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Journal articles on the topic 'Underwater Research and Recovery Unit'

Author: Grafiati

Published: 25 July 2024

Last updated: 31 July 2025

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1

Carton, Geoffrey, J. C. King, and R. Josh Bowers. "Munitions-Related Technology Demonstrations at Ordnance Reef (HI-06), Hawaii." Marine Technology Society Journal 46, no. 1 (2012): 63–82. http://dx.doi.org/10.4031/mtsj.46.1.9.

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AbstractDevelopment of methods and technologies to characterize sites with underwater military munitions (UWMM) and respond to UWMM where the risks posed to human health or the environment or explosive hazards are unacceptable is underway. Department of Defense Military Munitions Sea Disposal Site Hawaii (HI-06), referred to locally as Ordnance Reef, is off Oahu’s leeward coast. This site has become the focal point for research on UWMM. Past studies found that the site presents no immediate danger to public safety. The location and water depth at this site present advantages for UWMM research

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O, Tărăbuță. "A Study of the Feasibility of Autonomous Underwater Vehicles and Remotely Operated Vehicles in Black Sea." Scientific Bulletin of Naval Academy XIX, no. 1 (2018): 440–47. http://dx.doi.org/10.21279/1454-864x-18-i1-067.

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An underwater vehicle designed for industrial use in the Black Sea has to tackle two specific characteristics of it, given by its enclosed nature: the strong vertical stratification and the high content of hydrogen sulfide at greater depths. These particular environmental conditions impose also new approaches of design and technology for construction. The innovation foreseen of our study is the very concept of a universal underwater vehicle, based on modular design. Currently, unmanned underwater vehicles are controlled in two main ways, either autonomously (AUV) or by data transfer through an

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Chen, Le, Zhipeng Lin, Taiju Yin, Zhongchao Li, Chunsheng Shen, and Bobo Luo. "Analysis of Reservoir Architecture of Shallow-water Delta Front Based on Process—A Case of S2L410 in Southern 79 Block in Wennan Oilfield." Studies in Engineering and Technology 4, no. 1 (2017): 96. http://dx.doi.org/10.11114/set.v4i1.2530.

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The sand body distribution is relatively limited in this block, the lens-shaped sandbodies are more developed, the change of intergranular sandbody is fast and the internal architecture of the sand body is complex, which results in the difficulties of the arrangement of horizontal wells in the study area and the tapping of remaining oil in high water reservoirs. In this paper, taking an example of S2L410 sandbodies in Wen 79 Southern Block, rich drilling data, core data, logging data and geological research results accumulated over many years in Wennan Oilfield were applied to discuss the anat

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Popov, Vladimir Vladimirovich, Aleksandra Vitalievna Ivanovskaya, Valentin Leonidovich Erofeev, and Elena Vladimirovna Bogatyreva. "Specific features of methodology for conducting experimental studies of adaptive control system of ship lifting devices." Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2022, no. 3 (2022): 40–49. http://dx.doi.org/10.24143/2073-1574-2022-3-40-49.

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Lowering and recovery operations, as well as towing underwater and surface objects are carried out with the help of a ship winch. As a result of the impact of any external disturbances, longitudinal oscillations appear in the towing rope, whose resonant maxima may fall into the vessel’s frequency range. The longer the cable, the greater the number of resonant frequencies in the operating range. Such operating conditions of the ship’s lifting equipment have a negative impact on the operation of the ship’s power plant as a whole. In order to increase the reliability of deck lifting equipment it

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Wang, Zhenfei, Meixin Hu, and Ketao Zhang. "Underwater Turbid Media Stokes-Based Polarimetric Recovery." Sensors 24, no. 5 (2024): 1367. http://dx.doi.org/10.3390/s24051367.

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Underwater optical imaging for information acquisition has always been an innovative and crucial research direction. Unlike imaging in the air medium, the underwater optical environment is more intricate. From an optical perspective, natural factors such as turbulence and suspended particles in the water cause issues like light scattering and attenuation, leading to color distortion, loss of details, decreased contrast, and overall blurriness. These challenges significantly impact the acquisition of underwater image information, rendering subsequent algorithms reliant on such data unable to fu

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Zhang, Dong, Xingming Ma, Xue Zhang, Peng Gao, and Kai Li. "Research on a Miniature Underwater Vehicle Based on a Multi-Unit Underwater Coupled Jet Drive." Actuators 14, no. 5 (2025): 244. https://doi.org/10.3390/act14050244.

