The digital twin(DT)includes real-time data analytics based on the actual product or manufacturing processing parameters.Data from digital twins can predict asset maintenance requirements ahead of time.This saves mone...The digital twin(DT)includes real-time data analytics based on the actual product or manufacturing processing parameters.Data from digital twins can predict asset maintenance requirements ahead of time.This saves money by decreasing operating expenses and asset downtime,which improves company efficiency.In this paper,a digital twin in braiding machinery based on IoT(DTBM-IoT)used to diagnose faults.When an imbalance fault occurs,the system gathers experimental data.After that,the information is sent into a digital win model of the rotor system to see whether it can quantify and locate imbalance for defect detection.It is possible to anticipate asset maintenance requirements with DT technology by IoT(Internet of Things)sensors,XR(X-Ray)capabilities,and AI-powered analytics.A DT model’s appropriate design and flexibility remain difficult because of the nonlinear dynamics and unpre-dictability inherent in the degrading process of equipment.The results indicate that the DT in braiding machinery developed allows for precise diagnostic and dynamic deterioration analysis.At least there is 37%growth in efficiency over conventional approaches.展开更多
In this paper, the distributed synchronization of stochastic coupled neural networks with time-varying delay is concerned via randomly occurring control. We use two Bernoulli stochastic variables to describe the occur...In this paper, the distributed synchronization of stochastic coupled neural networks with time-varying delay is concerned via randomly occurring control. We use two Bernoulli stochastic variables to describe the occurrence of distributed adaptive control and updating law according to certain probabilities. The distributed adaptive control and updating law for each vertex in the network depend on the state information on each vertex’s neighborhood. Based on Lyapunov stability theory, It</span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">ô</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> differential equations, etc., by constructing the appropriate Lyapunov functional, we study and obtain sufficient conditions for the distributed synchronization of such networks in mean square.展开更多
This paper deals with the modified function projective synchronization problem for general complex networks with multiple proportional delays. With the existence of multiple proportional delays, an effective hybrid fe...This paper deals with the modified function projective synchronization problem for general complex networks with multiple proportional delays. With the existence of multiple proportional delays, an effective hybrid feedback control is designed to attain modified function projective synchronization of networks. Numerical example is provided to show the effectiveness of our result.展开更多
In the present paper we investigate the relationship between Wiener number W, hyper-Wiener number R, Wiener vectors WV, hyper-Wiener vectors HWV, Wiener polynomial H, hyper-Wiener polynomial HH and distance distributi...In the present paper we investigate the relationship between Wiener number W, hyper-Wiener number R, Wiener vectors WV, hyper-Wiener vectors HWV, Wiener polynomial H, hyper-Wiener polynomial HH and distance distribution DD of a (molecular) graph. It is shown that for connected graphs G and G*, the following five statements are equivalent:?;and if G and G* have same distance distribution DD then they have same W and R but the contrary is not true. Therefore, we further investigate the graphs with same distance distribution. Some construction methods for finding graphs with same distance distribution are given.展开更多
This paper studies the problem of finite-time synchronization for a class of heterogeneous complex networks which not only have node time-varying delays and coupled time-varying delays but also contain uncertain distu...This paper studies the problem of finite-time synchronization for a class of heterogeneous complex networks which not only have node time-varying delays and coupled time-varying delays but also contain uncertain disturbance. An appropriate controller is designed such that this type of network can be synchronized within a finite time. By constructing a proper Lyapunov function and using the finite-time stability theory, the sufficient conditions for the network to achieve finite-time synchronization are given and the finite time is estimated. Finally, the conclusions obtained are extended to the case of homogeneous complex networks with time-varying delays and uncertain disturbance.展开更多
This paper studies the distributed synchronization control problem of a class of stochastic dynamical systems with time-varying delays and random noise via randomly occurring control. The activation of the distributed...This paper studies the distributed synchronization control problem of a class of stochastic dynamical systems with time-varying delays and random noise via randomly occurring control. The activation of the distributed adaptive controller and the update of the control gain designed in this paper all happen randomly. Based on the Lyapunov stability theory, LaSalle invariance principle, combined with the use of the properties of the matrix Kronecker product, stochastic differential equation theory and other related tools, by constructing the appropriate Lyapunov functional, the criterion for the distributed synchronization of this type of stochastic complex networks in mean square is obtained.展开更多
