Symmetric and Asymmetric Diffusions through Age-Varying Mixed-Species Stand Parameters

نویسندگان

چکیده

(1) Background: This paper deals with unevenly aged, whole-stand models from mixed-effect parameters diffusion processes and Voronoi diagram points of view concentrates on the mixed-species stands in Lithuania. We focus potentially available areas to tree positions as measure competition effect individual trees diameter at breast height relate their evolution through time. (2) Methods: consider a bivariate hybrid stochastic differential equation for parameterization polygon area age ensure proper description link between them during (time) span forest stand. In this study, was used mathematical tool quantitative characterization inter-tree competition. (3) Results: The newly derived model considers correlated observations, diameter, arising particular stand enables defining equations calculating polygon-area, stand-density predictions forecasts. (4) Conclusions: From statistical point view, developed produced acceptable measures All results were implemented Maple computer algebra system.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Drift Transformations of Symmetric Diffusions, and Duality

Starting with a symmetric Markov diffusion process X (with symmetry measure m and L(m) infinitesimal generator A) and a suitable core C for the Dirichlet form of X, we describe a class of derivations defined on C. Associated with each such derivation B is a drift transformation of X, obtained through Girsanov’s theorem. The transformed process X is typically non-symmetric, but we are able to sh...

متن کامل

Photosynthetic Characteristics of Five Hardwood Species in a Mixed Stand’

In 1998, photosyWhesis (Pn) was measunxl on ch&barfc oak, green ash. swemp chestnut oak, swatgum, and wa@r hickory in a mixed stand established in Febfuaty 1994. Baclcld on the apparent quantum yield Obtained from light response u~rves. cherrybark oak had the lowest Pn in August whetus crwsctbgum. 9men esh and w&r hickory we18 squally act&a in Pn. Daily August Pn of swaa@um and grean ash pa&cad...

متن کامل

The effects of symmetric and asymmetric foot placements on sit-to-stand joint moments.

The purpose of this study was to determine the effects of symmetric and asymmetric foot placements on joint moments during sit-to-stand movements. Three symmetric (foot-neutral, foot-back, and foot-intermediate) and three asymmetric foot placements (preferred stagger, nonpreferred stagger, and intermediate stagger) were tested. Standard (46 cm) and low (41 cm) seat heights were chosen to repres...

متن کامل

On the Stability of Systems with Mixed Time-varying Parameters

The well-known scaled small gain condition guarantees stability for a linear time invariant system subject to bounded complex nonlinear and/or time-varying perturbations. A polynomial time computable condition is derived that can be substantially less conservative for gain scheduled and other multivariable systems with repeated real time-varying parameters. The proof is a generalization of the ...

متن کامل

Symmetric and Asymmetric Rounding

If rounded data are used in estimating moments and regression coffiecients, the estimates are typically more or less biased. The purpose of the paper is to study the bias inducing effect of rounding, which is also seen when population moments intstead of their estimates are considered. Under appropriate conditions this effect can be approximately specified by versions of Sheppard’s correction f...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Symmetry

سال: 2021

ISSN: ['0865-4824', '2226-1877']

DOI: https://doi.org/10.3390/sym13081457