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排序方式: 共有125条查询结果,搜索用时 15 毫秒
1.
C. A. Gracia-Fernández P. Davies S. Gómez-Barreiro J. López Beceiro J. Tarrío-Saavedra R. Artiaga 《Journal of Thermal Analysis and Calorimetry》2010,102(3):1057-1062
The development of photopolymers was helped by the development of photocalorimetry, which is now a basic technique for the
study of these materials. This work shows how to obtain vitrification times in single isothermal curing experiments by monitoring
the reversing heat capacity along time in modulated temperature DSC–photocuring systems, overcoming the time-consuming problem
of standard DSC. The effects of the light intensity and the isothermal curing temperature on the vitrification time of a photocurable
system were evaluated. The results obtained at a given curing temperature with different light intensities indicate that the
UV-light affects the molecular mobility hindering the vitrification process. The effects of the curing temperature on the
vitrification time, the conversion at the vitrification time and the maximum conversion were also evaluated. 相似文献
2.
YANG Hong-Tao LIU Jun GENG Qing-Xi LIU Chang-Qin ZHANG Pin GAO Xiao-Yu ZHA Min JING Gui-Ru JING Cai-Liu ZHU Qing-Qi Cheung T Leung K NG L 《中国物理C(英文版)》2006,30(6):497-500
The lg Ne-Nμ relationship has been studied from 4.4×104 events (total observation time is 2.9×106s)collected from Mt. Liang Wang Array (24.5°N, 102.9°E, 2720m above sea level). In order to study the mass composition at the knee, Monte-Carlo simulations for the EAS development and detection under same event selection criteria as used in the experimental data have been performed. The result shows that the mass composition of primary cosmic rays has no obvious change and the dominant component is light nuclei around the knee. 相似文献
3.
In this paper a method for the resolution of the differential equation of the Jacobi vector fields in the manifold V
1 = Sp(2)/SU(2) is exposed. These results are applied to determine areas and volumes of geodesic spheres and balls.
Work partially supported by DGI (Spain) and FEDER Projects MTM 2004-06015-C02-01 and MTM 2007-65852 (first author) and by
Research Project PGIDIT05PXIB16601PR (second author).
Authors’ addresses: A. M. Naveira, Departamento de Geometría y Topología. Facultad de Matemáticas, Avda. Andrés Estellés,
N1, 46100 – Burjassot, Valencia, Spain; A. D. Tarrío Tobar, E. U. Arquitectura Técnica, Campus A Zapateira. Universidad de
A Coru?a, 15192 – A Coru?a, Spain 相似文献
4.
A general formulation of the nonlinear filtering problem inRiemanman manifolds is given by use of the strong solutionsof the stochastic differential equations for the state and observationprocesses in the orthonormal frame bundles of the state andobservation process manifolds, respectively. A general Bayesformula for the conditional expectation of smooth functionsof the state process is given. This is used to give a directderivation of the Zakai equation for the general problem underconsideration. An example is presented. 相似文献
5.
6.
We obtain rigidity results on arbitrary proper holomorphic maps F from an irreducible bounded symmetric domain Ω of rank ≥2 into any complex space Z. After lifting to the normalization of the subvariety F (Ω) Z, we prove that F must be the canonical projection map to the quotient space of Ω by a finite group of automorphisms. The approach is along the line of the works of Mok and Tsai by considering radial limits of bounded holomorphic functions derived from F and proving that proper holomorphic maps between bounded symmetric domains preserve certain totally geodesic subdomains. In contrast to the previous works, in general we have to deal with multivalent holomorphic maps for which Fatou’s theorem cannot be applied directly. We bypass the difficulty by devising a limiting process for taking radial limits of correspondences arising from proper holomorphic maps and by elementary estimates allowing us to define distinct univalent branches of the underlying multivalent map on certain subsets. As a consequence of our rigidity result, with the exception of Type-IV domains, any proper holomorphic map f : Ω→ D of Ω onto a bounded convex domain D is necessarily a biholomorphism. In the exceptional case where Ω is a Type-IV domain, either f is a biholomorphism or it is a double cover branched over a totally geodesic submanifold which can be explicitly described. 相似文献
7.
Leovigildo Alonso Tarrío Ana Jeremías López Marta Pérez Rodríguez María J. Vale Gonsalves 《Journal of Pure and Applied Algebra》2018,222(4):828-845
Let be an Adams geometric stack. We show that , its derived category of quasi-coherent sheaves, satisfies the axioms of a stable homotopy category defined by Hovey, Palmieri and Strickland in [13]. Moreover we show how this structure relates to the derived category of comodules over a Hopf algebroid that determines . 相似文献
8.
KM Varier AM Vinodkumar NVSV Prasad PV Madhusudhana Rao DL Sastry Lagy T Baby MC Radhakrishna NG Puttaswamy JJ Das P Sugathan N Madhavan AK Sinha DO Kataria 《Pramana》1999,53(3):529-533
Large enhancements have been observed in the sub-barrier fusion cross sections for Ti+Ni systems in our previous studies.
Coupled channel calculations incorporating couplings to 2+ and 3− states failed to explain these enhancements completely. A possibilty of transfer channels contributing to the residual enhancements
had been suggested. In order to investigate the role of relevant transfer channels, measurements of one- and two-nucleon transfer
were carried out for 46,48Ti+61Ni systems. The present paper gives the results of these studies. 相似文献
9.
We define a Henstock-type integral on measure spaces with metrictopologies, and give an example of a function which is integrablebut whose absolute value is not. 1991 Mathematics Subject Classification26A39, 46G12. 相似文献
10.