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The underwater unstructured environment poses new challenges for the miniaturization and flexibility of underwater vehicles. This paper proposes a method of using micrometer-scale vibrations of piezoelectric vibrators to drive macroscopic jets. Then, we use two coupled piezoelectric jet driving units to construct a miniature underwater vehicle. Numerical simulation is used to investigate the flow field characteristics of coupled jets. Finally, the impact of the angle between the two piezoelectric jet drive units on the propulsion force is analyzed. The miniature underwater vehicle measures 77.

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Xue, Teng, Tianchi Zhang, and Jing Zhang. "Research on Underwater Image Restoration Technology Based on Multi-Domain Translation." Journal of Marine Science and Engineering 11, no. 3 (2023): 674. http://dx.doi.org/10.3390/jmse11030674.

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Underwater images are crucial in various underwater applications, including marine engineering, underwater robotics, and subsea coral farming. However, obtaining paired data for these images is challenging due to factors such as light absorption and scattering, suspended particles in the water, and camera angles. Underwater image recovery algorithms typically use real unpaired dataset or synthetic paired dataset. However, they often encounter image quality issues and noise labeling problems that can affect algorithm performance. To address these challenges and further improve the quality of un

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Ren, Zhibin, Meng Wang, Xianhu Luo, Chentao Wang, and Tailong Chen. "Research on Underwater Constant High-Voltage DC Switching Technology for MCSEM." Sensors 24, no. 20 (2024): 6598. http://dx.doi.org/10.3390/s24206598.

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The marine controlled source electromagnetic (MCSEM) transmitter can transmit high currents near the seabed to detect the electrical structure of the seafloor. The use of three-phase alternating current (AC) transmission can lead to three-phase imbalance, which results in an excessive current in one phase’s power line and affects the safety of the tow cable. This paper proposes an MCSEM underwater constant high-voltage direct-current (DC) switching scheme that replaces AC transmission with DC transmission. This scheme can fundamentally avoid three-phase imbalance and the AC loss caused by indu

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Zhao, Jie, Yilin Liang, Yudi Fang, et al. "Research on the Unit Black-Start Strategy Considering Recovery Path and Start Sequence." Sustainability 14, no. 20 (2022): 13057. http://dx.doi.org/10.3390/su142013057.

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Large-scale power outage events bring serious economic losses to national and social development and cause bad impacts, and the reasonable formulation of a unit black-start strategy is the basis of power outage recovery. Firstly, the Dijkstra shortest path algorithm is used to search for the optimal recovery path of the unit to be started after a major blackout occurs, and secondly, a comprehensive index of the unit start sequence considering the unit characteristics and unit distance is defined to guide the unit start sequence formulation by combining the unit capacity, climbing rate, start p

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Zhang, Wei, Haitian Chen, Tao Chen, Zheping Yan, and Hongliang Ren. "Research on Coordinated Robotic Motion Control Based on Fuzzy Decoupling Method in Fluidic Environments." Mathematical Problems in Engineering 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/820258.

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The underwater recovery of autonomous underwater vehicles (AUV) is a process of 6-DOF motion control, which is related to characteristics with strong nonlinearity and coupling. In the recovery mission, the vehicle requires high level control accuracy. Considering an AUV called BSAV, this paper established a kinetic model to describe the motion of AUV in the horizontal plane, which consisted of nonlinear equations. On the basis of this model, the main coupling variables were analyzed during recovery. Aiming at the strong coupling problem between the heading control and sway motion, we designed

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Niemeyer, Frank, Christopher Karberg, Kathrin Baumgarten, et al. "MiniLab - Agile underwater platform with integrated sensors for environmental and visual applications." International Hydrographic Review 28 (November 1, 2022): 212–20. http://dx.doi.org/10.58440/ihr-28-n15.

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The Fraunhofer “Smart Ocean Technologies” (SOT) research team extends its range of services towards underwater technology by developing new internal infrastructure. To test sensor technology and materials, empirical underwater data is required to evaluate new technology within realistic conditions. Various external factors like swell, wind, and the underwater environment itself complicate stable framework conditions during the measurements. For this purpose, a test platform called MiniLab was developed which can be extended by modules with respect to common interfaces. It serves as a base fram

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Yan, Luoheng, and Zhongmin Huangfu. "A Coverage Hole Recovery Method for 3D UWSNs Based on Virtual Force and Energy Balance." Electronics 13, no. 22 (2024): 4446. http://dx.doi.org/10.3390/electronics13224446.

