检索结果-内蒙古大学图书馆

Application of 3-D nonlinear wave-load and structural-response simulations in naval ship design

NAVAL ENGINEERS JOURNAL 1997年第3期109卷 253-266页

作者： Engle, A Lin, W Salvesen, N Shin, Y Allen H. Engle:is a naval architect in the Hydrodynamic Division of the Naval Sea Systems /Command (NavSea). He received his B.S. degree in engineering scinece from the State University of New York at Buffalo in 1977 and his M.S. degree in ocean engineering from the Unviersity of Hawaii in 1979. Corrently Mr. Engle is the program director of the Navy's Hydrodynamic Loads Technology Development Program. Mr. Engle is Chairman of SNAME Panel on Hull Loadings (HS-1) and contributing member to the International Ship and Offshore Structures Congress's Committee on Dynamics. Moei-Min Lin:is a senior research scientist at the Ship technology Division of Sciences Applications International Corporation (SAIC). He received his B.S. degree in naval architecture and marine engineering from the National Cheng-Kung University Taiwan in 1977 and his Ph.D. degree in ocean engineering from MIT in 1985. He is an expert in computational ship hydrodynamics. He has been the P.I. for development of the Large Amplitude Motions Program (LAMP) system. Nils Salvesen:is the manager of the Ship Technology Division of the Science Application International Corporation (SAIC).He received his B.S. and Ph.D. degree from the Development Naval Architecture and Marine Engineering of the University of Michigan in 1960 and 1966 respectively. He has more then thirty years of experience in the development of ship motion simulation and wave load prediction methods. More than twenty-five years ago he developed the original strip-theory code on which the Navy's ship motions program (SMP) is based. Yung-Sup Shin:is the principal engineer responsible for the hydrodynamic projects in the Research and Development Department of the American Bureau of Shipping New York. He received a Ph.D. degree in hydrodynamic from the Department of Naval Architecture and Marine Engineering of the University of Michigan. In the past eighteen years at ABS he has been involved in the theortical development and analysis of various marine hydrodynamic problems. In recent year

Despite the limits inherent within linearized frequency-domain ship motion and wave load computer codes, strip theory has been found to provide the design community with a fairly robust, practical design tool with reasonable accuracy for most conventional displacement monohulls. However, the advent of new design concepts including multi-hulls and application of new materials as well as the push to incorporate reliability methods within surface ship structural design criteria has highlighted the need for more rigorous methods of developing a lifetime load spectrum. In this paper, a multilevel computation system for predicting ship motions and wave loads, up through and including extreme sea conditions, is presented. This system includes a traditional strip theory approach and newly developed linear and nonlinear three-dimensional time-domain methods. The new nonlinear methods are currently in the process of being validated by the U.S. Navy. The status of the current development is presented. Sample numerical results from the new nonlinear methods are compared with both linear frequency domain predictions and model tests.

关键词： Naval vessels

来源：评论

学校读者我要写书评

暂无评论

Effect of an antiferromagnetic order on tailoring Dzyaloshinskii- Moriya interaction in Pt/Co/IrMn trilayer

Effect of an antiferromagnetic order on tailoring Dzyaloshin...

引用

Magnetic Conference - Short Papers (INTERMAG Short Papers), IEEE International

作者： Sheng-Huai Chen Chao-Yao Yang Chih-Huang Lai Department of Materials Science and Engineering National Tsing Hua University Hsinchu Taiwan Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Undergraduate Degree Program of Systems Engineering and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan

Antiferromagnet (AFM) has currently participated in the spin-orbit torque (SOT) magnetoresistive random access memory (MRAM) technolopgy due to its great potential to be applied to the field-free SOT switching and promote the thermal stability of MRAM. However, effect of the introduction of AFM into the basic structure of SOT-MRAM composed of a heavy metal/ferromagnet (FM) bilayer was still not comprehensively understood. This work reports the effect of how an antiferromagnetic (AFM) order modifies the strength of Dzyaloshinskii-Moriya interaction (DMI) in a heavy metal (Pt)/FM (Co)/AFM (IrMn) trilayer, studied by SOT switching and loop-shift method. Increasing the AFM order reflected on exchange bias (H ex ) through increasing the thickness of IrMn appears to significantly reduce the DMI strength of the trilayer, which leads to the reduction of the external field for yielding a complete SOT switching. The reduced DMI strength may ascribe to the Hex-hosted uni-directional anisotropy suppressing the neighboring spin canting in the FM layer. This stabilization for the magnetic moments via the H ex -hosted uni-directional anisotropy also improved the stability of SOT switching on the random read/write characterization, in which the strong AFM order would promote the memristivity for neuromorphic application and the weak AFM order would give rise to the stochasticity for the purpose of physically unclonable functionality. This work demonstrates the significance of an intrinsic tuning over the AFM order would serve as a switch to turn the SOT device into a stochastic/memristive cell to bridge probabilistic and neuromorphic computing.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Electrical Properties of Spin-coated Indium Tin Oxide for Photosensor Applications

