OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology最新文献

{"title":"A Rule-based System To Help Reduce Offshore Downtime Due To Encroaching Icebergs","authors":"C. Pang, M. El-Tahan","doi":"10.1109/OCEANS.1992.607681","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.607681","url":null,"abstract":"At C-COKE, an experimental prototype rule-based system (or expert system) that can help reduce operational downtime due to encroaching icebergs was developed. Our objectives are to conduct a small-scale feasibility study, to develop an experimental prototype and to evaluate the viability of such a system. The prototype performs five vital functions: 1, identify the ice hazard and determine the appropriate ice-alert level, 2. determine the extent of the threat and/or potential threat, 3. perform a systematic risk analysis and formulate all possible options, 4. recommend an appropi-iate course of action, and 5. explain its decisions, if requested. The goal of the system is to help minimize operational downtime and to ensure the safety of the rig's crew.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116781321","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}

{"title":"A Ten Channel Fiber Optic Telemetry System","authors":"R. Goldsborough","doi":"10.1109/OCEANS.1992.607717","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.607717","url":null,"abstract":"","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125080103","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}

{"title":"Technical Improvements To The WOC/TOGA Lagrangian Drifter","authors":"A. L. Sybrandy, P. Niiler, L. Bombardier","doi":"10.1109/OCEANS.1992.607671","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.607671","url":null,"abstract":"","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125106780","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}

{"title":"Construction Of A Regional Relational/GIS Database In Support Of Ocean Disposal Issues In Massachusetts Bay","authors":"D. Carey, D. Keith, J. Schoenherr, P. Matthias","doi":"10.1109/OCEANS.1992.612688","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.612688","url":null,"abstract":"Within Massachusetts Bay, a number of areas have been used as disposal sites for permitted and possibly non-permitted dumping of radioactive and hazardous wastes. The human and environmental risks associated with these disposal practices are directly related to the location, contents and condition of discrete waste containers. The resource management problem is being addressed with Geographic Information System (GIS) techniques that allow the integration of a variety of data from several sources into a single, integrated relational database/GIS. The relational database will then be used as a tool for the comprehensive evaluation of source characterization and extent of contamination during public health and ecological risk assessments.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126171820","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}

{"title":"A Software Based Operator Interface For An Unmanned Underwater Vehicle","authors":"R. Stokey","doi":"10.1109/OCEANS.1992.607703","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.607703","url":null,"abstract":"There are many advantages to using low cost workstations for the operator interface to an unmanned underwater vehicle. They provide greater design and operational flexibility and can provide more detail to the user. An implementation using a UNM computer running Xwindows is detailed. This computer sends operator commands to the vehicle and displays the status reported back. Status messages are received at regular intervals and stored in an array, thus allowing the operator to observe performance over time. Vehicle faults are reported via popup windows. Data is sent in a low level format allowing it to be displayed in raw and processed formats. Since the program is event driven, some traditional programming approaches don’t work; techniques for circumventing these limitations are discussed. A state free design is used; control items function as both status and command inputs with separate code for each. This allows multiple control stations to be used.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129471962","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}

{"title":"A Multiple-receiver Synthetic-aperture Active Sonar Imaging System","authors":"B. L. Douglas, Hua Lee, C.D. Loggins","doi":"10.1109/OCEANS.1992.612706","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.612706","url":null,"abstract":"Synthetic aperture iechniqucs have not been widely used in sonar imaging duc to problcms with son:u platform motion, slow mapping iatc, ;ind lncdiuln instnhility. A time-varying medium or nonuniform son:bplntform trajectory will cause ph:ise errors in the soi i ;~ ' rct1111is th:lt dcgradc image quali(y. In :I sufficicntly stA>lc rnctfiuin and with motion compcnsntion. Ihc m:isiinurn possihlc unambiguous mapping rate o f ;I single rcccivcr systcln is approximatcly cqu:rl to one-fourth the propag;ition spccil i n [he medium tinics the width o f the tr:insiniltcr. Even :if this rate, the resulting synthetic :ipcrtiirc im:igcs suffer from specular noise. We present a multiple rcccivcr syslcm for synthetic apcilure sonar imaging nnd :I rohusl algorithm th:ll c:iil pcrfonn thc ncccsssry cstiinalion ml col-rcclion ol' motion emors and phasc errors ;ind c:in map ;it :I faster rate than ;i single receiver syslciri. The synlhclic apcilrirc imaging system consists of a lii~ti-rcsol~itioii s dcsc:in s y tcm which has been rnotlitictl to timiismit over :I n;u-row apei-rure, resulting i n a broader hcaiiiwidlh. which innkcs synthetic apcrture imlging possible. Thc ;rlgorithm u t i lizcs the acoustic returns at niulliplc receivers to foim ;I coin plex val ue d prcl i in i nary i m:igc for c:ic t i trans in i t h u I'S I. Each prclirninary i m q c is translated and rot:itcd relntivc to the previous one by an :tmount detcrmincd by the motion of the s o n x pkitforin. Pcilurlxitions o f thc sonar plntform velocity also C:IUSC i-an?c-tlcpcndcnt phxc errors hctween successive preliminary irnligcs. Translation nnd rotation arc estiimtcd Ihrouyh coi-rcl:ition Ixisctl tcchniqucs, then comectcd Ihrougli i m q c rcgistr:ifioii, The rcgislcrcd images are [hen aligned i n ph;isc h y applying :I rxigcdependent phasc correction. Fin:illy the registered pti:isc corrected imagcs x e coticrcntly superimposed to lorin ;I high-resolution synthetic apcrtirrc s o i w iiiwgc. t Chest cr laggin s i s wait t i Son nl ecli , I11 c.. S;in I n I3a I-IXIIII. ('n I i 10 iii i ;i 93111. The tcchniquc involved i n forming the complexv:ilucd preliminary iixigcs :ind the motion compensation :ind p h x c con'cction :ilgorithms will be presented. The rclnlivc tr:tdc-offs hclwccn coherent superposition to form high-resolution synlliclic :rpcrturc images with specular noise. ant1 magnitude siipcrposilion to foim multiple-look physical :ipcilur-c im:rgcs with less specular noise, will be discussed. We present results of cxperiinents at sea with the prolotypc syiiltictic :ipcrtiirc soii'x system.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126912769","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}

