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1.
采用空间计量经济学方法就我国省份电力消费需求的空间相关性及其驱动因素进行了实证分析.全域Moran指数揭示了我国省域电力消费需求的正向空间相关性,Moran散点图的变化展示了不同省域电力消费具有"路径依赖"特征.进一步的空间面板模型的估计结果不仅再次肯定了省域电力消费需求的空间相关性,而且证实了经济规模、人口规模和对外贸易对电力消费需求的增强效应以及技术进步与产业结构的优化调整对电力消费需求的节制作用.上述结论意味着依靠技术进步和产业结构优化调整才是实现经济增长和节电减耗双重目标的最佳选择.  相似文献   

2.
采用空间计量经济学方法就我国省份电力消费需求的空间相关性及其驱动因素进行了实证分析.全域Moran指数揭示了我国省域电力消费需求的正向空间相关性,Moran散点图的变化展示了不同省域电力消费具有"路径依赖"特征.进一步的空间面板模型的估计结果不仅再次肯定了省域电力消费需求的空间相关性,而且证实了经济规模、人口规模和对外贸易对电力消费需求的增强效应以及技术进步与产业结构的优化调整对电力消费需求的节制作用.上述结论意味着依靠技术进步和产业结构优化调整才是实现经济增长和节电减耗双重目标的最佳选择.  相似文献   

3.
基于投入产出模型,运用结构分解(SDA)技术测算了2012-2017年我国最终需求变动、进口变动及技术进步对中国数字经济部门总产出增长的影响.研究显示:1)国内最终需求是数字经济部门总产出增长的主要动力;2)进一步分解结果显示,技术进步中,数字技术进步是数字经济部门总产出增长的关键因素;国内最终需求中,需求水平是数字经济部门总产出增长的关键因素;3)数字经济制造业与数字经济服务业的增长机制具有异质性,数字经济制造业主要依靠最终需求水平的拉动,数字经济服务业还受到最终需求结构的变动及技术进步的影响.  相似文献   

4.
本文利用1996-2007年我国工业36个细分行业的面板数据,通过建立随机前沿模型,测算了转型期我国工业及其细分行业的全要素生产率,以及其分解要素的波动情况。实证研究表明,1996-2007年我国TFP平均为4.76%,并呈逐步上升趋势;TFP提高的主要原因是技术进步,平均来说,TFP增长的85.50%来源于技术进步的贡献;因为技术效率的提高使TFP平均每年提高了0.94个百分点;资源配置效率的提高对TFP的贡献年平均0.52个百分点,并有较大的波动;而因为规模总报酬递减的影响,TFP每年反而下降了0.78个百分点。通过经济增长来源分析,我国工业经济增长由主要靠资本驱动逐渐向靠技术创新驱动转变,转型期经济增长方式已表现为集约型。  相似文献   

5.
中国乡镇企业增长的随机前沿生产函数分析   总被引:1,自引:0,他引:1  
论文在运用中国1990-2005年间省际平衡面板数据的基础上,采用考虑非效率项的非中性技术进步随机前沿生产函数模型,分析了影响我国各省区乡镇企业增长的规模报酬、技术效率和技术进步因素。主要得出结论如下:在乡镇企业的发展过程中,资本产出弹性不断接近甚至有超过劳动产出弹性的趋势,呈现出一定的"资本深化"过程;整个规模报酬略大于1,这表明适当扩大乡镇企业经营规模存在着一定的规模经济效应;而整体平均技术效率水平逐年递增,技术进步率则逐年下降。在这些实证工作的基础上,论文还得出一些政策建议,希冀能够对实现我国乡镇企业的可持续发展有所裨益。  相似文献   

6.
本在分析经济增长的技术进步因素的希克期中性假定的基础上,利用势分析方法提出了中性假定的一般性,并计算了我国改革开放以来技术进步对经济增长贡献率。  相似文献   

7.
技术进步是影响经济增长的决定性因素,因此,技术进步的测度成为一个重要的研究问题。然而,技术进步的测度到目前为止还没有统一和令人信服的方法。本文使用DEA方法,基于理想生产前沿面构建了技术进步效率测度模型。技术进步效率测度模型是技术进步度量的一种新方法,是一个相对量的测量,规避了技术进步总量测算模型的一些缺陷。将模型用于测算我国1999~2008年的技术进步效率,测算结果表明我国大多数地区技术进步效率呈逐年上升的趋势,经济产出较高而同时消耗了较低资源投入的省份具有较高的技术进步效率。这说明低消耗的技术进步才是有效的,能够有效支撑经济的可持续发展。  相似文献   

8.
经济增长与技术进步的关系历来是国内外学者关心的热门问题.本文研究了经济增长与技术进步的关系,总结了技术进步的测算方法,提出了一个基于投资控制模型的测算技术进步的方法.  相似文献   

