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25th International Conference on Pattern Recognition Workshops, ICPR 2020

作者： Kim, Wonjik Tanaka, Masayuki Okutomi, Masatoshi Sasaki, Yoko Department of Systems and Control Engineering School of Engineering Tokyo Institute of Technology Meguto-ku Tokyo152-8550 Japan Artificial Intelligence Research Center National Institute of Advanced Industrial Science and Technology Koto-ku Tokyo135-0064 Japan

ISBN: (纸本)9783030687861

Future frame prediction in videos is a challenging problem because videos include complicated movements and large appearance changes. Learning-based future frame prediction approaches have been proposed in kinds of literature. A common limitation of the existing learning-based approaches is a mismatch of training data and test data. In the future frame prediction task, we can obtain the ground truth data by just waiting for a few frames. It means we can update the prediction model online in the test phase. Then, we propose an adaptive update framework for the future frame prediction task. The proposed adaptive updating framework consists of a pre-trained prediction network, a continuous-updating prediction network, and a weight estimation network. We also show that our pre-trained prediction model achieves comparable performance to the existing state-of-the-art approaches. We demonstrate that our approach outperforms existing methods especially for dynamically changing scenes. © 2021, Springer Nature Switzerland AG.

关键词： Forecasting

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Urban Damage Detection Using Temporally Stacked Synthetic Aperture Radar Interferometric Coherence

Urban Damage Detection Using Temporally Stacked Synthetic Ap...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Ryo Natsuaki Ryu Sugimoto Masanobu Shimada Chiaki Tsutsumi Ryosuke Nakamura Department of Electrical Engineering and Information Systems The University of Tokyo Japan Digital Architecture Research Center National Institute of Advanced Industrial Science and Technology Japan Division of Architectural Civil and Environmental Engineering Tokyo Denki University Japan

In this paper, we propose a novel disaster damage detection method using Synthetic Aperture Radar (SAR) interferometric analysis. SAR interferometric coherence analysis is an effective method for disaster monitoring especially in the urban area, where the amplitude of SAR image changes only slightly unless the damage level is high. One drawback of the interferometric coherence-based analysis is the existence of the Cramér-Rao lower bound. That is, a small spatial window for its ensemble averaging leads significant bias while a large window makes its spatial resolution worse. To solve this problem, we propose to extend the ensemble average window towards temporal domain by increasing the number of interferometric pairs. Conventional methods which use multiple interferometric pairs firstly calculate coherence values independently. Instead, the proposed method unifies the interferograms first. We report some preliminary experimental results showing the effectiveness of the proposed method.

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Development of a VS ultrasound diagnostic system with image evaluation functions 11

Development of a VS ultrasound diagnostic system with image ...

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11th IEEE Global Conference on Consumer Electronics, GCCE 2022

作者： Zhou, Jiayi Koizumi, Norihiro Nishiyama, Yu Tsumura, Ryosuke Tsukihara, Hiroyuki Matsumoto, Naoki The University of Electro-Communications Department of Mechanical and Intelligent Systems Tokyo Japan The University of Electro-Communications Department of Computer and Network Engineering Tokyo Japan Health and Medical Research Institute National Institute of Advanced Industrial Science and Technology Tokyo Japan The University of Tokyo Graduate School of Engineering Tokyo Japan Nihon University Department of Gastroenterology and Hepatology Tokyo Japan

ISBN: (纸本)9781665492324

An inevitable feature of ultrasound-based diagnoses is that the quality of the ultrasound images produced depends directly on the skill of the physician operating the probe. This is because physicians have to constantly adjust the probe position to obtain a cross-section of the target organ, which is constantly shifting due to patient respiratory motions. Therefore, we developed an ultrasound diagnostic robot that works in cooperation with a visual servo system based on deep learning that will help alleviate the burdens imposed on physicians. Two different image processing methods (BiSeNet V2) were used to detect the target kidney location, as well as to evaluate the appropriateness of the obtained ultrasound images (ResNet 50) in developed system. © 2022 IEEE.

关键词： Visual servoing

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Record-low Loss Non-volatile Mid-infrared PCM Optical Phase Shifter based on Ge2 Sb2 Te3 S2

Record-low Loss Non-volatile Mid-infrared PCM Optical Phase ...

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International Electron Devices Meeting (IEDM)

作者： Yuto Miyatake Kotaro Makino Junji Tominaga Noriyuki Miyata Takashi Nakano Makoto Okano Kasidit Toprasertpong Shinich Takagi Mitsuru Takenaka Department of Electrical Engineering and Information Systems The University of Tokyo Tokyo Japan National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Japan

ISBN: (纸本)9781665489607

We propose a low-loss non-volatile phase change material (PCM) phase shifter operating at mid-infrared wavelengths using Ge 2 Sb 2 Te 3 S 2 (GSTS), a new selenium-free widegap PCM. The Si waveguide with GSTS exhibited the record-low optical loss for $\pi$ phase shift of $0.29\text{dB}/\pi$, more than 20 times better than the PCM phase shifters reported so far in terms of figure-of-merit, defined by $\Delta n/\kappa_{c}$, where $\Delta n$ and $\kappa_{\text{c}}$ are the change in the refractive index and the extinction coefficient of the crystalline PCM, respectively. A GSTS phase shifter, enabled by our approach to use a wider bandgap PCM at a longer operating wavelength, is one of the solutions to realize a low-loss phase shifter for quantum photonic integrated circuits.

