2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)最新文献

{"title":"A Paradigm Shift for Interoperable Submarine Rescue Operations: The Usage of JANUS During the Dynamic Monarch 2017 Exercise","authors":"J. Alves, R. Petroccia, A. Grati, Nicolas Jourden, Gennaro Vitagliano, P. Garcia, Jose D. Nieves Prieto, J. D. de Sousa","doi":"10.1109/OCEANSKOBE.2018.8559465","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2018.8559465","url":null,"abstract":"The NATO Centre for Maritime Research and Experimentation (CMRE) participated for the first time in the Dynamic Monarch submarine rescue exercise, bringing to the operational players a new interoperable digital underwater acoustic communications capability introduced by JANUS. Currently, communications during rescue operations are performed solely with the analogue underwater telephone and the usage of the phonetic codes (alpha to zulu). This has the clear problem of needing an operator (that may be required for other equally critical tasks) to handle the communications on the submarine side. Stress and phonetic biases may also play a role in the success of the underwater telephone communications. Interoperable digital underwater communication may undoubtedly render submarine escape and rescue more effective, but above all it may introduce a whole new way of conducting operations. Digital underwater communications can, in fact, enable machine-to-machine interaction (not viable with analogue underwater telephone) and open the way for the introduction of networked underwater unmanned systems. This paper provides an overview of the activities that led to the participation of CMRE in the submarine rescue exercise Dynamic Monarch 2017. We present the key conclusions taken throughout the process that started in 2016 and culminated with the participation in the exercise, in September 2017.","PeriodicalId":441405,"journal":{"name":"2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)","volume":"116 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131207529","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":"Sea Ice Detection Based on Unambiguous Retrieval of Scattering Coefficient from GNSS-R Delay-Doppler Maps","authors":"Q. Yan, Weimin Huang","doi":"10.1109/OCEANSKOBE.2018.8559148","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2018.8559148","url":null,"abstract":"In this paper, a method is proposed for detecting sea ice based on the scattering coefficient $(sigma^{0})$ retrieved from Global Navigation Satellite System-Reflectometry (GNSS-R) delay-Doppler maps (DDMs). First, a strategy for unambiguously retrieving the surface scattering coefficients is illustrated, by employing the spatial integration approach (SIA) and the multi-scan technique. Next, the application of this proposed scheme for sea ice remote sensing is demonstrated using DDMs acquired from the U.K. TechDemoSat-l (TDS-l) mission and verified with the collocated reference sea ice concentration (SIC) data obtained by Nimbus-7 SMMR and DMSP SSM/I-SSMIS sensors. The test results show that the proposed method offers a new solution to sea ice detection and a feasible aspect for resolving the ambiguity in the retrieval of $sigma^{0}$ from GNSS-R DDMs.","PeriodicalId":441405,"journal":{"name":"2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127111761","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":"Benthic Crawler NOMAD","authors":"J. Lemburg, F. Wenzhöfer, Michael Hofbauer, Paul Färber, V. Meyer","doi":"10.1109/OCEANSKOBE.2018.8559446","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2018.8559446","url":null,"abstract":"NOMAD is an autonomous benthic crawler carrying scientific instrumentation for scanning a continuous track of the seafloor and performing cyclic oxygen profiles and in-situ measurements of total exchange rates in depth of up to 6000m. It expands the line of preceding crawlers by achieving the highest payload to weight ratio by the application of function-integrating lightweight design that is instantiated as low-density design in the context of underwater systems.","PeriodicalId":441405,"journal":{"name":"2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123712199","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":"Improving Stakeholder and Authority Cooperation Among Coastal Fishing Communities Using Passive Blast Monitoring Data","authors":"A. Chan, P. Hodgson","doi":"10.1109/OCEANSKOBE.2018.8559100","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2018.8559100","url":null,"abstract":"An increased awareness of the mounting pressure on the marine ecosystem as well as the enormity of the recreational SCUBA dive industry has brought about a greater awareness of the challenges facing the marine environment. One key issue is destructive fishing. Destructive fishing is a blanket term used to describe a multitude of fishing methods which are low cost and extremely effective in terms of catch. However, the practice is not sustainable mainly due to the considerable wasted by-catch and irreversible damage done to critical marine eco-systems and habitats. In South-East Asia, the prevalence of destructive fishing is often precipitated by poor socio-economic conditions in coastal