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17th IEEE International Conference on Computer Research and Development, ICCRD 2025

作者： Du, Hongyi Li, Jiacheng Li, Lei Hosei University Graduate School of Science and Engineering Tokyo184-8584 Japan Kanagawa University Department of Applied Systems and Mathematics Yokohama Japan Hosei University Faculty of Science and Engineering Tokyo184-8584 Japan

ISBN: (纸本)9798331531881

The Genetic Algorithm (GA) has been successfully applied to the Capacitated Vehicle Routing Problem (CVRP), a classic NP-hard combinatorial optimization problem. The complexity of CVRP renders exact methods nearly infeasible, necessitating heuristic and metaheuristic approaches. GA is a widely used metaheuristic approach for obtaining near-optimal solutions, with the crossover operator playing a critical role in the algorithm's optimization effectiveness and efficiency. Although the Sequential Constructive Crossover (SCX) is one of the most effective crossover operators, it has the drawback of easily getting trapped in local optima. Given the limited research on improvements to SCX, this paper addresses this gap by proposing a Staged Crossover Strategy that Staged Sequential Constructive Crossover (SSCX) from a new perspective. This strategy introduces new individuals to enhance diversity, aiming to overcome the limitations of SCX. Extensive experiments on VRP instances of varying scales demonstrate that the improved algorithm significantly enhances optimization performance for large-scale CVRP instances, achieving an average improvement of approximately 5-18%. © 2025 IEEE.

关键词： Genetic algorithms

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Comparative Study of Fresh Produce Supply Chain Models Under Contract Farming and Cooperative Markets

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Journal of advanced Computational Intelligence and Intelligent Informatics 2025年第3期29卷 480-488页

作者： Huang, Yameng Hasuike, Takashi Graduate School of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku-ku Tokyo169-8555 Japan Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku-ku Tokyo169-8555 Japan Department of Industrial and Management Systems Engineering Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku-ku Tokyo169-8555 Japan

Smallholders play a vital role in global agriculture but face challenges such as resource limitations and market uncertainties. Contract farming (CF) and cooperative markets provide opportunities to smallholders to address these challenges. In this context, this study develops mathematical planning models for fresh produce supply chains (FPSCs) in two scenarios involving CF and cooperative markets with the objective of maximizing profits of smallholders. Results of computational experiments and sensitivity analysis reveal that CF has greater potential than cooperative markets to mitigate price volatility, thereby offering a stable income source to smallholders. This study provides valuable insights into CF and cooperative market practices, contributing to the sustainability of FPSCs and improving smallholders’ livelihoods. © Fuji Technology Press Ltd.

关键词： Heuristic algorithms

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Development of a Deep Sea Remote Experiment System for Visualizing Methane Bubbles Behavior in Hydrate Environment

Development of a Deep Sea Remote Experiment System for Visua...

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2025 IEEE Underwater Technology, UT 2025

作者： Oda, Jumpei Kondo, Hayato Kobayashi, Shukichi Aoyama, Chiharu Graduate School of Marine Science and Technology Tokyo University of Marine Science and Technology Tokyo Japan Tokyo University of Marine Science and Technology Department of Maritime Systems Engineering Tokyo Japan Tokyo University of Marine Science and Technology Tokyo Japan

ISBN: (纸本)9798331534189

As part of the research and development of shallow methane hydrate recovery and production technologies for deep-sea environments, the potential use of membrane structures for capturing methane seeps while mining and for pollution prevention to reduce environmental impact of mining has been investigated. In our previous study, we developed a visualization system that replicates the methane hydrate environment on the seafloor in a laboratory setting. This system has been utilized to conduct numerous laboratory experiments, providing insights into the behavior of methane bubbles with a hydrate film on their surface. These bubbles differ from conventional methane bubbles in their interaction with various membrane materials. The pure water is utilized in these experiments to eliminate the impact of complex variables present in sea water, such as dissolved gases, ions, and particles. To validate the applicability of the obtained characteristics to the actual sea environment, comparison tests should be conducted in the deep sea, where methane hydrate exists. In this study, we have developed a deep sea remote experiment system that has capabilities to execute analogous tests in situ within a deep sea environment. The design of the system and some results obtained at depths of approximately 1000 meters are presented in this paper. © 2025 IEEE.