引用

Sensors and Materials 2022年第6期34卷 2053-2064页

作者： Shi, Shih-Chen Chen, Jian-An Lin, Yue-Feng Wang, Chih-Chia Department of Mechanical Engineering National Cheng Kung University No. 1 University Road Tainan City70101 Taiwan Department of Mechanical Engineering National Chin-Yi University of Technology No. 57 Sec. 2 Zhongshan Rd. Taiping Dist. Taichung411030 Taiwan Department of Chemical and Materials Engineering Chung Cheng Institute of Technology National Defense University Taoyuan33509 Taiwan Undergraduate Degree Program of System Engineering and Technology National Yang Ming Chiao Tung University Hsinchu30010 Taiwan

A high-performance indium tin oxide (ITO) coating is key in fabricating an efficient photosensor. The manufacturing process of ITO is complex and time-consuming. Therefore, establishing a production technology that is fast and capable of application to large areas is essential. The dispersion of nanoparticles in the process has a considerable influence on the photoelectric properties of ITO films. The degree of dispersion also determines the existence of the secondary phase, which is harmful during application. In this study, we compared the effect of different dispersion parameters such as the ultrasonic power and type of dispersant on the properties of spin-coated ITO films, i.e., the interfacial zeta potential, extinction ratio, and electrical properties. The electrical properties of spin-coated ITO films were affected by oxygen vacancies and the uniformity of tin oxide doping. Using an ultrasonic crusher with an output power of 600 W (3 h) with D305 dispersant, we obtained ITO particles with a minor hydrodynamic diameter of 176 nm. The spin-coated ITO film comprising these particles had a resistivity of as low as 10-4 Ω·cm after suitable heat treatment and a carrier concentration of approximately 1020 cm-3. The electrical properties of the spin-coated ITO were satisfactory for its application on a photodetector. Finally, we proposed that the service life of a sensor can be evaluated by monitoring the variation of the friction coefficient. © MYU K.K.

关键词： Tin oxides

来源：评论

学校读者我要写书评

暂无评论

Revisiting a hidden order at an ferromagnet/antiferromagnet interface and its switching dynamics

Revisiting a hidden order at an ferromagnet/antiferromagnet ...

引用

Magnetic Conference - Short Papers (INTERMAG Short Papers), IEEE International

作者： Chao-Yao Yang Sheng-Huai Chen Chih-Huang Lai Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Undergraduate Degree Program of Systems Engineering and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Materials Science and Engineering National Tsing Hua University Hsinchu Taiwan

Study on the exchange bias (H ex ) switching in a ferromagnet (FM)/antiferromagnet (AFM) bilayer driven by the spin-orbit torque (SOT) has been an explicit research field and current focus has been devoted to determining the approaches to drive the H ex switching along with specific SOT applications. H ex is magnetically dominant but only reveals the partial facet of IrMn, which is only responsible for the ferromagnetic component at the interface of AFM. Therefore, the complete facet of AFM and its interaction with SOT at an FM/AFM interface is still not fully uncovered. This research reports an SOT-driven hidden order transition behind H ex in a heavy metal (Pt)/FM (Co)/AFM (IrMn) trilayer along with the issue of switching activity at Co/IrMn interface. The exchange coupling across Co/IrMn interface allows a long-range spin order in the form of an exchange-spring configuration, yielding two kinds of order in IrMn: a canting-induced ferromagnetic order for hosting H ex and a hidden Néel order for preserving the antiferromagnetic nature. The former appears to be strongly coupled to the magnetization state of Co during the SOT switching, so it can be reversibly switched with Co on the H ex switching. On the contrary, the hidden Néel order transition re-orientated to the current direction appears to be irreversibly driven by SOT and independent on the current polarity, which can reflect on the magnetoresistance (MR) measurement and X-ray magnetic linear dichroism (XMLD) spectroscopy. Finally, a micromagnetic simulation reveals the dynamic IrMn spins are mainly based on a canting type interface instead of an uncompensated type via an exchange-spring coupling with Co.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Security and Privacy Relate Future Aspects of Artificial Intelligence-Powered Electric Vehicle technology

Security and Privacy Relate Future Aspects of Artificial Int...