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Underwater wireless sensor networks (UWSNs) have been applied in lots of fields. However, coverage holes are usually caused by complex underwater environment. Coverage holes seriously affect UWSNs’ performance and quality of service; thus, their recovery is crucial for 3D UWSNs. Although most of the current research recovery algorithms demand hole detection, the number of additional mobile nodes is too large, the communication and computing costs are high, and the coverage and energy balance are poor. Therefore, these methods are not suitable for UWSN hole repairing. In order to enhance the pe

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KOPER, Piotr, Agnieszka PALMOWSKA, and Agnieszka MYSZKOWSKA. "RESEARCH OF SINGLE ROOM DECENTRALIZED HEAT RECOVERY UNIT." Architecture, Civil Engineering, Environment 12, no. 4 (2020): 109–14. http://dx.doi.org/10.21307/acee-2019-056.

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Lee, Chong Hyun, Kibae Lee, and Guhn Hyeok Ko. "An underwater sound event detection algorithm based on Temporal Graph Convolutional Network." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A78. http://dx.doi.org/10.1121/10.0022856.

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Accurate underwater sound event detection (SED) and real-time underwater situation awareness plays an important role in intelligent sonar system. However, little research on underwater SED has been done because underwater acoustics have very complex and dynamic spectral and temporal characteristics which make underwater SED difficult to solve. The goal of SED is to recognize type and time of the input audio signal and most of SED research have been focused on airborne sound so far. To address underwater SED problem, we adopt temporal graph convolutional network (T-GCN), which is originally des

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Zhang, Lingli, Chengming Luo, Xiyun Ge, Yuxin Cao, Haobo Zhang, and Gaifang Xin. "Three-Dimensional Iterative Enhancement for Coverage Hole Recovery in Underwater Wireless Sensor Networks." Journal of Marine Science and Engineering 11, no. 12 (2023): 2365. http://dx.doi.org/10.3390/jmse11122365.

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The efficient coverage of underwater wireless sensor networks (UWSNs) has become increasingly important because of the scarcity of underwater node resources. Complex underwater environments, water flow forces, and undulating seabed reduce the coverage effect of underwater nodes, even leading to coverage holes in UWSNs. To solve the problems of uneven coverage distribution and coverage holes, a three-dimensional iterative enhancement algorithm is proposed for UWSN coverage hole recovery using intelligent search followed by virtual force. Benefiting from biological heuristic search algorithms, i

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Gong, Haixia, Zhuoran Ping, Tong Zhao, et al. "Research on Contact Anchoring Theory and Contact Optimization of Underwater Pipeline Recovery Tools." Processes 11, no. 11 (2023): 3166. http://dx.doi.org/10.3390/pr11113166.

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Technology for recycling abandoned undersea pipelines is crucial for lowering the cost of installing new submarine pipelines, polluting the ocean less, and improving recycling efficiency. A popular area of study is how to lessen the harm that underwater pipeline recycling instruments do to the inner wall of the pipeline during recycling. In order to recover pipelines, this study examines the anchoring theory and damage process of submerged pipeline recovery equipment. The effect of the contact body’s diameter and radius of the rounded corner on the depth of the pressed-in pipeline and the slip

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Zhang, Lan, Yu Tao Zhang, Li Quan Wang, and Zhi Peng Wang. "Design and Dynamic Characteristics Research of Hydraulic Compensator in Deep Water." Applied Mechanics and Materials 574 (July 2014): 603–8. http://dx.doi.org/10.4028/www.scientific.net/amm.574.603.

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In this paper, mechanical model of traditional bellow type pressure compensator is established. The analysis of static characteristic shows that compensation volume and variation of pressure compensate margin are limited to each other. As a result, it cannot meet the requirements of marine equipment to the underwater hydraulic power. Therefore, a new type of pressure compensation unit is developed, it has advantages of big volume compensation and almost constant pressure compensate margin, it solves the core technical problem of deep-water balancing hydraulic power. The simulation results show

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18

Li, Yong An, Ting Ting Wang, Xue Lai Liu, and Teng Xing. "Thermal Performance Research of Thermal Recovery Unit for Air-Conditioning Systerm." Advanced Materials Research 243-249 (May 2011): 4965–68. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.4965.

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This document established a three-dimensional laminar mathematical and physical model which describes heat transfer, mass transfer coupling process in wet thermal recovery unit for air-conditioning systerms, based on Computational Fluid Dynamics (CFD) simulations. In addition, the research discussed the distributions of pressure, temperature, concentration and other parameters in the air channels. The heat transfer performance was analyzed by enthalpy efficiency. The results showed that the structural parameters of wet thermal recovery unit for air-conditioning systerm played important influen

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Radeta, Marko, Claudio Rodrigues, Francisco Silva, et al. "Lost in the Deep?" Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies 7, no. 2 (2023): 1–27. http://dx.doi.org/10.1145/3596245.

