id	keyword
esrj-112425	slope
esrj-112425	noise
esrj-112425	field
esrj-112425	method
esrj-112425	slope field
esrj-112425	wave
esrj-112425	local
esrj-112425	data
esrj-112425	plane
esrj-112425	transform
esrj-112425	figure
esrj-112425	hilbert
esrj-112425	equation
esrj-112425	filter