Results 21 to 30 of about 87,758 (191)

Pure gravity and conical defects

open access: yesJournal of High Energy Physics, 2020
We revisit the spectrum of pure quantum gravity in AdS3. The computation of the torus partition function will — if computed using a gravitational path integral that includes only smooth saddle points — lead to a density of states which is not physically ...
Nathan Benjamin   +2 more
doaj   +1 more source

Characterization of the complete chloroplast genome of the Solanum tuberosum L. cv. Shepody (Solanaceae)

open access: yesMitochondrial DNA. Part B. Resources, 2021
Potato (Solanum tuberosum L.), a species of the family Solanaceae, is the fourth most important food crop worldwide. Solanum tuberosum L. cv. Shepody is a long, smooth, white-skinned potato cultivar with medium green leaves.
Shanshan Chen   +11 more
doaj   +1 more source

Autoregressive Wild Bootstrap Inference for Nonparametric Trends [PDF]

open access: yes, 2019
In this paper we propose an autoregressive wild bootstrap method to construct confidence bands around a smooth deterministic trend. The bootstrap method is easy to implement and does not require any adjustments in the presence of missing data, which ...
Friedrich, Marina   +2 more
core   +3 more sources

Bootstrapping Nonparametric Prediction Intervals for Conditional Value-at-Risk with Heteroscedasticity

open access: yesJournal of Probability and Statistics, 2019
Using bootstrap method, we have constructed nonparametric prediction intervals for Conditional Value-at-Risk for returns that admit a heteroscedastic location-scale model where the location and scale functions are smooth, and the function of the error ...
Emmanuel Torsen, Lema Logamou Seknewna
doaj   +1 more source

A priori estimates of global solutions of superlinear parabolic systems

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2016
We consider the parabolic system $ u_{t}-\Delta u = u^{r}v^{p}$, $v_{t}-\Delta v = u^{q}v^{s}$ in $\Omega\times(0,\infty)$, complemented by the homogeneous Dirichlet boundary conditions and the initial conditions $(u,v)(\cdot,0) = (u_{0},v_{0})$ in ...
Július Pačuta
doaj   +1 more source

Sample size calculation to externally validate scoring systems based on logistic regression models. [PDF]

open access: yesPLoS ONE, 2017
A sample size containing at least 100 events and 100 non-events has been suggested to validate a predictive model, regardless of the model being validated and that certain factors can influence calibration of the predictive model (discrimination ...
Antonio Palazón-Bru   +4 more
doaj   +1 more source

Establishment of a prediction model for the impact of endometrial thickness on the day of embryo transfer on ectopic pregnancy in frozen-thawed embryo transfer cycle

open access: yesFrontiers in Endocrinology, 2023
ObjectiveThis study aims to investigate the factors affecting the ectopic pregnancy (EP) rate in the frozen-thawed embryo transfer (FET) cycle.MethodsThis study retrospectively analyzed 5606 FET cycles, including 5496 cycles resulting in intrauterine ...
Qiuyuan Li   +10 more
doaj   +1 more source

The smoothed median and the bootstrap

open access: yesBiometrika, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Brown, B M, Hall, Peter, Young, G A
openaire   +4 more sources

Parrot: A Progressive Analysis System on Large Text Collections

open access: yesData Science and Engineering, 2020
The size of textual data continues to grow along with the need for timely and cost-effective analysis, while the growth of computation power cannot keep up with the growth of data.
Yazhong Zhang   +5 more
doaj   +1 more source

Subsampling inference in cube root asymptotics with an application to Manski's maximum score estimator [PDF]

open access: yes, 2000
Kim and Pollard (Annals of Statistics, 18 (1990) 191?219) showed that a general class of M-estimators converge at rate n1/3 rather than at the standard rate n1/2. Many times, this situation arises when the objective function is non-smooth.
Delgado, Miguel A.   +2 more
core   +8 more sources

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