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Relevant bibliographies by topics / Transformation de shearing

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Academic literature on the topic 'Transformation de shearing'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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Journal articles on the topic "Transformation de shearing"

1

McGregor, B. A., K. L. Butler, and M. B. Ferguson. "The allometric relationship between clean mohair growth and the fleece-free liveweight of Angora goats is affected by liveweight change." Animal Production Science 53, no. 2 (2013): 154. http://dx.doi.org/10.1071/an12070.

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Clean fleece weight (CFWt) is affected by liveweight and change in liveweight in Merino sheep, Angora and cashmere goats. However, how these relationships progress as animals age has not been elucidated. Measurements were made over 12 shearing periods on a population of Angora goats representing the current range and diversity of genetic origins including South African, Texan and interbred admixtures of these and Australian sources. Records of breed, sire, dam, date of birth, dam age, birthweight, birth parity, weaning weight, liveweight, fleece growth and fleece quality were taken for does and castrated males (wethers) (n = 267 animals). Fleece-free liveweights (FFLwt) were determined for each goat at shearing time by subtracting the greasy fleece weight from the liveweight recorded immediately before shearing. The average of the FFLwt at the start of the period and the FFLWt at the end of the period was calculated (AvFFLwt). Liveweight change (LwtCh) was the change in FFLwt over the period between shearings. A restricted maximum likelihood model was developed for CFWt, after log10 transformation, which allowed the observations of the same animal at different ages to be correlated in an unstructured manner. A simple way of describing the results is: CFWt = κ (AvFFLwt)β, where κ is a parameter that can vary in a systematic way with shearing age, shearing treatment and LwtCh; and β is an allometric coefficient that only varies with LwtCh. CFWt was proportional to FFLwt0.67 but only when liveweight was lost at the rate of 5–10 kg during a shearing interval of 6 months. The allometric coefficient declined to 0.3 as LwtCh increased from 10 kg loss to 20 kg gain during a shearing interval. A consequence is that, within an age group of Angora goats, the largest animals will be the least efficient in converting improved nutrition to mohair.

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2

Deng, Ming Hui, Wen Zhe Li, and Qi Chen Li. "The Image Watermarking against Shearing Based on Dopplerlet Transformation." Advanced Materials Research 181-182 (January 2011): 276–80. http://dx.doi.org/10.4028/www.scientific.net/amr.181-182.276.

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In this paper, a robust image watermarking method in two-dimensional space/spatial-frequency distributions domain is proposed which is robust against geometric distortion. This watermarking is detected by a linear frequency change. The dopplerlet transformation is used to detect the watermark. The chirp signals are used as watermarks and this type of signals is resistant to all stationary filtering methods and exhibits geometrical symmetry. In the two-dimensional Radon-Wigner transformation domain, the chirp signals used as watermarks change only its position in space/spatial-frequency distribution, after applying linear geometrical attack, such as scale rotation and cropping. But the two-dimensional Radon-Wigner transformation needs too much difficult computing. So the image is put into a series of 1D signal by choosing scalable local time windows. The watermark embedded in the dopplerlet transformation domain. The watermark thus generated is invisible and performs well in StirMark test and is robust to geometrical attacks. Compared with other watermarking algorithms, this algorithm is more robust, especially against geometric distortion, while having excellent frequency properties.

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TAKEMOTO, Ryo, Nobuyuki FUJII, Hiroshi FURUICHI, and Yoshinori KANNO. "606 Transformation of metals by Shearing at High Pressure." Proceedings of Yamanashi District Conference 2005 (2005): 165–66. http://dx.doi.org/10.1299/jsmeyamanashi.2005.165.

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4

Derep, J. L. "Microstructure transformation induced by adiabatic shearing in armour steel." Acta Metallurgica 35, no. 6 (1987): 1245–49. http://dx.doi.org/10.1016/0001-6160(87)90005-8.

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Minghui, D., Z. Qingshuang, and L. Sibo. "The Watermarking Algorithm against Shearing Based on Dopplerlet-radon Transformation." Information Technology Journal 11, no. 3 (2012): 349–53. http://dx.doi.org/10.3923/itj.2012.349.353.

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Echeverri, Marcelo, Constanza Ruiz, and Berta Gómez-Lor. "A high contrast mechanochromic luminescent diacetylene-linked bis-benzothiadiazole derivative." CrystEngComm 23, no. 34 (2021): 5925–30. http://dx.doi.org/10.1039/d1ce00462j.

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Furuichi, Hiroshi, Nobuyuki Fujii, Eiji Ito, Yoshinori Kanno, Seiki Watanabe, and Hiroki Tanaka. "Transformation of SiO2to the amorphous state by shearing at high pressure." American Mineralogist 88, no. 5-6 (2003): 926–28. http://dx.doi.org/10.2138/am-2003-5-623.

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Ma, F., Y. J. Sun, D. Y. Ma, K. W. Xu, and Paul K. Chu. "Reversible phase transformation in graphene nano-ribbons: Lattice shearing based mechanism." Acta Materialia 59, no. 17 (2011): 6783–89. http://dx.doi.org/10.1016/j.actamat.2011.07.036.

