我國能源消費(fèi)與gdp增長相關(guān)性分析-在線瀏覽
2024-09-06 15:11本頁面
【正文】 產(chǎn)的管理不夠科學(xué),造成能源利用率較低, 浪費(fèi)現(xiàn)象嚴(yán)重。 表 2 1990 2008年全國能源消耗和 GDP總量 擬合分析：圖中為散點(diǎn)圖用最小二乘法對該組數(shù)據(jù)進(jìn)行擬合。Linear model Poly1: f(x) = p1*x + p2Coefficients (with 95% confidence bounds): p1 = (, ) p2 = +004 (+004, +004)Goodness of fit: SSE: +014 Rsquare: Adjusted Rsquare: RMSE: +006 圖1為一次擬合圖2 二次擬合圖3 三次擬合 二次擬合其結(jié)果如圖2所示。Linear model Poly3: f(x) = p1*x^3 + p2*x^2 + p3*x + p4Coefficients (with 95% confidence bounds): p1 = (, ) p2 = (, ) p3 = (, ) p4 = +004 (+004, +004)Goodness of fit: SSE: +014 Rsquare: Adjusted Rsquare: RMSE: +006圖4 四次擬合圖5 五次擬合 四次擬合其結(jié)果如圖4所示。Linear model Poly5: f(x) = p1*x^5 + p2*x^4 + p3*x^3 + p4*x^2 + p5*x + p6Coefficients (with 95% confidence bounds): p1 = (, ) p2 = (, ) p3 = (, ) p4 = (, ) p5 = (, ) p6 = +004 (+004, +004)Goodness of fit: SSE: +013 Rsquare: Adjusted Rsquare: RMSE: +006圖6 六次擬合 六次擬合其結(jié)果如圖6所示。 一次擬合 其結(jié)果如圖7所示。General model Gauss2: f(x) = a1*exp(((xb1)/c1)^2) + a2*exp(((xb2)/c2)^2)Coefficients (with 95% confidence bounds): a1 = +004 (8011, +004) b1 = +005 (+005, +005) c1 = +004 (+004, +005) a2 = +005 (+005, +005) b2 = +005 (+005, +005) c2 = +005 (+005, +005)Goodness of fit: SSE: +014 Rsquare: Adjusted Rsquare: RMSE: +006 三次擬合其結(jié)果如圖9所示。General model Gauss4: f(x) = a1*exp(((xb1)/c1)^2) + a2*exp(((xb2)/c2)^2) + a3*exp(((xb3)/c3)^2) + a4*exp(((xb4)/c4)^2)Coefficients (with 95% confidence bounds): a1 = +005 (+021, +021) b1 = +005 (+017, +017) c1 = +004 (+018, +018) a2 = +011 (+032, +032) b2 = +005 (+023, +023) c2 = 3153 (+022, +022) a3 = +004
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