全文获取类型
收费全文 | 365篇 |
免费 | 24篇 |
出版年
2023年 | 4篇 |
2022年 | 2篇 |
2020年 | 5篇 |
2019年 | 17篇 |
2018年 | 12篇 |
2017年 | 14篇 |
2016年 | 12篇 |
2015年 | 17篇 |
2014年 | 7篇 |
2013年 | 95篇 |
2012年 | 20篇 |
2011年 | 8篇 |
2010年 | 12篇 |
2009年 | 7篇 |
2008年 | 9篇 |
2007年 | 2篇 |
2006年 | 6篇 |
2005年 | 6篇 |
2004年 | 6篇 |
2003年 | 6篇 |
2002年 | 7篇 |
2001年 | 7篇 |
2000年 | 3篇 |
1999年 | 2篇 |
1998年 | 3篇 |
1997年 | 9篇 |
1996年 | 4篇 |
1995年 | 5篇 |
1993年 | 4篇 |
1991年 | 3篇 |
1989年 | 6篇 |
1988年 | 4篇 |
1987年 | 5篇 |
1986年 | 3篇 |
1985年 | 2篇 |
1984年 | 4篇 |
1983年 | 3篇 |
1982年 | 10篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1979年 | 5篇 |
1978年 | 2篇 |
1977年 | 6篇 |
1976年 | 3篇 |
1974年 | 2篇 |
1971年 | 2篇 |
1970年 | 3篇 |
1960年 | 1篇 |
1959年 | 1篇 |
1958年 | 1篇 |
排序方式: 共有389条查询结果,搜索用时 15 毫秒
61.
The Franks incorporated Saxony into the Carolingian empire through a long, brutal struggle coupled with forced conversion. When Saxons themselves began to write a few decades afterwards, they had to make sense of this history and of their role and identity in their contemporary Carolingian world. In contrast to the portrayal of Saxons in writers such as Einhard and Rudolf, three ninth-century Saxon accounts of relic translations — those of Vitus, Pusinna and Liborius — reinterpreted history to claim a place for the Saxons as a distinct group equal to the Franks within the populus Christianus under the Carolingian monarchs. As a key part of their literary strategies, these authors attempted to salvage from the story of their defeat and forced Christianisation an account of God's sovereignty, native agency and virtue (especially fidelity) as a foundational element of Saxon identity. These texts prefigure the debates about post-conquest Saxon identity which would underlay the later and better-known Ottonian triumphal self-conceptions. Moreover, the concerns of these authors led them to remarkable hagiographical innovations in grappling with paganism, conversion, miracles, social class and faith. 相似文献
62.
63.
Mohan R. Akella Eric Delmelle Rajan Batta Peter Rogerson Alan Blatt 《Geographical analysis》2010,42(3):227-244
In this article, we address the problem of allocating an additional cell tower (or a set of towers) to an existing cellular network, maximizing the call completion probability. Our approach is derived from the adaptive spatial sampling problem using kriging, capitalizing on spatial correlation between cell phone signal strength data points and accounting for terrain morphology. Cell phone demand is reflected by population counts in the form of weights. The objective function, which is the weighted call completion probability, is highly nonlinear and complex (nondifferentiable and discontinuous). Sequential and simultaneous discrete optimization techniques are presented, and heuristics such as simulated annealing and Nelder–Mead are suggested to solve our problem. The adaptive spatial sampling problem is defined and related to the additional facility location problem. The approach is illustrated using data on cell phone call completion probability in a rural region of Erie County in western New York, and accounts for terrain variation using a line‐of‐sight approach. Finally, the computational results of sequential and simultaneous approaches are compared. Our model is also applicable to other facility location problems that aim to minimize the uncertainty associated with a customer visiting a new facility that has been added to an existing set of facilities. 相似文献
64.
65.
66.
Eric Reimer 《Irish Studies Review》2012,20(1):65-76
Although the progression of peace is, in all likelihood, finally imperilling the ascendancy of the thriller as the literary venue for representing social and political life in contemporary Northern Ireland, the genre continues to provide important access points for understanding the Troubles. Eoin McNamee's grim and harrowing Resurrection Man, for example, may be the only contemporary Northern Irish novel to represent the British government's mid-1970s internal security strategy known as ‘Ulsterisation’. By suggesting the various ways in which violence and subterfuge were nourished by government interests and supported by covert operatives, McNamee's novel subtly depicts a London intent on managing the conflict while insulating it from British politics and international criticism. Even as it does so, though, Resurrection Man ultimately struggles to avoid the thriller's more regressive tropes and generic conventions. 相似文献
67.
68.
69.
ABSTRACT This research analyzes manufacturing growth and decline across metropolitan and nonmetropolitan regions during the 1972–2002 period. We decompose real value added growth across local labor market areas in the lower 48 U.S. states into contributions from labor, capital, and total factor productivity. We then estimate a model describing the long‐run growth of labor, capital, and productivity and find that increased productivity increases the growth of labor and capital, as well as a positive correlation between labor and capital stock growth. We also find evidence that human capital investment and agglomeration economies encourage productivity growth, while unionization discourages it. 相似文献
70.
Eric Nost 《Tourism Geographies》2013,15(1):88-106
Abstract In this paper, I question how representations of tourist destinations color and are colored by development. Presenting the results of ethnographic fieldwork conducted on the southern Caribbean coast of Costa Rica, I find that the authenticity of portrayals of place is important not for its veracity, but for the social work it performs. Authenticity is not merely socially constructed but expressive of social relations which value people and places. Tourist perceptions of the caribe sur as genuinely underdeveloped—gauged by an analysis of photos and guidebooks as well as surveys—produce an approach to resource use within the community that is limiting. Because the value of the place is its underdevelopment, development itself constrains the possibility of sustaining further growth. Ultimately, reading development via place can be a guide for critically appreciating contemporary patterns of tourism and sustainable development in the caribe sur and elsewhere. 相似文献