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Total 1395 results found since Jan 2013.

Sensors, Vol. 23, Pages 5830: Channel State Information Based Indoor Fingerprinting Localization
hen Indoor localization is one of the key techniques for location-based services (LBSs), which play a significant role in applications in confined spaces, such as tunnels and mines. To achieve indoor localization in confined spaces, the channel state information (CSI) of WiFi can be selected as a feature to distinguish locations due to its fine-grained characteristics compared with the received signal strength (RSS). In this paper, two indoor localization approaches based on CSI fingerprinting were designed: amplitude-of-CSI-based indoor fingerprinting localization (AmpFi) and full-dimensional CSI-based indoor fingerpr...
Source: Sensors - June 22, 2023 Category: Biotechnology Authors: Rongjie Che Honglong Chen Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5819: A Deep Learning Model with Signal Decomposition and Informer Network for Equipment Vibration Trend Prediction
Tian Accurate equipment operation trend prediction plays an important role in ensuring the safe operation of equipment and reducing maintenance costs. Therefore, monitoring the equipment vibration and predicting the time series of the vibration trend is one of the effective means to prevent equipment failures. In order to reduce the error of equipment operation trend prediction, this paper proposes a method for equipment operation trend prediction based on a combination of signal decomposition and an Informer prediction model. Aiming at the problem of high noise in vibration signals, which makes it difficult to obtain...
Source: Sensors - June 22, 2023 Category: Biotechnology Authors: Huiyun Wang Maozu Guo Le Tian Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5791: Relay Selection for Dual-Hop Cooperative Ambient Backscatter Communication Systems
Wang Previous works only focus on the optimization design for the dual-hop cooperative ambient backscatter communication (AmBC) system with single-relay selection. The impact of relay selection on the outage performance of dual-hop cooperative AmBC systems is still missing. Motivated by this, in this paper, we investigate the outage performance of a dual-hop cooperative AmBC system with single-relay selection, where the backscatter link shares the receiver with the cellular link and the harmful direct-link interference (DLI) is mitigated by using successive interference cancellation (SIC). In the system considered, th...
Source: Sensors - June 21, 2023 Category: Biotechnology Authors: Ping Yang Weichao Kuang Shanjin Wang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5779: A Multi-Target Localization and Vital Sign Detection Method Using Ultra-Wide Band Radar
Xinlei Jia Life detection technology using ultra-wideband (UWB) radar is a non-contact, active detection technology, which can be used to search for survivors in disaster rescues. The existing multi-target detection method based on UWB radar echo signals has low accuracy and has difficulty extracting breathing and heartbeat information at the same time. Therefore, this paper proposes a new multi-target localization and vital sign detection method using ultra-wide band radar. A target recognition and localization method based on permutation entropy (PE) and K means++ clustering is proposed to determine the number and...
Source: Sensors - June 21, 2023 Category: Biotechnology Authors: Jingwen Zhang Qingjie Qi Huifeng Cheng Lifeng Sun Siyun Liu Yue Wang Xinlei Jia Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5751: Lane Detection Algorithm in Curves Based on Multi-Sensor Fusion
Jiang Identifying lane markings is a key technology in assisted driving and autonomous driving. The traditional sliding window lane detection algorithm has good detection performance in straight lanes and curves with small curvature, but its detection and tracking performance is poor in curves with larger curvature. Large curvature curves are common scenes in traffic roads. Therefore, in response to the problem of poor lane detection performance of traditional sliding window lane detection algorithms in large curvature curves, this article improves the traditional sliding window algorithm and proposes a sliding window ...
Source: Sensors - June 20, 2023 Category: Biotechnology Authors: Qiang Zhang Jianze Liu Xuedong Jiang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5772: Wideband TDoA Positioning Exploiting RSS-Based Clustering
Witrisal The accuracy of radio-based positioning is heavily influenced by a dense multipath (DM) channel, leading to poor position accuracy. The DM affects both time of flight (ToF) measurements extracted from wideband (WB) signals—specifically, if the bandwidth is below 100 MHz—as well as received signal strength (RSS) measurements, due to the interference of multipath signal components onto the information-bearing line-of-sight (LoS) component. This work proposes an approach for combining these two different measurement technologies, leading to a robust position estimation in the presence...