communities. Eradicating destructive fishing requires complex, widespread and holistic action on many levels. A proven solution is to engage the authorities and stakeholders and elicit their cooperation to implement alternative livelihood programs. One of the critical problems hindering this action is the lack of knowledge regarding the extent of any destructive fishing activity currently being carried out. It is unrealistic to expect successful practical solutions to be based upon hearsay from divers or datasets collected over the period of only a few days or even sometimes hours. Until recently most of the stakeholders involved in tackling the issue of destructive fishing have been giving the issue a low priority. There are a multitude of reasons for this. One key issue is the lack of understanding of the real situation by those stakeholders can act to reduce it. The lack of available data is a prime reason for this. Until now the approach has been to simply push the responsibility for eradication towards tacking the problem using enforcement. However without engaging and enlisting community support, this approach is impractically expensive. In addition the resources required need to continue to be continually made available, otherwise the destructive fishing will return. The enforcement approach also ignores the needs of the communities. Blast fishing is the predominant and wide-spread method of destructive fishing. It is also a useful indicator of the level of destructive fishing occurring in an area. Recent advancements in technology have made detecting it with Passive Acoustic Monitors (PAM), Passive Seismic Monitors (PSM) or Passive Blast Detectors (PBD) reliable and inexpensive. The use of passive monitoring systems allows a non-confrontational approach to be adopted. Data from these devices can be reinforced with fish and coral data to further quantify the impact of destructive fishing. Furthermore, comparing data from different areas allows the determination of whether blast fishing is a major factor impacting fish stocks in areas, especially within marine protected areas. This paper identifies some of the factors that should be utilized in the decision making for the collection and presentation of collected blast data, allowing it to be used to effectiv","PeriodicalId":441405,"journal":{"name":"2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130836241","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":"Research on DOA Estimation of Nonstationary Signal Based on Fractional Fourier Transform","authors":"Yunchao Zhu, Kunde Yang, Hui Li, Feiyun Wu, Qiulong Yang, Runze Xue","doi":"10.1109/OCEANSKOBE.2018.8559388","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2018.8559388","url":null,"abstract":"In this paper, to estimate the DOA of nonstationary linear frequency modulation(LFM) signal in practical underwater environment, a method of DOA estimation based on fractional Fourier transform (FrFT) is investigated. Firstly, the transformation characteristics of FrFT on LFM signal are investigated. Secondly, the DOA estimation method based on FrFT is performed by following the thread of DOA estimation of narrowband signal, and the effect of focus performance of LFM signal in fractional Fourier (FrF) domain on DOA estimation is obtained through numerical simulations, which benefits the practical application of the method in underwater environment. Finally, an active detection experiment of DOA estimation by FrFT is conducted, which demonstrate that the method has a lower detection threshold and wider detection filed range compared with those in frequency domain.","PeriodicalId":441405,"journal":{"name":"2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129244344","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":"ALMA 2015: Sea Trial of an Underwater Target Localization Technique Using Hausdorff Distance","authors":"P. E. Magalhães, X. Cristol, C. Ioana, D. Fattaccioli, J. Mars","doi":"10.1109/OCEANSKOBE.2018.8559444","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2018.8559444","url":null,"abstract":"The fundamental and practical problem of passive localization in range and depth, of an acoustic underwater source is addressed, with application to an at-sea experiment. We propose and try a new matching method based on a metric called as Hausdorff distance as a cost-function to be minimized, in order to perform the localization inversion. The data set analyzed here was collected during the DGA campaign ALMA 2015, which took place in a shallow water environment of the southern coast of France. Acoustic data were measured over a 10m-high vertical linear array (VLA), composed of 64 hydrophones. The 2-D localization, in range and depth, is performed by matching the patterns of time difference of arrival (TDOA), between respectively observed and modeled sequences. Several variants of the Hausdorff Distance are applied, firstly separately in each single hydrophone, and then combined in order to improve the localization accuracy, reducing the ambiguity either is depth and in range. The performance is evaluated in terms of the localization accuracy of the proposed method, in a context of passive localization with