The paper summarizes fuzzy linear models that were introduced in fuzzy regression analysis. The exhaustive review is extended with new models. This contribution is intended as a guide for implementing known fuzzy regr...
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We demonstrate from a theoretical point of view that the OR and NOR logic gates can be implemented with the application of well-arranged, existing fluorescent photoswitchable proteins, driven by well-designed photon p...
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The orbital occupancy, as the origin of Hund's rule coupling, provides critical information in understanding the multiorbital iron-based superconductors. The one-unit-cell (1UC) FeSe thin film on a SrTiO3 substrat...
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The orbital occupancy, as the origin of Hund's rule coupling, provides critical information in understanding the multiorbital iron-based superconductors. The one-unit-cell (1UC) FeSe thin film on a SrTiO3 substrate with superconductive Tc above 60 K has been reported with unique electronic structures as well as orbital occupancy. In this paper, we present the x-ray absorption spectroscopy and resonant inelastic x-ray scattering (RIXS) study of the FeSe/STO thin films of different thicknesses. Together with the atomic multiplet simulation analysis, the FeSe/STO thin films (from 1UC to 10UC) are shown with the pure 3d6 electronic configuration which is identical to the bulk FeSe. Moreover, 1UC FeSe/STO is found to be distinctively more persistent in hosting the 3d6 configuration other than the thicker films under the oxidization process. The robustness of the 3d6 in 1UC FeSe/STO is discussed as a result of charge transfer from the substrate, as well as a mechanism to maintain the high-Tc superconductivity. Finally, our research calls for a further high-resolution RIXS study of the pristine superconductive 1UC FeSe/STO thin film.
In this paper a multi-modelling experiment is presented through which we have studied the possibilities of manufacturing process control supported by different digital simulation models. The main pillar of the study i...
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The paper provides astatism analysis of controllers with time delays arising from compensation schemes such as internal model control and Smith predictor. As the rather straightforward result a condition for the astat...
The paper provides astatism analysis of controllers with time delays arising from compensation schemes such as internal model control and Smith predictor. As the rather straightforward result a condition for the astatism is provided. From the spectral analysis, it results that even if all the infinitely many roots of the controller lie on the imaginary axis, the astatism brought by the root at the origin is predominant in the controller responses. Subsequently, applying the final value theorem, a methodology to derive the asymptotic slope of the astatic time delay controller is proposed. Besides, delay approximation based methods such as Maclaurin series and Pade approximation are involved in the analysis. The presented research is motivated by broader analysis of time delay controllers towards effective design of anti-windup schemes. Full understanding of the astatism nature is the key aspect for this research task.
The vast majority of the software developers use the agile framework for project management. Agile approach provides more flexibility and adaption to the changes against classic software development approach. The key ...
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The objective of this paper is to discuss the possibility of applying multi-agent approaches for tasks of control and management of microgrids. It presents an attempt to synthesize a Multi-Agent System (MAS) and to de...
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Trends and perspective directions in the field of pneumatic equipment and systems are first identified in the paper. Special attention is given to identifying the equipment and systems that can be adapted to the requi...
Trends and perspective directions in the field of pneumatic equipment and systems are first identified in the paper. Special attention is given to identifying the equipment and systems that can be adapted to the requirements imposed by a new industrial revolution - Industry 4.0. Pneumatics will continue to be an important domain and the paper presents arguments for that. The current stage of proportional pneumatics is presented and a comparison between analog and digital proportional pneumatics is made. In the final part of the paper an experimental model of a distributor controlled with modulated pulses is presented. The distributor is integrated in a system that controls the pressure in a reference volume.
Smart buildings viewed as cyber-physical systems are currently a growing research topic oriented towards collaborative groups of buildings. Since buildings consume significant amount of energy, research efforts have c...
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Smart buildings viewed as cyber-physical systems are currently a growing research topic oriented towards collaborative groups of buildings. Since buildings consume significant amount of energy, research efforts have concentrated to make them more efficient, in particular the Heating, Ventilation and Air-Conditioning (HVAC) systems that represent more than 40% of the buildings' energy budget. A key piece of information that facilitates the design of energy efficient HVAC systems, in particular in commercial buildings, is the knowledge of the real-time and predicted occupancy, which would allow an automatic control process to balance the trade-off between energy use and quality of comfort. In practice however, occupancy counting devices are not being wide-spread deployed in the market, so in order to move forward, we believe it is important to estimate occupancy using existing sensors currently deployed in buildings. In this work, we propose to use a combination of sensor data currently available in buildings, such as CO 2 data and airflow, and develop a supervised learning framework that uses existing data to estimate occupancy. We developed two data-driven techniques based on Random Forest (RF) and KNN algorithms to estimate occupancy based on data collected from 4 rooms. Our results show an average RMSE occupancy error that varies from 3.10 to 11.21 for RF (depending on the room) and 2.96 to 8.46 for KNN, with best case results of 1.08 and 0.97 respectively. We believe that our framework can be integrated into existing Building Management Systems (BMS) control processes to improve energy efficiency in smart buildings.
The paper is aimed atto a study of a possibility to use PCM (Phase Change Materials) to increase the thermal storage properties of buildings. For this purpose, both the experimental testing and computer modelling were...
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