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Bipul Das,Swarup Bag,Sukhomay Pal 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.5
Providing solutions towards the improvisation of welding technologies is the recent trend in the Friction stir welding (FSW) process. We present a monitoring approach for ultimate tensile strength of the friction stir welded joints based on information extracted from process signals through implementing fractal theory. Higuchi and Katz algorithms were executed on current and tool rotational speed signals acquired during friction stir welding to estimate fractal dimensions. Estimated fractal dimensions when correlated with the ultimate tensile strength of the joints deliver an increasing trend with the increase in joint strength. It is observed that dynamicity of the system strengthens the weld joint, i.e., the greater the fractal dimension, the better will be the quality of the weld. Characterization of signals by fractal theory indicates that the single-valued indicator can be an alternative for effective monitoring of the friction stir welding process.
BRÜCK CONJECTURE AND A LINEAR DIFFERENTIAL POLYNOMIAL
Lahiri, Indrajit,Pal, Bipul Korean Mathematical Society 2018 대한수학회논문집 Vol.33 No.3
In the paper we consider the uniqueness of a meromorphic function and a linear differential polynomial when they share a small function.
Lahiri, Indrajit,Pal, Bipul Korean Mathematical Society 2017 대한수학회보 Vol.54 No.3
In this paper we study the uniqueness question of meromorphic functions whose certain differential polynomials share a small function.
Indrajit Lahiri,Bipul Pal 대한수학회 2017 대한수학회보 Vol.54 No.3
In this paper we study the uniqueness question of meromorphic functions whose certain differential polynomials share a small function.