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Sensors, Vol. 23, Pages 2941: Blending Approach Preparation of PVA-g-PMA Films with Embedded & ldquo;Green & rdquo; Synthesized Silver Nanoparticles for Acetone Optical Detection
Sensors, Vol. 23, Pages 2941: Blending Approach Preparation of PVA-g-PMA Films with Embedded “Green” Synthesized Silver Nanoparticles for Acetone Optical Detection Sensors doi: 10.3390/s23062941 Authors: Katerina Lazarova Darinka Christova Daniela Karashanova Biliana Georgieva Gergana Marovska Anton Slavov Tsvetanka Babeva The blending approach (also known as the ex-situ approach) was used for the deposition of thin composite films comprising poly(vinyl alcohol-graft-methyl acrylate) (PVA-g-PMA) and silver nanoparticles (AgNPs). Firstly, the copolymer aqueous dispersion was synthesiz...
Source: Sensors - March 8, 2023 Category: Biotechnology Authors: Katerina Lazarova Darinka Christova Daniela Karashanova Biliana Georgieva Gergana Marovska Anton Slavov Tsvetanka Babeva Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2939: Engineering of Advanced Materials for High Magnetic Field Sensing: A Review
— Advanced scientific and industrial equipment requires magnetic field sensors with decreased dimensions while keeping high sensitivity in a wide range of magnetic fields and temperatures. However, there is a lack of commercial sensors for measurements of high magnetic fields, from ∼1 T up to megagauss. Therefore, the search for advanced materials and the engineering of nanostructures exhibiting extraordinary properties or new phenomena for high magnetic field sensing applications is of great importance. The main focus of this review is the investigation of thin films, nanostructures and two-dimensional (2D...
Source: Sensors - March 8, 2023 Category: Biotechnology Authors: Nerija Žurauskienė Tags: Review Source Type: research

Sensors, Vol. 23, Pages 2901: Joint Masked Face Recognition and Temperature Measurement System Using Convolutional Neural Networks
ng Wang With the outbreak of COVID-19, epidemic prevention has become a way to prevent the spread of epidemics. Many public places, such as hospitals, schools, and office places, require disinfection and temperature measurement. To implement epidemic prevention systems and reduce the risk of infection, it is a recent trend to measure body temperature through non-contact sensing systems with thermal imaging cameras. Compared to fingerprints and irises, face recognition is accurate and does not require close contact, which significantly reduces the risk of infection. However, masks block most facial features, resulting i...
Source: Sensors - March 7, 2023 Category: Biotechnology Authors: Tsung-Han Tsai Ji-Xiu Lu Xuan-Yu Chou Chieng-Yang Wang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2895: Axis Orbit Recognition of the Hydropower Unit Based on Feature Combination and Feature Selection
an Chen Axis-orbit recognition is an essential means for the fault diagnosis of hydropower units. An axis-orbit recognition method based on feature combination and feature selection is proposed, aiming to solve the problems of the low recognition accuracy, poor robustness, and low efficiency of existing axis-orbit recognition methods. First, various contour, moment, and geometric features of axis orbit samples are extracted from the original data and combined into a multidimensional feature set; then, Random Forest (RF)-Fisher feature selection is applied to realize feature dimensionality reduction; and finally, the se...
Source: Sensors - March 7, 2023 Category: Biotechnology Authors: Wushuang Liu Yang Zheng Xuan Zhou Qijuan Chen Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2870: Highly Sensitive and Selective Dopamine Determination in Real Samples Using Au Nanoparticles Decorated Marimo-like Graphene Microbead-Based Electrochemical Sensors
This study demonstrated a promising method to fabricate DA sensor-based on MCMB derivatives as electrochemical modifiers.
