(1) Cross rate is the rate two currencies without exchange rate calculated from two exchange rates which are related to the same currency.

(2) What is the equivalent of US$100 in RMB at the current cross rate?

(3) Noisy speech signals were decomposed into a set of intrinsic mode functions (IMFs) using EMD. The average instantaneous frequencies of IMFs were estimated by their short time zero cross rate.

(4) The experimental results show that the fitting effect is better when the mutation rate is the same value 0.05, cross rate decreasing and population increasing.

(5) Five cross combinations by three wild beets, Beta macrocarpa Guss. , Beta patula Ait. , Beta maritima L. and sugarbeet got the hybrids, the cross rate were 3.5%-14.3%.