全文获取类型
收费全文 | 1112篇 |
免费 | 45篇 |
出版年
2021年 | 9篇 |
2020年 | 12篇 |
2019年 | 26篇 |
2018年 | 37篇 |
2017年 | 47篇 |
2016年 | 38篇 |
2015年 | 19篇 |
2014年 | 29篇 |
2013年 | 394篇 |
2012年 | 19篇 |
2011年 | 40篇 |
2010年 | 26篇 |
2009年 | 34篇 |
2008年 | 35篇 |
2007年 | 18篇 |
2006年 | 23篇 |
2005年 | 16篇 |
2004年 | 17篇 |
2003年 | 8篇 |
2002年 | 24篇 |
2001年 | 14篇 |
2000年 | 16篇 |
1999年 | 13篇 |
1998年 | 13篇 |
1997年 | 12篇 |
1996年 | 7篇 |
1995年 | 9篇 |
1994年 | 6篇 |
1993年 | 4篇 |
1992年 | 6篇 |
1991年 | 4篇 |
1990年 | 11篇 |
1989年 | 4篇 |
1988年 | 4篇 |
1986年 | 9篇 |
1985年 | 9篇 |
1984年 | 11篇 |
1983年 | 14篇 |
1982年 | 10篇 |
1980年 | 6篇 |
1979年 | 13篇 |
1978年 | 14篇 |
1977年 | 4篇 |
1976年 | 14篇 |
1975年 | 8篇 |
1974年 | 7篇 |
1973年 | 5篇 |
1972年 | 6篇 |
1970年 | 5篇 |
1969年 | 4篇 |
排序方式: 共有1157条查询结果,搜索用时 0 毫秒
991.
Charles E. Ehrlich 《Nations & Nationalism》1998,4(2):207-226
Abstract. The constitutional question of how to treat ethnic minorities within the context of a greater state has presented problems since the age of nationalism up to the present day. Several Catalan political theorists from the beginning of the twentieth century produced a large quantity of generally overlooked and untranslated work on the subject, which defined a terminology and discussed solutions in a manner coherent enough to be applicable to most times and places, and to withstand the test of scrutiny alongside better-known theorists. The thoughts of Lluis Duran i Ventosa, the theorist behind the Catalan regionalist movement in the first quarter of this century, deserve special exposure. He and his contemporaries demonstrated great understanding not only of their context within Spain, but also of generally applicable concepts, as well as an understanding of other societies, notably the Austrian Empire. 相似文献
992.
Charles Wilde 《Oceania; a journal devoted to the study of the native peoples of Australia, New Guinea, and the Islands of the Pacific》1998,69(2):133-134
Neither Cargo nor Cult: Ritual Politics and the Colonial Imagination in Fiji. By Martha Kaplan. Durham: Duke University Press, 1995. Pp. xi + 226. Price $A 相似文献
993.
Quantitative indicators of change for non-commodity resource management were examined, to assess whether the United States Department of Agriculture Forest Service has been changing its on-the-ground management practices to give more emphasis to non-commodity resources. Specifically, data on recreation management and on wildlife and fish habitat management were analyzed to determine whether any shifts in the agency's management priorities had occurred. All data examined indicate that the Forest Service has been increasing its activities in non-commodity resource management over historic levels. When viewed in context with other recent studies suggesting that the Forest Service is moving away from traditional commodity production, the results of this study provide evidence that a significant shift has occurred, or presently is occurring, in Forest Service management practices. 相似文献
994.
This paper analyzes the shopping behavior of consumers across space within the context of multipurpose shopping. The degree of multipurpose shopping is derived, as are the optimal number of single- and multipurpose trips, and the quantities of high- and low-order goods purchased on such trips. It is shown that all consumer choice variables are a function of consumer location relative to producer location. The consumer analysis is then utilized as an input into the profit-maximizing equation that determines optimal producer location. The model is illustrated through the use of numerical analysis. 相似文献
995.
996.
