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2024 IEEE International Conference on systems, Man, and Cybernetics, SMC 2024

作者： D'Aniello, Giuseppe Falcone, Roberto Gaeta, Matteo Rehman, Zia Ur Fortino, Giancarlo University of Salerno Dept. Information and Electrical Engineering and Applied Mathematics SA Fisciano Italy University of Calabria Dept. Computer Engineering Modeling Electronics and Systems Cs Rende Italy

ISBN: (纸本)9781665410205

Human activity prediction has become increasingly prevalent in a plethora of time-critical applications. To realize accurate identification and prediction of human behaviour, we propose a situation-aware wearable computing system. A wearable computing system has the capability to perceive, comprehend and project situations by analyzing the human behavioral patterns in different environments. In particular, this work proposes a situation-aware human activity prediction (SA-HAP) approach based on sequential pattern mining that aims to anticipate future activities and tailor its responses according to situations by analyzing frequent sequential patterns and their correlations to understand how these situations are interrelated. The approach not only improves prediction accuracy but also provide the foundation for a more informed decision-making process, as the projected situations can be explained using the identified behavioral patterns. The approach is compared with other traditional techniques for activity prediction (LSTM and HMM), achieving better performance on the Extrasensory dataset. © 2024 IEEE.

关键词： Prediction models

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Effects of Elastic Interactions Between Adsorbate and Substrate in Nano-Structuring of Thin Films During Deposition

Effects of Elastic Interactions Between Adsorbate and Substr...

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International Conference on Nanomaterials: Application & Properties (NAP)

作者： Alina Dvornichenko Vasyl Kharchenko Yuliia Rozghon Dept. of Applied Mathematics and Modeling of Complex Systems Sumy State University Sumy Ukraine Institute of Applied Physics National Academy of Sciences of Ukraine Sumy State University Sumy Ukraine

ISBN: (数字)9798350380125

ISBN: (纸本)9798350380132

In this study, we investigate the role of elastic interactions between the substrate and adsorbed particles in the structuring processes of thin films. We present a reaction-diffusion model for nanostructure formation on the first deposited layer of a multilayer adsorptive system. Analyzing a homogeneous system, we demonstrate a possibility of firstorder transitions. In the framework of stability analysis we show that increased elastic energy induces pattern formation. We discuss an influence of elastic energy on the kinetics of nanostructured thin film growth and the statistical properties of surface structures.

关键词： Pattern formation Perturbation methods Adsorption Nonhomogeneous media Stability analysis Surface structures Kinetic theory Surface treatment Substrates

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Peculiarities of Nanoscale α’-phase Precipitation in Fe-Cr-Al Alloys During Thermal Treatment

Peculiarities of Nanoscale α’-phase Precipitation in Fe-Cr...

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International Conference on Nanomaterials: Application & Properties (NAP)

作者： Vasyl Kharchenko Dmitrii Kharchenko Borys Lysenko Alina Dvornichenko Institute of Applied Physics National Academy of Sciences of Ukraine Sumy Ukraine Sumy State University Sumy Ukraine Dept. Applied mathematics and Modeling of Complex Systems Sumy State University Sumy Ukraine

ISBN: (数字)9798350380125

ISBN: (纸本)9798350380132

A generalized phase field model to simulate the dynamics of microstructural transformations in iron-based ${Fe}-{Cr}-{Al}$ alloys, incorporating the dynamics of equilibrium point defects is developed. The study of the formation and growth processes of chromium-enriched precipitates of the $\alpha^{\prime}$ phase during prolonged annealing of solid solution is provided. The impact of alloying element concentration and annealing temperature on the dynamic and statistical characteristics of the growing precipitates is examined. The scaling dynamics of the average precipitate size, their number, and the universality of their distribution over sizes are demonstrated.

关键词： Solid modeling Annealing Precipitation Simulated annealing Solids Numerical simulation Nanoscale devices Alloying Stability analysis Separation processes

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A data-driven approach for context definition in situation-aware wearable computing systems

A data-driven approach for context definition in situation-a...

