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International Symposium on Unmanned Untethered Submersible Technology

作者： S.I. Sagatun Marine System Engineering Laboratory University of New Hampshire USA Division of Marine System Design Department of Marine Engineering and Naval Architecture Norwegian Institute of Technology Norway

This paper describes a situation assessment system for an autonomous underwater vehicle (AUV). This system is a result of research on knowledge-based guidance systems applied to AUVs, which is currently taking place at the Marine system Engineering Laboratory, University of New Hampshire. This paper gives the reader some background on the project, an introduction to the MSEL KBS architecture, and a description of how the situation assessment system is implemented. In a dynamic world with a complex mission, a mobile robot needs the ability to analyze its environment and its situation. We call this situation assessment. Since unplanned situations will most likely occur, the robot will need some ability to perform qualitative reasoning on its situation, before it modifies its original plan. This qualitative reasoning implies a system capable of building and maintaining a model of the vehicle's environment and itself. It also involves use of data from several different sources (sensor fusion) and combining these data into more abstract terms.

关键词： Underwater vehicles Remotely operated vehicles Costs Laboratories systems engineering and theory Mobile robots Inspection design engineering Vehicle dynamics Navigation

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A novel LDPC decoder for DVB-S2 IP 09

A novel LDPC decoder for DVB-S2 IP

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design, Automation and Test in Europe Conference and Exhibition

作者： Stefan Muller Manuel Schreger Marten Kabutz Matthias Alles Frank Kienle Norbert Wehn THOMSON-System Architecture Group Villingen-Schwenningen Germany Microelectronic Systems Design Research Group University of Kaiserslautern Kaiserslautern Germany

ISBN: (纸本)9783981080155

In this paper a programmable Forward Error Correction (FEC) IP for a DVB-S2 receiver is presented. It is composed of a Low-Density Parity Check (LDPC), a Bose-Chaudhuri-Hoquenghem (BCH) decoder, and pre- and postprocessing units. Special emphasis is put on LDPC decoding, since it accounts for the most complexity of the IP core by far. We propose a highly efficient LDPC decoder which applies Gauss-Seidel decoding. In contrast to previous publications, we show in detail how to solve the well known problem of superpositions of permutation matrices. The enhanced convergence speed of Gauss-Seidel decoding is used to reduce area and power consumption. Furthermore, we propose a modified version of the lambda-Min algorithm which allows to further decrease the memory requirements of the decoder by compressing the extrinsic information. Compared to the latest published DVB-S2 LDPC decoders, we could reduce the clock frequency by 40% and the memory consumption by 16%, yielding large energy and area savings while offering the same throughput.

关键词： Parity check codes Decoding Digital video broadcasting Forward error correction Gaussian processes Convergence Energy consumption Clocks Frequency Throughput

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Dynamic monitoring of an existing reinforced concrete building in naples port area

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Open Civil Engineering Journal 2021年第1期15卷 226-235页

作者： Bencivenga, Pasquale Chisari, Corrado Dell’aversano, Costantino Pasquino, Vittorio Ferraioli, Massimiliano Vasaturo, Adele De Matteis, Gianfranco Department of Architecture and Industrial Design University of Campania “Luigi Vanvitelli” Via San Lorenzo CE Aversa 81031 Italy Department of Engineering University of Campania “Luigi Vanvitelli” Via Roma 9 CE Aversa 81031 Italy Central Tyrrhenian Sea Port System Authority Piazzale Pisacane Naples Italy

Introduction: The conservation and preservation of existing buildings, in particular public infrastructures, is currently a significant issue in Italy and Europe, considering their strategic role and the risk represented by human losses, management issues and also economic disruption in case of collapse. In this context, the interest in conservation is not restricted to monumental or artistical buildings but also includes the several buildings composing the Italian infrastructural heritage, which in many cases are made of reinforced concrete and show signs of ageing after half a century and more from their construction. Methods: On the basis of these premises, in the present paper, a preliminary investigation on an infrastructural case study located in Naples port is presented. Such a study is part of a research activity aimed at defining critical structural issues of the central administrative building of the Central Tyrrhenian Sea Port system Authority. Results: A system of high-sensitivity and low-cost MEMS acceleration sensors were installed on the structure, with the aim of investigating its dynamic behaviour. A Finite Element model of the building was created, including information about material properties and cross-section details from prior experimental activities. A model updating procedure was carried out, based on the dynamic data collected by the monitoring system and post-processed to estimate the fundamental frequencies. Conclusion: This has allowed highlighting the main features of the dynamic response of the building, and the critical role played by deformability of infill panels and floors on the modal properties of the structure. © 2021 Bencivenga et al.

