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   381篇
  免费   26篇
  2023年   8篇
  2022年   2篇
  2020年   9篇
  2019年   19篇
  2018年   23篇
  2017年   30篇
  2016年   20篇
  2015年   18篇
  2014年   22篇
  2013年   84篇
  2012年   19篇
  2011年   21篇
  2010年   10篇
  2009年   11篇
  2008年   7篇
  2006年   7篇
  2005年   4篇
  2004年   5篇
  2003年   3篇
  2002年   8篇
  2001年   4篇
  2000年   3篇
  1999年   7篇
  1998年   3篇
  1997年   3篇
  1996年   2篇
  1995年   4篇
  1994年   4篇
  1993年   1篇
  1992年   1篇
  1990年   1篇
  1988年   3篇
  1987年   2篇
  1984年   2篇
  1983年   3篇
  1982年   3篇
  1981年   2篇
  1980年   3篇
  1979年   1篇
  1978年   1篇
  1977年   5篇
  1976年   4篇
  1975年   3篇
  1974年   1篇
  1972年   1篇
  1966年   1篇
  1964年   2篇
  1960年   3篇
  1959年   1篇
  1950年   1篇
排序方式: 共有407条查询结果,搜索用时 187 毫秒
331.
ABSTRACT Border cities or regions are in theory more affected by the EU integration process than more central locations as it more drastically influences their transaction costs and market potential. We find a positive empirical effect of EU enlargement as measured by the growth in population share along the integration borders. This effect is active for a limited distance (70 km) and time period (30 years), and is more important for large cities and regions. Despite this positive EU enlargement effect along the border, a location close to a border remains a burden in view of the (larger) negative general border effect.  相似文献   
332.
ABSTRACT An important subset of the literature on agglomeration externalities hypothesizes that intrasectoral and intersectoral relations are endogenously determined in models of local and regional economic growth. Remarkably, structural adjustment models describing the spatio‐temporal dynamics of population and employment levels or growth traditionally do not include intersectoral economic dynamics. This paper argues and shows that allowing for economic linkages across sectors in these models adds considerable value, especially in forecasting. An econometric model of population–employment dynamics, in which sectoral variations in economic development are explicitly taken into account, is applied to a large urban planning policy proposal in the Netherlands. The empirical analyses suggest that population dynamics are largely exogenous, population changes drive employment in particular in the industry and retail sectors, and employment in all sectors depends strongly on intersectoral dynamics. Intersectoral dynamics appear as important drivers of regional sectoral employment changes; they are even more important than population changes, and their effect shows up clearly even within the Dutch institutional context where strict regulatory housing and planning restrictions are enforced.  相似文献   
333.
In this work the analytical results obtained by ICP-MS with laser ablation solid sampling and SEM-EDS for some polychrome glass vessels from the Iron Age are presented and discussed. The samples, coming from Etruscan sites near Adria (Northern Italy), belong to the so-called Mediterranean Groups I, II and III and are dated from the 5th, 3rd and 2nd century B.C., respectively. To date, analytical data for only two sets of vessels of the Iron Age have been discussed in the literature. In spite of the low number of available samples, this is the first time that vessels of all three periods are analytically compared. Elemental concentration data show that the samples can be classified as low-magnesia-low potash (LMLK) soda-lime-silica glasses, with low phosphorus and titanium contents, in agreement with data for similar samples of the same age. Bivariate and multivariate analyses of the contents of many elements characterizing the siliceous sands showed three distinct sets corresponding to the three periods. Since the sets indicate different provenances of the sands it seems rational to assume that different glassmaking locations were involved. Chromophores and opacifiers of the blue bodies and the yellow, white and turquoise decorations of the vessels were analytically identified, while the nature of the corresponding ores was hypothesized.  相似文献   
334.
335.
336.
This article examines Grotius’ lifelong support for Dutch expansion overseas. As noted in other publications of mine, Grotius cooperated closely with the directors of the Dutch East India Company (VOC) in the years 1604–1615. Right up to his arrest for high treason in August 1618, he contributed towards Dutch government discussions about the establishment of a West India Company (WIC). Three years of imprisonment at Loevestein Castle and, following his escape, long years of exile could not weaken his dedication to the cause. His relatives in Holland, in particular his brother Willem de Groot and his brother-in-law Nicolaas van Reigersberch, kept him up-to-date on the fortunes of the VOC and WIC. His expertise on maritime affairs was in high demand. For example, Cardinal Richelieu invited him in November 1626 to become actively involved in the establishment of a French East India Company. As itinerant ideologue of empire, Grotius sought to further his own career and those of his nearest family members, without damaging the interests of the United Provinces. Through Willem de Groot and Nicolaas van Reigersberch, he provided informal advice on Dutch imperial policy to the VOC directors and government officials in The Hague. He was rewarded with the appointment of his brother and his second son, Pieter de Groot, as VOC lawyers (ordinaris advocaten) in 1639 and 1644, respectively. They served as his proxies in diplomatic disputes involving the VOC, the States General and the Portuguese ambassador in autumn 1644, when Pieter and Willem de Groot wrote a defense of VOC claims to the cinnamon-producing areas of Ceylon (modern-day Sri Lanka), liberally citing De Jure Belli ac Pacis. Grotius’ vision of empire hardly changed in the course of 40 years. In his view, the Dutch had gone to the Indies as merchants, not conquerors, and should regulate themselves according to natural law and the law of nations. Thus he contributed to the creation of two political orders, one for Europe and one for the Indies. European diplomatic relations counted for little beyond the Line. VOC and WIC officials could act as judges and executioners in their own cause, without reference to indigenous rulers, other colonial powers, or even the political authorities back home.  相似文献   
337.
338.
339.
340.
ABSTRACT. Incorporating regional asymmetry and negative feedbacks (congestion) in a model of economic geography and international trade shows that complete specialization of production at one location is unlikely. We identify an agglomerating force: the home market effect, and two spreading forces, competition for demand from immobile sectors of production and congestion. We demonstrate that negative feedbacks can explain the economic viability of small industrial regions observed in the real world. Simulations clarify the basic structure of the model.  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