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IEEE International Conference on Automation Science and Engineering (CASE)

作者： Giuseppe D’Aniello Giancarlo Fortino Matteo Gaeta Zia Ur Rehman Dept. Information and Electrical Engineering and Applied Mathematics University of Salerno Fisciano Italy Dept. Computer Engineering Modeling Electronics and Systems University of Calabria Rende Italy

ISBN: (数字)9798350358513

ISBN: (纸本)9798350358520

A situation-aware wearable computing system is defined as a wearable device with the capability to perceive, comprehend, and project the situations occurring in the environment in order to adapt its behavior accordingly. For this kind of devices, the identification of complex situations related to the activities performed by users in various contexts is of great interest. This requires the capability to identify context states. A well-known technique for this task is the Context Space Theory (CST), which provides a multidimensional space representing contexts. Although powerful and lightweight, this technique has the drawback of requiring manual definition of such a space, a time-consuming process that involves domain experts. To address this issue, this work proposes a data-driven approach for defining context spaces in CST using kernel density estimation. This approach is compared with a state-of-theart expert-based CST technique and a fuzzy inference system for context representation, demonstrating superior performance on the Extrasensory dataset.

关键词： Performance evaluation Fuzzy logic Computer aided software engineering Estimation Manuals Computer architecture Feature extraction Object recognition Wearable devices Kernel

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A Sequential Pattern Mining Approach for Situation-Aware Human Activity Projection

A Sequential Pattern Mining Approach for Situation-Aware Hum...

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IEEE International Conference on systems, Man and Cybernetics

作者： Giuseppe D'Aniello Roberto Falcone Matteo Gaeta Zia Ur Rehman Giancarlo Fortino Dept. Information and Electrical Engineering and Applied Mathematics University of Salerno Fisciano SA Italy Dept. Computer Engineering Modeling Electronics and Systems University of Calabria Rende Cs Italy

ISBN: (数字)9781665410205

ISBN: (纸本)9781665410212

关键词： Accuracy Correlation Decision making Hidden Markov models Medical services Predictive models Time factors Wearable devices Long short term memory Cybernetics

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A High-precision System for Processing Images of the Physical Model of the Impeller Obtained by the Optical System in Transmitted and Reflected Light 11

A High-precision System for Processing Images of the Physica...

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Optoelectronic Imaging and Multimedia Technology XI 2024

作者： Pivkin, Petr M. Ershov, Artem A. Grechishnikov, Vladimir A. Prus, Mikhail Yu. Yazev, Anton M. Jiang, Xiaohui Uvarova, Luidmila A. Nadykto, Alexey B. Lab. of Micromachining Technologies Moscow State University of Technology "STANKIN" Moscow127055 Russia Dept. of Cutting Tools and Machining Technologies Moscow State University of Technology "STANKIN" Moscow127055 Russia Laboratory of Digital Modeling of Cyber-Physical Tool Systems Moscow State University of Technology "STANKIN" Moscow127055 Russia Dept. of Applied Mathematics Moscow State University of Technology "STANKIN" Moscow127055 Russia University of Shanghai for Science and Technology Shanghai200093 China

ISBN: (纸本)9781510682061

The paper presents the development of a high-precision system for processing images of the physical model of the impeller obtained by the optical system in transmitted and reflected light. The paper presents the development of a high-precision system for processing images of the physical model of the impeller obtained by the optical system in transmitted and reflected light. The basis for increasing the accuracy of impeller geometry control is the assumption that there exist a correlation between the accuracy of the entire blade surface and the accuracy of the optically accessible zone of the blade if the conditions for shaping the blade surface are met in the optically accessible for measurements zone. In this work, the controlling trajectory for the measuring machine during the formation of a set of control images on the base of numerically relationships between the positioning coordinates of the cutter during 5-axis processing and conditions of the contact of the cutter . Thus, the image processing system allows to establish, based on a set of focal zones in images, the relationship between the coordinates of a physical object. The developed method allows for not only a significant increase in the measurement speed, but also for the identification and elimination of error in the contact of the cutter with the workpiece surface. A method for setting up a measuring machine is proposed, which ensures the required accuracy of product control during multi-coordinate high-speed milling. Based on the operation of the proposed system, the results of geometric accuracy measurements, linear and angular measurements and studies of the properties of machined surfaces of products equipped with slot of various shapes between blades are obtained. © 2024 SPIE.

