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1. Modeling power loss during blackouts in China using non-stationary generalized extreme value distribution

Author:
Chen, Haoling; Zhao, Tongtiegang
Source:
Energy 2020 v.195 pp. 117044
ISSN:
0360-5442
Subject:
statistical analysis,   etc   ; models; China;     Show all 3 Subjects
Abstract:
... Power loss during blackouts shows an increasing complexity with the increase in the size of power grids. Traditional statistical methods based on the assumption of stationarity can lead to inappropriate assessments of blackouts. This study builds on the generalized extreme value (GEV) distribution by introducing time as a covariate to account for possible non-stationarities. The location, scale, a ...
DOI:
10.1016/j.energy.2020.117044

2. f-SAEM: A fast stochastic approximation of the EM algorithm for nonlinear mixed effects models

Author:
Karimi, Belhal; Lavielle, Marc; Moulines, Eric
Source:
Computational statistics & data analysis 2020 v.141 pp. 123-138
ISSN:
0167-9473
Subject:
statistical analysis,   etc   ; algorithms; models;     Show all 3 Subjects
Abstract:
... The ability to generate samples of the random effects from their conditional distributions is fundamental for inference in mixed effects models. Random walk Metropolis is widely used to perform such sampling, but this method is known to converge slowly for medium dimensional problems, or when the joint structure of the distributions to sample is spatially heterogeneous. The main contribution consi ...
DOI:
10.1016/j.csda.2019.07.001

3. Multiplicative bias correction for asymmetric kernel density estimators revisited

Author:
Igarashi, Gaku; Kakizawa, Yoshihide
Source:
Computational statistics & data analysis 2020 v.141 pp. 40-61
ISSN:
0167-9473
Subject:
statistical analysis,   etc   ; data analysis; variance;     Show all 3 Subjects
Abstract:
... Multiplicative bias correction technique is revisited for asymmetric kernel density estimators (KDEs) when the data is nonnegative or bounded. It is crucial to classify the recently developed asymmetric KDEs into two types. The multiplicative bias correction applied to the non two-regime type is shown to effectively reduce the order of the bias, at the expense of a constant-factor inflation of the ...
DOI:
10.1016/j.csda.2019.06.010

4. Earthquake-related speleothem damages: observations from the 2008 Mw 7.9 Wenchuan, China

Author:
Zhao, Xue-qin; Wang, Fu-dong; Verheyden, Sophie; Liu-zeng, Jing; Zhang, Gang
Source:
Geomorphology 2020 v.358 pp. 107130
ISSN:
0169-555X
Subject:
statistical analysis,   etc   ; caves; earthquakes; gravity; China;     Show all 5 Subjects
Abstract:
... A speleoseismological study has been conducted at over a dozen cave sites along the Longmen Shan fault zone of the eastern Qinghai-Tibet Plateau. The aim was to assess the damage inflicted on speleothems by the Mw 7.9 Wenchuan earthquake. Results show that the earthquake led to either partial or complete collapse of the caves. ‘Soda straws’ are shown to be particularly vulnerable to earthquake dam ...
DOI:
10.1016/j.geomorph.2020.107130

5. Adaptive inference on pure spatial models

Author:
Lee, Jungyoon; Robinson, Peter M.
Source:
Journal of econometrics 2020 v.216 no.2 pp. 375-393
ISSN:
0304-4076
Subject:
statistical analysis,   etc   ; econometric models; economic analysis; multipliers;     Show all 4 Subjects
Abstract:
... In a general class of semiparametric pure spatial models (having no explanatory variables) allowing nonlinearity in the parameter and the weight matrix, we propose adaptive tests and estimates which are asymptotically efficient in the presence of unknown, nonparametric distributional form. Feasibility of adaptive estimation is verified and its efficiency improvement over Gaussian pseudo maximum li ...
DOI:
10.1016/j.jeconom.2019.10.006

