2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)最新文献_第6页

Far-IR/submillimeter space interferometry: scientific motivation and technology requirements 远红外/亚毫米空间干涉测量:科学动机和技术要求

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931527

D. Leisawitz, W. Danchi, M. DiPirro, L. Feinberg, D. Gezari, M. Hagopian, J. Mather, S. Moseley, R. Silverberg, W. Langer, M. Shao, M. Swain, H. Yorke, J. Staguhn, Xiaolei Zhang

引用次数: 3

A hybrid genetic algorithm for generating optimal synthetic aperture radar target servicing strategies 合成孔径雷达目标服务优化策略的混合遗传算法

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931250

B. Jackson, J. Norgard

{"title":"A hybrid genetic algorithm for generating optimal synthetic aperture radar target servicing strategies","authors":"B. Jackson, J. Norgard","doi":"10.1109/AERO.2001.931250","DOIUrl":"https://doi.org/10.1109/AERO.2001.931250","url":null,"abstract":"The purpose of this research was to develop a software tool for generating optimal target servicing strategies for imaging fixed ground targets with a spaceborne SAR. Given a list of targets and their corresponding geographic locations and relative priorities, this tool generates a target servicing strategy that maximizes the overall collection utility based on the number of targets successfully imaged weighted by their relative priorities. This tool is specifically designed to maximize sensor utility in the case of a target-rich environment. For small numbers of targets, a target servicing strategy is unnecessary, and the targets may be imaged in any order without paying any particular attention to geographic proximity or target priority. However, for large, geographically diverse target decks, the order in which targets are serviced is of great importance. The target servicing problem is shown to be of the class NP-hard, and thus cannot be solved to optimality in polynomial time. Therefore, global search techniques such as genetic algorithms are called for. A unique hybrid algorithm that combines genetic algorithms with simulated annealing has been developed to generate optimized target servicing strategies. The performance of this hybrid algorithm was compared against that of three different greedy algorithms in a series of 20 test cases. Preliminary results indicate consistent performance improvements over greedy algorithms for target-rich environments. Over the course of 20 trials, the hybrid optimizing algorithm produced weighted collection scores that were on average 10% higher than the best greedy algorithm.","PeriodicalId":329225,"journal":{"name":"2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130514574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A systematic risk management approach employed on the CloudSat project 云卫星项目采用的系统风险管理方法

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931738

R. Basilio, K. Plourde, T. Lam

引用次数: 5

The NIST MEL: assisting aerospace manufacturing through measurements and standards NIST MEL:通过测量和标准协助航空航天制造

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931450

D.C. Stieren

{"title":"The NIST MEL: assisting aerospace manufacturing through measurements and standards","authors":"D.C. Stieren","doi":"10.1109/AERO.2001.931450","DOIUrl":"https://doi.org/10.1109/AERO.2001.931450","url":null,"abstract":"The research, measurement and standards activities of the Manufacturing Engineering Laboratory (MEL) at the National Institute of Standards and Technology (NIST) are summarized, especially as they relate to aerospace manufacturing. NIST is a non-regulatory agency of the U.S. Department of Commerce's Technology Administration that was established in 1901 as the National Bureau of Standards. MEL is one of seven NIST measurement and standards laboratories. MEL works with the American manufacturing sector to develop and apply technology, measurements, and standards. MEL provides industry-needed engineering tools, interface standards, systems architectures, and traceability. Through its research and services, MEL helps U.S. industry successfully compete in the global marketplace. Manufacturers employ MEL research results, test methods, software conformance tests, calibration services, and measurement tools. Disclaimer-No approval or endorsement of any commercial product by NIST is intended or implied. Certain commercial equipment, instruments, or materials are identified in this report in order to facilitate understanding. Such identification does not imply recommendation or endorsement by NIST, nor does it imply that the materials or equipment identified are necessarily the best available for the purpose. This publication was prepared by United States Government employees as part of their official duties.","PeriodicalId":329225,"journal":{"name":"2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130971776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Automated incremental design FMEA 自动化增量设计FMEA

