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Total 1395 results found since Jan 2013.

Sensors, Vol. 23, Pages 786: Ultra-High Capacity Optical Satellite Communication System Using PDM-256-QAM and Optical Angular Momentum Beams
Ill Chul Doo Twisted light beams such as optical angular momentum (OAM) with numerous possible orthogonal states have drawn the prodigious contemplation of researchers. OAM multiplexing is a futuristic multi-access technique that has not been scrutinized for optical satellite communication (OSC) systems thus far, and it opens up a new window for ultra-high-capacity systems. This paper presents the 4.8 Tbps (5 wavelengths × 3 OAM beams × 320 Gbps) ultra-high capacity OSC system by incorporating polarization division multiplexed (PDM) 256-Quadrature amplitude modulation (256-QAM) and OAM be...
Source: Sensors - January 10, 2023 Category: Biotechnology Authors: Shippu Sachdeva Simarpreet Kaur Romisha Arora Manoj Sindhwani Krishan Arora Woong Cho Gyanendra Prasad Joshi Ill Chul Doo Tags: Article Source Type: research

Sensors, Vol. 23, Pages 788: Leveraging Blockchain Technology for Ensuring Security and Privacy Aspects in Internet of Things: A Systematic Literature Review
ár As the Internet of Things (IoT) concept materialized worldwide in complex ecosystems, the related data security and privacy issues became apparent. While the system elements and their communication paths could be protected individually, generic, ecosystem-wide approaches were sought after as well. On a parallel timeline to IoT, the concept of distributed ledgers and blockchains came into the technological limelight. Blockchains offer many advantageous features in relation to enhanced security, anonymity, increased capacity, and peer-to-peer capabilities. Although blockchain technology can provide IoT with effective...
Source: Sensors - January 10, 2023 Category: Biotechnology Authors: Haider Dhia Zubaydi P ál Varga S ándor Molnár Tags: Review Source Type: research

Sensors, Vol. 23, Pages 784: Driver Identification Using Statistical Features of Motor Activity and Genetic Algorithms
illalba-Condori Driver identification refers to the process whose primary purpose is identifying the person behind the steering wheel using collected information about the driver him/herself. The constant monitoring of drivers through sensors generates great benefits in advanced driver assistance systems (ADAS), to learn more about the behavior of road users. Currently, there are many research works that address the subject in search of creating intelligent models that help to identify vehicle users in an efficient and objective way. However, the different methodologies proposed to create these models are based on data...
Source: Sensors - January 10, 2023 Category: Biotechnology Authors: Carlos H. Espino-Salinas Huizilopoztli Luna-Garc ía Jos é M. Celaya-Padilla Jorge A. Morgan-Benita Cesar Vera-Vasquez Wilson J. Sarmiento Carlos E. Galv án-Tejada Jorge I. Galv án-Tejada Hamurabi Gamboa-Rosales Klinge Orlando Villalba-Condori Tags: Article Source Type: research

Sensors, Vol. 23, Pages 782: A Quantum Annealing Bat Algorithm for Node Localization in Wireless Sensor Networks
ng Lv Node localization in two-dimensional (2D) and three-dimensional (3D) space for wireless sensor networks (WSNs) remains a hot research topic. To improve the localization accuracy and applicability, we first propose a quantum annealing bat algorithm (QABA) for node localization in WSNs. QABA incorporates quantum evolution and annealing strategy into the framework of the bat algorithm to improve local and global search capabilities, achieve search balance with the aid of tournament and natural selection, and finally converge to the best optimized value. Additionally, we use trilateral localization and geometric feat...
Source: Sensors - January 10, 2023 Category: Biotechnology Authors: Shujie Yu Jianping Zhu Chunfeng Lv Tags: Article Source Type: research

