检索结果-内蒙古大学图书馆

UNITED-STATES-NAVY SHIPBOARD ENERGY R-AND-D - AN OVERVIEW

NAVAL ENGINEERS JOURNAL 1981年第2期93卷 154-161页

作者： KROLICK, CF THE AUTHOR:: received his B.S. degree in Physics from Saint Francis College in 1962 and subsequently his M.S. and Ph.D. degrees in Nuclear Engineering from the University of Maryland in 1969 and 1971. He is the Director of the Navy's Shipboard Energy R&D Program at the David W. Taylor Naval Ship Research and Development Center and has received awards for Outstanding Performance and Sustained Superior Performance. While at the University of Maryland he was recipient of an NSF Fellowship an NDEA Fellowship and an AEC Traineeship. Dr. Krolick is a member of Sigma Xi and the American Nuclear Society.

The U.S. Navy shipboard energy situation is presented both in terms of historical, current, and projected postures. R&D programs to minimize the impact of diminishing fossil fuel resources while ensuring full operational readiness are described. Near term efforts are directed at the achievement of the 1985 Chief of Naval Operations goal of twenty percent reduction in fossil fuel consumption per underway steaming hour, and they are intended primarily for the conventional steam-powered Fleet which presently comprises eighty-four percent on an installed horsepower basis. Longer range efforts attempt to facilitate the goal of a more energy-efficient future Fleet in terms of new construction ships. Alternate Fuels programs are structured to provide a capability to operate on future fuels which are readily available, and they include development of guidelines for the use of a broad range of petroleum-base fuels as well as the qualification of snythetic fuels derived from coal, oil shale, and tar sands.

关键词：

来源：评论

学校读者我要写书评

暂无评论

BANQUET ADDRESS - TECHNOLOGY IS FUN, ITS THE OTHER THINGS

引用

NAVAL ENGINEERS JOURNAL 1981年第3期93卷 57-59页

作者： FROSCH, RA President American Association of Engineering Societies Inc Dr. Robert A. Frosch born in New York City on 22 May 1928 attended Columbia University from which he received his B.A. degree in 1947 his M.A. degree in 1949 and his Ph.D. degree in 1952 all in the field of Theoretical Physics. While completing his studies for his doctorate he joined Columbia's Hudson Laboratories in 1951 and worked on naval research projects as a Research Scientist until 1958 when he became the Director Hudson Laboratories a post he held until 1963. From 1965 to 1966 he was Deputy Director Advanced Research Projects Agency (APRA) Department of Defense (DOD) having first joined ARPA in 1963 as the Director for Nuclear Test Detection the position he held until 1965. Since 1969 he also has served as the DOD member of the Committee for Policy Review National Council of Marine Resources and Engineering Development and in 1967 and 1970 as the Chairman of the U.S. Delegation to the Intergovernmental Oceanographic Commission meetings at UNESCO in Paris. In addition he was the Assistant Secretary of the Navy for Research & Development from 1966 to 1973 Assistant Executive Director of the United Nations Environment Program with the rank of Assistant Secretary General of the United Nations from 1973 to 1975 and Assistant Director for Applied Oceanography at the Woods Hole Oceanographic Institution from 1975 until mid-1977. In June 1977 he became the Administrator of the National Aeronautics and Space Agency (NASA) the position he held prior to joining the American Association of Engineering Societies (AAES) Incorporated. On 20 January 1981 he was elected to his present post as President AAES. Additionally he was the Sea Grant Lecturer for the Massachusetts Institute of Technology in 1974 and currently is a National Lecturer for Sigma Xi. During his distinguished career Dr. Frosch has been the recipient of numerous awards among which are the Arthur S. Flemming Award in 1966 the Navy Distinguished Public Service Award in 1

来源：评论

学校读者我要写书评

暂无评论

Σ Oscillations and Spin Change during Charge Exchange in Ar+ on Ar

引用

Physical Review Letters 1980年第19期44卷 1247-1247页

作者： K. B. McAfee, Jr. R. S. Hozack R. E. Johnson Engineering Physics Program University of Virginia Charlottsville Virginia 22901

This Letter reports a first measurement of the fast oscillations in Ar+ on Ar charge-transfer collisions. The high resolution needed to observe these oscillations is obtained with use of crossed ion and atom beams. The observed frequency is very different from that calculated from available Ar2+ potentials. The difference is attributed to spin change between the fine-structure levels of Ar+.

