نتایج جستجو برای: empirical based models

تعداد نتایج: 3666051  

M. Khashei Z. Hajirahimi,

Despite several individual forecasting models that have been proposed in the literature, accurate forecasting is yet one of the major challenging problems facing decision makers in various fields, especially financial markets. This is the main reason that numerous researchers have been devoted to develop strategies to improve forecasting accuracy. One of the most well established and widely use...

Journal: :iranian journal of public health 0
m farhadian h mahjub a moghimbeigi j poorolajal gh sadri

background: the two most frequently diagnosed cancers among women worldwide are breast and cervical cancers. the objective of the present study was to classify the different countries based on the death rates from sex specific cancers. methods : in this cross-sectional study, we used dataset regarding death rate from breast, cervical, uterine, and ovarian cancers in 190 countries worldwide repo...

Journal: :international journal of transportation engineereing 2014
behnam amini mahmood javanmardi kouros mohammadian

residential location choice modeling is one of the areas in transportation planning that attempts to examine households location search behavior incorporating their trade-offs between housing quality, prices or rents, distance to work and other key factors. this brings up the need to come up with methods to logically allocate credible choice alternatives for individuals.this article attempts to...

In this work, a Genetic Algorithm boosted Least Square Support Vector Machine model by a set of linear equations instead of a quadratic program, which is improved version of Support Vector Machine model, was used for estimation of 98 pure compounds second virial coefficient. Compounds were classified to the different groups. Finest parameters were obtained by Genetic Algorithm method ...

 Despite the consensus on the importance of nominal rigidities, there is no general agreement among monetary economists regarding the most appropriate and consistent pricing model that must be used to assess the effects of monetary policies in the economy. Due to the lack of empirical evidence with relation to the pricing behavior of Iranian firms, there is no general agreement on how to introd...

Journal: :civil engineering infrastructures journal 0
farzad shahabian associate professor, civil engineering department, faculty of engineering, ferdowsi university of mashhad, mashhad, iran. sidi mohammed elachachi professor, university of bordeaux1, i2m-gce, 33405 talence, france. denys breysse professor, university of bordeaux1, i2m-gce, 33405 talence, france.

in this paper, a sensitivity analysis of artificial neural networks (nns) is presented and employed for estimating the patch load resistance of plate girders subjected to patch loading. to evaluate the accuracy of the proposed nn model, the results are compared with the previously proposed empirical models, so that we can estimate the resistance of plate girders subjected to patch loading. the ...

Journal: :چغندرقند 0
بهرام میرشکاری استادیار دانشگاه آزاد اسلامی واحد تبریز، دانشکده کشاورزی، گروه زراعت و اصلاح نباتات

in order to evaluate the efficiency of empirical competition models for simulation of sugar beet (beta vulgaris l.) yield at interference with redroot pigweed (amaranthus retroflexus l.), a factorial experiment based on randomized complete block design with three replications was carried out. factors were weed densities (d1=1, d2= 4, d3= 8, d4=12 and d5=16 plants m-1 of row) and relative time o...

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