Source: Sensors - March 6, 2023 Category: Biotechnology Authors: Tian She Zhu Dai Shi Chu Cai Tsai Li Jiang Fu Xia Lin Ye Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2783: An Efficient Grid-Based Geocasting Scheme for Wireless Sensor Networks
Hsun Wong In a wireless sensor network (WSN), geocasting is a location-based routing protocol used for data collection or information delivery. In geocasting, a target region usually contains many sensor nodes with limited battery capacity, and sensor nodes in multiple target regions need to transmit data to the sink. Therefore, how to use location information to construct an energy efficient geocasting path is a very important issue. FERMA is a geocasting scheme for WSNs based on Fermat points. In this paper, an efficient grid-based geocasting scheme for WSNs, which is called GB-FERMA, is proposed. The scheme uses the...
Source: Sensors - March 3, 2023 Category: Biotechnology Authors: Neng-Chung Wang Ming-Fong Tsai Chao-Yang Lee Young-Long Chen Shih-Hsun Wong Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2808: A Heuristic-Based Adaptive Iterated Greedy Algorithm for Lot-Streaming Hybrid Flow Shop Scheduling Problem with Consistent and Intermingled Sub-Lots
gying Zhu Owing to the different quantities and processing times of sub-lots, intermingling sub-lots with each other, instead of fixing the production sequence of sub-lots of a lot as in the existing studies, is a more practical approach to lot-streaming flow shops. Hence, a lot-streaming hybrid flow shop scheduling problem with consistent and intermingled sub-lots (LHFSP-CIS) was studied. A mixed integer linear programming (MILP) model was established, and a heuristic-based adaptive iterated greedy algorithm (HAIG) with three modifications was designed to solve the problem. Specifically, a two-layer encoding method wa...
Source: Sensors - March 3, 2023 Category: Biotechnology Authors: Yiling Lu Qiuhua Tang Quanke Pan Lianpeng Zhao Yingying Zhu Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2749: Colorimetric Sensors for Chemical and Biological Sensing Applications
n-Huan Yu Colorimetric sensors have been widely used to detect numerous analytes due to their cost-effectiveness, high sensitivity and specificity, and clear visibility, even with the naked eye. In recent years, the emergence of advanced nanomaterials has greatly improved the development of colorimetric sensors. This review focuses on the recent (from the years 2015 to 2022) advances in the design, fabrication, and applications of colorimetric sensors. First, the classification and sensing mechanisms of colorimetric sensors are briefly described, and the design of colorimetric sensors based on several typical nanomater...
Source: Sensors - March 2, 2023 Category: Biotechnology Authors: Yu Wu Jing Feng Guang Hu En Zhang Huan-Huan Yu Tags: Review Source Type: research

Sensors, Vol. 23, Pages 2731: Joint Texture Search and Histogram Redistribution for Hyperspectral Image Quality Improvement
eng Zhang Due to optical noise, electrical noise, and compression error, data hyperspectral remote sensing equipment is inevitably contaminated by various noises, which seriously affect the applications of hyperspectral data. Therefore, it is of great significance to enhance hyperspectral imaging data quality. To guarantee the spectral accuracy during data processing, band-wise algorithms are not suitable for hyperspectral data. This paper proposes a quality enhancement algorithm based on texture search and histogram redistribution combined with denoising and contrast enhancement. Firstly, a texture-based search algori...
Source: Sensors - March 2, 2023 Category: Biotechnology Authors: Bingliang Hu Junyu Chen Yihao Wang Haiwei Li Geng Zhang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2694: NN-LCS: Neural Network and Linear Coordinate Solver Fusion Method for UWB Localization in Car Keyless Entry System
owei Zhou Nowadays, ultra-wideband (UWB) technology is becoming a new approach to localize keyfobs in the car keyless entry system (KES), because it provides precise localization and secure communication. However, for vehicles the distance ranging suffers from great errors because of none-line-of-sight (NLOS) which is raised by the car. Regarding the NLOS problem, efforts have been made to mitigate the point-to-point ranging error or to estimate the tag coordinate by neural networks. However, it still suffers from some problems such as low accuracy, overfitting, or a large number of parameters. In order to address thes...
