We propose a text scanner, which detects wide text strings in a sequence of scene images. For scene text detection, we use a multiple-CAMShift algorithm on a text probability image produced by a multi-layer perceptron...
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The performance of a robot operated over a data network does not only depend on a control algorithm used, but also on network conditions. Providing network QoS (quality-of-service) to a networked robot system could si...
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The performance of a robot operated over a data network does not only depend on a control algorithm used, but also on network conditions. Providing network QoS (quality-of-service) to a networked robot system could significantly improve its system performances. However, the network QoS can degrade due to several factors, such as congestion and interference, and can affect the overall system performances. We propose a gain adaptation approach to compensate deteriorative changes in network QoS in order to maintain the performances of a robot system as much as possible. The approach is demonstrated by path tracking control of networked differential drive mobile robot over a QoS enabled network. The simulation results show that when the gain adaptation is applied, the robot can effectively tolerate network QoS deterioration, and increase the overall system robustness. The concept of gain adaptation can be easily extended to other network-based control applications.
A biologically inspired neural computation model is proposed for dynamic planning and tracking control of robots. The dynamic environment is represented by a neural activity landscape of a topologically organized neur...
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A biologically inspired neural computation model is proposed for dynamic planning and tracking control of robots. The dynamic environment is represented by a neural activity landscape of a topologically organized neural network, where each neuron is characterized by a shunting equation. The collision-free path is generated in real-time through the activity landscape without any prior knowledge of the dynamic environment. The real-time tracking control of robots to follow the planned path is also designed using shunting equations. The effectiveness is demonstrated through case studies. Simulation in several computer-synthesized virtual environments further demonstrates the advantages of the proposed approach.
Vertical Bell laboratories Layered Space-Time (V-BLAST) is a promising system that realizes the enormous capacity of multiple-input multiple-output (MIMO) communications. In this paper, we present an extension of V-BL...
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There have been various receiver-based techniques for performance improvement of wireless communications systems. However, receiver-based techniques have a restricted application in the down-link because they increase...
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It is well known that IP over WDM is a promising and simplified network architecture for future high speed networking, in which the EP layer can be used as the control plane to manage the optical layer, in addition to...
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It is well known that IP over WDM is a promising and simplified network architecture for future high speed networking, in which the EP layer can be used as the control plane to manage the optical layer, in addition to providing user's data transmission functionalities. Among others, key functions of the IP control plane are the provisioning of optical circuits for end-to-end data transmission between routers and fault management. An open question is what protocols are most suitable for providing such functions. The paper describes a suite of protocols that was implemented to accomplish both optical circuit provisioning and fault management in an EP over WDM network. The protocols were implemented and tested using the /spl Omega/ (Optical Mesh network for Emerging Gigabit Applications) test-bed. Experimental results indicate good scalability properties of the implemented protocols. For example, it is possible to handle more than a hundred wavelengths with restoration times that are below few tens of milliseconds.
UML is widely accepted and applied by the international software industry. UML is a powerful language for Object oriented modeling, designing, and implementing software systems, but its Use Case method for requirem...
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UML is widely accepted and applied by the international software industry. UML is a powerful language for Object oriented modeling, designing, and implementing software systems, but its Use Case method for requirement analysis and modeling software patterns has some explicit drawbacks. For more complete UML, this paper proposes the Role Use Case modeling and its glyphs, and provides an instance of requirement analysis using Role Use Case method. Uses the Role Model to modeling software pattern at knowledge level. This paper also extends the UML Meta Model and accentuates “RM before UML's class Modeling”.
An overview on emerging IP traffic monitoring is presented. Important parameters to characterize the traffic, network and QoS, are discussed. The infrastructure and methodology to measure those parameters directly or ...
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Bluetooth has been regarded as a promising solution for wireless connection between hand-held devices. In Bluetooth, a message is segmented into short packets to be transmitted over different frequency bands to random...
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In dynamically changing environments, the performance of a standard evolutionary algorithm deteriorates. This is due to the fact that the population, which is considered to contain the history of the evolutionary proc...
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