Results 1 - 10 of 1,183

Hierarchical Modelling and Analysis for Spatial Data. Chapman and Hall/CRC,

by S Banerjee , B P Carlin , A E Gelfand , Chapman , / Hall , New Crc , N York; Cressie , P J Diggle , P J Ribeiro Jr , B D Ripley , 2004
"... Abstract Often, there are two streams in statistical research -one developed by practitioners and other by main stream statisticians. Development of geostatistics is a very good example where pioneering work under realistic assumptions came from mining engineers whereas it is only now that statisti ..."
Abstract - Cited by 442 (45 self) - Add to MetaCart
in There is no doubt that the availability of cheap and powerful computers has increased the interest in ML applications. With spatially correlated data, the maximization of the likelihood requires considerable computer power mainly for two numerical operations: matrix inversion and maximization in multidimensional

The Determinants of Credit Spread Changes.

by Pierre Collin-Dufresne , Robert S Goldstein , J Spencer Martin , Gurdip Bakshi , Greg Bauer , Dave Brown , Francesca Carrieri , Peter Christoffersen , Susan Christoffersen , Greg Duffee , Darrell Duffie , Vihang Errunza , Gifford Fong , Mike Gallmeyer , Laurent Gauthier , Rick Green , John Griffin , Jean Helwege , Kris Jacobs , Chris Jones , Andrew Karolyi , Dilip Madan , David Mauer , Erwan Morellec , Federico Nardari , N R Prabhala , Tony Sanders , Sergei Sarkissian , Bill Schwert , Ken Singleton , Chester Spatt , René Stulz - Journal of Finance , 2001
"... ABSTRACT Using dealer's quotes and transactions prices on straight industrial bonds, we investigate the determinants of credit spread changes. Variables that should in theory determine credit spread changes have rather limited explanatory power. Further, the residuals from this regression are ..."
Abstract - Cited by 422 (2 self) - Add to MetaCart
. They conclude that swap market-specific supply/demand shocks drive the unexplained changes in swap rates. Existing literature on credit spread changes is limited. 3 Pedrosa and Roll (1998) document considerable co-movement of credit spread changes among index portfolios of bonds from various industry, quality

Traffic Matrix Estimation: Existing Techniques and New Directions

by A. Medina , N. Taft , K. Salamatian , S. Bhattacharyya , C. Diot , 2002
"... Very few techniques have been proposed for estimating traffic matrices in the context of Internet traffic. Our work on POP-to-POP traffic matrices (TM) makes two contributions. The primary contribution is the outcome of a detailed comparative evaluation of the three existing techniques. We evaluate ..."
Abstract - Cited by 208 (14 self) - Add to MetaCart
Very few techniques have been proposed for estimating traffic matrices in the context of Internet traffic. Our work on POP-to-POP traffic matrices (TM) makes two contributions. The primary contribution is the outcome of a detailed comparative evaluation of the three existing techniques. We evaluate

The development and comparison of robust methods for estimating the fundamental matrix

by P. H. S. Torr, D. W. Murray - International Journal of Computer Vision , 1997
"... Abstract. This paper has two goals. The first is to develop a variety of robust methods for the computation of the Fundamental Matrix, the calibration-free representation of camera motion. The methods are drawn from the principal categories of robust estimators, viz. case deletion diagnostics, M-est ..."
Abstract - Cited by 266 (10 self) - Add to MetaCart
Abstract. This paper has two goals. The first is to develop a variety of robust methods for the computation of the Fundamental Matrix, the calibration-free representation of camera motion. The methods are drawn from the principal categories of robust estimators, viz. case deletion diagnostics, M-estimators

A Markov-modulated characterization of packetized voice and data traffic and related statistical multiplexer performance

by Harry Heffes, et al. - IEEE J. ON SELECTED AREAS IN COMMUN , 1986
"... We study the performance of a statistical multiplexer whose inputs consist of a superposition of packetized voice sources and data. The performance analysis predicts voice packet delay distributions, which usually have a stringent requirement, as well as data packet delay distributions. The superpos ..."
Abstract - Cited by 288 (4 self) - Add to MetaCart
incorporate practical system considerations such as finite buffers and a class of overload control mechanisms discussed in the literature. Comparisons with simulation show the methods to be accurate. The numerical results for the tails of the voice packet delay distribution show the dramatic effect of traffic

An Information-Theoretic Approach to Traffic Matrix Estimation

by Yin Zhang, Matthew Roughan, Carsten Lund, David Donoho - In Proc. ACM SIGCOMM , 2003
"... Traffic matrices are required inputs for many IP network management ..."
Abstract - Cited by 154 (16 self) - Add to MetaCart
Traffic matrices are required inputs for many IP network management

Gradually Reconfiguring Virtual Network Topologies based on Estimated Traffic Matrices

by unknown authors
"... Abstract — In this paper, we present a practical VNT (virtual network topology) reconfiguration method for large-scale IP and optical networks with traffic matrix estimation considerations. We newly introduce a partial VNT reconfiguration algorithm with multiple transition stages. By dividing the wh ..."
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Abstract — In this paper, we present a practical VNT (virtual network topology) reconfiguration method for large-scale IP and optical networks with traffic matrix estimation considerations. We newly introduce a partial VNT reconfiguration algorithm with multiple transition stages. By dividing

Structural Analysis of Network Traffic Flows

by Anukool Lakhina , Konstantina Papagiannaki, Mark Crovella, Christophe Diot, Eric D. Kolaczyk, Nina Taft , 2003
"... Network traffic arises from the superposition of Origin-Destination (OD) flows. Hence, a thorough understanding of OD flows is essential for modeling network traffic, and for addressing a wide variety of problems including traffic engineering, traffic matrix estimation, capacity planning, forecas ..."
Abstract - Cited by 165 (21 self) - Add to MetaCart
Network traffic arises from the superposition of Origin-Destination (OD) flows. Hence, a thorough understanding of OD flows is essential for modeling network traffic, and for addressing a wide variety of problems including traffic engineering, traffic matrix estimation, capacity planning

† † NTT Network Service Systems Laboratories

by unknown authors
"... Abstract In this paper, we present a practical VNT (virtual network topology) reconfiguration method for large-scale IP and Optical networks with traffic matrix estimation considerations. We newly introduce a partial VNT reconfiguration algorithm with multiple transition stages. By dividing the whol ..."
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Abstract In this paper, we present a practical VNT (virtual network topology) reconfiguration method for large-scale IP and Optical networks with traffic matrix estimation considerations. We newly introduce a partial VNT reconfiguration algorithm with multiple transition stages. By dividing

Memory bandwidth limitations of future microprocessors

by Doug Burger, James R. Goodman, Alain Kägi - IN PROCEEDINGS OF THE 23RD ANNUAL INTERNATIONAL SYMPOSIUM ON COMPUTER ARCHITECTURE , 1996
"... This paper makes the case that pin bandwidth will be a critical consideration for future microprocessors. We show that many of the techniques used to tolerate growing memory latencies do so at the expense of increased bandwidth requirements. Using a decomposition of execution time, we show that for ..."
Abstract - Cited by 226 (12 self) - Add to MetaCart
This paper makes the case that pin bandwidth will be a critical consideration for future microprocessors. We show that many of the techniques used to tolerate growing memory latencies do so at the expense of increased bandwidth requirements. Using a decomposition of execution time, we show
Results 1 - 10 of 1,183