检索结果-内蒙古大学图书馆

SSRN 2024年

作者： Saito, Yuichi Ichinose, Yusaku Sato, Toshihisa Itoh, Makoto Institute of Systems and Information Engineering University of Tsukuba Ibaraki Tsukuba305-8573 Japan Center for Artificial Intelligence Research University of Tsukuba Ibaraki Tsukuba305-8573 Japan Degree Programs of Systems and Information Engineering University of Tsukuba Ibaraki Tsukuba305-8573 Japan The National Institute of Advanced Industrial Science and Technology Ibaraki Tsukuba305-8560 Japan Graduate School of Systems and Information Engineering Japan

In conditional driving automation, which allows drivers to be engaged in nondriving activities, a control transition from automation to the driver is required when automation cannot handle the situation safely. Considerable research has been conducted on automation-initiated driver-control strategies that restore drivers to the control loop. However, there is a lack of research on achieving driver-initiated driver control (DIDC) transitions, where drivers deactivate the automated driving mode at their initiative and pace prior to a take-over request. This study proposes a DIDC strategy with a take-over recommendation rather than a request for action selection: ``I recommend that you deactivate the automated driving mode.'' We investigated the effect of the proposed DIDC strategy on the take-over time and vehicle control performance in scheduled take-overs. A scheduled take-over scenario (i.e., approaching a traffic accident site) was designed with a driving simulator. We explored message contents that could achieve DIDC transition: 1) no situational message, 2) situational message, 3) situational message with a monitoring request, and 4) situational message with a take-over recommendation. Thirty nine drivers participated in our driving simulation experiment for a 21-min drive on a highway. This study found that with the take-over recommendation, the drivers stayed longer with their hands on the steering wheel, focused on the road ahead, and deactivated the automated driving mode by themselves. When achieving DIDC transition, the vehicle control performance was safer in avoiding obstacles. The proposed take-over recommendation system is helpful for drivers to deactivate automated driving modes at their initiative and pace. However, this strategy did not necessarily result in DIDC transition. One challenge is designing escalation steps that accelerate the formation of human–automation intentions to deactivate the automated driving mode at their initiative and pace. ©

关键词： Automation

来源：评论

学校读者我要写书评

暂无评论

Task Difficulty, Risk Feeling, and Safety Margin in the Determination of Vehicle Speed to Prepare for Traffic Conflicts

SSRN

引用

SSRN 2023年

作者： Kochi, Fuma Saito, Yuichi Uchida, Nobuyuki Itoh, Makoto Degree Programs of Systems and Information Engineering University of Tsukuba Ibaraki Tsukuba305-8573 Japan Institute of Systems and Information Engineering University of Tsukuba Ibaraki Tsukuba305-8573 Japan Center for Artificial Intelligence Research University of Tsukuba Ibaraki Tsukuba305-8573 Japan Japan Automobile Research Institute Ibaraki Tsukuba305-0822 Japan

Near-misses or crashes at intersections result from traffic conflicts, in which two road users approach each other owing to poor visibility. A good understanding of the motivational determinants and perceptual processes that determine drivers' hazard-anticipatory behavior is important for designing effective measures to assist drivers' cognitive processes. This study aimed to reveal the motivational determinants of behavior and to explore what information would drivers perceive when approaching blind intersections. We posit that the motivational determinant of behavior would be a safety margin related to the separation between what is demanded (task demand) and what is available to deal with the demand (capability). Two experiments were designed with 8 experienced and 13 inexperienced participants. In Experiment 1, the participants were asked to provide subjective impressions pertaining to the separation between task demand and capability (i.e., task difficulty, feeling of risk, and estimates of the likelihood of crashing) after viewing animation clips of road scenes with blind intersections under different forced speeds. In Experiment 2, the participants were asked to drive using a driving simulator in scenes that included blind intersections, similar to those used in Experiment 1. We sought to identify the motivational determinants of behavior in terms of the relationship between subjective feelings and objective safety margins. A highlight was that the experienced participants who reported more difficulty in the forced speeds could ensure a larger safety margin in controlling the speed and lateral distance when self-paced driving with the simulator. This meant that the experienced participants were motivated to ensure a safety margin in preparation for the possibility of covert hazardous road crossings, and the safety margins differed among individuals. Furthermore, the findings seem to support the idea that drivers perceive and/or utilize the feelings (task diff

关键词： Decision making

来源：评论

学校读者我要写书评

暂无评论

Proposal and Evaluation of High-Heat Insulation System for Spacecraft by Using WPT

Proposal and Evaluation of High-Heat Insulation System for S...

