نتایج جستجو برای: Synthetic Method
تعداد نتایج: 1745703 فیلتر نتایج به سال:
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...
in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...
By interrupting the traditional approach to the distinctiveness of the order of knowledge and the order of nature (which was the procedure of many philosophers like Aristotle, and his scholastic disciples, more especially of Thomas Aquinas and even Descartes and Cartesian), and acquiring a unified science, Spinoza changes the customary order of philosophizing and begins his famous book, Ethics,...
The synthetic control method (SCM) is a popular approach for estimating the impact of treatment on single unit in panel data settings. “synthetic control” weighted average units that balances treated unit’s pretreatment outcomes and other covariates as closely possible. A critical feature original proposal to use SCM only when fit excellent. We propose Augmented an extension settings where such...
estimation of pigment magnitudes in synthetic leather by using scanner and artificial neural network
in the present work the magnitudes of pigments in the synthetic leather, were measured by means of scanner. initially synthetic leather samples pigmented by three different pigments of yellow, blue and red colors were prepared. then the pigmented samples were scanned, and the values of rgb of images were calculated. the artificial neural network (ann) method used to make relation between rgb va...
background: mental disorders may lead to several complications in adolescents’ people whose compensation is very difficult and sometime impossible. they are prone to emotional problems. therefore, knowing prevalence of diseases and valid statistical technique is necessary to plan for prevention and control of diseases. methods: in this cross-sectional study; direct, synthetic, and post-stratifi...
coregistration of optical and radar imageries is a major pre-processing step in many remote sensing applications including change detection and interferometric processing. specially, the coregistration faced more difficulties in radar imageries due to the high noise level and intense spatial-temporal decorrelation. hence, non-automatic coregistration methods are much more time consuming and ine...
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