检索结果-内蒙古大学图书馆

14th International Federation for the Promotion of Mechanism and Machine Science World Congress, IFToMM 2015

作者： Hsu, Ruei-Hung Wu, Yu-Ren Wu, Wei-Te Tran, Van-The Bachelor's Program in Precision System Design Feng Chia University Taichung Taiwan Department of Mechanical Engineering National Central University Taoyuan Taiwan Department of Biomechatronics Engineering National Pingtung University of Science and Technology Pingtung Taiwan

ISBN: (纸本)9789860460988

Screw rotors of a twin screw compressor often deform and interfere due to the cyclic gas pressure and working temperature, which lead to noise, vibration and abrasion of the screw rotors. Therefore, this paper proposed a simplified CAE (Computer Aided engineering) method instead of the past massive and complex CFD (Computational Fluid Dynamics) method to simulate and estimate reasonably the screw rotor load and deformation with considering the gas pressure and working temperature applied on its operating process. The analysis results could provide the possible maximum rotor deformation and cyclic load acting on the rotors for design consideration.

关键词： Deformation

来源：评论

学校读者我要写书评

暂无评论

Applying C4.5 decision tree to analyze insomnia symptoms

Taiwan Journal of Public Health

引用

Taiwan Journal of Public Health 2017年第5期36卷 449-460页

作者： Tsai, Chung-Huang Weng, Shao-Jen Chou, Chun-An Wu, Hsin-Hung Hung, Wei-Zhan Department of Family Medicine Chung-Kang Branch Cheng Ching Hospital Taichung Taiwan Sports Recreation and Health Management Continuing Studies-Bachelor's Degree Completion Program Tunghai University Taichung Taiwan Institute of Medical Care Engineering and Management Tunghai University Taichung Taiwan Department of Mechanical and Industrial Engineering North Eastern University Boston MA United States Department of Business Administration National Changhua University of Education Changhua Taiwan Department of M-Commerce and Multimedia Applications Asia University Taichung Taiwan

Objectives: Insomnia is a common and subjective symptom that influences individuals' quality of life and health. The goal of this research is to apply C4.5 decision tree to identify the key factors for the reference of relevant personnel. Methods: Using a structured questionnaire, we collected physical examination data of 1223 individuals (756 [61.8%] males) older than 20 years attending a Taichung regional hospital. The questions were related to basic demographic information, insomnia symptoms, life style, and mood (depression, anxiety, etc.). This research used SPSS 20.0 to analyze the data. Cronbach's a for depression scores, anxiety scores, and total scores was 0.78, 0.78, and 0.86, respectively. The C4.5 decision tree in Weka 3.8.1 were applied to generate a rule of which combination of factors are most likely to generate insomnia symptoms. Results: "Difficulty falling asleep," "Interrupted night sleep, " "Wake up early," "Wake up tired," and "Serious insomnia problem" were highly correlated. Males were more likely to score high on "Difficulty falling asleep" and "Interrupted night sleep." "Drinking water before sleeping," "Drinking alcohol before sleeping," "Habit of drinking coffee," and "Habit of drinking tea" were positively correlated with "Serious insomnia problem." "Sleeping pills" was positively correlated with each kind of insomnia symptom. "Difficulty falling asleep" and "Interrupted night sleep" were less likely in individuals who were employed. Family pressure, work pressure, and other pressure, may also generate insomnia symptoms. Exercise was associated with reduced insomnia symptoms, irrespective of the exercise frequency and exercise volume. "Drinking alcohol before sleeping" could overcome insomnia problems over the short-term. "Abstaining from drinking coffee" allowed some individuals to reduce insomnia symptoms. Using medicine not only generated various side effects, but may also have generated different insomnia symptoms in some individuals.

