Results 121 to 130 of about 343,438 (289)
Numerical and experimental analysis of time-dependent load transfer in reinforced concrete columns
Revista IBRACON de Estruturas e MateriaisA study was conducted to assess the influence of the steel reinforcement ratio in concrete columns on their properties of creep and shrinkage. Experimental tests and three-dimensional finite element-based simulations of the experimental curves from plain
L. T. Kataoka, T. N. Bittencourt
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Regression, Prediction and Shrinkage
Journal of the Royal Statistical Society Series B: Statistical Methodology, 1983 Summary The fit of a regression predictor to new data is nearly always worse than its fit to the original data. Anticipating this shrinkage leads to Stein-type predictors which, under certain assumptions, give a uniformly lower prediction mean squared error than least squares. Shrinkage can be particularly marked when stepwise fitting is
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Prediction of drying shrinkage of Portland cement paste: influence of shrinkage mechanisms
, 1991 Ultimate drying shrinkage of paste was investigated in terms of the Gibbs-Bangham shrinkage and the capillary stress mechanisms. Shrinkage measurements and nitrogen sorption isotherms were obtained on cement pastes of water-to-cement (W/C) ratios of 0.4 ...
Almudaiheem, Jamal A.
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Covalent Functionalization of 2D Semiconductors: A Roadmap to Advanced Electronic Devices
Advanced Functional Materials, EarlyView.This Review presents recent advances in the covalent functionalization strategies for two‐dimensional semiconductors and their implementation in modern technologies. Layered materials are modified through diverse molecular chemistries (e.g., thiols, diazonium salts, alkyl halides, and electron‐deficient species) to tailor their surface properties ...
Ramiro Quirós‐Ovies +2 more
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A Class of Shrinkage Estimators
Journal of the Royal Statistical Society Series B: Statistical Methodology, 1978 Summary In this paper we define a class of shrinkage estimators, all of whose members have a mean square error matrix which is less than that of the ordinary least squares estimator by a positive semidefinite matrix if (β-b *)T X T X (β-b *) ≤ σ2.
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Advanced Functional Materials, EarlyView.This work reveals the UV‐curing‐induced monomer‐rich domain, oligomer‐rich domain, and entangled oligomer domain. The cured submicron films in stressed state induce interlayer nano‐wrinkle structures during the deposition of the second layer. Stress‐free cured films in relaxed state form non‐diffusive, diffusive and semi‐diffusive interlayer ...
Shouzheng Chen +13 more
wiley +1 more source
Maderas: Ciencia y Tecnología, 2008 Entre las especies del género Acacias, la Acacia melanoxylon o aromo australiano y la Acacia dealbata o aromo chileno, son dos especies aclimatadas en Chile con un interesante potencial industrial.
Rubén A ANANIAS +3 more
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Autogenous and drying shrinkage of alkali‐activated slag mortars
, 2019 Shrinkage of alkali‐activated slag (AAS) cement is a critical issue for its industrial application. This study investigated the mechanisms and effectiveness of shrinkage‐reducing agent (SRA) and magnesia expansive agent on reducing autogenous and drying ...
Zhang, Zuhua +7 more
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A New Bioactive Glass‐Based Hybrid Bioink With Enhanced Cell Viability and Antibacterial Properties
Advanced Healthcare Materials, EarlyView.Graphical illustration of the production and characterization process, demonstrating the multiple functions of the new hybrid gelatin methacryloyl‐silver‐bioactive glass (GAB) material. Created in https://BioRender.com. ABSTRACT Recent advances in three‐dimensional bioprinting (3DBP) technology enable the production of customized bone substitutes ...
Adam C. Marsh +14 more
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Revista Colombiana de Estadística, 2011 Accurate measures of the volatility matrix and its inverse play a central role in risk and portfolio management problems. Due to the accumulation of errors in the estimation of expected returns and covariance matrix, the solution to these problems is ...
SANTIAGO GALLÓN, KAROLL GÓMEZ
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