This paper presents an improved Randomized Circle Detection (RCD) algorithm with the characteristic of circularity to detect randomized circle in images with complex background, which is not based on the Hough Transfo...This paper presents an improved Randomized Circle Detection (RCD) algorithm with the characteristic of circularity to detect randomized circle in images with complex background, which is not based on the Hough Transform. The experimental results denote that this algorithm can locate the circular mark of Printed Circuit Board (PCB).展开更多
The purpose of this paper is to study a semilinear Schr<span style="white-space:nowrap;">ö</span>dinger equation with constraint in <em>H</em><sup>1</sup>(<str...The purpose of this paper is to study a semilinear Schr<span style="white-space:nowrap;">ö</span>dinger equation with constraint in <em>H</em><sup>1</sup>(<strong>R</strong><sup><em>N</em></sup>), and prove the existence of sign changing solution. Under suitable conditions, we obtain a negative solution, a positive solution and a sign changing solution by using variational methods.展开更多
In this paper, we prove when these x ∈ <em>l</em><sub>2</sub> with <img src="Edit_f19f1285-6d80-48bb-b69d-6d6112f13051.bmp" alt="" /> , they have the common <em>...In this paper, we prove when these x ∈ <em>l</em><sub>2</sub> with <img src="Edit_f19f1285-6d80-48bb-b69d-6d6112f13051.bmp" alt="" /> , they have the common <em>δ</em> for strongly ball proximinal. By using this property, we can prove the strong ball proximinality of <em>l</em><span style="white-space:nowrap;"><sub>∞</sub></span>(<em>l</em><sub>2</sub>). Also, we show that equable subspace <em>Y</em> of a Banach space <em>X</em> is actually uniform ball proximinality.展开更多
This paper studies the generalized synchronization of a class of drive-response neural networks with time-varying delay. When the topological structures of the drive-response neural networks are known, by designing an...This paper studies the generalized synchronization of a class of drive-response neural networks with time-varying delay. When the topological structures of the drive-response neural networks are known, by designing an appropriate nonlinear adaptive controller, the generalized synchronization of these two networks is obtained based on Lyapunov stability theory and LaSalle’s invariance principle.展开更多
In this paper, an impulsive control strategy is proposed for a class of nonlinear stochastic dynamical networks with time-varying delay. Using the Lyapunov stability theory, a sufficient verifiable criterion for the e...In this paper, an impulsive control strategy is proposed for a class of nonlinear stochastic dynamical networks with time-varying delay. Using the Lyapunov stability theory, a sufficient verifiable criterion for the exponential synchronization is derived analytically. Finally, a numerical simulation example is provided to verify the effectiveness of the proposed approach.展开更多
This paper is concerned with the design of expressway toll station problem based on neural network and traffic flow. Firstly, the design of the toll plaza is mainly through analyzing the daily traffic flow, different ...This paper is concerned with the design of expressway toll station problem based on neural network and traffic flow. Firstly, the design of the toll plaza is mainly through analyzing the daily traffic flow, different charging mode of construction cost and waiting time of the United States. Secondly, exploring traffic conditions is divided into two kinds, based on the traffic flow speed-density flow model. Then, a fuzzy-BP neural network model is constructed, with capacity, cost, and safety factor as the input layers and performance as the output layer. It is concluded that this scheme will reduce the occurrence of traffic accidents, so it is desirable. Considering that the increase in unmanned vehicles will lead to an increase in safety performance, we increase the number of electronic toll stations to improve security performance and reduce the occurrence of traffic accidents.展开更多
The emphasis is laid on expanding students’vocabulary in the new English Curriculum Standards.Without effective approaches to vocabulary learning,students can hardly form vocabulary networks in mind.Combining with mo...The emphasis is laid on expanding students’vocabulary in the new English Curriculum Standards.Without effective approaches to vocabulary learning,students can hardly form vocabulary networks in mind.Combining with modern educational technology,the author carries out experimental teaching to explore the effectiveness of vocabulary teaching based on prototype category theory and presents some samples of vocabulary teaching.The study shows that these teaching methods can effectively enhance students’cognition abilities,stimulate association,promote vocabulary processing,form a categorized network schema,and finally improve students’lexical competence and long-term memory.展开更多
Echolocation clicks of Indo-Pacific humpback dolphins(Sousa chinensis)and East Asian finless porpoises(Neophocaena asiaeorientalis sunmeri)were recorded and analyzed to deepen our understandings on vocalizations varia...Echolocation clicks of Indo-Pacific humpback dolphins(Sousa chinensis)and East Asian finless porpoises(Neophocaena asiaeorientalis sunmeri)were recorded and analyzed to deepen our understandings on vocalizations variability of these two endangered species.Passive acoustic monitoring was used to record the clicks during boat-based field surveys in the Xiamen waters.Subsequent analyses show clicks emitted by Indo-Pacific humpback dolphins are characterized by short duration,high frequency,and broadband bandwidth.Comparatively,clicks of East Asian finless porpoise have a relatively longer duration,higher peak frequency,and narrower bandwidth.The duration,centroid frequency and-10 dB bandwidth of clicks are significantly different between these two species.展开更多
基金supported by the Fujian Province Natural Science Foundation (Grant No.2019J01711)Fujian ProvinceMiddle-aged Teachers Project (Grant No.JAT210670)Fujian Province Educational Reform Project (Grant No.FBJG2020316).
