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   158篇
  免费   9篇
  2023年   6篇
  2022年   1篇
  2021年   1篇
  2020年   7篇
  2019年   16篇
  2018年   4篇
  2017年   9篇
  2016年   8篇
  2015年   9篇
  2014年   8篇
  2013年   19篇
  2012年   7篇
  2011年   8篇
  2010年   3篇
  2009年   2篇
  2008年   4篇
  2007年   4篇
  2006年   3篇
  2005年   6篇
  2004年   3篇
  2003年   1篇
  2002年   1篇
  2001年   1篇
  2000年   1篇
  1999年   1篇
  1998年   4篇
  1997年   2篇
  1996年   2篇
  1995年   1篇
  1994年   3篇
  1993年   2篇
  1992年   1篇
  1991年   1篇
  1990年   1篇
  1989年   1篇
  1987年   2篇
  1986年   1篇
  1984年   1篇
  1981年   1篇
  1980年   1篇
  1977年   1篇
  1974年   1篇
  1973年   1篇
  1972年   1篇
  1971年   2篇
  1970年   1篇
  1969年   3篇
排序方式: 共有167条查询结果,搜索用时 171 毫秒
71.
Engineering geological mapping was carried out at a scale of 1:25000 in the city of Bam, located in southeastern Iran, to provide engineering geological information as a base for seismic microzonation of the city. In this study, Seismic Refraction and Vertical Seismic Profiling (VSP) surveys were employed along with boreholes in order to identify the characteristics of subsurface material in Bam city. A number of different kinds of maps of the city were prepared consisting of Iso-depth, Iso-velocity, and Iso-Poisson's Ratio maps. The study also involves trial pitting and continuous core recovery, in-situ, and laboratory tests. Borehole data, index properties of soils, and standard penetration test results were used to assess subsurface conditions. Geophysical and geotechnical data were combined to simulate geotechnical boreholes and prepare engineering geological maps to provide basic data for seismic geotechnical microzonation to facilitate in the reconstruction of the city of Bam.  相似文献   
72.
In our research, we apply numerical modeling for prediction of liquefaction of sands during and after dynamic loading. In numerical modeling, to properly simulate the generation, redistribution, and dissipation of excess pore water pressure during and after dynamic loading, it is important to use a suitable constitutive model for soil. In this article, Dafalias and Manzari’s model [2004] (a critical state bounding surface plasticity model) was used to model the behavior of saturated sand due to relatively simple of formulations and a unique set of input parameters for a wide range of initial stress and void ratio. The attention in this article is on Babolsar sand. After calibration model parameters for Babolsar sand, the analysis of liquefaction using the modeling of a centrifuge test and predictions of model was carried out. The results indicate a reasonable performance of the model for prediction of behavior of types of sands. Also, Babolsar sand has more prone to dilatancy than Nevada and Toyoura sands.  相似文献   
73.
<正>A haunted atmosphere permeates the shabby manor.The windows without papers are black holes as if it were a dragon's pool or a tiger's den.  相似文献   
74.
75.
The archaeological site at Bat has an important status with regard to research on the Umm an‐Nar culture. Investigations began there in 1972 and were revived in 2004, when the excavation of tomb 401 was begun. This paper presents the complete corpus of grave‐goods. Despite all the disturbances within the find layers, when comparing the two chambers it is possible to observe some indications of the different burial cycles and detect distinguishing characteristics. Taking into account the divergent earlier and later ceramic styles, burial use must be proposed between 2400 and 2200 BC. This date accords with observations of the architectural details of tomb 401 and with the sequence of tomb construction types in the Bat region. This paper is dedicated to the memory of professor Gerd Weisgerber.  相似文献   
76.
77.
The present article presents the results of a recent (2009) survey of understandings and attitudes to heritage and culture in Chitral, Pakistan. Chitral has two main ethnic-religious groups: the Muslim Kho and the Kalasha, who are the largest non-Muslim minority group in the Hindu Kush. Very little is known formally of Chitral history and prehistory beyond the last 200–300 years, and this has led to a relatively set list of heritage and cultural events or traits being iterated by local people and outsiders alike. With a growing emphasis on tourism and development in Chitral we think that it is important for local people to have understanding and control of what is and is not presented as heritage here, and also how heritage might be appropriately preserved. We also touch on the tensions between a powerful majority and a less powerful minority group, and the impact such an unequal relationship has on heritage.  相似文献   
78.
79.
This article examines Kuwaiti citizens' views towards expanding citizenship rights to disenfranchised groups. Using survey data from 1581 Kuwaiti citizens in 1998, the author focused on the influence of Kuwaitis' social statuses, cultural affiliations, social networks and religious beliefs. Are attitudes toward inclusion specific to the national origin of the excluded? It was found that variables connoting status decrease support for the stateless. Cultural adherence to Islamic nationalism and Pan‐Arabism and those who follow the media regularly positively influence support for the stateless. These findings suggest that citizens' attitudes about inclusion/exclusion are specific to the national origin of the dis‐enfranchised.  相似文献   
80.
This paper attempts to explain the emergence and development of para-governmental organizations (bonyads) in Iran and demonstrate their contradictory position in the Iranian political economy. These organizations represent the dual power structure in Iran which reinforces the financial authority of religious leaders without accountability. By analyzing the functions of these organizations, the paper sets out to probe their economic policies in line with the government's populist macroeconomic policies. The paper demonstrates the adverse effects of these organizations on political development and economic reforms in the post-Khomeini era when the struggle for accountability soared.  相似文献   
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