Source: Sensors - June 20, 2023 Category: Biotechnology Authors: Andreas Fuchs Lukas Wielandner Daniel Neunteufel Holger Arthaber Klaus Witrisal Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5721: Edge-Supervised Linear Object Skeletonization for High-Speed Camera
awa This paper presents a high-speed skeletonization algorithm for detecting the skeletons of linear objects from their binary images. The primary objective of our research is to achieve rapid extraction of the skeletons from binary images while maintaining accuracy for high-speed cameras. The proposed algorithm uses edge supervision and a branch detector to efficiently search inside the object, avoiding unnecessary computation on irrelevant pixels outside the object. Additionally, our algorithm addresses the challenge of self-intersections in linear objects with a branch detection module, which detects existing inters...
Source: Sensors - June 19, 2023 Category: Biotechnology Authors: Taohan Wang Yuji Yamakawa Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5706: Colorimetric Characterization of Color Imaging System Based on Kernel Partial Least Squares
Xufen Xie Colorimetric characterization is the basis of color information management in color imaging systems. In this paper, we propose a colorimetric characterization method based on kernel partial least squares (KPLS) for color imaging systems. This method takes the kernel function expansion of the three-channel response values (RGB) in the device-dependent space of the imaging system as input feature vectors, and CIE-1931 XYZ as output vectors. We first establish a KPLS color-characterization model for color imaging systems. Then we determine the hyperparameters based on nested cross validation and grid search; a...
Source: Sensors - June 19, 2023 Category: Biotechnology Authors: Siyu Zhao Lu Liu Zibing Feng Ningfang Liao Qiang Liu Xufen Xie Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5684: Some Design Considerations in Passive Indoor Positioning Systems
ersson User location is becoming an increasingly common and important feature for a wide range of services. Smartphone owners increasingly use location-based services, as service providers add context-enhanced functionality such as car-driving routes, COVID-19 tracking, crowdedness indicators, and suggestions for nearby points of interest. However, positioning a user indoors is still problematic due to the fading of the radio signal caused by multipath and shadowing, where both have complex dependencies on the indoor environment. Location fingerprinting is a common positioning method where Radio Signal Strength (RSS) m...
Source: Sensors - June 18, 2023 Category: Biotechnology Authors: Jimmy Engstr öm Åse Jevinger Carl Magnus Olsson Jan A. Persson Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5641: A Cycle Slip Detection and Repair Method Based on Inertial Aiding for BDS Triple-Frequency Signals
dong Zhao Cycle slip detection and repair is a prerequisite to obtain high-precision positioning based on a carrier phase. Traditional triple-frequency pseudorange and phase combination algorithm are highly sensitive to the pseudorange observation accuracy. To solve the problem, a cycle slip detection and repair algorithm based on inertial aiding for a BeiDou navigation satellite system (BDS) triple-frequency signal is proposed. To enhance the robustness, the INS-aided cycle slip detection model with double-differenced observations is derived. Then, the geometry-free phase combination is united to detect the insensitiv...
Source: Sensors - June 16, 2023 Category: Biotechnology Authors: Xiyu Fu Yongrong Sun Ling Wu Kaifeng Wang Kedong Zhao Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5619: SMSP Mainlobe Jamming Suppression with FDA-MIMO Radar Based on FastICA Algorithm
long Fu In the electronic warfare environment, the performance of ground-based radar target search is seriously degraded due to the existence of smeared spectrum (SMSP) jamming. SMSP jamming is generated by the self-defense jammer on the platform, playing an important role in electronic warfare, making traditional radars based on linear frequency modulation (LFM) waveforms face great challenges in searching for targets. To solve this problem, an SMSP mainlobe jamming suppression method based on a frequency diverse array (FDA) multiple-input multiple-output (MIMO) radar is proposed. The proposed method first uses the ma...
