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20世纪40年代初以来渤海形态变化特征
渤海 海岸线 等深线 数字高程模型(DEM) 重心 形态特征
2017/9/1
20世纪中期以来中国沿海经历了多次围填海热潮，2000年以来环渤海区域大规模围填海已使其成为近期中国围填海的重点区域。利用地形图、海图和遥感影像等资料获取的渤海多时相的平面重心、立体重心、海岸线、低潮线、等深线、海区面积和海区体积等指标变化信息，系统揭示渤海形态的长期变化特征。结果表明：近70年来，渤海面积不断萎缩，岸线普遍向海扩张，导致渤海的平面重心总体向东偏北方向移动，但渤海的平面周长总体呈增...
品牌延伸类型选择:不同品牌概念下契合度和真实度对延伸产品态度的影响研究
品牌延伸 品牌概念 契合度 真实度
2017/4/10
借助原品牌推出延伸产品以实施跨界业务突围是当下企业发展的大势。但关键是，哪种延伸类型更能影响消费者的延伸产品态度?基于品牌概念一致性理论和实验研究方法，本文对比研究了不同延伸类型在不同品牌概念下的适用性。实验结果表明：第一，当原品牌是功能型概念品牌时，因为消费者以产品类别为信息线索形成原品牌的联想模式，故契合度，即强调延伸产品要与原品牌在产品类别上相似的延伸类型，更能影响消费者的延伸产品态度；第二...
Fulton's universal Schubert polynomials give cohomology formulas
for a class of degeneracy loci, which generalize Schubert varieties. The Ktheoretic quiver formula of Buch expresses the structure she...
QUASI-OPTIMAL CONVERGENCE RATE OF AN ADAPTIVE DISCONTINUOUS GALERKIN METHOD
Discontinuous Galerkin interior penalty nonconforming meshes
2015/12/11
We analyze an adaptive discontinuous finite element method (ADFEM) for symmetric
second order linear elliptic operators. The method is formulated on nonconforming meshes made
of simplices or q...
We design an adaptive finite element method (AFEM) for mixed boundary value problems associated with the differential operator A − ∇div in H(div,Ω). For A being a
variab...
SECOND-ORDER CORRECTIONS TO MEAN FIELD EVOLUTION OF WEAKLY INTERACTING BOSONS. II
SECOND-ORDER WEAKLY INTERACTING BOSONS
2015/10/15
We study the evolution of a N-body weakly interacting system of Bosons. Our work forms an extension of our previous paper I [13], in which we derived a second-order correction
to a mean-field e...
We prove that the essential dimension of the spinor group
Spinn grows exponentially with n and use this result to show that quadratic forms with trivial discriminant and Hasse-Witt invariant are more...
We consider the motion of a particle in a random isotropic force field. Assuming
that the force field arises from a Poisson field in Rd, d 4, and the
initial velocity of the part...
CONVEX REAL PROJECTIVE STRUCTURES ON COMPACT SURFACES
PROJECTIVE STRUCTURES COMPACT SURFACES
2015/9/29
The purpose of this paper is to investigate convex real projective structures on compact surfaces. Let RP2
be the real projective plane and
PGL(3, R) the group of projective transformations RP2
—...
BASE CHANGE FOR BERNSTEIN CENTERS OF DEPTH ZERO PRINCIPAL SERIES BLOCKS
BERNSTEIN ZERO PRINCIPAL SERIES BLOCKS
2015/9/29
Let G be an unrami ed group over a p-adic eld. This article introduces a base change homomorphism for Bernstein centers of depth-zero principal
series blocks for G and proves the corresponding base ...
In this note we generalize the algebraic approach to intertwiners given in [HKP],
from split groups to unramiˉed groups. Actually, it is perfectly clear that the methods of the current note extend to...
This article presents a theory of the cognitive processes involved in learning to read and examines the degree to which measures derived from this theory are able to predict success in reading. Measur...
Homoclinic Orbits of the FitzHugh–Nagumo Equation: Bifurcations in the Full System
homoclinic bifurcation singular perturbation
2015/8/25
This paper investigates travelling wave solutions of the FitzHugh–Nagumo equation from the viewpoint
of fast-slow dynamical systems. These solutions are homoclinic orbits of a three dimensional
vect...
Fruit Flies Modulate PassiveWing Pitching to Generate In-Flight Turns
In-Flight Turns PassiveWing Pitching
2015/8/25
Flying insects execute aerial maneuvers through subtle manipulations of their wing motions. Here, we
measure the free-flight kinematics of fruit flies and determine how they modulate their wing pitch...
Adaptive Multiscale Detection of Filamentary Structures Embedded in a Background of Uniform Random Points
Multiscale Geometric Analysis Pattern Recognition
2015/8/21
We are given a set of n points that appears uniformly distributed in the unit square [0,1]2.
We wish to test whether the set actually is generated from a non-uniform distribution having
a small frac...