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9

Mi, Hui, Qing Nan Shi, Jun Li Wang, Lei Zhou, and Liang Wei Chen. "Effect of Asymmetrical Accumulative Roll-Bonding and Heat Treatment on the Formation of Ultra-Fine Twin Copper." Materials Science Forum 667-669 (December 2010): 611–16. http://dx.doi.org/10.4028/www.scientific.net/msf.667-669.611.

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The ultrafine copper with twins was prepared by asymmetrical accumulative roll-bonding (AARB) and heat treatment. The characteristic of grain refinement and the texture transformation during recrystallization were investigated. The results show that the crossover areas, which were formed by the shear stress during AARB, were zones of compression deformation and shearing deformation when the deformation of copper occurred in these areas. The average grains size was reduced to 1μm from original average size of 30～50μm due to processing by AARB. The strong elastic stress accumulated by shearing texture is responsible for oriental growing of a great number of grains during recrystallization. The shearing texture {001}<110> rotates 54.7°and transforms into annealing texture {111}<211> i.e. twins microstructure.

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Furuichi, Hiroshi, Eiji Ito, Nobuyuki Fujii, Yoshinori Kanno, and Naokuni Torii. "Transformation of gold by shearing at high pressure and at room temperature." Solid State Communications 144, no. 10-11 (2007): 475–77. http://dx.doi.org/10.1016/j.ssc.2007.09.012.

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Dissertations / Theses on the topic "Transformation de shearing"

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Chen, Guoting. "Solutions formelles de systèmes d'équations différentielles ordinaires linéaires homogènes." Phd thesis, Grenoble 1, 1990. http://tel.archives-ouvertes.fr/tel-00338379.

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Le travail présente dans cette thèse est un travail algorithmique portant sur deux sujets: solutions formelles des systèmes d'équations différentielles linéaires ordinaires dépendant (ou pas) d'un paramètre et opérations fondamentales pour les opérateurs différentiels. Dans la première partie: nous avons démontre la convergence d'un algorithme et développe un programme en macsyma pour le calcul de la forme de Frobenius et Jordan de matrices holomorphes. Nous avons aussi développé un algorithme et un programme en macsyma pour le calcul de formes de Arnold-Wasow de matrices et systèmes différentiels dépendant d'un paramètre. Grâce a ces algorithmes, l'algorithme de Turrittin-Wasow est adapte au calcul formel pour trouver les solutions formelles de systemes differentiels dépendant d'un paramétré. Nous avons developpe un programme en macsyma pour le calcul de solutions formelles de systèmes différentiels dans un voisinage du point singulier régulier. Dans la deuxième partie: nous avons développe des algorithmes pour des opérations fondamentales sur deux opérateurs différentiels: le plus grand commun diviseur, le plus petit commun multiples, l'algorithme de Bezout, le pseudo-résultant. Nous avons aussi étudie une généralisation directe de la notion de base de Grobner dans l'anneau des opérateurs différentiels a coefficients polynomiaux, i.e. L'algèbre de Weyl

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2

Abbas, Hassane. "Contribution à l'étude de la réduction formelle des systèmes différentiels méromorphes linéaires." Phd thesis, Grenoble INPG, 1993. http://tel.archives-ouvertes.fr/tel-00343445.

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Cette thèse est consacrée au calcul des solutions formelles d'un système différentiel linéaire méromorphe dans un voisinage de l'origine de c de la forme y(z)=a(z)y(z). Il est bien connu qu'une matrice fondamentale de solutions s'écrit formellement sous forme h(z)=f(z)g(z), ou f(z) est une série formelle en racine de z et g(z) est une matrice de fonctions élémentaires qui constituent des exponentiels polynomiaux en racine de z#1, puissance complexe de z##1, et puissance entière positive de log z. H. L. Turrittin et w. Wasow ont propose une methode algorithmique pour calculer h(z). Cette methode coute chére en calcul. Devant ce fait, nous proposons une nouvelle approche algorithmique pour trouver h(z). Cette approche a l'avantage d'utiliser des transformations simples et moins couteuses en calcul. De plus, notre approche permet de calculer le plus grand degré des polynômes exponentiels qui se trouvent dans la matrice g(z). En pratique, les systèmes a deux dimensions sont importants. Dans ce cas, nous proposons une methode programmable, inspirée de l'approche générale précédente pour calculer les solutions au voisinage d'une singularité

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Conference papers on the topic "Transformation de shearing"

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Manikandan, G., N. Sairam, R. Sudhan, and B. Vaishnavi. "Shearing based data transformation approach for privacy preserving clustering." In 2012 Third International Conference on Computing, Communication and Networking Technologies (ICCCNT 2012). IEEE, 2012. http://dx.doi.org/10.1109/icccnt.2012.6395985.

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2

Deng, Minghui, Qingshuang Zeng, and Xiuli Zhou. "Robust Image Watermarking against Shearing Based on Hilbert-Huang Transformation." In 2010 2nd International Conference on Information Engineering and Computer Science (ICIECS). IEEE, 2010. http://dx.doi.org/10.1109/iciecs.2010.5678334.