文摘The digital twin(DT)includes real-time data analytics based on the actual product or manufacturing processing parameters.Data from digital twins can predict asset maintenance requirements ahead of time.This saves money by decreasing operating expenses and asset downtime,which improves company efficiency.In this paper,a digital twin in braiding machinery based on IoT(DTBM-IoT)used to diagnose faults.When an imbalance fault occurs,the system gathers experimental data.After that,the information is sent into a digital win model of the rotor system to see whether it can quantify and locate imbalance for defect detection.It is possible to anticipate asset maintenance requirements with DT technology by IoT(Internet of Things)sensors,XR(X-Ray)capabilities,and AI-powered analytics.A DT model’s appropriate design and flexibility remain difficult because of the nonlinear dynamics and unpre-dictability inherent in the degrading process of equipment.The results indicate that the DT in braiding machinery developed allows for precise diagnostic and dynamic deterioration analysis.At least there is 37%growth in efficiency over conventional approaches.
文摘In this paper, the distributed synchronization of stochastic coupled neural networks with time-varying delay is concerned via randomly occurring control. We use two Bernoulli stochastic variables to describe the occurrence of distributed adaptive control and updating law according to certain probabilities. The distributed adaptive control and updating law for each vertex in the network depend on the state information on each vertex’s neighborhood. Based on Lyapunov stability theory, It</span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">ô</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> differential equations, etc., by constructing the appropriate Lyapunov functional, we study and obtain sufficient conditions for the distributed synchronization of such networks in mean square.
文摘This paper deals with the modified function projective synchronization problem for general complex networks with multiple proportional delays. With the existence of multiple proportional delays, an effective hybrid feedback control is designed to attain modified function projective synchronization of networks. Numerical example is provided to show the effectiveness of our result.
文摘In the present paper we investigate the relationship between Wiener number W, hyper-Wiener number R, Wiener vectors WV, hyper-Wiener vectors HWV, Wiener polynomial H, hyper-Wiener polynomial HH and distance distribution DD of a (molecular) graph. It is shown that for connected graphs G and G*, the following five statements are equivalent:?;and if G and G* have same distance distribution DD then they have same W and R but the contrary is not true. Therefore, we further investigate the graphs with same distance distribution. Some construction methods for finding graphs with same distance distribution are given.
文摘This paper studies the problem of finite-time synchronization for a class of heterogeneous complex networks which not only have node time-varying delays and coupled time-varying delays but also contain uncertain disturbance. An appropriate controller is designed such that this type of network can be synchronized within a finite time. By constructing a proper Lyapunov function and using the finite-time stability theory, the sufficient conditions for the network to achieve finite-time synchronization are given and the finite time is estimated. Finally, the conclusions obtained are extended to the case of homogeneous complex networks with time-varying delays and uncertain disturbance.
文摘This paper studies the distributed synchronization control problem of a class of stochastic dynamical systems with time-varying delays and random noise via randomly occurring control. The activation of the distributed adaptive controller and the update of the control gain designed in this paper all happen randomly. Based on the Lyapunov stability theory, LaSalle invariance principle, combined with the use of the properties of the matrix Kronecker product, stochastic differential equation theory and other related tools, by constructing the appropriate Lyapunov functional, the criterion for the distributed synchronization of this type of stochastic complex networks in mean square is obtained.