关键词：

来源：评论

学校读者我要写书评

暂无评论

NON-LINEAR WHEELSET FORCES IN FLANGE CONTACT .1. STEADY-STATE ANALYSIS AND NUMERICAL RESULTS

引用

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME 1979年第3期101卷 238-246页

作者： SWEET, LM SIVAK, JA Transportation Program Department of Mechanical and Aerospace Engineering Princeton University Princeton N.J. 08540 Princeton University Princeton N.J. Applied Physics Laboratory Johns Hopkins University Baltimore Md. 21205

A theoretical model for steady-state wheelset force/displacement relations in tread and flange contact is presented. The analysis includes nonlinear geometric constraints that characterize wheel/rail contact, creep forces in the contact plane due to wheel/rail differential velocities, limits on adhesion at each contact point, and equilibrium conditions applied to the wheelset body forces. Results are summarized as the resultant lateral force and yaw moment acting on the wheelset as functions of lateral position and yaw angle. The results of this analysis, verified experimentally in Part 2 of this paper, are important to the analysis of wheelset response to track inputs, curving performance, and wheelclimb derailment.

关键词： Yaw Creep Flanges Wheelsets Adhesion Displacement Equilibrium (physics) Wheels Steady state Rails

来源：评论

学校读者我要写书评

暂无评论

NON-LINEAR WHEELSET FORCES IN FLANGE CONTACT .2. MEASUREMENTS USING DYNAMICALLY SCALED MODELS

引用

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME 1979年第3期101卷 247-255页

作者： SWEET, LM SIVAK, JA PUTMAN, WF Transportation Program Department of Mechanical and Aerospace Engineering Princeton University Princeton N.J. 08540 Princeton University Princeton N.J. Applied Physics Laboratory Johns Hopkins University Baltimore Maryland 21205 Department of Mechanical and Aerospace Engineering Princeton University Princeton N.J. 08540

This paper presents new experimental methods for the study of rail vehicle dynamics through the use of scaled models on tangent track, and the application of these techniques to the measurement of nonlinear wheelset force/displacement relations in steady-state. These relations are important to the analysis of wheelset response to track inputs, curving performance of trucks, and wheelclimb derailment. A one-fifth scale model instrumented wheelset with new wheel profiles is used, with similitude scaling of the contact forces achieved through use of a polycarbonate resin for the contact surfaces. Data are presented for wheelset lateral force and yaw moment for the nonlinear range of wheelset lateral displacements and yaw angles, including flange contact. The measured data validate the analytical model presented in Part 1 of this paper, based on nonlinear wheel/rail contact geometry, creep forces with adhesion limits, and wheelset kinematics. A criterion for wheelclimb derailment is presented and verified experimentally.

关键词： Yaw Creep Trucks Flanges Wheelsets Rail vehicles Adhesion Displacement Dynamics (Mechanics) Kinematics Resins Wheels Experimental methods Steady state Rails Geometry

来源：评论

学校读者我要写书评

暂无评论

DESIGN, CONSTRUCTION, AND MODERNIZATION OF SHIPS WITH THE SHIPBOARD DATA MULTIPLEX SYSTEM (SDMS)

