检索结果-内蒙古大学图书馆

UTILIZING RESERVE ASSETS - MUTUAL SUPPORT AT SUPSHIP BATH

NAVAL engineerS JOURNAL 1993年第6期105卷 39-42页

作者： GOLDA, EM PORPORA, GA Cdr. Eugene Michael Golda:is a Naval Reserve engineering duty officer and is commanding officer of NR NavSea PMS Det 302. He has developed and directed mutual support programs assisting the Supervisor of Shipbuilding Brooklyn and has participated in the training and mutual support programs at the Supervisor of Shipbuilding Bath. He received a Ph.D. and M.S. in materials science and engineering from Stevens Institute of Technology Hoboken N.J. A 1977 graduate of the United States Naval Academy Cdr. Golda has been a member of ASNE since 1974. Cdr. Golda is a materials engineer at the Annapolis Detachment Carderock Division Naval Surface Warfare Center working on naval applications of superconducting technology. LCdr. Gregory A. Porpora:is an IBM market support representative who provides technical consulting support in application development with computer aided software engineering (CASE) tools. Prior to joining IBM he was a senior design engineer for a defense contractor involved in design and development of radar and ASW systems including the AN/BSY-1 combat system trainer. LCdr. Porpora is a member of IEEE the Naval Institute and the Naval Reserve Association. He holds a BSEE and MSEE from the Polytechnic Institute of Technology New York. LCdr. Porpora is currently assigned to NR SupShip Det 502 which provides extensive mutual support for the Supervisor of Shipbuilding Bath and the resident office in Brooklyn New York.

来源：评论

学校读者我要写书评

暂无评论

Enhancement Of Memory Capacity Of Neural Networks

Enhancement Of Memory Capacity Of Neural Networks

引用

IEEE International Workshop on Intelligent Robots and systems (IROS)

作者： D.Y. Chao D.T. Wang Institute of Integrated System Research Department of Computer and Information Science New Jersey Institute of Technology Newark NJ USA

来源：评论

学校读者我要写书评

暂无评论

Non-contact magnetic gear for micro transmission mechanism

Non-contact magnetic gear for micro transmission mechanism

引用

IEEE International Conference on Micro Electro Mechanical systems

作者： K. Ikuta S. Makita S. Arimoto Department of Mechanical System Engineering Faculty of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan Department of Mathematical Engineering and Information Physics Faculty of Engineering University of Tokyo Hongo Tokyo Japan

A unique transmission mechanism using a non-contact magnetic gear (NCMG) is proposed for micro and miniature electromechanical systems. A miniature NCMG has been produced and the basic characteristics were evaluated experimentally. The theoretical approach for analyzing the transmittable torque of the NCMG was developed and verified experimentally. It is concluded that the NCMG system has great potential for use in safe miniature transmission mechanisms for medical applications and in micro transmission systems for microelectromechanical systems.< >

关键词： Gears Torque Friction Energy loss Magnetic levitation systems engineering and theory Magnetic analysis Safety Machining Magnetic forces

来源：评论

学校读者我要写书评

暂无评论

FULL-WAVE SOLUTION OF DIELECTRIC LOADED WAVE-GUIDES AND SHIELDED MICROSTRIPS UTILIZING FINITE-DIFFERENCE AND THE CONJUGATE-GRADIENT METHOD

引用

INTERNATIONAL JOURNAL OF MICROWAVE AND MILLIMETER-WAVE computer-AIDED engineerING 1991年第4期1卷 346-357页

作者： NARAYANAN, V MANELA, M LADE, RK SARKAR, TK Department of Electrical and Computer Engineering Syracuse University Syracuse New York 13244-1240 Viswanathan Narayanan was born in Bangalore India on December 14 1965. He received the BE degree in Electronics and Communications from B.M.S. College of Engineering Bangalore in 1988. He joined the Department of Electrical Engineering at Syracuse University for his graduate studies in 1989 where he is currently a research assistant. His research interests are in microwave measurements numerical electromagnetics and signal processing. Biographies and photos are not available for M. Manela and R. K. Lade. Tapan K. Sarkar (Sf69-M'76-SM'X1) was born in Calcutta. India on August 2 1948. He received the BTech degree from the Indian Institute of Technology Kharagpur India in 1969 the MScE degree from the University of New Brunswick Fredericton Canada in 1971. and the MS and PhD degrees from Syracuse University. Syracuse NY in 1975. From 1975-1976 he was with the TACO Division of the General Instruments Corporation. He was with the Rochester Institute of Technology (Rochester NY) from 1976-1985. He was a Research Fellow at the Gordon Mckay Laboratory Harvard University Cambridge MA from 1977 to 1978. He is now a Professor in the Department of Electrical and Computer Engineering Syracuse University. His current research interests deal with numerical solutions of operator equations arising in electromagnetics and signal processing with application to system design. He obtained one of the “ best solution” awards in May 1977 at the Rome Air Development Center (RADC) Spectral Estimation Workshop. He has authored or coauthored more than 154 journal articles and conference papers and has written chapters in eight books. Dr. Sarkar is a registered professional engineer in the state of New York. He received the Best Paper Award of the IEEE Transactions on Electromagnetic Compatibility in 1979. He was an Associate Editor for feature articles of the lEEE Antennas arid Propagation Sociefy Newsletter and was

