[1] Shenzhen Polytech Univ, Inst Ultrason Technol, Shenzhen, Peoples R China
[2] Pakistan Inst Engn & Technol, Mech Engn Dept, Multan, Pakistan
[3] United Arab Emirates Univ, Al Ain, U Arab Emirates
[4] Natl Transmiss & Despatch Co Ltd, Islamabad, Pakistan
[5] Omega Aviat Ltd, Leicester, England
[6] Africa New Energies Ltd, London, England
[7] Shenzhen Polytech Univ, Inst Ultrason Technol, Shenzhen 518055, Peoples R China