搜索结果: 1-15 共查到“drift”相关记录22条 . 查询时间(0.109 秒)
Putting Process and Product Conceptions of Natural Selection and Genetic Drift to the Test
natural selection genetic drift process product outcome causation
2016/6/15
This paper argues for two claims. First, despite a persistent appearance to the contrary in the philosophy of biology literature, the question of whether natural selection and genetic drift should be ...
On drift parameter estimation for reflected fractional Ornstein-Uhlenbeck processes
Reflected fractional Ornstein-Uhlenbeck processes fractional Brownian motion frac-tional calculus parameter estimation maximum likelihood estimator sequential maximum likeli-hood estimator
2013/4/28
We consider a reflected Ornstein-Uhlenbeck process driven by a fractional Brownian motion with Hurst parameter $H\in(0,1)$. Our goal is to estimate an unknown drift parameter $\alpha\in (-\infty,\inft...
The maximum likelihood drift estimator for mixed fractional Brownian motion
mixed fractional Brownian motion maximum likelihood estimator large sample asymptotic
2012/9/18
The paper is concerned with the maximum likelihood estimator (MLE) of the unknown drift parameterθ∈Rin the continuous-time regression model Xt =θt+Bt +BHt,t ∈[0, T] whereBt is the Brownian motion and ...
Record statistics and persistence for a random walk with a drift
Record statistics persistence random walk with a drift
2012/9/14
We study the statistics of records of a one-dimensional random walk of nsteps,starting from the origin, and in presence of a constant bias c. At each time-step
the walker makes a random jump of lengt...
Drift dependence of optimal order execution strategies under transient price impact
Drift dependence of optimal order execution strategies transient price impact Trading and Market Microstructure
2012/4/28
We give a complete solution to the problem of minimizing the expected liquidity costs in presence of a general drift when the underlying market impact model has linear transient price impact with expo...
A Random Walk with Drift: Interview with Peter J. Bickel
Random Walk Interview Peter J. Bickel
2011/7/5
I met Peter J. Bickel for the first time in 1981. He came to Jerusalem for a year; I had just started working on my Ph.D. studies.
Truncated Variation, Upward Truncated Variation and Downward Truncated Variation of Brownian Motion with Drift - their Characteristics and Applications
Truncated Variation Brownian Motion Applications
2010/11/3
In [6] for c > 0 we defined truncated variation, T V c μ , of Brownian motion with drift, Wt = Bt+μt, t 0, where (Bt) is a standard Brownian motion.
Random walks with random indices and negative drift conditioned to stay positive
Random walks with random indices negative drift stay positive
2009/9/24
Random walks with random indices and negative drift conditioned to stay positive。
First hitting times and positions of concentric spheres for testing the drift of a diffusion process
First hitting times positions of concentric spheres a diffusion process
2009/9/23
First hitting times and positions of concentric spheres for testing the drift of a diffusion process。
Pursuing the earlier work of Emery [I], Meyer [2], [3]
and the author [4] it is shown that Akma martingales starting from
a varying initial point on the line constitute an Evans-Hudson flow in
the ...
BACKWARD STOCHASTIC NONLINEAR VOILTERRA INTEGRAL EQUATIONS WITH LOCAL LTPSCHITZ DRIFT
Backward stochastic differential equation Volterra integral equation adapted proms
2009/9/18
In this paper, we study backward stochastic nonlinear
Volterra integral equations. Under a local Lipschitz continuity condition
on the drift, we prove the existence and uniqueness result. We
also e...
Asymptotic properties of an estimator of the drift coefficients of multidimensional Ornstein-Uhlenbeck processes that are not necessarily stable
Ornstein-Uhlenbeck processes stable process drift coefficient matrix estimation consistency asymptotic efficiency
2009/9/16
In this paper, we investigate the consistency and asymptotic efficiency of an estimator of the drift matrix, $F$, of Ornstein-Uhlenbeck processes that are not necessarily stable. We consider all the c...
Simulation of Snow Drift and the Effects of Snow Particles on Wind
Snow Drift Snow Particles Wind
2009/9/4
Coupled equations between wind and saltating particles are presented for a stable wind blowing over an infinite plane bed and the equations are solved for a simplified particle-bed impact process. The...
Equidistant sampling for the maximum of a Brownian motion with drift on a finite horizon
Gaussian random walk maximum Riemann zeta function Euler-Maclaurin summation equidistant sampling of Brownian motion finite horizon
2009/4/29
A Brownian motion observed at equidistant sampling points renders a random walk with normally distributed increments. For the difference between the expected maximum of the Brownian mo- tion and its s...
Invariant measures for stochastic Cauchy problems with asymptotically unstable drift semigroup
Invariantmeasures stochastic evolution equationsin Hilbert spaces
2009/4/22
We investigate existence and permanence properties of invariant measures for abstract stochastic Cauchy problems of the form
dU(t) = (AU(t) + f) dt + B dWH(t),
governed by the generator A of...