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In this paper, the stability problem of bilateral tele-operation systems with data sampling and communication time delays is considered. Two buffers are introduced in the bilateral teleoperation control framework to deal with the issue that the information transmitted between the master and slave sides suffer from time-varying delays. The mathematical model of bilateral teleoperation systems based...
The global synchronization problem of complex dynamical networks with memristive neural networks (MNNs) nodes is studied in this paper. By using the Filippov solution and some set-valued maps, the synchronization framework of complex networks with MNNs nodes is presented. Some sufficient criteria ensuring the considered complex networks to be globally exponentially synchronized are derived by using...
This paper is aimed at the uncertain dynamics and kinematics of the master-slave manipulators for nonlinear bilateral teleoperation system in the presence of constant time delays and external disturbances in the task space. On the basis of neural networks adaptive control methods, we propose an integral-type neural networks adaptive sliding-mode controller to solve the problem of dynamic uncertainties...
In this paper, the problem of nonlinear multi-agent flocking systems with a virtual leader is studied. To save the limited communication bandwidth, a distributed event-triggered mechanism is introduced in the multi-agent flocking framework. The event-triggered flocking model is proposed, in which both the velocity and position information of the multi-agent system are used in the event triggered mechanism...
The H∞ filtering design problem is studied for a class of networked discrete-time nonlinear singular system. Both mixed random delays and packet dropouts in the communication channels are considered. The mixed time-delays consists of the discrete and distributed delays. And the packet dropout phenomenon occurs in a random way. Three mutually independent Bernoulli distributed random variables are utilized...
This paper focuses on the ℓ1 finite-time control design problem of a class of network-based positive systems. Both the event-triggered mechanism of signal transmission and the network-induced delay are taken into account. Considering the peculiarity of positive systems, the event-triggered condition is designed in a linear form to reduce the occupation of network channels, which will save the limited...
Memcached is an in-memory key-value caching system, which is used to resolve the principal contradiction of the disk-based database between the CPU and input/output, has been widely used as an effective way to solve the distance and improve the capacity of the source server. We optimize the performance of Memcached memory access through two ways: improve the density of memory storage and ameliorate...
Video super-resolution (SR) is an inverse problem, and with this method, we can reconstruct a high-resolution (HR) version of a low-resolution (LR) video sequence. Because regularization-based method can solve the pathological problem in super-resolution, so it is widely used. However, in many traditional regularization terms, only the intra-image correlation will be taken into consideration so that...
This paper is concerned with the L1-gain filtering problem of positive linear continuous-time systems in which the signals are transmitted through event-triggered network communication channels. A network-based filter system model is proposed to estimate the variables of a positive system. The event-triggered communication scheme in a linear form is presented to cut down the amount of the data in...
This paper is concerned with the problem of event-triggered control for a networked discrete-time singular system. A novel event-triggered networked control scheme is proposed to save the limited network communication bandwidth. By using a delay system approach, a unified model of event-triggered control system is established. A new criterion is proposed in terms of strict linear matrix inequality...
This letter is on the design problem of global asymptotical adaptive synchronization for a class of complex dynamical networks. In the considered networks, the dynamics of each node are approximated by a class of neural networks (NNs). The parameters of the NNs in the complex dynamical networks are unmatched with the ones in the desired dynamical system. Furthermore, the coefficient matrix of the...
This paper focuses on the event-triggered network-based synchronization problem for a class of complex networks with delayed couplings. The dynamic of each node in the considered networks is described by a neutral neural network. The remote master and the complex networks transmit signals mutually through the common communication channels, which include network-induced delays and stochastic fluctuations...
In this paper, a new algorithm based on trie structure is applied to URL routing systems like web MVC system and enterprise service bus, where the routing rules not stored as a table containing regular expressions but a trie. As a result, the table traversing in routing process is replaced by a depth-first searching for trie. Because the static pattern segments are stored as a hash table, the time...
This paper revisits the problem of asymptotic stability analysis for linear neutral systems with commensurate constant delays. The purpose is to obtain delay-dependent stability conditions that are less conservative than the existing ones in the literature. First, a novel Lyapunov-Krasovskii functional that contains integrals related to the difference operator Dxt is employed. Combining this Lyapunov-Krasovskii...
In this letter, the synchronization problem of a class of fuzzy neural networks with time delays is considered. Different from the previous literatures, in the considered master-slave frame, the master system is in form of a general delayed neural networks, and the slave system is described by a T-S fuzzy model which has different parameters with the master system. The considered parameters of the...
Residual voltage of SPD connecting to overhead line is closely related to earth potential rise at the grounding terminal of SPD. Characteristics of the SPD residual voltage caused by natural lightning and artificially triggered lightning were analyzed in this paper, and the results show that: 1) In case of the natural lightning, the earth potential can be regard as zero, and the voltage difference...
Study of this article was conducted on horizontal axis tidal turbines in a demonstration project of a 500kW ocean energy independent power supply system. Considering the depth of the sea site where the turbines would be deployed, seabed seated supporting structure was adopted in construction of two turbine units. As a typical tidal current energy resource zone in North part of China, the flow velocity...
Based on the channel-base current acquired from GCOELD, the characteristics and correlation of return stroke (RS), M component and continuing current (CC) were analyzed. The results indicate that triggered lightning is partly similar to the following process after the first return stroke of natural lightning and upward lightning in the characteristics of RS, M component and CC, and there is a certain...
Using electric field waveforms of lightning discharges observed in Beijing and Guangzhou, the detectable preliminary breakdown (PB) pulses and the following discharges are analyzed. The results show that, (1) the percentages of detectable PB pulse are 34.5% and 36.9% in Beijing and Guangzhou, respectively. The values are similar, which indicate that the characteristic of storm also play a key role...
The basic characteristics of lightning activity in the area was analyzed, according to 2012 full-year lightning data collected by a lightning detection network which located in the Potala Palace. The results show that, 12.17% of total lightning are positive lightning in the area; the average current intensity of positive lightning was 1.45 times of the negative lightning. Negative lightning with single...
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