6. Bootstrap interval with application in environmental monitoring

Author:
da Silva, Cleomacio Miguel; Araújo Ribeiro, Fernando Carlos; Vieira, José Wilson; da Silva Filho, Crescêncio Andrade
Source:
TheInternational journal of environmental studies 2020 v.77 no.2 pp. 335-348
ISSN:
1029-0400
Subject:
statistical analysis,   etc   ; environmental monitoring; radionuclides; radium;     Show all 4 Subjects
Abstract:
... Environmental research data usually present high variability because of the presence of outlier values. This study sought to apply the interval bootstrap method, as compared to Chebyshev’s Theorem, for the statistical assessment of environmental data with anomalous values. The results obtained showed that: (a) the bootstrap method is an excellent alternative in the assessment of environmental data ...
DOI:
10.1080/00207233.2019.1630108

7. Determining the Number of Effective Parameters in Kernel Density Estimation

Author:
McCloud, Nadine; Parmeter, Christopher F.
Source:
Computational statistics & data analysis 2020 v.143 pp. 106843
ISSN:
0167-9473
Subject:
statistical analysis,   etc   ; econometric models; probabilistic models;     Show all 3 Subjects
Abstract:
... The hat matrix maps the vector of response values in a regression to its predicted counterpart. The trace of this hat matrix is the workhorse for calculating the effective number of parameters in both parametric and nonparametric regression settings. Drawing on the regression literature, the standard kernel density estimate is transformed to mimic a regression estimate thus allowing extraction of ...
DOI:
10.1016/j.csda.2019.106843

8. Transition analysis applied to third molar development in a Danish population

Author:
Arge, Sara; Wenzel, Ann; Holmstrup, Palle; Jensen, Niels D.; Lynnerup, Niels; Boldsen, Jesper L.
Source:
Forensic science international 2020 v.308 pp. 110145
ISSN:
0379-0738
Subject:
statistical analysis,   etc   ; age determination; linear models; radiography;     Show all 4 Subjects
Abstract:
... Age assessment based on dental development is often requested in order to assess whether an individual is older or younger than 18 years of age. There are several statistical approaches to estimate age based upon third molar development. The aim of this study was to apply the principles of transition analysis (TA) to a Danish reference material and to evaluate whether it was indicated to include a ...
DOI:
10.1016/j.forsciint.2020.110145

9. A novel adaptive fast IHS transform fusion method driven by regional spectral characteristics for Gaofen-2 imagery

Author:
Luo, Shuyue; Zhou, Shangbo; Qiang, Baohua
Source:
International journal of remote sensing 2020 v.41 no.4 pp. 1321-1337
ISSN:
1366-5901
Subject:
statistical analysis,   etc   ; algorithms; multispectral imagery; remote sensing;     Show all 4 Subjects
Abstract:
... With the increasing diversity of applications based on the Gaofen-2 satellite imagery, broadly applicable methods to generate high quality fused images is a significant problem to investigate. To obtain an image with high spatial and spectral resolutions from given panchromatic (Pan) images and multispectral (MS) images, most existing fusion algorithms adopt a unified strategy for the whole image. ...
DOI:
10.1080/01431161.2019.1666315

10. A multi-scale method for forecasting oil price with multi-factor search engine data

Author:
Tang, Ling; Zhang, Chengyuan; Li, Ling; Wang, Shouyang
Source:
Applied energy 2020 v.257 pp. 114033
ISSN:
0306-2619
Subject:
statistical analysis,   etc   ; energy; models; oils; prediction; prices;     Show all 6 Subjects
Abstract:
... With the boom in big data, a promising idea for using search engine data has emerged and improved international oil price prediction, a hot topic in the fields of energy system modelling and analysis. Since different search engine data drive the oil price in different ways at different timescales, a multi-scale forecasting methodology is proposed that carefully explores the multi-scale relationshi ...
DOI:
10.1016/j.apenergy.2019.114033

