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VisualC++j Microsoft公司最新推出的开发Windows和WindowsNT应用程序的可视化开发工具,是DeveloperStudio工具集的重要组成部分。本文利用VisualC++开发了大中型异步电动机电磁设计程序界面,其目的是为了使用户得到一个可视化的工作界面, 相似文献
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《国际计算机数学杂志》2012,89(7):823-839
A Waveform Relaxation method as applied to a linear system of ODEs is the Picard iteration for a linear Volterra integral equation of the second kind ({\cal I} - {\cal K})y = b \eqno (1) called Waveform Relaxation second kind equation. A corresponding Waveform Relaxation Runge-Kutta method is the Picard iteration for a discretized version ({\cal I} - {\cal K}_l )y_l = b_l \eqno (2) of the integral equation (1), where y l is the continuous solution of the original linear system of ODE provided by the so called limit method. We consider a W-cycle multigrid method, with Picard iteration as smoothing step, for iteratively computing y l . This multigrid method belongs to the class of multigrid methods of the second kind as described in Hackbusch [3, chapter 16]. In the paper we prove that the truncation error after one iteration is of the same order of the discretization error y l @ y of the limit method and the truncation error after two iterations has order larger than the discretization error. Thus we can see the multigrid method as a new numerical method for solving the original linear system of ODE which provides, after one iteration, a continuous solution of the same order of the solution of the limit method, and after two iterations, a solution with asymptotically the same error of the solution of the limit method. On the other hand the computational cost of the multigrid method is considerably smaller than the limit method. 相似文献
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G.L. Fiorini 《Nuclear Engineering and Design》2011,241(9):3461-3469
Fast Reactors have a unique capability as sustainable energy source; the closed fuel cycle allows significantly improving the usage of natural resources and the minimisation of volume and heat load of high-level waste. Among the fast reactor systems, the sodium-cooled fast reactor has the most comprehensive technological basis, thanks to the experience gained internationally from operating experimental, prototype and commercial size reactors.The paper summarizes the key characteristics of the four years large Collaborative Project on European Sodium Fast Reactor (CP ESFR - 2009-2012); the CP ESFR follows the 6th FP project named “Roadmap for a European Innovative SOdium cooled FAst Reactor - EISOFAR” further identifying, organizing and implementing a significant part of the needed R&D effort.The CP ESFR merges the contribution of 25 European partners; it is performed under the aegis of the 7th FP under the Area - Advanced Nuclear Systems with a refund from the European Commission of 5.8 M€ (11.55 M€ total budget). It is a key component of the European Sustainable Nuclear Energy Technology Platform (SNE TP) and its Strategic Research Agenda (SRA).The inputs for the project are the key research goals for fourth generation of European sodium cooled fast reactors which can be summarized as follows: an improved safety with in particular the achievement of a robust architecture vis à vis of abnormal situations and the robustness of the safety demonstrations; the guarantee of a financial risk similar to that of the other means of energy production; a flexible and robust management of nuclear materials and especially waste reduction through Minor Actinides burning.Within the paper relevant results of the first year of activity are succinctly presented; insights are given concerning the so called “working horses” cores and systems which have been provided by CEA and AREVA and that are used as a basis to test the performances and assess the pertinence of innovative solutions. 相似文献
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本文对建立综合目标识别系统的方法、原理进行了分析和讨论,并在此基础上,提出了关键技术的解决方法。 相似文献
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我国新的矿产资源储量分类标准,主要参考《联合国国际储量/资源分类框架》(1997),结合我国国情,采用经济意义、可行性评价程度和地质可靠程度三维分类模式,将固体矿产资源储量分为3大类16种类型,运用(EFG)三维编码表示,突出了经济意义,实现了与国际惯例接轨。矿产资源储量管理推出系列改革,政府不再直接审批矿产资源储量;矿产资源储量由评审机构评审后,再由政府认定;矿产资源储量评审实行执业资格制度;纳 相似文献
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Internet的迅猛发展及Web数据量的迅速膨胀为数据挖掘研究提供了丰富的资源.如何在这个巨大的、信息量无比丰富的信息空间提取所需的知识,是数据挖掘面临新的研究课题,Web挖掘是解决上述问题的一个途径.Web挖掘是数据挖掘技术在Web上的应用,介绍Web挖掘的特点,深入分析Web挖掘的分类,并详细阐述Web挖掘的发展应用. 相似文献