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An Empirical Model of Slope Ratio Comparisons

Justin Talbot, John Gerth, Pat Hanrahan
2012 IEEE Transactions on Visualization and Computer Graphics  
s experimental design, we develop an empirical model of slope ratio estimation that fits more extreme slope ratio judgments and two common slope ratio estimation strategies.  ...  We conclude with an application of our model to aspect ratio selection.  ...  Based on insights gained from a series of pilot studies (Section 4), we develop an empirical model of human slope ratio judgments (Section 5). 2.  ... 
doi:10.1109/tvcg.2012.196 pmid:26357170 fatcat:e5tosjzaxvbd7oj2iywivbwjvq

Empirical corrections to snow creep pressure equations

1984 International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts  
Acknowledgement This note is a contribution from the Division of Building Research of the National Research Council of Canada and is published with the approval of the Director of the Division.  ...  This was attributed to the two-dimensional character of the problem and an ad hoc empirical correction was proposed to improve the model prediction.  ...  Figure 3 3 depicts the ratio 6lpgH as a function of D/H for $ = 45" and v = 0.25. In this figure the onedimensional model without empirical correction is not V FIG. 1.  ... 
doi:10.1016/0148-9062(84)90789-7 fatcat:3ci2wldimnb55nbwqicgaknepi

Estimating sediment delivery ratio by stream slope and relief ratio

Kieu Anh Nguyen, Walter Chen, C. Hamontree
2018 MATEC Web of Conferences  
Because steep terrain is a characteristic feature of the study area, two SDR models that depend on the slope of the mainstream channel and the relief-length ratio of the watershed are chosen.  ...  It is found that the Maner (1958) model, which uses the relief-length ratio, is the better model of the two.  ...  In order to clarify this problem, we further compare the two models in this study. Research method The two empirical models are described below.  ... 
doi:10.1051/matecconf/201819202040 fatcat:tstdsiajnfgm7gdunszvjo3o6e

Empirically Derived Biplane Lift as a Function of Gap and Stagger

Hantae Kang, Nicola Genco, Aaron Altman
2013 Journal of Aircraft  
This model has a gap of 0.84c, an averaged stagger of (—) 0.6c, and no décalage. The aspect ratio was 2.63 for the model seen in the figure.  ...  As the models were sidewall (floor) mounted they have an effective aspect ratio twice their geometric aspect ratio.  ... 
doi:10.2514/1.c031111 fatcat:7huyshgfjbhgbluat6sqtvgclu

Ratio effect slope can sometimes be an appropriate metric of the approximate number system sensitivity

Attila Krajcsi
2020 Attention, Perception & Psychophysics  
Detailed recommendations and a publicly available script help the researchers to plan or evaluate the use of the ratio effect slope as an ANS sensitivity index.  ...  The present work extends her findings by demonstrating that mathematically the usability of the ratio effect slope depends on the Weber fraction range of the sample and the ratios of the numbers in the  ...  To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.  ... 
doi:10.3758/s13414-019-01939-6 pmid:31933171 fatcat:pu56bxxe2bfidlt46z5jodgbmy

Page 366 of Astronomy and Astrophysics Vol. 224, Issue 1 [page]

1989 Astronomy and Astrophysics  
This line ratio is also sensitive to the slope of the mass function for an upper mass limit of 100 Mo.  ...  A comparison between model calcu- lations and empirical data for blue compact galaxies and HIlI-regions in external galaxies, using the emission line ratio [OIIT]A5007/HZ and the equivalent width of HG  ... 

Investigation of the Scruton Number Effects of Wind-Induced Unsteady Galloping Responses of Bridge Suspenders

Shuai Zhou, Yunfeng Zou, Xugang Hua, Fanrong Xue, Xuandong Lu, Arturo Garcia-Perez
2021 Shock and Vibration  
For a set of rectangular section member models with a width-to-height ratio of 1.2, by adjusting the equivalent stiffness, equivalent mass, and damping ratio of the model system and performing comparative  ...  The empirical formula for estimating the "unsteady galloping" response amplitude is modified and can be used to predict the amplitude within the design wind speed range of similar engineering members.  ...  A numerical study and regression analysis were then carried out, and an empirical formula for amplitude estimation was presented. e research shows that the slope of the key parameters of the empirical  ... 
doi:10.1155/2021/5514719 fatcat:toa36ahabnee5janzbkzopccvm

NUMERICAL MODELLING OF BREAKER DEPTH INDEX

Felice D'Alessandro, Giuseppe Tomasicchio, Giancarlo Chiaia, Francesco Ciardulli, Antonio Francone
2017 Coastal Engineering Proceedings  
The model suitability in predicting γb has been verified against physical data from an experimental investigation conducted with incident regular waves propagating along uniform 1:20 and 1:50 slope beaches  ...  (G.V. dos Reis, 1992), and estimates of γb from five existing empirical formulae (Battjes, 1974; Ostendorf and Madsen, 1979; Singamsetti and Wind, 1980; Smith and Kraus, 1990; Goda, 2010).  ...  Figure 1 . 1 The ratio γb = Hb/hb as a function of the deep water wave steepness, H0/L0. Comparison among observations, BCI criterion and empirical formulae. Slope 1:20.  ... 
doi:10.9753/icce.v35.waves.29 fatcat:j6x2uuty6jgczifu56dqsyurz4

