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Total 2011 results found since Jan 2013.

Sensors, Vol. 23, Pages 6379: IoTTPS: Ensemble RKSVM Model-Based Internet of Things Threat Protection System
This study aims to propose an IoT threat protection system (IoTTPS) to protect the IoT network from threats using an ensemble model RKSVM, comprising a random forest (RF), K nearest neighbor (KNN), and support vector machine (SVM) model. The software-defined networks (SDN)-based IoT network datasets such as KDD cup 99, NSL-KDD, and CICIDS are used for threat detection based on machine learning. The experimental phase is conducted by using a decision tree (DT), logistic regression (LR), Naive Bayes (NB), RF, SVM, gradient boosting machine (GBM), KNN, and the proposed ensemble RKSVM model. Furthermore, performance is optimiz...
Source: Sensors - July 13, 2023 Category: Biotechnology Authors: Urooj Akram Wareesa Sharif Mobeen Shahroz Muhammad Faheem Mushtaq Daniel Gavilanes Aray Ernesto Bautista Thompson Isabel de la Torre Diez Sirojiddin Djuraev Imran Ashraf Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6367: An Interface Setup Optimization Method Using a Throughput Estimation Model for Concurrently Communicating Access Points in a Wireless Local Area Network
Shihao Fang The IEEE 802.11 wireless local-area network (WLAN) has been deployed around the globe as a major Internet access medium due to its low cost and high flexibility and capacity. Unfortunately, dense wireless networks can suffer from poor performance due to high levels of radio interference resulting from adjoining access points (APs). To address this problem, we studied the AP transmission power optimization method, which selects the maximum or minimum power supplied to each AP so that the average signal-to-interference ratio (SIR) among the concurrently communicating APs is maximized.However, this method requ...
Source: Sensors - July 13, 2023 Category: Biotechnology Authors: Fatema Akhter Nobuo Funabiki Ei Ei Htet Bin Wu Dezheng Kong Shihao Fang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6363: Low-Complexity Joint Angle of Arrival and Time of Arrival Estimation of Multipath Signal in UWB System
i Zhang In an ultra-wideband (UWB) system, the two-dimensional (2D) multiple signal classification (MUSIC) algorithms based on high-precision 2D spectral peak search can jointly estimate the time of arrival (TOA) and angle of arrival (AOA). However, the computational complexity of 2D-MUSIC is very high, and the corresponding data model is only based on the dual antennas. To solve these problems, a low-complexity algorithm for joint AOA and TOA estimation of the multipath ultra-wideband signal is proposed. Firstly, the dual antenna sensing data model is extended to the antenna array case. Then, based on the array-sensin...
Source: Sensors - July 13, 2023 Category: Biotechnology Authors: Weiming Deng Jianfeng Li Yawei Tang Xiaofei Zhang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6352: Reusable SERS Substrates Based on Gold Nanoparticles for Peptide Detection
In this study, we address this challenge by demonstrating the deposition of core–shell nanoparticles consisting of a gold core and a thin inert SiO2 shell within a confined space, resulting in the formation of a highly efficient Raman-enhancing structure. Nanoparticles were characterized by UV–vis spectroscopy, dynamic light scattering, and total reflectance X-ray fluorescence spectroscopy, whereas the prepared substrates were characterized by scanning electron microscopy and Raman spectroscopy with a model molecule, malachite green. The relationship between Raman intensity and the loading of ma...
Source: Sensors - July 13, 2023 Category: Biotechnology Authors: Zhang Qi Timur Akhmetzhanov Arina Pavlova Evgeny Smirnov Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6303: Multi-Objective Optimization Method for Signalized Intersections in Intelligent Traffic Network
Rui Men Urban intersections are one of the most common sources of traffic congestion. Especially for multiple intersections, an appropriate control method should be able to regulate the traffic flow within the control area. The intersection signal-timing problem is crucial for ensuring efficient traffic operations, with the key issues being the determination of a traffic model and the design of an optimization algorithm. So, an optimization method for signalized intersections integrating a multi-objective model and an NSGAIII-DAE algorithm is established in this paper. Firstly, the multi-objective model is constructe...
Source: Sensors - July 11, 2023 Category: Biotechnology Authors: Xinghui Zhang Xiumei Fan Shunyuan Yu Axida Shan Rui Men Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6261: Optimized Back Propagation Neural Network Using Quasi-Oppositional Learning-Based African Vulture Optimization Algorithm for Data Fusion in Wireless Sensor Networks
s A Wireless Sensor Network (WSN) is a group of autonomous sensors geographically distributed for environmental monitoring and tracking purposes. Since the sensors in the WSN have limited battery capacity, the energy efficiency is considered a challenging task because of redundant data transmission and inappropriate routing paths. In this research, a Quasi-Oppositional Learning (QOL)-based African Vulture Optimization Algorithm (AVOA), referred to as QAVOA, is proposed for an effective data fusion and cluster-based routing in a WSN. The QAVOA-based Back Propagation Neural Network (BPNN) is developed to optimize the wei...
Source: Sensors - July 9, 2023 Category: Biotechnology Authors: Alaa A. Qaffas Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6231: Intelligent Drone Positioning via BIC Optimization for Maximizing LPWAN Coverage and Capacity in Suburban Amazon Environments
ºjo This paper aims to provide a metaheuristic approach to drone array optimization applied to coverage area maximization of wireless communication systems, with unmanned aerial vehicle (UAV) base stations, in the context of suburban, lightly to densely wooded environments present in cities of the Amazon region. For this purpose, a low-power wireless area network (LPWAN) was analyzed and applied. LPWAN are systems designed to work with low data rates but keep, or even enhance, the extensive area coverage provided by high-powered networks. The type of LPWAN chosen is LoRa, which operates at an unlicensed spectrum of 915...
Source: Sensors - July 7, 2023 Category: Biotechnology Authors: Fl ávio Henry Cunha da Silva Ferreira Mi ércio Cardoso de Alcântara Neto Fabr ício José Brito Barros Jasmine Priscyla Leite de Ara újo Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6222: Acoustic Lung Imaging Utilized in Continual Assessment of Patients with Obstructed Airway: A Systematic Review
Ali Imran Smart respiratory therapy is enabled by continual assessment of lung functions. This systematic review provides an overview of the suitability of equipment-to-patient acoustic imaging in continual assessment of lung conditions. The literature search was conducted using Scopus, PubMed, ScienceDirect, Web of Science, SciELO Preprints, and Google Scholar. Fifteen studies remained for additional examination after the screening process. Two imaging modalities, lung ultrasound (LUS) and vibration imaging response (VRI), were identified. The most common outcome obtained from eleven studies was positive observations ...
Source: Sensors - July 7, 2023 Category: Biotechnology Authors: Chang-Sheng Lee Minghui Li Yaolong Lou Qammer H. Abbasi Muhammad Ali Imran Tags: Review Source Type: research