关键词： 5 decision tree C4 Depression Health management Insomnia

来源：评论

学校读者我要写书评

暂无评论

Recent innovations in material research

Recent innovations in material research

引用

作者： Cai, W.J. Chen, D. Hu, H. Huang, X.P. Khotsyanovskii, A.O. Li, X.S. Silva, F.J.G. Yao, S.H. Zheng, H.N. Department of Chemical Materials and Biomolecular Engineering University of Connecticut United States School of Engineering and Applied Science Harvard University United States Department of Mechanical Automotive and Materials Engineering University of Windsor Canada Department of Mechanical Engineering Massachusetts Institute of Technology United States Pisarenko Institute of Problems of Strength National Academy of Sciences of Ukraine Ukraine Mechanical Engineering Department ISEP School of Engineering Polytechnic of Porto Portugal Bachelor Degree Program in Technology Management Chang Jung Christian University Taiwan

The new trends and developments in the novel functional materials and material research innovations presented at the 3rd Global Conference on Materials Science and engineering (CMSE2014), which was held on 20-23 October 2014 in Shanghai, China, is discussed. R. Toyoda, M. Tawata, M. Hashimoto, and Y. Matsumura presented 'Internal stress control of transition-metal thin films', where the effects of ion bombardment parameter Pi on the internal stress of thin films were evaluated. X.G. Wang, Z.L. Chen, and X.Y. Wang presented their study 'Measurement of the interface characteristic based on ultrasonic longitudinal wave', which provided a lucrative alternative to conventional ultrasonic techniques, since it allows one to avoid the mutual superposition of reflected waves at the same thin coating interface. P. Wang and C.Y. Zhao presented their 'Study on reducing railway noise by porous concrete sound-absorbing panel', which is crucial for noise reduction near the railway lines. In the paper entitled 'Numerical study on the heat preservation of the ladle used for twin-roll strip casting', J.H. Dong, M. Chen and N. Wang developed a 3D mathematical model, in order to analyze the heat transfer and temperature drop on the ladle using the finite volume method.

关键词： Finite volume method

来源：评论

学校读者我要写书评

暂无评论

Effects of aluminum content on oxidation behavior of W-Al nanolayer coatings

Effects of aluminum content on oxidation behavior of W-Al na...

引用

International Conference on engineering Tribology Technology, ICETT 2014

作者： Sun-Hui, Yao Shang-Hsien, Hung Yen-Liang, Su Wen-Hsien, Kao Yueh-Feng, Lin Bachelor Degree Program in Technology Management Chang Jung Christian University Kway Jen Tainan71101 Taiwan Department of Mechanical Engineering National Chen Kung University Tainan70101 Taiwan Institute of Mechatronoptic System Chienkuo Technology University Zhanghua50094 Taiwan

ISBN: (纸本)9783038354581

A series of W-Al nanolayer coatings were deposited with varying content of aluminum from 0 at.% to 65 at.% by a unbalanced magnetron (UBM) sputtering system. The as-deposited coatings were investigated first. Then, the coatings were oxidized aiming to study their oxidation behavior. SEM, TEM, XRD, GDOS and nano-hardness tester were used. The results showed that the Al content had a significant effect on the performance of W-Al coatings. The hardness of as-deposited and oxidized coatings decreased with increasing Al content. The pure W coating was heavily oxidized. As the Al content increased, the oxidation decreased fast and then remained stable as the Al content was higher than 45at.%. The effects of formed oxides on hardness were discussed. © 2015 Trans Tech Publications, Switzerland.

关键词： Hardness

来源：评论

学校读者我要写书评

暂无评论

Development of dynamically artificial flowers driven by shape memory alloy and pulse width modulation

Development of dynamically artificial flowers driven by shap...

