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51.
Mikhail V. Feigel'man Lev. B. Ioffe Vadim B. Geshkenbein Gianni Blatter 《Journal of Low Temperature Physics》2000,118(5-6):805-816
We propose a new method to measure the coherence time ofsuperconducting phase qubits based on the analysis of themagnetic-field dependent dc nonlinear Andreev current across ahigh-resistance tunnel contact between the qubit and a dirtymetal wire and derive a quantitative relation between thesubgap I–V characteristic and the internal correlationfunction of the qubit. 相似文献
52.
Vadim I. Polezhaev Marina N. Myakshina Sergey A. Nikitin 《International Journal of Heat and Mass Transfer》2012,55(1-3):156-165
Coupling of two basic mechanisms of gravity-driven convection is named as convective interactions in the paper. Classification of applications of the interaction mechanism with different orientation of input (output) heat flux to the gravity force is suggested. Brief overview and comments are done. For illustration of the classification a number of examples on the basis of experience in technique and technology are presented. Some convective interaction features with change of orientation for a model of differently heated square are shown. Critical value of the angle for bifurcation onset, heat transfer and temperature stratification in dependency of the angle, temperature oscillations onset in dependency of Pr number for inclined square are presented. 相似文献
53.
Motrenko Anastasia Simchuk Egor Khairullin Renat Inyakin Andrey Kashirin Daniil Strijov Vadim 《Multimedia Tools and Applications》2022,81(4):4877-4895
Multimedia Tools and Applications - The paper addresses the problem of human activity recognition based on the data from wearable sensors. Human activity recognition depends on a wide context of... 相似文献
54.
Korolev Vadim V. Bean Jonathan J. Nevolin Yurii M. Kucherinenko Yaroslav V. McKenna Keith P. Protsenko Pavel V. 《Metallurgical and Materials Transactions A》2022,53(2):449-459
Metallurgical and Materials Transactions A - The misorientation of 515 grain boundaries has been determined using electron backscatter diffraction data from an 18 μm thick copper foil with... 相似文献
55.
Vadim V. Silberschmidt 《Journal of Materials Science》2006,41(20):6768-6776
Composite materials demonstrate a considerable extent of heterogeneity. A non-uniform spatial distribution of reinforcement
results in variations of local properties of fibrous laminates. This non-uniformity not only affects effective properties
of composite materials but is also a crucial factor in initiation and development of damage and fracture processes that are
also spatially non-uniform. Such randomness in microstructure and in failure evolution is responsible for non-uniform distributions
of stresses in composite specimens even under externally uniform loading, resulting, for instance, in a random distribution
of matrix cracks in cross-ply laminates. The paper deals with statistical features of a distribution of carbon fibres in a
transversal cross-sectional area in a unidirectional composite with epoxy matrix, based on various approaches used to quantify
its microscopic randomness. A random character of the fibres’ distribution results in fluctuations of local elastic moduli
in composites, the bounds of which depend on the characteristic length scale. A lattice model to study damage and fracture
evolution in laminates, linking randomness of microstructure with macroscopic properties, is discussed. An example of simulations
of matrix cracking in a carbon fibre/epoxy cross-ply laminate is given. 相似文献
56.
A dipole model is used to simulate incoherent Raman and fluorescent scattering by microspheres. The use of the addition theorem for spherical harmonics circumvents the need to evaluate double sums in the final formulas, thereby drastically reducing computational effort. Special attention is paid to consideration of backscattering geometry, which is important for lidar applications. The formulas derived for backscattering geometry decrease the computation time for size parameter x approdximately 100 by a factor of 200 compared with the time for calculations performed at other angles. 相似文献
57.
Inversion with regularization for the retrieval of tropospheric aerosol parameters from multiwavelength lidar sounding 总被引:1,自引:0,他引:1
Veselovskii I Kolgotin A Griaznov V Müller D Wandinger U Whiteman DN 《Applied optics》2002,41(18):3685-3699
We present an inversion algorithm for the retrieval of particle size distribution parameters, i.e., mean (effective) radius, number, surface area, and volume concentration, and complex refractive index from multiwavelength lidar data. In contrast to the classical Tikhonov method, which accepts only that solution for which the discrepancy reaches its global minimum, in our algorithm we perform the averaging of solutions in the vicinity of this minimum. This averaging stabilizes the underlying ill-posed inverse problem, particularly with respect to the retrieval of number concentration. Results show that, for typical tropospheric particles and 10% error in the optical data, the mean radius could be retrieved to better than 20% from a lidar on the basis of a Nd:YAG laser, which provides a combination of backscatter coefficients at 355, 532, and 1064 nm and extinction coefficients at 355 and 532 nm. The accuracy is improved if the lidar is also equipped with a hydrogen Raman shifter. In this case two additional backscatter coefficients at 416 and 683 nm are available. The combination of two extinction coefficients and five backscatter coefficients then allows one to retrieve not only averaged aerosol parameters but also the size distribution function. There was acceptable agreement between physical particle properties obtained from the evaluation of multiwavelength lidar data taken during the Lindenberg Aerosol Characterization Experiment in 1998 (LACE 98) and in situ data, which were taken aboard aircraft. 相似文献
58.
Minds and Machines - An online game of chess against a human opponent appears to be indistinguishable from a game against a machine: both happen on the screen. Yet, people prefer to play chess... 相似文献
59.
Self-assembling peptides play increasingly important roles in the development of novel materials and drug delivery vehicles. Understanding mechanisms governing the assembly of nanoarchitectures is essential for the generation of peptide-based nanodevices. We find that a cone-shaped derivative of the second transmembrane domain of CXCR4 receptor, x4-2-6 self-assembles into nanospheres, while a related cylindrical peptide, x4-2-9 forms fibrils. Stronger intermolecular interactions in nanospheres than in fibrils result in slow rates of particle disassembly and protection against proteolytic degradation. 相似文献
60.