OCEANS 2006 - Asia Pacific最新文献_第6页

Monitoring Coastal Processes and Ocean Wave Directional Spectra Using a Marine Radar 利用海洋雷达监测海岸过程和海浪方向谱

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393897

D. Trizna

引用次数: 8

Measurements of 3-dimensional Downslope Acoustic Propagation During the Basin Acoustic Seamount Scattering EXperiment (BASSEX-04) 盆地声海山散射实验中三维下坡声传播的测量(BASSEX-04)

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393927

K. Heaney, A. Baggeroer

{"title":"Measurements of 3-dimensional Downslope Acoustic Propagation During the Basin Acoustic Seamount Scattering EXperiment (BASSEX-04)","authors":"K. Heaney, A. Baggeroer","doi":"10.1109/OCEANSAP.2006.4393927","DOIUrl":"https://doi.org/10.1109/OCEANSAP.2006.4393927","url":null,"abstract":"As part of the North Pacific Acoustic Laboratory (NPAL) 2004 sea-test, the Basin Acoustic Seamount Scattering EXperimnet (BASSEX) was performed. A portion of this test was dedicated to taking towed array measurements of acoustic transmissions from the NPAL source moored off the coast of Kauai. In this paper, several transmissions which show evidence of 3-dimensional propagation are analyzed. Broadband transmissions to a towed array provide the opportunity to examine the spacial and temporal arrival structure of the acoustic propagation. Clear multipath arrivals with times and arrival angles different from the expected 2-dimensional plane of propagation are recorded. These results are presented as well as a hypothoses for how the interaction of the acoustic field and the local bathymetry leads to 3-dimensional propagation. In order to examine the stability of these arrivals, the 20 minute reception is run through a frequency domain adaptive beamformer. Comparison of the eigenspectra with 2 D Parabolic Equation simulations leads to the conclusion that bottom roughness and 3 D propagation are significant factors in explaining the arrival complexity.","PeriodicalId":268341,"journal":{"name":"OCEANS 2006 - Asia Pacific","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128883607","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

An Architecture for Underwater Networks 水下网络的体系结构

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393953

M. Chitre, L. Freitag, E. Sozer, S. Shahabudeen, M. Stojanovic, J. Potter

{"title":"An Architecture for Underwater Networks","authors":"M. Chitre, L. Freitag, E. Sozer, S. Shahabudeen, M. Stojanovic, J. Potter","doi":"10.1109/OCEANSAP.2006.4393953","DOIUrl":"https://doi.org/10.1109/OCEANSAP.2006.4393953","url":null,"abstract":"As electromagnetic waves do not propagate well underwater, acoustics plays a key role in underwater communication. Due to significant differences in the characteristics of electromagnetic and acoustic channels, networking protocols for underwater systems differ from those developed for wired and wireless radio networks. Various schemes have been proposed for one or many aspects of underwater networks. However, no widely accepted common framework exists for underwater acoustics to unify these proposed schemes into a functional underwater network. The availability of such a framework will enable easy integration of independently developed techniques and thus accelerate the pace of research in underwater acoustic networking. In order for a common framework to be successful, it needs to have a wide acceptance. To gain such an acceptance, a framework needs to take into account a wide variety of different constraints and requirements for various underwater applications. This requires inputs from various research groups and end users. To help define the use cases and a common framework for underwater networking, a joint effort has been initiated between acoustic communication research groups at the Acoustic Research Laboratory (National University of Singapore), Woods Hole Oceanographic Institution and the Massachusetts Institute of Technology. In this paper, we discuss the first draft of the framework specifications from this effort. We welcome feedback from the underwater acoustic research community and potential end users of underwater networking systems.","PeriodicalId":268341,"journal":{"name":"OCEANS 2006 - Asia Pacific","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126915952","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: 29

Wakeup Scheme for Ocean Monitoring Underwater Sensor Networks (UWSN) 海洋监测水下传感器网络(UWSN)唤醒方案