引用

IEEE Workshop on Advanced Robotics and its Social Impacts, ARSO

作者： C. H. Pan Y. B. Wang H. Y. Pan Department of Mechanical Engineering National Chin-Yi University of Technology Taiwan ROC Institute of Mechanical Engineering National Chiao Tung University Taiwan ROC International Bachelor Degree Program on Energy National Cheng Kung University Taiwan ROC

Artificial flowers are mainly static objects. If we can make them movable with actuating mechanisms, sensors and controllers, this will make them more lively and entertaining. The aim of this paper is to develop artificial flower ornaments with dynamic, modular, programmable and green-energy characteristics. The dynamically artificial flower ornaments show the performances: bending of stems, blooming of petals, spreading of fragrance and flapping of butterflies. Besides, solar power to simulate photosynthesis (it is just an analogy to actual photosynthesis) will be used to energize the dynamically artificial flower ornaments. Instead of using conventional mechanisms and electromagnetic motor to actuate the flower ornaments, we use shape memory alloy (SMA) as actuators and pulse width modulation (PWM) as drive circuit to avoid complication, lager volume and noise generation of the components. Four types of the SMA actuators are made of SMA wire (Ti50%-Ni45%-Cu5%) with one way shape memory effect and 0.6mm in diameter. The performance of each SMA actuator is evaluated. By using PWM, the SMA actuators have high response time and low energy consumption in acting cycle.

关键词： Actuators Shape Pulse width modulation Temperature measurement Wires Robots Force measurement

来源：评论

学校读者我要写书评

暂无评论

Plasma Arc Waste Destruction System (PAWDS) a novel approach to waste elimination aboard ships

引用

NAVAL ENGINEERS JOURNAL 2006年第3期118卷 139-150页

作者： Kaldas, Aida Picard, Isabelle Chronopoulos, Christos Chevalier, Philippe Carabin, Pierre Holcroft, Gillian Alexander, Gary Spezio, Joseph Mann, Jim Molintas, Henry AIDA KALDAS Eng. is the principal author and Technical Manager at PyroGenesis Inc. She is currently leading the process development team of the Plasma Arc Waste Destruction System for applications on board ships. She holds a Bachelor in Chemical Engineering from Cairo University and a Masters in Engineering Science from the University of Western Ontario. She is a member of “l'Ordre des Ingénieurs du Québec” since 1981. Prior to joining PyroGenesis Inc. Mrs. Kaldas has led several development programs working for Orica (formally ICI Explosives)for over 20 years. Her areas of expertise include process optimization and debottlenecking process modeling and particles processing. ISABELLE PICARD ENG. is a Product Development Engineer at PyroGenesis Inc. She is currently part of the process development team of the Plasma Arc Waste Destruction System for applications on board ships. She holds a Bachelor in Chemical Engineering from “école Polytechnique de Montréal”. She is a member of “l'Ordre des Ingénieurs du Québec” since 1995. Prior to joining PyroGenesis Inc. Mrs. Picard has worked as project leader for several development project related to natural gas applications working for The Natural Gas Technologies Center and as Product Development Engineer for the fuel cell industry working for H Power Canada inc. Her areas of expertise include process development and optimization system integration and equipment sizing. CHRISTOS CHRONOPOULOS Eng. is presently a Product Development Engineer at PyroGenesis Inc. Over the last two years Mr. Chronopoulos has worked on the design and development processes for the treatment of all types of wastes. Prior to joining PyroGenesis Inc. Mr. Chronopoulos worked on process engineering and process development in the Fuel Cell industry for a period of two years and also in the Electronic Plating industry for 4 years. He holds a Bachelor's degree in Chemical Engineering from Sherbrooke University. He is a member of “l'Ordre des Ingénieurs du Québec”. PHILIPPE CHEVALIER Eng. is the

The Plasma Arc Waste Destruction System (PAWDS) uses plasma energy, with temperatures over 5,000 degrees C, to rapidly and efficiently destroy combustible waste aboard ships. PAWDS has proven itself to be a viable alternative to traditional incinerators. >> In September 2003, Carnival Cruise Lines were the first to install a PAWDS aboard their 2,056 passenger (plus 1,000 crew members) capacity, M/S Fantasy cruise ship, to treat ship waste including paper, cardboard, plastics, textiles, wood, and food. As of June 2004, it is being operated and maintained solely by Carnival Cruise Lines personnel and has been permitted to operate in port by the Bahamian port authorities. >> The Navy's next generation aircraft carrier, CVN 21, will be equipped with two FAWDS to process all of the non-food combustible solid waste generated with sufficient system redundancy. The US Navy has been jointly developing the PAWDS with PyroGenesis Inc. over the last 6 years. The development efforts in 2004 and 2005 coupled with lessons learned from operation aboard Carnival's cruise ship have resulted in the identification of additional process and design improvements. Source emission testing by an independent laboratory has also demonstrated that the PAWDS easily meets IMO MARPOL requirements for the destruction of solid waste.

