本文讨论了分配型动态生产函数的理论及其应用(Distribution Dynamic Production Function,简称D-D生产函数)。D-D生产函数具有如下特点:首先,D-D生产函数是从分配角度计算产出的,它不仅考虑了固定资产、流动资产和劳动力,还考虑了净产...本文讨论了分配型动态生产函数的理论及其应用(Distribution Dynamic Production Function,简称D-D生产函数)。D-D生产函数具有如下特点:首先,D-D生产函数是从分配角度计算产出的,它不仅考虑了固定资产、流动资产和劳动力,还考虑了净产值、利润、税金和折旧等因素。第二,D-D生产函数可由一组动态非线性联立方程组表示。第三,D-D生产函数的系数具有明确的经济意义。展开更多
In the work one-productive model of economic dynamics the labor-force involved in production is investigated the case when or function with constant elasticity of substitution （CES） is studied. is considered. The de...In the work one-productive model of economic dynamics the labor-force involved in production is investigated the case when or function with constant elasticity of substitution （CES） is studied. is considered. The dependence of the consumption volume on production function coincides with the Cobb-Douglas function展开更多
Segmental perforation is widely used for horizontal wells. However,the flow of fluid in porous media is a complex problem. Using the Fourier transform,principle of potential superposition,trigonometric function transf...Segmental perforation is widely used for horizontal wells. However,the flow of fluid in porous media is a complex problem. Using the Fourier transform,principle of potential superposition,trigonometric function transform,asymptotic analyses,a pressure solution of a pseudo steady-state flow model in 3D circular-boxed media has been established. Comparing with the productivity of vertical wells,an equivalence radius model can be obtained. Based on the model,a method of evaluating the productivity of segmental perforation horizontal well is presented by means of principle of superposition. It shows that the equivalence radius is different for various positions of horizontal wells; the output of both ends of horizontal wells is greater than the others under the same length of perforation interval; it is more important to obtain high productivity by increasing the length of perforation interval than enlarging the spacing between perforation intervals. The result of this research can be used to ascertain the yield of each perforated interval.展开更多
文摘本文讨论了分配型动态生产函数的理论及其应用(Distribution Dynamic Production Function,简称D-D生产函数)。D-D生产函数具有如下特点:首先,D-D生产函数是从分配角度计算产出的,它不仅考虑了固定资产、流动资产和劳动力,还考虑了净产值、利润、税金和折旧等因素。第二,D-D生产函数可由一组动态非线性联立方程组表示。第三,D-D生产函数的系数具有明确的经济意义。
文摘In the work one-productive model of economic dynamics the labor-force involved in production is investigated the case when or function with constant elasticity of substitution （CES） is studied. is considered. The dependence of the consumption volume on production function coincides with the Cobb-Douglas function
基金supported by the China National 973 Program (Grant No. 2003CB214602)
文摘Segmental perforation is widely used for horizontal wells. However,the flow of fluid in porous media is a complex problem. Using the Fourier transform,principle of potential superposition,trigonometric function transform,asymptotic analyses,a pressure solution of a pseudo steady-state flow model in 3D circular-boxed media has been established. Comparing with the productivity of vertical wells,an equivalence radius model can be obtained. Based on the model,a method of evaluating the productivity of segmental perforation horizontal well is presented by means of principle of superposition. It shows that the equivalence radius is different for various positions of horizontal wells; the output of both ends of horizontal wells is greater than the others under the same length of perforation interval; it is more important to obtain high productivity by increasing the length of perforation interval than enlarging the spacing between perforation intervals. The result of this research can be used to ascertain the yield of each perforated interval.
