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   762篇
  免费   30篇
  2023年   8篇
  2021年   6篇
  2020年   17篇
  2019年   30篇
  2018年   25篇
  2017年   36篇
  2016年   41篇
  2015年   14篇
  2014年   21篇
  2013年   194篇
  2012年   28篇
  2011年   22篇
  2010年   23篇
  2009年   33篇
  2008年   19篇
  2007年   15篇
  2006年   13篇
  2005年   11篇
  2004年   22篇
  2003年   6篇
  2002年   13篇
  2001年   10篇
  2000年   9篇
  1999年   16篇
  1998年   7篇
  1997年   6篇
  1996年   6篇
  1995年   11篇
  1994年   8篇
  1993年   4篇
  1992年   5篇
  1991年   5篇
  1990年   3篇
  1989年   5篇
  1988年   3篇
  1987年   6篇
  1986年   3篇
  1985年   4篇
  1984年   8篇
  1983年   11篇
  1982年   6篇
  1980年   7篇
  1979年   8篇
  1978年   7篇
  1977年   3篇
  1976年   8篇
  1975年   6篇
  1973年   3篇
  1972年   4篇
  1965年   2篇
排序方式: 共有792条查询结果,搜索用时 15 毫秒
91.
The study of technology transfer in pottery production to the periphery of the Mycenaean world has been addressed by considering two different areas, southern Italy and central Macedonia. Technological features such as ceramic paste, decoration and firing have been determined for different ceramic groups established according to provenance criteria. The studies of technology and provenance have been performed following an archaeometric approach, using neutron activation analysis, petrographic analysis, X‐ray diffraction and scanning electron microscopy. The results have revealed the existence of two different models. On the one hand, southern Italy seems to exhibit a more organized pottery production, which follows a Mycenaean‐like technology, while in central Macedonia production is probably more varied, being based in part on the technology of the local tradition.  相似文献   
92.
In 1995 the dispute resolution system of the WTO was transformed to make it more effective in enforcing WTO rules. Ironically, the improvements in the system have contributed directly to greater conflict in the WTO. How can improving a system to resolve disputes actually exacerbate conflict? This article identifies a number of conflict‐enhancing consequences of the change in the dispute resolution mechanism. Conflict is not bad per se. Indeed, if the outcome of this conflict is that governments must better justify participation in the WTO, then conflict is good. But there is a danger that international courts are more likely than not to generate conflict, while the international legal and political system is less adept at weathering controversy and addressing valid public concerns. Left unaddressed, conflicts generated by international legal bodies can erode support for the international legal system and multilateral strategies in general. This article suggests solutions designed to build into internationally legalized processes political safety valves, greater political sensitivity, and improved accountability, as well as legitimacy enhancing devices. Demonstrated here in the case of the WTO, the analysis described applies to international legal systems generally.  相似文献   
93.
94.
95.
This article contributes to a growing literature on working-class suburbanization by arguing that both the residualization and privatization of council housing need to be properly historicized. This case study of housing policy in the borough of Brighton demonstrates that council house sales between the 1950s and 1970s were important in the residualization of inter-war estates well before the 'right to buy' legislation of the 1980s. Concerns about excessively affluent tenants can also be traced to the inter-war period, although it was not until the late 1950s that local Conservatives sought to push affluent council tenants into owner occupation via capping incomes and encouraging council house sales. The article shows that slum clearance had long been central to the local council's provision of municipal housing and that apart from two short periods following the First and Second World Wars, council housing was conceived of primarily as a residual tenure by those in control of policy implementation. It further demonstrates that slum clearance between the 1920s and 1960s altered the social constituency for council housing and, combined with selective privatization, specific allocation policies and disinvestment, led to the stigmatization of certain inter-war estates. The article suggests that further case studies are needed in order to test the wider applicability of these arguments during the middle years of the twentieth century.  相似文献   
96.
97.
98.
99.
在茂密纷乱的植被下面.某采砂场的土面被一道黑色的水平带所打断,那是一条窄窄的灰烬层。这个采砂场布满了不规则的台阶和断崖.它的出现打断了摩拉维亚南部葡萄庄园微微起伏的地形。冰川风经由中欧河谷平原携带来细细的沉积物。几千年来形成了数十米厚的地层堆积。这些堆积中埋藏着人类的偶然行为遗留的踪迹:几块燧石、捕获动物的骨骼。或是那来自火塘边的薄薄的灰烬层。它们为人类学家克洛德·列维·斯特劳斯提出的人类区别于世界上其他生物的一种活动——“炊煮”提供了很早的证据.  相似文献   
100.
Seasonality determination using stable oxygen isotope (δ18O) analyses in archaeological mollusk shell has been largely limited to aquatic settings where one of the two factors that control shell δ18O – water δ18O (or salinity) and temperature – is assumed to be constant. Open coastal marine environments reflect the former situation, and tropical estuaries constitute the latter. In an effort to expand stable isotope seasonality to an ecological setting where neither variable remains constant, we present a model of annual shell δ18O cycle of aragonite deposition derived from instrumental data on salinity and temperature from San Francisco Bay, California. The predicted range of modeled shell δ18O is consistent with observed δ18O values in prehistoric and modern shells when local conditions are considered. Measurements of δ18O taken at 0 mm and 2 mm from the terminal growth margin were made on 36 archaeological specimens of Macoma nasuta from a late Holocene hunter-gatherer site CA-ALA-17, and season of collection was inferred using the shell δ18O model. We conclude that shellfish exploitation occurred through the year with the exception of fall, which may indicate scheduling conflicts with acorn harvesting or other seasonally abundant resources elsewhere. The model supports the feasibility of stable isotope seasonality studies in temperate estuaries, provided that instrumental records are available to quantify the relevant water conditions at appropriate spatial and temporal scales.  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