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排序方式: 共有593条查询结果,搜索用时 2 毫秒
1.
Dmitri E. Nikonov George I. Bourianoff Paolo A. Gargini 《Journal of Superconductivity and Novel Magnetism》2006,19(6):497-513
Quantum limits of power dissipation in spintronic computing are estimated. A computing element composed of a single electron
in a quantum dot is considered. Dynamics of its spin due to external magnetic field and interaction with adjacent dots are
described via the Bloch equations. Spin relaxation due to magnetic noise from various sources is described as coupling to
a reservoir. Resulting dissipation of energy is calculated and is shown to be much less than the thermal limit, ∼kT per bit,
if the rate of spin relaxation is much slower than the switching rate. Clues on how to engineer an energy efficient spintronic
device are provided. 相似文献
2.
S. M. Nikonov I. V. Elkin I. A. Lipatov A. V. Basov A. V. Kapustin A. A. Rovnov 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2007,41(6):351-354
Results of experiments conducted on a large-scale integral PSB-VVéR bench and directed toward investigation of the performance
of new passive safety systems for nuclear plants with a water-cooled power reactor, an additional system for passive flooding
of the active zone, and a system for the passive removal of heat from steam generators are presented.
__________
Translated from élektricheskie Stantsii, No. 9, September 2007, pp. 7–10. 相似文献
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5.
Anatoly M. Dolgonosov Ruslan Kh. Khamizov Anna N. Krachak Andrei G. Prudkovsky 《Reactive and Functional Polymers》1995,28(1)
A model for multispecies ion-exchange kinetics based on the Nernst-Planck equation is suggested. It is analyzed in comparison with the “locally-determinate” model described by Hwang and Helfferich [1]. The model makes possible simple computation. The conditions for the occurrence of unusual kinetic curves with a maximum are clarified. The proposed model is developed for different types of kinetic problems and verified by the experimental investigation of a kinetics in ternary systems. 相似文献
6.
Scientific-Production Association "Krasnaya Zvezda." Translated from Atomnaya Énergiya, Vol. 73, No. 5, pp. 346–350, November, 1992. 相似文献
7.
Zhen-Kun Huang Anatoly Rosenflanz I-Wei Chen 《Journal of the American Ceramic Society》1997,80(5):1256-1262
Using intermediate, liquid-forming compositions in the (Y,La)2 O3 -AlN system as additives, fully dense Si3 N4 ceramics with high strength at high temperature have been obtained by pressureless sintering. The ceramics contain rod-shaped β-Si3 N4 with M' or K' solid solutions as grain-boundary phases. The strength of these ceramics is 1150 MPa at 1200°C, and the room-temperature toughness is maintained at }7 MPa·m1/2 . Phase relations that are pertinent to the new additive compositions are delineated to rationalize their beneficial effects on sinterability and mechanical properties. 相似文献
8.
HaengSeok Yang SangKyeong Yun JongHyeong Song SeungDo An HeungWoo Park Shyshkin Ihar Victor Yurlov Lapchuk Anatoly 《Journal of the Society for Information Display》2010,18(6):445-453
Abstract— The development of a compact, efficient VGA projection module to be embedded in mobile devices is reported. The design incorporates laser/laser diode (LD) light sources, Schlieren optics, and a one‐dimensional diffractive spatial optical modulator (SOM). During development, the optical parameters were determined and the relationships between the parameters to optimize the optical specifications were derived. The resulting optimized specifications enable us to manufacture two types of optical modu les as compact as 13 cc and with as little as 10% speckle contrast ratio. 相似文献
9.
Sergio M. Davis Anatoly B. Belonoshko Börje Johansson 《Computer Physics Communications》2011,(5):1105-1110
We present an implementation of a stochastic optimization algorithm applied to location of atomic vacancies. Our method labels an empty point in space as a vacancy site, if the total spatial overlap of a “virtual sphere”, centered around the point, with the surrounding atoms (and other vacancies) falls below a tolerance parameter. A Metropolis-like algorithm displaces the vacancies randomly, using an “overlap temperature” parameter to allow for acceptance of moves into regions with higher overlap, thus avoiding local minima. Once the algorithm has targeted a point with low overlap, the overlap temperature is decreased, and the method works as a steepest descent optimization.Our method, with only two free parameters, is able to detect the correct number and coordinates of vacancies in a wide spectrum of condensed-matter systems, from crystals to amorphous solids, in fact in any given set of atomic coordinates, without any need of comparison with a reference initial structure. 相似文献
10.
Consideration is given to the problem of large-scale projects competition in the formulation motivated by real problems of defining the rational development of oil and gas transportation systems. The problem is formulated as a noncooperative game of n persons. Standard existence theorems and algorithms for computing the Nash equilibrium solutions are not applicable to it. For the case when all functional parameters of the problem are defined by exponential functions, a finite solution algorithm is proposed. Here is developed the approach proposed and studied in [1–5]. 相似文献