Sensors, Vol. 23, Pages 774: Person Re-Identification Based on Contour Information Embedding
Wang Person re-identification (Re-ID) plays an important role in the search for missing people and the tracking of suspects. Person re-identification based on deep learning has made great progress in recent years, and the application of the pedestrian contour feature has also received attention. In the study, we found that pedestrian contour feature is not enough in the representation of CNN. On this basis, in order to improve the recognition performance of Re-ID network, we propose a contour information extraction module (CIEM) and a contour information embedding method, so that the network can focus on more contour ...
Source: Sensors - January 10, 2023 Category: Biotechnology Authors: Hao Chen Yan Zhao Shigang Wang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 815: Using Whale Optimization Algorithm and Haze Level Information in a Model-Based Image Dehazing Algorithm
This study focuses on a model-based algorithm. A popular model-based method is dark channel prior (DCP) which has attracted a lot of attention because of its simplicity and effectiveness. In DCP-based methods, the model parameters should be appropriately estimated for better performance. Previously, we found that appropriate scaling factors of model parameters helped dehazing performance and proposed an improved DCP (IDCP) method that uses heuristic scaling factors for the model parameters (atmospheric light and initial transmittance). With the IDCP, this paper presents an approach to find optimal scaling factors using the...
Source: Sensors - January 10, 2023 Category: Biotechnology Authors: Cheng-Hsiung Hsieh Ze-Yu Chen Yi-Hung Chang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 755: Adaptive Aquila Optimizer Combining Niche Thought with Dispersed Chaotic Swarm
Xiaoyan Li The Aquila Optimizer (AO) is a new bio-inspired meta-heuristic algorithm inspired by Aquila’s hunting behavior. Adaptive Aquila Optimizer Combining Niche Thought with Dispersed Chaotic Swarm (NCAAO) is proposed to address the problem that although the Aquila Optimizer (AO) has a strong global exploration capability, it has an insufficient local exploitation capability and a slow convergence rate. First, to improve the diversity of populations in the algorithm and the uniformity of distribution in the search space, DLCS chaotic mapping is used to generate the initial populations so that the alg...
Source: Sensors - January 9, 2023 Category: Biotechnology Authors: Yue Zhang Xiping Xu Ning Zhang Kailin Zhang Weida Dong Xiaoyan Li Tags: Article Source Type: research

Sensors, Vol. 23, Pages 704: Sine-SSA-BP Ship Trajectory Prediction Based on Chaotic Mapping Improved Sparrow Search Algorithm
Conclusions: The test results show that the Sine-SSA-BP neural network has higher prediction accuracy and better stability than conventional LSTM and SVM, especially in the prediction of corners, which is in good agreement with the real ship navigation trajectory.
Source: Sensors - January 8, 2023 Category: Biotechnology Authors: Yuanzhou Zheng Lei Li Long Qian Bosheng Cheng Wenbo Hou Yuan Zhuang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 671: Planning of Medical Flexible Needle Motion in Effective Area of Clinical Puncture
han Gao Lung cancer is the leading cause of cancer deaths worldwide. Although several lung cancer diagnostic methods are available for lung nodule biopsy, there are limitations in terms of accuracy, safety, and invasiveness. Transbronchial needle aspiration (TBNA) is a common method for diagnosing and treating lung cancer that involves a robot-assisted medical flexible needle moving along a curved three-dimensional trajectory, avoiding anatomical barriers to achieve clinically meaningful goals in humans. Inspired by the puncture angle between the needle tip and the vessel in venipuncture, we suggest that different orie...
Source: Sensors - January 6, 2023 Category: Biotechnology Authors: Shuai Feng Shigang Wang Wanxiong Jiang Xueshan Gao Tags: Article Source Type: research

Sensors, Vol. 23, Pages 667: SONG: A Multi-Objective Evolutionary Algorithm for Delay and Energy Aware Facility Location in Vehicular Fog Networks
afar Iqbal Khan With the emergence of delay- and energy-critical vehicular applications, forwarding sense-actuate data from vehicles to the cloud became practically infeasible. Therefore, a new computational model called Vehicular Fog Computing (VFC) was proposed. It offloads the computation workload from passenger devices (PDs) to transportation infrastructures such as roadside units (RSUs) and base stations (BSs), called static fog nodes. It can also exploit the underutilized computation resources of nearby vehicles that can act as vehicular fog nodes (VFNs) and provide delay- and energy-aware computing services. How...
Source: Sensors - January 6, 2023 Category: Biotechnology Authors: Md. Muzakkir Hussain Ahmad Taher Azar Rafeeq Ahmed Syed Umar Amin Basit Qureshi V. Dinesh Reddy Irfan Alam Zafar Iqbal Khan Tags: Article Source Type: research

