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Total 1395 results found since Jan 2013.

Sensors, Vol. 23, Pages 7472: A Real-Time Path Planning Method for Urban Low-Altitude Logistics UAVs
Peng To solve the problem of poor real-time performance in path planning algorithms for unmanned aerial vehicles (UAVs) in low-altitude urban logistics, a path planning method combining modified Beetle Antennae Search (BAS) with the Simulated Annealing (SA) algorithm is proposed. Firstly, based on the requirements of task execution and constraints of UAV flight, a fitness function for real-time search of waypoints is designed while ensuring the safety and obstacle avoidance of the UAV. Then, to improve the search accuracy and real-time performance, determining the initial search direction in the BAS algorithm is impro...
Source: Sensors - August 28, 2023 Category: Biotechnology Authors: Minyi Deng Qingqing Yang Yi Peng Tags: Technical Note Source Type: research

Sensors, Vol. 23, Pages 7421: Smooth Autonomous Patrolling for a Differential-Drive Mobile Robot in Dynamic Environments
vić Today, mobile robots have a wide range of real-world applications where they can replace or assist humans in many tasks, such as search and rescue, surveillance, patrolling, inspection, environmental monitoring, etc. These tasks usually require a robot to navigate through a dynamic environment with smooth, efficient, and safe motion. In this paper, we propose an online smooth-motion-planning method that generates a smooth, collision-free patrolling trajectory based on clothoid curves. Moreover, the proposed method combines global and local planning methods, which are suitable for changing large environments and en...
Source: Sensors - August 25, 2023 Category: Biotechnology Authors: Ana Šelek Marija Seder Ivan Petrovi ć Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7407: Sensor Selection for Tidal Volume Determination via Linear Regression & mdash;Impact of Lasso versus Ridge Regression
Sensors, Vol. 23, Pages 7407: Sensor Selection for Tidal Volume Determination via Linear Regression—Impact of Lasso versus Ridge Regression Sensors doi: 10.3390/s23177407 Authors: Bernhard Laufer Paul D. Docherty Rua Murray Sabine Krueger-Ziolek Nour Aldeen Jalal Fabian Hoeflinger Stefan J. Rupitsch Leonhard Reindl Knut Moeller The measurement of respiratory volume based on upper body movements by means of a smart shirt is increasingly requested in medical applications. This research used upper body surface motions obtained by a motion capture system, and two regression methods to determin...
Source: Sensors - August 25, 2023 Category: Biotechnology Authors: Bernhard Laufer Paul D. Docherty Rua Murray Sabine Krueger-Ziolek Nour Aldeen Jalal Fabian Hoeflinger Stefan J. Rupitsch Leonhard Reindl Knut Moeller Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7370: A White Shark Equilibrium Optimizer with a Hybrid Deep-Learning-Based Cybersecurity Solution for a Smart City Environment
d S. Salama Smart grids (SGs) play a vital role in the smart city environment, which exploits digital technology, communication systems, and automation for effectively managing electricity generation, distribution, and consumption. SGs are a fundamental module of smart cities that purpose to leverage technology and data for enhancing the life quality for citizens and optimize resource consumption. The biggest challenge in dealing with SGs and smart cities is the potential for cyberattacks comprising Distributed Denial of Service (DDoS) attacks. DDoS attacks involve overwhelming a system with a huge volume of traffic, c...
Source: Sensors - August 24, 2023 Category: Biotechnology Authors: Latifah Almuqren Sumayh S. Aljameel Hamed Alqahtani Saud S. Alotaibi Manar Ahmed Hamza Ahmed S. Salama Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7398: Multi-UAV Collaborative Search and Attack Mission Decision-Making in Unknown Environments
ng Fu To address the challenge of coordinated combat involving multiple UAVs in reconnaissance and search attacks, we propose the Multi-UAV Distributed Self-Organizing Cooperative Intelligence Surveillance and Combat (CISCS) strategy. This strategy employs distributed control to overcome issues associated with centralized control and communication difficulties. Additionally, it introduces a time-constrained formation controller to address the problem of unstable multi-UAV formations and lengthy formation times. Furthermore, a multi-task allocation algorithm is designed to tackle the issue of allocating multiple tasks t...
Source: Sensors - August 24, 2023 Category: Biotechnology Authors: Zibin Liang Qing Li Guodong Fu Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7359: Designing UAV Swarm Experiments: A Simulator Selection and Experiment Design Process
This study describes the crucial requirement for comprehensive experimental design of UAV swarm systems before their deployment in real-world scenarios. To achieve this, we begin with a concise review of existing simulation platforms, assessing their suitability for various specific needs. Through this evaluation, we identify the most appropriate tools to facilitate one’s research objectives. Subsequently, we present an experimental design process tailored for validating the resilience and performance of UAV swarm systems for accomplishing the desired objectives. Furthermore, we explore strategies to simulate...
Source: Sensors - August 23, 2023 Category: Biotechnology Authors: Abhishek Phadke F. Antonio Medrano Chandra N. Sekharan Tianxing Chu Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7324: RFID Backscatter Based Sport Motion Sensing Using ECOC-Based SVM
Hua With the advent of the 5G era, radio frequency identification (RFID) has been widely applied in various fields as one of the key technologies for the Internet of Things (IoT) to realize the Internet of Everything (IoE). In recent years, RFID-based motion sensing has emerged as an important research area with great potential for development. In this paper, an RFID backscatter sport motion sensing scheme is proposed, which effectively solves the multi-classification problem by using the received signal strength (RSS) of the backscattered RFID and the error correcting output coding (ECOC)-based support vector machine ...
