495 research outputs found
A robust semi-definite optimization based solution to the robust order reduction problem for parametric uncertain dissipative linear systems
No full textIn this paper we address the problem of reducing the order of a linear
system affected by uncertainties from the robust dissipative perspective introduced in Barb. Firstly, we show that all major balanced truncation techniques developed and reported in the literature of the last two decades see Enns, Glover, Moore, Harshavardhana, Jonckheere, Opdenacker, Phillips) can be treated in a uniform fashion within the framework of dissipative systems. Accordingly, we shall generalize these
results to uncertain dissipative systems.
The key role is played by balancing two positive definite robust solutions to the uncertain dissipativity LMIs associated with the linear system in question and its dual. Determining the maximal level of uncertainty for which such two solutions exists and computing them efficiently is well known to be NP-hard. Our method is based on determining robust tractable approximations of these NP-hard entities by following the
novel method known as Matrix-Cube Theory. The proven results are accompanied by a numerical example
Digital control of distributed parameter systems: A state-space approach
No full textElectrical Engineering, Mathematics and Computer Scienc
Letter to F.D. Moon from A. Mitchell Salone regarding information about and photos of the Colored School in Wewoka
No full textLetter to F.D. Moon regarding a book being written on African American schools. The author asks for photos of the school and shows appreciation for how he runs the school
A Popov-theory-based approach to digital H control with measurement feedback for Pritchard¿Salamon systems
No full textA Popov-theory-based survey on digital control of infinite-dimensional systems with unboundedness
No full textNecessary conditions for fixed, finite-order l/sup 2/-optimal control of discrete-time evolution systems
No full textForesea: An installation about sea level rise at Oerol 2016
No full textForesea is the result of course 'AR0148 - landscape architecture ON site' 2016, initiated by the section Landscape Architecture at the faculty of Architecture. Central aim of this course is to express the given site in a project at the interface between landscape architecture and landscape art, which will be performed during the Oerol festival in June on the island of Terschelling. Experiences of the place and the results of research and analysis form the base of the project.Architecture and The Built EnvironmentUrbanismAR0148 - landscape architecture ON siteLandscape Architectur
Design Procedures and Field Monitoring of Submerged Barbs for Streambank Protection: TR-534, June 2007
No full textThe main objective of this study was to evaluate the hydraulic performance of riprap spurs and weirs in controlling bank erosion at the Southern part of the Raccoon River upstream U.S. Highway 169 Bridge utilizing the commercially available model FESWMS
and field monitoring. It was found based on a 2 year monitoring and numerical modeling that the design of structures was overall successful, including their spacing and stability. The riprap material incorporated into the structures was directly and favorably
correlated to the flow transmission through the structure, or in other words, dictated the permeable nature of the structure. It was found that the permeable dikes and weirs chosen in this study created less volume of scour in the vicinity of the structure toes and thus have less risk comparatively to other impermeable structures to collapse. The fact that the structures permitted the transmission of flow through them it allowed fine sand particles to fill in the gaps of the rock interstices and thus cement and better
stabilize the structures. During bank-full flows the maximum scour hole was recorded away from the structures toe and the scourhole size was directly related to the protrusion angle of the structure to the flow. It was concluded that the proposed structure
inclination with respect to the main flow direction was appropriate since it provides maximum bank protection while creating the largest volume of local scour away from the structure and towards the center of the channel. Furthermore, the lowest potential for
bank erosion also occurs with the present set-up design chosen by the IDOT. About 2 ft of new material was deposited in the area located between the structures for the period extending from the construction day to May 2007. Surveys obtained by sonar and the
presence of vegetation indicate that new material has been added at the bank toes. Finally, the structures provided higher variability in bed topography forming resting pools, creating flow shade on the leeward side of the structure, and separation of bed
substrate due to different flow conditions. Another notable environmental benefit to rock riprap weirs and dikes is the creation of resting pools, especially in year 2007 (2nd year of the project). The magnitude of these benefits to aquatic habitat has been found in
the literature that is directly related to the induced scour-hole volume
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