... Abstract A fishing net localization algorithm based on underwater acoustic sensor networks is proposed. Fishing vessels are utilized as mobile references for underwater localization. After collecting acoustic signals; the algorithm determines the underwater location of fishing nets...

..., it retains the robustness on environment mismatch. INTRODUCTION Vertical line arrays have been used for target localization in waveguide environment based on matched field processing and other methods (Sazontov and Malekhanov, 2015). MFP is performed by matching the data received by array elements...

... al-10mg aluminium alloy grain boundary in-situ tensile test particle initiation concentration corrosion pit hydrogen crack tip aluminium alloy entire fracture scc-induced crack dissolution specimen hydraulic fracturing metals & mining localization fracture 4D Characterization...

... procedure. Looking at Fig. 2 it is possible to see a schematic representation of the cutting-plane return mapping algorithm, where on one side the 603 stress is relaxed by means of a series of local convergences (i.e. superscript k) and on the other one all the plastic variables are updated contributing...

... soils, which are assemblies of discrete particles, may show spatially heterogeneous deformation behavior due to the local rearrangement and individual movements of particles under external loading condition. Accordingly, an understanding of the behavior of granular soils, from the initial state...

... damage detection mode shape damage localization method frame structure index method damage location localization damage indicator indicator damage case artificial intelligence modal strain energy decomposition method axial damage indicator algorithm damage index stubb index...

... ABSTRACT The impact of the parameters such as element spacing, source frequency, array forms of phase conjugation arrays consisting of discrete elements are investigated numerically for sound source localization on the field magnitude and the spatial size of the conjugated field. The results...

...-Autonomous Underwater Vehicle for Intervention Missions. KEY WORDS underwater intervention; autonomous manipulation; sonar; localization; tracking, ultrasound, AUV, ROV. INTRODUCTION Many intervention tasks in the underwater environment are today performed by manned submersibles or Remotely Operated Vehicles...

... ABSTRACT The aim of this paper is to propose a technique for Simultaneous Localization and Mapping in underwater environments by means of acoustic sensors. The proposed procedure consists in the application of suitable Neural Network and Iterative Closest Point algorithms for objects detection...

... ratio which suppresses premature strain localization in the pipe body. This is particularly useful for testing high strength steels. Unloading compliance in combination with FEA was used to assess crack growth. Compliance transfer functions were developed and tearing resistance was quantified using...

... ABSTRACT In unconfined compression tests, a clay specimen deforms uniformly at the beginning of loading, but the deformation changes into non-uniform deformation near maximum load. At that time, strain is localized in the specimen, and localization of strain leads to failure of specimens...

..., are continuously exposed to wave loads and may result in critical damage from fatigue or ship collision. Visual inspection techniques and localized ultrasonic, radiograph, etc., are usual ways to inspect the potential damages. However, many adverse conditions can limit, both technically and economically...

... ABSTRACT New ISUM stiffened plate model that consists of large plate elements for local plate panels and beam-column elements for stiffeners is applied to the progressive collapse analysis of a ship's hull girder under longitudinal bending. The employed ISUM model is characterized by the shape...

... locations) but also its own shape in real-time, while also acting as a communication link between AUVs. Using this cable, we propose a Hand-in-hand System(HS) for AUV localization and development of an obstacle avoidance strategy to accomplish the given task. For applying the smart cable underwater...

... to collect space information. non-homogeneous image wave direction marine radar image wave pattern wavelet transform artificial intelligence radar image spectral analysis wavelet function localization wavelength fourier transform engineering information spectral information spectrum...

... as follows, 1) Although it is assumed that the strain hardening of slip systems depends only on the back stress of each slip system, the deformation modes under tensile and compressive loading are different. 2) Even if the strain amplitude is only 3.5x10 -3 , the localization of plastic strain becomes more...

... is reviewed. estimation us government modeling sensor data fusion auv representation bellingham localization navigation data association vehicle information underwater vehicle ocean data assimilation artificial intelligence leonard reconstruction Proceedings of the Seventh (1997...

... localization and severity estimation exercises are performed for an example of an offshore jacket platform. Finally, the accuracy of damage localization and severity estimation results in the numerical example is assessed as a function of model uncertainties for the structure. INTRODUCTION During the past...

...Proceedings of the Fourth (1994) InternatIOnal Offshore and Polar Englneenng Conference Osaka, Japall, Apnl 10-15.1994 Copynght © 1994 by The International SocIety of Offshore and Polar Engineers ISBN 1-880653-10-9 (Set); ISBN 1-880653-14-1 (Vol IV) Optimizing Mode Localization in Periodic...

... spatially localized modes and spatially localized responses to forcing at the natural frequencies. Weakly coupled oscillators are very typical of structures displaying such behavior. Experiments were carried out to demonstrate the existence of localization in a disordered periodic structure. The structure...