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IEEE Conference on Vehicular Technology (VTC)

作者： Byung-Chul Kim I-Tai Lu System Architecture Design Laboratory TN Business Samsung Electronics Company Limited Suwon Gyeonggi South Korea Department of Electrical and Computer Engineering Polytechnic University Melville NY USA

ISBN: (纸本)0780377575

A novel frequency domain Doppler diversity technique for OFDM systems is proposed. The received OFDM signal is first frequency shifted to generate various diversity branches. After demodulation, branch outputs are individually weighted and added together. For Doppler spread signal, it alters fading statistics and improves the bit error rate. Extensive simulations show that combining three diversity branches with proper frequency shifts reduces BER by an order when the normalized Doppler spread is larger than 0.3.

关键词： OFDM Wireless communication Mobile communication Frequency domain analysis Diversity reception Frequency diversity Bit error rate Signal generators Demodulation Fading

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The impact of daylight and window views on length of stay among patients with heart disease:A retrospective study in a cardiac intensive care unit

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Journal of Intensive Medicine 2023年第2期3卷 155-164页

作者： Roxana Jafarifiroozabadi Anjali Joseph William Bridges Andrea Franks College of Architecture and Design Lawrence Technological UniversitySouthfieldMI 48075USA Spartanburg Regional Healthcare System Endowed Chair in Architecture+Health Design Clemson UniversityClemsonSC 29634USA Center for Health Facilities Design and Testing Clemson UniversityClemsonSC 29634USA School of Architecture Clemson UniversityClemsonSC 29634USA Industrial Engineering Clemson UniversityClemsonSC 29634USA School of Mathematical and Statistical Sciences Clemson UniversityClemsonSC 29634USA Clinical and Nursing Research AnMed HealthAndersonSC 29621USA

Background:Heart disease is the leading cause of death in the United *** length of stay(LOS)is a well-established parameter used to evaluate health outcomes among critically ill patients with heart disease in cardiac intensive care units(CICUs).While evidence suggests that the presence of daylight and window views can positively influence patients’LOS,no studies to date have differentiated the impact of daylight from window views on heart disease ***,existing research studies on the impact of daylight and window views have failed to account for key clinical and demographic variables that can impact the benefit of such interventions in ***:This retrospective study investigated the impact of access to daylight *** views on CICU patients'*** study CICU is located in a hospital in the southeast United States and has rooms of the same size with different types of access to daylight and window views,including rooms with daylight and window views(with the patient bed located parallel to full-height,south-facing windows),rooms with daylight and no window views(with the patient bed located perpendicular to the windows),and windowless *** from electronic health records(EHRs)for the time-period September 2015 to September 2019(n=2936)were analyzed to investigate the impact of room type on patients’CICU *** regression models were developed for the outcome of interest,controlling for potential confounding ***:Ultimately,2319 patients were finally included in the study *** indicated that patients receiving mechanical ventilation in rooms with access to daylight and window views had shorter LOS durations(16.8 h)than those in windowless *** analysis for a subset of patients with LOS≤3 days revealed that parallel bed placement to the windows and providing access to both daylight and window views significantly reduced their LOS compared to windowless rooms in the unit(P=0.007).Also,parallel b

关键词： Heart disease Daylight Window views Length of stay Cardiac intensive care unit

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SHIPBOARD COGENERATION - A 2ND GENERATION design APPROACH

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NAVAL ENGINEERS JOURNAL 1985年第4期97卷 306-314页

作者： MASTRONARDE, TP The Author is manager proposal engineering Combustion Engineering Inc. Marine and Industrial Packaged Steam Systems. He graduated from Webb Institute of Naval Architecture in 1969 receiving his B.S. degree in naval architecture and marine engineering. He served in the U.S. Coast Guard as a staff naval architect in the Hull and Electrical Sections of the Merchant Marine Technical Group. Mr. Mastronarde joined Combustion Engineering in 1972 working in the area of marine steam generator design andperformance. Pursuing studies on heat transfer he received an M.S. degree in mechanical engineering from the University of Connecticut in 1977 Mr. Mastronarde has authored papers dealing with marine propulsion boiler performance and auxiliary and waste heat recovery steam system design and is currently responsible for proposal engineering for these products. A member of ASNE since 1972 he is also a member of SNAME and ASME.