引用

作者： Honda, Sayuri Shimada, Shuhei Tanaka, Kosuke Nakamura, Kana Imura, Takehiro Hata, Katsuhiro Hori, Member Yoichi Research Unit I R&D Directorate Japan Aerospace Exploration Agencym 2-1-1 Sengen Ibaraki Tsukuba305-8505 Japan Research Unit II R&D Directorate Japan Aerospace Exploration Agency 2-1-1 Sengen Ibaraki Tsukuba305-8505 Japan Department of Engineering Mechanics and Energy Graduate School of Science and Technology Degree Programs in Systems and Information Engineering University of Tsukuba 1-1-1 Tennodai Ibaraki Tsukuba305-8573 Japan Department of Electrical Engineering Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Chiba278-8510 Japan Department of Informatics and Electronics Institute of Industrial Science University of Tokyo 4-6-1 Komaba Tokyo153-8505 Japan

As a new space station succeeding the International Space Station (ISS), a lunar orbit manned base, called "Gateway," is considered and manned lunar surface exploration via the Gateway is also studied. To realize manned lunar surface exploration, new technologies are required to overcome the severe condition of the lunar night. As one of these technologies, applying wireless power transfer (WPT) to a spacecraft, such as a rover, is proposed. The WPT system contributes to the improvement of heat insulation performance and is ideal for reducing the weight of the battery of the spacecraft. In addition, magnetic transmissive multi-layer insulation (MT-MLI) is developed to suppress the generation of eddy currents. In WPT experiments with MT-MLI, the power transmission efficiency between coils is 90% or more. Furthermore, thermal vacuum tests demonstrate that the combination of WPT and MT-MLI reduces thermal leakage. © 2023 The Institute of Electrical Engineers of Japan.

关键词： Orbits

来源：评论

学校读者我要写书评

暂无评论

An Estimation Method of Fragmentation in Blast Muckpiles using Local and Global Modules of Deep Learning Based on 3D Point Clouds

引用

International Journal of the Society of Material engineering for Resources 2022年第1期25卷 78-84页

作者： Yoshino, Kohei Sato, Taiga Toriya, Hisatoshi Shishido, Hidehiko Hyongdoo, Jang Kawamura, Youhei Kitahara, Itaru Degree Programs in Systems and Information Engineering University of Tsukuba Ibaraki305-8577 Japan Graduate School of International Resource Sciences Akita University Akita010-8502 Japan Faculty of International Resource Sciences Akita University Akita010-8502 Japan Center for Computational Sciences University of Tsukuba Ibaraki305-8577 Japan Western Australian School of Mines: Minerals Energy and Chemical Engineering Curtin University Australia Division of Sustainable Resources Engineering Faculty of Engineering Hokkaido University Sapporo060-8628 Japan North China Institute of Science and Technology China

This paper proposes a method to estimate the particle (rock) size distribution of a muckpile using Deep Learning based on 3D shape information given by 3D photogrammetry. Optimization of blasting is crucial to increase the productivity of mining operations. However, since the internal structure of the ground (bedrock) is usually unknown, it is diffi cult to set the appropriate parameters, amounts of explosives, blasting location and timing. In order to solve the problem, research has been carried out to design and analyze the blasting procedures by measuring the particle size distribution after the blast. Ordinary works focus on developing accurate measurement methods of particle size distribution for the analysis. We aim to increase the measurement accuracy by combining 3D photogrammetry and Deep Learning for 3D shape data. The 3D muckpile model is generated using Structure from Motion (SfM), which is a reconstruction method that can generate 3D point clouds of the target object from multi-view images. The particle size distribution of muckpiles is estimated by using Deep Learning. The proposed network consists of "Local Module "that learns the local shape of rock and "Global Module "that learns the shape of the entire muckpile. From the experiments, it can be said that the fragmentation of the actual muckpiles can be eff ectively estimated by using the proposed method. ©2022 Soc. Mater. Eng. Resour. Japan.