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Computing research is increasingly addressing underwater environments and examining how computing can support diving and other activities. Unlike on land, where well-established positioning methods are widely available, underwater environments lack a common positioning mechanism, which is a prerequisite for many applications. Dead reckoning, the use of angle and distance estimates to track position changes from a known point of origin, is a promising candidate for underwater positioning as it does not rely on wireless signals (which decay rapidly in underwater environments) and as there is a w

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Huang, Jin, Bingquan Zhang, Weiqiu Huang, et al. "Research on the general technical standards of the gasoline vapor recovery unit set." E3S Web of Conferences 118 (2019): 02017. http://dx.doi.org/10.1051/e3sconf/201911802017.

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Along with the increasingly strict environmental regulation and the willingness to rapidly promote gasoline vapor recovery management, the development of technology and equipment for gasoline vapor recovery industry grows faster, and the demand for relevant technical standards is also growing. Based on the domestic and foreign development situation of gasoline vapor recovery technology and standard, this article analyzes necessity and urgency of the general technical standards for development of China’s vapor recovery unit, and then it introduces the main technical content of the national stan

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Delina, M., Taryudi, M. F. Amin, et al. "The Development of Remotely Operated Underwater Vehicle for Plastic Waste Detection with Raspberry Pi." Journal of Physics: Conference Series 2866, no. 1 (2024): 012048. http://dx.doi.org/10.1088/1742-6596/2866/1/012048.

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Abstract Underwater Plastic waste has had a serious impact on the environment. Unfortunately, Detecting and collecting underwater plastic waste is still a challenge, especially in Indonesia because of its position in the water, and the water turbidity. In previous research, a computer algorithm for detecting underwater plastic waste has been developed with Yolov3. To improve the research, we developed a Remotely Operated Underwater Vehicle (ROUV) with Raspberry Pi through the Research and Development (R&D) method. This ROUV is like a submarine that operates in the water and is integrated w

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Wei, Jie, and Shaohua Li. "Application of Convolutional Neural Network in Quantifying Reservoir Channel Characteristics." Applied Sciences 14, no. 6 (2024): 2241. http://dx.doi.org/10.3390/app14062241.

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After many years of exploitation in the petroleum field, most of the oil fields are in advanced stages of development, with a strong non-homogeneity of the reservoir, more residual oil, and low recovery efficiency. Therefore, research on various methods has been carried out by scholars to improve the rate of recovery and to understand the distribution pattern of residual oil in reservoirs. Among the whole clastic reservoirs, fluvial reservoirs occupy a large proportion, so fluvial reservoirs will be the priority for future reservoir research in China. The key to the fine characterization of fl

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Simon, Siregar, Ikhsan Sani Muhammad, Muchlis Kurnia Muhammad, and Hasbialloh Dzikri. "Low-cost communication system for explorer-class underwater remotely operated vehicle." TELKOMNIKA Telecommunication, Computing, Electronics and Control 17, no. 2 (2019): 593–600. https://doi.org/10.12928/TELKOMNIKA.v17i2.11791.

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Disaster recovery from underwater earthquake, plane crashes into the sea, and monitoring underwater cables or piping for energy purpose are underwater missions for Remotely Operated Underwater Vehicle (ROV) in ASEAN MATE 2018 Competition. Two essentials factor to perform successfully in this ROV competition are design of an efficient communication protocol system and a low-cost communication hardware. In this research, an optimal communication system between RS-232 serial communication transmission and RS-485 serial communication transmission is developed to obtain the optimal solution. Both c

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Meng, Jing, Zhi Xin Chen, Tao Jiang, and Zhi Qiang Xu. "Controllable of Underwater Towing Tension Passive Compensation Device Design Research." Applied Mechanics and Materials 721 (December 2014): 104–8. http://dx.doi.org/10.4028/www.scientific.net/amm.721.104.

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In order to solve the process of fishing, hull has significant heave motion under the influence of marine environment, that caused towing tension instability and fishing low efficiency problems, proposed and developed based on the hydraulic cylinder and the accumulator between the energy conversion and PLC control of towing tension range controllable passive compensation device. According to its working principle, the passive compensation device of compensation system and control system was designed, using the hull heave motion as the control energy, hydraulic cylinder and accumulator combinat

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Andrews, Anthony P., and Robert Corletta. "A Brief History of Underwater Archaeology in the Maya Area." Ancient Mesoamerica 6 (1995): 101–17. http://dx.doi.org/10.1017/s0956536100002121.

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AbstractUnderwater archaeology in the Maya area during the twentieth century has gradually evolved from a avocational activity whose primary focus was on the recovery of artifacts to a subdiscipline with more focused professional concerns. The present synthesis outlines the history of underwater research throughout the Maya area, including projects at pre-Hispanic sites in the lowlands and highlands, as well as the exploration of offshore historic wrecks. It concludes with a brief assessment of the current state of this research.

