Xingkui Yan’s research while affiliated with National Marine Environmental Monitoring Center and other places

... Advanced sensor technologies have been introduced to address these challenges. Acoustic sensors, for example, use sound waves to detect and characterize biofouling based on changes in signal reflection (Kong et al., 2024). While effective, acoustic sensors are susceptible to environmental noise and require complex signal processing techniques to extract meaningful information. ...

Reference:

RegStack Machine Learning Model for Accurate Prediction of Tidal Stream Turbine Performance and Biofouling

... For example, Zhang et al. [22] proposed a ship object detection model based on the improved YOLOv5 algorithm, by using a bidirectional feature pyramid network and a coordinate attention technique, they were able to recognize ships more accurately; a ship detection method based on the YOLOX algorithm proposed by Liu et al. [23] improves the original model by introducing residual structures and CIOU loss functions; Wang et al. [24] proposed an enhanced YOLOv8 ship detection method based on multi-scale attention feature fusion. They integrated the asymptotic feature pyramid (AFPN) large selective kernel attention mechanism (LSK) and the fourth detection head into YOLOv8, dynamically adjusting its receptive field and enhancing the recognition representation of ships, greatly improving the performance of the model; Guo et al. [25] proposed a sea vessel detection target based on the YOLOv7 model, by integrating the lightweight architecture of MobileNetv1 and the innovative design of shallow feature fusion path, the performance of the object detection model has been significantly enhanced; Cheng et al. [26] proposed an improved lightweight ship detection model based on YOLOv8, which utilizes Faster-Net Block and EMA attention mechanism to balance lightweight and detection accuracy. Siddique et al. [27] proposed a novel scalar image with enhanced leakage enhancement. ...

Reference:

AFF-LightNet: A Lightweight Ship Detection Architecture Based on Attentional Feature Fusion

... Recent research has emphasized the importance of shape and mass distribution in determining hydrodynamic response. A comparative study of hydrodynamic performance in cylindrical and spherical wave buoys demonstrated that structural differences influence RAO values, affecting measurement accuracy and buoy response under wave conditions (Zheng et al., 2023). Similarly, experimental analyses on a biofouled wave buoy highlighted the impact of marine growth on buoy stability, revealing that biological fouling alters motion characteristics and affects data reliability over time (Islam et al., 2020). ...

Reference:

Seakeeping Performance and Hydrodynamic Response of an Ocean Buoy: A Model-Scale Investigation

... Compared with the sway motion, the surge motion is limited by the mooring layout, and waves from different directions have different effects on mooring tension and buoy movement. Chen et al. [20] proposed a high-stability self-counterweight transverse-tethered semi-submersible buoy structure that can effectively resist ocean currents with a horizontal transverse mooring system. The pitch of the buoy was less than 10 degrees under sea states of a 3-4 level. ...

Reference:

Estimation of the Motion Response of a Large Ocean Buoy in the South China Sea

... Yang C. et al. [12] employed CFD methods and an enhanced VOF technique on unstructured grids to simulate extreme wave interactions with LNG carriers with fully or partially filled tanks. Zheng S. et al. [13] conducted a comparative analysis of two common small-wave buoys-cylindrical and spherical. Using Inventor for 3D modeling and Maxsurf for stability analysis, they found that the spherical buoy exhibited higher stability and better wave-following performance, providing a foundation for subsequent structural design and theoretical research. ...

Reference:

Design and Multi-Objective Optimization of an Electric Inflatable Pontoon Amphibious Vehicle

... Research on underwater target detection is of significant importance in the fields of ocean current observation [30], marine biology and security [31]. To enhance the performance of improved YOLOv5, some researchers focus on improving the loss function and detection layer of the backbone module, while relying solely on conventional dataaugmentation techniques. ...

Reference:

An Improved YOLOv5-Based Underwater Object-Detection Framework

... Accurate classification of nighttime visibility is crucial for timely and effective implementation of related protective measures, reducing the occurrence of accidents, and playing an important role in social development [2]. Existing visibility estimation instruments mainly include forward-scattering visibility meters, which detect visibility based on atmospheric scattering principles [3]. However, issues such as high instrument cost, large size, and high maintenance expenses hinder the widespread deployment of these devices. ...

Reference:

Nighttime Visibility Classification Based on Stable Light Sources

... However, work related to ambient temperature and humidity measurements are rare. Only recently have several studies been conducted on LASbased ambient temperature [20] and humidity measurements [21][22][23]. For these state-of-the-art ambient water vapor sensors using LAS, absorption transitions near 7181.16 ...

Reference:

Transfer-learning-based multi-wavelength laser sensor for high fidelity and real-time monitoring of ambient temperature and humidity

... This structure uses the C-type structure to excite birefringence at the core of the grating (Figure 5a) and to improve the temperature sensitivity by filling the pores with thermal sensitive material. Pressure sensitivity of the sensor is −1.709 nm/MPa in the pressure range of 0-10 MPa, and temperature sensitivity is 1.054 nm/ • C in the temperature range of 0-40 • C. Besides, Zhao et al. designed an ocean temperature−depth profile measuring instrument with FBG-LPG cascade structure in 2017, which laid a foundation for its application in the marine environment [112,113]. ...

Reference:

Review of Optical Fiber Sensors for Temperature, Salinity, and Pressure Sensing and Measurement in Seawater