引用

International Conference on Electrical engineering, Computer Science and Informatics (EECSI)

作者： Tole Sutikno Anggit Pamungkas Budi Santosa Riky Dwi Puriyanto Ahmad Raditya Cahya Baswara Master Program of Electrical Engineering Universitas Ahmad Dahlan Yogyakarta Indonesia Embedded System and Power Electrinics Research Group (ESPERG) Yogyakarta Indonesia Automotive Technology of Vocational Education Universitas Ahmad Dahlan Yogyakarta Indonesia Undergraduate Program of Electrical Engineering Universitas Ahmad Dahlan Yogyakarta Indonesia

ISBN: (数字)9798350355314

ISBN: (纸本)9798350355321

Artificial Intelligence (AI) and electric vehicles EVs are revolutionizing the future of transportation, automation, and connectivity. The integration of AI in EV technology heralds a transformative era in transportation, characterized by enhanced efficiency, autonomy, and user experience. However, as AI-powered EVs become increasingly prevalent, critical security and privacy challenges emerge that necessitate comprehensive scrutiny. This paper explores the future aspects of security and privacy in AI-powered EVs, highlighting potential vulnerabilities and the implications of data exploitation. Key areas of focus include the cybersecurity threats posed by interconnected vehicle networks, the safeguarding of personal data from unauthorized access, and the development of robust encryption methods to protect vehicular communication systems. Additionally, the paper examines regulatory frameworks and industry standards essential for ensuring the secure deployment of AI in EVs. By addressing these concerns, the research aims to provide a holistic understanding of the measures required to fortify the security and privacy of AI-driven electric vehicles, ultimately contributing to developing a safe and trustworthy transportation ecosystem.

关键词： Data privacy Privacy Protocols Ecosystems Transportation Electric vehicles Encryption Security Autonomous vehicles Information integrity

来源：评论

学校读者我要写书评

暂无评论

A Spin-Orbit Torque Switch at Ferromagnet/Antiferromagnet Interface Toward Stochastic or Memristive Applications via Tailoring Antiferromagnetic Ordering

引用

Advanced Electronic Materials 2023年第12期9卷

作者： Wang, Ssu-Yuan Chen, Sheng-Huai Chang, Hao-Kai Li, Yi-Ting Tseng, Chih-Hsiang Chen, Po-Chuan Yang, Chao-Yao Lai, Chih-Huang Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Department of Materials Science and Engineering National Tsing Hua University Hsinchu300044 Taiwan Undergraduate Degree Program of Systems Engineering and Technology National Yang Ming Chiao Tung University Hsinchu300093 Taiwan

Antiferromagnet (AFM) has currently participated in the spin-orbit torque (SOT) technology due to its great potential to be applied to the field-free SOT switching and to promote the thermal stability of MRAM. However, the effect of varying AFM ordering on the SOT switching and the associated properties is still not comprehensively understood. This work reports how an AFM ordering modifies the strength of Dzyaloshinskii–Moriya-interaction (DMI) in a heavy metal (Pt)/FM (Co)/AFM (IrMn) trilayer and its effects on SOT switching. Increasing the AFM ordering reflects the enhanced exchange bias through increasing IrMn thickness appears to significantly reduce the DMI strength of the trilayer. Controlling the IrMn thickness appears to serve as a unique switch to activate memristivity/stochasticity in the devices via tailoring AFM ordering on exchange bias: The strong AFM ordering via increasing IrMn thickness enables to increase the stability of multi-levels for SOT switching, which promotes the memristivity for neuromorphic application. On the contrary, the weak AFM ordering via reducing IrMn thickness will lead to significant stochasticity for the physically unclonable functionality. This work demonstrates an intrinsic tuning over the AFM ordering will serve as a switch to turn the SOT device into a stochastic/memristive cell to bridge probabilistic and neuromorphic computing. © 2023 The Authors. Advanced Electronic Materials published by Wiley-VCH GmbH.

