Abstract The notion of the Urysohn d -width measures to what extent a metric space can be approximated by -dimensional simplicial complex. We investigate how local width bounds on Riemannian manifold affect its global width. bound 1-width in terms first homology and supremal unit balls. Answering question Larry Guth, we give examples n -manifolds considerable <m:math xmlns:m="http://www.w3.org/...

The main purpose of this paper is to introduce a boundary layer analysis for the fluid flow andheat transfer characteristics of an incompressible nanofluid flowing over a permeable isothermalsurface moving continuously. The resulting system of non-linear ordinary differential equations issolved numerically using the fifth–order Runge–Kutta method with shooting techniques usingMatlab and Maple s...

the objective of the current study was to estimate the genetic parameters for body weight traits at different ages in iran-black sheep. data collected during a 24-year period (1984-2008) on body weight were used to model the growth trajectory and estimate genetic parameters. studied traits were birth weight (bw), weaning weight at 3 months of age (ww), 6 months weight (6mw), 9 months weight (9m...

crop simulation models are increasingly used in agriculture. these models help in saving time and expenses. the objective of this study was to evaluate cropsyst model in predicting development, growth and yield of wheat cultivars from golestan province. to do this, experimental data from different experiments were gathered for kohdasht, shiroodi, tajan and zagros. model performance in simulatin...

Selecting appropriate initial values is critical for parameter estimation in nonlinear photosynthetic light response models. Failed convergence often occurs due to wrongly selected initial values when using currently available methods, especially the kind of local optimization. There are no reliable methods that can resolve the conundrum of selecting appropriate initial values. After comparing ...

We estimate the increase in minimum value for a decision that is robust to parameter perturbations as compared of nominal nonconvex problem. The estimates rely on expressions subgradients and local Lipschitz moduli min-value functions require only solution Across 54 mixed-integer optimization models, median error estimating 12%. results inform analysts about possibility obtaining cost-effective...