نتایج جستجو برای: k out of n sub systems
تعداد نتایج: 21408122 فیلتر نتایج به سال:
In this paper we study some monotone behavior of the residual (past) entropy of order . We prove that, under some relation between the hazard rates (reversed hazard rates) of two distributions functions F and G, when the residual (past) entropy of order of F is decreasing (increasing) then the residual (past) entropy of G is decreasing (increasing). Using this, several conclusions regarding mo...
In this research, IR and frontier molecular orbital (FMO) computations were employed for investigating the performance of B12N12 as a novel recognition element for fabrication of quetiapine thermal and electrochemical sensors. All of the computations were done by density functional theory method in the B3LYP/6-31G(d) level of theory and in the aqueous ph...
in this project, some new polyaspartimides, (pas)s, have been synthesized form michael addition reaction between new synthetic bismaleimide (bmi) and some aromatic diamines. a characteristic property of this polyaspartimides is a pendent carboxylic group, which introduced to these polymers from new bismaleimide. bismaleimides (bmi) is one of the interesting compounds, which can be self-polymeri...
to evaluate the effects of fertilizing and deficit irrigation regimes on some chemical properties of soil and plant, an experiment was conducted during 2007 and 2008 growing seasons. experimental design was a split plot based on a randomized complete block design with four replications. the treatments consisted of three deficit irrigation regimes (main plots) and six soil fertilizing systems (s...
In the present study, textural and structural characterizations of chitosan bead for immobilization of alpha amylase were studied in detail by N2 adsorption–desorption, Microspore Analysis (MP), Barrett–Joyner–Halenda (BJH) plots and Field Emission Scanning Electron Microscope (FESEM) observations. Pore structure observation revealed chemical activation of chitosan bead by glutaralde...
Microporous hydroxy-sodalite zeolite membranes with different morphologies were synthesized via secondary growth technique with vacuum seeding on tubular α-Al2O3 supports at two different synthesis conditions (i.e. two different routes). Microstructures of the synthesized membranes were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) and si...
مطالعه کمپلکس فلزات تالیم و پتاسیم با ترکیب آلی متوترکسات با استفاده از روشهای آزمایشگاهی UV, FT-IR
در این تحقیق برهمکنش های یونهای فلزی ((Tl+ - K+ با متوتروکسات مورد بررسی قرارگرفته است. ازطیف سنجی زیرقرمز (FT-IR) برای تعیین محلهای اتصال فلز به لیگاندها و از طیف سنجی UV برای تعیین مقدارثابت پیوند استفاده شده است. مقدار ثابت پیوند K، برای کمپلکسهای یاد شده که نشان دهنده توانایی پیوند بین فلز و لیگاند میباشد، به ترتیب برابر است با: K (MTX-K) =2.54 × 104 M-1<...
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