关键词： Angle measurement

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A new method for identifying the key indicators and dependencies in the processing of images of helical surfaces of conical cutters obtained with the optical measuring machine 11

A new method for identifying the key indicators and dependen...

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Optoelectronic Imaging and Multimedia Technology XI 2024

作者： Pivkin, Petr M. Yazev, Anton M. Nazarenko, Ekaterina S. Ershov, Artem A. Kuznetsov, Vladimir A. Karpov, Maxim A. Zelensky, Alexander A. Jiang, Xiaohui Huang, Zhiwen Yao, Rao Tcherniega, Nikolay V. Kudryavceva, Anna D. Uvarova, Liudmila A. Nadykto, Alexey B. Lab. of Digital Modeling of Cyber-Physical Tool Systems Moscow State University of Technology "STANKIN" Moscow127055 Russia Lab. of Micromachining Technologies Moscow State University of Technology "STANKIN" Moscow127055 Russia Dept. of Cutting Tools and Machining Technologies Moscow State University of Technology "STANKIN" Moscow127055 Russia Dept. of Applied Mathematics Moscow State University of Technology "STANKIN" Moscow127055 Russia P. N. Lebedev Physical Institute Moscow119991 Russia University of Shanghai for Science and Technology Shanghai200093 China Shanghai University of Engineering Science Shanghai201620 China

ISBN: (纸本)9781510682061

In this study, a new method for identifying the key indicators and dependencies in processing images of helical surfaces of conical cutters at the main stages of the production cycle, which is based on the relationships between the shape of the cutting edges, the angle of inclination of the helical flute, clearance angle, color intensity and image brightness, has been developed. Design and geometric parameters were exported from the simulations with the model created by the automated system for designing conical cutters, which determines the dimensions, shape and geometric parameters of the cutting part of the tool. The identified dependencies allow determining the active zone and the transfer coefficient at the interface between the rear surface and the measuring machine and a stable connection is carried out with a group of cutting part parameters obtained from the results of the CAD system. A high-resolution image of the flank surface boundary zone is scanned with an optical camera on a specialized machine, and the improved method was used to quantitatively calculate the boundary The controlled measurements of a set of point coordinates and geometric parameters of the helical surface of a conical cutter forms a system for a comprehensively studying the designs of conical cutters and the physical mechanisms of their production using image analysis based on the developed indicator interpretation system, which is a foundation for a unified digital cyber-physical production system to be developed. The combination of improved performance or expanded functional capabilities with increased rigidity and reliability, which enables the processing of a wider range of structural designs of part surfaces, is the primary competitive advantage of the new generation of cutting tools with unique working surface geometries. These tools are designed and manufactured using a developed cyber-physical system from contemporary tool materials. With the least amount of frames, the new me

关键词： Cutting

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Breakup of small aggregates in bounded and unbounded turbulent flows 14

Breakup of small aggregates in bounded and unbounded turbule...

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14th European Turbulence Conference, ETC 2013

作者： Babler, Matthaus U. Biferale, Luca Brandt, Luca Feudel, Ulrike Guseva, Ksenia Lanotte, Alessandra S. Marchioli, Cristian Pecile, Eros Picano, Francesco Sardina, Gaetano Soldati, Alfredo Toschi, Federico Dept. Chemical Engineering and Technology KTH Royal Institute of Technology Stockholm Sweden Dept. Physics INFN University of Rome Tor Vergata Rome Italy Linné FLOW Center KTH Mechanics Stockholm Sweden Theoretical Physics Complex Systems ICBM University of Oldenburg Oldenburg Germany ISAC-CNR INFN Sez. Lecce Lecce Italy Dept. Mathematics and Computer Science University of Udine Udine Italy Dept. of Fluid Mechanics CISM Udine University of Udine Udine Italy Dept. Applied Physics Eindhoven University of Technology Eindhoven Netherlands

