The property of the soft magnetic composite (SMC) material is introduced. Take the traditional material used for electric machine, i.e. the silicon steel lamination, as the reference, this paper summarizes the applica...
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Based on psychological attribution theory, this paper presents a domain-independent computational model to automate social causality and responsibility judgment according to an agent's causal knowledge and observa...
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OFDM is promising for underwater acoustic (UWA) communications due to its potential to combat the large delay spread. However, the performance of the OFDM system is seriously deteriorated by the inter-carrier interfer...
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ISBN:
(纸本)9781479982981
OFDM is promising for underwater acoustic (UWA) communications due to its potential to combat the large delay spread. However, the performance of the OFDM system is seriously deteriorated by the inter-carrier interference (ICI) caused by the transmitter/receiver motion and ocean waves. In this paper, we propose a novel ICI countermeasure. The key idea is to inactivate partial subcarriers according to index modulation and meanwhile transmit signals with opposite polarity on two adjacent active subcarriers for ICI self cancellation. Simulation results validate that the proposed scheme achieves much better bit error rate (BER) performance than many existing schemes in UWA communications.
A docking approach for child robot suitable for marsupial robot was designed in this paper. The mother robot obtained the posture of child robot relative to the docking entrance by visual perception to instruct the ch...
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A docking approach for child robot suitable for marsupial robot was designed in this paper. The mother robot obtained the posture of child robot relative to the docking entrance by visual perception to instruct the child robot. In each of left, right and back sides of child robot, there was a color symbol with two colors arranged vertically. The mother robot extracted the color borderline of each symbol it observed in a way of connection growing, and then the position information of corresponding color symbol in image as well as the length ratio could be acquired to guide the motion of child robot. Finally, the child robot entered the docking station in an appropriate posture. This approach was verified by experimental results.
The role of dynamical topologies in the evolution of cooperation has received considerable attention, as some studies have demonstrated that dynamical networks are much better than static networks in terms of boosting...
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The role of dynamical topologies in the evolution of cooperation has received considerable attention, as some studies have demonstrated that dynamical networks are much better than static networks in terms of boosting cooperation. Here we study a dynamical model of evolution of cooperation on stochastic dynamical networks in which there are no permanent partners to each agent. Whenever a new link is created, its duration is randomly assigned without any bias or preference. We allow the agent to adaptively adjust the duration of each link during the evolution in accordance with the feedback from game interactions. By Monte Carlo simulations, we find that cooperation can be remarkably promoted by this adaptive dynamical linking mechanism both for the game of pairwise interactions, such as the Prisoner's Dilemma game (PDG), and for the game of group interactions, illustrated by the public goods game (PGG). And the faster the adjusting rate, the more successful the evolution of cooperation. We also show that in this context weak selection favors cooperation much more than strong selection does. What is particularly meaningful is that the prosperity of cooperation in this study indicates that the rationality and selfishness of a single agent in adjusting social ties can lead to the progress of altruism of the whole population.
A novel high-performance, low-power and generic-structured distributed visual localization system is proposed for augmenting mobile-robot navigation in intelligent environment. To overcome the influence on visual targ...
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A novel high-performance, low-power and generic-structured distributed visual localization system is proposed for augmenting mobile-robot navigation in intelligent environment. To overcome the influence on visual target perception caused by senor, clustering background and lighting condition changes, a projection based color target recognization method is employed. A new localization algorithm combining Tsai's calibration and polynomial fitting is proposed, as well as a multi-camera collaborative strategy. This improves the accuracy and reliability of the global visual localization in a complex environment. Hardware and software structure of smart sensing nodes based on embedded DSP TMS320DM642 is developed. key functions of real-time visual information acquisition, processing and network interface are integrated in the smart nodes. Application and experiments with the mobile robot navigation control platform verifies the localization accuracy as well as other favorable performances.
Supervisory control reconfiguration has been paid more attention due to its capacity of handling the uncertainties including resource failures, capability degradation, and task changes in discrete event systems. Howev...
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An object grasping method based on fuzzy approaching for a mobile manipulator with an Eye-in-Hand CMOS (complementary metal-oxide-semiconductor transistor) camera was proposed. The approaching guidance identifier with...
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An object grasping method based on fuzzy approaching for a mobile manipulator with an Eye-in-Hand CMOS (complementary metal-oxide-semiconductor transistor) camera was proposed. The approaching guidance identifier with double cross was recognized by the mobile manipulator, and the angle between the line from mobile platform to the center of the identifier and its heading direction were served as the inputs of fuzzy controller. A double input and single output fuzzy controller was designed to regulate the direction of the mobile platform for smooth approaching. When the object (a red cylinder with double black lines) was in the workspace of manipulator, the mobile platform stops and the object was grasped by the manipulator with its joint angles solved based on inverse kinematics. Experiments results show the validity of the proposed approach.
A motion control method for mobile robot based on sub-regions evaluation in local sensing environment was proposed. Firstly, the local environment was divided into multiple sub-regions based on the sensing information...
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A motion control method for mobile robot based on sub-regions evaluation in local sensing environment was proposed. Firstly, the local environment was divided into multiple sub-regions based on the sensing information provided by laser range finder. Then, each sub-region was evaluated by considering the distance influence factor, as well as visual guide and memory-based judgment. Finally, the optimal sub-region adapted to current environment will be used for motion decision of mobile robot. Experimental results show that the proposed method is capable of dividing sensing environment into multiple sub-regions and producing the optimal sub-region adapted to current environment. Motion control for robot was realized and the effectiveness of the proposed method was verified.
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