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تعداد نتایج: 8614478 فیلتر نتایج به سال:
abstract sensitive and precise voltammetric methods for the determination of trace amounts of furaldehydes, mainly as furfural (f) and 5-hydroxymethyl-2-furaldehyde (hmf), in waste waters and other matrices is described. determination of total furaldehyde at < ?g g-1 levels in alkaline buffered aqueous media was individually investigated. by the use of ordinary swv and adsorptive square wave ...
water crisis resource management originates from limited resources has made it essential to study the prioritization of traditional and modern methods of sustainable water resource management. the objective of such studies is to provide a list of prioritized traditional and modern methods of sustainable water resource management. this research aims to study rainwater harvesting method and qanat...
Surface Acoustic Wave (SAW) devices, using interdigital electrodes, play a key role in today’s telecommunication systems and are widely used as electronic filters, resonators, delay lines, convolvers or wireless identification systems (ID tags). During the last three decades, demands set by the expansion of the telecommunication industry and many applications in sensor have resulted in the intr...
In order to enhance in terms of accuracy and predict the modeling of the potential distribution of species, the integration of using principal components of environmental variables as input of maximum entropy (MaxEnt) has been proposed in this study. Principal components selected previously from the principal component analysis results performed in ArcGIS in the environmental variables was used...
In this study, a numerical model of the tangential tensioning stress distribution of a circular saw blade tensioned by multi-spot pressure was established using theoretical analysis, and the tangential tensioning stress distribution of the circular saw blade calculated by the model was shown to be true and reliable. The effect of yield strength of the circular saw blade on the distribution of t...
The 1990s saw the introduction of three European directives that aimed to harmonise medical device legislation within Union (EU) and these were given effect in United Kingdom (UK) by Medical Devices Regulations 2002 (Statutory Instrument 2002/618 [UK MDR 2002]). Dental professionals EU who manufactured custom-made devices required do so accordance with relevant requirements one directives, Coun...
In this study, we report a fully described modeling and simulation of a piezoelectric layered structure for surface acoustic wave (SAW) applications. SAW propagation characteristics were numerically investigated in ZnO/IDT/128° YX LiNbO3. The numerical analysis was conducted using Finite Element Method (FEM) in COMSOL Multiphysics 4.3b platform. The numerical results show that the electromechan...
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