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Shrinkage

About: Shrinkage is a(n) research topic. Over the lifetime, 21245 publication(s) have been published within this topic receiving 304269 citation(s).

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Papers
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Open accessBook
01 Dec 1968-
Abstract: 1. Portland Cement. 2. Cementitious Materials Of Different Types. 3. Properties Of Aggregate. 4. Fresh Concrete. 5. Admixtures. 6. Strength Of Concrete. 7. Further Aspects Of Hardened Concrete. 8. Temperature Effects In Concrete. 9. Elasticity, Shrinkage And Creep. 10. Durabilty Of Concrete. 11. Effects Of Freezing And Thawing And Of Chlorides. 12. Testing Of Hardened Concrete. 13. Concretes With Particular Properties. 14. Selection Of Concrete Mix Proportions (Mix Design). Appendices. Index.

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Topics: Properties of concrete (75%), Polymer concrete (72%), Aggregate (composite) (59%) ...read more

5,706 Citations


Journal ArticleDOI: 10.1111/J.1151-2916.1990.TB05082.X
George W. Scherer1Institutions (1)
Abstract: This review examines the stages of drying, with the emphasis on the constant rate period (CRP), when the pores are full of liquid. It is during the CRP that most of the shrinkage occurs and the drying stresses rise to a maximum. We examine the forces that produce shrinkage and the mechanisms responsible for transport of liquid. By analyzing the interplay of fluid flow and shrinkage of the solid network, it is possible to calculate the pressure distribution in the liquid in the pores. The tension in the liquid is found to be greatest near the drying surface, resulting in greater compressive stresses on the network in that region. This produces differential shrinkage of the solid, which is the cause of cracking during drying. The probability of fracture is related to the size of the body, the rate of evaporation, and the strength of the network. A variety of strategies for avoiding fracture during drying are discussed.

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Topics: Shrinkage (61%), Evaporation (50%)

913 Citations


Open accessBook
01 Jan 1964-
Topics: Cellulose fiber (73%), Cellulose (66%), Lignin (56%) ...read more

909 Citations


Journal ArticleDOI: 10.1002/PATH.1711050103
J. F. R. Kerr1Institutions (1)
Topics: Shrinkage (51%)

849 Citations


Open accessJournal ArticleDOI: 10.1109/83.661182
Abstract: This paper examines the relationship between wavelet-based image processing algorithms and variational problems. Algorithms are derived as exact or approximate minimizers of variational problems; in particular, we show that wavelet shrinkage can be considered the exact minimizer of the following problem. Given an image F defined on a square I, minimize over all g in the Besov space B11(L1(I)) the functional |F-g|L2(I)2+λ|g|(B11(L1(I))). We use the theory of nonlinear wavelet image compression in L2(I) to derive accurate error bounds for noise removal through wavelet shrinkage applied to images corrupted with i.i.d., mean zero, Gaussian noise. A new signal-to-noise ratio (SNR), which we claim more accurately reflects the visual perception of noise in images, arises in this derivation. We present extensive computations that support the hypothesis that near-optimal shrinkage parameters can be derived if one knows (or can estimate) only two parameters about an image F: the largest α for which F∈Bqα(Lq(I)),1/q=α/2+1/2, and the norm |F|Bqα(Lq(I)). Both theoretical and experimental results indicate that our choice of shrinkage parameters yields uniformly better results than Donoho and Johnstone's VisuShrink procedure; an example suggests, however, that Donoho and Johnstone's (1994, 1995, 1996) SureShrink method, which uses a different shrinkage parameter for each dyadic level, achieves a lower error than our procedure.

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Topics: Wavelet transform (58%), Wavelet (58%), Gaussian noise (56%) ...read more

772 Citations


Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202245
2021813
2020939
20191,032
2018961
2017922

Top Attributes

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Topic's top 5 most impactful authors

Zdeněk P. Bažant

34 papers, 2.1K citations

Ahmed Loukili

32 papers, 1.1K citations

Pietro Lura

27 papers, 1.8K citations

Ippei Maruyama

25 papers, 411 citations

Jason Weiss

20 papers, 781 citations

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