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IEEE International Symposium on Intelligent Signal Processing

作者： S. Kozak R. Memersheimer A. Kozakova Department of Automatic Control Systems Faculty of Electrical Engineering and Information Technology Slovak University of Technology Bratislava Slovakia

The paper deals with robust intelligent control of linear dynamical systems using algebraic polynomial theory in combination with the genetic algorithms (GA). It shows that the conventional robust polynomial synthesis approach can be successfully modified so as to improve performance by applying genetic algorithms for tuning controller parameters. A general algorithm has been developed for optimal polynomial controller tuning that enables to generate optimal and robust control actions for both SISO and MIMO systems. Moreover, the proposed methodology guarantees finding global optimum and enables achieving a higher performance compared with the conventional approaches. The proposed robust intelligent algorithm involving the intelligent searching procedure has been tested on a case study (control of a servo system with a changing momentum of inertia). Obtained results verify the possibility to improve the performance using combination of a polynomial algebraic controller and a genetic algorithm.

关键词： Robust control Genetic algorithms Polynomials Control systems Intelligent control Control system synthesis Optimal control MIMO System testing Servomechanisms

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Estimation of state of charge in a solar charging system using artificial neural networks for lead-acid batteries

Estimation of state of charge in a solar charging system usi...

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International Conference on Green Energy, Computing and Intelligent technology 2024 (GEn-CITy 2024)

作者： Muhammad Yahya Dwiyantara Suyanto Ali Musyafa Muhammad Khamim Asy'ari Department of Physics Engineering Faculty of Industrial Technology and Systems Engineering Institut Teknologi Sepuluh Nopember Surabaya Indonesia

ISBN: (数字)9781837242863

Solar panel, as a renewable energy source, require batteries to store the generated energy. Continuous use of batteries can l ead to capacity reduction and performance decline. To address this issue, it is important to have a system that can estimate the State of Charge (SOC) of the battery to control the charging process and maintain optimal battery performance. This research develo ps an SOC estimation system for lead-acid batteries by applying the Artificial Neural Network (ANN) algorithm. The ANN method has several advantages, such as more efficient iteration processes, increased speed in parameter updates, and the ability to achieve convergence more quickly. Meanwhile, the ANN algorithm also offers advantages in ease of implementation and better interpretability. The SOC estimation results for a 48V, 12Ah lead-acid battery using the ANN algorithm show that the training phase reveals a compelling regression plot, demonstrating an impressive R value of 0.99979. The minuscule error rate in the prediction system unequivocally affirms the exceptional quality of this ANN model.

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Experimental study on major parameters of fractography for concrete

Journal of Structural and Construction Engineering

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Journal of Structural and Construction engineering 2014年第698期79卷 437-444页

作者： Satoh, Ayumi Yamada, Kanji Ishiyama, Satoru Architectural and Civil Engineering Graduate School of Science and Technology Kumamoto University Japan Dept. of Architecture and Environment Systems Faculty of Systems Science and Technology Akita Prefectural University Japan

This study discusses experimentally the relationship between the major nine parameters used for fractography of concrete and the mechanical properties of the specimens. The authors employed 18 types of specimens made of different mix proportions of concrete with a different maximum size, a different quantity, a different fineness modulus and the brand of aggregates, but the water-to-cement ratio is about the same. They include not only monolithic specimens made of cement paste or mortar, but also jointed specimens with placing joint at the center. The authors obtained mechanical properties and fractographic parameters with testing and analyzing such various types of concrete specimens. The findings are as follows: 1. The nine fractographic parameters are closely related to each other reflecting the extent of crack paths and the depth of fracture process zone, though they have the different viewpoints with focusing on the extreme points (i.e., the height or its derivatives), the increase of the length or the area from the projected ones, or the local curvature. 2. The most consistent fractographic parameter to the mechanical properties is RS (the ratio of the fractured surface to the projected one) among the parameters analyzed in this study, which is considered to be the results of the extent of crack paths and the depth of fracture process zone. Other 8 parameters are closely related parameters to RS.

关键词： Concretes

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Human Preferences in Using Damping to Manage Singularities During Physical Human-Robot Collaboration

Human Preferences in Using Damping to Manage Singularities D...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Marc G. Carmichael Richardo Khonasty Stefano Aldini Dikai Liu Centre for Autonomous Systems (CAS) School of Mechanical and Mechatronic Engineering Faculty of Engineering and IT University of Technology Sydney Australia

ISBN: (数字)9781728173955

ISBN: (纸本)9781728173962

When a robot manipulator approaches a kinematic singular configuration, control strategies need to be employed to ensure safe and robust operation. If this manipulator is being controlled by a human through physical human-robot collaboration, the choice of strategy for handling singularities can have a significant effect on the feelings and impressions of the user. To date the preferences of humans during physical human-robot collaboration regarding strategies for managing kinematic singularities have yet to be thoroughly *** work presents an empirical study of a damping-based strategy for handling singularities with regard to the preferences of the human operator. Two different parameters, damping rate and damping asymmetry, are tested using a double-blind A/B pairwise comparison testing protocol. Participants included two cohorts made up of the general public (n=51) and people working within a robotic research centre (n=18). In total 105 individual trials were performed. Results indicate a preference for a faster, asymmetric damping behavior that slows motions towards singularities whilst allowing for faster motions away.

