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In this paper, the completion of missing measurements in a squared distances matrix through Nystrom completion algorithm has been investigated. This missing occurred due to limitation of power when the sensors are deployed in a large area. The Nystrom algorithm has overcome the classical multidimensional scaling in a low and moderate signal to noise ratio, in addition it performs well as the number...
There is no doubt that the issue of estimate locations for unknown sources has been mattering a lot of debate in recent years, in the field of communication, Radar, Navigation, wireless sensor networks, …etc. In this paper, the multidimensional scaling (MDS) based on subspace method was applied to solve the addressed issue in the presence of distance information that acquired from TOA measurements...
This paper concerns with the optimal consensus problem of multi-agent networks under imperfect communication. With the network issues, we resort to an integrated scheme of the standard gossip algorithm and the subgradient method for multiagent cooperative control. Under the proposed control strategy, agents are supposed to transfer desirable information through a quantized mechanism, and the dithering...
In this paper, the event-driven control strategies have been proposed to study the consensus of fractional-order multi-agent systems. A general consensus control algorithm is introduced to analyze the fractional-order agent dynamics. Base on limited resources of embedded microprocessors and wireless sensors, event-triggered control mechanism have been exploited in a centralized approach, where all...
A novel multi-tracking problem is introduced in multi-agent networks. The states of multiple agents in each subnetwork asymptotically converge to the same desired trajectory in the presence of information exchanges among subnetworks. A protocol with aperiodic sampled-data is proposed to achieve the multi-tracking of second order discrete-time multi-agent networks. The stability of dynamic systems...
This paper considers the second-order consensus problem of discrete-time multi-agent systems over fixed and undirected network topologies. A distributed consensus protocol utilizing the current and one-step delayed position information is proposed. It is interesting to found that second-order consensus in such a discrete-time multi-agent system cannot be ensured without any one-step delayed position...
This study investigates the optimal tracking performance of multiple-input multiple-output linear time-invariant systems over a noisy channel in the feedback path. The communication channel is also subject to data dropouts, which was modelled as a binary stochastic process. The problem under consideration amounts to determining the minimal error in tracking a Brownian motion random process, which...
In this paper, a leader-following consensus problem of heterogenous multi-agent system with different input delays is investigated. The heterogeneous multi-agent system is composed of first-order and second-order integrator agents. By applying the graph theory and the frequency domain analysis method, a sufficient condition is established to guarantee that each agent can track the leader when the...
Glehnia littoralis is an important medicinal plants resources for treating hyperactivity and cough. we discussed the spatial structure of populations about this rare and endangered species protection and management which had an important significance. Glehnia littoralis is located in taohua isle, zhoushan in Zhejiang. Fractal characteristics of Glehnia littoralis population pattern was studied by...
Because of uncertainties, that is to say, fuzziness in the infrared vehicle target image processing, fuzzy theory is used in the infrared image processing. A new kind of image measure function is presented by fuzzy theory. We use it as the fitness function of genetic algorithm to adaptively optimize parametera and β in in-complete Beta function. Thus an optimal gray transformation curve is obtained...
In this paper, we dealt with the problems of network induced delay and randomly varying time-delay (RVTD) controlled plant in networked control systems (NCS). These inherent challenges make the conventional control methods, e.g, a mathematical model of Smith predictor combined with fuzzy adaptive controller, more difficult to meet the quality requirements for NCS stability. Specifically, based on...
Based on the analysis of Norton Model and its parameter estimation, this paper takes advantage of statistical data for the empirical analysis about diffusion trend of update and substitution for CATV in China. The findings show that compared with Bass Model, Norton Model which describes two generation products-analog TV and digital TV well with substitution curve has higher fitting degree and prediction...
This paper discusses stream media application server from stripe size, RAID algorithm and block size. According to the characteristics, we design and set up stream media application server which has excellent performance.
Based on the CST software, numerical simulations are carried out for the frequency response in a coaxial Bragg structure with tapered ripples. Results show that the bandwidth of the frequency response can be either narrowed or expanded, which depends on the tapering angle, and that the residual side-lobes of the frequency response can be effectively suppressed by employing the windowing-function technique...
To overcome premature searching by standard particle swarm optimization (PSO) algorithm for the large lost in population diversity, the measure of population diversity and its calculation are given, and an adaptive PSO with dynamically changing inertia weight is proposed. Simulation results show that the adaptive PSO not only effectively alleviates the problem of premature convergence, but also has...
Continually extended scientific research needs more cooperation among different disciplines. An outstanding research team needs to develop a set of management models to support effective management. Knowledge management, as a completely new management model and management theory, has been successfully applied to knowledge organizations in enterprises and has formed a set of relatively perfect theoretical...
According to the disadvantages of large mean square error (MSE) and slow convergence rate of constant modulus algorithm (CMA), a fractionally spaced combining with spatial diversity blind equalization algorithm based on wavelet transformation (WT-FS-SDE-CMA) was proposed. In this proposed algorithm, spatial diversity technique was applied to blind equalizer to reduce effect of multi-path fading channel...
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