Taylor M. Oshan 《Geographical analysis》2023,55(1):179-183
The development of “route maps” for spatial analytical methods is a pursuit with important ramifications. Comber et al. propose a route map to guide applications of geographically weighted regression consisting of a three-step primary pathway and a series of secondary arterials. This comment first highlights some concerns about the underlying “map” (i.e., experimental setup and assumptions) and then with the proposed “route” (i.e., core decisions and evaluation criteria). It closes by suggesting a more general focus on identifying modeling issues with the highest impact and facilitating consensus-building, which could improve the future production of route maps for navigating the methodological landscape in spatial analysis. 相似文献
997.
Andrew Flores Daniel Boden Donald Haider-Markel Daniel Lewis Patrick Miller Jami Taylor 《政策研究杂志》2023,51(1):123-143
Our project uses the narrative policy framework (NPF) to explore narrative effects on attitudes about transgender rights. The framework focuses on the stories that are told about public policy. As opposed to conceptualizing communications as informational, NPF suggests that getting lost in the story is primary for attitude change. We also incorporate a perspective taking exercise to examine its effects on individual attitudes. Using an experiment on 1784 American adults, we found that individuals who received the inclusive transgender policy narrative by either watching or reading the narrative held views more supportive of transgender rights, with the effect greater for watching than reading. Those who experienced greater narrative transportation, being more lost in the story, reported more supportive attitudes. We further find that those with traits that lead them to become more imaginatively involved in stories occasionally are more greatly affected by watching policy narratives than those who are less imaginatively involved. However, perspective taking did not influence attitudes and weakened the treatment effects of the narratives. Our findings suggest stories can affect policy attitudes and beliefs, which may be conceptually distinct from traditional framing-based accounts and implies distinctive causal mechanisms that result in attitude change. 相似文献
998.
We provide a simplified treatment of phase separation of seawater near an igneous dike to obtain rough estimates of the thickness and duration of the two‐phase zone, the volume fractions of vapor and brine formed, and their distribution in the subsurface. Under the assumption that heat transfer occurs mainly by thermal conduction we show that, for a 2‐m wide dike, the maximum width of the two phase zone is approximately 20 cm and that a zone of halite is initially deposited near the dike wall. The two‐phase zone is mainly filled with vapor. For a value of thermal diffusivity of a = 10?6 m2 sec?1, the two‐phase zone begins to disappear at the base of the system after 13 days, and disappears completely by 16 days. For a lower value of thermal diffusivity, the width of the two‐phase region does not change appreciably but its duration increases as a?1. The width of the two‐phase zone determined by this simplified model agrees reasonably well with transient numerical solutions for the analogous two‐phase flow in a pure water system; however the duration of two‐phase flow is matched better using a smaller value of a. We compare the seafloor values of vapor salinity and temperature given by the model with vapor salinity data from the ‘A’ vent at 9–10°N on the East Pacific Rise (EPR) and argue that either non‐equilibrium thermodynamic behavior or near‐surface mixing of brine with vapor in the two‐phase region may explain the discrepancies between model predictions and data. 相似文献
999.
1000.
In theory everyone has the right to health. However, in reality many low income households are unable to fully access health services and therefore cannot fully claim their rights. Recently, in an attempt to overcome these limitations, health reforms in Chile under the Plan AUGE have proposed a series of legal entitlements to health care that are available to everyone regardless of income level. While this is an important starting point in ensuring more universal access to health, the process has raised a number of important issues, particularly on how these entitlements have been defined and how far they will be able to transform (gender) inequalities within the health system. Looking at this from a gender perspective enables us to see that despite the shift from a health care system based on redistributive rights towards one based on the right of recognition, certain sectors of the population remain excluded. Decision‐making processes have remained technocratic, and women's groups have been marginalized from the debate around the reform. Moreover, health policy makers continue to ignore the role of the unpaid care economy in health care provision. The current reform has served to reinforce the gender roles around health care. 相似文献