关键词： Deep sea mining

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Experimental Construction of Mohr–Coulomb Model for Green Sand Mold by Direct Shear Test Eliminating Effect of Wall Friction

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International Journal of Metalcasting 2025年 1-11页

作者： Okimura, Yasuhiko Kumaki, Takumi Yoshida, Hideki Nishi, Kohei Kato, Noriyuki Tokunaga, Koji Hashimoto, Kunihiro Matsuura, Makoto Koroyasu, Sadatoshi Komine, Hideo Maeda, Yasuhiro Okane, Toshimitsu Miyashita, Tomoyuki Yoshida, Makoto Department of Modern Mechanical Engineering Graduate School of Creative Science and Engineering Waseda University Tokyo Shinjuku169-8555 Japan SINTOKOGIO Ltd Aichi Nagoya450-6424 Japan Faculty of Science and Engineering Department of Mechanical and Precision Systems Teikyo University Tochigi Utsunomiya320-8551 Japan Department of Civil and Environmental Engineering School of Creative Science and Engineering Waseda University Tokyo Shinjuku169-8555 Japan Department of Mechanical Engineering School of Engineering Daido University Aichi Nagoya457-8530 Japan Faculty of Technologists Department of Manufacturing Technologists Institute of Technologists Saitama Gyoda361-0038 Japan Department of Modern Mechanical Engineering School of Creative Science and Engineering Waseda University Tokyo Shinjuku169-8555 Japan Kagami Memorial Research Institute for Materials Science and Technology Waseda University Tokyo Shinjuku169-0051 Japan Tajima Light Metal Co. Ltd. Saitama Hanyu Japan

This paper performed the direct shear test for a green sand mold to construct the Mohr–Coulomb (MC) model as a mechanical model of the green sand mold, which is essential to predict the casting deformation by computer simulation. It is generally known that the pressure loaded on the test piece is not fully transmitted to its shear plane in the direct shear test because of the friction between the test piece and the shear box. A previous study estimated the vertical stress on the shear plane from the pressure transmission coefficient measured when the test piece was not sheared. However, this method ignored the change in the value and direction of the wall friction due to the dilatancy of the test piece during shearing. The present paper determines the values of the material constants in the MC model by two methods: by eliminating the effect of the wall friction during shearing and by ignoring that effect. In the prior method, the vertical stress on the shear plane is directly measured throughout the test by the load cell attached below the test piece. As a result, when the wall friction effect during shearing is not eliminated, the strength of the test piece was evaluated to be twice as large as that obtained eliminating the wall friction effect. With the MC model ignoring the wall friction, the computer simulation to predict the casting deformation will estimate the unrealistically high strength of the mold, leading to an erroneous prediction of the casting deformation. © The Author(s) 2025.

关键词： Bulk Density

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Influence of Exposure Time and Driving Frequency on Cytotoxicity in In Vitro Ultrasound With Constant Mechanical Indices

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engineering in Life sciences 2025年第5期25卷 e70011页

作者： Oyama, Taigo Imashiro, Chikahiro Kurashina, Yuta Ando, Keita Takemura, Kenjiro School of Science for Open and Environmental Systems Graduate School of Science and Technology Keio University Yokohama Japan Department of Mechanical Engineering Keio University Yokohama Japan School of Engineering The University of Tokyo Tokyo Japan Division of Advanced Mechanical Systems Engineering Institute of Engineering Tokyo University of Agriculture and Technology Tokyo Japan

Sonochemistry has become increasingly important in bioengineering research, and many in vitro and in vivo bioapplications have been developed. Cytotoxicity is always a concern in its implementation. For in vivo treatments and studies, mechanical index (MI) is known to ensure biocompatibility, and even in vitro MI has been used. Because cell characteristics and acoustic phenomena differ in vitro and in vivo, we questioned using MI in vitro. The in vitro cytotoxicity of ultrasound exposure should be investigated to support the development of cutting-edge sonochemistry. In this study, a system for irradiating cultured cells with 1–2 MHz-range ultrasound was developed to demonstrate the invalidity of employing MI alone in vitro. The results showed that cell damage is defined by the MI, ultrasound frequency, and exposure time, which are new indices for quantifying cell damage. Furthermore, cavitation and acoustic streaming are shown to be the main scientific factors that injure cells. © 2025 The Author(s). engineering in Life sciences published by Wiley-VCH GmbH.