9.
本文提出对各产业各要素的完全消耗量核算思路,并进行实证核算,分析全要素能源效率及变动趋势。研究显示我国经济近几年全要素效率持续提高,但增长方式有明显变化,技术进步开始起着主导作用,规模效应、纯技术效应成为经济效应提升的阻碍。石油相关类产业、机械制造相关产业等效率提升较明显,而农业、食品、木材、皮革等产业效率有一定下降。产业发展的思路要兼顾产业中间产品的消耗,转变粗放式发展方式,以提升技术进步为中心。  相似文献   

10.
定量估算技术进步在经济增长中的作用   总被引:1,自引:0,他引:1  
技术进步在经济增长过程中起着十分重要的作用,在实现翻两番的战略任务中,能源、材料只能翻一番,资金也非常紧张,因此,有一番要依靠科学技术进步来实现.从宏观经济分析和微观经济分析都需要对技术进步的作用进行定量的估计. 国外在这一领域已做了大量的研究,#且得出许多分析结果,但所使用的模型和方法还不一致,因此不完全可比.国内近年也开展了这方面的研究.我们认为,结合中国国情,分析技术进步在经济增长中的作用,是一项紧迫而重要的任务. 一、衡量技术进步作用的模型 我们所指的技术进步是指广义的技术进步,它是使得在一定数量的生产要素…  相似文献   

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As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years (2001-2005). The main topics are: convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.  相似文献   

13.
张丽娜  吴建华 《数学进展》2008,37(1):115-117
One of the most fundamental problems in theoretical biology is to explain the mechanisms by which patterns and forms are created in the'living world. In his seminal paper "The Chemical Basis of Morphogenesis", Turing showed that a system of coupled reaction-diffusion equations can be used to describe patterns and forms in biological systems. However, the first experimental evidence to the Turing patterns was observed by De Kepper and her associates(1990) on the CIMA reaction in an open unstirred reactor, almost 40 years after Turing's prediction. Lengyel and Epstein characterized this famous experiment using a system of reaction-diffusion equations. The Lengyel-Epstein model is in the form as follows  相似文献   

14.
Schr(o)dinger operator is a central subject in the mathematical study of quantum mechanics.Consider the Schrodinger operator H = -△ V on R, where △ = d2/dx2 and the potential function V is real valued. In Fourier analysis, it is well-known that a square integrable function admits an expansion with exponentials as eigenfunctions of -△. A natural conjecture is that an L2 function admits a similar expansion in terms of "eigenfunctions" of H, a perturbation of the Laplacian (see [7], Ch. Ⅺ and the notes), under certain condition on V.  相似文献   

15.
In this paper, we study the explicit representation and convergence of (0, 1; 0)-interpolation on infinite interval, which means to determine a polynomial of degree ≤ 3n - 2 when the function values are prescribed at two set of points namely the zeros of Hn(x) and H′n(x) and the first derivatives at the zeros of H′n(x).  相似文献   

16.
We study a class of self-similar processes with stationary increments belonging to higher order Wiener chaoses which are similar to Hermite processes. We obtain an almost sure wavelet-like expansion of these processes. This allows us to compute the pointwise and local Hölder regularity of sample paths and to analyse their behaviour at infinity. We also provide some results on the Hausdorff dimension of the range and graphs of multidimensional anisotropic self-similar processes with stationary increments defined by multiple Wiener–Itô integrals.  相似文献   

17.
A cumulative-capacitated transportation problem is studied. The supply nodes and demand nodes are each chains. Shipments from a supply node to a demand node are possible only if the pair lies in a sublattice, or equivalently, in a staircase disjoint union of rectangles, of the product of the two chains. There are (lattice) superadditive upper bounds on the cumulative flows in all leading subrectangles of each rectangle. It is shown that there is a greatest cumulative flow formed by the natural generalization of the South-West Corner Rule that respects cumulative-flow capacities; it has maximum reward when the rewards are (lattice) superadditive; it is integer if the supplies, demands and capacities are integer; and it can be calculated myopically in linear time. The result is specialized to earlier work of Hoeffding (1940), Fréchet (1951), Lorentz (1953), Hoffman (1963) and Barnes and Hoffman (1985). Applications are given to extreme constrained bivariate distributions, optimal distribution with limited one-way product substitution and, generalizing results of Derman and Klein (1958), optimal sales with age-dependent rewards and capacities.To our friend, Philip Wolfe, with admiration and affection, on the occasion of his 65th birthday.Research was supported respectively by the IBM T.J. Watson and IBM Almaden Research Centers and is a minor revision of the IBM Research Report [6].  相似文献   

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正Journal overview:Journal of Mathematical Research with Applications(JMRA),formerly Journal of Mathematical Research and Exposition(JMRE)created in 1981,one of the transactions of China Society for Industrial and Applied Mathematics,is a home for original research papers of the highest quality in all areas of mathematics with applications.The target audience comprises:pure and applied mathematicians,graduate students in broad fields of sciences and technology,scientists and engineers interested in mathematics.  相似文献   

20.
正Applied Mathematics-A Journal of Chinese Universities,Series B(Appl.Math.J.Chinese Univ.,Ser.B)is a comprehensive applied mathematics journal jointly sponsored by Zhejiang University,China Society for Industrial and Applied Mathematics,and Springer-Verlag.It is a quarterly journal with  相似文献   

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