Sensors, Vol. 23, Pages 6215: Infrared Image-Enhancement Algorithm for Weak Targets in Complex Backgrounds
Chao Wang Infrared small-target enhancement in complex contexts is one of the key technologies for infrared search and tracking systems. The effect of enhancement directly determines the reliability of the monitoring equipment. To address the problem of the low signal-to-noise ratio of small infrared moving targets in complex backgrounds and the poor effect of traditional enhancement algorithms, an accurate enhancement method for small infrared moving targets based on two-channel information is proposed. For a single frame, a modified curvature filter is used in the A channel to weaken the background while an improve...
Source: Sensors - July 7, 2023 Category: Biotechnology Authors: Yingchao Li Lianji Ma Shuai Yang Qiang Fu Hongyu Sun Chao Wang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6214: Transmission Line-Planning Method Based on Adaptive Resolution Grid and Improved Dijkstra Algorithm
uiqing Xu An improved Dijkstra algorithm based on adaptive resolution grid (ARG) is proposed to assist manual transmission line planning, shorten the construction period and achieve lower cost and higher efficiency of line selection. Firstly, the semantic segmentation network is used to change the remote sensing image into a ground object-identification image and the grayscale image of the ground object-identification image is rasterized. The ARG map model is introduced to greatly reduce the number of redundant grids, which can effectively reduce the time required to traverse the grids. Then, the Dijkstra algorithm is ...
Source: Sensors - July 7, 2023 Category: Biotechnology Authors: Guojun Nan Zhuo Liu Haibo Du Wenwu Zhu Shuiqing Xu Tags: Communication Source Type: research

