نتایج جستجو برای: response surfacemethodology

تعداد نتایج: 977314  

Journal: :iranian journal of applied language studies 2012
masoumeh akhondi faramarz aziz malayeri

this study investigated if different response formats (test methods) measure reading comprehension of expository text differently. the study was conducted with 48 semester 6 tesl students at a university in selangor, malaysia. these students received an expository passage having descriptive rhetorical structure followed by three response formats, namely, incomplete outline, graphic organizer, a...

Journal: :iranian journal of otorhinolaryngology 0
bahram jalaei department of audiology, faculty of rehabilitation, iran university of medical sciences, tehran, iran. mohd normani zakaria audiology program, school of health sciences, university sains malaysia, kelantan, malaysia. dinsuhaimi sidek department of otorhinolaryngology, school of medical sciences, university sains malaysia, kelantan, malaysia.

introduction: noonan syndrome (ns) is a heterogeneous genetic disease that affects many parts of the body. it was named after dr. jacqueline anne noonan, a paediatric cardiologist.case report: we report audiological tests and auditory brainstem response (abr) findings in a 5-year old malay boy with ns. despite showing the marked signs of ns, the child could only produce a few meaningful words. ...

Journal: :iranian journal of nuclear medicine 0
hojjat mahani radiation application research school, nuclear science and technology research institute, tehran, iran gholamreza raisali radiation application research school, nuclear science and technology research institute, tehran, iran alireza kamali-asl radiation medicine department, shahid beheshti university, tehran, iran mohammad reza ay research center for molecular and cellular imaging, tehran university of medical science, tehran, iran

introduction:it is well-recognized that collimator-detector response (cdr) is the main image blurring factor in spect.  in this research, we compensated the images for cdr in molecular spect by using stir reconstruction framework. methods: to assess resolution recovery capability of the stir, a phantom containing five point sources along with a micro derenzo phantom were investigated. influence...

Journal: :journal of structural engineering and geo-techniques 2012
a esfandiari

in this paper, a structural damage identification method (sdim) is developed for plate-like structures. this method is derived using dynamic equation of undamaged/damaged plate, in which local change in flexural rigidity is characterized utilizing a damage distribution function. the sdim requires to modal data in the intact state and frequency response of damage state where most of vibration ba...

Journal: :physical chemistry research 2015
vahid mahdavi hamid reza hasheminasab

vanadium phosphorus oxides (vpo) has been applied as a heterogeneous catalyst in gas phase oxidation reactions and its application is very limited in liquid phase. in this study a series of cobalt-doped vanadium phosphorus oxides (vpo-co) catalysts with different loading of co (0.01-1.0 mol ratio of co/v) were prepared. oxidation of benzyl alcohol was studied in the liquid phase over vpo and vp...

Journal: :international journal of nanoscience and nanotechnology 2015
e. maani miandoab f. tajaddodianfar h. nejat pishkenari h. m. ouakad

many of nonlinear systems in the field of engineering such as nano-resonator and atomic force microscope can be modeled based on duffing equation. analytical frequency response of this system helps us analyze different interesting nonlinear behaviors appearing in its response due to its rich dynamics. in this paper, the general form of duffing equation with cubic nonlinearity as well as paramet...

Journal: :international journal of nanoscience and nanotechnology 2013
r. ahmadi a. khodadadi darban

in this paper, size distribution of nano-bubbles was measured by the reliable and fast method of laserdiffraction technique. nano-bubbles were produced using a nano-bubble generator designed and madebased on hydrodynamic cavitation phenomenon in venturi tubes. a central composite design withresponse surface methodology was used to conduct a five factor, five level factorial experimental designo...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2012
amir heidari mansour shirvani

in this contribution, linearized dynamic model of cumulative mass fraction (cmf) of potassium nitrate-water seeded continues mixed suspension mixed product removal (cmsmpr) crystallizer is approximated by a simplified model in frequency domain. frequency domain model simplification is performed heuristically using the frequency response of the derived linearized models data. however, the cmf fr...

Journal: :molecular and biochemical diagnosis (journal) 2014
somayeh khatami ali mohammad ahadi hoda ayat fereshteh mardanian

background: miscarriage is one of the most common pregnancy complications for which various causes have been defined, such as genetic factors, infectious, metabolic, endocrine systemmal function and immune system undesired responses. the early development of embryo occurs in oviduct and uterine tube from which some factors such as growth factors, glyco-proteins and factors those stimulate devel...

Journal: :journal of agricultural science and technology 2015
a. r. abbasi b. mohammadi r. sarvestani f. mirataei

vicia sativa l., an annual winter growing leguminous plant, is a valuable source of protein and minerals for cattle. drought is one of the key stress factors that influence plant growth and development. in order to investigate common vetch physiological and molecular responses under normal irrigation (n) and two levels of drought stress [s1= 30% and s2= 10% field capacity (fc)], a greenhouse exp...

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