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. Author manuscript; available in PMC: 2015 Apr 2.
Published in final edited form as: Biometrics. 2014 Oct 18;71(1):247–257. doi: 10.1111/biom.12236
ϕlX(t) ϕmU(t) ϕhW(t)
sin(2πt) 12 l
cos(2πt) sin(6πt) 3(2t1)
sin(4πt) cos(6πt) 5(6t26t+1)
cos(4πt) sin(8πt) 5(20t330t2+12t1)