关键词： Accelerometer Dynamic monitoring Dynamic response Existing infrastructure heritage Model updating Structural assessment

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Advances in Industrial design 1

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丛书名： Advances in Intelligent systems and Computing

1000年

作者： Giuseppe Di Bucchianico Cliff Sungsoo Shin Scott Shim Shuichi Fukuda Gianni Montagna Cristina Carvalho

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The Features of Reconstruction for Floor Slabs of Multistorey Apartment House After Temperature Effects as a Result of Military Operations 1

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4th International Scientific Conference EcoComfort and Current Issues of Civil Engineering, EcoComfort 2024

作者： Ilnytskyy, Borys Kramarchuk, Andrii Hladyshev, Dmytro Lytvyniak, Oksana Institute of Civil Engineering and Building System Lviv Polytechnic National University Lviv79013 Ukraine Institute of Architecture and Design Lviv Polytechnic National University Lviv79013 Ukraine Viacheslav Chornovil Institute of Sustainable Development Lviv Polytechnic National University Lviv79013 Ukraine

ISBN: (数字)9783031675768

ISBN: (纸本)9783031675751

This article presents a reconstruction procedure for prefabricated reinforced concrete floor slabs in a multistorey apartment building in Lviv (Ukraine). These floor slabs were exposed to enormous fire loading and were damaged due to explosions from two shells. The study revealed that the detected defects and damages significantly reduce the reliability and rigidity of floor slabs because of the loss of bond strength between the principal reinforcement and concrete. As a result of fire loading, the study also determined that there was a loss of prestressed and design resistance in the principal reinforcement. This research aimed to investigate how temperature fluctuations affect the stiffness of the studied floor slabs. The rigidity of floor slabs was related to the level of its fixed deflection (its value was 14.5 mm), determined under the action of only a constant load from its weight. In this article, the strengthening of damaged floor slabs is proposed by arranging cages of reinforcement in the hollows of slabs and increasing their effective height and correspondingly compressed zone at the expense of a monolithic reinforced concrete slab. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Apartment houses

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High-Performance Placement Engine for Modern Large-Scale FPGAs with Heterogeneity and Clock Constraints

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IEEE Transactions on Computer-Aided design of Integrated Circuits and systems 2024年第3期43卷 956-969页

作者： Zhu, Ziran Mei, Yangjie Deng, Kangkang He, Huan Chen, Jianli Yang, Jun Chang, Yao-Wen Southeast University National ASIC System Engineering Research Center School of Integrated Circuits Nanjing210096 China Peking University Beijing International Center for Mathematical Research Beijing100871 China Hangzhou Huawei Enterprises Telecommunication Technologies Company Ltd. Central Hardware Planning & Architecture Design Department Hangzhou310000 China Fudan University State Key Laboratory of ASIC and System Shanghai200433 China National Taiwan University Graduate Institute of Electronics Engineering The Department of Electrical Engineering Taipei10617 Taiwan

As field-programmable gate array (FPGA) architectures continue to evolve and become more complex, the heterogeneity and clock constraints imposed by modern FPGAs have posed significant challenges to FPGA placement. This article proposes a high-performance placement engine for modern large-scale FPGAs with heterogeneity and clock constraints. To improve efficiency and scalability, we develop a clustering method considering both internal/external connectivity and the balance of block types to build the hierarchy. In each hierarchy level, we propose a hybrid penalty and augmented Lagrangian method (HPALM) to convert the FPGA global placement with heterogeneity and clock constraints into a series of unconstrained optimization subproblems, then use the Adam method to solve each subproblem. In particular, we prove that the HPALM is globally convergent for global placement. Besides, a matching-based IP block legalization is developed to legalize the DSPs and RAMs, and a multistage packing is presented to cluster LUTs and FFs into HCLBs. Finally, we propose a history-based legalization to legalize CLBs in an FPGA, and a simulated-annealing-based detailed placement is presented to reduce the wirelength while maintaining legality. Compared with the state-of-the-art works, experimental results based on the ISPD 2017 contest benchmarks show that the proposed algorithm can achieve the shortest routed wirelength in a reasonable runtime. © 1982-2012 IEEE.

关键词： Table lookup

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Gas Dispersion Analysis on the Open Deck Fuel Storage Configuration of the LNG-Fueled Ship 1

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6th International Conference and Exhibition on Sustainable Energy and Advanced Materials, ICE-SEAM 2019

作者： Nubli, Haris Prabowo, Aditya Rio Sohn, Jung Min Interdisciplinary Program of Marine Convergence Design Pukyong National University Busan48513 Korea Republic of Department of Mechanical Engineering Universitas Sebelas Maret Surakarta57126 Indonesia Department of Naval Architecture and Marine System Engineering Pukyong National University Busan48513 Korea Republic of