Sensors, Vol. 23, Pages 685: A Knowledge-Grounded Task-Oriented Dialogue System with Hierarchical Structure for Enhancing Knowledge Selection
eong For a task-oriented dialogue system to provide appropriate answers to and services for users’ questions, it is necessary for it to be able to utilize knowledge related to the topic of the conversation. Therefore, the system should be able to select the most appropriate knowledge snippet from the knowledge base, where external unstructured knowledge is used to respond to user requests that cannot be solved by the internal knowledge addressed by the database or application programming interface. Therefore, this paper constructs a three-step knowledge-grounded task-oriented dialogue system with knowledg...
Source: Sensors - January 6, 2023 Category: Biotechnology Authors: Lee Jeong Tags: Article Source Type: research

Sensors, Vol. 23, Pages 629: Survey on Exact kNN Queries over High-Dimensional Data Space
enjie Zhang k nearest neighbours (kNN) queries are fundamental in many applications, ranging from data mining, recommendation system and Internet of Things, to Industry 4.0 framework applications. In mining, specifically, it can be used for the classification of human activities, iterative closest point registration and pattern recognition and has also been helpful for intrusion detection systems and fault detection. Due to the importance of kNN queries, many algorithms have been proposed in the literature, for both static and dynamic data. In this paper, we focus on exact kNN queries and present a comprehensive survey...
Source: Sensors - January 5, 2023 Category: Biotechnology Authors: Nimish Ukey Zhengyi Yang Binghao Li Guangjian Zhang Yiheng Hu Wenjie Zhang Tags: Review Source Type: research

Sensors, Vol. 23, Pages 606: A Flower Pollination Optimization Algorithm Based on Cosine Cross-Generation Differential Evolution
Yanfei Wu The flower pollination algorithm (FPA) is a novel heuristic optimization algorithm inspired by the pollination behavior of flowers in nature. However, the global and local search processes of the FPA are sensitive to the search direction and parameters. To solve this issue, an improved flower pollination algorithm based on cosine cross-generation differential evolution (FPA-CCDE) is proposed. The algorithm uses cross-generation differential evolution to guide the local search process, so that the optimal solution is achieved and sets cosine inertia weights to increase the search convergence speed. At the same...
Source: Sensors - January 5, 2023 Category: Biotechnology Authors: Yunjian Jia Shankun Wang Liang Liang Yaxing Wei Yanfei Wu Tags: Article Source Type: research

Sensors, Vol. 23, Pages 567: ESPRESS.0: Eustachian Tube-Inspired Tactile Sensor Exploiting Pneumatics for Range Extension and SenSitivity Tuning
anaki Optimising the sensitivity of a tactile sensor to a specific range of stimuli magnitude usually compromises the sensor’s widespread usage. This paper presents a novel soft tactile sensor capable of dynamically tuning its stiffness for enhanced sensitivity across a range of applied forces, taking inspiration from the Eustachian tube in the mammalian ear. The sensor exploits an adjustable pneumatic back pressure to control the effective stiffness of its 20 mm diameter elastomer interface. An internally translocated fluid is coupled to the membrane and optically tracked to measure physical interactions...
Source: Sensors - January 4, 2023 Category: Biotechnology Authors: George P. Jenkinson Andrew T. Conn Antonia Tzemanaki Tags: Article Source Type: research

Sensors, Vol. 23, Pages 592: RSS Model Improvement Considering Road Conditions for the Application of a Variable Focus Function Camera
Kim The automobile industry has developed dramatically in recent years, the supply of vehicles has also increased, and thus it has become deeply established in everyday life. Recently, as the supply of vehicles with autonomous driving functions increases, the safety of vehicles is also an emerging issue. Various car-following models for the safe driving of vehicles have long been studied by various people, and recently, a Responsibility-Sensitive Safety (RSS) model has been proposed by Mobileye. However, in existing car-following models or the RSS model, the safe distance between vehicles is presented using only vehic...
Source: Sensors - January 4, 2023 Category: Biotechnology Authors: Kim Kim Tags: Article Source Type: research