Dynamic analysis of waveguide structures containing dielectric and metal strips is presented. The analysis utilizes a finite difference frequency domain procedure to reduce the problem to a symmetric matrix eigenvalue problem. Since the matrix is also sparse, the eigenvalue problem can be solved quickly and efficiently using the conjugate gradient method resulting in considerable savings in computer storage and time. Comparison is made with the analytical solution for the loaded dielectric waveguide case. For the microstrip case, we get both waveguide modes and quasi-TEM modes. The quasi-TEM modes in the limit of zero frequency are checked with the static analysis which also uses finite difference. Some of the quasi-TEM modes are spurious. This article describes their origin and discusses how to eliminate them. Numerical results are presented to illustrate the principles.

关键词： Waveguides

来源：评论

学校读者我要写书评

暂无评论

MAGNETOHYDRODYNAMIC SUBMARINE PROPULSION systemS

引用

NAVAL engineerS JOURNAL 1991年第3期103卷 141-157页

作者： SWALLOM, DW SADOVNIK, I GIBBS, JS GUROL, H NGUYEN, LV VANDENBERGH, HH Daniel W. Swallomis the director of military power systems at Avco Research Laboratory Inc. a subsidiary of Textron Inc. in Everett Mass. Dr. Swallom received his B.S. M.S. and Ph.D. degrees in mechanical engineering from the University of Iowa Iowa City Iowa in 1969 1970 and 1972 respectively. He has authored numerous papers in the areas of power propulsion and plasma physics and currently is a member of the Aerospace Power Systems Technical Committee of the AIAA. Dr. Swallom has directed various programs for the development of advanced power generation systems lightweight power conditioning systems and advanced propulsion systems for marine applications. His previous experience includes work with Odin International Corporation Maxwell Laboratories Inc. Argonne National Laboratory and the Air Force Aero Propulsion Laboratory. Currently Dr. Swallom is directing the technical efforts to apply magnetohydrodynamic principles to a variety of propulsion and power applications for various marine vehicles and power system requirements respectively. Isaac Sadovnikis a principal research engineer in the Energy Technology Office at Avco Research Laboratory Inc. a subsidiary of Textron Inc. He received his B.S. in engineering (1974) B.S. in physics (1975) M.S. in aeronautics and astronautics (1976) and Ph.D. in physics of fluids (1981) at the Massachusetts Institute of Technology. Dr. Sadovnik has been involved in research work funded by DARPA concerning the use of magnetohydrodynamics for underwater propulsion. He has built theoretical models that predict the hydrodynamic behavior of seawater flow through magnetohydrodynamic ducts and their interaction with the rest of the vehicle (thrust and drag produced). In addition Dr. Sadovnik has been involved in research investigations geared toward the NASP program concerning the use of magnetohydrodynamic combustion-driven accelerator channels. Prior to joining Avco Dr. Sadovnik was a research assistant at MIT where he conducted experimental and

Magnetohydrodynamic propulsion systems for submarines offer several significant advantages over conventional propeller propulsion systems. These advantages include the potential for greater stealth characteristics, increased maneuverability, enhanced survivability, elimination of cavitation limits, greater payload capability, and the addition of a significant emergency propulsion system. These advantages can be obtained with a magnetohydrodynamic propulsion system that is neutrally bouyant and can operate with the existing submarine propulsion system power plant. A thorough investigation of magnetohydrodynamic propulsion systems for submarine applications has been completed. During the investigation, a number of geometric configurations were examined. Each of these configurations and mounting concepts was optimized for maximum performance for a generic attack class submarine. The optimization considered each thruster individually by determining the optimum operating characteristics for each one and accepting only those thrusters that result in a neutrally buoyant propulsion system. The results of this detailed optimization study show that the segmented, annular thruster is the concept with the highest performance levels and greatest efficiency and offers the greatest potential for a practical magnetohydrodynamic propulsion system for attack class submarines. The optimization study results were used to develop a specific point design for a segmented, annular magnetohydrodynamic thruster for an attack class submarine. The design point case has shown that this thruster may be able to provide the necessary thrust to propel an attack class submarine at the required velocity with the potential for a substantial acoustic signature reduction within the constraints of the existing submarine power plant and the maintenance of neutral buoyancy. This innovative magnetohydrodynamic propulsion system offers an approach for submarine propulsion that can be an important contributio

关键词： Ship Propulsion

来源：评论

学校读者我要写书评

暂无评论

Development of micro actuator using shape memory alloy thin film

Development of micro actuator using shape memory alloy thin ...