关键词： Stochastic systems

来源：评论

学校读者我要写书评

暂无评论

RACER - A DESIGN FOR MAINTAINABILITY

引用

NAVAL ENGINEERS JOURNAL 1985年第5期97卷 139-146页

作者： DONOVAN, MR MATTSON, WS Michael R. Donovanis a 1974 graduate of the United States Naval Academy where he received his undergraduate degree in naval architecture. In 1975 he received a master of science degree in naval architecture and marine engineering from the Massachusetts Institute of Technology. After completing the Navy's nuclear power training program he served as machinery division officer in USSBainbridge (CGN-25) and chemistry and radiological controls assistant in USSLong Beach (CGN-9). He successfully completed the Navy's surface warfare officer qualification and passed the nuclear engineer's examination administered by Naval Reactors. He was then assigned to the Ship Design and Engineering Directorate (SEA-05) Naval Sea Systems Command as head systems engineer on the DDG-51 ship design project where he received the Navy Commendation Medal for outstanding performance. He is currently with Solar Turbines Incorporated as manager ship integration and integrated logistic support for the Rankine cycle energy recovery (RACER) system. Mr. Donovan has lectured at Virginia Polytechnic Institute teaching marine engineering and has given presentations on ship design at various symposiums and section meetings for both ASNE and SNAME. He has been a member of ASNE and SNAME since 1972 and is registered as a professional engineer in California and Virginia. Wayne S. Mattsonreceived his B.S. degree in mechanical engineering from Western New England College in 1972. Following graduation he attended Naval Officer Candidate School and was subsequently assigned as a project officer to COMOPTEVFOR where he was responsible for technical and operational test plans their execution and final equipment appraisal. Following a tour as engineering officer aboard the USSNespelen (AOG-55) he was assigned as commissioning MPA aboard the USSElliot (DD-967) the fifthSpruanceclass destroyer. For the past six years he has been employed by Solar Turbines Incorporated in program management within the advanced development department. He is currently

There is a great deal of emphasis currently in the Navy on the issues of reliability and maintainability. If a system or component is out of commission, it obviously cannot perform its mission. Thus, systems and components must be reliable, with low failure rates, and maintainable, with short repair times when the system does become inoperable. To be effective, these attributes must be incorporated into new ship systems early in the design stage. The Rankine cycle energy recovery (RACER) system is a heat recovery steam cycle designed to recover energy from the exhaust of an LM2500 gas turbine for augmentation of a ship's propulsion system. The RACER system provides several advantages to a gas turbine powered ship, one of which is improved fuel efficiency for significant annual fuel savings. This saving does not come free, however, since, in general, any additional system installed in the ship will have some maintenance requirements. In keeping with the Navy's current emphasis, a key philosophy in the design of the RACER system has been to minimize this maintenance burden. After a brief description of the RACER system and its design philosophy, the techniques being used during the design phase to minimize the maintenance burden on the fleet are presented. Trade-off studies concerning acquisition versus life-cycle costs, including fuel and maintenance costs, are discussed. Innovations incorporated into this state-of-the-art system are reviewed with an emphasis on design for affordability.

关键词： COGENERATION PLANTS

来源：评论

学校读者我要写书评

暂无评论

Design and prototype development of advanced oxidation black and gray water treatment systems

引用

NAVAL ENGINEERS JOURNAL 2006年第3期118卷 51-64页

作者： Markle, Stephen P. CDR. STEPHEN P. MARKLE USN (REt.)P.E.a retired US Navy Engineering Duty Officer and is the Engineering Director for Navalis Environmental Systems. His active duty assignments included the staff of the Chief of Naval Operations Director of Surface Warfare as Section Head for Surface Combatant Maintenance and Modernization Program Executive Office Expeditionary Warfare as Assistant Project Manager for the (TAKE 1)Class Program and as Deputy Director Environmental Programs Division at Naval Sea Systems Command. He is a 1993 graduate of the Naval Construction and Engineering Program at the Massachusetts Institute of Technology where he received a Naval Engineers Degree and Master of Science in Mechanical Engineering. Since 1995 he has authored thirteen published technical papers dealing with environmental issues. CDR Markle is the recipient of Fiscal Year 2001 Individual Environmental Quality Awards and Environmental Excellence in Weapon System Acquisition Team Awards from Naval Sea Systems Command Chief of Naval Operations Secretary of the Navy and Secretary of Defense and the 2001 ASNE “Jimmie Hamilton” award. He is a Professional Engineer registered in the State of New York and Commonwealth of Virginia. He serves as the Chair of the Joint ASNE/SNAME Committee on Environmental Engineering and also as Chair of ASTM Ships and Marine Technology Marine Environmental Protection Subcommittee (F25.06).

