The success of TURING Test technologies for system validation depends on the quality of the human expertise behind the system. The authors developed models of collective and individual human expertise, which are short...
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Testing plays an important role in the maintenance of component based software development. Test adequacy for component testing is one of the hardest issues for component testing. To tackle this problem, it is a natur...
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Testing plays an important role in the maintenance of component based software development. Test adequacy for component testing is one of the hardest issues for component testing. To tackle this problem, it is a natural idea to apply mutation testing, which is a fault-based testing method used for measuring test adequacy, for component contracts, whose aim is to improve the testability of the component. Though powerful, mutation testing is usually very computation-expensive, as many mutants need to be produced and executed in mutation testing. In this paper, we propose a contract-based mutation technique for testing components. Based on the discordance between contracts and specification, our approach employs a set of high level contract mutation operators. The experimental results show that these operators can greatly reduce the number of mutants compared with traditional mutation operators. At the same time, the contract-based mutation using our contract mutation operators can provide almost the same ability as that of using traditional mutation operators. Moreover, effective test suite can be produced to reduce the maintenance effort.
Cryptography as an ancient subject is endowed with new vigor by chaos theory. Cryptography protects the security of today's ubiquitous Internet communication, which as an open network is vulnerable to attack. In t...
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Cryptography as an ancient subject is endowed with new vigor by chaos theory. Cryptography protects the security of today's ubiquitous Internet communication, which as an open network is vulnerable to attack. In this paper, chaos-based cryptography is surveyed with focus on designing chaotic pseudo-random number generators (CPRNGs) for stream cipher and their chip implementation. The properties of the proposed CPRNG are analyzed.
This paper presents a novel neural network integrating both Gauss neural network and Chebyshev neural network. The Gauss-Chebyshev neural networks take advantages of the for local approximation ability, but the Chebys...
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This paper presents a novel neural network integrating both Gauss neural network and Chebyshev neural network. The Gauss-Chebyshev neural networks take advantages of the for local approximation ability, but the Chebyshev one for global generalization ability. Numerical experiments confirm the new strategy on the better performance in comparison with Gauss neural networks. Furthermore, under the same initialization conditions, Gauss-Chebyshev neural network is more efficient than Gauss-Sigmoid neural network for regression application. All eight functions tested from the experiments show the improvements of the proposed neural networks.
This paper describes the robust reading competitions for ICDAR 2003. With the rapid growth in research over the last few years on recognizing text in natural scenes, there is an urgent need to establish some common be...
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This paper presents a reusable framework for coordinating a team of mobile robots that can accomplish high level or tightly coupled missions, which could not be easily achieved using single robot solutions. To complet...
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The controller design and implementation of a handheld surgical robot is presented. During the treatment of human bones the robot is able to compensate un-voluntary movements of the surgeon and of the patient and to f...
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Taking Shanghai science and Technology Museum as the operation target, the robot named skycleaner which is totally actuated by pneumatic cylinders and is sucked to the glass walls with vacuum suckers is presented. In ...
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ISBN:
(纸本)0780384636
Taking Shanghai science and Technology Museum as the operation target, the robot named skycleaner which is totally actuated by pneumatic cylinders and is sucked to the glass walls with vacuum suckers is presented. In order to solve the problems of lower stiffness and the nonlinear movement characteristic of the pneumatic system, a method of segment and variable bang-bang controller is proposed to implement the accurate control of the position servo system using the principle of pneumatic pulse width-modulation (PWM). Testing results show that the controller can effectively improve the control quality. This implies that the method can meet the requirements of realization.
The interaction balance method (IBM) with fuzzy constraints is proposed for large-scale industrial processes under hierarchical steady-state optimization with the consideration of the model-reality difference and the ...
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This paper reviews what the first Author and his Group have been investigating for the past decade in the on-line steady-state hierarchical intelligent control and optimization of large-scale industrial processes (LSI...
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