关键词： Phase change materials Optical losses Waveguide transitions Optical recording Phase shifters Photonic integrated circuits Optical variables control

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Efficiently Collecting Training Dataset for 2D Object Detection by Online Visual Feedback

arXiv

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arXiv 2023年

作者： Kiyokawa, Takuya Shirakura, Naoki Katayama, Hiroki Tomochika, Keita Takamatsu, Jun Department of Systems Innovation Graduate School of Engineering Science Osaka University Osaka Toyonaka Japan National Institute of Advanced Industrial Science and Technology Aomi Koto-ku Tokyo Japan Nara Ikoma Japan

Training deep-learning-based vision systems require the manual annotation of a significant number of images. Such manual annotation is highly time-consuming and labor-intensive. Although previous studies have attempted to eliminate the effort required for annotation, the effort required for image collection was retained. To address this, we propose a human-in-the-loop dataset collection method that uses a web application. To counterbalance the workload and performance by encouraging the collection of multi-view object image datasets in an enjoyable manner, thereby amplifying motivation, we propose three types of online visual feedback features to track the progress of the collection status. Our experiments thoroughly investigated the impact of each feature on collection performance and quality of operation. The results suggested the feasibility of annotation and object detection. Copyright © 2023, The Authors. All rights reserved.

关键词： Visual servoing

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Effect of Driver-Initiated Control Transition During Scheduled Take-Overs with Recommendations on Take-Over Time and Vehicle Control Performance

SSRN

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SSRN 2024年

作者： Saito, Yuichi Ichinose, Yusaku Sato, Toshihisa Itoh, Makoto Institute of Systems and Information Engineering University of Tsukuba Ibaraki Tsukuba305-8573 Japan Center for Artificial Intelligence Research University of Tsukuba Ibaraki Tsukuba305-8573 Japan Degree Programs of Systems and Information Engineering University of Tsukuba Ibaraki Tsukuba305-8573 Japan The National Institute of Advanced Industrial Science and Technology Ibaraki Tsukuba305-8560 Japan Graduate School of Systems and Information Engineering Japan

In conditional driving automation, which allows drivers to be engaged in nondriving activities, a control transition from automation to the driver is required when automation cannot handle the situation safely. Considerable research has been conducted on automation-initiated driver-control strategies that restore drivers to the control loop. However, there is a lack of research on achieving driver-initiated driver control (DIDC) transitions, where drivers deactivate the automated driving mode at their initiative and pace prior to a take-over request. This study proposes a DIDC strategy with a take-over recommendation rather than a request for action selection: ``I recommend that you deactivate the automated driving mode.'' We investigated the effect of the proposed DIDC strategy on the take-over time and vehicle control performance in scheduled take-overs. A scheduled take-over scenario (i.e., approaching a traffic accident site) was designed with a driving simulator. We explored message contents that could achieve DIDC transition: 1) no situational message, 2) situational message, 3) situational message with a monitoring request, and 4) situational message with a take-over recommendation. Thirty nine drivers participated in our driving simulation experiment for a 21-min drive on a highway. This study found that with the take-over recommendation, the drivers stayed longer with their hands on the steering wheel, focused on the road ahead, and deactivated the automated driving mode by themselves. When achieving DIDC transition, the vehicle control performance was safer in avoiding obstacles. The proposed take-over recommendation system is helpful for drivers to deactivate automated driving modes at their initiative and pace. However, this strategy did not necessarily result in DIDC transition. One challenge is designing escalation steps that accelerate the formation of human–automation intentions to deactivate the automated driving mode at their initiative and pace. ©

关键词： Automation

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Non-Orthogonal Multiple Access Based Multi-Objective Optimization in Emergency Task Offloading

Non-Orthogonal Multiple Access Based Multi-Objective Optimiz...

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IEEE Conference on Wireless Communications and Networking

作者： Caijuan Chen Chaofeng Zhang Gaolei Li Yuchen Liu The Information Systems Architecture Science Research Division National Institute of Informatics Tokyo Japan Advanced Institute of Industrial Technology Tokyo Japan School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China Department of Computer Science NC State University North Carolina US

ISBN: (数字)9798350368369

ISBN: (纸本)9798350368376

The escalating frequency of geological disasters, local conflicts, and public health crises necessitates robust emergency communication systems within Internet of Things (IoT) frameworks to ensure public safety. Employing Power-Domain NOMA (PD-NOMA) and Successive Interference Cancellation (SIC) enables effective multi-device communication that is crucial for emergency responses. However, the practical implementation of NOMA technologies in emergency scenarios is hindered by existing resource constraints and the requirement of prioritizing critical emergency information. To address these limitations, we propose a multi-objective optimization-based NOMA framework to maximize network throughput while ensuring quality of service (QoS) and energy efficiency. This framework incorporates a novel communication grouping algorithm based on queue penalty optimization and an Actor-Critic-based dynamic updating algorithm for multiple resource allocation. Our study proposes a practical approach to enhance emergency communication in disaster areas, ensuring efficient and reliable network performance under various constraints.