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3

Qi, Lihua, Jihua Huang, Xingke Zhao, and Hua Zhang. "Microstructural Transformation on SnAgCu/Cu Interface Induced by Thermal-shearing Cycling." In 2008 10th Electronics Packaging Technology Conference (EPTC 2008). IEEE, 2008. http://dx.doi.org/10.1109/eptc.2008.4763483.

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4

Qi, Lihua, Jihua Huang, Hua Li, Xingke Zhao, and Hua Zhang. "Microstructures Transformation in Sn-Base Solders under the Isothermal and Thermal-Shearing Cycling Condition." In 2006 7th International Conference on Electronic Packaging Technology. IEEE, 2006. http://dx.doi.org/10.1109/icept.2006.359802.

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5

Naik, Rajiv A., Daniel P. DeLuca, and Dilip M. Shah. "Critical Plane Fatigue Modeling and Characterization of Single Crystal Nickel Superalloys." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30300.

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Single crystal nickel-base superalloys deform by shearing along <111> planes, sometimes referred to as “octahedral” slip planes. Under fatigue loading, cyclic stress produces alternating slip reversals on the critical slip systems which eventually results in fatigue crack initiation along the ‘critical’ octahedral planes. A ‘critical plane’ fatigue modeling approach was developed in the present study to analyze high cycle fatigue (HCF) failures in single crystal materials. This approach accounted for the effects of crystal orientation and the micromechanics of the deformation and slip mechanisms observed in single crystal materials. Three-dimensional (3-D) stress and strain transformation equations were developed to determine stresses and strains along the crystallographic octahedral planes and corresponding slip systems. These stresses and strains were then used to calculate several multiaxial critical plane parameters to determine the amount of fatigue damage and also the ‘critical planes’ along which HCF failures would initiate. The computed fatigue damage parameters were used along with experimentally measured fatigue lives, at 1100° F, to correlate the data for different loading orientations. Microscopic observations of the fracture surfaces were used to determine the actual octahedral plane (or facet) on which fatigue initiation occurred. X-ray diffraction measurements were then used to uniquely identify this damage initiation facet with respect to the crystal orientation in each specimen. These experimentally determined HCF initiation planes were compared with the analytically predicted ‘critical planes’.

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6

Kullolli, Borana, Matthias Baeßler, Pablo Cuéllar, Shilton Rica, and Frank Rackwitz. "An Enhanced Interface Model for Friction Fatigue Problems of Axially Loaded Piles." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96078.

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Abstract The shaft bearing capacity often plays a dominant role for the overall structural behaviour of axially loaded piles in offshore deep foundations. Under cyclic loading, a narrow zone of soil at the pile-soil interface is subject to cyclic shearing solicitations. Thereby, the soil may densify and lead to a decrease of confining stress around the pile due to micro-phenomena such as particle crushing, migration and rearrangement. This reduction of radial stress has a direct impact on the shaft capacity, potentially leading in extreme cases to pile failure. An adequate interface model is needed in order to model this behaviour numerically. Different authors have proposed models that take typical interface phenomena in account such as densification, grain breakage, normal pressure effect and roughness. However, as the models become more complex, a great number of material parameters need to be defined and calibrated. This paper proposes the adoption and transformation of an existing soil bulk model (Pastor-Zienkiewicz) into an interface model. To calibrate the new interface model, the results of an experimental campaign with the ring shear device under cyclic loading conditions are here presented. The constitutive model shows a good capability to reproduce typical features of sand behaviour such as cyclic compaction and dilatancy, which in saturated partially-drained conditions may lead to liquefaction and cyclic mobility phenomena.

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Mortazavian, Ershad, Zhiyong Wang, and Hualiang Teng. "Thermal-Kinetic-Mechanical Modeling of Laser Powder Deposition Process for Rail Repair." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10758.

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Abstract The study established a three-dimensional, thermal-kinetic-mechanical finite element (FE) model to simulate an additive manufacturing process with a laser powder deposition (LPD) approach for repairing a 75-lb rail that is broadly used for light rail transportation in the US. A worn rail specimen is repaired using 304L stainless steel powders as the deposition material for lab tests. The researchers incorporated an element-birth-and-kill technique to activate the deposition elements step-by-step, according to the build-up strategy along which the laser heat source is translated simultaneously. The laser power attenuation and solid-state transformation expressions are described using external user-defined subroutines for thermal and kinetic analysis, respectively. A set of equations for calculation of hardness for both of the rail and deposition materials are also defined and developed in the FE model. The microstructure distribution coming from kinetic analysis output is employed for hardness calculation. The estimation of the width and depth of the dilution zone in thermal analysis is compared with the experimental results of the repaired specimen to validate the thermal model. Scanning Electron Microscope (SEM) and Optical Microscope (OM) analyses, along with a Rockwell B-scale hardness test are performed to validate the outgoing microstructure and hardness results of the FE model. Mechanical analysis results showed that residual thermal stresses can significantly reduce the safety margin against shearing off the deposition part under a dynamic train load. The validated model demonstrated great potential for investigating the effects of the variation of different LPD process parameters on the final mechanical and metallurgical properties of the repaired rail.

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