关键词： Waste treatment

来源：评论

学校读者我要写书评

暂无评论

Operating speed profiles and the ship design cycle

引用

NAVAL ENGINEERS JOURNAL 2005年第3期117卷 79-85页

作者： Surko, S Osborne, M CDR. Stephen W. Surko USN (ret.) is serving as a principal member of the technical staff of Noesis Inc. He graduated with distinction from the United States Naval Academy in 1982 with a bachelor of science in ocean engineering. Serving as a division officer aboard USS Elliot (DD 967) he enjoyed two WESTPAC deployments and qualified as a surface warfare officer. He completed postgraduate studies at the Massachusetts Institute of Technology in 1988 receiving master of science degrees in naval architecture and marine engineering and mechanical engineering. He earned his professional engineer's license in 1989. Subsequent tours of duty have included: personnel exchange program with Canada's Directorate General Maritime Engineering and Maintenance Philadelphia Naval Shipyard Naval Surface Warfare Center Carderock Division Ship Systems Engineering Station Naval Sea Systems Command Chief of Naval Operations Land Attack Warfare Division and Naval Surface Warfare Center Carderock Division. Steve Surko is an active member of the U.S. Naval Institute and ASNE

One key, but little documented and empirically supported, input in the ship design cycle is the expected operating speed profile. This real-world constraint affects many decisions regarding bull form and power systems, from fuel tanks to main propulsion and ship's service machinery selection and operation. These decisions, in turn, ripple through the design of a ship in ways that are often bard to discern, but clearly impact acquisition and life cycle costs. Recent studies of DDG 51 operating speed profiles demonstrate that the Navy regularly operates with speed profiles considerably different than used to design the ship. In general, warships operate in standard engine order telegraph increments (e.g., Ahead 2/3) and at lower speeds than designed for.

关键词： Ships

来源：评论

学校读者我要写书评

暂无评论

A statistical method for estimating the life expectancy of certain shipboard equipment

引用

NAVAL ENGINEERS JOURNAL 2002年第1期114卷 27-32页

作者： Smith, DE Breslin, DA Toms, GS DENNIS E. SMITH PH.D. is a statistical consultant for Geo-Centers Inc. He received a B.A. in mathe-matics (magna cum laude) from Wabash College and an M.S. in mathematics an M.S. in statistics and a Ph.D. in statistics from the University of Wisconsin. From November 1973 until February 1999 he was President and Principal Statistician at Desmatics Inc. where he participated in a number of studies involving the application of statistical methods to various technical problems in the Navy's environmental-protection and auxiliary-machinery programs. Dr. Smith was instrumental in developing the statistical procedures underlying the Navy's ODS reserve monitoring plan. DAVID A. BRESLIN P.E. is the Director of Technical Operations for the Naval Surface Warfare Center and is the chairperson of ASNE's Committee on Environmental Engineering. He received a master of science degree in aerospace engineering from Virginia Tech a master of engineering administration in indus-trial & systems engineering from Virginia Tech and a bachelor of engineering in mechanical engineering from Stevens Institute of Technology. From 1993 to 1997 he was the program manager of the Naval Sea Systems Command's CFC & Halon Elimination Program and played a critical role in establishing the Navy's strategic reserve of ozone-depleting substances. Because of his many efforts he received a Stratospheric Ozone Protection Award in 1995 from the U.S. Environmental Protection Agency in recogni-tion of “exceptional contributions to global environmental protection”. GREGORY S. TOMS P.E. is the CFC & Halon Elimination Program Manager for the Naval Sea Systems Command (NAVSEA). He received a master of science degree in mechanical engineering from the University of Maryland and a B.S. degree in mechanical engineering from West Virginia University. From 1984 to 1997 he was employed at the Naval Surface Warfare Center Carderock Division Annapolis Detachment (formerly David Taylor Research Center) where he worked on the development of advanced cent

