The New Statistical Analysis of Data

Nelson, Paul I.; Anderson, T. W.; Finn, Jeremy D.

doi:10.2307/2965737

Cited by 21 publications

(37 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…vective activity in the SACZ. The Mann-Whitney U test (e.g., Anderson and Finn 1996) with a 0.05 significance level indicated that the two samples of factor-1 scores correspond to independent populations. Conversely, factor-2 score distributions cannot be considered distinct with the same level of significance.…”

Section: A Interpretation Of Factor Analysis and Convective Patternsmentioning

confidence: 99%

Extreme Precipitation Events in Southeastern South America and Large-Scale Convective Patterns in the South Atlantic Convergence Zone

Carvalho¹,

Jones²,

Liebmann³

2002

J. Climate

328

214

View full text Add to dashboard Cite

The occurrence of daily extreme precipitation events in southeast South America (São Paulo, Brazil) and the spatial features of convective activity in the South Atlantic convergence zone (SACZ) are investigated. Precipitation data from surface stations in São Paulo state from 1979 to 1996 are used to determine the frequency of occurrence of extremely heavy daily precipitation events. Daily averages of outgoing longwave radiation (OLR) are examined to characterize convective activity in the SACZ. OLR features are identified with factor analysis. Two factors explain ϳ65% of the total variance of the convective activity patterns in tropical South America and characterize events according to the intensity and extent of the OLR features over the Atlantic Ocean. The combination of factors indicates that 35% of extreme precipitation events occurred when convective activity in the SACZ was intense over large parts of tropical South America, which includes São Paulo, but with less extent toward the Atlantic Ocean. Warm SST episodes (El Niño) seem to modulate the occurrence of extremes associated with intense convection in the SACZ displaced northward of São Paulo and toward the Atlantic Ocean. The remaining events associated with weak convective activity in the SACZ suggest the role of transient systems producing extreme precipitation in São Paulo. The important contribution of the present work is the documentation of the role of orographic features for the regional distribution of extreme precipitation in São Paulo. It is shown that the regional distribution of extreme precipitation depends on both the intensity and form of the convection in the SACZ.

show abstract

Section: A Interpretation Of Factor Analysis and Convective Patternsmentioning

confidence: 99%

Extreme Precipitation Events in Southeastern South America and Large-Scale Convective Patterns in the South Atlantic Convergence Zone

Carvalho¹,

Jones²,

Liebmann³

2002

J. Climate

328

214

View full text Add to dashboard Cite

show abstract

“…The second step in the procedure consists of estimating the parameters of the identified probability distribution candidates. For this, it relies on well-known estimation procedure such as the Maximum Likelihood and the Moment Matching estimates [3,19]. Finally, once the candidate distributions parameters are estimated, they are evaluated using goodness-of-fit tests to decide if they represent a good fit to the input data and to select the best fit.…”

Section: Distribution Fittingmentioning

confidence: 99%

“…To estimate the parameters of mixture models, i.e. the parameters ω of the sub-distributions D i and the selection distribution W , one may use classical estimation techniques such as the likelihood estimate or the moment matching estimate [3,19]. However, in this setting such techniques often fail to perform the estimation.…”

Section: Learning and Fitting Techniquesmentioning

confidence: 99%

“…The second step is the model estimation, that is estimating the parameters of the model. As stated earlier one can relies on classical estimation approaches such as least squares and maximum of likelihood [3,19]. The last step of the procedure is an evaluation step.…”

Section: Learning and Fitting Techniquesmentioning

confidence: 99%

“…The substantial advances in the integrated circuits and the networks bandwidth have contributed to democratize these systems which became ubiquitous. According to the Artemis Strategic Research Agenda 2011 3 , it is estimated that there will be over 40 billion devices worldwide, that is 5 to 10 embedded devices per person on earth by 2020. While a large portion of ES is dedicated for customer electronics (entertainment and personal use), they are becoming also essential for companies and even for governments and states as they represent an important leverage for innovation and competitiveness.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Building Faithful Embedded Systems Models: Challenges and Opportunities

Nouri

Bozga

Bensalem

2016

Model-Implementation Fidelity in Cyber Physical System Design

View full text Add to dashboard Cite

In this paper, we overview some of the sought challenges for building faithful embedded systems models. We highlight the growing demand for using formal models especially for dealing with performance. The paper illustrates the impact of the hardware part of the system on performance and suggests a probabilistic interpretation in order to build appropriately abstract models towards trustworthy analysis. We believe that such a view is worth to investigate to faithfully characterize the system performance as it provides a formal and parsimonious framework. In this context, we survey some probabilistic models and techniques that we think interesting for building such faithful representations.

show abstract