关键词： Particle size analysis

来源：评论

学校读者我要写书评

暂无评论

A systems Approach to Shipboard HF Communications

引用

Naval Engineers Journal 1974年第4期86卷 89-96页

作者： SELINGER, ALAN B. The author received his Bachelors degree in Electrical Engineering from the City College of New York and his Masters degree in Electrical Engineering from New York University where he majored in Statistical Communications and Information Theory. He is presently the Manager of Radio Communications for the Amecom Division of Litton Systems Inc. where he has participated in the design and development of high technology information transfer systems using both wire and radio links as the transmission media. His career has been centered on the technological advancement of communications systems with the objective of error minimization and increased reliability of message linkup and his experience has covered frequency ranges from VLF to microwave. In shipboard communications it has been directly linked to ship systems knowledge gained in the development of the LHA and DD 963 Class ships as well as land-based mobile airborne and transportable communications systems including shipboard applications thereof. Prior to joining Litton Systems he was with the Technical Materiel Corporation where he was responsible for communications programs requiring Navy application.

The subject of this paper deals with High Frequency Shipboard communications, past, present and future. An in‐depth analysis is provided which serves to isolate the performance limitations of electrical noise, inter‐modulation distortion, harmonic distortions and to break the corruption down to its component contributions. Solutions for resolutions of each of the contributing factors is offered in an intergrated fashion resulting in a preferred system which combines the best available attributes of existing equipment with that which is presently under development. The system is examined as to flexibility and applicability to various ship sizes and missions. The examination delves into the sets of combinations of transmitters, receivers, multicouplers, antennas and antenna diplexing schemes which yield optimal results. An in‐depth look at the total High Frequency communications effort aboard ship is analyzed from the standpoint of system implementation, hardware interpretation, and human utilization. Cost and technical “trade‐offs” are examined as to impact on the ship as a combat system, from the standpoint of surviveability and acquisition versus life‐cycle costing. The Fleet needs of the future are analyzed with concentration on higher density and closer spaced communications channels commensurate with the larger more agile needs that are projected. The strike capability of tomorrow's Navy cannot be limited by communications but rather the communications system must be an integrated portion and as advanced and flexible as the rest of the weapons systems. The objective is to finally achieve a communications system which is adequate for both long and short range. A desirable, however, not presently achieved goal is a higher radiated power, higher receive sensitivity system. This must all ***e accomplished with minimal frequency management for the larger, more complex systems and done at competitive cost and higher statistical reliability. © 1974 American Society of

关键词：

来源：评论

学校读者我要写书评

暂无评论

Meeting the information Assurance Crisis in the U.S. Now

引用

EDPACS 2006年第6期28卷 1-14页

作者： Corey Schou Deborah Frincke Charles Reynolds James Frost The Associate Dean of Information Systems Programs at Idaho State University (ISU) in Pocatello and the director of the Center for Decision Support. Currently he serves as the Chair of the National Colloquium on Information System Security Education. Schou also directs the ISU National Center of Excellence in Information Assurance Education and the ISU Technology Innovation Center. Contact Corey Schou one of the authors of this article and the Chair of the NCISSE by email at Schou@*** for help in finding additional ways to address the issues raised in this article. A member of the University of Idaho College of Engineering faculty. She graduated from the University of California at Davis. Frincke is the co-director and co-founder of the university's Center for Secure and Dependable Software (CSDS). She was the program chair for the 2nd International Workshop on Recent Advances in Intrusion Detection (RAID). A professor of Computer Science at the College of Integrated Science and Technology at James Madison University in Harrisonburg Virginia. He holds a Ph.D. in computer science from the University of Texas at Austin and a BA in philosophy from the University of Houston. Reynolds is the Director of Information System Security Education at James Madison University. Since 1997 Reynolds has led the development of the first remote Internet-based curriculum that leads to an M.S. degree in computer science with a concentration in information security. Thus far 160 students have completed this program. A professor of computer information systems at Idaho State University and the manager of its Simplot Decision Support Center.

T he only difference etween evolution and revolution is the speed at which each occurs.

