Results 1 - 10 of 2,720

An asymmetric suboptimization approach to aerostructural optimization

by Ian R. Chittick, et al. , 2008
"... An asymmetric suboptimization method for performing multidisciplinary design optimization is introduced. The objective of the proposed method is to improve the overall efficiency of aerostructural optimization, by simplifying the system-level problem, and thereby reducing the number of calls to a p ..."
Abstract - Cited by 8 (5 self) - Add to MetaCart
and structural analyses, and a thorough performance comparison is made between the new approach and the conventional multidisciplinary feasible method. The asymmetric suboptimization method is found to be the more efficient approach when it adequately simplifies the system-level problem, or when there is a large

A framework for information systems architecture.

by J A Zachman - IBM Syst. J., , 1987
"... With increasing size and complexity of the implementations of information systems, it is necessary to use some logical construct (or architecture) for defining and controlling the interfaces and the integration of all of the components of the system. This paper defines information systems architect ..."
Abstract - Cited by 546 (0 self) - Add to MetaCart
in complexity in information systems. The inherent limitations of the then-available 4K machines, for example, constrained design and necessitated suboptimal approaches for automating a business. Current technology is rapidly removing both conceptual and financial constraints. It is not hard to speculate about

A Fast Suboptimal Approach to Error Concealment in Encoded Video Streams

by Paul Salama, Ness Shroff, Edward J. Delp - Proceedings of the International Conference on Image Processing , 1997
"... In ATM networks cell loss or channel errors can cause data to be dropped in the channel. When digital video is transmitted over these networks one must be able to reconstruct the missing data so that the impact of these errors is minimized. In this paper we describe a Bayesian approach to concealing ..."
Abstract - Cited by 12 (4 self) - Add to MetaCart
In ATM networks cell loss or channel errors can cause data to be dropped in the channel. When digital video is transmitted over these networks one must be able to reconstruct the missing data so that the impact of these errors is minimized. In this paper we describe a Bayesian approach

Monopolistic competition and optimum product diversity. The American Economic Review,

by Avinash K Dixit , Joseph E Stiglitz , Harold Hotelling , Nicholas Stern , Kelvin Lancaster , Stiglitz , 1977
"... The basic issue concerning production in welfare economics is whether a market solution will yield the socially optimum kinds and quantities of commodities. It is well known that problems can arise for three broad reasons: distributive justice; external effects; and scale economies. This paper is c ..."
Abstract - Cited by 1911 (5 self) - Add to MetaCart
violate the marginal condition.2 Thus we expect a market solution to be suboptimal. However, a much more precise structure must be put on the problem if we are to understand the nature of the bias involved. It is useful to think of the question as one of quantity versus diversity. With scale economies

A NEW SUBOPTIMAL APPROACH TO THE FILTERING PROBLEM FOR CUBIC-SENSOR-LIKE NONLINEAR SYSTEMS

by Istituto Di, Analisi Dei, Sistemi Informatica, F. Carravetta, A. Germani, M. K. Shuakayev, R. Dicembre
"... The ltering problem for a nice class of nonlinear stochastic multivariable systems is here considered. The state equation is an Ito bilinear stochastic dierential equation, whereas the output process is given by a linear transformation of the state powers, corrupted by multiplicative noise. This cla ..."
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. This class includes bilinear stochastic systems and, moreover, it is a generalization of the well known \cubic sensor", for which the nonexistence of nite-dimensional lters was proved. The aim of this paper is to present a new approach consisting in searching for suboptimal state-estimates instead

Domain-Specific Languages: An Annotated Bibliography

by Arie Van Deursen, Paul Klint, Joost Visser - ACM SIGPLAN NOTICES , 2000
"... We survey the literature available on the topic of domain-specific languages as used for the construction and maintenance of software systems. We list a selection of 75 key publications in the area, and provide a summary for each of the papers. Moreover, we discuss terminology, risks and benefits, e ..."
Abstract - Cited by 372 (11 self) - Add to MetaCart
certain area, but such a solution may be suboptimal. A specific approach provides a much better solution for a smaller set of problems. One of the incarnations of this dichotomy in computer science is the topic of this annotated bibliography: domain-specific languages versus generic programming languages

Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels

by Quentin H. Spencer, A. Lee Swindlehurst, Martin Haardt - IEEE TRANS. SIGNAL PROCESSING , 2004
"... The use of space-division multiple access (SDMA) in the downlink of a multiuser multiple-input, multiple-output (MIMO) wireless communications network can provide a substantial gain in system throughput. The challenge in such multiuser systems is designing transmit vectors while considering the co-c ..."
Abstract - Cited by 371 (29 self) - Add to MetaCart
there are multiple antennas at each receiver. It is easily adapted to optimize for either maximum transmission rate or minimum power and approaches the optimal solution at high SNR. The second, known as “successive optimization, ” is an alternative method for solving the power minimization problem one user at a time

X-mac: A short preamble mac protocol for duty-cycled wireless sensor networks

by Michael Buettner, Gary V. Yee, Eric Anderson, Richard Han - in SenSys , 2006
"... In this paper we present X-MAC, a low power MAC protocol for wireless sensor networks (WSNs). Standard MAC protocols developed for duty-cycled WSNs such as B-MAC, which is the default MAC protocol for TinyOS, employ an extended preamble and preamble sampling. While this “low power listening ” approa ..."
Abstract - Cited by 360 (0 self) - Add to MetaCart
” approach is simple, asynchronous, and energy-efficient, the long preamble introduces excess latency at each hop, is suboptimal in terms of energy consumption, and suffers from excess energy consumption at nontarget receivers. X-MAC proposes solutions to each of these problems by employing a shortened

HAMMER: hierarchical attribute matching mechanism for elastic registration

by Dinggang Shen, Christos Davatzikos - IEEE Trans. on Medical Imaging , 2002
"... A new approach is presented for elastic registration of medical images, and is applied to magnetic resonance images of the brain. Experimental results demonstrate remarkably high accuracy in superposition of images from different subjects, thus enabling very precise localization of morphological cha ..."
Abstract - Cited by 278 (95 self) - Add to MetaCart
A new approach is presented for elastic registration of medical images, and is applied to magnetic resonance images of the brain. Experimental results demonstrate remarkably high accuracy in superposition of images from different subjects, thus enabling very precise localization of morphological

Suboptimal and anytime . . .

by Ethan Burns, Seth Lemons, Wheeler Ruml, Rong Zhou , 2009
"... In order to scale with modern processors, planning algorithms must become multi-threaded. In this paper, we present parallel shared-memory algorithms for two problems that underlie many planning systems: suboptimal and anytime heuristic search. We extend a recently-proposed approach for parallel opt ..."
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In order to scale with modern processors, planning algorithms must become multi-threaded. In this paper, we present parallel shared-memory algorithms for two problems that underlie many planning systems: suboptimal and anytime heuristic search. We extend a recently-proposed approach for parallel
Results 1 - 10 of 2,720