基金supported by Science and Technology Project of Fujian Provincial Department of Education under contract JAT170917Youth Science and Research Foundation of Chengyi College Jimei University under contract C16005.
文摘This paper presents an improved Randomized Circle Detection (RCD) algorithm with the characteristic of circularity to detect randomized circle in images with complex background, which is not based on the Hough Transform. The experimental results denote that this algorithm can locate the circular mark of Printed Circuit Board (PCB).
文摘The purpose of this paper is to study a semilinear Schr<span style="white-space:nowrap;">ö</span>dinger equation with constraint in <em>H</em><sup>1</sup>(<strong>R</strong><sup><em>N</em></sup>), and prove the existence of sign changing solution. Under suitable conditions, we obtain a negative solution, a positive solution and a sign changing solution by using variational methods.
文摘In this paper, we prove when these x ∈ <em>l</em><sub>2</sub> with <img src="Edit_f19f1285-6d80-48bb-b69d-6d6112f13051.bmp" alt="" /> , they have the common <em>δ</em> for strongly ball proximinal. By using this property, we can prove the strong ball proximinality of <em>l</em><span style="white-space:nowrap;"><sub>∞</sub></span>(<em>l</em><sub>2</sub>). Also, we show that equable subspace <em>Y</em> of a Banach space <em>X</em> is actually uniform ball proximinality.
文摘This paper studies the generalized synchronization of a class of drive-response neural networks with time-varying delay. When the topological structures of the drive-response neural networks are known, by designing an appropriate nonlinear adaptive controller, the generalized synchronization of these two networks is obtained based on Lyapunov stability theory and LaSalle’s invariance principle.
文摘In this paper, an impulsive control strategy is proposed for a class of nonlinear stochastic dynamical networks with time-varying delay. Using the Lyapunov stability theory, a sufficient verifiable criterion for the exponential synchronization is derived analytically. Finally, a numerical simulation example is provided to verify the effectiveness of the proposed approach.
文摘This paper is concerned with the design of expressway toll station problem based on neural network and traffic flow. Firstly, the design of the toll plaza is mainly through analyzing the daily traffic flow, different charging mode of construction cost and waiting time of the United States. Secondly, exploring traffic conditions is divided into two kinds, based on the traffic flow speed-density flow model. Then, a fuzzy-BP neural network model is constructed, with capacity, cost, and safety factor as the input layers and performance as the output layer. It is concluded that this scheme will reduce the occurrence of traffic accidents, so it is desirable. Considering that the increase in unmanned vehicles will lead to an increase in safety performance, we increase the number of electronic toll stations to improve security performance and reduce the occurrence of traffic accidents.
文摘The emphasis is laid on expanding students’vocabulary in the new English Curriculum Standards.Without effective approaches to vocabulary learning,students can hardly form vocabulary networks in mind.Combining with modern educational technology,the author carries out experimental teaching to explore the effectiveness of vocabulary teaching based on prototype category theory and presents some samples of vocabulary teaching.The study shows that these teaching methods can effectively enhance students’cognition abilities,stimulate association,promote vocabulary processing,form a categorized network schema,and finally improve students’lexical competence and long-term memory.
基金supported by the National Natural Science Foundation of China(12074323,42076159)the Special Fund for Marine and Fishery Development of Xiamen(20CZB015HJ01)+3 种基金Water Conservancy Science and Technology Innovation Project of Guangdong(2020-16)Young and Middle-aged Teacher Education Research Project of Fujian Provincial Department of Education(JT180873)Youth Research Fund Project of Chengyi University College,Jimei University(CK17009)Provincial Natural Science Foundation(2021J06031)。
文摘Echolocation clicks of Indo-Pacific humpback dolphins(Sousa chinensis)and East Asian finless porpoises(Neophocaena asiaeorientalis sunmeri)were recorded and analyzed to deepen our understandings on vocalizations variability of these two endangered species.Passive acoustic monitoring was used to record the clicks during boat-based field surveys in the Xiamen waters.Subsequent analyses show clicks emitted by Indo-Pacific humpback dolphins are characterized by short duration,high frequency,and broadband bandwidth.Comparatively,clicks of East Asian finless porpoise have a relatively longer duration,higher peak frequency,and narrower bandwidth.The duration,centroid frequency and-10 dB bandwidth of clicks are significantly different between these two species.
