productivity ratio [‚prä‚dək′tiv·əd·ē ‚rā·shō] (petroleum engineering) The amount of damage or improvement to reservoir formation permeability adjacent to the borehole (due to invasion or reduction of drilling mud present, drilling-fluid filtrate water, swollen clay particles...
With the enhancement of environmental regulations, the output of clean industries has gradually increased, and its growth rate first declined and then increased. 2.4. The Impact of Environmental Regulations on Industrial Green Productivity Comparing the impact of factor allocation and output of different...