نتایج جستجو برای: ergun model
تعداد نتایج: 2104350 فیلتر نتایج به سال:
The main objective of this research is stability determination of activated carbon adsorbent at fixed bed adsorption column for desulfurization of diesel fuel by mathematical modeling. This model is based on mass balances. Equations that are the outcome of mass balances are known as the second degree of partial differential equations, and they must be solved together simultaneously...
since its introduction in 1959, translation quality assessment (tqa) has been among the most addressed research topics in translation studies. during recent years, there has been a crucial increase on the study of tqa. various methods have come on scene. although these methods are based on scientific theories, most of them have remained at the level of theory. juliane house’s model is among tho...
Ecotourism is a promising solution for channeling tourism revenues to promote nature conservation and poverty alleviation. However, vulnerable social-ecological conditions may limit the effects of ecotourism in dry rangelands around world. This study implemented paired experimental design survey impacts Ergun grassland, one China’s most commended regions. Compared with livestock feeding busines...
a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...
Large amplitude parallel propagating electric field structures of nonlinear electron-acoustic waves are examined in an unmagnetized magnetosheath plasma. Based on the observations and simulations by Ergun et al. (2016), plasma side ion diffusion layer is modeled a 3-component adiabatic fluid dynamic consisting cold magnetospheric (MSP) electrons, background ions. Using Sagdeev pseudopotential t...
The concentrations of heavy metals (As, Cd, Cr, Cu, Hg, Ni, Pb and Zn) in 17 surface sediment samples from the Hailar River, upper source Ergun which is boundary river between China Russia, were analyzed. Traceability cause analysis carried out by correlation principal component analysis. results showed that Hg Cd sediments exceeded soil background values. Due to high biological toxicity factor...
Abstract Transnational feminist translation studies stand for activism, cooperation and solidarity in connecting thinking developed all parts of the world (Alvarez et al. 2014, Castro/Ergun 2017, Flotow/ Farahzad Flotow 2019). One important issues is wartime sexual violence, which focus this article, constitutes a feminist, transnational phenomenon. The account violence by female victims faces ...
پنل های خورشییدی دارای مشیه ه جریان -ولتاژ غیر خطی بوده و تنها در یک نقطه کار خاص، حداکثر توان را تولید می کنند. این نقطه بهینه توان با تغییر دما و شیدت نور تغییر می کند. روش های مهتلفی برای ردیابی نقطه حداکثر توان به صورت free model و based model معرفی شده است. این تحقیق روش جدیدی جهت بهبود عملکرد ردیابی نقطه حداکثر توان پنل های خورشیدی جدا از شبکه ارائه می دهد و الگوریتم روش پیشینهادی از دو...
run-out-table (rot) is located between last finishing stand and down coiler in a hot strip mill. as the hot steel strip passes from rot, water jets impact on it from top and bottom and strip temperature decreases approximately from 800-950 °c to 500-750°c. the temperature history that strip experience while passing through rot affects significantly the metallurgical and mechanical properties, s...
the main purpose of this research was to:1.develop a coking model for thermal cracking of naphtha.2.study coke inhibition methods using different coke inhibitors.developing a coking model in naphtha cracking reactors requires a suitable model of the thermal cracking reactor based on a reliable kinetic model.to obtain reliable results all these models shall be solved simultaneously.for this pu...
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