关键词：

来源：评论

学校读者我要写书评

暂无评论

CIRCUIT-BREAKER SHOCK TESTING - INDIVIDUAL COMPONENT TESTS AND APPARATUS MOUNTED TESTS

引用

NAVAL ENGINEERS JOURNAL 1990年第3期102卷 172-195页

作者： BURDETTE, AW DAVES, TM YKEMA, JI Arthur W. Burdette:is an electrical engineer with David Taylor Research Center working in the power distribution systems branch where he has been employed since 1986. He received his B.S. degree in mechanical engineering from the University of Maryland in 1988. He was given an award for outstanding work on a mechanical engineering system design project from ASME in May 1988. Mr. Burdette is a member of ASNE IEEE ASME and the Navy League. Ted M. Daves:is president of Hi-Test Laboratories Inc. a position he has held since 1975. Mr. Daves has devoted his professional career to the Navy Shock Survivability Testing Programs to support shock qualification research on hull mechanical and electrical and combat systems for both surface ships and submarines. Mr. Daves has been involved in several full-scale shock testing programs including the USSJohn F. Kennedy(CV-67) USSKidd(DDG-993) USSYorktownCG-48) and USSOmaha(SSN-692). Mr. Daves has considerable hands-on experience in light weight medium weight and heavy weight shock and vibration testing programs. Mr. Daves conducted shock survivability mechanical inspection and evaluation surveys on the RACER heat recovery steam generator system for the DDG-51 the chilled water system for CVN-71 and replacement distillers for DDG-963. Mr. Daves received his B.S. degree in industrial technology from Western Carolina University in 1970. He is a member of ASME IES Shock and Vibration Information Center and ADPA. John I. Ykema:is vice president and chief technical officer at SPD Technologies Philadelphia Penn. He has served in various capacities within SPD (formerly I-T-E) since 1955. He served for three years (1951–1954) with NavSea (formerly Bu-Ships) engineering electrical power systems for aircraft carriers and cruisers. Mr. Ykema received his M.S. degree in electrical power systems engineering from ITT in 1955 after which he joined I-T-E Circuit Breaker Company in Philadelphia Penn. having various assignments on circuit breakers switchgear relays transformers

The integrity of circuit breakers in a shock environment is essential to the survivability of naval combatant ships. A momentary disruption of power due to the opening of circuit breakers can disable essential combat systems equipment for a substantial period of time relative to the required response time of these systems. Even with the ongoing effort to provide shock hardened circuit breakers, the record indicates that shock integrity has been a continuing area of concern during ship shock trials. An historical review is provided of the efforts which have been undertaken to improve the shock resistance characteristics of circuit breakers and of the circuit breaker mounting structures (i.e., in switchboards or panelboards). Circuit breakers have exhibited varying shock resistance characteristics when tested individually versus when tested as an integral member of a switchboard or panelboard, therefore, a comparison is provided of the shock testing specification requirements of circuit breakers tested as components and of the assemblies into which they are commonly mounted. The differences are analyzed to postulate possible causes for the inconsistency of shock qualified circuit breakers when shock tested in their operating environment. An analysis is provided of the similarities and differences of shock impacts on circuit breakers when tested as components and when tested in a switchgear or panelboard assembly. Two series of tests were conducted, one involving circuit breakers in a panelboard and the other involving circuit breakers in a switchboard. The analysis compares the acceleration-time histories, velocity, displacements, and the shock spectrum derived therefrom. Of particular interest is the mounting structure of circuit breakers when shock tested as components and the interaction of the switchboard structure with the circuit breakers under shock impacts. Recommendations are provided for improvements in specifications, for improvements in the design of the a

