Most applications of underwater cyber-physical system (UCPS) demand reliable data collection in an efficient and timely manner. However, the energy-constrained characteristic on acoustic communication makes it challenging to collect data. In this paper, we study energy-efficient for UCPS over autonomous vehicle (AUV) assisted sensor network. The nodes perceive local physical parameters, whose lifetime is strictly restricted by power. AUV that has relatively sufficient energy adopted retrieve...

Location estimation of underwater sensor networks ( USNs ) has become a critical technology, due to its fundamental role in the sensing, communication and control ocean volume. However, asynchronous clock, security attack mobility characteristics environment make localization much more challenging as compared with terrestrial networks. This paper is concerned privacy-preserving issue for USNs. Particularly, hybrid network architecture that includes surface buoys, anchor nodes, active nodes...

Abstract Since June 2010, the Geostationary Ocean Color Imager (GOCI) has been collecting first diurnally resolved satellite ocean measurements. Here GOCI retrievals of phytoplankton chlorophyll concentration and fluorescence are used to evaluate daily seasonal changes in photophysiological properties. We focus on nonphotochemical quenching (NPQ) processes that protect from high light damage cause strong diurnal cycles emission. This NPQ signal varies seasonally, with maxima winter minima...

This paper studies the problem of dynamic coverage with wireless sensor and actor networks (WSANs) in underwater environment. Different from most existing works, WSANs consist two kinds nodes, i.e., nodes (SNs) which cannot move autonomously (ANs) can according to performance requirement. The how coordinate facilitate environment is challenging due their heterogeneous capabilities. To reduce redundancy communication links improve connectivity between ANs SNs WSANs, a min-weighted rigid graph...

Dear Editor, This letter studies the communication-aware mobile relaying via an autonomous underwater vehicle (AUV) for minimal wait time. Compared with analysis-based channel prediction solution, proposed discrete Kirchhoff approximation solution has a higher estimation accuracy. Different deep learning (DL), semi-supervised broad system (BLS) based controller can reduce training Major contributions of this lie in two aspects: 1) Construct BLS-based estimator obstacle scattering effect,...

Bilateral teleoperation system is referred to as a promising technology extend human actions and intelligence manipulating objects remotely. For the tracking control of systems, velocity measurements are necessary provide feedback information. However, due hardware cost constraints, not always available. In addition, time-varying communication delay makes it challenging achieve task. This paper provides solution issue real-time for subjected unavailable signals delays. order estimate...

Mangroves are valuable contributors to coastal ecosystems; knowledge of the dynamics mangrove ecosystems is important in context global change. To obtain this knowledge, remote sensing an indispensable means, yet it poses challenges since accuracy sometimes unsatisfactory distinguishing mangroves from other land cover types with traditional classification methods. In letter, we proposed a modified artificial immune algorithm (AIA), which antibodies represent candidate solutions and antigens...

In complex underwater environments, traditional autonomous vehicle (AUV) formation control algorithms are faced with many challenges in solving collision avoidance and reducing energy consumption. To solve this problem, an AUV clusters algorithm based on mobility prediction is proposed paper. First, a virtual structure constructed to organize the formation. The cluster constructs optimal rigid graph according location of AUVs used as communication link. Then use attractive potential function...

Acoustic sensor networks (ASNs) have been identified as a promising technology to monitor and explore the underwater resources. Most applications of ASNs are required track an target in accurate efficient manner. However, resource-constrained characteristics on acoustic communication makes it challenging achieve tracking task. In this paper, we concerned with problem for ASNs, where nodes used detect acquire position information target. Then, consensus estimation based algorithm is proposed...

Autonomous Underwater Vehicle (AUV) is referred as a promising device to extend human intelligences harsh underwater environment. Most applications of AUV demand accurate trajectory tracking, however the nonlinear and model inaccuracy constraints on make it challenging achieve tracking task. In this paper, we are concerned with problem for AUV. The assumed be auto navigated in surge, sway, heave yaw. We first give 4-DOF mathematical Then, control formulated into T-S fuzzy framework. Based...

A study of Microwave-induced Thermoacoustic Tomography is presented in this paper. Microwaves illuminate biological tissues to generate acoustic waves by thermoelastic expansion when electromagnetic energy was absorbed human tissues. The generated carry information about different properties which will be collected and processed reconstruct cross section image. In paper, digital body model with 1cm resolution founded according algorithm requirements. Firstly we analyzed the transform...

The timely detection of targets in uncharted territory, followed by tracking and monitoring the are an important part ocean activities. cross-domain approach refers to way target all directions sky sea. Most existing studies based on collaborative within same domain. Cross-domain complements effectively methods, which collects richer more comprehensive data. In this paper, process is divided into two stages: search tracking. Autonomous underwater vehicle(AUV), unmanned surface vehicle(USV)...