ZB25型软盒卷烟包装机商标纸吸风管路的改进

针对ZB25型软盒卷烟包装机位于动力传动箱内部的商标纸吸风气管容易破裂、漏气、维修耗时长的问题,文章阐述了合理改变并重新设计商标纸吸风管路的安装位置等措施,使商标纸吸取性能更为稳定,维修操作更加方便快捷,极大地降低了工人的劳动强度和材料的消耗。     

道夫墙板钻孔工装的设计

道夫墙板是梳棉机道夫部件的重要组成部分,属于梳棉机主关键件,其质量好坏对梳棉机整机质量影响较大。文章设计了专用工装进行外圆丝孔加工,分度准确,质量达到了设计要求,而且定位迅速,大大提高了生产效率,解决了生产瓶颈问题。     

柳工856装载机电气故障模拟试验台开发

由于装载机结构庞大,电器元件隐蔽分散,不适合实物教学。我院研制开发的柳工856装载机电气故障模拟试验台结构紧凑、尺寸小,可在实验室内直接进行实验。教学效果较好,而且经济效益明显,占用实验室空间小。对国内高职院校工程机械电气课程教学有一定的示范和借鉴作用。     

汽车扭簧疲劳试验机的设计

针对汽车扭簧疲劳断裂特点,设计了一种基于曲柄摇杆机构的扭簧耐久测试机;采用PLC编程,在扭簧耐久测试中对其进行控制和计数。测试数据表明该机器设计结构简单,操作方便,运行可靠,测试结果合理。     

A conceptual framework for public-private interplay in the telecommunications sector

Public activity in the telecommunications industry has experienced important transformations in the last decade: “reinvolvement” in infrastructure deployment, “innovative” boosting measures, and decentralisation of some decisions. Conceptually, even more important than the measures themselves is the fact that private agents often participate in their realisation and execution. This paper reviews how justifications for public action that would apply to any economic activity area have modelled the public-private relationship in the telecommunications sector. Subsequently, it focuses on the analysis of the new spaces for public-private collaboration that are currently opening up.     

逆周期监管工具、机制与中国的选择

本文梳理并总结了国内外专家学者对逆周期监管主要工具和机制的最新研究成果,分析了中国的经济周期与宏观调控的措施,提出了我国建立适当的逆周期监管工具和机制的路径选择。     

结合机械设计教学开展多种形式计算机辅助设计

本文介绍作者多年来结合机械设计教学开展计算机辅助设计几种行之有效的形式。     

连续喂入式垫肩针刺机送料机构简析

介绍了对中曲柄摇杆机构在连续喂入式垫肩针刺机中的应用情况,阐述了送料机构与针刺机构的运动配合以及送料进给量的调整方法     

The use of ex-ante modelling tools in European Impact Assessment: What role does land use play?

Impact Assessment was introduced by the European Commission in 2002 in order to make policy development more transparent and improve the ‘quality’ of European policies. Cross-sectoral consultation, broad participation and the quantitative assessment of the impacts of policies are significant elements of this process. This article specifically addresses the role of tools modelling the impact of policies on land use in Impact Assessment. The choice of a specific modelling tool is conceptualised as an action situation interlinked with other action arenas. The article aims to uncover the institutions structuring the action situation. The outcome of the empirical work suggests that two types of Impact Assessments can be distinguished. Impact Assessments either substantively contribute to the specific policy that the Commission proposes or they legitimise policy choices ex post that have already been adopted. The legislative procedure that applies to a specific policy sector, the policy making culture in the DG and the stakes that are at issue seem to influence whether Impact Assessments contribute to policy development, or legitimise it. Furthermore, the article describes the situation in which desk officers choose a modelling tool throughout Impact Assessment. To advance their careers desk officers aim to produce policy proposals which respond to the issues raised by the actors involved in Impact Assessment and specifically in policy development and, later on, adoption. Therefore, desk officers’ preferences are shaped by the community that is involved in policy development and Impact Assessment. The article describes what role modelling tools play in European Impact Assessment procedures and it names the heuristic of criteria which desk officers use to choose a modelling tool. Besides several technical and data problems of modelling land use impact, it seems to be unlikely that land use will become a significant dimension of Impact Assessment and modelling as it is confronted with an unfavourable institutional environment at the European level.     

细长油缸孔在卧式床上的加工

液压缸的基本零件是油缸,对于细长油缸孔的加工应采用拉削加工的方法。刀杆在工作时不是悬伸的,而是两头有支撑,从而改变了其切削条件。切削刚度的加强,消除了振动,保证了加工精度,提高了生产率。