11. Comparison of the behavior of the precipitation concentration index on global and local scale

Author:
Núñez-González, Gerardo
Source:
Theoretical and applied climatology 2020 v.139 no.1-2 pp. 631-638
ISSN:
0177-798X
Subject:
statistical analysis,   etc   ; model validation; rain; statistical models;     Show all 4 Subjects
Abstract:
... The concentration index (CI) has been widely used in recent years to analyze the statistical structure of daily precipitation. This index was proposed by Martin-Vide Int J Climatol 24:959–971 (2004) to explore the contribution of the days of the greatest rainfall to the total amount. However, sometimes, the interpretation of the concentration index could be confusing because depending on the resea ...
DOI:
10.1007/s00704-019-02996-5

12. A coupled component DCS-EGARCH model for intraday and overnight volatility

Author:
Linton, Oliver; Wu, Jianbin
Source:
Journal of econometrics 2020 v.217 no.1 pp. 176-201
ISSN:
0304-4076
Subject:
statistical analysis,   etc   ; databases; econometric models; economic analysis; economic theory;     Show all 5 Subjects
Abstract:
... We propose a semi-parametric coupled component exponential GARCH model for intraday and overnight returns that allows the two series to have different dynamical properties. We adopt a dynamic conditional score model with t-distributed innovations that captures the very heavy tails of overnight returns. We propose a several-step estimation procedure that captures the nonparametric slowly moving com ...
DOI:
10.1016/j.jeconom.2019.12.015

13. Self-regenerating tubing bioreactor for removal of toxic substrates: Operational strategies in response to severe dynamic loading conditions

Author:
Tomei, M. Concetta; Mosca Angelucci, Domenica; Daugulis, Andrew J.
Source:
The Science of the total environment 2020 v.723 pp. 138019
ISSN:
0048-9697
Subject:
statistical analysis,   etc   ; 2,4-dichlorophenol; bioreactors; polymers; toxicity; wastewater;     Show all 6 Subjects
Abstract:
... A tubing TPPB (Two-Phase Partitioning Bioreactor) was operated with the objective of verifying the effective treatment of a phenolic synthetic wastewater with simultaneous polymeric tubing bioregeneration by introducing tubing effluent recycle and modifications to the Hydraulic Retention Time (HRT). 2,4-dichlorophenol (DCP) was employed as the target substrate and the bioreactor was operated for a ...
DOI:
10.1016/j.scitotenv.2020.138019

14. Applicability of chemical indices to characterize weathering degrees in decomposed volcanic rocks

Author:
Okewale, Ismail Adeniyi
Source:
Catena 2020 v.189 pp. 104475
ISSN:
0341-8162
Subject:
statistical analysis,   etc   ; cations; leaching; oxides; volcanic rocks; water content; weathering;     Show all 7 Subjects
Abstract:
... Among the useful tools in characterizing weathering degrees are chemical indices, which combines bulk major elemental oxides into a single metric value and commonly presented along a vertical profile. However, characterizing geomaterials of diverse nature using chemical indices may be problematic. In this study, chemical indices were evaluated to characterize weathering degrees in decomposed volca ...
DOI:
10.1016/j.catena.2020.104475

15. Bubble regime identification in an attention-based model for Bitcoin and Ethereum price dynamics

Author:
Cretarola, Alessandra; Figà-Talamanca, Gianna
Source:
Economics letters 2020 v.191 pp. 108831
ISSN:
0165-1765
Subject:
statistical analysis,   etc   ; Markov chain; assets; markets; models; operations research; prices;     Show all 7 Subjects
Abstract:
... In this paper we extend the model in Cretarola, Figà-Talamanca, “Detecting bubbles in Bitcoin price dynamics via market exuberance”, Annals of Operations Research (2019), by allowing for a state-dependent correlation parameter between asset returns and market attention. We assume that the change of state is described by a continuous time latent Markov chain and we propose an estimation procedure b ...
DOI:
10.1016/j.econlet.2019.108831

