资金流量矩阵表预测中的DRAS法研究

在投入产出分析中RAS法已被广泛应用,主要用于对预测期的投入产出消耗系数矩阵进行修订和预测。随着研究的深入,RAS法有了很多改进,但如果需要两个矩阵共同平衡预测的时候,常规的RAS法或改进的RAS法都难以完成,而对资金流量矩阵延长表的预测,正是需要同时预测两个平衡矩阵的情况。鉴于此,讨论了一种双矩阵RAS(Double Matrix RAS,DRAS)的平衡方法,对这种方法进行了数学表述,并就其在资金流量矩阵表预测中的应用给出了说明。

The Sequential Continuity of Multiplication on a Class of Infinite Matrix Algebras

Let λ and μ are sequence spaces and have both the signed_weak gliding hump property, (λ,μ) be the algebra of the infinite matrix operators which transform λ into μ, in this paper, we study the strong? Mackey? weak multiplier sequentially continuous problem of infinite matrix algebras (λ,μ).

Wind Speed Forecasting Based on ARMA-ARCH Model in Wind Farms

Wind speed forecasting is signif icant for wind farm planning and power grid operation. The research in this paper uses Eviews software to build the ARMA (autoregressive moving average) model of wind speed time series, and employs Lagrange multipliers to test the ARCH (autoregressive conditional heteroscedasticity) effects of the residuals of the ARMA model. Also, the corresponding ARMA-ARCH models are established, and the wind speed series are forecasted by using the ARMA model and ARMA-ARCH model respectively. The comparison of the forecasting accuracy of the above two models shows that the ARMA-ARCH model possesses higher forecasting accuracy than the ARMA model and has certain practical value.

Hardy-Sobolev spaces and their multipliers

In this paper,some properties of Hardy-Sobolev spaces are obtained. The multipliers on these spaces are defined,and our results show that the multiplier algebra is more complex than that on the classical Hardy spaces. In addition,the spectrum theorem is obtained for some special multiplier.