引用

NAVAL ENGINEERS JOURNAL 1979年第5期91卷 65-73页

作者： BOLD, NT BOURETTE, AP Dr. Norbert T. Bold graduated from Marquette University and later received his M.S. and Ph.D. degrees in Electrical Engineering from Northwestern University. He served three years as a Naval Engineering Officer aboard an Aircraft Carrier and a Minesweeper and has nineteen years technical experience in shipboard navigation underwater target and SDMS projects for the Navy. He is currently a Program Manager in the Autonetics Marine Systems Division Rockwell International where his primary assignment is the development of advanced concepts and applications of SDMS to Navy programs. He has published several technical papers. was elected to four Scholastic Honorary Societies and was the recipient of a NROTC Scholarship. Mr. A.P. Bourette Manager Systems Applications Autonetics Marine Systems Division. received his B.S. degree in Mathematical Physics from Long Beach State University. He began his career with a Computer Analysis Unit. performing tasks related to computer application. programming and interfacing. He has made significant contributions to the Central Computer Complex approach adopted for the SSN-688 Combat System and has performed inertial systems engineering efforts on the MK2 SINS for the POSEIDON Program. He spent some time in the Washington D.C. area providing technical expertise to various Navy organizations. Upon his return he soon was selected to manage the Systems Applications organization at Rockwell International. This organization is primarily responsible for the Shipboard Application of SDMS. He has directed several application studies showing the significant advantages associated with multiplexing. Recently. he provided the technical direction for the FY80 SSN SDMS Preliminary Design Phase.

Rockwell International is currently under Navy contract to fabricate the engineering Development Model (EDM) of the Shipboard Data Multiplex System (SDMS) for general data transfer aboard surface ships and submarines. The application of SDMS significantly reduces hardware such as cables, switchboards, and Signal Data Converters (SDC), and it provides the capability to add many desired features which are currently not practicable. In applying SDMS to a specific ship, a massive amount of signal data must be considered. The Application Design Automation program (ADAP) is a set of computer programs that have been developed to accomplish this task. ADAP com bines signal population data, ships configuration data, and SDMS hardware characteristics to produce an SDMS configuration layout together with documentation necessary to analyze, evaluate, and implement the system. Specific outputs include hardware requirements, system layout, and interface requirements including wire list information. The Timing, Event and Load Simulation (TELS) program simulates SDMS and provides performance data (system capacity, throughput rate, transport delays) for any system configuration. Conventional SDCs can be elimianted from Navy shipboard systems when SDMS is used. SDMS provides the necessary data distribution, signal conversion, and computer interface. In addition, many functions of the conventional switchboards can be performed within SDMS, thus reducing the size or eliminating conventional switchboards. Very small switch-bomb will provide the necessary control of data distribution. With SDMS, an automatic and continuous Noise and Vibration Monitoring (NVM) capability is readily available. The automated NVM function will enhance the safety, operation, and maintenance of the ship. Problems with machinery or excessive self-noise generation will be detected much sooner, and corrective action implemented on a timely basis.

关键词：

来源：评论

学校读者我要写书评

暂无评论

WEIGHT DISTRIBUTION CATEGORIZATION FOR MILITARY VEHICLES

引用

NAVAL ENGINEERS JOURNAL 1978年第6期90卷 67-72页

作者： TEITLER, S PROODIAN, RE Dr. Sidney Teitler after receiving his Ph.D. in Physics from Syracuse University joined the Staff of the Naval Research Laboratory (NRL) where he carried out studies in various areas of experimental and theoretical Physics. He is a Fellow of the American Physical Society and from 1966 until 1967 spent a Sabbatical Leave at the Niels Bohr Institute in Copenhagen. Denmark. At present he divides his time between technical and management activities as Head of the Program and Resource Analysis Office at NRL. Mr. Robert E. Proodianreceived his BS degree in Plastics Technology from the Lowell Technological Institute and is currently enrolled in the Graduate School (Center for Technology and Administration) at The American University. He joined the Non—Metallic Materials Branch of the Naval Ship Engineering Center (NAVSEC) in 1968 where he was engaged in the technical management of R&D for new polymer systems for the Navy. In 1974 he joined NRL as a Program Liaison Officer for the Chemistry Division and in 1976 he was transferred to his present position in the Laboratory's Program and Resource Analysis Office.

The paper presents a compact method for displaying vehicle weight distributions and utilizes this in a discussion of design “trade—offs” for military vehicles.