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393874

Y. Wong, L. Ngoh, W. Wong, W. Seah

引用次数: 3

Test-bed for Navigation and Control of a Thruster based AUV 基于推力器的水下航行器导航与控制试验台

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393968

R.P. Kumar, S. S. Babu, Y. Srilekha, C. Kumar, D. Sen, A. Dasgupta

{"title":"Test-bed for Navigation and Control of a Thruster based AUV","authors":"R.P. Kumar, S. S. Babu, Y. Srilekha, C. Kumar, D. Sen, A. Dasgupta","doi":"10.1109/OCEANSAP.2006.4393968","DOIUrl":"https://doi.org/10.1109/OCEANSAP.2006.4393968","url":null,"abstract":"A thruster controlled AUV is being developed for the Indian AUV project. All motions and control is carried out by a set of five thrusters for controlling positions in two attitudes and three linear directions. As a prototype and verification system for the above AUV, a test-bed to develop and validate the control schemes was found necessary and has been developed at IIT Kharagpur. This paper describes the design criteria of the test-bed and the methods used to develop control scheme for such class of underwater vehicles, which are wholly thruster controlled and can be implemented in this test-bed. The design and capabilities of such a test-bed has been considered for taking into account similar thruster actuated AUVs which may be used in conditions like low speed motion as well as high maneuverability, station keeping etc. Such vehicles are different from the hydroplane controlled vehicles which are more effective above a certain operational velocity. The test-bed proposed here is targeted to generate valuable experimental data for full thruster controlled underwater vehicles operating over a range of operational velocities including station keeping to cruising modes.","PeriodicalId":268341,"journal":{"name":"OCEANS 2006 - Asia Pacific","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133399064","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: 7

Adapted Distributed Localization of Sensors in Underwater Acoustic Networks 水声网络中传感器的自适应分布定位

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393815

J. Garcia

引用次数: 8

Application of Parametric Acoustics for Shallow-Water Near-Surface Geophysical Investigations 参数声学在浅水近地表物探中的应用

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393876

M. Vasudevan, K. M. Sivakholundu, R. D. Venkata, S. Kathiroli

{"title":"Application of Parametric Acoustics for Shallow-Water Near-Surface Geophysical Investigations","authors":"M. Vasudevan, K. M. Sivakholundu, R. D. Venkata, S. Kathiroli","doi":"10.1109/OCEANSAP.2006.4393876","DOIUrl":"https://doi.org/10.1109/OCEANSAP.2006.4393876","url":null,"abstract":"Shallow-water near-surface geophysical investigations were carried out, under two different scenarios - one to assess the status of a pipeline in the West coast and the other to assess the effect of water-injection dredging in the East coast of India. In both these investigations, Parametric Sediment Echo Sounder (SES-2000), a system developed by Innomar Technologie GmbH, which makes use of the parametric acoustical effect, was used. In the former case, profiles were taken across a pipeline at regular intervals to determine whether it was buried or exposed. The parametric system produces a 2D geo-acoustic section in which the pipe is indicated by a hyperbolic curve. The exposed height or buried depth of the pipeline at a crossing is then estimated. This investigation could, also, reveal the geomorphologic changes in the immediate vicinity of the pipeline. In the latter case, parametric acoustics was utilized to provide supplementary results for the assessment of water-injection dredging. Parametric acoustic data could expose the abrupt termination of certain near-seabed layer interfaces and sediment accumulations along steep slope, quite convincingly. SES-2000 proved to be handy to investigate the near-surface sub-seabed, especially in areas where conventional or popular methods find practical difficulties to be carried out.","PeriodicalId":268341,"journal":{"name":"OCEANS 2006 - Asia Pacific","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129003889","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: 3

Salinity Gradients in Coastal Waters by Airborne Microwave Radiometer Remote Sensing 航空微波辐射计遥感沿海水域盐度梯度

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393916

M. Heron, P. Ridd, A. Prytz, Yonghong Wang, J. Hacker

引用次数: 2

Particle Filtering Detection in Turbo Coded OFDM System over Underwater Acoustic Communication Channels 水声通信信道上Turbo编码OFDM系统的粒子滤波检测

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393829

Liang Zhao, Wei-qing Zhu

引用次数: 1

Acoustic Shadowgraph Mapping of Convective Activity 对流活动声影图制图

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393904

J. Rodrigues, B. Uscinski, A. Kaletzky

引用次数: 0