In this paper, an adaptive decentralized controller is presented to attenuate the transversal vibration of a flexible cablestayed bridge induced by seismic excitation, in which only local sensor information has been u...
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We present a Lyapunov theorem for systems that are not locally Lipschitz. The Lyapunov function used is only nonnegative semidefinite instead of positive definite.
We present a Lyapunov theorem for systems that are not locally Lipschitz. The Lyapunov function used is only nonnegative semidefinite instead of positive definite.
This paper gives a new generalization of Lyapunov theorems. Tt shows how to explore the stability properties of a given system by using a Lyapunov function which is nonnegative semidefinite, rather than positive defin...
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This paper gives a new generalization of Lyapunov theorems. Tt shows how to explore the stability properties of a given system by using a Lyapunov function which is nonnegative semidefinite, rather than positive definite. Several examples and an application to the algebraic Riccati Equation are given to illustrate the new approach.
A prototype concurrent engineering tool has been developed for the preliminary design of composite topside structures for modern navy warships. This tool, named GELS for the Concurrent engineering of Layered Structure...
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A prototype concurrent engineering tool has been developed for the preliminary design of composite topside structures for modern navy warships. This tool, named GELS for the Concurrent engineering of Layered Structures, provides designers with an immediate assessment of the impacts of their decisions on several disciplines which are important to the performance of a modern naval topside structure, including electromagnetic interference effects (EMI), radar cross section (RCS), structural integrity, cost, and weight. Preliminary analysis modules in each of these disciplines are integrated to operate from a common set of design variables and a common materials database. Performance in each discipline and an overall fitness function for the concept are then evaluated. A graphical user interface (GUI) is used to define requirements and to display the results from the technical analysis modules. Optimization techniques, including feasible sequential quadratic programming (FSQP) and exhaustive search are used to modify the design variables to satisfy all requirements simultaneously. The development of this tool, the technical modules, and their integration are discussed noting the decisions and compromises required to develop and integrate the modules into a prototype conceptual design tool.
There have been some new developments of an interactive analysis for the multi-spectral images. Recently the authors have proposed an interactive analysis method for classification using a Hilbert curve which is a one...
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There have been some new developments of an interactive analysis for the multi-spectral images. Recently the authors have proposed an interactive analysis method for classification using a Hilbert curve which is a one-to-one mapping and takes a neighborhood between N-dimensional space and one-dimensional space into consideration. In order to analyze large scale multi-spectral images, the authors divide a large scale image into subimages which can be analyzed using their proposed method. A problem is that after classifying one of the subimages, how they classify the rest of the subimages using this result effectively. They present a solution of this problem using a tree structure expression. They assign a reliability measure to each pixels on the rest. The reliability measure is based on a distance from a center of a cluster, and the center is considered occurrence information. For the low reliable data, they apply their interactive analysis method for classification again. In the experiment using a LANDSAT image data, they confirmed the effectiveness of the reliability measure because category boundaries on the rest have lower reliability.
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