Elovicb, two-constant, parabolic diffusion, exponential, second-order, first-order and zero-order equations were used to describe the kinetic characteristics of potassium desorption from six paddy soils df Zhejiang Pr...Elovicb, two-constant, parabolic diffusion, exponential, second-order, first-order and zero-order equations were used to describe the kinetic characteristics of potassium desorption from six paddy soils df Zhejiang Province in a constant electric field (44.4 V/ cm) of EUF. Results showed that the second-order and Elovich equations could describe the potassium desorption kinetics best, as evidenced by the highest correlation coefficients (r) and the lowest standard errors (SE). The first-order, two-constant and parabolic diffusion equations also described the K desorption kinetics well, as showed by the relatively high correlation coefficients and relatively low standard errors. The zero-order equation did not describe the K desorption satisfactorily with a relatively low correlation coefficient and relatively high standard error. However, the exponential equation could not be used to describe the K desorption kinetics, due to the lowest correlation coefficient and the highest standard error.展开更多
As the significant regional development driving, industry agglomeration has become one of the most interested for industrial economist and regional economist. This paper chooses the main five E＆I industrial parks in ...As the significant regional development driving, industry agglomeration has become one of the most interested for industrial economist and regional economist. This paper chooses the main five E＆I industrial parks in Shaanxi Province as the research object, and systematically compares their industry agglomerations, such as the situations, patterns, development approaches, and so on. Finally, based on the situation of the five E＆I industrial parks, combined with the power and the attraction of sub-sectors industry, some suggestions on the formation and consolidation of agglomeration effect for each park are proposed.展开更多
文摘Elovicb, two-constant, parabolic diffusion, exponential, second-order, first-order and zero-order equations were used to describe the kinetic characteristics of potassium desorption from six paddy soils df Zhejiang Province in a constant electric field (44.4 V/ cm) of EUF. Results showed that the second-order and Elovich equations could describe the potassium desorption kinetics best, as evidenced by the highest correlation coefficients (r) and the lowest standard errors (SE). The first-order, two-constant and parabolic diffusion equations also described the K desorption kinetics well, as showed by the relatively high correlation coefficients and relatively low standard errors. The zero-order equation did not describe the K desorption satisfactorily with a relatively low correlation coefficient and relatively high standard error. However, the exponential equation could not be used to describe the K desorption kinetics, due to the lowest correlation coefficient and the highest standard error.
文摘As the significant regional development driving, industry agglomeration has become one of the most interested for industrial economist and regional economist. This paper chooses the main five E＆I industrial parks in Shaanxi Province as the research object, and systematically compares their industry agglomerations, such as the situations, patterns, development approaches, and so on. Finally, based on the situation of the five E＆I industrial parks, combined with the power and the attraction of sub-sectors industry, some suggestions on the formation and consolidation of agglomeration effect for each park are proposed.