引用

1990 IEEE International Workshop on Intelligent Robots and systems, IROS 1990

作者： Ikuta, Koji Fujita, Hiroyuki Arimoto, Suguru Ikeda, Michiaki Yamashita, Shinji Department of Mechanical System Engineering Faculty of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Iizuka820 Japan Institute of Industrial Science University of Tokyo Roppongi Minato-ku Tokyo106 Japan Department of Mathematical Engineering and Information Physics Faculty of Engineering University of Tokyo Hongo Bunkyo-ku Tokyo113 Japan Research Laboratory Yaskawa Electric Mfg. Co. Ltd. Yahatanishi-ku Kitakyushu806 Japan

Basic research for the micro actuator using TiNi Shape Memory Alloy (SMA) is conducted from the crystallographic point of view. SMA (TiNi) thin film is fabricated by sputtering deposition. First, the influence of substrate temperature on crystal structure is verified by measuring resistivity-temperature curve and X-ray diffraction. Though high temperature substrate condition makes TiNi film in regular crystal, amorphous structure appears at low substrate temperature. Next, Optimal composition of sputtered SMA thin film is found by SSQ and negative slope of the resistivity curve due to phase transformation between R-phase and parent phase is observed. Finally, annealing methods is examined to crystalize amorphous TiNi. © 1990 institute of Electrical and Electronics engineers Inc.. All rights reserved.

关键词： Crystal structure

来源：评论

学校读者我要写书评

暂无评论

Development of micro actuator using shape memory alloy thin film

Development of micro actuator using shape memory alloy thin ...

引用

EEE International Workshop on Intelligent Robots and systems, Towards a New Frontier of Applications

作者： K. Ikuta H. Fujita S. Arimoto M. Ikeda S. Yamashita Department of Mechanical System Engineering Faculty of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan Institute of Industrial Science University of Tokyo Tokyo Japan Department of Mathematical Engineering and Information Physics Faculty of Engineering University of Tokyo Tokyo Japan Research Laboratory Yaskawa Electric Manufacturing Company Limited Japan

Basic research for the micro actuator using TiNi shape memory alloy (SMA) is conducted from the crystallographic point of view. SMA (TiNi) thin film is fabricated by sputter deposition. First, the influence of substrate temperature on crystal structure is verified by measuring resistivity-temperature curve and X-ray diffraction. Though high temperature substrate conditions make TiNi film in regular crystal, an amorphous structure appears at low substrate temperature. Next optimal composition of sputtered SMA thin film is found by SSQ. The negative slope of the resistivity curve due to phase transformation between R-phase and parent phase is observed. Finally, annealing methods are examined to crystallize amorphous TiNi.< >

关键词： Microactuators Shape memory alloys Transistors Sputtering Substrates Temperature Crystallization Amorphous materials Crystallography X-ray diffraction

来源：评论

学校读者我要写书评

暂无评论

computer-AIDED-DESIGN METHODS FOR PROPELLER FILLET GAUGES

引用

NAVAL engineerS JOURNAL 1990年第3期102卷 202-208页

作者： ALLEN, DW VINOSKI, WS OVERTON, BA David W. Allen:is a senior computer scientist at the Machinery Technology Division Westinghouse Electric Corporation Large Pa. He received the B.A. degree in mathematics from Grinnell College and the M.S. degree in computer science from the University of Pittsburgh. His career with Westinghouse has been divided between assignments in engineering and computer applications. Mr. Allen has published eight technical papers. He received the George Westinghouse Signature A ward of Excellence for his work on the development of the GAGES computer program for designing propeller gages. He is a member of the Association for Computing Machinery (ACM) and the Institute of Electrical and Electronics Engineers (IEEE). Walter S. Vinoski:is a project engineer at the Machinery Technology Division Westinghouse Electric Corporation Large Pa. and was instrumental in the development of the GAGES computer program. He was awarded the George Westinghouse Signature Award of Excellence for his work on the GAGES program. Mr. Vinoski has six years of marine propulsion system experience specifically with propellers. He earned a B.S. degree in electronics engineering and minored in mathematics at the Ohio Institute of Technology. He is a member of the American Society of Naval Engineers. Bernard A. Overton:graduated from North Carolina Agricultural and Technical State University Greensboro N.C. in 1958 with a B.S. degree in mechanical engineering. Within two years of joining the U.S. Army Mr. Overton was honorably discharged as a first lieutenant. Mr. Overton worked seven years at Philadelphia Naval Shipyard in the following areas: shafting shafting alignment bearing reactions noise and vibration surveys propellers and propeller blade gage designs. In 1967 Mr. Overton transferred to the Navy Engineering Center. He has worked on main propulsion devices such as water jets propellers (both submarine and surface ship) and propeller blade gages. Mr. Overton was responsible for the establishment of the Naval Inspectors Propeller Certif

