نتایج جستجو برای: re
تعداد نتایج: 175470 فیلتر نتایج به سال:
Molybdenite is the major source of Re in the Earth’s crust. Mineralogical data, chemical analyses and scanning electron microscopy techniques have been used in this study to document Re behavior in molybdenite, affected by hypogene and near-surface processes. XRD study of molybdenite samples indicate that the molybdenites are of the 2H polytype.The patterns of rhenium distribution in molybden...
this paper presents a new control structure to reduce torque ripple in switched reluctance motor. although srm possesses many advantages in motor structure, it suers from large torque ripple that causes some problems such as vibration and acoustic noise. in this paper another control loop is added and torque ripple is de ned as an objective function. by using fuzzy sliding mode strategy, the dc...
background: surface microhardness is a physical property which access the effect of chemical and physical agents on hard tissues of teeth, and a useful way to examine the resistance of fluoride treated enamel against caries. the purpose of this study was to evaluate microhardness of enamel following ph-cycling through demineralization and remineralization using suspensions of dentifrices with d...
Background: The Rosemary extract (RE) possesses various antioxidant, cytoprotective and cognition-improving bioactivities. In this study, we postulated which doses of RE have a more effect on the hippocampus of middle-aged rats. Methods : In this experimental study, thirty-two middle-aged male Wistar rats were fed by different doses (50,100 and 200 mg/kg/day) of RE (containing 40% carnosic ...
In this report, we consider retinal detachment in the eye, which happens when the retina comes away from the choroid. This condition is often treated by removing the vitreous humour from the eye (vitrectomy) and spot-welding the retina back on to the choroid. After this, the vitreous body is refilled with saline or silicone oil. The vitreous humour is a viscoelastic material, with a very high e...
0167-8655/$ see front matter 2009 Published by doi:10.1016/j.patrec.2009.12.002 * Corresponding author. Tel.: +34 687291957; fax: E-mail addresses: [email protected] (S. Escalera), [email protected] (P. Radeva). A standard way to deal with multi-class categorization problems is by the combination of binary classifiers in a pairwise voting procedure. Recently, this classical approach has been f...
برای کلاس (g(? متشکل از توابع تحلیلی تک ارز نرمالیزه بردیسک واحد u هدف تعین نامساوی ضرایب می باشد. این رده از توابع در نامساوی خاصی بصورت re{1+zf(z)/f(z)} <1+?/2 که در آن ?<1>. می باشد صدق می کنند.
One of the potential bene ts of formal methods is that they o er the possibility of reducing the costs of testing. A speci cation acts as both the benchmark against which any implementation is tested, and also as the means by which tests are generated. There has therefore been interest in developing test generation techniques from formal speci cations, and a number of di erent methods have been...
One of the potential beneets of formal methods is that they ooer the possibility of reducing the costs of testing. A speciication acts as both the benchmark against which any implementation is tested, and also as the means by which tests are generated. There has therefore been interest in developing test generation techniques from formal spec-iications, and a number of diierent methods have bee...
: در این پایان نامه ابتدا به مفاهیم اولیه ابررسانایی و سپس به خواص و ساختار ابررساناهای دمای بالا پرداخته شده است. افت وخیزهای ابررسانایی و رسانایی الکتریکی اضافی ناشی از افت وخیزها، عوامل اصلی موثر در تغییر رسانایی، مدل ها و روابط مربوط به آن بررسی شده اند. روش ساخت ترکیب بس بلور re1-2xcaxmxba2cu3o7-? با re=nd,y و m=pr,th در بازه 15/0? x ?00/0 به طورمختصر بیان شده است. رسانایی الکتریکی اضافی ن...
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