Source: Sensors - March 1, 2023 Category: Biotechnology Authors: Zengwei Zheng Shuang Yan Lin Sun Hengxin Shu Xiaowei Zhou Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2632: Separation of Temperature-Induced Response for Bridge Long-Term Monitoring Data Using Local Outlier Correction and Savitzky & ndash;Golay Convolution Smoothing
This study proposed a separation method to identify the temperature-induced response from the long-term monitoring data with noise and other action-induced effects. In the proposed method, the original measured data are transformed using the local outlier factor (LOF), and the threshold of the LOF is determined by minimizing the variance of the modified data. The Savitzky–Golay convolution smoothing is also utilized to filter the noise of the modified data. Furthermore, this study proposes an optimization algorithm, namely the AOHHO, which hybridizes the Aquila Optimizer (AO) and the Harris Hawks Optimization...
Source: Sensors - February 27, 2023 Category: Biotechnology Authors: Wei Zhang Hongyin Yang Hongyou Cao Xiucheng Zhang Aixin Zhang Nanhao Wu Zhangjun Liu Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2630: Fast and Robust Infrared Small Target Detection Using Weighted Local Difference Variance Measure
iuhong Li Infrared (IR) small-target-detection performance restricts the development of infrared search and track (IRST) systems. Existing detection methods easily lead to missed detection and false alarms under complex backgrounds and interference, and only focus on the target position while ignoring the target shape features, which cannot further identify the category of IR targets. To address these issues and guarantee a certain runtime, a weighted local difference variance measure (WLDVM) algorithm is proposed. First, Gaussian filtering is used to preprocess the image by using the idea of a matched filter to purpos...
Source: Sensors - February 27, 2023 Category: Biotechnology Authors: Ying Zheng Yuye Zhang Ruichen Ding Chunming Ma Xiuhong Li Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2596: A Sol-Gel/Solvothermal Synthetic Approach to Titania Nanoparticles for Raman Thermometry
In this study, the Raman technique was exploited for the determination of the local temperature as a non-contact technique and titania nanoparticles (NPs) were tested as nanothermometer Raman active material. Biocompatible titania NPs were synthesized following a combination of sol-gel and solvothermal green synthesis approaches, with the aim of obtaining pure anatase samples. In particular, the optimization of three different synthesis protocols allowed materials to be obtained with well-defined crystallite dimensions and good control over the final morphology and dispersibility. TiO2 powders were characterized by X-ray d...
Source: Sensors - February 26, 2023 Category: Biotechnology Authors: Thomas Pretto Marina Franca Veronica Zani Silvia Gross Danilo Pedron Roberto Pilot Raffaella Signorini Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2559: HAAN: Learning a Hierarchical Adaptive Alignment Network for Image-Text Retrieval
nhao Xu Image-text retrieval aims to search related results of one modality by querying another modality. As a fundamental and key problem in cross-modal retrieval, image-text retrieval is still a challenging problem owing to the complementary and imbalanced relationship between different modalities (i.e., Image and Text) and different granularities (i.e., Global-level and Local-level). However, existing works have not fully considered how to effectively mine and fuse the complementarities between images and texts at different granularities. Therefore, in this paper, we propose a hierarchical adaptive alignment network...
Source: Sensors - February 25, 2023 Category: Biotechnology Authors: Shuhuai Wang Zheng Liu Xinlei Pei Junhao Xu Tags: Article Source Type: research

Sensors, Vol. 23, Pages 2560: Exact and Heuristic Multi-Robot Dubins Coverage Path Planning for Known Environments
Hengzhu Liu Coverage path planning (CPP) of multiple Dubins robots has been extensively applied in aerial monitoring, marine exploration, and search and rescue. Existing multi-robot coverage path planning (MCPP) research use exact or heuristic algorithms to address coverage applications. However, several exact algorithms always provide precise area division rather than coverage paths, and heuristic methods face the challenge of balancing accuracy and complexity. This paper focuses on the Dubins MCPP problem of known environments. Firstly, we present an exact Dubins multi-robot coverage path planning yellow(EDM) algor...
Source: Sensors - February 25, 2023 Category: Biotechnology Authors: Lin Li Dianxi Shi Songchang Jin Shaowu Yang Chenlei Zhou Yaoning Lian Hengzhu Liu Tags: Article Source Type: research