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arXiv 2021年

作者： Kung, Pou-Chun Wang, Chieh-Chih Lin, Wen-Chieh Graduate Degree Program of Robotics National Chiao Tung University Hsinchu Taiwan Department of Electrical and Computer Engineering National Chiao Tung University The Mechanical and Mechatronics Systems Research Laboratories Industrial Technology Research Institute Hsinchu Taiwan Department of Computer Science National Chiao Tung University Hsinchu Taiwan

Existing radar sensors can be classified into automotive and scanning radars. While most radar odometry (RO) methods are only designed for a specific type of radar, our RO method adapts to both scanning and automotive radars. Our RO is simple yet effective, where the pipeline consists of thresholding, probabilistic submap building, and an NDT-based radar scan matching. The proposed RO has been tested on two public radar datasets: the Oxford Radar RobotCar dataset and the nuScenes dataset, which provide scanning and automotive radar data respectively. The results show that our approach surpasses state-of-the-art RO using either automotive or scanning radar by reducing translational error by 51% and 30%, respectively, and rotational error by 17% and 29%, respectively. Besides, we show that our RO achieves centimeter-level accuracy as lidar odometry, and automotive and scanning RO have similar accuracy. Copyright © 2021, The Authors. All rights reserved.

关键词： Optical radar

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SURFACE SHIP COMBAT SYSTEM UPGRADE engineering

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NAVAL ENGINEERS JOURNAL 1988年第3期100卷 180-193页

作者： HOLDEN, RA The author is a physicist in the Systems Engineering Branch Aegis Ship Combat Systems Division at the Naval Surface Warfare Center (NSWC). He received a B.S. degree in physics and mathematics from Arkansas Polytechnic College in 1965 attended graduate school at Southern Illinois University and University of Illinois receiving a M.S. degree in physics in 1967. He was an electro optics engineer for Delco Electronics before joining NSWC in 1972. He worked as a physicist in naval weapons guidance and control technology from 1972 until joining the Aegis shipbuilding program in 1983. Currently he serves as a combat system engineering group leader supporting the Aegis Program Office (NSWC). In this position he is responsible for a task supporting the Aegis Project Office (PMS-400) for present and planned combat system R&D.

Construction of new ships is typically limited to a rate of two to five per year. The lead ship of a class requires several years for design and construction and follow-on ships are completed at the typical production rate. The total time period to complete a class of multimission surface combatants is fifteen to twenty years. As ships are constructed the combat system gradually falls behind in warfighting capability and may be changed piecemeal in an attempt to keep pace with the advancing threat. Piecemeal changes are costly and create a proliferation of equipments and configurations. An acquisition strategy is described which avoids the annual capability upgrades but provides introduction of state-of-the-art technology at preplanned points in the building program. This will insure maximum commonality and modernization. Defining preplanned combat system upgrades consists of engineering conceptual systems as a departure from real systems under development. For modern integrated combat systems such as Aegis this requires evaluating all changes in terms of total impact on the functional and physical characteristics of the system. This paper describes an approach which defines combat system configurations as baselines and periodically evaluates emerging technology to define new baseline configurations. The configurations defined in this manner insure maximum commonality among ships of the class and still maintains warfighting capability.

关键词： NAVAL VESSELS

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Ultrasound Stimulation Potentiates Management of Diabetic Hyperglycemia

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Ultrasound in Medicine and Biology 2023年第5期49卷 1259-1267页

作者： Chang, Chia-Hsuan Fan, Kang-Chih Cheng, Yuan-Pin Chen, Jung-Chih Chen, Gin-Shin Graduate Degree Program of the College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu City Taiwan Institute of Biomedical Engineering and Nanomedicine National Health Research Institutes Miaoli County Taiwan Division of Endocrinology and Metabolism Department of Internal Medicine National Taiwan University Hospital Hsinchu Branch Hsinchu City Taiwan Graduate Institute of Clinical Medicine College of Medicine National Taiwan University Taipei City Taiwan Electronic Systems Research Division National Chung-Shan Institute of Technology Taoyuan City Taiwan Institute of Biomedical Engineering National Yang Ming Chiao Tung University Hsinchu City Taiwan Department of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu City Taiwan Catholic Mercy Hospital Catholic Mercy Medical Foundation Hsinchu County Taiwan Medical Device Innovation & Translation Center National Yang Ming Chiao Tung University Hsinchu City Taiwan

