scholarly journals Statistical characterization of a confined submarine fan system: The Pennsylvanian Lower Atoka Formation, Ouachita Mountains, USA

Sedimentology ◽  
2021 ◽  
Author(s):  
Pengfei Hou ◽  
Zane R. Jobe ◽  
Lesli J. Wood
Keyword(s):  
Ouachita Mountains ◽  
Submarine Fan ◽  
Statistical Characterization

scholarly journals Statistical Characterization of a Confined Submarine Fan System: the Pennsylvanian Lower Atoka Formation, Ouachita Mountains, USA

2020 ◽  
Author(s):  
Pengfei Hou ◽  
Zane Richards Jobe ◽  
Leslie Wood
Keyword(s):  
Time Series ◽  
Markov Chains ◽  
Statistical Methods ◽  
Distribution Analysis ◽  
Ouachita Mountains ◽  
Submarine Fan ◽  
Statistical Characterization ◽  
Rescaled Range Analysis ◽  
Bed Thickness ◽  
Hurst Statistics

Our knowledge of submarine fan deposits has historically relied heavily on qualitative field and subsurface observations and interpretations, but recent studies using statistical analyses have enhanced the understanding of submarine fan sub-environments, including the degree of confinement, stratigraphic patterns, and potential control factors. The purpose of this study is to improve the quantitative understanding of synorogenic submarine fan deposition at foreland basin settings with a statistical approach. A suite of statistical methods is integrated and developed (Hurst Statistics/ rescaled range analysis, bed thickness frequency distribution analysis, Markov Chains, and time-series analysis), and applied to the well understood Pennsylvanian lower Atoka submarine fan system in the Ouachita Mountains, United States for this purpose. The results of the Hurst Statistics and bed thickness analyses corroborate qualitative interpretations that (1) the lower Atoka is lobe-dominated, and (2) the southeastern (wedge-top) portion of the system is more strongly confined than the northern (foredeep) portion. The Markov Chains and time-series analyses reveal the prevalence (56%) of stratigraphic orderliness and cyclicity; these results are used to discuss potential intrinsic and extrinsic controls on the turbidite sandstone recurrence cycles, which are otherwise difficult to distinguish qualitatively. The results of this study demonstrate that these integrated statistical methods can be utilized to quantify uncertainty in depositional interpretations of outcrops with limited exposures or 1D subsurface (e.g., well-log, core) datasets.

scholarly journals Critical Review of EMC Standards for the Measurement of Radiated Electromagnetic Emissions from Transit Line and Rolling Stock

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 759
Author(s):  
Andrea Mariscotti
Keyword(s):  
Time Distribution ◽  
Communication Systems ◽  
Electromagnetic Compatibility ◽  
Transportation Systems ◽  
Operating Conditions ◽  
Rolling Stock ◽  
Intrinsic Variability ◽  
Statistical Characterization ◽  
Electromagnetic Emissions

Accurate and comprehensive methods for the assessment of radiated electromagnetic emissions in modern electric transportation systems are a necessity. The characteristics and susceptibility of modern victim signaling and communication radio services, operating within and outside the right-of-way, require an update of the measurement methods integrating or replacing the swept frequency technique with time domain approaches. Applicable standards are the EN 50121 (equivalent to the IEC 62236) and Urban Mass Transport Association (UMTA) with additional specifications from project contracts. This work discusses the standardized methods and settings, and the representative operating conditions, highlighting areas where improvements are possible and opportune (statistical characterization of measurement results, identification and distinction of emissions and line resonances, and narrowband and broadband phenomena). In particular for the Electromagnetic Compatibility (EMC) assessment with new Digital Communication Systems, the characterization of time distribution of spectral properties is discussed, e.g., by means of Amplitude Probability Distribution and including time distribution information. The problem of determination of site and setup uncertainty and repeatability is also discussed, observing on one hand the lack of clear indications in standards and, on the other hand, the non-ideality and intrinsic variability of measurement conditions (e.g., rolling stock operating conditions, synchronization issues, and electric arc intermittence).

Statistical characterization of the signal-in-space errors of the BDS: a comparison between BDS-2 and BDS-3

GPS Solutions ◽  
2021 ◽  
Vol 25 (3) ◽  
Author(s):  
Guo Chen ◽  
Renyu Zhou ◽  
Zhigang Hu ◽  
Yifei Lv ◽  
Na Wei ◽  
...  
Keyword(s):  
Statistical Characterization

Statistical characterization of engineered tissues using confocal mosaic technology

2010 ◽  
Author(s):  
David Levitz ◽  
Ardalan Ardeshiri ◽  
Jabeer Ahmed ◽  
Daniel S. Gareau ◽  
Steven L. Jacques
Keyword(s):  
Statistical Characterization ◽  
Engineered Tissues
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