全文获取类型
收费全文 | 567篇 |
免费 | 42篇 |
出版年
2023年 | 10篇 |
2022年 | 2篇 |
2021年 | 3篇 |
2020年 | 17篇 |
2019年 | 33篇 |
2018年 | 37篇 |
2017年 | 49篇 |
2016年 | 42篇 |
2015年 | 24篇 |
2014年 | 19篇 |
2013年 | 124篇 |
2012年 | 27篇 |
2011年 | 40篇 |
2010年 | 32篇 |
2009年 | 26篇 |
2008年 | 16篇 |
2007年 | 10篇 |
2006年 | 16篇 |
2005年 | 8篇 |
2004年 | 9篇 |
2003年 | 6篇 |
2002年 | 14篇 |
2001年 | 6篇 |
2000年 | 5篇 |
1999年 | 9篇 |
1998年 | 2篇 |
1997年 | 4篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1985年 | 1篇 |
1972年 | 2篇 |
1971年 | 1篇 |
排序方式: 共有609条查询结果,搜索用时 31 毫秒
501.
This article examines social, economic, and political factors influencing the distribution of resources to local governments under the EPA Brownfields Program, an innovative federal effort to encourage the remediation and redevelopment of contaminated properties. Signed into law in 2002, the Small Business Liability Relief and Brownfields Revitalization Act provided the program with a congressional mandate, new tools to promote reuse such as liability protections, and increased funding up to a level of $250 million per year. This article contributes to research on environmental regulatory reform with an analysis of successful and unsuccessful local government applicants for EPA Brownfields Program support between 2003 and 2007. Building on prior research, we develop a series of expectations and an empirical model, and estimate the influence of program priorities, government and civic capacity, interest group pressures, and institutional politics. Results point to significant relationships between program priorities and award patterns. Contrary both to EPA's explicit commitments to equity and to analysis of pre-2003 award patterns, however, we find negative correlations between the proportions of local populations that are nonwhite or low-income and the likelihood of receiving an award. In addition, better-resourced governments and several dimensions of political representation show strong associations with the likelihood of winning awards. We conclude by discussing implications. 相似文献
502.
Rachel M. Scott Hallie R. Buckley Matthew Spriggs Frédérique Valentin Stuart Bedford 《Journal of archaeological science》2010
Burnt human remains excavated from a scoop feature from a cemetery at Teouma, Vanuatu in the western Pacific (∼2850 BP) were examined to assess the nature of the deposit. Possible scenarios explaining the reason the bone was burnt and interred were assessed using osteological signatures taken from archaeological, experimental, and forensic studies. The methodology of the study included recording color change, types of bone distortion, and element representation in conjunction with archaeological evidence. The burnt and fragmented human bone (n = 430, fragments weighing 620 g) represents a single adult individual. Macroscopic evidence from the bone indicates the body had been fleshed or fresh at the time of burning and element representation follows a similar pattern to other burials excavated from the site. Excluding burning, there was no evidence of human modification to the bone such as cut marks, percussion pits or peri mortem trauma suggestive of cannibalism. The archaeological evidence from the site indicates that the body had not been burnt in the place the remains were subsequently discovered. The combined macroscopic and archaeological evidence strongly suggests that the human bone was burnt as a result of a deliberate cremation of an individual. If a conclusion of deliberate cremation is accepted, this research represents the first case of a Lapita period cremation and demonstrates how a combination of methods can explain the nature of an archaeological deposit of burnt human bone when the cause is not otherwise apparent. 相似文献
503.
504.
505.
506.
This essay addresses one of the defining characteristics of debates within human geography and across the social sciences during the last ten years: the encounter between traditional and postmodern discourses. It is argued that at least one issue has been unduly neglected: the material fact of groundless arguments. Alternatively portrayed as the father of all evils or celebrated as the liberation of scientific creativity, the groundlessness of arguments has to happen before it can be interpreted. The essay discusses examples of texts that accept the groundless happening of their claims head on. Through these examples, it is argued that possible lessons from the encounter with the so-called “postmodern challenge” include reconsidered notions of both scientific responsibility and argumentative materiality. 相似文献
507.
508.
509.
Andrew D. Cliff Peter Haggett Matthew Smallman-Raynor 《Journal of Historical Geography》2009,35(3):545-567
Iceland's centuries-long history of epidemics with its unusually complete disease records has attracted study from several disciplines. But detailed spatial data of particular interest to historical geographers date only from 1895 and were consistently maintained for about a century thereafter. Within this period, this paper concentrates on morbidity records of reported cases of infectious diseases for an 87-year window which was open between 1902 and 1988. In this time slice, spatially detailed data for seven demographically important infectious diseases allow the geography of 131 discrete epidemic waves with a recorded total of 529,000 cases to be tracked. Changes in the behaviour of the seven diseases over the period are analyzed and related to both epidemiological theory and to the changing historical geography of the island. The paper complements earlier Icelandic work by the authors on the historical geography of single diseases (measles, influenza and poliomyelitis) by extending the range of diseases, and by considering their common spatial behaviour and their interrelationships. 相似文献
510.