Results 31 to 40 of about 3,894,475 (297)

Fuel Grain Configuration Adaptation for High-Regression-Rate Hybrid Propulsion Applications

open access: yesAerospace
Low regression rate is the most critical issue for the development and application of hybrid rocket motors (HRMs). Paraffin-based fuels are potential candidates for HRMs due to their high regression rates but adding polymers to improve strength results ...
Lin-Lin Liu   +3 more
doaj   +1 more source

Small-Scale Static Fire Tests of 3D Printing Hybrid Rocket Fuel Grains Produced from Different Materials

open access: yesAerospace, 2019
The last decade has seen an almost exponential increase in the number of rocket launches for sounding missions or for delivering payloads into low Earth orbits.
Mitchell McFarland, Elsa Antunes
doaj   +1 more source

Crack Growth Rate Model Derived from Domain Knowledge-Guided Symbolic Regression

open access: yesChinese Journal of Mechanical Engineering, 2023
Machine learning (ML) has powerful nonlinear processing and multivariate learning capabilities, so it has been widely utilised in the fatigue field. However, most ML methods are inexplicable black-box models that are difficult to apply in engineering ...
Shuwei Zhou   +4 more
doaj   +1 more source

Adaptive goodness-of-fit tests based on signed ranks [PDF]

open access: yes, 2008
Within the nonparametric regression model with unknown regression function $l$ and independent, symmetric errors, a new multiscale signed rank statistic is introduced and a conditional multiple test of the simple hypothesis $l=0$ against a nonparametric ...
Rohde, Angelika
core   +4 more sources

Solid-Fuel Regression Rate for Standard-Flow Hybrid Rocket Motors

open access: yesJournal of Thermal Science and Technology, 2012
Marxman's diffusion-limited analysis of hybrid rocket combustion has been often used to investigate various combustion problems in hybrid rocket motors.
Takakazu MORITA   +3 more
doaj   +1 more source

Familywise Error Rate Control via Knockoffs [PDF]

open access: yes, 2015
We present a novel method for controlling the $k$-familywise error rate ($k$-FWER) in the linear regression setting using the knockoffs framework first introduced by Barber and Cand\`es.
Janson, Lucas, Su, Weijie
core   +3 more sources

A general asymptotic scheme for inference under order restrictions

open access: yes, 2006
Limit distributions for the greatest convex minorant and its derivative are considered for a general class of stochastic processes including partial sum processes and empirical processes, for independent, weakly dependent and long range dependent data ...
Anevski, D., Hössjer, O.
core   +1 more source

Robust nonparametric estimation via wavelet median regression [PDF]

open access: yes, 2008
In this paper we develop a nonparametric regression method that is simultaneously adaptive over a wide range of function classes for the regression function and robust over a large collection of error distributions, including those that are heavy-tailed,
Brown, Lawrence D.   +2 more
core   +3 more sources

Malaria parasite clearance rate regression: an R software package for a Bayesian hierarchical regression model

open access: yesMalaria Journal, 2019
Background Emerging resistance to anti-malarial drugs has led malaria researchers to investigate what covariates (parasite and host factors) are associated with resistance.
Saeed Sharifi-Malvajerdi   +7 more
doaj   +1 more source

Analyses of Developmental Rate Isomorphy in Ectotherms: Introducing the Dirichlet Regression. [PDF]

open access: yesPLoS ONE, 2015
Temperature drives development in insects and other ectotherms because their metabolic rate and growth depends directly on thermal conditions. However, relative durations of successive ontogenetic stages often remain nearly constant across a substantial ...
David S Boukal   +5 more
doaj   +1 more source

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