Search results for " convergence."

Approximation of Baskakov type Pólya–Durrmeyer operators

2017

In the present paper we propose the Durrmeyer type modification of Baskakov operators based on inverse Polya-Eggenberger distribution. First we estimate a recurrence relation by using hypergeometric series. We give a global approximation theorem in terms of second order modulus of continuity, a direct approximation theorem by means of the Ditzian-Totik modulus of smoothness and a Voronovskaja type theorem. Some approximation results in weighted space are obtained. Also, we show the rate of convergence of these operators to certain functions by illustrative graphics using the Maple algorithms.

Applications and numerical convergence of the partial inverse method

2006

In 1983, J.E. Spingarn introduced what he called the Partial Inverse Method in the framework of Mathematical Programming. Since his initial articles, numerous applications have been given in various fields including Lagrangian multipliers methods, location theory, convex feasibility problems, analysis of data, economic equilibrium problems. In a first part of this paper we give a survey of these applications. Then by means of optimization problems relevant to location theory such as single and multifacility minimisum or minimax location problems, we examine the main advantages of the algorithm and we point out its drawbacks mainly concerning the rate of convergence. We study how different p…

Resilience and Convergence: Short vs.Long-Run Regional Effects of Economic Crises and Macroeconomic Policies

2020

Before the outbreak of the Great Recession, considerable attention was devoted to what makes a region successful, and why some regions grow faster than others, but researchers often overlooked how regions react to shocks and why this happens in a heterogeneous way. Furthermore, the classic literature on regional inequalities has mainly focused on the longterm relationship between economic growth and regional disparities and on the role of labor mobility, sometimes also as a mechanism of adjustment to labor demand idiosyncratic shocks. This literature trend has reversed since 2008, when investigation of the heterogeneous impact of shocks across areas became prominent in regional studies beca…

Numerical modeling of eastern Tibetan-type margin: Influences of surface processes, lithospheric structure and crustal rheology

2013

The eastern Tibetan margin is characterized by a steep topographic gradient and remarkably lateral variations in crustal/lithospheric structure and thermal state. GPS measurements show that the surface convergence rate in this area is strikingly low. How can such a mountain range grow without significant upper crustal shortening? In order to investigate the formation mechanism of the eastern Tibetan-type margins, we conducted 2D numerical simulations based on finite difference and marker-in-cell techniques. The numerical models were constrained with geological and geophysical observations in the eastern Tibetan margin. Several major parameters responsible for topography building, such as th…

Neoclassical Convergence Versus Technological Catch-Up : A Contribution for Reaching a Consensus.

2004

http://www.businessperspectives.org/files/ppm/PPM_EN_2004_03pp15_42.pdf; International audience; New macro empirical evidence is provided to assess the relative importance of object andidea gaps in explaining the world income distribution dynamics over a benchmark period of 1960-1985. Results are then extended through 1995. Formal statistical hypothesis tests allow us to discriminatebetween two competing growth models: (i) the standard neoclassical growth model similarto that employed by Mankiw, Romer, and Weil (1992), and (ii) an endogenous growth modelclosely related to the Nelson and Phelps' approach (1966) that emphasizes the importance of technologytransfer in addition to factor accumu…

Approximation Properties of the Modified Stancu Operators

2017

ABSTRACTIn this article we construct a sequence of Stancu-type operators that are based on a function τ. This function is any function on [0,1] continuously differentiable ∞ times, such that τ(0) =...

Yet Another New Variant of Szász–Mirakyan Operator

2021

In this paper, we construct a new variant of the classical Szász–Mirakyan operators, Mn, which fixes the functions 1 and eax,x≥0,a∈R. For these operators, we provide a quantitative Voronovskaya-type result. The uniform weighted convergence of Mn and a direct quantitative estimate are obtained. The symmetry of the properties of the classical Szász–Mirakyan operator and of the properties of the new sequence is investigated. Our results improve and extend similar ones on this topic, established in the last decade by many authors.

Unknown order process emulation

2002

Approaches the emulation problem using feedforward neural networks of single input single output (SISO) processes, applying a backpropagation method with a higher convergence rate. In this kind of application, difficult problems appear when the system's order is a priori unknown. A search through the SISO processes space is proposed, aiming to find a favorable neural emulator over the training examples set.

The competitive development of flowers and ornamental firms through the use of web-marketing strategies: a survey in the convergence objective region…

2011

Strategies for conservation of a minority language. Between convergence and hybridization

2019

The Arbëresh linguistic varieties constitute a rich field of investigation for interesting phenomena of language attrition and contact. Because of the ancient and prolonged situation of bilingualism between Albanian and Italo-Romance varieties an interesting set of phenomena of code-switching, loan, convergence and hybridization has presented itself. This research concerns the Arbëresh linguistic minority of Greci, a small town in the Campanian region of southern Italy. Within Arbëria, the widespread archipelago of Albanian-speaking communities which occupies a vast territory in southern Italy, the preservation of Arbëresh presents very different sociolinguistic situations. Inside Arbëria G…