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Two square 0, 1 matrices A, B are a pair of Lehman matrices if AB T = J + dI, where J is the matrix of all 1s and d is a positive integer. It is known that there are infinitely many such matrices when d = 1, and these matrices are called thin Lehman matrices. An induced subgraph of the Johnson graph may be defined given any Lehman matrix, where the vertices… (More)

Minimally nonideal matrices are a key to understanding when the set covering problem can be solved using linear programming. The complete classification of minimally nonideal matrices is an open problem. One of the most important results on these matrices comes from a theorem of Lehman, which gives a property of the core of a minimally nonideal matrix.… (More)

- Yuzhou Wang, Jonathan Singer, Haim H Bau, Jonathan Wang, Haim H Bau Singer, Yuzhou Wang +6 others
- 2015

It is demonstrated experimentally and theoretically that through the use of an active (feedback) controller one can dramatically modify the nature of the flow in a toroidal thermal convection loop heated from below and cooled from above. In particular, we show how a simple control strategy can be used to suppress (laminarize) the naturally occurring chaotic… (More)

- Jonathan Wang, Mishra, Rakesh, Jing Wang, Zhijie Xu, Jonathan Pickering +1 other
- 2015

Users may access full items free of charge; copies of full text items generally can be reproduced, displayed or performed and given to third parties in any format or medium for personal research or study, educational or not-for-profit purposes without prior permission or charge, provided: • The authors, title and full bibliographic details is credited in… (More)

- Somchaya Liemhetcharat, Manuela M Veloso, Howie Choset, M Bernardine Dias, Peter Stone, Suzanne Jiaqi +13 others
- 2013

Forming an effective multi-robot team to perform a task is a key problem in many domains. The performance of a multi-robot team depends on the robots the team is composed of, where each robot has different capabilities. Team performance has previously been modeled as the sum of single-robot capabilities, and these capabilities are assumed to be known. Is… (More)

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