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931423

D. Throop, J. Malin, L. Fleming

引用次数: 14

The migration of digital avionics data buses to low cost optical avionics data networks (the LOADNET project) 数字航电数据总线向低成本光学航电数据网络的迁移(LOADNET项目)

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931354

H. Eyoh, R. Blue, R. D. Gardner, Ivan Andonovic

引用次数: 0

SCL open source - one year later - lessons learned SCL开源-一年后-经验教训

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931418

P. Cappelaere

引用次数: 0

SeaWinds: the QuikSCAT wind scatterometer SeaWinds: quickscat风散射计

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931499

J. Huddleston, M. Spencer

引用次数: 11

Estimating road networks using archived GMTI data 使用存档的GMTI数据估计道路网络

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931504

S.D. O'Neil

{"title":"Estimating road networks using archived GMTI data","authors":"S.D. O'Neil","doi":"10.1109/AERO.2001.931504","DOIUrl":"https://doi.org/10.1109/AERO.2001.931504","url":null,"abstract":"It is increasingly accepted that accurate maps of road networks can make a critical difference in enabling accurate tracking of ground movers using GMTI radar data, especially when sensor resources are limited. However, road maps are often incomplete and inaccurate to such an extent that their utility is eliminated or greatly reduced. At the same time, users of GMTI data have noted in heavily trafficked areas that the road networks are readily apparent on positional displays of GMTI data. This has lead to the notion of estimating the road networks using GMTI data, an idea, which is operationally appealing given that the data, can be collected over a time period of several days to several months. This paper addresses one of the fundamental issues of estimating road networks from GMTI data. We derive a methodology for estimating a road network that views the road in a fundamentally different way than has been the case in previous approaches to this problem. The methodology is motivated by the stochastic models typically employed to model target trajectories as indexed by time, which we modify to come up with a stochastic model for the road trajectory which is indexed by arc-length. We apply this new method and compare it to a recently presented method that views the road as fundamentally composed of segments and vertices, and show using a limited data set that the stochastic estimation approach seems to offer much better performance.","PeriodicalId":329225,"journal":{"name":"2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121231849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Taking atomic force microscope advances to the university classroom 带原子力显微镜走进大学课堂

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542) Pub Date : 2001-03-10 DOI: 10.1109/AERO.2001.931453

J. Adams, G. Priyadarshan, Ade Mabogunje, L. Leifer, C. Quate, E. Ong, B. Ramakrishna

{"title":"Taking atomic force microscope advances to the university classroom","authors":"J. Adams, G. Priyadarshan, Ade Mabogunje, L. Leifer, C. Quate, E. Ong, B. Ramakrishna","doi":"10.1109/AERO.2001.931453","DOIUrl":"https://doi.org/10.1109/AERO.2001.931453","url":null,"abstract":"Because of the current and future importance of the Atomic Force Microscope (AFM) in education and research, our team has been working on transferring this technology to the college classroom. In this paper we present the initial findings of a case study in which two years of cutting-edge AFM research was transferred to the college classroom in the form of a one-semester course. The course was developed before the research was completed and published in final form. While, the course centered on the re-creation and explanation of the most recent advances in building high-throughput AFMs, it also implemented and assessed the use of two online AFMs. Student response to the initial course offering, its content, and the tools used, was very positive. The students rated the course above the department average on 14 of the 15 survey metrics and claimed that the teaching method would help them remember more than other classes (average 8 on a ten-point scale. N=24). As a result of the course, several students have shown interest in pursuing work and research in this field. These results indicate that the course has successfully broadened the horizons of undergraduate and graduate students at the University of Nevada Reno, which had no microtechnology or AFM course offering prior to this work. It has also demonstrated the potential of using the AFM as the center focus of a MEMS/Nano-technology course. Finally, this case study may serve as a model for future technology transfer to the classroom by Ph.D. candidates who have not fully completed their technical research.","PeriodicalId":329225,"journal":{"name":"2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121792818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4