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排序方式: 共有2132条查询结果,搜索用时 125 毫秒
111.
In this paper, we consider a kind of neutral functional differential equation as follows:
112.
Robert S. Maier 《Journal of statistical physics》2003,111(5-6):1027-1048
Several formulas for crossing functions arising in the continuum limit of critical two-dimensional percolation models are studied. These include Watts's formula for the horizontal-vertical crossing probability and Cardy's new formula for the expected number of crossing clusters. It is shown that for lattices where conformal invariance holds, they simplify when the spatial domain is taken to be the interior of an equilateral triangle. The two crossing functions can be expressed in terms of an equianharmonic elliptic function with a triangular rotational symmetry. This suggests that rigorous proofs of Watts's formula and Cardy's new formula will be easiest to construct if the underlying lattice is triangular. The simplification in a triangular domain of Schramm's bulk Cardy's formula is also studied. 相似文献
113.
114.
This paper deals with the following class of singular biharmonic problems
115.
Let be a bounded domain such that . We obtain existence of sign-changing solutions for the Dirichlet problem on Ω,u=0 on ∂Ω for suitable positive numbers μ and λ. 相似文献
116.
Yang Haitao 《Journal of Differential Equations》2003,189(2):487-512
The following singular elliptic boundary value problem is studied:
117.
118.
119.
The paper discusses the basic design of the critical facility, whose main purpose is the physics validation of AHWR. Apart
from moderator level control, the facility will have shutdown systems based on shutoff rods and multiple ranges of neutron
detection systems. In addition, it will have a flux mapping system based on 25 fission chambers, distributed in the core.
We are planning to use this reactor for experiments with a suitable source to simulate an ADS system. Any desired sub-criticality
can be achieved by adjusting the moderator level. Apart from perfecting our experimental techniques, in simple configurations,
we intend to study the one-way coupled core in this facility. Preliminary calculations, employing a Monte Carlo code TRIPOLI,
are presented.
相似文献
120.
A. B. Shapoval M. G. Shnirman 《The European Physical Journal B - Condensed Matter and Complex Systems》2007,59(3):399-403
This paper considers a one-parameter family of sand-piles.
The family exhibits the crossover
between the models with deterministic and stochastic relaxation.
The mean pile height is used to describe the crossover.
The height densities corresponding to the models with relaxation
of both types approach one another as the parameter increases.
Relaxation is supposed to deal
with the local losses of grains by a fixed amount.
In that case the densities show a step-like behaviour
in contrast to the peaked shape
found in the models with the local loss of grains down
to a fixed level
[S. Lübeck, Phys. Rev. E 62, 6149 (2000)].
A spectral approach based on the long-run properties of the pile height
considers the models with deterministic and random relaxation
more accurately and
distinguishes between the two cases for admissible parameter values. 相似文献