搜索结果: 16-30 共查到“理学 branching”相关记录56条 . 查询时间(0.056 秒)
A branching diffusion model of selection: from the neutral Wright-Fisher case to the one including mutations
Diffusions Doob transform killing, branching quasi-stationarity Wright-Fisher model neutral or with mutation selection
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2011/10/8
Abstract: We consider diffusion processes x_{t} on the unit interval. Doob-transformation techniques consist of a selection of x_{t}-paths procedure. The law of the transformed process is the one of a...
Branching Markov processes on fragmentation trees generated from the paintbox process
Branching Markov processes fragmentation trees the paintbox process Probability
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2011/9/5
Abstract: A fragmentation of a set $A$ is a graph with vertices labeled by subsets of $A$ which obey a certain parent-child relationship. A random fragmentation tree is a probability distribution on t...
Branching diffusion in inhomogeneous media
Branching diffusion inhomogeneous media Probability
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2011/8/26
Abstract: We investigate the long-time evolution of branching diffusion processes (starting with a finite number of particles) in inhomogeneous media. The qualitative behavior of the processes depends...
A generalized Steinberg section and branching rules for quantum groups at roots of 1
generalized Steinberg section branching rules quantum groups
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2011/8/23
Abstract: In this paper we construct a generalization of the classical Steinberg section for the quotient map of a semisimple group with respect to the conjugation action. We then give various applica...
Critical Multitype Branching Systems: Extinction Results
Critical branching particle system Extinction Markov renewal process
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2011/8/22
Abstract: We consider a critical branching particle system in $\R^d$, composed of individuals of a finite number of types $i\in\{1,...,K\}$. Each individual of type $i$ moves independently according t...
Branching of the W(H4) Polytopes and Their Dual Polytopes under the Coxeter Groups W(A4) and W(H3) Represented by Quaternions
Dual Polytopes the W(H4) Polytopes Quaternions
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2011/7/26
Abstract: 4-dimensional H4 polytopes and their dual polytopes have been constructed as the orbits of the Coxeter-Weyl group W(H4) where the group elements and the vertices of the polytopes are represe...
Intrinsic branching structure within random walk on $\mathbb{Z}$
random walk branching process random environment invariant density
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2011/1/17
In this paper, we reveal the branching structure for a non-homogeneous random walk with bounded
jumps. The ladder time T1, the first hitting time of [1,∞) by the walk starting from 0, could be expres...
On the moments and the interface of the symbiotic branching model
Symbiotic branching model mutually catalytic branching
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2011/1/19
In this paper we introduce a critical curve separating the asymptotic behavior of the moments of the symbiotic branching model,introduced by Etheridge and Fleischmann [Stochastic Process. Appl.114 (20...
A Lamperti type representation of Continuous-State Branching Processes with Immigration
Levy processes Continuous branching processes with immigration time-change
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2011/1/20
Guided by the relationship between the breadth- rst walk of a rooted tree and its sequence of generation sizes, we extend the Lamperti representation of continuous-state branching processes to allow i...
Modeling branching effects on source-sink relationships of the cotton plant
Functional-structural model Parameter optimization Source-sink relationship
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2011/2/21
Compared with classical process-based models,the functional-structural plant models provide more efficient tools to explore the impact of changes in plant structures on plant functioning.
An Age Dependent Branching Model for Macroevolution
Age Dependent Branching Model Macroevolution
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2011/1/5
The imbalance of phylogenetic trees exhibits a systematic deviation from the expectation of a purely random tree growth process as in the Yule or ERM models. Here we introduce an age dependent growth ...
Modeling branching effects on source-sink relationships of the cotton plant
Modeling branching source-sink the cotton plant
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2011/1/6
Compared with classical process-based models, the functional-structural plant models provide more efficient tools to explore the impact of changes in plant structures on plant functioning. In this pap...
Particle approximation of the intensity measures of a spatial branching point process arising in multi-target tracking
Spatial branching processes multi-target tracking problems
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2011/2/25
The aim of this paper is two-fold. First we analyze the sequence of intensity measures of a spatial branching point process arising in a multiple target tracking context. We study its stability proper...
Poisson--Dirichlet branching random walks
Poisson--Dirichlet random walks
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2011/1/20
We determine, to within O(1), the expected minimal position at level n in certain branching random walks. The walks under consideration have displacement vector (v1; v2; : : :) where each vj is the su...
Tightness for Maxima of Generalized Branching Random Walks
Tightness for Maxima of Generalized Random Walks
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2011/1/18
We study generalized branching random walks, which allow time dependence and local dependence
between siblings. Under appropriate tail assumptions, we prove the tightness of Fn(· −Med(Fn)), whe...