关键词： NOMA Interference cancellation Heuristic algorithms Disasters Quality of service Throughput Dynamic scheduling Internet of Things Resource management Optimization

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Non-Orthogonal Multiple Access Based Multi-Objective Optimization in Emergency Task Offloading

Non-Orthogonal Multiple Access Based Multi-Objective Optimiz...

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2025 IEEE Wireless Communications and Networking Conference, WCNC 2025

作者： Chen, Caijuan Zhang, Chaofeng Li, Gaolei Liu, Yuchen National Institute of Informatics The Information Systems Architecture Science Research Division Tokyo Japan Advanced Institute of Industrial Technology Tokyo Japan School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China Nc State University Department of Computer Science NC United States

ISBN: (纸本)9798350368369

关键词： Multiobjective optimization

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Development of a Passive Mechanism for Transfemoral Prosthetic Knee to Assist Sitting-Down on/Stand-Up from a Chair

Development of a Passive Mechanism for Transfemoral Prosthet...

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SICE Annual Conference

作者： Shuji Sakoda Mai Murabayashi Takuya Mitani Koh Inoue Graduate School of Science for Creative Emergence Kagawa University Kagawa Japan Graduate School of Engineering Kagawa University Kagawa Japan Are of Mechanical Systems Engineering Kagawa University Takamatsu Japan Department of Life Science and Biotechnology Health and Medical Research Institute National Institute of Advanced Industrial Science and Technology (AIST) Takamatsu Japan

ISBN: (数字)9784907764838

ISBN: (纸本)9798331544461

Sitting down and standing up from a chair are essential daily activities. However, existing prosthetic knees often lack sufficient functionality to perform these motions, particularly when standing up. Consequently, unilateral transfemoral prosthetic users must rely more on their sound limb for these motions, which can potentially lead to injury or joint disease due to the increased load on the joints of the intact side. The present study aimed to develop a prosthetic knee mechanism that assists in sitting down and standing up from a chair. We proposed a new passive mechanism integrated into our previous prosthetic knee design. This mechanism stores mechanical energy in a spring during knee flexion when sitting down, providing flexion resistance. The stored energy is then released by the user's manipulation, assisting in knee extension. In the evaluation experiment, a subject equipped with a simulated thigh socket and the proposed prosthetic knee performed the motions of sitting down and standing up from a chair. The results demonstrated a higher symmetry index of the ground reaction force during these motions with the proposed mechanism compared to the literature, suggesting that the mechanism functioned appropriately. The proposed mechanism can be applied to other prosthetic knees, potentially allowing transfemoral amputees to gain the functionality for standing up without needing to replace their current prosthetic knee.

关键词： Resistance Limbs Sockets Force Thigh Iron Mechanical energy Springs Injuries Prosthetics

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A requirement analysis method for the design of the upgradable product-service system

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Procedia CIRP 2023年 119卷 402-407页

作者： Hanfei Wang Yuya Mitake Yusuke Tsutsui Salman Alfarisi Yoshiki Shimomura Faculty of Systems Design Tokyo Metropolitan University Asahigaoka 6-6 Hino-shi Tokyo 191-0065 Japan Human Augmentation Research Center National Institute of Advanced Industrial Science and Technology Chiba 277-0882 Japan Faculty of Computer Science and Systems Engineering Okayama Prefectural University Okayama 719-1197 Japan

For extending the life cycle of products and satisfying the further requirement of customers, product-service system (PSS), an integration of products and services is considered as a promising solution. However, for PSS design, customers’ expectations on the purchased product could be changed due to the development of technology and fashion. For this reason, the life of value might be exhausted before the real life of a product. Although there are some existing upgrade plans or maintenance plans for PSS design, it is found to be risky for PSS firms to provide the mentioned plans that are threatened by various uncertain events. Thus, to achieve an upgradable PSS, it is extremely essential to propose a method to identify the requirement for upgradability based on the perspective of customers. To achieve this aim, this paper has developed a method includes four steps. In step one, a set of definitions is provided to clarify the upgradability of PSS. In step 2, this study utilizes a PEST-OT matrix to analyze the driver of the future development. Step3 uses a persona-based explorative scenario building method to identify the characteristic of targeted customer and build a scenario of interaction between customer and PSS in a future scenario. Step 4 provides a requirement transformation method to transform the requirement into receiver state parameter (RSP). After that, the RSP is transformed into detailed product characteristics (PChs) and service characteristics (SChs). To verify the effectiveness, a case study of shared furniture is used. The result of the case study shows this method could work effectively in a Business-to-Customer business.

关键词： upgradable product-service system customer requirement analysis scenario building upgrade strategy

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