{"title":"A Hybrid Neural Network/knowledge Base System For Multi-Target Recognition","authors":"P. Gonsalves, A. Caglayan","doi":"10.1109/OCEANS.1992.612660","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.612660","url":null,"abstract":"In this paper, we present a hybrid artificial neural network (ANN)/knowledge base (KB) system for multi-target recognition (MTR). Specifically, we develop a hybrid MTR archi- tecture composed of ANNand KB classifiers and decision makers, and conventionalsignal processing and probabilistic target track- ing algorithms. Our approach centerson the use of both the on-line classification and parallel processing of neural networks and the formal knowledge and reasoning of domain experts.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123201858","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}

{"title":"A System For Simultaneous Video And Acoustic Data Acquisition","authors":"D. Alexandrou, A. Dollas, S. Babcock, W. Karunaratne","doi":"10.1109/OCEANS.1992.612719","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.612719","url":null,"abstract":"Autonomous acoustic array systems have been recently deployed in the deep ocean for the purpose of detecting and tracking abyssopelagic animals. Cor- rect interpretation of the data acquired by such systems requires information about the acoustic Target Strength (TS) of the animals under study. Currently, TS informa- tion of various deep water species is obtained with acous- tic tank measurements following capture of a number of representative specimens. However, due to the significant structural distortions suffered by these specimens during transport to the surface and subsequent storage, the tank measurements do not yield accurate information. A com- bined video and acoustic data acquisition system would solve this problem by providing in situ TS measurements including species identification and target aspect correc- tion. Described here is a working \"dry\" prototype of such a system which was developed as a proof of concept. The emphasis of this paper is in the newly developed electron- ics of the system.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123213561","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}

{"title":"A Study Of Pulse Scattering In A Waveguide","authors":"M. Broadhead, M. Werby, H. Ali","doi":"10.1109/OCEANS.1992.612738","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.612738","url":null,"abstract":"Abstract : The problem of the scattering of a continuous acoustic wave(CW)from a submerged object in a waveguide has received extensive treatment in the frequency domain, where phenomena associated with the resonant behavior of the object have been studied in detail. This paper concentrates on the time-domain interpretation of the scattering problem. Computation of the scattered field from an incident pulse, which requires calculations for many frequencies, is performed using a new perturbation technique (computed to all orders that allows rapid calculation of the waveguide modes. An implementation of the inverse Fourier transform is presented that is more appropriate to resonance-type spectra. The computational tools developed are used to elucidate various physical aspects of pulse scattering in a waveguide, including: group velocity behavior, direct modal contributions, and resonance contributions from individually excited modes. Acoustic scattering, shallow water, waveguide propagation.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114689863","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}

{"title":"Short And Long Term Modeling Of Dredged Material Discharged Into Continental Shelf Waters","authors":"M. Soldate","doi":"10.1109/OCEANS.1992.612646","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.612646","url":null,"abstract":"Models presented relate the short and long term accumulation of dredged material dumped at continental shelf ocean disposal sites. The models have been revised to work for deeper ocean sites (1,OOO m) as well, and for random locations within a circular disposal site area.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126450994","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}