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Bondyrev, V. E., S. I. Knyazev, V. I. Korolev, and S. F. Jatsun. "Small-size Unmanned Control Algorithm of an Underwater Complex." Proceedings of the Southwest State University 24, no. 4 (2021): 166–79. http://dx.doi.org/10.21869/2223-1560-2020-24-4-166-179.

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Purpose of research: The creation of water bodies monitoring systems makes it possible to evaluate environmental situation in various points of monitoring area quickly. One of the main stages of water quality research is sampling, which is currently carried out at stationary posts, which makes it impossible to ensure operational control in various areas of an observation site. The problem can be solved by using mobile robotic platforms. The purpose of this study is to create mathematical model and algorithm for controlling autonomous movement of an underwater robotic device for collecting wate

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Ren, An Min, and Lin He. "Research on the Performance of Suppressing Interference Using Double Stages Wiener Filter in Underwater Noise Measurement." Applied Mechanics and Materials 530-531 (February 2014): 544–49. http://dx.doi.org/10.4028/www.scientific.net/amm.530-531.544.

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Measured data of hydrophone array could be interfered by underwater noise,so its essential to enhance the performance of suppressing interference for adaptive array processing. How to improve the performance of Double Stages Wiener Filter was discussed based on configuration principles. The influences of interference angle, array unit number and interference-to-noise ratio (INR) to suppressing interference have been analyzed through principle analysis and simulation experiments under different circumstances, including single or multiple disturb signals. Experiments show that the performance of

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Ekkel, T., J. Schmik, T. Luhmann, and H. Hastedt. "PRECISE LASER-BASED OPTICAL 3D MEASUREMENT OF WELDING SEAMS UNDER WATER." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-5/W5 (April 9, 2015): 117–22. http://dx.doi.org/10.5194/isprsarchives-xl-5-w5-117-2015.

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This paper deals with the development of a measuring procedure and an experimental set-up (stereo camera system in combination with a projecting line laser and a positioning unit) which are intended to detect the surface topography, particularly of welds, with high accuracy in underwater environments. The system concept makes provision for the fact that the device can be positioned in space and manipulated by hand. The development, optimization and testing of the system components for surface measurements as well as calibration and accuracy evaluations are the main objectives within this resea

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Volodymyr, Blintsov, and Hrudinina Hanna. "MATHEMATICAL MODELING OF AUTONOMOUS UNDERWATER VEHICLE PROPULSION AND STEERING COMPLEX OPERATION IN OBLIQUE (BEVELED) WATER FLOW." Eastern-European Journal of Enterprise Technologies 4, no. 9 (100) (2019): 19–26. https://doi.org/10.15587/1729-4061.2019.176673.

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The research of nonlinear hydrodynamic characteristics of the propulsion and steering complex (PSC), which influence the accuracy of the plane trajectory motion of an autonomous underwater vehicle (AUV), is carried out. During the underwater vehicle curvilinear motion, its PSC operates in an oblique incident water flow. This leads to a decrease in the PSC thrust force and negatively affects the controlled trajectory motion of the underwater vehicle. The research was conducted for a specific type of AUV for the plane curvilinear motion mode. The mathematical modeling method was chosen as the re

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Wei, Jiangwei, Fawang Li, Shikuo Zhang, Hanlie Cheng, Qiang Qin, and David Cadasse. "Characteristics of Sedimentary Microfacies of Late Triassic Yanchang Formation in North-Central Ordos Basin." Journal of Chemistry 2022 (September 22, 2022): 1–10. http://dx.doi.org/10.1155/2022/1513503.

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Sedimentary microfacies refer to the smallest unit with unique rock structure, structure, thickness, rhythm, and other sedimentary characteristics and certain plane configuration rules in the subfacies zone. Sedimentary microfacies research is the most basic sedimentary unit formed in the same or basically the same sedimentary background. Sedimentary microfacies marks are the key to the division of sedimentary microfacies. If we cannot find effective marks, we cannot correctly divide sedimentary microfacies. These marks are mainly obtained from detailed observation of cores. On the premise of

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Wang, Tong, Zihao You, Wei Song, and Shiqiang Zhu. "Dynamic Analysis of an Underwater Cable-Driven Manipulator with a Fluid-Power Buoyancy Regulation System." Micromachines 11, no. 12 (2020): 1042. http://dx.doi.org/10.3390/mi11121042.

