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In this paper, we consider the distributed optimization problem over a directed network. In such practical network case, the double-stochasticity of mixing matrices and consensus may generally be violated. To deal with these challenges, we use non-doubly stochastic matrices and develop a new algorithm called ExtraPush via combining two well-known distributed algorithms, i.e., Extra and subgradient-push...
Projective distortion caused by tilted camera brings great inconvenience to subsequent image processing and pattern recognition. In this paper, a method based on projective geometry is introduced to correct the projective distortion of infrared images. The dual conic in distortion image, which contains all the information of projective rectification, is identified firstly, and then the projective...
Based on the fire software model and the digital city, aiming at applying virtual reality to fire prevention and fire scientific research, this paper proposes a fire prevention virtual reality architecture based on the 3D network game engine. This architecture uses the finite state machine (FSM) to control the dynamic loop structure. It gives a simulation platform structure that the fire developing,...
The main weakness of passwords is that it is vulnerable to dictionary attacks implemented by automated programs. As the EKE protocol could resist the offline dictionary attack and the CAPTCHA could avoid automatic on-line dictionary attack implemented by the attacker, in this paper, based on the two protocols, we proposed the hybrid password authentication protocols. Our new password authentication...
Interlocking system is the key equipment of railway signaling. New-type all-electronic execution unit (AEEU) for computer interlocking system is introduced. As an example of AEEU, characters and fail-safety of DC switches execution module is discussed in detail. Then some advantages of AEEU are emphasized such as reliable, a little space equipment, powerful function, building a network conveniently,...
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