a cooperative system considering a motionless target. Very satisfactory performance and accuracy are obtained.","PeriodicalId":441405,"journal":{"name":"2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128763574","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":"Fishing Spot Prediction by Sea Temperature Pattern Learning","authors":"M. Iiyama, K. Zhao, Atsushi Hashimoto, Hidekazu Kasahara, M. Minoh","doi":"10.1109/OCEANSKOBE.2018.8559299","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2018.8559299","url":null,"abstract":"Determination of appropriate fishing spots is one of the most important activities in the fishing industry. Inspired by the approach followed by fishermen to determine fishing spots, this paper presents a new machine-learning method for uncovering oceanographic patterns related to good fishing spots. Our method uses a sea temperature map as the input, extracts sea temperature patterns from arbitrary points on the map, and evaluates whether the patterns correspond to good fishing spots by using two machine learning techniques; one-class support vector machine (SVM) and spectral clustering. We evaluated the efficiency of our method using fishery data on neon flying squid.","PeriodicalId":441405,"journal":{"name":"2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123220289","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":"The Characteristic of Cross-Correlated Pressure Field in a Wedged Seafloor Environment","authors":"Quan Sun, Kunde Yang, Yuanliang Ma, Yanyang Lu, Feiyun Wu, B. Hou","doi":"10.1109/OCEANSKOBE.2018.8559288","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2018.8559288","url":null,"abstract":"The cross-correlated striation pattern of the complex pressure field has been proved to be a stable method for estimating the radial velocity of a moving source with a single sensor in the shallow water and in the deep ocean. In this paper, the characteristic of the cross-correlated striation pattern in a wedged seafloor waveguide is studied. Based on the wave equation we demonstrate that the cross-correlated vertical striations in the frequency-range plane are caused by the interaction of direct waves at two ranges. The interface reflected waves have significant effects on the cross-correlated striations in the real waveguide. The sediment properties in a wedged seafloor environment are closely related to the bottom reflection. Simulation results show that striations in the frequency-range plane are obscure under hard sediments conditions while they are clear with soft bottom. The striation pattern is closely connected to the interface reflections. Our study provides a reference for the environment of applying the cross-correlation method.","PeriodicalId":441405,"journal":{"name":"2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121497558","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":"Underwater Multi-Target Tracking with Particle Filters","authors":"I. Masmitja, S. Gomáriz, J. del Río, P. Bouvet, J. Aguzzi","doi":"10.1109/OCEANSKOBE.2018.8558865","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2018.8558865","url":null,"abstract":"Robotic platforms communication and interoperability is of relevance for marine science and industrial monitoring. We present results of a particle filter study based on underwater Multi-Target Tracking (MTT) using Autonomous Underwater Vehicles (AUV). The main goal was to assess the viability of using a single surface vehicle as a mobile landmark to track and follow a fleet of underwater targets, each one equipped with an acoustic tag where the slant ranges between the surface vehicle and the underwater targets are the unique input for the filters.","PeriodicalId":441405,"journal":{"name":"2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125625252","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":"Optimization Design of an Blended Wing Body Underwater Glider's Configuration","authors":"Qiaogao Huang, Guanshan Liu, Yunlong Ma, G. Pan, Da Lv","doi":"10.1109/OCEANSKOBE.2018.8559457","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2018.8559457","url":null,"abstract":"For the blended-wing-body underwater gliders, lift-to-drag ratio which is mainly determined by the profile foils is one of the most important performance parameters. In this paper, GUI functions based on MATLAB code are applied to form an optimization system. Parametric model of the foil are described by Class function/shape function transformation (CST) method. XFOIL, an open-source code is employed to compute the hydrodynamic performance of the profile foils. Genetic algorithm is used to finish the optimization of the foils which derived from the profiles of one original blended-wing-body underwater gliders. The optimization result showed that the lift-to-drag ratio of the profile foils rises up to 36%. By using the optimized foils, the new blended-wing-body underwater glider gets its improvements in maximum lift-to-drag ratio, range of attack angle with high lift-to-drag ratio and payload capacity.","PeriodicalId":441405,"journal":{"name":"2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115156014","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}