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This article presents an underwater cable-driven manipulator (UCDM) with a buoyancy regulation system (BRS), which is controlled by a fluid-power system. The manipulator consists of five sections, and each section is embedded with a buoyancy adjustment unit. By regulating buoyancy at each section, the static and dynamic states of the manipulator will be changed, promising a new operating mode of an underwater manipulator driven by buoyancy. In this article, a dynamic model of the manipulator is established by the Newton-Euler equation, considering cable tension, inter-joint force, buoyancy, wa

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Mei, Xinkui, Xiufen Ye, Xiaofeng Zhang, et al. "UIR-Net: A Simple and Effective Baseline for Underwater Image Restoration and Enhancement." Remote Sensing 15, no. 1 (2022): 39. http://dx.doi.org/10.3390/rs15010039.

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Because of the unique physical and chemical properties of water, obtaining high-quality underwater images directly is not an easy thing. Hence, recovery and enhancement are indispensable steps in underwater image processing and have therefore become research hotspots. Nevertheless, existing image-processing methods generally have high complexity and are difficult to deploy on underwater platforms with limited computing resources. To tackle this issue, this paper proposes a simple and effective baseline named UIR-Net that can recover and enhance underwater images simultaneously. This network us

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Sari, Dewi Mutiara, Bayu Sandi Marta, Muhammad Amin A, and Haryo Dwito Armono. "The Analysis of Underwater Imagery System for Armor Unit Monitoring Application." International Journal of Artificial Intelligence & Robotics (IJAIR) 5, no. 1 (2023): 1–12. http://dx.doi.org/10.25139/ijair.v5i1.5918.

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The placement of armor units for breakwaters in Indonesia is still done manually, which depends on divers in each placement of the armor unit. The use of divers is less effective due to limited communication between divers and excavator operators, making divers in the water take a long time. This makes the diver's job risky and expensive. This research presents a vision system to reduce the diver's role in adjusting the position of each armor unit. This vision system is built with two cameras connected to a mini-computer. This system has an image improvement process by comparing three methods.

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Gambin, Timmy, Maja Sausmekat, and Darko Kovacevic. "The Innovative and State of the Art Public Access Management of Malta’s Underwater Cultural Heritage." Heritage 4, no. 4 (2021): 3365–81. http://dx.doi.org/10.3390/heritage4040187.

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The obligation to preserve underwater cultural heritage is a core principle of the UNESCO Convention on the Protection of the Underwater Cultural Heritage. A key element of this obligation is a balance of scientific research, protection, and the promotion of responsible access to underwater cultural heritage sites. Such a balance requires the setting up of a network of communication between the tourism and heritage sectors on the one hand and the maritime and diving communities on the other hand. A variety of approaches have been developed to promote responsible access to underwater cultural h

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Che, Sai, Zhongguo Li, Zhou Shi, Miaowei Gao, and Hongchuan Tang. "Research on an underwater image segmentation algorithm based on YOLOv8." Journal of Physics: Conference Series 2644, no. 1 (2023): 012013. http://dx.doi.org/10.1088/1742-6596/2644/1/012013.

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Abstract Underwater image segmentation faces complex problems such as target type, number, scale, and environmental interference. The traditional segmentation method relies on much manual annotation and expertise, extracts only the surface information of the image, and has low segmentation accuracy and efficiency, so the image segmentation method based on deep learning is chosen. Deep learning algorithms are used on top of the YOLOv8, and the adaptive self-supervised learning (Convnext V2) module, the lightweight network (Slim Neck), and the dynamic sparse attention mechanism (bilevel routing

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Solon, Kimberly, Eveline I. P. Volcke, Mathieu Spérandio, and Mark C. M. van Loosdrecht. "Resource recovery and wastewater treatment modelling." Environmental Science: Water Research & Technology 5, no. 4 (2019): 631–42. http://dx.doi.org/10.1039/c8ew00765a.

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This paper discusses the extent to which new unit processes applied for resource recovery can be modelled with conventional ASMs, the additional modelling challenges being faced, while providing recommendations on how to address current modelling research gaps.

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Lyalyakin, V. P. "Restore the detail — important area of VIM research." Sel'skohozjajstvennaja tehnika: obsluzhivanie i remont (Agricultural Machinery: Service and Repair), no. 6 (June 30, 2024): 60–65. http://dx.doi.org/10.33920/sel-10-2406-010.

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The article presents the results of research scientists of the former Institute of Scien-tifi c Research Institute of the technological -ray hardening and recovery of parts, which in 1979 stood as an independent unit.

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Chinmay, Balodi, Shetty Anirudh, Bhandary Deeksha, Shetty Aditi, and S. Shivaprakasha K. "Underwater Remotely Operated Vehicles: A Survey." Journal of Remote Sensing GIS & Technology 5, no. 3 (2019): 18–22. https://doi.org/10.5281/zenodo.3560481.

