Hybrid systems with memory are dynamical systems exhibiting both hybrid and delay phenomena. We present a general modelling framework for such systems using hybrid functional inclusions, whose generalized solutions ar...
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The analytical evaluation of the average bit error rate (ABER) performance of a digital multihop transmission system operating in the presence of co-channel interference and Rayleigh fading is presented. It is assumed...
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ISBN:
(纸本)9781479980925
The analytical evaluation of the average bit error rate (ABER) performance of a digital multihop transmission system operating in the presence of co-channel interference and Rayleigh fading is presented. It is assumed that the number of interferers at each relay node and the destination is a binomial random variable that belongs to a binomial point process. Analytical expressions for the ABER of Amplify-and-Forward and Decode-and-Forward relaying in terms of a single integral that can be easily evaluated numerically, are derived. An asymptotic analysis is employed to obtain simple ABER approximations and optimize the power allocation and location of the relays. Finally, the analytical results are validated with computer simulations.
We study vector space interference alignment for the multiple-input multiple-output interference channel with no time or frequency diversity, and no symbol extensions. We prove both necessary and sufficient conditions...
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The purpose of this study is to summarize the status of current smart meter deployment initiatives in the United States. This paper presents the findings from a survey that was sent to US utility companies listed on t...
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In this issue of IEEE controlsystems Magazine, we speak with João Hespanha, who is a professor and chair of the department of electrical and computerengineering and Director of the Center for control, Dynamical...
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This paper addresses the H 2 state estimation problem in the context of sampled-data systems, which is closely related to H 2 filtering design under limited bandwidth constraints. Our first approach considers a fixe...
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This paper addresses the H 2 state estimation problem in the context of sampled-data systems, which is closely related to H 2 filtering design under limited bandwidth constraints. Our first approach considers a fixed data-rate setting, for which a discrete-time equivalent system is devised and, based on this concept, sufficient conditions for the H 2 filtering design are yielded. These results are then generalized to obtain a robust filter that is able to cope with uneven data-rates. Academical examples illustrate the theoretical results and point out the main characteristics of the design techniques devised in this paper.
This paper proposes strategies for the driving and egress of a vehicle with a humanoid robot. To drive the vehicle, the RANSAC method was used to detect obstacles, and the Wagon model was used to control the steering ...
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ISBN:
(纸本)9781479968862
This paper proposes strategies for the driving and egress of a vehicle with a humanoid robot. To drive the vehicle, the RANSAC method was used to detect obstacles, and the Wagon model was used to control the steering and velocity of the vehicle with only a limited number of sensors which were installed on the humanoid robot. Additionally, a manual teleoperating method was used with the lane projection technique. For the egress motion, gain override and the Cartesian position/force control technique were used to interact with the vehicle structure. To overcome the disadvantages of a highly geared manipulator, a special technique was used that included modelled friction compensation and a non-complementary switching mode. DRC-HUBO+ used the proposed method to perform a vehicle driving and egress task in the DRC finals 2015.
A model-based dynamic analysis of a variable-speed wind generator system consisting of an induction generator connected to the grid through a full power frequency converter is conducted. To this end, a nonlinear model...
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Previous studies of quantum chaotic scattering established a connection between classical dynamics and quantum transport properties: Integrable or mixed classical dynamics can lead to sharp conductance fluctuations bu...
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Previous studies of quantum chaotic scattering established a connection between classical dynamics and quantum transport properties: Integrable or mixed classical dynamics can lead to sharp conductance fluctuations but chaos is capable of smoothing out the conductance variations. Relativistic quantum transport through single-layer graphene systems, for which the quasiparticles are massless Dirac fermions, exhibits, due to scarring, this classical-quantum correspondence, but sharp conductance fluctuations persist to a certain extent even when the classical system is fully chaotic. There is an open issue regarding the effect of finite mass on relativistic quantum transport. To address this issue, we study quantum transport in chaotic bilayer graphene quantum dots for which the quasiparticles have a finite mass. An interesting phenomenon is that, when traveling along the classical ballistic orbit, the quasiparticle tends to hop back and forth between the two layers, exhibiting a Zitterbewegung-like effect. We find signatures of abrupt conductance variations, indicating that the mass has little effect on relativistic quantum transport. In solid-state electronic devices based on Dirac materials, sharp conductance fluctuations are thus expected, regardless of whether the quasiparticle is massless or massive and whether there is chaos in the classical limit.
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