aclm/("fuel cell" or "fuel cells") AND aclm/model$

77

12

641.6%

aclm/("fuel cell" or "fuel cells") NOT aclm/model$ AND spec/model$

535

398

134.4%

NOT aclm/("fuel cell" or "fuel cells") AND aclm/model$ AND spec/("fuel cell" or "fuel cells")

23

0

Infinity%

Pubs1	Pats1	Pubs2	Pats2	Permutation	Publications	Patents	Ratio
				aclm/("fuel cell" or "fuel cells") AND aclm/model$	77	12	641.6%
				aclm/("fuel cell" or "fuel cells") NOT aclm/model$ AND spec/model$	535	398	134.4%
				NOT aclm/("fuel cell" or "fuel cells") AND aclm/model$ AND spec/("fuel cell" or "fuel cells")	23	0	Infinity%