Using method of least squares and the theory of curve drawing, the paper analyses the characters of commercial banks’ anticipated contribution curve, and gets the customer anticipated contribution econometric model in the customer’s life period.
In this paper, first the concept and different calculation methods about costs of life period, which consists of static and dynamic state counting methods of total costs and annually average costs are expounded.
When the adult of female was treated with fenpropathrin 7.5 mg/L and 15 mg/L, the life period of adult, the oviposition quantity per and hatchability of eggs of the mites were 24.7% and 23.7%, 17.1% and9.21%, 174.2% and 141% over that in CK respectively.
The results showed that the life period of adult, oviposition number of female and hatchability of egg of T. urticae increased by 19.4% and 14.0%, 41.1% and 36.8%, 159.1 % and 107.3 % compared with that of the CK respectively after the prenymph stage was treated with cyhalothrin 10 mg/L and 20 mg/L.
When the granularity of catalyst is 40—60 mesh,the mass contents of Cr_2O_3 and K_2O are 4.17~0_0 and 4.9~0_0 respectively, and the life period at a time of catalyst prepared is 20 h. The yield of thiophene is 53.7~0_0, higher than the yield of foreign product which is 42~0_0.
The half-life period of a probe at room temperature can serve as an additional characteristic of the acidity of the surface.
The amounts of Gqα and G∞ as well as the Gα subunits were found to be higher in the earlier life period compared to the adult.
Whether puberty is best characterized as a social construction or as a physical event and whether early adolescence is best considered a transitional or distinct life period are discussed.
It is found that the crystallinity of the as-grown tin oxide thin films produced by single deposition degrades with shelf-life period and an amorphous phase is developed under environmental conditions.
Half-life period was considerably reduced at 80% MHC.