16. A technical perspective on variability costs: Dependence on power variability and cross-correlations

Author:
Roy, Sanjoy
Source:
Energy 2020 v.198 pp. 117350
ISSN:
0360-5442
Subject:
statistical analysis,   etc   ; electricity; electricity generation; energy costs; markets;     Show all 5 Subjects
Abstract:
... With power from integrated vRES added to electricity generated by conventional sources across a commitment interval, unexpected real-time changes in demand and generation may contribute substantial overheads to the optimal cost of energy (CoE). This paper presents analytical formulations and illustrative examples to focus on a significant fraction of the cost overheads, commonly referred to as var ...
DOI:
10.1016/j.energy.2020.117350

17. Methodology of advanced data validation and reconciliation application in industrial thermal processes

Author:
Szega, Marcin
Source:
Energy 2020 v.198 pp. 117326
ISSN:
0360-5442
Subject:
statistical analysis,   etc   ; business enterprises; computers; equations; guidelines; industry;     Show all 6 Subjects
Abstract:
... Data validation and reconciliation is a technique that uses process information and mathematical methods in order to correct measurements in thermal industrial processes. On the need to measurements data validation and reconciliation (DVR) in order to use them for further calculations is indicated in the Association of German Engineers guidelines – VDI 2048. Moreover, the necessity of removing mea ...
DOI:
10.1016/j.energy.2020.117326

18. Grid nano-indentation as full-field measurements

Author:
Gaillard, Y.; Amiot, F.
Source:
Composites 2020 v.132 pp. 105807
ISSN:
1359-835X
Subject:
statistical analysis,   etc   ; composite materials; mechanical properties; polymers; topology;     Show all 5 Subjects
Abstract:
... The use of grid nano-indentation as a full-field measurement tool to investigate the properties of heterogeneous materials is described. Contrarily to the reported approaches which rely on statistical analysis, the mechanical properties fields are analyzed herein relying on a topological description of the sample. The spatial convolution function is approached using Hertz contact theory, and the o ...
DOI:
10.1016/j.compositesa.2020.105807

19. The bias of the maximum likelihood estimates of flood quantiles based solely on the largest historical records

Author:
Kochanek, Krzysztof; Strupczewski, Witold G.; Bogdanowicz, Ewa; Markiewicz, Iwona
Source:
Journal of hydrology 2020 v.584 pp. 124740
ISSN:
0022-1694
Subject:
statistical analysis,   etc   ; case studies; floods; historical records; mathematical models;     Show all 5 Subjects
Abstract:
... The common practice to improve the assessments of design (upper) quantiles of annual flow maxima distribution is incorporating historical data into flood frequency estimates, which in general are greater than the systematic flood maxima records. A big body of literature was dedicated to this issue showing the advantages and constraints of this approach, but the research was not concentrated on the ...
DOI:
10.1016/j.jhydrol.2020.124740

20. Laser induced breakdown in gas mixtures. Experimental and statistical investigation on n-decane ignition: Pressure, mixture composition and equivalence ratio effects

Author:
Mokrani, Nabil; Gillard, Philippe
Source:
Journal of hazardous materials 2020 v.388 pp. 119266
ISSN:
0304-3894
Subject:
statistical analysis,   etc   ; combustion; energy; fuels; nitrogen; oxygen; stoichiometry;     Show all 7 Subjects
Abstract:
... This paper presents a physical and statistical approach to laser-induced breakdown in n-decane/N₂ + O₂ mixtures as a function of incident or absorbed energy. A parametric study, with pressure, fuel purity and equivalence ratio, was conducted to determine the incident and absorbed energies involved in producing breakdown, followed or not by ignition. The experiments were performed using a Q-switche ...
DOI:
10.1016/j.jhazmat.2018.03.046