On the CG-47 class, gas turbine electric generators are operating in a shipboard cogeneration system in conjunction with a successful and reliable waste heat recovery system which provides steam for auxiliary services. The current application philosophy for waste heat recovery from gas turbine auxiliary engines aboard Navy ships, however, has reached a technological plateau. The development and implementation of a second generation waste heat recovery system (WHRS) design could produce substantial benefits for future naval shipboard applications. This paper discusses methods of optimizing the interface between the gas turbine and the waste heat boiler, relocating boiler components, utilizing natural instead of forced circulation in the boiler, and reducing the complexity of feedwater treatment subsystems. Implementaion of integrated design features for a second generation waste heat recovery system could result in increased steam production, reduced boiler and auxiliary space requirements, reduced weight, and a lower shipboard center of gravity. In addition, a reduction in installed system cost and manhours spent on water treatment and routine shipboard maintenance could be obtained, along with significant, continued shipboard energy savings.

关键词： COGENERATION PLANTS

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Investigating the central place theory using trajectory big data

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Fundamental Research 2024年第3期5卷 1084-1096页

作者： Zhao, Pengjun Hu, Haoyu Yu, Zhao College of Urban and Environmental Sciences Peking University Beijing 100871 China School of Urban Planning and Design Peking University Shenzhen Graduate School Shenzhen 518055 China Laboratory for Earth Surface System and Human-Earth Relations Ministry of Natural Resources of China Peking University Shenzhen Graduate School Shenzhen 518055 China Faculty of Architecture Civil and Transportation Engineering Beijing University of Technology Beijing 100124 China

The human settlement system is central to land use, infrastructure development, and environmental impacts. Although central place theory (CPT) was proposed about 90 years ago and has been extensively examined by many researchers, to what extent CPT can explain the current rural settlement system in the changing age of informatization and geospatial reconstruction remains to be explored. This paper aims to contribute fresh evidence for settlement systems and examine the applicability of CPT's quantitative laws by using the trajectory data of 2.0362 billion trips from 37.53 million mobile phone users in China's Jing-Jin-Ji region (218,000 km² area). We found that the settlement system's distribution patterns and service range conformed with the hierarchical law in CPT. However, the former was closer to the administrative principle (K = 7) in Christaller's theory, while the latter was nearer to the marketing principle (K = 3). The basic service range of all levels of settlements for rural residents was approximately 3 km, which was reflected by the rural residents' 3 km travel volume peak point. When exceeding this distance, the relationship between travel volume and distance distribution changed from linear increase to power-law attenuation. The traditional three principles of CPT influenced the settlements’ service range and K value. Nevertheless, the specific roles of the influencing factors varied in space. The findings of this paper would enhance our knowledge of CPT and settlement systems in the context of a fast growing and rapidly urbanizing society. © 2023

关键词： Big data Central place theory China Mobile phone data Settlement system

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Development of LCA tool based on endpoint modeling of residents for the initial stage of housing design: Examination concerning assessment framework for detached housing Part 1

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Journal of Environmental Engineering (Japan) 2013年第691期78卷 719-724页

作者： Takayama, Azusa Asano, Koichi Hasegawa, Ken-Ichi Kanno, Hideto Murata, Ryo Tenma, Yuki Kaneko, Naoshi Graduate School Integrated Course of Systems Science and Technology Akita Prefectural University Japan Dept. of Architecture and Environment System Faculty of Systems Science and Technology Akita Prefectural University Japan Dept. of Architecture and Building Engineering Tokyo Institute of Technology Japan Graduate School Course of Joint in Life Cycle Design Engine Ering Akita Prefectural University Japan ESTEC DESIGN Japan