Breakup of small tracer-like aggregates is studied by means of numerical simulations in four different flows, namely homogeneous isotropic turbulence, smooth stochastic flow, turbulent channel flow, and developing boundary layer flow. Aggregate breakup occurs when the local hydrodynamic stress σ ∼ Ε1/2, where Ε is the local energy dissipation, overcomes a given threshold value σcr [or equivalently Εcr ∼ σcr2 ] characteristic for a given type of aggregates. Following the aggregate trajectory upon release and detecting the first occurrence of local energy dissipation exceeding the predefined threshold allows for estimating the breakup rate as a function of Εcr. Results show that the breakup rate decreases with increasing threshold. For small values of the threshold, this decrease assumes consistent scaling among the different flows which is explained by universal small scale flow properties. Copyright © ETC 2013 - 14th European Turbulence *** rights reserved.

关键词： Aggregates

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Solving Lur'e equations through zeroing neural networks

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Information Sciences 2025年 718卷

作者： Yu He Xiaojuan Wang Yafei Tie Huanqi Yang Theodore E. Simos Spyridon D. Mourtas Vasilios N. Katsikis School of Computer Science and Artificial Intelligence Huanghuai University Zhumadian 463000 China Henan International Joint Laboratory of Behavior Optimization Control for Smart Robots Henan 463000 China Henan Key Laboratory of Smart Lighting Zhumadian 46300 China Hangzhou Dianzi University School of Mechanical Engineering Er Hao Da Jie 1158 Xiasha Hangzhou 310018 China Center for Applied Mathematics and Bioinformatics Gulf University for Science and Technology West Mishref 32093 Kuwait Section of Mathematics Dept. of Civil Engineering Democritus Univ. of Thrace Xanthi 67100 Greece Department of Economics Division of Mathematics-Informatics and Statistics-Econometrics National and Kapodistrian University of Athens Sofokleous 1 Street 10559 Athens Greece Laboratory “Hybrid Methods of Modelling and Optimization in Complex Systems” Siberian Federal University Prosp. Svobodny 79 660041 Krasnoyarsk Russia

Solving Lur'e equations plays a critical role in addressing linear-quadratic optimal control (LQOC) problems, especially in cases where the control cost matrices are singular. This paper introduces, for the first time, two novel zeroing neural network (ZNN) models—ZNNLE and ZNNLE-LQOC—specifically designed to solve the Lur'e equation system and the LQOC problem, respectively. The proposed models extend the applicability of the ZNN methodology to these challenging scenarios by offering robust and efficient solutions to time-varying matrix equations. Theoretical analyses confirm the validity of both models, while numerical simulations and practical applications demonstrate their effectiveness. Moreover, a comparative study with an enhanced alternating-direction implicit (ADI) method highlights the superior performance of the ZNNLE-LQOC model in solving LQOC problems.

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Closed Loop Fault Detectability Based on a Gap-Metric 2

Closed Loop Fault Detectability Based on a Gap-Metric

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2nd IEEE Conference on Control Technology and Applications, CCTA 2018

作者： Sekunda, Andre Ding, Steven Kjolstad Poulsen, Niels Niemann, Henrik Department of Electrical Engineering Automation and Control Tech. University of Denmark Kgs. LyngbyDk-2800 Denmark Dept. of Automatic Control and Complex Systems University of Duisburg-Essen Duisburg47057 Germany Dept. of Applied Mathematics and Computer Science Tech. University of Denmark Kgs. LyngbyDk-2800 Denmark

ISBN: (纸本)9781538676981

systems are often controlled using feedback loops. Fault diagnosis schemes are usually designed assuming that there is no feedback loop. Therefore fault diagnosis methods need to accommodate for the feedback loop. One such method is active fault diagnosis based on a fault signature system. This method is derived using the YJBK parametrisation, named after Youla, Jabr, Bongiorno and Kucera. It uses the derived fault signature system to determine the detectability of possible faults in the system. Deriving the fault signature system requires knowledge about the controller. This paper demonstrates the possibility of estimating the detectability of faults in the fault signature system using a gap-metric. The gap-metric has the advantage of only requiring knowledge about the plant. By using the gap-metric it is possible to estimate the detectability of faults without using information about the controller. © 2018 IEEE.

关键词： Fault detection

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