نتایج جستجو برای: economic and mathematical modeling

تعداد نتایج: 16946019  

Journal: :Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 2011
LaRee Tracy Holly D Gaff Colleen Burgess Samba Sow Patti E Gravitt J Kathleen Tracy

Human papillomavirus vaccines have potential to reduce cervical cancer incidence and mortality; however, cultural and economic barriers may hinder success in developing countries. We assessed impact of a single vaccine campaign in Mali with use of mathematical modeling. Our model shows that decreases in the prevalence of Human papillomavirus infection are proportional to achieved vaccination co...

2008
Hodjat Ghadimi

States and even local governments are increasingly realizing the need for long-term sustainable energy-environment planning as an integral part of their economic development program. These sub-national units are progressively playing a more active role in advancing policies for the reliability, environmental sustainability, and exploring the economic development impact of their energy resources...

This study provides a multidimensional analysis of sustainable socio-economic development and its challenges in the rural areas of Ukraine. The methodology of realization of sustainable development’s conceptual provisions was created. The advantages of using indicative assessment at the regional level were justified. The methodical approach how to define the indicators of sustainable developmen...

Impairments in cell migration processes may cause various diseases, among which cancer cell metastasis, tumor angiogenesis, and the disability of immune cells to infiltrate into tumors are prominent ones. Mathematical modeling has been widely used to analyze the cell migration process. Cell migration is a complicated process and requires statistical methods such as random walk for proper analys...

R. Ebrahimi, S. Solhjoo

Determination of critical points on hot stress-strain curve of metals is crucial in thermo-mechanical processes design. In this investigation a mathematical modeling is given to illustrate the behavior of metal during hot deformation processes such as hot rolling. The critical strain for the onset of dynamic recrystallization has been obtained as a function of strain at the maximum stress. In a...

Journal: :civil engineering infrastructures journal 0
gholamreza abdollahzadeh assistant professor, department of civil engineering, babol university of technology, babol, iran farid ghobadi m.sc. student, department of civil engineering, shomal university of amol, amol, iran.

some considerable damage to steel structures during the hyogo-ken nanbu earthquake occurred. among them, many exposed-type column bases failed in several consistent patterns, such as brittle base plate fracture, excessive bolt elongation, unexpected early bolt failure, and inferior construction work, etc. the lessons from these phenomena led to the need for improved understanding of column base...

Journal: :journal of agricultural science and technology 2014
h. darvishi m. h. khoshtaghaza s. minaee

the present study investigated the influence of air temperature and velocity on the drying kinetics and specific energy consumption during fluidized bed drying of soybean at 80, 100, 120 and 140ºc and airflow rates of 1.8, 3.1 and 4.5 m s-1. six mathematical models for describing the fluidized bed drying behavior were investigated. the value of the drying rate coefficient (k) increased with inc...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یاسوج - دانشکده علوم 1391

in this investigation the effect of external field on the electron density of nanostructures of cds, cdse, cdte, gaas and polymeric structure of three, four, five and six units of cds as a kind of nanosolar cells has been studied theoretically. as modeling this system in nanodimension, molecular structures has used. specific properties of molecular structures permit us to consider different sym...

Journal: :تحقیقات مکانیک کاربردی 0

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Journal: :journal of agricultural science and technology 2013
d. chen m. li x. zhu

the objective of this research was to study the drying characteristics of powderedagricultural residues. drying experiments of wheat straw (triticum aestivum) wereconducted at four temperatures of 50, 60, 70, and 80°c by a thermogravimetric analyzer.drying temperature had a significant effect on the moisture change and drying time.there was no constant drying rate period, but a short rising rat...

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