关键词：

来源：评论

学校读者我要写书评

暂无评论

THE USE OF MAINTENANCE DATA TO IMPROVE FLEET MAINTENANCE PRACTICES

引用

Naval Engineers Journal 1978年第6期90卷 25-36页

作者： REINES, J. MCCORMICK, J.P. Mr. J. Reinesis a Program Manager with ARINC Research Corporation an Annapolis Md. based consulting engineering corporation where in addition to management of DDEOC development he is responsible for the acquisition and direction of the Company's work in support of operational ships and ship systems. Before joining ARINC Research he worked for the newly formed Litton Advanced Marine Technology Division. where as Manager System Engineering and Analysis and Director System Assurance he had responsibilities in a variety of areas including Reliability Maintainability Human. Engineering System Safety Operations Analysis and the operational and maintenance training of LHA I and DD 963 Class Navy crews. Mr. Reines received his BS degree from Columbia University in 1951 after his service in the U.S. Navy as an Aviation Machinist Mate/Combat Air Crewman. During his 27–year career since then he has worked in the automotive and aerospace industries and as a Consultant to industry and the military. Mr. John P. McCormickis a Principal Engineer and Group Manager in ARINC Research Corporation's Ships and Ordnance Division. He has been with ARINC Research since 1963 when he joined the Company to participate in reliability studies of NASA's SATURN Launch Vehicle. He was Project Leader of a comprehensive study of the Air Force Jet Engine Maintenance Management Program has conducted a number of studies involving the use of Army Maintenance Data and has considerable experience in the use and analysis of Navy Maintenance Data. Currently he is managing a number of projects involving the analysis of Navy Destroyer and Submarine Maintenance Information. Mr. McCormick received his BS degree in Physics from St. Bonaventure University in 1959. after which he was employed by the U.S. Naval Propellant Plant as an Internal Ballistics Specialist.

The purpose of this paper is to explain and demonstrate the value of using historical Navy maintenance data in analyses for developing improved Fleet maintenance practices. The Navy produces great volumes of maintenance and maintenance—related data on its ships, ship systems, and equipments. Analyses of these data by persons familiar with the intricacies of the data and the systems involved can provide the information and insight needed to evaluate present practices and develop improved Fleet maintenance. This paper identifies specific data elements, together with their sources, that have proven to be most useful. Capabilities of the data are highlighted, and the general analysis approach is described. A number of case studies are presented to trace the use of various data elements from their source, through analysis, to the requirements for improved maintenance practices. © 1978 American Society of Naval Engineers

关键词：

来源：评论

学校读者我要写书评

暂无评论

ANTENNA PROPERTIES OF PROBES USED IN ION-ACOUSTIC-WAVE EXPERIMENTS

引用

RADIO SCIENCE 1977年第6期12卷 935-939页

作者： CHRISTENSEN, T HERSHKOWITZ, N SCHELLER, A LONNGREN, KE The University of Iowa Iowa City Iowa 52242 Department of Physics and Astronomy. Program of Electrical and Computer Engineering.

This paper describes a series of experiments designed to examine the antenna characteristics of probes which are used as detectors in ion-acoustic wave experiments. Reception patterns are measured which are in qualitative agreement with theoretical predictions. The near-field antenna pattern of the wave-launching grid is found to be important.

关键词： Probes Antenna measurements Plasmas Antenna radiation patterns Dipole antennas Receiving antennas

来源：评论

学校读者我要写书评

暂无评论

Binary-encounter stopping cross sections. III. Straggling and screening

引用

Physical Review A 1977年第4期16卷 1432-1432页

作者： R. E. Johnson A. M. Gooray Engineering Physics Program University of Virginia Charlottesville Virginia 22901

A previously developed binary-encounter model describing the slowing down of energetic heavy charged particles over a broad range of incident-particle energies is employed to calculate energy straggling as a function of target Z2 for incident helium and hydrogen. This model seriously overestimates the measured stopping cross sections at high incident-particle energy for helium on heavy target atoms, but appears to yield more reasonable results for energy straggling. The large results in the stopping calculation are attributed to the neglect of the distortion of the electron charge cloud during the collision. A screened interaction, based on screening in a free-electron gas, is employed to estimate the size of the effect on both the stopping and straggling results for 10-MeV incident He++ on target atoms 1≤Z2≤36, and for equilibrium-charge-state beams of hydrogen at energies 1 keV to 1 MeV on a number of targets. It was found that the neglect of distortion may result in errors equivalent to or greater than those due to the neglect of the long-range dipole interactions when estimating S, particularly at higher energies. For the straggling calculation both of these effects result in considerably smaller correction to the binary-encounter method.

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：