Some tools for calculating CO2 emissions have been developed for housing Life Cycle Assessment (LCA). However, these present tools are hard to assess a direct impact of resident such as health risk and amenity. It is considered that the tool that can assess the direct impact of residents can be helpful in checking up the cost-effectiveness on a personal level during the housing design. In this study, we propose a new LCA tool that is based on the Life-cycle Impact assessment Method using by Endpoint modeling (LIME) developed by The National Institute of Advanced Industrial Science and Technology (AIST) and introduce a part of the LCA tool experimentally. This proposed LCA tool considers the method of existing earthquake risk management and human health risk assessment such as disability-adjusted life years (DALY) by WHO. Also, it is embedded in a function to estimate by buildup approach. The final cost is obtained by integrating the required cost (internal cost) with damage to environment and human health (external cost). Additionally, the item that adds to inventory, impact category and category endpoint for calculation of external cost at each stage can be selected. Since the idea of this LCA tool can be helpful for architect and client to determine the direction of housing design, we discuss the convenience of LCA tool in this paper.

关键词： Life cycle

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Overview of collaborative multi-fidelity multidisciplinary design optimization activities in the dlr project victoria

Overview of collaborative multi-fidelity multidisciplinary d...

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AIAA AVIATION 2020 FORUM

作者： Görtz, S. Abu-Zurayk, M. Ilić, Č. Wunderlich, T. Keye, S. Schulze, M. Klimmek, T. Kaiser, C. Süelözgen, Ö. Kier, T. Schuster, A. Dähne, S. Petsch, M. Kohlgrüber, D. Häßy, J. Mischke, R. Weinert, A. Knechtges, P. Gottfried, S. Hartmann, J. Fröhler, B. Institute of Aerodynamics and Flow Technology Braunschweig38108 Germany Institute of Aeroelasticity Göttingen37073 Germany Institute of System Dynamics and Control Weßling82234 Germany Institute of Composite Structures and Adaptive Systems Braunschweig38108 Germany Institute of Structures and Design Stuttgart70569 Germany Institute of Propulsion Technology Cologne51147 Germany Institute for Software Technology Cologne51147 Germany Institute of Software Methods for Product Virtualization Dresden01062 Germany Institute of System Architecture in Aeronautics Hamburg21129 Germany

ISBN: (数字)9781624105982

ISBN: (纸本)9781624105982

The DLR project VicToria brings together disciplinary methods and tools of different fidelity for collaborative multidisciplinary design optimization (MDO) of long-range passenger aircraft configurations, necessitating the use of high-performance computing. Three different approaches are being followed to master complex interactions of disciplines and software aspects: an integrated aero-structural wing optimization based on high-fidelity methods, a multi-fidelity gradient-based approach capable of efficiently dealing with many design parameters and many load cases, and a many-discipline highly-parallel approach, which is a novel approach towards computationally demanding and collaboration intensive MDO. The XRF-1, an Airbus provided research aircraft configuration representing a typical long-range wide-body aircraft, is used as a common test case to demonstrate the different MDO strategies. Additional results are presented for the NASA Common Research Model (CRM) to show their flexibility. Parametric disciplinary models are used in terms of overall aircraft design synthesis, loads analysis, flutter, structural analysis and optimization, engine design, and aircraft performance. The different MDO strategies are shown to be effective in dealing with complex, real-world MDO problems in a highly collaborative, cross-institutional design environment, involving many disciplinary groups and experts and a mix of commercial and in-house design and analysis software. © 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Research aircraft

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Assessment of method for measuring clo value using human body - Assessment of method for measuring clo value that assumes human body temperature adjustment 13

Assessment of method for measuring clo value using human bod...