关键词： Electric Circuit Breakers

来源：评论

学校读者我要写书评

暂无评论

MEASURES OF EFFECTIVENESS AS APPLIED TO MAINTENANCE PRACTICES

引用

NAVAL ENGINEERS JOURNAL 1992年第4期104卷 101-102页

作者： JACOBS, KS ELFONT, M PROCACCINO, V Mark Elfont Ph.D:. is head of the Engineering Analysis Staff at the Naval Ship Systems Engineering Station (NAVSSES). At NAVSSES Dr. Elfont developed the Ships Machinery Analysis and Reporting Technique (SMART) System that utilizes direct access to the Ships 3-M database to calculate the fleet performance of HM&E systems. The SMART process is an automated approach to performance trending and offers the in-service engineers and life cycle managers cost effective information on the performance of equipments and systems in the actual fleet environment. Prior to coming to NAVSSES Dr. Elfont was at the Naval Air Development Center (NADC) for 18 years with most of his service as program manager for various avionic weapon system developments. Dr. Elfont also spent three years as the business manager of a private telecommunication firm. Vincent Procaccino:is the measures of effectiveness coordinator within the Performance and Business Indicators Section of the Equipment Assessment and Alteration Department Naval Ship System Engineering Station (NAVSSES). Mr. Procaccino is responsible for developing processes and techniques for determining the effectiveness of condition assessment efforts primarily the Assessment of Equipment Condition (AEC) program. NAVSSES is the Navy's in service engineering agent for HM&E equipment and is currently pursuing several programs which are in the process of evaluating condition assessment of HM&E systems. The efforts include continuous on-line monitors and expert system applications. Prior to arriving at NAVSSES in December 1988 Mr. Procaccino received a bachelor of science degree in mechanical engineering from Penn State University in August of 1987. He then worked as a project engineer for a small manufacturing firm until his arrival at NAVSSES.

Recent developments in surface ship maintenance strategies have been advanced on the promise of achieving reduced maintenance costs and improving the availability of shipboard systems. Included in the melange of proposed solutions are the Phased Maintenance Concept, Condition Based Maintenance, Expert System Diagnostics, as well as many other variations of these notions. As programs are initiated to evaluate prototype systems, or in some cases install production units, it is crucial that effective measurement procedures be instituted to determine to what extent the respective program goals and objectives are achieved. This paper explores various data sources that offer potential application to evaluation of advanced maintenance concept effectiveness. Also examined are data analysis and reporting techniques to clearly identify the benefits gained from those activities. The authors feel that it is important that the process of effectiveness evaluation, while remaining an objective process, become a part of the maintenance process itself. Maximum use of existing databases and in-place data collection procedures is advocated.

关键词： Naval Vessels

来源：评论

学校读者我要写书评

暂无评论

COMPARISON OF SHOCK TEST METHODS OF MIL-S-901 DERIVED FROM TESTS ON A CIRCUIT-BREAKER AND SWITCHBOARD

引用

NAVAL ENGINEERS JOURNAL 1992年第3期104卷 178-190页

作者： BRADLEY, TL DAVES, TM MCCAMPBELL, SL YKEMA, JI Thomas L. Bradley Jr:. is director of program management of SPD Technologies research and development group in Philadelphia Pa. He has twenty years of experience on Navy shipboard electrical power protective systems and electrical switchgear. Mr. Bradley received a B.S. degree in electrical engineering from Villanova University. He is a member of ASNE SNAME and IEEE. Ted M. Daves:is president of Hi-Test Laboratories Inc. Mr. Daves has devoted his professional career to Navy shock survivability testing programs to support shock qualification research on hull mechanical electrical and combat systems for both surface ships and submarines. He has twenty years of experience in lightweight medium weight and heavyweight shock qualification programs and has conducted shock survivability inspections at the component and systems level on almost all types of machinery and equipment that require MIL-S-901 shock qualification. He received his B.S. degree in industrial technology from Western Carolina University in 1970 and is a member of ASNE IES Shock and Vibration Information Center and ADPA. Steven L. McCampbell P.E:. is the engineering supervisor and senior technical officer at Hi-Test Laboratories Inc. where he has worked in direct support of Navy shock and vibration testing programs since 1978. His work includes test program management testing machine design and solution of design problems encountered by machinery and equipment undergoing shock and vibration qualification. He is familiar with instrumentation systems and methods data reduction and data interpretation. He received his B.S. in civil engineering from the University of Virginia in 1985. John I. Ykema P.E:. is vice president and chief technical officer at SPD Technologies Philadelphia Pa. He has served in various capacities within SPD (formerly I-T-E) since 1955. He served for three years (1951–1954) with NavSea (formerly BuShips) engineering electrical power systems for aircraft carriers and cruisers. Mr. Ykema received his M.S. degree

