نتایج جستجو برای: phase system
تعداد نتایج: 2712096 فیلتر نتایج به سال:
the present work focuses on preparation and characterization of erythromycin loaded gelatin nanoparticles through nanoprecipitation method. the procedure consists of the increase of the aqueous gelatin solution to the non-solvent phase containing lutherol f127. three different measures of cross-linker and polymer concentration were also examined, and the optimum concentration was found. the mor...
Performance-based budgeting adds effectiveness and economizing factors to traditional aspects of budgeting. This system distinguishes efficiency from effectiveness. Efficiency emphasizes on the useful utilization of the resources concerned while effectiveness considers the performance. Categorization of operations in performance-based budgeting is in a way that goals are expressed more transpar...
از آنجا که چند شکلی تک نوکلئوتیدی (snp) مسئول 90 درصد تفاوت در بین گونه ها است، امروزه به میزان زیادی جهت بررسی تنوع زیستی در حیوانات استفاده می شود. به علت اینکهsnp ها دارای تنوع محدودی هستند بیشتر از هاپلوتیپ جهت بررسی این گونه تنوع ها استفاده می گردد. تعیین هاپلوتیپ در آزمایشگاه بسیار هزینه بر است، بنابراین در بیشتر موارد با استفاده از داده های ژنوتیپ، هاپلوتیپ را استنباط می کنند. الگوریتم ه...
guidance and control of aircraft in the landing phase imposes extra pilot work loads, hence application of automatic landing control systems is of great importance. in this study automatic landing control systems are introduced and an optimal landing control system is designed. the control system performance criteria are based on minimum control effort. the designed system is simulated for a tr...
A Two-phase model for configuring a cellular manufacturing system is proposed. In phase (I), for the first time, number of cells is considered as a decision variable. In phase (II), pursing two different objectives, one minimization of underload and the other, maximization of similarity of parts within a group, the design procedure is performed. As one cannot have these two objects together, a ...
In this work Bi1.6Pb0.4Sr1.9Ca2.1Cu3O10-y superconducting system (Bi2223) has been prepared by solid state reaction and the effect of nanoalumina additive on the phase formation and supercoducting properties have been investigated. XRD investigations show that addition of 0.2 wt% of nanoalumina on the superconducting system improved Bi-2223 phase formation . The results show that Jc increases...
monumental changes occurring on a daily basis have altered the world into a global village of expanding technology and shrinking geography in which preparing language learners for intercultural communication seems to be a sine qua non for modern language education. employing a cross-sectional design in its first phase, this study investigated the intercultural sensitivity and language proficien...
A study on the extraction of Acetaminophen (ACTP) which is also known as paracetamol, from aqueous solution by emulsion liquid membrane process using Taylor-Couette Column (TCC) was investigated. An ELM consists of three phase system which are the external, membrane and internal phases. The external phase containing the ACTP aqueous solution to be treated. Basically, the internal and membrane p...
Background: The dispersed phase volume fraction plays key role in oil-in-water emulsion stability by different mechanisms like partial flocculation, depletion flocculation and bridging flocculation. Since the mentioned mechanism is affected by emulsifier concentration presented in system, the major aim of this study was to investigate the effect of dispersed phase volume fraction on physical st...
This paper presents a compact model of a noisy phase-locked loop (PLL) for inclusion in a timedomain system simulation. The phase noise of the reference is modeled as a Wiener process, and the phase noise contribution of the voltage-controlled oscillator (VCO) is described as an Ornstein-Uhlenbeck process. The model is applied to phase error modeling for a 60 GHz OFDM system including correctio...
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