Sensors, Vol. 23, Pages 6119: Systematic and Comprehensive Review of Clustering and Multi-Target Tracking Techniques for LiDAR Point Clouds in Autonomous Driving Applications
Regazzoni Autonomous vehicles (AVs) rely on advanced sensory systems, such as Light Detection and Ranging (LiDAR), to function seamlessly in intricate and dynamic environments. LiDAR produces highly accurate 3D point clouds, which are vital for the detection, classification, and tracking of multiple targets. A systematic review and classification of various clustering and Multi-Target Tracking (MTT) techniques are necessary due to the inherent challenges posed by LiDAR data, such as density, noise, and varying sampling rates. As part of this study, the Preferred Reporting Items for Systematic Reviews and Meta-Analyses ...
Source: Sensors - July 3, 2023 Category: Biotechnology Authors: Muhammad Adnan Giulia Slavic David Martin Gomez Lucio Marcenaro Carlo Regazzoni Tags: Review Source Type: research

Sensors, Vol. 23, Pages 6114: A Multichannel Fluorescent Array Sensor for Discrimination of Different Types of Drug-Induced Kidney Injury
Jiangwei Tian The differences in urinary proteins could provide a novel opportunity to distinguish the different types of drug-induced kidney injury (DIKI). In this research, Au nanoparticles–polyethyleneimine (AuNPs–PEI) and the three fluorophore-labeled proteins (FLPs) have been constructed as a multichannel fluorescent array sensor via electrostatic interaction, which was used to detect the subtle changes in urine collected from the pathological state of DIKI. Once the urine from different types of DIKI was introduced, the binding equilibrium between AuNPs–PEI and FLPs wou...
Source: Sensors - July 3, 2023 Category: Biotechnology Authors: Kunhui Sun Bing Wang Jiaoli Lin Lei Han Meifang Li Ping Wang Xiean Yu Jiangwei Tian Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6101: An Improved Distributed Sampling PPO Algorithm Based on Beta Policy for Continuous Global Path Planning Scheme
n Zhang Traditional path planning is mainly utilized for path planning in discrete action space, which results in incomplete ship navigation power propulsion strategies during the path search process. Moreover, reinforcement learning experiences low success rates due to its unbalanced sample collection and unreasonable design of reward function. In this paper, an environment framework is designed, which is constructed using the Box2D physics engine and employs a reward function, with the distance between the agent and arrival point as the main, and the potential field superimposed by boundary control, obstacles, and ar...
Source: Sensors - July 2, 2023 Category: Biotechnology Authors: Qianhao Xiao Li Jiang Manman Wang Xin Zhang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6086: A Compact Ultra-Wideband Monocone Antenna with Folded Shorting Wires for Vehicle-to-Everything (V2X) Applications
athan Jeong In this paper, a capacitively-fed, ultra-wideband (UWB), and low-profile monocone antenna is proposed for vehicle-to-everything (V2X) applications. The proposed antenna consists of a monocone design with an inner set of vias. Additionally, an outer ring is added with a small gap from the monocone and shorted with six folded wires of different lengths to extend the operating band. The proposed antenna covers the frequency range from 0.75 GHz to 7.6 GHz and has a 164% fractional bandwidth, with a gain value varying between 2 and 10 dBi. The dimensions of the antenna are 0.37λL &...
Source: Sensors - July 1, 2023 Category: Biotechnology Authors: Martin Wooseop Lee Feras Abushakra Zachary Choffin Sangkil Kim Hee-Jo Lee Nathan Jeong Tags: Article Source Type: research

Sensors, Vol. 23, Pages 6082: Particle Swarm Algorithm Path-Planning Method for Mobile Robots Based on Artificial Potential Fields
In this study, an artificial potential field-based particle swarm algorithm (apfrPSO) was proposed. First, the method generates robot planning paths by adjusting the inertia weight parameter and ranking the position vector of particles (rPSO), and second, the artificial potential field method is introduced. Through comparative numerical experiments with other state-of-the-art algorithms, the results show that the algorithm proposed was very competitive.
Source: Sensors - July 1, 2023 Category: Biotechnology Authors: Li Zheng Wenjie Yu Guangxu Li Guangxu Qin Yunchuan Luo Tags: Article Source Type: research