Source: Sensors - August 22, 2023 Category: Biotechnology Authors: Lei Han Xia Hua Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7311: Coarse-to-Fine Localization for Detecting Misalignment State of Angle Cocks
ua Li The state of angle cocks determines the air connectivity of freight trains, and detecting their state is helpful to improve the safety of the running trains. Although the current research for fault detection of angle cocks has achieved high accuracy, it only focuses on the detection of the closed state and non-closed state and treats them as normal and abnormal states, respectively. Since the non-closed state includes the fully open state and the misalignment state, while the latter may lead to brake abnormally, it is very necessary to further detect the misalignment state from the non-closed state. In this paper...
Source: Sensors - August 22, 2023 Category: Biotechnology Authors: Hengda Lei Li Cao Xiuhua Li Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7292: Human Activity Recognition via Score Level Fusion of Wi-Fi CSI Signals
In this study, we investigate a score-level fusion structure for human activity recognition using the Wi-Fi channel state information (CSI) signals. The raw CSI signals undergo an important preprocessing stage before being classified using conventional classifiers at the first level. The output scores of two conventional classifiers are then fused via an analytic network that does not require iterative search for learning. Our experimental results show that the fusion provides good generalization and a shorter learning processing time compared with state-of-the-art networks.
Source: Sensors - August 21, 2023 Category: Biotechnology Authors: Gunsik Lim Beomseok Oh Donghyun Kim Kar-Ann Toh Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7264: Unmanned Ariel Vehicle (UAV) Path Planning for Area Segmentation in Intelligent Landmine Detection Systems
This study presents a framework for autonomous UAV-based landmine detection to determine the coverage route for scanning the target area. It is performed by extracting the area of interest using segmentation based on deep learning and then constructing the coverage route plan for the aerial survey. Multiple coverage path patterns are used to identify the ideal UAV route. The effectiveness of the suggested framework is evaluated using several target areas of differing sizes and complexities.
Source: Sensors - August 18, 2023 Category: Biotechnology Authors: Ahmed Barnawi Krishan Kumar Neeraj Kumar Nisha Thakur Bander Alzahrani Amal Almansour Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7199: A Hybrid Indoor Positioning System Based on Visible Light Communication and Bluetooth RSS Trilateration
wad Indoor positioning has become an attractive research topic because of the drawbacks of the global navigation satellite system (GNSS), which cannot detect accurate locations within indoor areas. Radio-based positioning technologies are one major category of indoor positioning systems. Another major category consists of visible light communication-based solutions, as they have become a revolutionary technology for indoor positioning in recent years. The proposed study intends to make use of both technologies by creating a hybrid indoor positioning system that uses VLC and Bluetooth together. The system first collects...
Source: Sensors - August 16, 2023 Category: Biotechnology Authors: Lamya Albraheem Sarah Alawad Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7135: Dynamic Adaptation Attack Detection Model for a Distributed Multi-Access Edge Computing Smart City
Kamel The internet of things (IoT) technology presents an intelligent way to improve our lives and contributes to many fields such as industry, communications, agriculture, etc. Unfortunately, IoT networks are exposed to many attacks that may destroy the entire network and consume network resources. This paper aims to propose intelligent process automation and an auto-configured intelligent automation detection model (IADM) to detect and prevent malicious network traffic and behaviors/events at distributed multi-access edge computing in an IoT-based smart city. The proposed model consists of two phases. The first phase...
Source: Sensors - August 12, 2023 Category: Biotechnology Authors: Nouf Saeed Alotaibi Hassan Ibrahim Ahmed Samah Osama M. Kamel Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7129: End-Cloud Collaboration Navigation Planning Method for Unmanned Aerial Vehicles Used in Small Areas
long He Unmanned aerial vehicle (UAV) collaboration has become the main means of indoor and outdoor regional search, railway patrol, and other tasks, and navigation planning is one of the key, albeit difficult, technologies. The purpose of UAV navigation planning is to plan reasonable trajectories for UAVs to avoid obstacles and reach the task area. Essentially, it is a complex optimization problem that requires the use of navigation planning algorithms to search for path-point solutions that meet the requirements under the guide of objective functions and constraints. At present, there are autonomous navigation modes ...
Source: Sensors - August 11, 2023 Category: Biotechnology Authors: Huajie Xiong Baoguo Yu Qingwu Yi Chenglong He Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7062: User Pairing for Delay-Limited NOMA-Based Satellite Networks with Deep Reinforcement Learning
Yuli Wang In this paper, we investigate a user pairing problem in power domain non-orthogonal multiple access (NOMA) scheme-aided satellite networks. In the considered scenario, different satellite applications are assumed with various delay quality-of-service (QoS) requirements, and the concept of effective capacity is employed to characterize the effect of delay QoS limitations on achieved performance. Based on this, our objective was to select users to form a NOMA user pair and utilize resource efficiently. To this end, a power allocation coefficient was firstly obtained by ensuring that the achieved capacity of use...
Source: Sensors - August 9, 2023 Category: Biotechnology Authors: Qianfeng Zhang Kang An Xiaojuan Yan Hongxia Xi Yuli Wang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 7052: Reconfiguration Error Correction Model for an FBG Shape Sensor Based on the Sparrow Search Algorithm
Liu A reconfiguration error correction model for an FBG shape sensor (FSS) is proposed. The model includes curvature, bending direction error correction, and the self-correction of the FBG placement angle and calibration error based on an improved sparrow search algorithm (SSA). SSA could automatically correct the placement angle and calibration direction of the FBG, and then use the corrected placement angle and calibration direction to correct the curvature and bending direction of the FSS, thereby improving the accuracy of shape reconfiguration. After error correction, the tail point reconfiguration errors of differ...
Source: Sensors - August 9, 2023 Category: Biotechnology Authors: Qiufeng Shang Feng Liu Tags: Article Source Type: research