关键词： Damping Manipulators Collaboration Jacobian matrices Kinematics Collision avoidance

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Prewavy instability-originated dielectric chevrons of electroconvection in nematic liquid crystals

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Physical Review E 2020年第4期102卷 042704-042704页

作者： Masato Shiomi E-Joon Choi Jong-Hoon Huh Department of Physics and Information Technology Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka 820-8502 Japan Department of Polymer Science and Engineering Kumoh National Institute of Technology Gumi Gyungbuk 730-701 Korea

This paper reports the pattern formation and evolution in a high-frequency dielectric regime observed in the AC-driven electroconvection of nematic liquid crystals (NLCs). It is determined that prewavy (PW) instability is essential for the formation and evolution. Specifically, in a twisted-aligned NLC cell, we observe a unique pattern that is comparable to the dielectric chevrons (DCVs) typically observed in a conventional planarly aligned pattern. It is determined to be a combined PW pattern with dielectric normal rolls (DNRs). Moreover, the power indices (αPW, αDNR, and αDCV) are determined from the frequency-dependent thresholds (Vth∝fα) of PW, DNR, and DCV. By taking into account the appearance of PW and the different power indices, the pattern evolution scenarios for DCV are proposed, which can well explain the previous experimental results. Specifically, the PW-originated DCV2 clearly differs from the defect-mediated DCV1, which is known as a typical pattern evolution.

关键词： Pattern formation

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Hilbert's space-filling curve for regions with holes

Hilbert's space-filling curve for regions with holes

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IEEE Annual Conference on Decision and Control

作者： Siddharth H. Nair Arpita Sinha Leena Vachhani Department of Aerospace Engineering Indian Institute of Technology Bombay India Faculty of Systems and Control Engineering Indian Institute of Technology Bombay India

The paper presents a systematic strategy for implementing Hilbert's space filling curve for use in online exploration tasks and addresses its application in scenarios wherein the space to be searched obstacles (or holes) whose locations are not known a priori. Using the self-similarity and locality preserving properties of Hilbert's space filling curve, a set of evasive maneuvers are prescribed and characterized for online implementation. Application of these maneuvers in the case of non-uniform coverage of spaces and for obstacles of varying sizes is also presented. The results are validated with representative simulations demonstrating the deployment of the approach.

关键词： Robot sensing systems Robot kinematics Aerospace electronics Manifolds Planning

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Improving Dynamic Security of the Least Significant Bit Using Block-Based Chaotic Multi-level LSB (BCM-LSB) 1

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9th International Conference on Cyber Security, Privacy in Communication Networks, ICCS 2023

作者： Azam, Muhammad Harith Noor Ridzuan, Farida Norazizi Sham Mohd Sayuti, M. Azni, A.H. Zakaria, Nur Hafiza Harjito, Bambang Faculty of Science and Technology Universiti Sains Islam Malaysia Nilai Malaysia Cybersecurity and Systems Research Unit Faculty of Science and Technology Universiti Sains Islam Malaysia Nilai Malaysia Faculty of Engineering and Built Environment Universiti Sains Islam Malaysia Nilai Malaysia Department of Informatics Universitas Sebelas Maret Jl. Ir. Sutami 36A Kentingan Surakarta Indonesia

ISBN: (数字)9789819739738

ISBN: (纸本)9789819739721

Least Significant Bit (LSB) embedding is one of the most common techniques used in audio steganography. LSB audio steganographic techniques have poor dynamic security and are vulnerable to visual and statistical attacks. Therefore, secret information should be disseminated throughout the cover audio to withstand these attacks. To solve this issue, the Block-based Chaotic Multi-level Least Significant Bit (BCM-LSB), which comprises two elements: block generator and rounding mechanism, is proposed. The block generator controls the size and quantity of the block, along with the initial embedding point of the secret information based on a set of stego-keys. In addition, the rounding mechanism ensures that any incomplete embedding process within a block is carried forward to the start of the same block to maximise the BCM-LSB capacity. The proposed method achieves an even distribution of the secret information across the cover audio by utilising these two elements. The results indicate that the BCM-LSB achieved the research objective while maintaining the audio steganography capacity, imperceptibility, and robustness. The segmental SNR (seg-SNR) test indicated that the BCM-LSB avoided graph spikes compared to existing methods. Moreover, the BCM-LSB distributed the error fairly throughout the stego-file compared to other existing methods. The BCM-LSB achieved high dynamic security as all variations successfully distributed the secret information throughout the cover audio. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Signal to noise ratio

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Mist chemical vapor deposition study of 20 and 100 nm thick undoped ferroelectric hafnium oxide films on n+-Si(100) substrates

Mist chemical vapor deposition study of 20 and 100 nm thick ...