This paper reviews an inexpensive statistical-sampling methodology that can be used to determine the attrition rates of certain types of shipboard equipment. The methodology relies on surveys that are conducted in conjunction with regularly scheduled ship visits over a period of time and a statistical analysis of the survey results. The statistical technique allows for reasonably accurate estimates to be made of attrition rates. The specific example cited in this paper is related to galley-type refrigeration equipment, such as salad chillers, beverage dispensers, et cetera. In the case of galley-type refrigeration equipment, the Navy needs to know whether the Fleet's inventory of equipment relying on Class I Ozone-Depleting Substances (ODSs) will be replaced through natural attrition by the end of fiscal year (FY) 2005, at which time supplies of ODS-based refrigerants will no longer be available for use by ship galleys. This paper outlines the process used to gather data, the analysis of the data, and concludes that the Navy's inventory of galley equipment using Class I ODSs will be replaced through natural attrition by the end of FY05. The methodology reviewed by this paper has wider applications. For various types of shipboard equipment, the methodology can also be used to estimate with reasonable accuracy life expectancies, configurations, conditions, and other items of interest.

关键词： Ship equipment

来源：评论

学校读者我要写书评

暂无评论

Monitoring the navy's strategic reserve of ozone-depleting substances

引用

NAVAL ENGINEERS JOURNAL 2002年第4期114卷 95-104页

作者： Smith, DE Breslin, DA Toms, GS Norton, P DENNIS E. SMITH PH.D. is currently a statistical consultant for GEO-CENTERS INC. He received a B.A. in Mathematics (magna cum laude)from Wabash College and an M.S. in mathematics an M.S. in statistics and a Ph.D. in statistics from the University of Wisconsin. From November 1973 until February 1999 he was president and principal statistician at Desmatics Inc. where he participated in a number of studies involving the application of statistical methods to various technical problems in the Navy's environmental-protection and auxiliary-machinery programs. Dr. Smith was instrumental in developing the statistical procedures underlying the Navy's ODS reserve monitoring plan. DAVID A. BRESLIN P.E. is the director of technical operations for the Naval Surface Warfare Center and chairs the ASNE/SNAME Joint Committee on Environmental Engineering. He received a master of science in aerospace engineering from Virginia Tech a master of engineering administration in industrial and systems engineering from Virginia Tech and a bachelor of engineering in mechanical engineering from Stevens Institute of Technology. From 1993 to 1997 he was the program manager of the Naval Sea Systems Command's CFC and Halon Elimination Program and played a critical role in establishing the Navy's strategic reserve of ozone-depleting substances. Because of his many efforts he received a Stratospheric Ozone Protection Award in 1995 from the U.S. Environmental Protection Agency in recognition of “exceptional contributions to global environmental protection”. GREGORY S. TOMS P.E. is the CFC &Halon Elimination Program Manager for the Naval Sea Systems Command (NAVSEA). He received a master of science degree in mechanical engineering from the University of Maryland and a B.S. degree in mechanical engineering from West Virginia University. From 1984 to 1997 he was employed at the Naval Surface Warfare Center Carderock Division Annapolis Detachment (formerly David Taylor Research Center)where he worked on the development of advanced cent

The domestic production of the most powerful ozone-depleting substances (ODSs) has permanently ceased and the abundant supplies of a number of refrigerants, fire-fighting agents, and solvents, once taken for granted, are now a thing of the past. The Navy has adopted a successful strategy for addressing the threat posed by the unavailability of ODSs. That strategy includes relying on a strategic reserve of ODSs. Considering that the strategic reserve will play a critical role in sustained Fleet operations into the middle of the century, it is important to record the history of the reserve and to document lessons learned in order to educate future generations that may face similar challenges. This is the third of three papers that cover all aspects of the Navy's strategic reserve of ODSs. Breslin (1999) documented the history of the Navy's effort to size, establish, and monitor a reserve designed to support Fleet operations until the middle of the century. Breslin, Smith, and Toms (2000) addressed in detail the process used to estimate the required size of the reserve, including the survey method, statistical analyses, and sizing algorithms. This paper discusses the Navy's plan for monitoring the Navy's strategic reserves of ODSs and describes the methods used in the monitoring process. In particular it discusses the underlying assumptions and statistical techniques associated with the Navy's prediction of the expected drawdown of the reserves. A comparison of actual data, collected since the strategic reserves began operations in 1995, with the predicted reserve drawdown, is included in the paper.

