With the fast development of autonomous driving, the demand of computing resources becomes a big challenge for resource-constrained vehicles. To alleviate this issue, vehicular edge computing (VEC) has been proposed t...
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With the breakthrough and development of communication technology, security of unmanned autonomous systems has become an essential problem researchers concern. This paper focuses on the problem of attack detection and...
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Emotion recognition from facial expressions is relatively easy for humans, but challenging for a machine. Emotion identification from face features is a popular application of social signal processing, especially in t...
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In this work an initial approach and requirements overview is performed in order to promote awareness on the compatibility between CMOS - MEMS sensor devices design and the group of heuristic techniques known as genet...
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In this work an initial approach and requirements overview is performed in order to promote awareness on the compatibility between CMOS - MEMS sensor devices design and the group of heuristic techniques known as genetic algorithms. As might be known, genetic algorithms (GAs) main application is in the field of multivariable functions optimization and this kind of iterative procedures in their simplest forms may be suitable to serve as a tool in the automation of design of integrated CMOS devices and technologies where the variables and restrictions are known. FGMOS-based devices along with MEMS structures when embedded in a single-chip platform (CMOS - MEMS technology) are expected to be in compliance with a set of design rules for both their mechanical and electrical properties, making easier to code and decode variables for their use in a GA in a discrete always-positive basis. In this approach, parasitic and process-resolution-related issues are neglected and further analysis based in a more detailed modeling and parameter restrictions is encouraged.
According to the electrical model and mechanical model of synchronous generator, the control model of virtual synchronous generator is deduced, and the relationship between control parameters and virtual synchronous g...
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This paper describes a laboratory control theory experiment supported by the use of a DCMotor Educational Kit. The impact, as a teaching aid, of the proposed laboratory control experiment is evaluated, having in mind ...
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The molten carbonate fuel cell (MCFC) is an important research field of the new energy generation equipment, and is a difficulty in the research field of high-temperature fuel cells at present. To aim at the MCFC mode...
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Embedded real-time systems are ubiquitous in modern society, many of which perform safety-critical functions, and therefore, it is imperative to have tools and techniques that can guarantee a high degree of system cor...
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In this work, an observer-based controller for an internal combustion engine is presented. At first, an algorithm for the estimation of an unknown function of the internal combustion engine is designed, since it is ve...
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In this work, an observer-based controller for an internal combustion engine is presented. At first, an algorithm for the estimation of an unknown function of the internal combustion engine is designed, since it is very difficult to obtain direct measurements of this variable. This estimator is based on sliding mode algorithms, providing a finite time and robust estimation, using only measurements from the velocity of the engine. On the other hand, with the measured velocity and the estimates of the other variables, a robust controller is synthesized for the engine. In order to considerate the actuator dynamics, the proposed control scheme is based on the master-slave structure, regarding the controller for the actuator as the slave one. For this scheme, the backstepping algorithm is used to design the master controller. Then, the calculated control input signal to the engine is used as a reference for the throttle actuator which is driven by a direct current (DC) motor. Thus, a high-order sliding mode controller is applied to the actuator in order to track the control input signal and reject perturbations, as the applied mechanical load, regulating the velocity of the combustion engine. Numerical simulations show the efficient performance of this proposal.
The development of modulation schemes that avoid any detrimental effect on the quality of illumination become a major challenge in the design of Visible Light Communication (VLC) systems. This paper is focused on the ...
The development of modulation schemes that avoid any detrimental effect on the quality of illumination become a major challenge in the design of Visible Light Communication (VLC) systems. This paper is focused on the transmission of data using the available bandwidth of white light emitting diode (LED). The design of encoding and decoding waveforms for spectral Code Division Multiple Access (CDMA)-based VLC is considered. Unlike conventional temporal encoding direct sequence (DS) CDMA, code information is impressed on amplitudes of sub-bands. The light source is modulated by a sequence of short pulses using temporal spreading allowing control of leakage in the direct current (DC) sub-band thereby mitigating the harmful flicker effect. In order to ensure that illumination does not present unwanted changes of brightness, the chromaticity of the white light source is maintained by inserting pilots embedded in the spectra of signature waveforms. A noncoherent ultra-wideband (UWB) energy detector based on transversal filter (TF) processing is investigated. It is seen that the despread operation converts energy from matched waveforms, whereas unmatched codes, which constitutes the foremost source of interference in the VLC channel, can be fully rejected. Advantages and challenges of the spectral proposal are discussed.
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