One of the most complicated forms encountered in engineering design is that of the marine propeller. The complexities arise from the complicated hydrodynamic surfaces of the propeller blades and the complicated manner in which the blades are oriented with and attached to the hub. Where propeller blades are attached to the hub, the blade shape is blended into the shape of the hub. The geometry of this region is particularly complicated. The shape of the blend is called a fillet, and the blending region is called the fillet region. Sheet metal gages conforming to various blade surface contours are used in the manufacture and inspection of propellers. Five different types of gages define the shape of the propeller in different regions. Fillet gages are such gages that define the shape of propeller blades in the fillet region. This paper describes a new computer-aided method for designing fillet gages. Previous methods of fillet gage design required the designer to follow a complicated layout procedure of determining where a particular unfilleted blade contour intersected the hub. The design of the fillet was then done in another layout procedure. Newly developed numerical procedures incorporated in a computer program have reduced the time required to design a complete set of gages (including fillet gages) from up to several weeks to hours.

关键词： Propellers

来源：评论

学校读者我要写书评

暂无评论

Printed circuit board inspection system PI/1 2

Printed circuit board inspection system PI/1

引用

Automated Inspection and High-Speed Vision Architectures II 1988

作者： Yu, Shiaw-Shian Cheng, Wen-Chin Chiang, Chris S. C. Advanced Technology Center Electronics Research and Service Organization Industrial Technology Research Institute Chutung Hsinchu31015 Taiwan Control System Department Electronics Research and Service Organization Industrial Technology Research Institute Chutung Hsinchu31015 Taiwan Institute of Computer Science and Information Engineering National Chiao Tung University Hsinchu30049 Taiwan AITech International Corporation United States

An automatic printed circuit board (PCB) inspection system called PI/l, is described in this paper. The system can inspect PCB artwork and inner layers to find trace faults such as open circuits, short circuits, pin holes, fine lines and narrow line spaces. PI/1 uses a line scan camera with 1024 pixels resolution to take images. The whole image can be obtained by the help of a scanning mechanism in the X and the Y directions. Continuous pictures can be taken without blurring, and the resolution is between 1/2 to 2 mils. The inspection method used in PI/1 is a type of design rule checking. It does not require a reference image and can tolerate changes in the inspection environment due to illumination and PCB positioning. The inspection algorithm has been implemented into a special hardware and the inspection speed is about 4 x 106 pixels/sec. © 1989 SPIE. All rights reserved.

关键词： Printed circuit boards

来源：评论

学校读者我要写书评

暂无评论

IMAGE-ENHANCEMENT BY PATH PARTITIONING

IMAGE-ENHANCEMENT BY PATH PARTITIONING

引用

SATELLITE CONF AT THE 1988 BIANNUAL INTERNATIONAL CONF ON PATTERN RECOGNITION : RECENT ISSUES IN PATTERN ANALYSIS AND RECOGNITION

作者： LUCERTINI, M PERL, Y SIMEONE, B Dept. Electrical Engineering University of Roma “Tor Vergata” via O. Raimondo Roma 00173 Italy Institute for Integrated System Computer and Information Science Dept. New Jersey Inst. of Technology Newark 07102 NJ United States Dept. of Statistics University of Roma “La Sapienza” Piazza A.Moro 5 Roma 00185 Italy

ISBN: (纸本)0387518150

Image segmentation can be a useful tool in facing image degradation. In image segmentation the input is a set of pixels with given grey levels and the output is a partition of the set of pixels into connected regions ("classes"), so that a given set of requirements on the single classes and on adjacent classes is satisfied (i.e. pixels belonging to the same class must have approximately the same grey levels or the same textures and pixels belonging to adjacent classes must have significantly different grey levels or different textures). Once segmentation has been performed, the same grey level is associated with each pixel of the same class. The grey level can either be related to the original grey levels of the class, or can be given by a new grey scale on the ground of contrast optimization criteria. The segmentation technique proposed in this presentation is a method for finding the most homogeneous classes and the best possible contrast in a row by row image processing. In partitioning each row of the image, we have two aims: the partition must be as good as possible in its own right, and it must be as compatible as possible with the partitions of the other rows. If we take into account the two aims simultaneously, then the solution procedure becomes complex. To simplify and speed-up the procedure, we can partition each row independently, and then we can apply region merging techniques to the resulting set of row partitions. In the presentation the problem is formulated as a path partitioning one and a simple O(n p) row-partitioning algorithm based on a shortest path formulation of the problem is given. © 1989, Springer-Verlag.

关键词： Pixels

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：