作者：
Lee, HuaImaging Systems Laboratory
Department of Electrical and Computer Engineering University of California Santa Barbara CA 93106
The ground-penetrating radar (GPR) systems currently deployed in field applications can be classified into two major types, pulse-echo and step-frequency frequency modulated continuous-wave (FMCW) devices, correspondi...
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The ground-penetrating radar (GPR) systems currently deployed in field applications can be classified into two major types, pulse-echo and step-frequency frequency modulated continuous-wave (FMCW) devices, corresponding to the distinct features of the illumination waveforms. With the addition of synthetic-aperture scans, both versions can be directly applied to high-resolution tomographic imaging. This paper presents the tomographic image reconstruction algorithms for these two operating modalities based on one single framework of backward propagation image formation. In addition to the theoretical analysis and mathematical modeling, this paper presents the algorithm structures for both types of systems as well as results from full-scale field experiments.
The purpose of this paper is to present a modified version of the ant colony system (ACS) algorithm. The modified ACS algorithm is faster and it has a better performance than the standard ACS algorithm. We have establ...
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The purpose of this paper is to present a modified version of the ant colony system (ACS) algorithm. The modified ACS algorithm is faster and it has a better performance than the standard ACS algorithm. We have established a set of local rules/modifications, that do improve the performance of the standard ACS and these are reported here.
The increasing complexity, heterogeneity and dynamism of networks, systems, services applications have made our computational/information infrastructure brittle, unmanageable and insecure. This has necessitated the in...
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In traditional internal combustion engines, a camshaft acts on the valve stems to open and close the valves. Valve timing is fixed relative to piston position. On the other hand, if a valve is flexibly controlled by a...
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In order to determine congruence between proposed organizational architectures and evolving mission requirements, an executable model was developed in support of a subject experiment testing the hypothesis that an org...
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In this research it is claimed that engineering education increases the positivistic tendencies of students regarding to the social problems. A theoretical background is given in the introduction and literature review...
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作者：
Tzouvaras, VassilisStamou, GiorgosKollias, StefanosImage
Video and Multimedia Laboratory Institute for Computer and Communication Systems Department of electrical and Computer Engineering National Technical university of Athens Greece
Fuzzy relations as representational tools and fuzzy compositional operators as reasoning components, are user in this paper in order to represent knowledge expressed in semantic rules. Furthermore, neural representati...
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The capacity to generalize is the most important characteristic in neural networks. However, the generalization capacity is lost when over-fitting occurs during the neural network training process; i.e., although the ...
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The capacity to generalize is the most important characteristic in neural networks. However, the generalization capacity is lost when over-fitting occurs during the neural network training process; i.e., although the error after the training process is very small, when new data is presented to the neural network the error is large. An approach aiming to improve the neural network generalization capacity is presented in this work.
An approach aiming to formulate the mobile network resource allocation problem is proposed here. In order to formulate the resource allocation problem, the way network resources are to be counted is defined. Then, the...
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An approach aiming to formulate the mobile network resource allocation problem is proposed here. In order to formulate the resource allocation problem, the way network resources are to be counted is defined. Then, the resource allocation problem is expressed as a multidimensional knapsack problem. The knapsack problem is relaxed and a constrained optimisation linear programming problem is obtained. A series of pseudo-utility values is obtained from the solution of the linear programming problem. The pseudo-utility values are used to establish an order by which the calls/terminals/users are to be attended by the network.
Research on networked applications that utilize multimodal information about their users' current emotional state are presently at the forefront of interest of the computer vision and artificial intelligence commu...
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