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   947篇
  免费   49篇
  2023年   12篇
  2022年   3篇
  2021年   8篇
  2020年   28篇
  2019年   44篇
  2018年   48篇
  2017年   62篇
  2016年   52篇
  2015年   30篇
  2014年   36篇
  2013年   205篇
  2012年   37篇
  2011年   35篇
  2010年   39篇
  2009年   30篇
  2008年   17篇
  2007年   22篇
  2006年   18篇
  2005年   17篇
  2004年   9篇
  2003年   18篇
  2002年   18篇
  2001年   15篇
  2000年   16篇
  1999年   44篇
  1998年   32篇
  1997年   13篇
  1996年   4篇
  1995年   7篇
  1994年   6篇
  1993年   3篇
  1992年   3篇
  1991年   3篇
  1990年   4篇
  1989年   4篇
  1988年   3篇
  1987年   3篇
  1986年   3篇
  1985年   2篇
  1984年   3篇
  1983年   4篇
  1982年   4篇
  1981年   6篇
  1980年   6篇
  1979年   2篇
  1978年   5篇
  1977年   6篇
  1976年   1篇
  1975年   4篇
  1966年   1篇
排序方式: 共有996条查询结果,搜索用时 93 毫秒
101.
The goal of the Massachusetts Watershed Initiative (MWI) is to use a watershed approach to restore and maintain the integrity of state waters. The MWI is presented as an effort to bring about the convergence of the agendas of government, the informed public, and the general public. In the planning phase of the MWI's pilot project in the Neponset River Watershed, government and the informed public successfully struggled to create a joint basin-wide action plan. Stronger outreach is needed to involve the broader public and to engage local municipalities and businesses more fully.  相似文献   
102.
Although the aetiology of bone pathologies in cattle is poorly documented, various deformations in the skeleton have been attributed to draught exploitation in the archaeozoological literature. This paper summarizes the results of an osteological study that was undertaken on the feet of modern draught oxen. This led to the definition of a series of draught‐related anomalies. In an attempt to describe the pathologies in a more consistent and quantitative way, a scoring scale for each individual bone pathology was established. The developed method is applied to cattle remains from four Roman and one late medieval site. The distribution of the observed pathological indices (PIs) on the first phalanges is interpreted in terms of the age structure of the cattle populations, and the possible modes of cattle exploitation and meat consumption in various settlement types. Copyright © 2000 John Wiley & Sons, Ltd.  相似文献   
103.
The advocacy work of non-government organisations can be either constrained or embraced by government attitudes and practices. Although it is widely accepted that NGOs are an essential component of a healthy and robust democracy, serving as essential intermediaries between community and government, and providing a voice for marginalised groups to make claims on governments between elections, the current dominance of the public choice paradigm in public administration has seen the legitimacy of NGOs come under attack. Questions have been raised about the representativeness of NGOs and the legitimacy of their standing as policy advocates. As a result of this shift many disadvantaged groups that had taken years to organise themselves sufficiently to have a voice have found themselves increasingly constrained and excluded from the policy-making process. The threats that many NGOs are now facing have the effect of reducing government accountability, sustaining existing inequities and, ultimately, diminishing the quality of Australian democracy.  相似文献   
104.
Exploring the Frontier of Livelihoods Research   总被引:1,自引:0,他引:1  
This article discusses the value of livelihoods studies and examines the obstacles which have prevented it from making a greater contribution to understanding the lives of poor people over the past decade. After examining the roots of the livelihoods approach, two major challenges are explored: the conceptualization of the problem of access, and how to achieve a better understanding of the mutual link between livelihood opportunities and decision‐making. The article concludes that access to livelihood opportunities is governed by social relations, institutions and organizations, and that power is an important (and sometimes overlooked) explanatory variable. In discussing the issue of access to livelihood opportunities, the authors note the occurrence of both strategic and unintentional behaviour and the importance of structural factors; they discuss concepts of styles and pathways, which try to cater for structural components and regularities; and they propose livelihood trajectories as an appropriate methodology for examining these issues. In this way, the article also sets the agenda for future livelihoods research.  相似文献   
105.
In the Central Australian community of Amunturrngu the Luritja management of the State is not only subversive to the development of representative democracy and a capitalist economy, but this discourse of (dis)engagement empowers community members. This offers autonomy, albeit marginal, from the mainstream. The ‘problem of the cultural’ emerges in this engagement and the production of meaning requires enunciating the ‘third space‘: the ambivalent space of the cultural interface. Within this post‐settlement space certain modalities have been reformulated to structure a complex locality that defies the reification of social structures that anthropology so readily draws. How do people operate in this space and what type of person is most active here? The theoretical tools for this examination of Amunturrngu's engagement with the State are taken from political anthropology and post‐colonial theory.  相似文献   
106.
The objective of this paper is to compare fractal‐based parameters calculated by different fractal methods for urban built‐up areas and to link the observed spatial variations to variables commonly used in urban geography, urban economics, or land‐use planning. Computations are performed on Brussels, Belgium. Two fractal methods (correlation and dilation) are systematically applied for evaluating the fractal dimension of built‐up surfaces; correlation is used to evaluate the fractal dimension of the borders (lines). Analyses show that while fractal dimension is ideal for distinguishing the morphology of Brussels, each estimation technique leads to slightly different results. Interesting associations are to be found between the fractal dimensions and rent, distance, income, and planning rules. Despite its limitations, fractal analysis seems to be a promising tool for describing the morphology of the city and for simulating its genesis and planning. The model is robust: it replicates the urban spatial regularities and patterns, and could hence fruitfully be integrated into intra‐urban simulation processes.  相似文献   
107.
作为当今国际学术界一位知名且相当有成就的荷兰东印度公司的档案学专家 ,包乐史教授充分搜集和系统运用荷兰文与中文的历史档案文献来研究华侨华人历史 ,尤其是 1 7、 1 8世纪东南亚华侨史、东南亚华商贸易和当时华侨的社会问题 ,从而构成了包教授对华侨华人历史研究的最主要的特色和成就。  相似文献   
108.
In this paper we evaluate the relative analytical capabilities of SEM-EDS, PIXE and EDXRF for characterizing archaeologically significant Anatolian obsidians on the basis of their elemental compositions. The study involves 54 geological samples from various sources, together with an archaeological case study involving 100 artifacts from Neolithic Çatalhöyük (central Anatolia). With each technique the artifacts formed two compositional groups that correlated with the East Göllü Da? and Nenezi Da? sources. The non-destructive capabilities of these methods are emphasized (albeit with certain analytical limitations in the case of SEM-EDS), suggesting important new techniques for Near Eastern obsidian provenance studies.  相似文献   
109.
This work describes the compositional characterisation of coccciopesto and natural pozzolanic mortars sampled in the Regio VI area of the archaeological site of Pompeii, with particular reference to the Casa di Pansa in Insula 6 and Casa 17 in Insula 2. Samples were studied by optical microscopy and analysed by XRF, SEM-EDS, LA-ICP-MS and XRPD. The XRF and SEM-EDS data, subjected to multivariate analysis (cluster analysis), identified the three main construction phases involved in building the Casa di Pansa. In addition, mineralogical and petrographic characteristics of the aggregate were determined and found to be compatible with pyroclastic deposits from the volcano Vesuvius. Study revealed C–S–H phases in the binder, due to pozzolanic hydration phemomena of hydrated lime with cocciopesto and natural pozzalana.  相似文献   
110.
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