نتایج جستجو برای: ddf model

تعداد نتایج: 2104504  

With a brief review of the studies on the industry in Data Envelopment Analysis (DEA) framework, the present paper proposes inner and outer technologies when only some basic information is available about the technology. Furthermore, applying Linear Programming techniques, it also determines lower and upper bounds for directional distance function (DDF) measure, overall and allocative efficienc...

2014
Debasruti Chowdhury Dipankar Ghosh Mousumi Basu

Generation and propagation of Parabolic pulse through a designed and optimized silica based highly nonlinear dispersion decreasing fiber (HN-DDF) has been studied. It is seen that the proposed fiber can be treated as best choice for parabolic pulse generation with less input power requirement in comparison to standard normal dispersion fibers.

2015
Vincenza Notaro Lorena Liuzzo Gabriele Freni Goffredo La Loggia Paolo Reggiani Ezio Todini

Future projections provided by climate models suggest that the occurrence of extreme rainfall events will increase and this is evidence that the climate is changing. Because the design of urban drainage systems is based on the statistical analysis of past events, variations in the intensity and frequency of extreme rainfall represent a critical issue for the estimation of rainfall. For t...

Journal: :Sustainability 2021

This research adopts the meta Dynamic Directional Distance Functions (DDF) model in order to calculate environmental efficiency and governance of China’s industrial sector from 2010 2017 overall, sub-regional, sub-provincial perspectives discusses technical gaps regional pollution control reasons for ineffective governance. The results show that overall level is relatively high over this time p...

Journal: :Materials 2021

Four different finite element level-set (FE-LS) formulations are compared for the modeling of grain growth in context polycrystalline structures and, moreover, two them presented first time using anisotropic boundary (GB) energy and mobility. Mean values distributions four formulations. First, we present strong weak models crystallographic parameters used at mesoscopic scale. Second, some Grim ...

1996
R. W. Gebert H. Nicolai

An affine vertex operator construction at arbitrary level is presented which is based on a completely compactified chiral bosonic string whose momentum lattice is taken to be the (Minkowskian) affine weight lattice. This construction is manifestly physical in the sense of string theory, i.e., the vertex operators are functions of DDF “oscillators” and the Lorentz generators, both of which commu...

2016
Wen-Rong Sun

Dispersion varying fibres have applications in optical pulse compression techniques. We investigate Akhmediev breathers, Kuznetsov–Ma (KM) solitons and optical rogue waves in a dispersion varying optical fibre based on a variable-coefficient nonlinear Schrödinger equation. Analytical solutions in the forms of Akhmediev breathers, KM solitons and rogue waves up to the second order of that equati...

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