Objective: Glucose homeostasis is the only way to manage diabetic progression as all medications used do not cure diabetes. This study was aimed at verifying the feasibility of lowering glucose with non-invasive ultrasonic stimulation. Methods: The ultrasonic device was homemade and controlled via a mobile application on the smartphone. Diabetes was induced in Sprague–Dawley rats through high-fat diets followed by streptozotocin injection. The treated acupoint CV12 was at the middle of the xiphoid and umbilicus of the diabetic rats. Parameters of ultrasonic stimulation were an operating frequency of 1 MHz, pulse repetition frequency of 15 Hz, duty cycle of 10% and sonication time of 30 min for a single treatment. Discussion: The diabetic rats exhibited a significant decrease of 11.5% ± 3.6% in blood glucose in 5 min of ultrasonic stimulation (p © 2023 World Federation for Ultrasound in Medicine & Biology

关键词： Glucose

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GNN-Based Point Cloud Maps Feature Extraction and Residual Feature Fusion for 3D Object Detection

GNN-Based Point Cloud Maps Feature Extraction and Residual F...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Wei-Hsiang Liao Chieh-Chih Wang Wen-Chieh Lin Graduate Degree Program of Artificial Intelligence National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Mechanical and Mechatronics Systems Research Laboratories Industrial Technology Research Institute Hsinchu Taiwan Institute of Multimedia Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan

LiDAR detection of long-range vehicles is challenging because very few and sparse points are measured in long distances and vehicles with similar shapes of targets could lead to false positives easily. To tackle these challenges, taking the environment information (HD maps) into account could be beneficial to predetermine where targets are more or less likely to appear. Compared with semantic maps, HD maps formed by point clouds provide much richer information from surrounding static objects and scenes. In this work, we construct a GNN-based feature extraction of point cloud maps to increase the receptive fields of learning map features. Our work is based on PVRCNN, the state-of-the-art LiDAR object detection method. With point-wise and voxel-wise features obtained from PVRCNN, residual feature fusion is proposed to fuse the features from PVRCNN and the map features from GNN. Our approach is evaluated on NuScenes dataset. It achieves a 24.78% average precision improvement for long-range objects at 40–50 meters, the farthest areas with ground truth annotation. Our approach also has a 4.22% reduction of false positives in the entire sensing areas.

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Seagoing aspects of large rocket technology

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Naval Engineers Journal 1965年第N 5期v 77卷 p787-792页

作者： Watson, N.E. The author received his B.S. degree in Mechanical Engineering from Illinois Institute of Technology and has a B.S. equivalent in Electrical Engineering obtained in Navy Ship and Air Electronic Schools including Shipboard Fire Control Gear Radar Sonar Air and Sea Navigational equipment. Mr. Watson's professional engineering experience encompasses 23 years of design development and project engineering of specialized materials handling equipment electrical and hydraulic controls automated machining equipment submarine nuclear power systems fire control systems and electronic and mechanical AGE for ballistic missile systems. He participated in the systems engineering and preliminary design of Thor Atlas Nike-Zeus Ballistic Missile Target Program and Minuteman Ballistic Missile Systems. He has participated in numerous advanced study programs for ballistic missile and space systems.

Article deals with use of water flotation for transportation and launch of large rocket vehicles and for downrange recovery of large boosters;it also discusses special types of ships necessary for offshore or sea launch, and servicing;comparison of operational methods is simplified by considering configuration of two-stage Sea Dragon, 1,000,000 lb-plus payload vehicle weighing 80,000,000 lb at liftoff and 3,900,000 lb dry;assembled rocket is 75 ft in diam and 500 ft long.

关键词： Rockets and missiles

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OUT-OF-PRODUCTION MICRO-ELECTRONICS - AN ACHILLES HEEL OF DEFENSE systems

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NAVAL ENGINEERS JOURNAL 1988年第5期100卷 69-72页

作者： MACKENZIE, CM WOOTTEN, R HOY, K NEELY, J KOSCO, D SMITH, W C. Malcolm Mackenzie:is the Materials and Parts Availability Control program manager at U.S. Army Laboratory Command Adelphi Md. Mr. Mackenzie has a B.S. degree in mechanical engineering from Northwestern University an M.S. degree in the same field from the University of Michigan and an M.B.A. from East Texas State University. Richard Wootten:is project officer of the U.S. Army Material Command's Materials and Parts Availability Control Information Data System Project Adelphi Md. Mr. Wootten holds an associate's degree in mechanical engineering from Northern Virginia Community College and a Bachelor of Science in Electronics Engineering from The University of Alabama. Kevin Hoy:is manager of the Microelectronics Obsolescence Management Program at the Naval Avionics Center Indianapolis. Mr. Hoy holds both bachelor and master of science degrees in mathematics from Purdue University. James Neely:is leader of the Materials Management Team Industrial Materials Division in the Directorate of Manufacturing Air Force Systems Command Dayton Ohio. Mr. Neely holds a bachelor's degree in political science from The University of Georgia and a master of science degree in public administration from The University of Missouri. Don Kosco:is an electronics engineer currently involved with introducing new technologies into weapons systems. He is in the Directorate of Reliability Maintainability and Technology Policy HQ Air Force Logistics Command Dayton Ohio. Mr. Kosco holds a bachelor of engineering degree from Widener University a master's in systems engineering from The Air Force Institute of Technology and an MBA from the University of Texas at San Antonio. William Smith:is head of the Plans Branch in the Office of Policy and Plans Defense Electronics Supply Center (DESC) Dayton Ohio. He was for many years manager ofDESC's Diminishing Manufacturing Sources (DMS) Program. Mr. Smith holds a bachelor of arts degree in political science from Indiana University.