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Underwater networks are becoming increasingly popular due to its increased applicability in the modern communication era. Underwater Remotely Operated Vehicles (ROVs) are highly manoeuvrable underwater robot that can find its application in military, commercial and scientific research. Many researchers have developed ROVs for underwater scenarios. Most of them are being application specific. This paper provides a qualitative analysis of the physical design, networking and movement control of ROV.

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Barclay, David R., and Najeem Shajahan. "Energy partitioning of the underwater soundscape." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A219. http://dx.doi.org/10.1121/10.0023336.

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A four-element three-dimensional hydrophone array has been deployed on the Strait of Georgia node of the Victoria Experimental Network Under the Sea (VENUS) since March 2020. To the present, continuous pressure time series data from the four sensors has been streamed ashore and made available by Ocean Networks Canada. A technique for classifying and partitioning ambient noise using the three-dimensional noise coherence function is applied to the recordings. The noise coherence (directionality) due to wind generated surface noise and individual ships is analytically modelled using measured envi

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Sutrisno, Avando Bastari, and Okol Sri Suharyo. "Analysis of underwater welding in Indonesian warship using low hydrogen electrodes." Global Journal of Engineering and Technology Advances 7, no. 3 (2021): 083–94. http://dx.doi.org/10.30574/gjeta.2021.7.3.0081.

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As a security unit for the territorial waters of the Republic of Indonesia, the Indonesian Navy is required for combat readiness to carry out security operations quickly and precisely. It is very important to the readiness of the Indonesian Navy's ABK Soldiers and the Republic of Indonesia's defense equipment for warships in carrying out security activities in the territorial waters of the Republic of Indonesia. This study discusses underwater wet welding in anticipating an emergency if the ship's hull is hit by a collision so that the hull has cracks or holes. This research method uses AH36 s

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Luo, Peng, Yuanjie Song, Xiaoyang Xu, et al. "Efficient Underwater Sensor Data Recovery Method for Real-Time Communication Subsurface Mooring System." Journal of Marine Science and Engineering 10, no. 10 (2022): 1491. http://dx.doi.org/10.3390/jmse10101491.

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Marine submerged buoys can effectively obtain various parameters of seawater, which plays an important role in the research of marine physical phenomena, marine environmental changes, and climate change. However, traditional self-contained submerged buoys usually work underwater at a depth of about 100 m, and the observation data cannot be obtained before their recovery, which cannot satisfy the needs of real-time data acquisition for marine scientific research. To solve this problem, this paper proposes a real-time communication subsurface mooring system that consists of a satellite communica

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Zhang, Jiyong, Xiaohu Sun, Chunhui Zhao, Zhichu Lei, Long Xie, and Donghui Liu. "Research on Sound velocity model construction method in GNSS-A underwater positioning." Journal of Physics: Conference Series 2863, no. 1 (2024): 012029. http://dx.doi.org/10.1088/1742-6596/2863/1/012029.

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Abstract GNSS-A technology is a submarine positioning technique used to establish ocean control networks, and its positioning results are primarily affected by errors in ocean sound velocity. To address this issue, this paper analyzes the spatial representativeness error of the weighted average sound velocity based on the GNSS-A positioning principle. It also explores the construction method of a sound velocity model in the time domain using the average sound velocity. A sinusoidal diurnal variation model for sound velocity is developed through expanded fitting. Finally, actual measured data i

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Huang, Can, and Qi Meng. "Real-time biomechanical feedback system for swimming turn analysis based on convolutional neural networks and temporal attention mechanism." Molecular & Cellular Biomechanics 22, no. 4 (2025): 1695. https://doi.org/10.62617/mcb1695.

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This paper presents an advanced deep learning framework that integrates convolutional neural networks (CNNs) with temporal attention mechanisms for real-time swimming turn analysis. The proposed architecture features a hybrid spatial-temporal design with multi-scale feature fusion and adaptive normalization, achieving robust performance in challenging underwater environments. The system demonstrates 96.2% accuracy in standard conditions and 91.8% accuracy under low-light scenarios, with a 15% improvement over existing methods. By optimizing computational complexity, the framework achieves 32 f

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Purnata, Hendi, Riyani Prima Dewi, Saepul Rahmat, Erna Alimudin, and Novita Asma Alahi. "Enhanced Depth Control and Stability in Submersible Pylon Inspection Robots Using IMU-Based Extended Kalman Filter and PID Control." Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) 11, no. 2 (2024): 224–34. http://dx.doi.org/10.33019/jurnalecotipe.v11i2.4523.