For shipboard equipment to qualify as shock-hardened, it must pass a shock test in accordance with the military shock test specification, MIL-S-901 [1]. The test methods prescribed by MIL-S-901 have gone essentially unchanged since 1963. All equipment is divided into three test categories, depending on weight, and a different shock test machine is specified for each weight category. The heavy weight category is further sub-divided depending on the method of mounting within the ship, namely deck mounted or hull mounted. The authors have observed cases when equipment passing MIL-S-901 shock qualification testing using one method (e.g., the medium weight) failed when tested on another method (e.g., the floating shock platform). Concern about this difference in shock phenomena between the approved equipment performance stimulated the authors to perform the testing and analysis presented in this paper. The thirty year old test methods which have contributed significantly to shock survivability may not always simulate adequately the actual shipboard installation during shock qualification testing, thus leading to a false confidence level that all qualified equipment will perform well in combat. To explore the possible variations in shock phenomena from the different methods, an extensive testing program was conducted whereby a 100 ampere circuit breaker was subjected to shock testing under the four methods outlined in MIL-S-901D, namely, lightweight, medium weight, heavy weight deck, and heavy weight hull. The data gathered during the testing, and the performance of the equipment under test, were both evaluated and analyzed to observe differences in shock phenomena from each of the four different test methods. The shock testing methods, the equipment which was subjected to test, the test procedures, and the results of the investigation are described in this paper. The recommendations suggest improvements to the Navy shock testing methods and procedures.

关键词：

来源：评论

学校读者我要写书评

暂无评论

COMPUTER AIDS FOR SHIP DESIGN, INTEGRATION AND CONTROL

引用

NAVAL ENGINEERS JOURNAL 1980年第2期92卷 73-87页

作者： CARLSON, CM JOHNSON, RA HELMING, FW Mr. Craig M. Carlson received his B.S. degree in Naval Architecture and Marine Engineering from the University of Michigan in 1970 and began his career with the Department of the Navy at the Naval Ship Engineering Center (NAVSEC). In 1972. he returned to the University of Michigan under the NAVSEC Long Term Training Program and received his M.S. degree in Naval Architecture and Marine Engineering. After returning to the Ship Arrangements Branch at NAVSEC. he was assigned as Task Leader for General Arrangements for the PGG PCG PHM. and MCM ship designs and was awarded Outstanding Performance Awards in 1974 and 1975. In addition he was Manager of the Arrangement Subsystem of the Navy's Computer-Aided Ship Design and Construction Program (CASDAC). In October 1979. he became Manager of the CASDAC Hull Design System. Currently. he also is enrolled in the M.S. of Computer Science Program at Johns Hopkins University. Mr. Carlson previously has presented technical papers at ASNE Day 1974 and 1978 as well as at the 1979 DOD Manufacturing Technology Advisory Group Conference. Besides ASNE. which he joined in 1972. he is a member of SNAME. ASE. and the U.S. Naval Institute. Mr. Robert A. Johnson is a Naval Architect in Surface Combatants Design (SEA 03D3). Ship Design Integration Directorate Naval Sea Systems Command. He received an Associate in Engineering degree in Drafting and Design Technology in 1959. his B.S. degree in Aerospace Engineering in 1965. and his M.S. degree in Engineering Mechanics in 1970. all from the Pennsylvania State University. In 1973. he was selected for the NA VSEC Hull Division s Long Term Training Program at the University of Michigan subsequently receiving his M.S.E. degree in Naval Architecture in 1974. Mr. Johnson began his career with the Ordnance Research Laboratory at Pennsylvania State University in 1959 where he worked. on the design of hydroelastic submarine models and conducted research in the area of flow induced structural vibrations. In 1967 he joined HRB-Singer at State Colle

This paper presents an integrated approach to Computer-Aided Ship Design for U.S. Navy preliminary and contract design. An integrated Hull Design System (HDS), currently under development by the Hull Group of the Naval Sea systems Command (NAVSEA 32). is the vehicle for the discussion. This paper is directed toward practicing ship design professionals and the managers of the ship design process. Primary emphasis of this paper, and of the development effort currently under way, is on aiding ship design professionals in their work. Focus is on integration and management control of the extremely complex set of processes which make up naval ship design. The terminology of the Ship Designer and Design Manager is used. The reader needs no familiarity with the technologies of computer science.

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：