关键词： Sonochemistry

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Artificial Finger Consisting of Closed Linkages and a Single Planetary Gear System: control of a Reaction Force Vector Yielded at a Fingertip

Artificial Finger Consisting of Closed Linkages and a Single...

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2025 IEEE/SICE International Symposium on System Integration, SII 2025

作者： Eto, Y. Koganezawa, K. Kai, Y. Tokai University Graduate School of Science and Technology 4-1-1 Kitakaname Hiratsuka259-1292 Japan Tokai University Japan Tokai University Department of Mechanical Systems Engineering Japan

ISBN: (纸本)9798331531614

The authors have developed a five-finger robot hand with artificial fingers consisting of closed linkages and a Single Planetary Gear System. Recently, we developed a new finger mechanism equipping a hyperextension joint at the fingertip that acts passively by two torsion springs. This paper aims to investigate how the hyperextension joint allows to control the reaction force vector that the fingertip applies to an external object in kinematic & kinetic theoretical point of view. © 2025 IEEE.

关键词： Epicyclic gears

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Predictive Vehicle control at Intersections with Look-Ahead Driving Approach

Predictive Vehicle Control at Intersections with Look-Ahead ...

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SICE International Symposium on control systems (ISCS)

作者： Atykhan Magzhan Md Delowar Hossain A. S. M. Bakibillah Md Abdus Samad Kamal Kou Yamada Graduate School of Science and Technology Gunma University Kiryu Japan Department of Systems and Control Engineering Institute of Science Tokyo Tokyo Japan

ISBN: (数字)9784907764852

ISBN: (纸本)9798331533502

This paper presents a look-ahead vehicle control scheme for efficient traffic management at signalized inter-sections. The proposed scheme predicts future driving states with a look-ahead approach as an extended adaptive cruise control (ACC) model. It maintains car-following behavior similar to human driving while predicting future states of traffic flow to minimize intersection clearing time and aggressive braking independently, similar to model predictive control (MPC) approaches. In contrast to MPC models that are computationally demanding and have limited practical applications due to real-time constraints, the proposed scheme uses a modified Intelligent Driver Model (IDM) with predictive adjustments. The efficiency of the control scheme is evaluated through simulations with multiple vehicles in intersection traffic scenarios, focusing on maintaining safe time headway within a traffic flow and ensuring efficient flows with higher intersection throughput. Comparative results indicate improvements in intersection clearance, human-like vehicle headway management, and enhanced traffic flow performance.

关键词： Adaptation models Computational modeling Heuristic algorithms Predictive models Prediction algorithms Real-time systems Safety Vehicle dynamics Predictive control Vehicles

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Image Integrity Analysis under Defense Approaches Against Adversarial Patches

Image Integrity Analysis under Defense Approaches Against Ad...

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2025 International Workshop on advanced Imaging Technology, IWAIT 2025

作者： Siritanawan, Prarinya Chunhachatchawhankhun, Kasidit Kotani, Kazunori Graduate School of Science and Technology Department of Engineering Informatics and Interdisciplinary Systems Division Shinshu University Nagano Japan Division of Transdisciplinary Science JAIST Ishikawa Japan Faculty of Transdisciplinary Science Institute of Philosophy in Interdisciplinary Science Kanazawa University Ishikawa Japan

ISBN: (数字)9781510688131

ISBN: (纸本)9781510688124

Adversarial patches pose a significant threat to image recognition systems, exploiting small, maliciously crafted patterns to mislead models into incorrect *** traditional adversarial examples, adversarial patches operate under real-world constraints, making defense against them a challenging *** study introduces an alternative defense strategy that employs partial masking to mitigate the impact of adversarial patches without relying on precise patch *** global masking patterns were evaluated to determine the best balance between adversarial robustness and image *** proposed method effectively reduces attack success rates while maintaining reasonable classification accuracy, demonstrating its potential to ensure protection in real-world applications without dependency on the detection methods. © 2024 SPIE.

