Fish object detection and counting in pelagic fisheries face many challenges complex environments. Sonar imaging technology offers a solution because it generates high-resolution images underwater. In this paper, we propose sonar-based fish method using an improved YOLOv8 combined with BoT-SORT to address issues such as missed detection, false low accuracy caused by factors equipment motion, light changes, background noise The algorithm utilizes the techniques of lightweight upsampling...

As the restaurant industry is facing labor shortage issues, use of meal delivery robots instead waiters/waitresses not only allows customers to experience impact robot technology but also benefits business financially by reducing costs. Most existing employ magnetic navigation technologies, which require strip installation and changes decor. Once moving path changed, strips need be re-laid. This study proposes multisource information fusion, i.e., fusion ultra-wide band positioning with an...

Global Navigation Satellite System (GNSS) provides accurate positioning data for vehicular navigation in open outdoor environment. In an indoor environment, Light Detection and Ranging (LIDAR) Simultaneous Localization Mapping (SLAM) establishes a two-dimensional map data. However, LIDAR can only provide relative it cannot directly the latitude longitude of current position. As consequence, GNSS/Inertial (INS) integrated could be employed outdoors, while indoors part makes use INS/LIDAR...

A yellow-orange nitrogen-doped zinc oxide (ZnO:N) film was deposited on a quartz glass substrate at 510K by reactive radio-frequency magnetron sputtering of ZnO target with gas nitrogen. The lattice constants the as-grown ZnO:N are much larger than those undoped ZnO, and decrease increasing annealing temperature due to escape nitrogen from tensile stress, accompanied color change pale yellow. occupies two chemical environments in based x-ray photoelectron spectroscopy measurement. One is NO...

Object extraction is an important tool in many applications within the image processing and computer vision communities. You Only Look Once version 3 (YOLOv3) has been extensively applied to fields as a state-of-the-art technique for object semantic detection. Despite its numerous characteristics, YOLOv3 be combined with appropriate segmentation technologies achieve effective 2D real-time monitoring, robot navigation, target search. In this article, K-means algorithm of depth images....

Robot navigation is a fundamental problem in robotics and various approaches have been developed to cope with this problem. Despite the great success of previous approaches, learning-based methods are receiving growing interest research community. They shown efficiency solving tasks offer considerable promise build intelligent systems. This paper presents goal-directed robot system that integrates global planning based on end-to-end learning local reinforcement (RL). The proposed aims...

A lithium (Li) and nitrogen (N) dual-doped p-type ZnO film (ZnO : (Li,N)) was deposited on c-plane sapphire by RF-magnetron sputtering of Zn–2 at.% Li alloy using mixed gases oxygen then annealing in N2 flow. It has a carrier concentration 3.07 × 1016 cm−3 Hall mobility 1.74 cm2 V−1 s−1. XPS measurement shows that there are LiZn–N complexes the (Li,N), which demonstrated photoluminescence measured at various temperatures different excitation powers to be acceptors responsible for...

Pipeline is one of the most important tools to transport gases or liquid substances from starting point destination. There are large numbers small diameter pipelines under urban areas, which require be inspected regularly prevent their leakage. Inspection Gauge (PIG) carries pipeline defects detection sensors and localization discover corresponding positions by its spiral motion inside pipeline. The low-accuracy property Micro-Electro-Mechanical System (MEMS) based inertial main limitation...

This paper investigates an anticipatory activation anti-windup approach based on Linear Active Disturbance Rejection Control (LADRC) to address the influences of accelerated saturation actuators in a Miniaturized Inertial Stabilized Platform (MISP) with extreme external disturbance. The proposed method aims eliminate high-frequency vibrations Line Sight (LOS) electro-optical devices during actuator saturation. To achieve this, Extended State Observer (LESO) is modified by adding feedback...

LiDAR-based simultaneous localization and mapping (SLAM) offer robustness against illumination changes, but the inherent sparsity of LiDAR point clouds poses challenges for continuous tracking navigation, especially in feature-deprived scenarios. This paper proposes a novel LiDAR/SINS tightly integrated SLAM algorithm designed to address urban environments characterized sparse structural features. Firstly, method extracts edge points from cloud using traditional segmentation clusters them...

Zn 1 − x Mg O films were grown by radio-frequency reactive magnetron sputtering using mixture of nitrogen and argon as gases. It was found that concentration, structures, electrical properties, band gaps the can be tuned changing partial pressure ratio The Zn1−xMgxO film consists wurtzite phase at ratios from 0% to 50%, cubic phases 78% 83%, 100%. concentration increased linearly with increasing ratio. gap increases 3.64eV x=0.172to4.02eV x=0.44 for reaches 6.30eV x=0.84. All as-grown show...

An accelerometer-based gyro drift compensation approach in a dual-axial stabilization platform is introduced this paper. The consists of framework, drive motor, and accelerometer module contorl board. Gyro an angular rate detecting element to achieve rotation angle the dynamic system. However, system has unstable factor because gyro. main contribution paper implement convenient by using accelerometer. In contrast kalman filtering method, simpler practical due high-precision characteristic...

To solve the self-alignment problem of Strapdown Inertial Navigation System (SINS), a novel adaptive filter based on Complementary Ensemble Empirical Mode Decomposition (CEEMD) is proposed. The Gravitational Apparent Motion (GAM) used in coarse alignment, and obtaining attitude matrix between body frame navigation attributed to initial current using two gravitational apparent motion vectors at different moments. However, accuracy time this alignment method always suffer from measurement...

Based on the 3D Reduced Inertial Sensor System (3D-RISS) and Machine Learning Enhanced Visual Data (MLEVD), an integrated vehicle navigation system is proposed in this paper. In demanding conditions such as outdoor satellite signal interference indoor navigation, work incorporates smooth navigation. Firstly, a landmark set up both of its size position are accurately measured. Secondly, image with information captured quickly by using machine learning. Thirdly, template matching method...

Supercavitation technology can greatly improve the speed of underwater vehicles by reducing drag. However, time-delay characteristic a supercavitating vehicle presents control challenge. In this paper, linear parameter-varying (LPV) model for is established analysing characteristics planing force. Moreover, considering that cavitation radius easily perturbed external disturbances, LPV delay depicted as polytope established. Based on model, predictive controller based designed. The solve...

Visual Simultaneous Localization and Mapping (SLAM) technologies based on point features achieve high positioning accuracy complete map construction. However, despite their time efficiency accuracy, such SLAM systems are prone to instability even failure in poor texture environments. In this paper, line integrated with enhance the robustness reliability of stereo Firstly, method Edge Drawing lines (EDlines) is applied reduce feature detection time. Meanwhile, proposed improves by eliminating...

Improving the performance of interferometric fiber optic gyroscope (IFOG) in harsh environments, such as magnetic field and temperature variation, is necessary for its practical applications. This paper presents an investigation Faraday effect-induced bias error IFOG under varying temperature. Jones matrix method utilized to formulize dependence error. Theoretical results show that changes with non-skeleton polarization maintaining (PM) coil. phenomenon caused by linear birefringence Verdet...