Combination of empirically-based and physically-based methods to assess shallow slides susceptibility at the basin scale

Sérgio C. Oliveira, José L. Zêzere, Sara Lajas, Raquel Melo
2016 NHESSD  
Moreover the combination of the two models allowed the identification of areas where the results of the Information Value and the Infinite Slope methods are contradictory.  ...  The results demonstrate a higher predictive capacity of the new shallow slides susceptibility map, which combines the independent results obtained with empirically-based and physically-based models.  ...  as an error of the IS model.  ... 
doi:10.5194/nhess-2016-381 fatcat:yedolq2cfncixcdqszxtg6uyca

WAVE RUNUP ON DIKES AND BEACHES

Jill Pietropaolo, Nobuhisa Kobayashi, Jeffry A. Melby
2012 Coastal Engineering Proceedings  
CSHORE is tested against 40 wave runup tests on an impermeable dike on a barred beach, 97 wave runup tests on an impermeable dike with a gently sloping beach, and 120 tests for wave runup on gentle uniform  ...  slopes.  ...  As shown with the comparison to van Gent's data, CSHORE is versatile enough to predict wave runup on the slope of an arbitrary geometry.  ... 
doi:10.9753/icce.v33.currents.19 fatcat:q4oight7pjb6liquvp3mlw6we4

Shear Strength Prediction for Two-Piles Caps Using Empirical Equations

Riyadh J. Aziz, Ihsan A, Saib, Safaa D. Abdul-Hameed
2016 مجلة النهرين للعلوم الهندسية  
The analysis of pile caps using these equations indicate that the proposed equations results in good agreement when compared with the results of the available equations.  ...  The proposed expressions have minimum values of mean absolute error (MAE) and root mean square error (RMSE), while they have maximum values for coefficient of multiple determinations (R2).  ...  Comparison between Experimental V u and Empirical-V n Results 8) show that the empirical equations of ACI 318M-99 [6] and ACI 318M-11 [10] Building Code are not the appropriate models to accurately predict  ... 
doaj:78852e20ef444fc38f9ecd3db9c1bfec fatcat:shao3ohesze6hk2iktiubq6lne

Page 37 of Astronomy and Astrophysics Vol. 321, Issue 1 [page]

1997 Astronomy and Astrophysics  
The model with an upper mass limit of 120 Mq is given for comparison (solid curves). Fig. 7d presents a model with an upper mass limit of 30 \/2.  ...  The model with an upper mass limit of 120 M- is presented for comparison (solid curves). Fig. 7c presents a model with an upper mass limit of 60 \/.  ... 

Constraints on Galaxy Formation from the Tully-Fisher Relation [article]

Frank C. van den Bosch
1999 arXiv   pre-print
Once the parameters that describe the supernova feedback are tuned to fit the slope of the observed TF relation, the model reproduces the correct amount of TF scatter, and yields gas mass fractions, mass-to-light  ...  I discuss the contraints on galaxy formation that follow from fitting the model to the near-infrared Tully-Fisher (TF) relation, with an emphasis on reproducing the small amount of scatter observed.  ...  After tuning the feedback parameters to fit the slope of the empirical K-band TFR, the model The enclosed mass-to-light ratio M tot /M lum as function of radius R (left), orbital frequency ω (middle) and  ... 
arXiv:astro-ph/9909501v1 fatcat:rptnygzpknghhiykmuh56wwefe

Page 92 of The Journal of Business Vol. 62, Issue 1 [page]

1989 The Journal of Business  
If an increase in tax-exempt/taxable yield ratios leads to lower prices for long-term policies, an empirical estimate of the slope y in (3) should be positive: 1 & U -1l= ND + or, + Wes em- (3) In (3),  ...  It could be evidence of model misspecification.  ... 

Empirical investigation of friction weakening of terrestrial and Martian landslides using discrete element models

Timur Borykov, Daniel Mège, Anne Mangeney, Patrick Richard, Joanna Gurgurewicz, Antoine Lucas
2019 Landslides. Journal of the International Consortium on Landslides  
volume and aspect ratio on runout distances.  ...  We investigate here as to whether similar empirical reduced friction should be put into discrete element models (DEM) to reproduce observed runout of large landslides on Earth and on Mars.  ...  Other parameters as inFig. 6 Fig. 8 8 Comparison between the experimental and numerical thickness profiles during the spreading of an initially rectangular granular mass over an inclined rigid bed (θ  ... 
doi:10.1007/s10346-019-01140-8 pmid:31178675 pmcid:PMC6529039 fatcat:hzbwkiua7bfttpiiyc4zog5sim
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