A new robust adaptive control design synthesis, which employs both high-order neural networks and math-analytical results, for a class of complex nonlinear mechatronic systems possessing similarity property has been d...
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In many applications of wireless ad hoc networks, wireless nodes are owned by rational and intelligent users. In this paper, we call nodes selfish if they are owned by independent users and their only objective is to ...
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In many applications of wireless ad hoc networks, wireless nodes are owned by rational and intelligent users. In this paper, we call nodes selfish if they are owned by independent users and their only objective is to maximize their individual goals. In such situations, it may not be possible to use the existing protocols for wireless ad hoc networks as these protocols assume that nodes follow the prescribed protocol without deviation. Stimulating cooperation among these nodes is an interesting and challenging problem. Providing incentives and pricing the transactions are well known approaches to stimulate cooperation. In this paper, we present a game theoretic framework for truthful broadcast protocol and strategy proof pricing mechanism called immediate predecessor node pricing mechanism (IPNPM). The phrase strategy proof here means that truth revelation of cost is a weakly dominant-strategy (in game theoretic terms) for each node. In order to steer our mechanism-design approach towards practical implementation, we compute the payments to nodes using a distributed algorithm. We also propose a new protocol for broadcast in wireless ad hoc network with selfish nodes based on IPNPM. The features of the proposed broadcast protocol are reliability and a significantly reduced number of packet forwards compared to the number of network nodes, which in turn leads to less system-wide power consumption to broadcast a single packet. Our simulation results show the efficacy of the proposed broadcast protocol
In this paper, a novel integrated flight control and flow control system using synthetic jet arrays is presented. In the proposed system, a novel active flow control actuator, synthetic-jets-instrumented-wingtips were...
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ISBN:
(纸本)1563478196
In this paper, a novel integrated flight control and flow control system using synthetic jet arrays is presented. In the proposed system, a novel active flow control actuator, synthetic-jets-instrumented-wingtips were designed to enhance or replace traditional roll control of a specified airplane. Wind tunnel experiments were conducted to obtain the dynamic model of the synthetic-jets-instrumented-wing-tips. A closed-loop active flow control system was developed to reattach the flow at high angle of attacks. A high fidelity dynamic model for the airplane with the designed synthetic-jets-instrumented- wing-tips was developed based on wind tunnel experiments. A nonlinear integrated flight control and flow control system was developed and tested in simulations. Simulation results showed that the synthetic-jets-instrumented-wing-tips, in conjunction with the elevator and rudder, can effectively control the Cessna's attitude.
In this paper, we propose a novel method of automatically combining images of a scene at different time intervals by image fusion. All the important information of the original low quality nighttime images is combined...
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In this paper, we propose a novel method of automatically combining images of a scene at different time intervals by image fusion. All the important information of the original low quality nighttime images is combined with the context from a high quality image of the daytime at the same viewpoint. The fused image contains a comprehensive description of the scene which is more useful for human visual and machine perception. Experimental results show that the proposed method is robust and effective
In this paper, a novel steganalysis method based on statistical analysis of empirical matrix (EM) is proposed to detect the presence of hidden message in an image. The projection histogram (PH) of EM is used to extrac...
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In this paper, a novel steganalysis method based on statistical analysis of empirical matrix (EM) is proposed to detect the presence of hidden message in an image. The projection histogram (PH) of EM is used to extract features composed of two parts: the moments of PH and the moments of the characteristic function of PH. Also, features extracted from prediction-error image by Yun Q. Shi et al, (2005) are included to enhance performance. SVM is utilized as classifier. A test database is constructed, based on which a detailed test for different categories of features and a comparison with methods in prior arts are conducted. Experiments show that the features we proposed are more effective than prior arts and our steganalysis method could blindly detect the presence of data hiding for various embedding schemes with high performance
Much attention has been paid upon network data flow control in recent years. The main problem in this field is how to design good algorithm or control law for flow rate of network data flow sources and for updated pri...
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The goal to control the dynamics of high-rise buildings either to ameliorate the damage or prevent their destruction when subject to an earthquake excitation has been subject of extensive research. All known control d...
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In this paper, the vision-based navigation problem for mobile robots in indoor environments is discussed. Corridor guidelines between the walls and the floor are used to guide the robot to move in the middle of the ha...
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In this paper, the vision-based navigation problem for mobile robots in indoor environments is discussed. Corridor guidelines between the walls and the floor are used to guide the robot to move in the middle of the hallway. A neural network method is proposed to calibrate the camera, and then the corridor guidelines are transformed from image coordinates to robot coordinates. The corridor guidelines are extracted using the least square estimator. The backstepping method is employed to design the controller that guarantees the robot to move in the desired path. Experimental and simulation results show the efficiency of the proposed method
The problem of path planning of mobile robots typically consists of two subproblems: path generation and path tracking. In this paper, the path of a mobile robot is generated by a sequence of straight lines, and then ...
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The problem of path planning of mobile robots typically consists of two subproblems: path generation and path tracking. In this paper, the path of a mobile robot is generated by a sequence of straight lines, and then the kinematic controller is designed by using coordinate transformation in order to drive the robot to move in the desired path. Stability of the proposed controller is guaranteed by the Lyapunov theory. Simulation results show the efficiency of the proposed method
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