High-sensitivity sensors represent a critical frontier in modern sensing technology,driving innovations across fields such as biomedical monitoring,precision instrumentation,environmental detection,and indus-trial aut...High-sensitivity sensors represent a critical frontier in modern sensing technology,driving innovations across fields such as biomedical monitoring,precision instrumentation,environmental detection,and indus-trial automation.As demands for accuracy,miniaturization,and reliability continue to grow,developing novel sensor architectures and functional materials has become essential to achieving enhanced performance under extreme or complex conditions.展开更多
This paper presents an original probabilistic model of a hybrid underwater wireless sensor network(UWSN),which includes a network of stationary sensors placed on the seabed and a mobile gateway.The mobile gateway is a...This paper presents an original probabilistic model of a hybrid underwater wireless sensor network(UWSN),which includes a network of stationary sensors placed on the seabed and a mobile gateway.The mobile gateway is a wave glider that collects data from the underwater network segment and retransmits it to the processing center.The authors consider the joint problem of optimal localization of stationary network nodes and the corresponding model for bypassing reference nodes by a wave glider.The optimality of the network is evaluated according to the criteria of energy efficiency and reliability.The influence of various physical and technical parameters of the network on its energy efficiency and on the lifespan of sensor nodes is analyzed.The analysis is carried out for networks of various scales,depending on the localization of stationary nodes and the model of bypassing the network with a wave glider.As a model example,the simulation of the functional characteristics of the network for a given size of the water area is carried out.It is shown that in the case of a medium-sized water area,the model of“bypassing the perimeter”by a wave glider is practically feasible,energy efficient and reliable for hourly data measurements.In the case of a large water area,the cluster bypass model becomes more efficient.展开更多
This paper introduces the architecture of wireless sensor networks, presents a cross-layer network management and control mechanism. The key technologies, such as Medium Access Control (MAC) and wireless routing proto...This paper introduces the architecture of wireless sensor networks, presents a cross-layer network management and control mechanism. The key technologies, such as Medium Access Control (MAC) and wireless routing protocols are discussed and compared. A proposal of applying the simple IEEE 802 MAC protocol into the wireless sensor network is introduced. In addition, in order to improve the system capacity, a multi-channel strategy for the sensor nodes is presented for decreasing the blocking probability and suppressing the accessing time delay. It is concluded that there are still a number of problems to be solved, including decreasing power consumption, improving capacity and avoiding access collision, to promote the successful commercial application of wireless sensor network.展开更多
Stochastic resonance(SR)typically manifests in nonlinear systems,wherein the detection of a weak signal is bolstered by the addition of noise.Since its first discovery in a study of ice ages on Earth,various types of ...Stochastic resonance(SR)typically manifests in nonlinear systems,wherein the detection of a weak signal is bolstered by the addition of noise.Since its first discovery in a study of ice ages on Earth,various types of SRs have been observed in biological and physical systems and have been implemented in sensors to benefit from noise.However,a universally designed sensor architecture capable of accommodating different types of SRs has not been proposed,and the widespread applications of SRs in daily environments have not yet been demonstrated.Here,we propose a sensor architecture to simultaneously realize multitype SRs and demonstrate their wide applications in mechanical,optical,and acoustic sensing domains.In particular,we find the coexistence of excitable SR and bistable SR in a sensor architecture composed of wirelessly coupled inductor-capacitor resonators connected to a nonlinearly saturable amplifier.In both types of SRs,adding noise to the system leads to a characteristic noise-enhanced signal-to-noise ratio(SNR).We further validate our findings through mechanical,optical,and acoustic sensing experiments and obtain noise-enhanced SNR by 9 dB,3 dB,and 7 dB,respectively,compared to the standard methods devoid of SR integration.Our findings provide a general strategy to design various types of SRs and pave the way for the development of a distinctive class of sensors leveraging environmental noise,with potential applications ranging from biomedical devices to ambient sensing.展开更多
文摘High-sensitivity sensors represent a critical frontier in modern sensing technology,driving innovations across fields such as biomedical monitoring,precision instrumentation,environmental detection,and indus-trial automation.As demands for accuracy,miniaturization,and reliability continue to grow,developing novel sensor architectures and functional materials has become essential to achieving enhanced performance under extreme or complex conditions.
基金The research was partially funded by the Ministry of Science and Higher Education of the Russian Federation as part of World-class Research Center program:Advanced Digital Technologies(Contract No.075-15-2020-903 dated 16.11.2020).
文摘This paper presents an original probabilistic model of a hybrid underwater wireless sensor network(UWSN),which includes a network of stationary sensors placed on the seabed and a mobile gateway.The mobile gateway is a wave glider that collects data from the underwater network segment and retransmits it to the processing center.The authors consider the joint problem of optimal localization of stationary network nodes and the corresponding model for bypassing reference nodes by a wave glider.The optimality of the network is evaluated according to the criteria of energy efficiency and reliability.The influence of various physical and technical parameters of the network on its energy efficiency and on the lifespan of sensor nodes is analyzed.The analysis is carried out for networks of various scales,depending on the localization of stationary nodes and the model of bypassing the network with a wave glider.As a model example,the simulation of the functional characteristics of the network for a given size of the water area is carried out.It is shown that in the case of a medium-sized water area,the model of“bypassing the perimeter”by a wave glider is practically feasible,energy efficient and reliable for hourly data measurements.In the case of a large water area,the cluster bypass model becomes more efficient.
文摘This paper introduces the architecture of wireless sensor networks, presents a cross-layer network management and control mechanism. The key technologies, such as Medium Access Control (MAC) and wireless routing protocols are discussed and compared. A proposal of applying the simple IEEE 802 MAC protocol into the wireless sensor network is introduced. In addition, in order to improve the system capacity, a multi-channel strategy for the sensor nodes is presented for decreasing the blocking probability and suppressing the accessing time delay. It is concluded that there are still a number of problems to be solved, including decreasing power consumption, improving capacity and avoiding access collision, to promote the successful commercial application of wireless sensor network.
基金the Key Research and Development Program of Hunan Province 2023-GK2009the National Natural Science Foundation of China 62001161+2 种基金the National Natural Science Foundation of China(NSFC)(62071215 and U2341264)the Xiaomi Foundationthe Fundamental Research Funds for the Central Universities.
文摘Stochastic resonance(SR)typically manifests in nonlinear systems,wherein the detection of a weak signal is bolstered by the addition of noise.Since its first discovery in a study of ice ages on Earth,various types of SRs have been observed in biological and physical systems and have been implemented in sensors to benefit from noise.However,a universally designed sensor architecture capable of accommodating different types of SRs has not been proposed,and the widespread applications of SRs in daily environments have not yet been demonstrated.Here,we propose a sensor architecture to simultaneously realize multitype SRs and demonstrate their wide applications in mechanical,optical,and acoustic sensing domains.In particular,we find the coexistence of excitable SR and bistable SR in a sensor architecture composed of wirelessly coupled inductor-capacitor resonators connected to a nonlinearly saturable amplifier.In both types of SRs,adding noise to the system leads to a characteristic noise-enhanced signal-to-noise ratio(SNR).We further validate our findings through mechanical,optical,and acoustic sensing experiments and obtain noise-enhanced SNR by 9 dB,3 dB,and 7 dB,respectively,compared to the standard methods devoid of SR integration.Our findings provide a general strategy to design various types of SRs and pave the way for the development of a distinctive class of sensors leveraging environmental noise,with potential applications ranging from biomedical devices to ambient sensing.