Both the timely manufacture of defense systems and their subsequent on-line operability depend upon the availability of component parts. The growing problem of microelectronic component nonavailability is casting a shadow over logistics support to these systems. This paper will discuss the causes of the problem and provide some examples of cases confronted by the DoD logistics community. It will also identify some actions which have been taken in the past to manage the issue as well as initiatives now underway. Finally it will look at what lies ahead.

关键词： Microelectronics

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On-line identification of continuous time-delay systems using the genetic algorithm

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ELECTRICAL engineering IN JAPAN 1996年第6期116卷 115-126页

作者： Hachino, T Yang, ZJ Tsuji, T Kyushu Institute of Technology Currently in the doctoral program in Electrical Engineering at Kyushu Institute of Technology. He is engaged in research on system identification. He is a member of the Institute of Systems Control and Information Engineers and the Society of Instrument and Control Engineers. Received his Dr. of Eng. degree in 1992 from Kyushu University. Since then he has been a Research Associate in the Department of Electrical Engineering Kyushu Institute of Technology. He is engaged in research mainly in system identification and related genetic algorithms neural networks wavelet analysis and control of magnetic levitation systems etc. He is a member of the Institute of Systems Control and Information Engineers Society of Instrument and Control Engineers and Robotics Society of Japan. Received his Dr. of Eng. degree in 1968 from Kyushu University. In 1968 he became a Lecturer in 1971 an Associate Professor and since 1982 a Professor in the Department of Electrical Engineering Kyushu Institute of Technology. He was Visiting Researcher at the University of Minnesota under the sponsorship of the Ministry of Education from 1986 to 1987. He is engaged in research mainly on control theory and power electronics. He is a member of the Institute of Systems Control and Information Engineers

This paper proposes a new kind of on-line identification method of continuous time-delay systems from sampled input-output data. In order to track the time-varying system parameters as well as time-delay, the recursive linear least squares (RLS) method is combined in a bootstrap manner with the genetic algorithm (GA) which has a high potential for global optimization. The time-delay is coded into binary bit strings and searched by the GA, while the system parameters are updated by the RLS method. Furthermore, this method (GALS method) is hybridized with the sequential nonlinear least squares method to improve the speed of convergence. Simulation results show that both the GALS and hybrid methods are efficient in the case that the system changes abruptly, and among them the hybrid method has superior convergence property to the GALs method and yields excellent estimation results in the case that the system changes with time continuously.

关键词： on-line identification continuous-time system time-delay system recursive least squares method sequential nonlinear least squares method genetic algorithm

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Radar Occupancy Prediction with Lidar Supervision while Preserving Long-Range Sensing and Penetrating Capabilities

arXiv

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arXiv 2021年

作者： Kung, Pou-Chun Wang, Chieh-Chih Lin, Wen-Chieh The Graduate Degree Program of Robotics National Yang Ming Chiao Tung University Hsinchu Taiwan The Department of Electrical and Computer Engineering National Yang Ming Chiao Tung University Taiwan The Mechanical and Mechatronics Systems Research Laboratories Industrial Technology Research Institute Hsinchu Taiwan The Department of Computer Science National Yang Ming Chiao Tung University Hsinchu Taiwan

Radar shows great potential for autonomous driving by accomplishing long-range sensing under diverse weather conditions. But radar is also a particularly challenging sensing modality due to the radar noises. Recent works have made enormous progress in classifying free and occupied spaces in radar images by leveraging lidar label supervision. However, there are still several unsolved issues. Firstly, the sensing distance of the results is limited by the sensing range of lidar. Secondly, the performance of the results is degenerated by lidar due to the physical sensing discrepancies between the two sensors. For example, some objects visible to lidar are invisible to radar, and some objects occluded in lidar scans are visible in radar images because of the radar's penetrating capability. These sensing differences cause false positive and penetrating capability degeneration, respectively. In this paper, we propose training data preprocessing and polar sliding window inference to solve the issues. The data preprocessing aims to reduce the effect caused by radar-invisible measurements in lidar scans. The polar sliding window inference aims to solve the limited sensing range issue by applying a near-range trained network to the long-range region. Instead of using common Cartesian representation, we propose to use polar representation to reduce the shape dissimilarity between long-range and near-range data. We find that extending a near-range trained network to long-range region inference in the polar space has 4.2 times better IoU than in Cartesian space. Besides, the polar sliding window inference can preserve the radar penetrating capability by changing the viewpoint of the inference region, which makes some occluded measurements seem non-occluded for a pretrained network. Copyright © 2021, The Authors. All rights reserved.

