits of FFL by means of model tests only has therefore been costly and time consuming. This issue is addressed here by applying the Theoretical Method described in the first part. The model has been validated for FFL through extensive model testing in calm water and regular waves, and statistical estimates of acceleration levels for lifeboat occupants, as well as acceleration time series were obtained that can be used as inputs to numerical human response models.© 2009 ASME
Takeshi Iwasa - One of the best experts on this subject based on the ideXlab platform.
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Theoretical Method for near field raman spectroscopy with multipolar hamiltonian and real time tddft application to on and off resonance tip enhanced raman spectroscopy
Journal of Chemical Physics, 2021Co-Authors: Masato Takenaka, Tetsuya Taketsugu, Takeshi IwasaAbstract:Tip-enhanced Raman spectroscopy in combination with scanning tunneling microscopy could produce ultrahigh-resolution Raman spectra and images for single-molecule vibrations. Furthermore, a recent experimental study successfully decoupled the interaction between the molecule and the substrate/tip to investigate the intrinsic properties of molecules and their near-field interactions by Raman spectroscopy. In such a circumstance, more explicit treatments of the near field and molecular interactions beyond the dipole approximation would be desirable. Here, we propose a Theoretical Method based on the multipolar Hamiltonian that considers full spatial distribution of the electric field under the framework of real-time time-dependent density functional theory. This approach allows us to treat the on- and off-resonance Raman phenomena on the same footing. For demonstration, a model for the on- and off-resonance tip-enhanced Raman process in benzene was constructed. The obtained Raman spectra are well understood by considering both the spatial structure of the near field and the molecular vibration in the off-resonance condition. For the on-resonance condition, the Raman spectra are governed by the transition moment, in addition to the selection rule of off-resonance Raman. Interestingly, on-resonance Raman can be activated even when the near field forbids the π–π* transition at equilibrium geometry due to vibronic couplings originating from structural distortions.
Tetsuya Taketsugu - One of the best experts on this subject based on the ideXlab platform.
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Theoretical Method for near field raman spectroscopy with multipolar hamiltonian and real time tddft application to on and off resonance tip enhanced raman spectroscopy
Journal of Chemical Physics, 2021Co-Authors: Masato Takenaka, Tetsuya Taketsugu, Takeshi IwasaAbstract:Tip-enhanced Raman spectroscopy in combination with scanning tunneling microscopy could produce ultrahigh-resolution Raman spectra and images for single-molecule vibrations. Furthermore, a recent experimental study successfully decoupled the interaction between the molecule and the substrate/tip to investigate the intrinsic properties of molecules and their near-field interactions by Raman spectroscopy. In such a circumstance, more explicit treatments of the near field and molecular interactions beyond the dipole approximation would be desirable. Here, we propose a Theoretical Method based on the multipolar Hamiltonian that considers full spatial distribution of the electric field under the framework of real-time time-dependent density functional theory. This approach allows us to treat the on- and off-resonance Raman phenomena on the same footing. For demonstration, a model for the on- and off-resonance tip-enhanced Raman process in benzene was constructed. The obtained Raman spectra are well understood by considering both the spatial structure of the near field and the molecular vibration in the off-resonance condition. For the on-resonance condition, the Raman spectra are governed by the transition moment, in addition to the selection rule of off-resonance Raman. Interestingly, on-resonance Raman can be activated even when the near field forbids the π–π* transition at equilibrium geometry due to vibronic couplings originating from structural distortions.
