首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   892篇
  免费   34篇
  2024年   1篇
  2023年   11篇
  2022年   9篇
  2021年   2篇
  2020年   38篇
  2019年   34篇
  2018年   72篇
  2017年   66篇
  2016年   57篇
  2015年   43篇
  2014年   50篇
  2013年   220篇
  2012年   36篇
  2011年   43篇
  2010年   37篇
  2009年   21篇
  2008年   25篇
  2007年   28篇
  2006年   18篇
  2005年   13篇
  2004年   14篇
  2003年   6篇
  2002年   11篇
  2001年   5篇
  2000年   7篇
  1999年   6篇
  1998年   11篇
  1997年   5篇
  1996年   7篇
  1995年   1篇
  1994年   6篇
  1993年   3篇
  1992年   2篇
  1989年   3篇
  1988年   2篇
  1985年   1篇
  1984年   1篇
  1983年   1篇
  1982年   1篇
  1981年   3篇
  1980年   1篇
  1975年   1篇
  1973年   2篇
  1972年   1篇
  1966年   1篇
排序方式: 共有926条查询结果,搜索用时 46 毫秒
51.
The aim of this paper is to discuss the importance of different types of global services for industrial firms and clusters in terms of their economic competitiveness and innovative performance. The theoretical debates argue that globalization, deregulation and the new production organization make it necessary to use global services that are supplied easily with the help of new telecommunication technologies. The existing empirical studies provide some supporting evidence. However, they also indicate that global service firms can be attained by only smaller numbers of industrial firms and clusters. Still, in-house services besides temporal and informal mechanisms are important to meet the needs of the specialized services, even for the firms that try to become a part of the global production system. The paper focuses on three main questions: “What types of global services are becoming crucial for manufacturing firms and what type of services are still local and national? Is there a significant difference between the characteristics of firms that use the same type of services? To what extent is having access to global services important for the innovativeness of industrial firms and clusters? This paper looks for the answers to these questions based on existing case studies as well as this study of three industrial clusters in Turkey. The findings indicate that there is not a perfect match between theory and empirical evidence and there is a need for more refined theoretical discourses on industry–service relations.  相似文献   
52.
The evolution of Lombardy's economic structure and international position led the regional government to build up a network of public and private stakeholders in the effort of promoting the creation of new knowledge and supporting innovation at local level. In this article a technology picture of the region and the main policy actions undertaken in recent years in Lombardy to promote a nest of linkages within actors, moving along the approach of regional innovation systems are presented.  相似文献   
53.
Die Frage nach der Gestaltung von Zuwanderung ist in der Debatte um das Zuwanderungsgesetz vor allem auf diejenigen fokussiert worden, die noch kommen werden. Zugewanderte gestalten unsere Städte und Gemeinden jedoch bereits seit mehr als 40 Jahren aktiv mit: zum einen als Bewohner und Arbeitnehmer, zunehmend aber auch als Investoren und Gewerbetreibende. Und der Blick auf die Prognosen zur Bevölkerungsentwicklung zeigt, daß ihr Anteil an der Gesamtbevölkerung und damit auch ihr Einfluß auf die Stadt- und Wirtschaftsentwicklung weiter zunehmen. Deutlich ist: Zur Gestaltung der Zuwanderung bedarf es mehr als eines neuen Zuwanderungsgesetzes. Zugewanderte müssen die Chancen haben, sich aktiv an der Gestaltung unserer Innenstädte zu beteiligen. Lebenswerte Städte brauchen das Engagement aller Bevölkerungsgruppen. Bisher ist aber die Beteiligung von Zuwanderern bei raumrelevanten Fragestellungen trotz vielfältiger Ansätze immer noch nicht selbstverständlich. Der Bedarf der stärkeren Beteiligung von Zugewanderten besteht daher sowohl von Seiten der Migrantenvertreter als auch von Seiten der Fachverwaltungen. Dabei setzt sich die Planungsphilosophie durch, daß nicht für, sondern gemeinsam mit Zugewanderten geplant werden muß. Vor diesem Hintergrund hat die Stadt- und Regionalplanung Dr. Paul G. Jansen GmbH von 2001 bis 2003 mit Unterstützung des Ministeriums für Städtebau und Wohnen, Kultur und Sport des Landes Nordrhein-Westfalen das Modellprojekt Interkulturelle Stadtentwicklung in den drei Städten Bergkamen, Königswinter und Duisburg durchgeführt.  相似文献   
54.
In the 18th century, medical practice was essentially based on communication. Cranial trepanation, however, was usually performed on an unconscious person. Here the dialogue ceased. It was the only operation which had to be attempted without the positive consent of the patient. Thus trepanation challenged the surgeon's skill not only with its intricate surgical practice, but also with its unusual social setting. The present paper illustrates possible ways out of the "trap of trepanation" by interweaving two points of view. On the one hand, a general account is given on the basis of surgical publications written by Lorenz Heister and his contemporaries. On the other, the unpublished sources of the Heister correspondence serve to reconstruct the case of Heinrich Wilhelm Bachmann, a German merchant who fell victim to a traffic accident and underwent trepanation in 1753. The case study shows how the physician in charge counterbalanced the patient's inability to communicate by strengthening the remaining network of professionals, and ultimately confirming his decisions by use of the post-mortem.  相似文献   
55.
During the past decade research into the German Final Paleolithic and Mesolithic has experienced an important revival. One clear sign of this renewed interest in the periods are the annual meetings of the Arbeitsgruppe Mesolithikum (Mesolithic Working Group) which have taken place every spring since 1992. At these meetings, which take place at changing venues, topical themes of Final Paleolithic and Mesolithic interest are presented by informal lectures and it is also possible to study regional collections (artifacts, raw materials) at first hand. Numerous contributions were subsequently published together in one volume (Conard and Kind (1998) Aktuelle Forschungen zum Mesolithikum/Current Mesolithic Research, Mo Vince, Tübingen). The present paper intends to complement that collection of papers with a synthesis of developments and perspectives and to present recent research highlights in the German Final Paleolithic and Mesolithic, together with a comprehensive bibliography, to a wider international audience.  相似文献   
56.
57.
Summary

The paper exposes the views of Ernst Cassirer and Martin Heidegger on the dynamics of the sciences of their day, as both developed them in the two decades after the encounter of the two philosophers in Davos in 1928. It emphasizes points of common concern, and it compares their positions to those of contemporary philosophers of science Gaston Bachelard and Edgar Wind.  相似文献   
58.
59.
60.
Abstract

The sustainable development model has largely failed to address the social and environmental challenges of the 21st century. True sustainability will only occur when it is valued as a part of the taken-for-granted daily life of individuals and cultures across the globe. This has not yet happened because humanity has not evolved a global consciousness quickly enough to match the global advances in telecommunications and transportation technologies that have created a socially and economically ever-shrinking planet. Travel and tourism contributes to the expansion of global consciousness, although only in a haphazard and unintentional manner. The COVID-19 pandemic is a result of planetary time-space compression and is forcing an expansion in human consciousness that will make humankind better able to address global problems. There will still be considerable diversity on the planet, as now, but the pandemic will stimulate growing numbers of people, businesses and governments to adopt new ways of thinking, behaving and operating that are more closely aligned with the goals of sustainable development. This could be further enhanced if travel and tourism were to adopt the expansion and awakening of global conscious as a fundamental and transformational value in the products and experiences that it offers.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号