Europe Oceans 2005最新文献_第10页

Sidescan sonar segmentation using active contours and level set methods 利用活动轮廓和水平集方法进行声呐侧扫描分割

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511803

Maria Lianantonakis, Yvan R. PetilIot

引用次数: 47

Multipath combining in chaotic direct-sequence spread spectrum communications through dual estimation 基于对偶估计的混沌直接序列扩频通信多径组合

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511785

S. Azou, M. B. Luca, G. Burel, A. Serbanescu

引用次数: 3

Underwater path planing using fast marching algorithms 基于快速行进算法的水下路径规划

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513161

C. Pêtrès, Y. Pailhas, Y. Pétillot, David. Lane

{"title":"Underwater path planing using fast marching algorithms","authors":"C. Pêtrès, Y. Pailhas, Y. Pétillot, David. Lane","doi":"10.1109/OCEANSE.2005.1513161","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1513161","url":null,"abstract":"In this paper, new tools for obstacle avoidance and path planning for underwater vehicles are presented. The authors' technique, based on a level set formulation of the path planning problem, extracts optimal paths from complex and continuous environments in a complete and consistent manner. Fast marching algorithm is known to be efficient for finding cost optimal path in mobile robotics because of its reliability, precision, and simple implementation. Fast marching algorithm originally propagates a wave front to isotropically explore the space. We propose an anisotropic version of fast marching by adding directional constraints in a cost function to minimize. We then propose a path planning method able to deal with vectorial fields of force for the first time. Furthermore we explore the relation between the curvature of the optimal path and the cost function generated from scalar and vectorial constraints. This a priori knowledge of the influence of the environment on the final path's curvature allows us to propose a solution to make sure a path is reachable by the vehicle according to its kinematics. A multi-resolution scheme based on an adaptive mesh generation is eventually introduced to speed up the overall algorithm. Results are shown computed from real and simulated underwater environments.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"72 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116657371","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: 88

Low power and easy to use ocean bottom seismometer (OBS) for long period surveys 低功耗和易于使用的海底地震仪(OBS)的长期调查

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511726

S. S. Panahi, J. Cadena, X. Roset, A. Mànuel, S. Ventosa, T. Bermúdez, V. Sallarés

引用次数: 1

Fast and robust progressive stereo reconstruction by symmetry guided fusion 基于对称制导融合的快速鲁棒渐进立体重建

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511774

H. Zhang, S. Negahdaripour

引用次数: 10

ML estimation of seafloor topography using multi-frequency synthetic aperture sonar 多频合成孔径声纳对海底地形的ML估计

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511779

P. Barclay, M.H. Hayes, Peter T. Gough

引用次数: 7

An acoustically-linked deep-ocean observatory 一个声学连接的深海观测站

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513188

Dan Frye, J. Ware, M. Grund, J. Partan, P. Koski, Sandipa Singh, Lee Freitag, John A. Collins, R. Detrick

引用次数: 25

Sequential detection of a weak target in a hostile ocean environment 在恶劣的海洋环境中连续探测弱目标

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511719

J. Candy, E. Sullivan

引用次数: 1

Simulation and rapid prototyping environment for underwater acoustic communications: reconfigurable modem 水声通信仿真与快速原型环境:可重构调制解调器

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511688

E. Sozer

引用次数: 9

A novel wideangle ultrasonic sensor utilizing a curved radiator developed for use in an AUV obstacle avoidance system 一种利用弯曲辐射器的新型广角超声波传感器，用于水下航行器避障系统

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513212

S. Nolan, D. Toal, H. Ewald

{"title":"A novel wideangle ultrasonic sensor utilizing a curved radiator developed for use in an AUV obstacle avoidance system","authors":"S. Nolan, D. Toal, H. Ewald","doi":"10.1109/OCEANSE.2005.1513212","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1513212","url":null,"abstract":"This paper presents work on the development and testing of a wideangle ultrasonic transducer developed for use as a low cost short range obstacle avoidance system (OAS) on an autonomous underwater vehicle (AUV). The transducer design is novel in that it utilizes a commercial focusing-bowl piezo element as a convex curved radiator in order to achieve a wide-angled beam profile. The operating frequency of the piezo sensor has been selected to have a short wavelength in water yielding good range resolution. The dimensions of the experimental transducer are small and power consumption is low. It is proposed to use several sensors together with overlapping detection cones to build a sensing system that can provide useful information about objects in an AUV's environment. The principle advantages of such a sensing approach are that it would provide fast detection and location of close range targets and could be implemented with less hardware complexity and signal processing than a typical phased-array sonar approach thus reducing the overall system cost. The sound-pressure distribution, ultrasonic sensitivity, and pulse-echo acoustic performance of the transducer prototype are discussed. Water tank testing carried out to evaluate the acoustic response of the prototype in detecting various dimensioned reflectors in the laboratory is reported.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124253903","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