Two identification models are obtained for multivariable ARX systems by different parameterization, and the corresponding two least squares and two stochastic gradient algorithms are given based on the lest squares pr...
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Two identification models are obtained for multivariable ARX systems by different parameterization, and the corresponding two least squares and two stochastic gradient algorithms are given based on the lest squares principle and the stochastic gradient search principle and minimizing different cost functions. The performances of these algorithms are analyzed and compared by the simulation tests.
We proposed a novel fractal video coding methodusing fast block-matching motion estimation technology to overcome the drawback of the time-consuming character in the fractal coding. As fractal encoding essentially spe...
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To improve the level of supervision and management for cargo transport vehicles, especially trucks carrying coal, it is important to develop transport vehicles remote monitoring system. The system uses GPS, GSM/3G, GI...
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To improve the level of supervision and management for cargo transport vehicles, especially trucks carrying coal, it is important to develop transport vehicles remote monitoring system. The system uses GPS, GSM/3G, GIS, computer network communication and data processing technology, installs a variety of state sensors on truck, uses embedded intelligent terminal based on ARM9 to obtain states of the cargo vehicle, and achieve real-time acquisition, transmission and analysis of these parameters in the remote monitoring center. Through a dynamic monitoring of the transport vehicles, manager can ensures that the vehicles are traveling in accordance with the approved lines. Once vehicles appear in accident, manager can quickly locate the accident point, implement treatment timely. It has provided a powerful management support with a rapid reacting capacity for the regulatory authorities, transport companies by information technology.
Based on the classical fractal video coding scheme, a novel hybrid video coding scheme joint fractal and objectbased function is proposed. A new technique of object-based fractal video coding in which each object can ...
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From perspective of objectivity of trust, a group Trust model which is used to depict constraint relationships among individuals in a particular group through covering four basic constraint patterns and their nesting;...
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From perspective of objectivity of trust, a group Trust model which is used to depict constraint relationships among individuals in a particular group through covering four basic constraint patterns and their nesting; what's more, gauging methods of direct trust degree and recommendation trust degree of basic constraint patterns and their nesting are brought up based on Bayesian method, and these methods remarkably support group trust relationship, especially trust relationship of software groups. Analysis on expressive power and validity of group Trust model proves that this model has outstanding adaptability and practicability.
This paper considers about the control problem for an underactuated quadrotor UAV system with model parameter uncertainty. Backstepping based techniques are utilized to design a nonlinear adaptive controller which can...
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ISBN:
(纸本)9781424474264
This paper considers about the control problem for an underactuated quadrotor UAV system with model parameter uncertainty. Backstepping based techniques are utilized to design a nonlinear adaptive controller which can compensate for the mass uncertainty of the vehicle. Lyapunov based stability analysis shows that the proposed control design yields asymptotic tracking for the UAV's motion in x, y, z direction and the yaw rotation, while keep the stability of the closed loop dynamics of the quadrotor UAV. Numerical simulation results are provided to show the good tracking performance of proposed control laws.
Attitude determination with navigation satellites is a key technology in aviation, marine and land navigation. In the method based on carrier phase difference, the double difference integer ambiguity solving is import...
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Attitude determination with navigation satellites is a key technology in aviation, marine and land navigation. In the method based on carrier phase difference, the double difference integer ambiguity solving is important and difficult. This paper adopts Discrete Particle Swarm Optimization to search for the optimal integer ambiguity directly without the decorrelation of ambiguity, and calculates the baseline vector consequently. This method can improve the efficiency of integer ambiguity solving, so as to be applied in dynamic attitude determination. The experimental results show the validity of this method.
This paper presents a novel measurement ways based on grid based measurement resources integration for the current requirements of dynamic condition, reconfiguration and collaboration for the modern production cases. ...
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This paper presents a novel measurement ways based on grid based measurement resources integration for the current requirements of dynamic condition, reconfiguration and collaboration for the modern production cases. Based on the analysis of the principle of the integrated measurement ways, the dynamic reconfigurable strategies are discussed, and the implemental models is presented. To carry out the data exchange among shared measurement services, the notion of service chains and global virtual measurement bus are studied, which is based on the shared service collaboration. The applying measurement cases show that the proposed way can solve the problems of measurement resource coupling and the dynamic measurement reconfiguration with high reliability and high effectiveness.
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