Results 21 to 30 of about 490,956 (310)

Accuracy assessment for high-dimensional linear regression [PDF]

The Annals of Statistics, 2018
This paper considers point and interval estimation of the $\ell_q$ loss of an estimator in high-dimensional linear regression with random design. We establish the minimax rate for estimating the $\ell_{q}$ loss and the minimax expected length of confidence intervals for the $\ell_{q}$ loss of rate-optimal estimators of the regression vector, including ...
Cai, Tony, Guo, Zijian
openaire   +4 more sources

Experimental Analysis of the Effect of Compressive Force Resulting from the Initial Distance on the Improvement of Dimensional Accuracy Using Fluorinated Ethylene Propylene Membranes with Different Thicknesses in Digital Light Processing Method [PDF]

مکانیک هوافضا, 2023
The additive manufacturing method, as the newest way of producing parts in medicinal and industrial fields, has made significant advancements in recent years.
Mohammad Salehi, Jamal Zamani Ashani, Siavash Moayedi Manizani   +2 more
doaj  

Springback compensation of symmetrical and quasi-symmetrical sheet metal car body parts [PDF]

MATEC Web of Conferences
Springback compensation for symmetrical and quasi-symmetrical sheet metal parts presents specific challenges. The common approach involves modifying forming tools in the opposite direction of the springback to achieve dimensional accuracy.
Birkert Arndt, Kellenbenz Nico, Zimmermann Philipp, Lepple Felix   +3 more
doaj   +1 more source

Modeling the two-dimensional accuracy of soccer kicks [PDF]

Journal of Biomechanics, 2018
In many sports, athletes perform motor tasks that simultaneously require both speed and accuracy for success, such as kicking a ball. Because of the biomechanical trade-off between speed and accuracy, athletes must balance these competing demands. Modelling the optimal compromise between speed and accuracy requires one to quantifyhow task speed affects
Hunter, Andrew H., Angilletta, Michael J., Pavlic, Theodore, Lichtwark, Glen, Wilson, Robbie S.   +4 more
openaire   +4 more sources

Evaluation of geometrical benchmark artifacts containing multiple overhang lengths fabricated using material extrusion technique

Journal of Mechanical Engineering and Sciences, 2020
Fused deposition modelling (FDM) is a process of joining materials based on material entrusion technique to produce objects from 3D model using layer-by-layer technique as opposed to subtractive manufacturing.
Siti Nur Humaira Mazlan, Aini Zuhra Abdul Kadir, N. H. A. Ngadiman, M.R. Alkahari   +3 more
doaj   +1 more source

Comparative Study about Dimensional Accuracy and Surface Finish of Constant-Breadth Cams Manufactured by FFF and CNC Milling

Micromachines, 2023
In this work, the design, manufacture and measurement process of constant-breadth cams is presented. The motion law of the cam was designed by means of Bézier curves and the corresponding design desmodromic constraints.
Enrique E. Zayas-Figueras, Irene Buj-Corral   +1 more
doaj   +1 more source

An Experimental Investigation about the Dimensional Accuracy and the Porosity of Copper-Filled PLA Fused Filament Fabrication Parts

Metals, 2023
In recent years, metal-filled plastic filaments have begun to be used in fused filament fabrication (FFF) technology. However, the characterization of the parts obtained is still under development.
Irene Buj-Corral, Maurici Sivatte-Adroer
doaj   +1 more source

Investigations on Factors Affecting 3D-Printed Holes Dimensional Accuracy and Repeatability

Applied Sciences, 2022
This paper investigates the impact of several factors related to manufacturing, design, and post-processing on the dimensional accuracy of holes built in the additively manufactured parts obtained by material extrusion process (MEX).
Diana Popescu, Cătălin Gheorghe Amza, Rodica Marinescu, Mariana Cristiana Iacob, Nicoleta Luminiţa Căruţaşu   +4 more
doaj   +1 more source

Accuracy of 3D Printed Model Acquired from Different Types of Intra Oral Scanners and 3D Printers

Journal of Pharmacy and Bioallied Sciences
ObjectiveThe aim of this study was to verify the influence of different types of intraoral scanners and 3D printers on the accuracy of printed models in comparison to plaster models obtained from conventional impressions.
Niras Soniya, Chokhani Dishita, Jadhao Tanvi A, Bandgar Shreyas T, Bayaskar Surbhi G   +4 more
doaj   +1 more source

Dimensionality Reduction Methods: The Comparison Of Speed And Accuracy

Information Technology and Control, 2018
This research focuses on big data visualization that is based on dimensionality reduction methods. We propose a multi-level method for data clustering and visualization. Whole data mining process is divided into separate steps. For each step particular dimensionality reduction and visualization method is applied considering to data volume and type ...
Jelena Zubova, Olga Kurasova, Marius Liutvinavicius   +2 more
openaire   +2 more sources