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The research developed a Submersible Pylon Inspection Robot (SPIR) to clean and inspect underwater structures automatically, facing challenges in stability and depth of operation. Integrating the Inertial Measurement Unit (IMU) with the Extended Kalman Filter (EKF), as well as implementing customized PID controls, aims to improve the accuracy and stability of SPIR in dynamic underwater environments. The results show that the SPIR control system can follow the reference depth at shallow depths well, but has difficulty maintaining stability at deeper depths. The position error graph on the Z-axi

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Milto, Olga, and Nikolay Amosov. "Condensing heat recovery unit use for operation efficiency increase of boiler units." Energy Systems 5, no. 1 (2020): 59–66. http://dx.doi.org/10.34031/es.2020.1.007.

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The article is dedicated to the research of operation efficiency increase of the boiler unit TGMP-344A by introducing the utilization unit into the technological scheme. The article considers the possibility of closed type condensing heat recovery unit use and utilization of an exhaust gas potential for raw water heating before a water treatment system at CHP.

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46

Sutrisno, Avando Bastari, and Sri Suharyo Okol. "Analysis of underwater welding in Indonesian warship using low hydrogen electrodes." Global Journal of Engineering and Technology Advances 7, no. 3 (2021): 083–94. https://doi.org/10.5281/zenodo.5052119.

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As a security unit for the territorial waters of the Republic of Indonesia, the Indonesian Navy is required for combat readiness to carry out security operations quickly and precisely. It is very important to the readiness of the Indonesian Navy's ABK Soldiers and the Republic of Indonesia's defense equipment for warships in carrying out security activities in the territorial waters of the Republic of Indonesia. This study discusses underwater wet welding in anticipating an emergency if the ship's hull is hit by a collision so that the hull has cracks or holes. This research method

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Zhang, Jin, Shengfan Zhu, and Shuai Kang. "Research on the Thrust Allocation Method for Straight-Line Sailing of Multiple AUVs in Tandem Connection." Applied Sciences 15, no. 8 (2025): 4106. https://doi.org/10.3390/app15084106.

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The relative motion and coupled dynamics between individual units in a Multiple AUVs in Tandem Connection (MATC) system make speed and inter-unit distance control particularly challenging, especially in large-scale configurations. This study proposes a novel hybrid thrust allocation method for steady straight-line sailing in MATC systems, addressing thrust constraints and unit coordination. First, the motion model of the MATC system was established based on Newton’s second law. Second, an improved Genetic Algorithm (GA) was developed to optimize thrust values for each unit in smaller configura

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Li, Yang, and Xiu Juan Liang. "Experimental Study on Energy Saving between Heat Pump Unit of Heat Recovery Fresh Air and Heat Pipe Heat Pump Low Temperature Heat Recovery Unit in the Cold and Severe Cold Regions." Applied Mechanics and Materials 535 (February 2014): 37–41. http://dx.doi.org/10.4028/www.scientific.net/amm.535.37.

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In the cold and severe cold regions of our country, the average temperature in winter outdoor usually below -20°C. Air conditioning units was limited and damaged when it running under such conditions. In order to solve the the problems pointed out previously, the paper put forward solutions of the fresh air handling units in combination with heat pump unit of heat recovery fresh air and heat pipe heat pump low temperature heat recovery unit. Comparison energy-saving and recovery period of the two method through experimental research.

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Li, Yon Gan, Hua Min Chen, Xue Lai Liu, and Wei Tao Luan. "Simulation on Resistance Characteristics of Air-to-Air Energy Recovery Equipment." Advanced Materials Research 243-249 (May 2011): 4975–78. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.4975.

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Through carried out computer simulation analysis on air-to-air energy recovery equipment，the analysis research mainly aims at pressure drop characteristics among the factors which influence the core of the heat exchanger，the results show that：as the plate spacing, plate width, plate height, as well as changes in a secondary air inlet velocity core，all of them will have different effects on the air-to-air energy recovery unit of the resistance loss, which is useful to air-to-air energy recovery unit to optimize the design.

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Mateen, Abdul, Muhammad Awais, Nadeem Javaid, Farruh Ishmanov, Muhammad Afzal, and Saqib Kazmi. "Geographic and Opportunistic Recovery with Depth and Power Transmission Adjustment for Energy-Efficiency and Void Hole Alleviation in UWSNs." Sensors 19, no. 3 (2019): 709. http://dx.doi.org/10.3390/s19030709.

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Underwater Wireless Sensor Networks (UWSNs) are promising and emerging frameworks having a wide range of applications. The underwater sensor deployment is beneficial; however, some factors limit the performance of the network, i.e., less reliability, high end-to-end delay and maximum energy dissipation. The provisioning of the aforementioned factors has become a challenging task for the research community. In UWSNs, battery consumption is inevitable and has a direct impact on the performance of the network. Most of the time energy dissipates due to the creation of void holes and imbalanced net

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