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13th REHVA World Congress, CLIMA 2019

作者： Yamato, Yoshiaki Kurazumi, Yoshihito Fukagawa, Kenta Tobita, Kunihito Kondo, Emi Department of Architecture and Structural Engineering National Institute of Technology Kure College Aga-minami Kure Hiroshima737 8506 Japan Department of Human Environment Design Sugiyama Jogakuen University Motomachi Hoshigaoka Chikusa-ku Nagoya464 8662 Japan Department of Architecture Kyusyu Sangyo University Matsukadai 2 Higashi-ku Fukuoka813 8503 Japan College of Sustainable System Sciences Osaka Prefecture University Gakuen-cho Naka-ku Sakai Osaka599 8531 Japan Department of Architecture National institute of technology Ariake College Higashihagio-Machi Omuta Fukuoka836 8585 Japan

In order to make it possible to measure the clo value in various postures, we are studying the measurement method using the human body. Our previous researches showed that clo value measured with the human body is less than that measured with a "constant temperature control"-type thermal manikin. In our previous experiments, human body changes its skin temperature in response to the amount of clothing or changes in the temperature to maintain heat loss, while a "constant temperature control"-type thermal manikin changes its heat loss in response to the temperature or amount of clothing. Human body reaction is similar to "constant heat dissipation" -type thermal manikin. In order to improve the clo value measurement method using the human body, clo value of same clothing by thermal manikin which changed control method to "constant temperature" and "constant heat dissipation" were measured. Relational expressions of thermal insulation of clothes measured by different control methods were shown. © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0

关键词： Heat losses

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Statistical Analysis of Digital Financial Technology Adoption Research

Statistical Analysis of Digital Financial Technology Adoptio...

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2024 International Conference on Science, Engineering and Business for Driving Sustainable Development Goals, SEB4SDG 2024

作者： Ajibade, Temiloluwa Iyanuoluwa Ayodele, Olamide Emmanuel Ajibade, Samuel-Soma M. Goles, Nanet A. Dayupay, Johnry P. Adediran, Anthonia Oluwatosin Scholar School System Department of Business Management Birmingham United Kingdom Ekiti State University Department of Banking and Finance Ekiti State Ado Ekiti Nigeria Sunway University School of Engineering and Technology Department of Computing and Information Systems Selangor Malaysia Cebu Technological University Moalboal Cebu Philippines Federal University of Uberlandia Faculty of Architecture and Urban Design Uberlandia Brazil

ISBN: (纸本)9798350358155

Digital financial technology adoption (DFTA) studies published in Scopus between 2019 and 2022 were examined in this study. After that, we assessed relevant literature, did bibliometric studies, and examined publication and citation patterns. The statistics showed 2643 citations and 176 publications. DFTA research has gained popularity when time-varying TP and TC values increased gradually. This topic's most popular sources are "articles"and "Sustainability (Switzerland)". A search of DFTA research stakeholders revealed several authors, organizations, and nations. Most famously associated with the University of Johannesburg in South Africa, David Mhlanga has produced more publications than anyone else. The National Natural Science Foundation and other Chinese donors who dominate DFTA research funding contributed to researchers' and affiliations' output. Cluster and hotspot analysis revealed two themes, "Digital financial technology adoption"and "Sustainable Banking Inclusion,"and three keywords, Digital financial technology adoption, monetary inclusion, and finance. According to the examined literature, DFTA's effects on international financial stability and GDP growth are understudied. Future research should examine DFTA's environmental impact, long-term profitability, and commercial strategies for low-income and rural communities. © 2024 IEEE.

关键词： Decentralized finance

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Application of the refined mesh method for the strength estimation around openings

Application of the refined mesh method for the strength esti...

