HR——500ⅡA型自动温控红外热熔机整机结构设计

以红外热源的辐射热来热熔镀在印制电路板上的锡铅合金,具有很多的优点.本文着重对实施这一热熔工艺的专用设备——红外热熔机的整机造型、人机关系、各主要部件的功能和结构设计,作了较为详细的分析.     

Confronting the implications of the Cournot model with industry and firm data

This paper derives testable implications of the standard Cournot models and confronts these implications with real world data. Though we cannot expect that real world may be characterized by a simple static homogeneous model, it is surprising that little empirical work exists on testing the implications of this most popular model of oligopoly and non cooperative game theory.We make use of three data sets for manufacturing industry, two of them on the firm level, one about firms grouped according to their size. The relation of the results to the predictions of the Cournot model is discussed, as well as its relation to alternative oligopoly models. We specifically focus at the question whether the implications of the oligopoly models on the performance of large versus small firms are in line with the data.     

Revisiting an Evasive Concept: Introduction to the Special Issue on Competitiveness

The term competitiveness stems from the analysis of firms and is usually thought to be well defined at the firm level. Today, however, the notion competitiveness has become a prominent concept in the assessment of countries, regions and locations. The competitive advantage of nations and the competitiveness of locations have become important topics in economic policy. Interest in this field has been notably stimulated by the work of Michael Porter. Although the diversity of approaches presented in this issue may appear large to the reader, it is in reality dwarfed by the multiplicity of concepts, articles and books which have been written in reference to the term competitiveness. The vagueness of the general term, the lack of theoretical background, implicit preferences and prejudices, and finally the scope of policy recommendations made in reference to this term have induced outstanding researchers to warn that the term competitiveness of a nation could be dangerous, obsessive, elusive or meaningless.¹ The articles presented in this volume share some elements of this critique, but also demonstrate that research is being continued, and that it is indeed relevant to the design and evaluation of economic policy, most notably, the so-called Lisbon Strategy of the European Union.     

Der EU-Haushaltskompromiss vor dem Hintergrund der Gemeinsamen Agrarpolitik

Dem Kompromiss über die EU-Haushaltsplanung für die Jahre 2007 bis 2013 war eine kontroverse Debatte über den Umfang des „Briten-Rabatts“ und die Gemeinsame Agrarpolitik vorausgegangen. Welche Bedeutung hat die Agrarpolitik für die EU? Welche Mitgliedstaaten geh?ren im EU-Haushalt zu den Nettozahlern? Besteht ein Zusammenhang zwischen den Zahlungsstr?men aus dem EU-Haushalt und der Wohlstandsverteilung innerhalb der EU?     

供Ku波段卫星电视接收的径向线缝隙天线

本文对供Ku波段卫星电视接收使用的径向线缝隙天线的结构,口面场分布,耦合因子和效率等问题给予简要地介绍和分析;并指出,它是一种具有十分广阔市场的理想的DBS电视平面接收天线。     

一种加快频率合成器跳频速度的新方法

<正> 目前,欧共体单一市场的建立正紧锣密鼓地展开,为促成单一市场而提出的279项法规已通过过半。针对1992年后的欧共体单一市场,无论是发达国家还是发展中国家都在积极准备,寻求对策。激烈的竞争态势已经呈现。我国对欧共体出口也面临严峻形势。如何在未来的欧洲统一大市场中占有一席之地,已成为一项迫切需要研究的课题。     

触摸面板工艺

随着电子技术的发展,多功能、密集型、智能化的电子产品对操纵控制系统的要求越来越高。触摸面板作为一种新型操纵控制系统逐步得到推广使用。本文介绍触摸面板的结构及加工工艺。