Source: Sensors - June 15, 2023 Category: Biotechnology Authors: Pengfei Wan Guisheng Liao Jingwei Xu Xiaolong Fu Tags: Communication Source Type: research

Sensors, Vol. 23, Pages 5557: Optimized Replication of ADC-Based Particle Counting Algorithm with Reconfigurable Multi-Variables in Pseudo-Supervised Digital Twining of Reference Dust Sensor Systems
In this study, we attempt to obtain similar particle count results in a single-sensing device replicated from the particle count results in a multi-sensing device without knowledge of the particle count acquisition algorithm of the multi-sensing device. Through filtering, we suppressed the noise and baseline movements of the raw data of the device. In addition, in the process of determining the multi-threshold for obtaining the particle counts, the existing complex particle count determination algorithm was simplified to make it possible to utilize the look-up table. The proposed simplified particle count calculation algor...
Source: Sensors - June 14, 2023 Category: Biotechnology Authors: Seungmin Lee Jisu Kwon Daejin Park Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5497: Exploring the Applications of Indocyanine Green in Robot-Assisted Urological Surgery: A Comprehensive Review of Fluorescence-Guided Techniques
ntino Leonardo This comprehensive review aims to explore the applications of indocyanine green (ICG) in robot-assisted urological surgery through a detailed examination of fluorescence-guided techniques. An extensive literature search was conducted in PubMed/MEDLINE, EMBASE and Scopus, using keywords such as “indocyanine green,” “ICG”, “NIRF”, “Near Infrared Fluorescence”, “robot-assisted”, and “urology”. Additional suitable articles were collected by ma...
Source: Sensors - June 11, 2023 Category: Biotechnology Authors: Leslie Claire Licari Eugenio Bologna Flavia Proietti Rocco Simone Flammia Alfredo Maria Bove Simone D ’annunzio Gabriele Tuderti Costantino Leonardo Tags: Review Source Type: research

Sensors, Vol. 23, Pages 5465: Li2100deplMoO4 Scintillating Bolometers for Rare-Event Search Experiments
We report on the development of scintillating bolometers based on lithium molybdate crystals that contain molybdenum that has depleted into the double-β active isotope 100Mo (Li2100deplMoO4). We used two Li2100deplMoO4 cubic samples, each of which consisted of 45-millimeter sides and had a mass of 0.28 kg; these samples were produced following the purification and crystallization protocols developed for double-β search experiments with 100Mo-enriched Li2MoO4 crystals. Bolometric Ge detectors were utilized to register the scintillation photons that were emitted by the Li2100deplMoO4 crystal scintil...
Source: Sensors - June 9, 2023 Category: Biotechnology Authors: Iulian C. Bandac Alexander S. Barabash Laurent Berg é Yury A. Borovlev Jos é Maria Calvo-Mozota Paolo Carniti Maurice Chapellier Ioan Dafinei Fedor A. Danevich Louis Dumoulin Federico Ferri Andrea Giuliani Claudio Gotti Philippe Gras Veronika D. Grigori Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5433: DGTTSSA: Data Gathering Technique Based on Trust and Sparrow Search Algorithm for WSNs
d Salim Wireless Sensor Networks (WSNs) have been successfully utilized for developing various collaborative and intelligent applications that can provide comfortable and smart-economic life. This is because the majority of applications that employ WSNs for data sensing and monitoring purposes are in open practical environments, where security is often the first priority. In particular, the security and efficacy of WSNs are universal and inevitable issues. One of the most effective methods for increasing the lifetime of WSNs is clustering. In cluster-based WSNs, Cluster Heads (CHs) play a critical role; however, if the...
Source: Sensors - June 8, 2023 Category: Biotechnology Authors: Walid Osamy Ahmed M. Khedr Bader Alwasel Ahmed Salim Tags: Article Source Type: research