Regulations governing the discharge of sewage from ships have been in force since the early 1970's. In response, the marine industry has developed ever more complex systems and processes for managing these wastes. The first compliance method involved holding wastes until they could be legally discharged;as technology advanced, treatment systems were developed and installed to enable discharge within regulated waters. As the size and number of ships as increased with maturation of the ocean tourism business, more restrictive regulations have been enacted to minimize the impact on sensitive waters. The trend is toward increasing regulation of both sewage and graywater. The most recent action occurred on 12 October 2005 when the Governor of California signed into law Senate Bill 771 regulating most ship liquid discharges within state waters. This paper describes the development of an innovative advanced wastewater treatment technology, based on advanced oxidation, bearing in mind the lessons learned from systems developed by industry over the past thirty years.

关键词： Wastewater treatment

来源：评论

学校读者我要写书评

暂无评论

An algorithm for conditional-fault local diagnosis of multiprocessor systems under the MM⁎ model

引用

Theoretical Computer Science 2024年 987卷

作者： Lv, Yali Lin, Cheng-Kuan Hsu, D. Frank Fan, Jianxi School of Information Technology Henan University of Chinese Medicine Zhengzhou China Department of Computer Science National Yang Ming Chiao Tung University Hsinchu Taiwan Undergraduate Degree Program of Systems Engineering and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Computer Science and Information Engineering Chung Cheng Institute of Technology NDU Taoyuan Taiwan Department of Computer and Information Science Fordham University New York United States School of Computer Science and Technology Soochow University Suzhou China

Diagnosis is a crucial subject for maintaining the reliability of multiprocessor systems. Under the MM⁎ diagnosis model, Sengupta and Dahbura proposed a polynomial-time algorithm with time complexity O(N5) to diagnose a system with N processors. In this paper, we propose a (α,β)-trees combination S(u,X,α,β) and give an algorithm to identify the fault or fault-free status of each processor for conditional local diagnosis under the MM⁎ model. According to our results, a connected network with a (α,β)-trees combination S(u,X,α,β) for a node u is conditionally locally (α+2β−3)-diagnosable at node u and the time complexity of our algorithm to diagnose u is O(α2β+αβ2). As an application, we show that our algorithm can identify the status of each node of n-dimensional star graph Sn if the faulty node number does not exceed 3n−8. Compared with existing algorithms, our algorithm allows more faulty nodes in a multiprocessor system. © 2024 Elsevier B.V.

关键词： Computational complexity

来源：评论

学校读者我要写书评

暂无评论

Low Cost Muon Telescope (LOCOMOTE) 38

Low Cost Muon Telescope (LOCOMOTE)

引用

38th International Cosmic Ray Conference, ICRC 2023

作者： Huang, Nai-Cheng Lin, Guey-Lin Lai, Kwang-Chang Huang, M.A. Liu, T.C. Institute of Physics National Yang Ming Chiao Tung University Hsinchu City Taiwan Center for General Education Chang Gung University Taoyuan City Taiwan Department of Energy Engineering National United University Taiwan Department of Electrophysics National Yang Ming Chiao Tung University Hsinchu City Taiwan Department of applied physics National PingTung university PingTung City Taiwan Undergraduate Degree Program of Systems Engineering and Technology National Yang Ming Chiao Tung University Hsinchu City Taiwan Chung Cheng Institute of Technology National Defense University Taoyuan Taiwan Leung Center for Cosmology and Particle Astrophysics National Taiwan University Taipei Taiwan

Low Cost Muon Telescope (LOCOMOTE) is a low-cost charged particle detector. Each LOCOMOTE unit includes two pieces of BC408 (2"*2"*1") scintillators, silicon photomultipliers (SiPM), and digital logic circuits. The cost of each LOCOMOTE unit is approximately 200 US dollars and is mainly used as a teaching instrument for high school students in cosmic ray education. Each LOCOMOTE unit can be connected to the network, and data from different units can form a ground array to measure high-energy cosmic ray events. In this report, we present the performance verification of the telescope, including the measurement of cosmic muon angular flux and the feasibility of muon tomography using multiple telescopes. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Telescopes

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：