全文获取类型
收费全文 | 815篇 |
免费 | 15篇 |
专业分类
830篇 |
出版年
2024年 | 6篇 |
2023年 | 8篇 |
2022年 | 3篇 |
2021年 | 4篇 |
2020年 | 21篇 |
2019年 | 26篇 |
2018年 | 20篇 |
2017年 | 39篇 |
2016年 | 29篇 |
2015年 | 28篇 |
2014年 | 25篇 |
2013年 | 136篇 |
2012年 | 31篇 |
2011年 | 43篇 |
2010年 | 44篇 |
2009年 | 49篇 |
2008年 | 40篇 |
2007年 | 36篇 |
2006年 | 32篇 |
2005年 | 36篇 |
2004年 | 8篇 |
2003年 | 27篇 |
2002年 | 19篇 |
2001年 | 11篇 |
2000年 | 20篇 |
1999年 | 13篇 |
1998年 | 10篇 |
1996年 | 4篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 4篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1985年 | 2篇 |
1984年 | 5篇 |
1982年 | 6篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1976年 | 3篇 |
1974年 | 3篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1971年 | 2篇 |
1968年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有830条查询结果,搜索用时 0 毫秒
71.
In this article, a collaborative structure analysis (CSA) system is developed for integrating different finite-element simulation programs. In this system, a simulated structure is divided into multiple substructures, and the interaction between the substructures is considered. Interfaces for the commercial finite-element program ABAQUS and for an open-source framework for structure analysis, OpenSees, are developed to achieve CSA integration. The CSA system is applied to analysis of a soil-structure interaction (SSI) problem, and the effects of SSI are investigated, and the efficiency and accuracy of the system are demonstrated. 相似文献
72.
Lee Briscoe Thompson 《The American review of Canadian studies》2013,43(1):56-85
This article ponders the quest for a new Quebec constitution. It critically analyzes a proposed Quebec constitution introduced as a bill in Quebec's National Assembly in 2007 1 and probes the meaning and significance of such a provincial constitution. It makes some comparisons of Quebec's current constitution with those of other provinces and concludes by reflecting on the political prospects and legal effects of such a proposed new constitution. The adoption of a new Quebec constitution, along the lines proposed in 2007 and 2008, should not significantly alter Canada's constitutional order under Canadian law or affect Quebec's current constitutional arrangements with Ottawa and the other provinces. Such a new constitution might, however, come to prevail over other Quebec laws. The objectives of the proposed new constitution are to forge and reinforce Quebecers' sense of a common political identity. The project, however, is not currently at the forefront of discussion. 相似文献
73.
Abstract This article describes the background and reconstruction of the Belgian 1961 census sample file. Recently, a complete codebook for the sample file has been drawn up, and the representativeness of the sample has been evaluated as accurate, except for the loss of cases that occurred for three Belgian subregions. With the addition of the 1961 census sample, cross-sectional microdata from the five successive population censuses since that year, covering a broad range of topics, are now available to the research community. The reconstruction of the 1961 census sample was part of the activities of the HISSTAT project, which is currently being run by a consortium of research institutions in Belgium to bring together cross-sectional aggregated data since 1800, aggregated longitudinal data since 1880, and cross-sectional microdata since 1961, all covering the entire country. 相似文献
74.
75.
The Rev. James Raine Jun. 《考古杂志》2013,170(1):160-164
The English glass industry adopted coal as a fuel at the beginning of the seventeenth century, the consequent reduction in costs enabling sales and production to increase. From a minor forest industry, glass manufacture became an important part of the coalfield economy, with innovative furnace structures forming striking features in the eighteenth-century urban landscape. Recent archaeological investigation has shown that glass-works have left significant survivals on subsequently redeveloped sites, in the form of underground flues and furnace bases, and residues from processes. 相似文献
76.
78.
79.
80.