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作者： Lee, Kyung-Seok Song, Jae-Young Kim, Kyung Su Kim, Sung Chan Kim, Jung Hee Dept. of Structure Design DSME Okpo Geoje Kyungnam 656-714 Korea Republic of SESTEK Inha University Incheon 402-751 Korea Republic of Dept. of Naval Architecture and Ocean Engineering Inha University Incheon 402-751 Korea Republic of Dept. of Ship and Ocean System Inha Technical College Incheon 402-752 Korea Republic of

It is not easy to solve the troubles around the openings at the detail design stage, because there are a lot of concerning locations. There are not also clear design rules of classification societies. For more detailed strength analysis around holes on the longitudinal girder or transverse web below deck plate, it is also very difficult to decide the boundary condition (B.C) at both ends. Grillage analysis, which considers B.C and more detailed member arrangement, is used in simple analysis. Furthermore, refined mesh method, which use a part of member in the strength analysis, is used to decide *** around holes. Component loads are applied to a refined mesh model separately and *** according to component loading are calculated. S/F and B/M are decided from the grillage analysis and S.I.F for a given hole location is deduced from database and the results of grillage analysis.

关键词： Strength of materials

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Topside design of warships: A 100 year perspective

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NAVAL ENGINEERS JOURNAL 1999年第2期111卷 27-44页

作者： Tibbitts, B Baron, N Captain Barry Tibbitts USN (Ret.):He received his education at the U.S. Naval Academy and MIT. He served five years at sea and eight years at shipyards. From 1976 to 1987 he served in a variety of senior Washington positions: aircrafi carrier (CW) ship design manager Director NVSEC's 450 man Hull Division Director NAVSEC Ship Design Division Commander of the 3000 man David Taylor Research Center (now NSWC CD) and a second three year tour as Director NAVSEA Ship Design Group. He was professor of Navad Construction and Engineering at MIT for three years. While on active duty he received numerous personal decorations including two awarad of the Legion of Merit. Currently he is the Chief Systems Engineer for John J. McMullan Assoc. the country's largest naval architecture and marine engineering company. Since 1986 he has published twelve Papers on naval ship technology design and acquisition. He is a member of SNAME's Ship Design Committee an Overseas Fellow of RINA lectures at the NAVSEA Institute and DSMC and remains on the MIT faculty as a senior lecturer. Neil T. Baron:Mr. Baron is a graduate of Marquette University. He provided senior systems engineering support to ship and system design programs including MCM-1 MHC-51 LHD-5 and headed the the Topside Design branch under the Weapons Systems Directorate at the Naval Sea Systems Command. The Topside Design branch is involved in all new construction and active fleet upgrade programs related to antennas/weapon systems/ship architecture systems engineering integration. Mr. Baron has been instrumental in forwarding the “Topside Vision” for the Navy and currently supports OPNAV and senior NAVSEA steering groups in the development of topside technologies and their application to ship and system acquistion programs. Mr. Baron was recently assigned as technology director for the Warfare Systems Engineering Directorate at NAVSEA and is currently acting as the deputy director for the Navy Afloat Y2K Test Program. He co-teaches the Combat System Design and

The warship design process requires competition, compromise, and iteration. This is as true today as it was when David Taylor was a young officer in the Construction Corps at the turn of the century when the U.S. was struggling to develop a world class navy. The naval architects and ordnance engineers of his day wrestled over topside arrangements much as do their current counterparts. They tried to anticipate future threats, and they worried about cost because they were in an arm's race. These were total ship engineering issues, although the phrase had not yet been coined. What is different today! It is tempting to say that the short answer is technology. And, more importantly, the rate of change. Yet, an objective appraisal of David Taylor's era tells us that they too experienced an explosion in technology. Just the years 1900-1910 alone saw the introduction of dreadnought battleships, submarines, and aircraft. We are still trying to grapple with the implications of the last two warfare systems. History tells us that our predecessors got it right more often than wrong. Why? Because they recognized the need to change the way they did business in the face of new technologies and new threats.

关键词： Worry topside Officers WARSHIP Arms race Perspective Ordnance design process

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