紧密纺纱系统的分类及性能特点

根据原理将紧密纺纱系统分成气流集聚型和非气流集聚型,再将气流集聚型细分成罗拉集聚型、胶辊集聚型、胶圈集聚型和网格圈集聚型.分析了各类紧密纺纱系统的结构及性能特点,并比较了集聚效果.认为非气流集聚型紧密纺纱系统虽可省去气流消耗而节约成本,但集聚效果不及气流集聚系统中的罗拉集聚和网格圈集聚.     

浅谈环境激素

环境激素是继臭氧层破坏、温室效应之后的又一全球性环境问题,由于环境激素的毒性作用剂量少、潜伏期长,其危害常常对生态环境产生灾难性的影响。其造成的危害已经引起社会极大地关注。主要叙述了环境激素的种类、污染途径、主要污染源、危害,并提出了污染控制及其防治对策。     

异步电动机电磁设计程序界面的开发

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,     

A Multigrid Method of the Second Kind for Solving Linear Systems of Odes Discretized by Continuous Runge-Kutta Methods

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.     

综合目标识别系统方法和原理讨论

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。     

我国实行新的矿产资源储量分类与新的矿产资源储量管理制度

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     

European Commission - 7th Framework Programme: The Collaborative Project on European Sodium Fast Reactor (CP ESFR)

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.     

天然色素的超临界流体萃取研究

本文重点综述了超临界流体技术在萃取天然色素中的应用成果,首次以天然色素的分类作为切入点,采研究超临界二氧化碳萃取不同种类色素的可行性,就其萃取理论和研究成果等方面进行了总结.最后探讨了超临界C02在萃取天然色素方面存在的不足之处和尚需解决的问题.     

山东省烟草侵染性病害名录

经过１９８６～１９９１年对山东烟区的全面普查和系统调查，已鉴定确诊烟草侵染性病害２５种，包括病毒病害６种，真菌病害１１种，细菌病害５种，线虫病害２种，寄生性种子植物１种。属本次调查中首次发现的有６种，其中烟草黄色斑驳坏死病为国内首次报道，烟草脉带花叶病、烟草青枯病、烟草空茎病、烟草灰霉病、兔丝子为省内首次报道。对过去虽有发现，但无详细鉴定的烟草低头黑病、烟草根黑腐病、烟草野火病、烟草角斑病、烟草根结线虫病等进行了研究。并对烟草低头黑病原菌进行了种的鉴定，现已定名为：辣椒炭疽菌烟草变种，此种为国际上新种。同时，通过调查明确了各类病害的分布和为害情况。     

Web挖掘的研究综述

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.