关键词： Marine engineering

来源：评论

学校读者我要写书评

暂无评论

Assuring a sea vehicles science and technology base for transforming the 21st-century Navy

引用

NAVAL ENGINEERS JOURNAL 2002年第3期114卷 103-115页

作者： Metrey, RE Truver, SC Whitman, EC Wright, MA RICHARD E. METREY retired from U.S. government service in January 2001 having served as the director of the Naval Surface Warfare Center Carderock Division and prior to formation of the Carderock Division as the technical director of the David Taylor Research Center for a combined total of 15 years. Prior to serving as the technical director of the David Taylor Research Center Mr. Metrey held key positions in the Navy secretariat among them serving as the deputy assistant secretary of the Navy for surface warfare and the principal advisor to the assistant secretary of the Navy (research engineering and systems). He holds a bachelor of science degree in mechanical engineering from Marquette University Milwaukee Wisconsin and a master of science degree in mechanical engineer-ing from George Washington University Washington D.C. DR. SCOTT C. TRUVER is group vice president National Security Studies Anteon Corporation and directs the Center for Security Strategies and Operations in Anteon's Systems Engineering Group. Since 1972 he has participated in numerous studies for government and private industry in the United States and abroad he has also written extensively for U.S. and foreign publications. He has supported key offices in the Navy Secretariat Office of the Chief of Naval Operations and Headquarters U.S. Marine Corps Navy Systems Commands and laboratories and other Navy and Marine Corps commands and activities. Dr. Truver holds a doctor of philosophy degree in marine policy studies (1978)—the first Ph.D. in this field ever awarded by an institute of higher education—and a master of arts degree in political science and international relations (1974) from the University of Delaware where he held research and university fellowships. He also holds a bachelor of arts degree in political science from Susquehanna University (1972) and is a 1968 graduate of Forrest Sherman High School Naples Italy. DR. EDWARD C. WHITMAN serves as senior advisor science policy in Anteon's Center for Security St

With general agreement among the government and commercial sectors on the importance of maintaining both naval supremacy around the world and viable maritime industries at home, the need for developing a "critical mass" of supporting science and relevant engineering practice should be apparent. Moreover, with increasing calls for "partnership" between government and industry as a key element in revitalizing U.S. shipbuilding, the existing public-sector infrastructure of research and development centers and their associated technology base are unique resources. More urgently, achieving the George W Bush administration's goal for widespread "transformation" of the U.S. armed services - the Navy and Coast Guard among them - will require creating new, innovative technologies to support advanced naval platforms for the agile, survivable, and affordable sea-going forces of the 21st century. These factors create an urgent need to reemphasize the importance of a robust technology base in marine engineening for both national and economic security. This paper reviews the arguments for increasing government support for these important disciplines. It further proposes several alternatives - driven by national economic realities - for collaboration between the public and private sectors in creating and sustaining a focal point for maritime technology at the Carderock Division of the Naval Surface Warfare Center, currently the Navy's "flagship" facility for naval platform architecture and marine systems engineering. In his seminal work, The Influence of Seapower Upon History, Alfred Thayer Mahan traced a clear connection between the sea power of ocean-going nations and their civilian maritime infrastructure-the fishing fleets, merchant marine, shipyards, harbors, port facilities, and experienced manpower that create and maintain traditions of seafaring within the lifeblood of the state. He noted: Seapower in the broad sense... includes not only the military strength afloat that r

关键词：

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：