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作者： Tahara, Daisuke Nishinaka, Hiroyuki Sato, Shota Li, Liu Kawaharamura, Toshiyuki Yoshimoto, Masahiro Noda, Minoru Department of Electronics Kyoto Institute of Technology Kyoto606-8585 Japan Faculty of Electrical Engineering and Electronics Kyoto Institute of Technology Kyoto606-8585 Japan School of Systems Engineering Kochi University of Technology Kami Kochi782-8502 Japan Graduate School of Engineering Kochi University of Technology 185 Miyanokuchi Tosayamada Kochi782-8502 Japan Center for Nanotechnology Research Institute Kochi University of Technology 185 Miyanokuchi Tosayamada Kochi782-8502 Japan

This study effectively synthesized ferroelectric undoped ferroelectric-phase hafnium oxide (HfO2) thin films on n+-Si(100) substrates without the need of any post-annealing for crystallization using mist chemical vapor deposition (CVD) techniques. Metal-ferroelectric highly doped n+-Si stacked capacitors exhibited ferroelectric polarization-electric field hysteresis at 1 kHz owing to the ferroelectric-phase HfO2 with remnant polarization and coercive field values of approximately 7 μC cm-2 and 1.4 MV cm-1, respectively. The resultant endurance cycle reached 1 × 109 after imposing fatigue pulses of 3 MV cm-1, which is an excellent value reported so far. These ferroelectric properties were related to the surface morphology and density of the films, compared to the post-annealed ones. A clear microcrystalline structure in the as-deposited films suggested the formation of intermediate chemical compounds containing carbon. On the contrary, the ferroelectricity was lost by post-anneal enhancing crystallization, especially for paraelectric monoclinic phase. Finally, we expect that the mist CVD HfO2 films will be promising in developing a key technology for Si-based ferroelectric LSIs. © 2019 The Japan Society of Applied Physics.

关键词： Chemical vapor deposition

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A case study of requirements elicitation process with changes

A case study of requirements elicitation process with change...

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作者： Nakatani, Takako Hori, Shouzo Ubayashi, Naoyasu Katamine, Keiichi Hashimoto, Masaaki Graduate School of Systems Management University of Tsukuba Tokyo 112-0012 Japan Quality Assurance Dept. Yaskawa Information Systems Corporation Kawasaki-shi 215-0004 Japan Faculty of Information Science and Electrical Engineering Kyushu University Fukuoka-shi 819-0395 Japan Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka-shi 820-8502 Japan

Requirements changes sometimes cause a project to fail. A lot of projects now follow incremental development processes so that new requirements and requirements changes can be incorporated as soon as possible. These processes are called integrated requirements processes, which function to integrate requirements processes with other developmental processes. We have quantitatively and qualitatively investigated the requirements processes of a specific project from beginning to end. Our focus is to clarify the types of necessary requirements based on the components contained within a certain portion of the software architecture. Further, each type reveals its typical requirements processes through its own rationale. This case study is a system to manage the orders and services of a restaurant. In this paper, we introduce the case and categorize its requirements processes based on the components of the system and the qualitative characteristics of ISO-9126. We could identify seven categories of the typical requirements process to be managed and/or controlled. Each category reveals its typical requirements processes and their characteristics. The case study is our first step of practical integrated requirements engineering. Copyright © 2010 The Institute of Electronics, Information and Communication Engineers.

关键词： Requirements engineering

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Speed Profile Optimization for Autonomous Electric Bus in Urban Area: Based on Service Route Parameter in Thailand

Speed Profile Optimization for Autonomous Electric Bus in Ur...

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Conference on Power, Energy and Innovations (ICPEI)

作者： Guntinan Sakulphaisan Sirirat Son-In Nitikorn Junhuathon Theerapol Muankhaw Industrial technology and innovation management Faculty of science and technology Pathumwan institute of technology Bangkok Thailand Electrical Engineering and Automation Control Systems Faculty of engineering and industrial technology Bansomdejchaopraya Rajabhat University Bangkok Thailand Department of Electrical Engineering Faculty of Engineering Rajamangala University of Technology Thanyaburi Pathumthani Thailand

This study conducts a comprehensive analysis of optimizing the speed profile of an AE-bus, a critical step in enhancing its operational efficiency. It encompasses three distinct case studies, each targeting specific objectives. The first case emphasizes energy consumption reduction, contributing to overall resource efficiency. The second focuses on eco-conscious speed profiles within predefined travel durations, balancing environmental sustainability and timeliness. The third case prioritizes travel time minimization for streamlined efficiency. Detailed insights into speed adjustments, bus positions, and energy consumption patterns are provided for each case. The findings reveal tailored approaches for energy conservation, speed, and travel time optimization. Additionally, emissions analysis demonstrates that electric buses significantly reduce CO 2 emissions compared to conventional NGV buses, showcasing their potential for environmental benefits.

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