关键词： Defense and security Image classification Image restoration Image analysis Visualization Image processing Data modeling systems modeling

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Effect of shape of single-roll rapid solidification nozzles on properties of ribbons for magnesium rechargeable batteries

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Keikinzoku/Journal of Japan Institute of Light Metals 2025年第2期75卷 114-119页

作者： Kirimoto, Yuichi Tsukeda, Tadayoshi Aida, Tetsuo Tabata, Hironobu Haga, Toshio Kurihara, Hideki Suzuki, Mayumi Department of Nano and Functional Material Science Graduate School of Science and Engineering for Education University of Toyama 3190 Gofuku Toyama Toyama-shi930-8555 Japan Faculty of Sustainable Design Academic Assembly University of Toyama Toyama Toyama-shi Japan CHUETSU METAL WORKS CO. LTD. Nakaniikawa-gun Toyama Japan Department of Mechanical Engineering Osaka Institute of Technology Osaka Osaka-shi Japan Saitama Industrial Technology Center Saitama Saitama-shi Japan Department of Mechanical Systems Engineering Faculty of Engineering Toyama Prefectural University Toyama Imizu-shi Japan

In developing ribbons for use as anode materials in innovative rechargeable batteries, magnesium ribbons were manufactured using a single-roll rapid solidification method. The quality of ribbons, such as their surface characteristics and defects, was considered to be largely determined by the manufacturing conditions of single-roll rapid solidification method, and it was also reported that shape of nozzle used to spray molten magnesium also had a significant effect on the quality of ribbons. In this study, ribbons were produced using nozzles with various internal gradient angles, and the surface properties, cross-sectional structure, and internal and external defects of the ribbons were evaluated. In actual ribbon production, it was confirmed that a nozzle with a smaller gradient angle could produce ribbons with a stable yield of over 70%. This is because adding a gradient shape allows smooth molten metal to be sprayed out. In the microstructure observation of the ribbons, a network-like second phase was observed near the free-solidification surface. A difference in cell size was also confirmed with the change in nozzle shape. In addition, the relationship between cell size and hardness was investigated, and it was confirmed that the hardness value decreases as the cell size increases. © 2025 The Japan Institute of Light Metals.

关键词： Hardness

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Secure-by-Construction Synthesis for control systems

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IEEE Transactions on Automatic control 2025年第6期70卷 4170-4177页

作者： Zhong, Bingzhuo Liu, Siyuan Caccamo, Marco Zamani, Majid Thrust of Artificial Intelligence Information Hub The Thrust of Intelligent Transportation System Hub China KTH Royal Institute of Technology Division of Decision and Control Systems Stockholm Sweden Technical University of Munich TUM School of Engineering and Design Germany University of Colorado Boulder Department of Computer Science United States Ludwig Maximilian University Department of Computer Science Munich Germany

In this note, we present the synthesis of secure-by-construction controllers that address safety and security properties simultaneously in cyber-physical systems. Our focus is on studying a specific security property called opacity, which characterizes the system's ability to maintain plausible deniability of its secret behavior in the presence of an intruder. These controllers are synthesized based on a concept of so-called (augmented) control barrier functions. We propose conditions that facilitate the construction of the desired (augmented) control barrier functions and their corresponding secure-by-construction controllers. To compute these functions, we propose an iterative scheme that leverages iterative sum-of-square programming techniques. This approach enables efficient computation of these functions, particularly for polynomial systems. Finally, we validate the effectiveness of our results through a case study of a vehicle. © 1963-2012 IEEE.

关键词： Iterative methods

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