کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
295362 511541 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
New analysis and extensions of split-spectrum processing algorithms
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
New analysis and extensions of split-spectrum processing algorithms
چکیده انگلیسی

In this paper we compare the performances of different variants of split-spectrum algorithms and propose some new extensions based on the use of variable bandwidth filters equally spaced in frequency and energy gain equalized. Signal-to-Noise Ratio Gain and Flaw-to-Clutter Ratio Gain factors were selected as the figures of merit to make the comparisons among the different methods. We considered simulated ultrasonic signals using both stationary and non-stationary models for the grain noise, and real scans obtained in laboratory from low dispersive (aluminum) and high dispersive (cement) materials. Frequency Multiplication (FM) recombination method is revealed as the best option when combined with the new extensions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NDT & E International - Volume 45, Issue 1, January 2012, Pages 141–147
نویسندگان
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