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21.
Isabelle Titeux Yuming M. Li Karl Debray Ying-Qiao Guo 《Comptes Rendus Mecanique》2004,332(11):901-906
This Note deals with an efficient algorithm to carry out the plastic integration and compute the stresses due to large strains for materials satisfying the Hill's anisotropic yield criterion. The classical algorithm of plastic integration such as ‘Return Mapping Method’ is largely used for nonlinear analyses of structures and numerical simulations of forming processes, but it requires an iterative schema and may have convergence problems. A new direct algorithm based on a scalar method is developed which allows us to directly obtain the plastic multiplier without an iteration procedure; thus the computation time is largely reduced and the numerical problems are avoided. To cite this article: I. Titeux et al., C. R. Mecanique 332 (2004). 相似文献
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H. Sainte-Claire Deville und H. Debray 《Fresenius' Journal of Analytical Chemistry》1876,15(1):454-455
Ohne Zusammenfassung 相似文献
26.
Dr. Adrien Lignie Dr. Wei Zhou Dr. Pascale Armand Dr. Benoit Rufflé Richard Mayet Jerôme Debray Dr. Patrick Hermet Dr. Bertrand Ménaert Dr. Philippe Thomas Prof. Philippe Papet 《Chemphyschem》2014,15(1):118-125
From high‐precision Brillouin spectroscopy measurements, six elastic constants (C11, C33, C44, C66, C12, and C14) of a flux‐grown GeO2 single crystal with the α‐quartz‐like structure are obtained in the 298–1273 K temperature range. High‐temperature powder X‐ray diffraction data is collected to determine the temperature dependence of the lattice parameters and the volume thermal expansion coefficients. The temperature dependence of the mass density, ρ, is evaluated and used to estimate the thermal dependence of its refractive indices (ordinary and extraordinary), according to the Lorentz–Lorenz equation. The extraction of the ambient piezoelectric stress contribution, e11, from the C′11–C11 difference gives, for the piezoelectric strain coefficient d11, a value of 5.7(2) pC N?1, which is more than twice that of α‐quartz. As the quartz structure of α‐GeO2 remains stable until melting, piezoelectric activity is observed until 1273 K. 相似文献
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H. Debray 《Fresenius' Journal of Analytical Chemistry》1868,7(1):483-485
Ohne Zusammenfassung 相似文献
28.
The structural and electronic transport properties of La1−x
Ce
x
MnO3 (x=0.0–1.0) have been studied. All the samples exhibit orthorhombic crystal symmetry and the unit cell volume decreases with
Ce doping. They also make a metal-insulator transition (MIT) and transition temperature increases with increase in Ce concentration
up to 50% doping. The system La0.5Ce0.5MnO3 also exhibits MIT instead of charge-ordered state as observed in the hole doped systems of the same composition. 相似文献
29.
Rocha BA Moreno FB Delatorre P Souza EP Marinho ES Benevides RG Rustiguel JK Souza LA Nagano CS Debray H Sampaio AH de Azevedo WF Cavada BS 《Applied biochemistry and biotechnology》2009,152(3):383-393
The unique carbohydrate-binding property of lectins makes them invaluable tools in biomedical research. Here, we report the purification, partial primary structure, carbohydrate affinity characterization, crystallization, and preliminary X-ray diffraction analysis of a lactose-specific lectin from Cymbosema roseum seeds (CRLII). Isolation and purification of CRLII was performed by a single step using a Sepharose-4B-lactose affinity chromatography column. The carbohydrate affinity characterization was carried using assays for hemagglutination activity and inhibition. CRLII showed hemagglutinating activity toward rabbit erythrocytes. O-glycoproteins from mucine mucopolysaccharides showed the most potent inhibition capacity at a minimum concentration of 1.2 microg mL(-1). Protein sequencing by mass spectrometry was obtained by the digestion of CRLII with trypsin, Glu-C, and AspN. CRLII partial protein sequence exhibits 46% similarity with the ConA-like alpha chain precursor. Suitable protein crystals were obtained with the hanging-drop vapor-diffusion method with 8% ethylene glycol, 0.1 M Tris-HCl pH 8.5, and 11% PEG 8,000. The monoclinic crystals belong to space group P2(1) with unit cell parameters a = 49.4, b = 89.6, and c = 100.8 A. 相似文献
30.
A type of extensions called the -extention of topological spaces and their -equivalence and -trace systems are introduced, which ultimately characterize H-closed -extensions of a Hausdorff topological space. Also, the notion of -principal extensions is defined. A typical -principal extension consisting of certain grills on a Hausdorff space is constructed, and finally, some characterizations of H-closedness of a Hausdorff space are obtained.AMS Subject Classification (2000) 54D30 54D99 相似文献