ISBN: (数字)9789811544811

ISBN: (纸本)9789811544804

The LNG (Liquefied Natural Gas) fueled ship is one of the solution to solve the emission of SOx and NOx in conventional maritime fuel. Despite the advantages, the LNG fuel is more dangerous due to their low flash point. The leakage of gas fuel is one of the threat of LNG-fueled vessel, due to its explosive characteristic. This study aims to establish the exclusion zone due to LNG dispersion. The analysis contained the potential leakage and gas dispersion along to the exposed area. A verified Computational Fluid Dynamics (CFD) analysis based on the time accuracy assumption using KFX software was performed to simulate the dynamic behavior of the vapor dispersion. The scenarios were categorized by the leak size, leak location, and mass flow rate. The required environment parameters, e.g., wind speed and wind directions were also considered. It is found that the behavior of dispersed vapor was strongly depending on the leak location and mass flow rate. Surprisingly, the environment parameter has slightly affected the distance of the vapor dispersion. According to these findings, to deliver risk mitigation in a gas leakage accident, the exclusion zone was provided. © 2020, Springer Nature Singapore Pte Ltd.

关键词： Computational fluid dynamics Exclusion zone Gas dispersion analysis LNG-fueled ship

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Definition and use of logical and physical architecture within vehicle concept development

Definition and use of logical and physical architecture with...

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IEEE International Symposium on systems Engineering (ISSE)

作者： Jonas Krog Arne Thom Suden David Schneider Thomas Vietor Vehicle System Architecture & Concept Development Volkswagen AG Wolfsburg Germany Institute for Engineering Design Technical University Braunschweig Braunschweig Germany

ISBN: (纸本)9781665481830

The automotive industry is currently undergoing a change in the development philosophy from component-oriented towards function-oriented Model-Based systems Engineering (MBSE). This originates in upcoming, disrupting trends where cars are transforming to digital, connected systems. The interconnected relationships in the vehicle system and the company organization will not be manageable with today's development methods. MBSE requires a sophisticated methodology, like the RFLP-framework suggests. Fundamental to MBSE is the architecture aspect of the system. Such architecture is represented with a system model and offers different architecture views (FLP), for specific concerns. Especially the differentiation between logical (L) and physical (P) perspective is rather uncommon, no standard understanding can be identified. This contribution compares existing understandings of L and P architecture views and derives a detailed definition. As L and P are consecutive architecture views and strongly dependent on each other, the transition and specification process of those is elaborated as well. Thereby the so called architecture node is introduced, offering a methodical support to transform L into P architecture. In conclusion, the relevance of P-decisions in the RFLP-framework is to be emphasized.

关键词： systematics Uncertainty Philosophical considerations Standards organizations Transforms Market research Behavioral sciences

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Architecting system of systems for Resilience using MBSE

Architecting System of Systems for Resilience using MBSE

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IEEE International Conference on system of systems Engineering (SoSE)

作者： Prakhar Agarwal Rafael Estanguet François Leblanc Dominiaue Ernadote Systems Engineering and Architecture Capgemini Engineering Toulouse France System-of-Systems Design & Governance Services Airbus Defence & Space Toulouse France

With rapid growth in the interconnectivity and interdependency among systems to deliver diverse set of capabilities, the challenge of architecting such system of systems is becoming more complex, more so with the rapid evolution of technologies. To ease the involved complexity and challenges of system of systems Engineering (SoSE), this paper summarizes the proposed approach and methodology for conducting architecture analysis of system of systems (SoS) for resilience, and for assessing the SoS architectures qualitatively and quantitatively for the maturity level of resilience, using Model Based systems Engineering (MBSE) as a support. The approach has been arrived at based on a taxonomy of principles that enable resilience in an architecture. Unified architecture Framework (UAF) is used as a reference for defining the architecture principles, which can be utilized for defining the architecture in MBSE. The Search and Rescue sample model of SoS in UAF Plugin of Cameo systems Modeler has been both augmented and assessed using the proposed methodology and architecture principles.

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Development of an environmental performance assessment tool for municipalities incorporating database and GIS application

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AIJ Journal of Technology and design 2013年第43期19卷 1023-1026页

作者： Kawakubs, Shun Ikaga, Toshiharu Murakami, Shuzo Dept. of Architecture Faculty of Engineering and Design Hosei Univ. Japan Dept. of System Design Engineering Faculty of Science and Technology Keio Univ. Japan Institute for Building Environment and Energy Conservation Japan

Environmental performance assessment tool for municipalities (CASBEE-City) has been developed and upgraded since 2008. The tool automatically queries the database and extracts the necessary data for conducting the nationwide municipality assessment. The tool also incorporates GIS functionality and enables tool users to understand the conditions, strengths, and weaknesses of their municipalities in comparison with other municipalities in Japan by visualizing the assessment results on easy-to-understand maps.

关键词： Geographic information systems

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