关键词： Optical radar

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WHY ENGINEERS DONT UNDERSTAND LOGISTICS

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NAVAL ENGINEERS JOURNAL 1992年第5期104卷 57-63页

作者： LIGHT, SP The Authoris currently the director Logistics and Material Division Security Assistance Program Management Office (PMS 380) in the Surface Combatants Directorate (SEA 91) Naval Sea Systems Command. He received his BS degree in mechanical engineering from West Virginia Institute of Technology his MS degree in systems management from the University of Southern California and he is a graduate of the Defense Systems Management College. He is also certified as a member of the NavSea's Civilian Material Professional Career Program. Among his previous employments Mr. Light has held engineering and logistics management positions with the U.S. Coast Guard Headquarters in the Naval Engineering Division the Naval Ship Systems Command Engineering Interface Management Office and the Naval Ship Engineering Center where he served as manager of integrated logistics support for the FFG-7 Ship Design Project Office. He also served as the ILS manager for the CG-47 and DDG-51 ship programs during the design phases of these programs. Mr. Light was also the director of the Acquisition and Logistics Office for Surface Combatants (SEA 91) between 1984 to 1991. Mr. Light has twenty-eight years of experience in surface ship design acquisition maintenance and logistics.

The author describes his observations during twenty-eight years of naval ship design, acquisition and logistics support experience that engineers do not understand logistics or even consider logistics as part of their engineering responsibilities. This paper will explore the reasons why. The paper will also provide reasons why the engineer should understand logistics and why it should become a part of the engineer's responsibilities and lexicon. The paper presents the position that an engineer armed with a knowledge of logistics can do the best job in producing a good supportability design. Recommendations are provided to the naval engineering and logistics communities to increase the logistics knowledge of engineers. Also, the author advocates the development of design techniques to be used by the engineer to produce good supportability designs. The increased role of the engineer in applying supportability design techniques will be required in the future if we are to do more with the planned reductions in the acquisition workforce.

关键词： engineering

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Single-cell transcriptomics uncovers EGFR signaling-mediated gastric progenitor cell differentiation in stomach homeostasis (vol 14, 3750, 2023)

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NATURE COMMUNICATIONS 2023年第1期14卷 1-16页

作者： Takada, Hitomi Sasagawa, Yohei Yoshimura, Mika Tanaka, Kaori Iwayama, Yoshimi Hayashi, Tetsutaro Isomura-Matoba, Ayako Nikaido, Itoshi Kurisaki, Akira Laboratory of Stem Cell Technologies Graduate School of Science and Technology Nara Institute of Science and Technology Takayama-cho Ikoma Nara Japan Laboratory for Bioinformatics Research RIKEN Center for Biosystems Dynamics Research Wako Saitama Japan Department of Functional Genome Informatics Biological Data Science Medical Research Institute Tokyo Medical and Dental University Bunkyo Tokyo Japan Master’s/Doctoral Program in Life Science Innovation (Bioinformatics) Degree Programs in Systems and Information Engineering Graduate School of Science and Technology University of Tsukuba Tsukuba Ibaraki Japan

Defects in gastric progenitor cell differentiation are associated with various gastric disorders, including atrophic gastritis, intestinal metaplasia, and gastric cancer. However, the mechanisms underlying the multilineage differentiation of gastric progenitor cells during healthy homeostasis remain poorly understood. Here, using a single-cell RNA sequencing method, Quartz-Seq2, we analyzed the gene expression dynamics of progenitor cell differentiation toward pit cell, neck cell, and parietal cell lineages in healthy adult mouse corpus tissues. Enrichment analysis of pseudotime-dependent genes and a gastric organoid assay revealed that EGFR-ERK signaling promotes pit cell differentiation, whereas NF-κB signaling maintains gastric progenitor cells in an undifferentiated state. In addition, pharmacological inhibition of EGFR in vivo resulted in a decreased number of pit cells. Although activation of EGFR signaling in gastric progenitor cells has been suggested as one of the major inducers of gastric cancers, our findings unexpectedly identified that EGFR signaling exerts a differentiation-promoting function, not a mitogenic function, in normal gastric homeostasis.

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