نتایج جستجو برای: parameter weibull distribution at the second stage
تعداد نتایج: 16452030 فیلتر نتایج به سال:
the present study is an attempt to investigate the potential impact of inspirational quotes on improving english abstract vocabulary recall. to achieve this goal, a multiple choice language proficiency test of 60 items including vocabulary and grammar component was administered to a sample of 63 second-semester male and female students whose age ranged between 17 to 22 and they were studying en...
The reliability of a component depends on the stress conditions operating environment, which are uncertainty and should be modeled as random. This article deals with estimation stress-strength parameter Weibull-Rayleigh distribution. Let X Y two independent random variables, where follow maximum likelihood estimator approximate obtained. Other properties distributions derived. Two real data app...
on this project we try to calculated power of hydrogen on dycarbonil compound in different ways ; the first way is shoster way , for sain power of hydrogen notice the different power between central conforms on it and main conform that’s didn’t have hydrogen joint . or in other way different of energy between open and close form. second way, is average way? this is for way that studied conf...
the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...
all analytical methods are generally based on the measurement of a parameter or parameters which are somehow related to the concentration of the species.an ideal analytical method is one in which the concentration of a species can be measured to a high degree precision and accuracy and with a high sensitivity. unfortunately finding such a method is very difficult or sometimes even impossible.in...
a field experiment was conducted to study the spatial relationships between weed seed bank and population and their distribution models in sugar beet crop (beta vulgaris) in 2009 at motahari agricultural research station of karaj. sampling from seed bank before sugar beet drilling and weed population in three stages during the growing season were done using square (50*50 cm) and rectangle (25*...
We consider the defect size distributions at different stages of damage evolution, from the initial stage of defect nucleation and accumulation, through the intermediate stage of defect propagation and into the final stage leading to the appearance of the major crack. Critical events considered in this context are related to (a) the formation of microcracks exceeding the structural threshold as...
In the last years, use of wind turbines for power generation has increase due to advance's technology used and stable cost. this paper, low investment in desert regions Fezouata, Ouijjane, El Ouatia, Taroudannt Morocco, we have considered resources as an ideal option. Using meteorological statistics, Weibull's distribution function was able estimate potential four various each site with nominal...
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