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   264篇
  免费   44篇
  2024年   1篇
  2023年   3篇
  2021年   2篇
  2020年   2篇
  2019年   6篇
  2018年   10篇
  2017年   21篇
  2016年   22篇
  2015年   1篇
  2014年   14篇
  2013年   59篇
  2012年   41篇
  2011年   47篇
  2010年   33篇
  2009年   1篇
  2008年   3篇
  2007年   3篇
  2006年   2篇
  2005年   1篇
  2004年   2篇
  2003年   5篇
  2002年   1篇
  2001年   2篇
  2000年   3篇
  1999年   2篇
  1998年   1篇
  1997年   3篇
  1996年   1篇
  1995年   4篇
  1994年   2篇
  1993年   4篇
  1992年   1篇
  1991年   1篇
  1990年   1篇
  1988年   1篇
  1986年   1篇
  1980年   1篇
排序方式: 共有308条查询结果,搜索用时 15 毫秒
91.
In 1992, an archaeological survey of Marawah Island conducted by the Abu Dhabi Islands Archaeological Survey identified two significant Neolithic settlements known as MR1 and MR11. Both sites are constructed on prominent rocky platforms located towards the western end of the island. In 2000 and 2003, small-scale excavations took place at MR11, with the first full excavation taking place in 2004. Excavations continued at MR11 between 2014 up to 2019. Radiocarbon dating demonstrates that the site was occupied between the earliest part of the sixth millennium to the mid-fifth millennium BC. Three areas have been so far examined. Area A—a tripartite house (2004 and 2014–2017 excavation seasons); Area B—a partial structure (in 2003 and 2017–2018); and Area C—a series of at least five rooms (in 2017–2019). The results provide a valuable new insight into the architecture and planning of Arabian Neolithic settlements in the region, as well as the earliest known evidence for pearling.  相似文献   
92.
93.
It is well‐known that the quest for an Islamic state was a desire common to most Islamists of the twentieth and twenty‐first centuries. This article discusses three contemporary political theories that stand in sharp contrast to the Islamists’ theory of an Islamic state. These political theories are developed by three prominent contemporary Muslim scholars, Nasr Hamid Abū Zayd, Ablodkarim Soroush, and Muhammad Mujtahed Shabestari. The article attempts to discuss the common themes between the views of these scholars concerning governance. It argues that the political theories presented by them significantly differ from those developed by most Islamists, who share the idea that Islam is a self‐sufficient political system. It also argues that while these political theories challenge the idea that incorporates the maximal role for government in religious matters and thus are close to certain aspects of regulations of governance in Western countries, they are different from those political theories in the West that focus on a sharp distinction between religion and state because religion, for such scholar, plays an important role in developing civil society.  相似文献   
94.
This article discusses the coverage of Saudi Arabia in “introduction to sociology” textbooks in the context of two variables — the September 11, 2001 attack, and globalization. The study covers 24 major textbooks, all published between 2001 and 2015. The textbooks were chosen with the help and consultation of many colleagues in numerous sociology departments throughout various parts of the United States. Also, the publishers of sociology textbooks were consulted throughout the process of selection. The method of investigation was content analysis which relied heavily upon studying the content of the text. The findings were organized in the following subsections: Islam; the Wahhabi version of Islam; Politics; September 11th and Bin Laden; Women in Saudi Arabia; Human Rights and Civil Rights Abuses; Social Media; Miscellaneous Positive or neutral comments on Saudi Arabia; Visual Sociology; and closing remarks. The finding of the article is more or less negative, as textbooks rarely mentioned positive things about Saudi Arabia.  相似文献   
95.
96.
Concurrent to the surge of U.S. forces in Iraq between 2006 and 2008, Sunni tribesmen in the U.S. Marine‐controlled western Anbar province of Iraq experienced an “awakening” movement, which led them to side with U.S. and coalition forces. The Sunni Awakening demonstrates that individuals will often realign because of betrayal and opportunities for advancement. It also demonstrates that individual motives can have macrolevel social consequences. Complexity theory suggests that political factions will realign based on individual considerations that then develop into macrolevel movements. Complexity theory also combines both agency (in terms of microbehaviors) and structure (in terms of initial conditions). An important concept within the complexity literature is the idea of “critical mass.” Theories of self‐organization suggest that individual considerations aggregate to a point of critical mass to become macrolevel movements. In the case of Iraq, you had individuals who decided as individuals to align with the Americans, but the macrolevel Awakening movement did not gain momentum until enough individuals had joined the movement. This pattern suggests that complexity theory can be used as a framework for understanding how critical mass is achieved in realignment.  相似文献   
97.
This article examines the role of Iran in Yemen within the context of Arab‐Iranian relations. It also examines the debate on the involvement of Iran in the ongoing political developments in Iraq, Lebanon, and Syria. The article focuses on the Houthi Movement in Yemen, its origin, growth and political expansion. It also investigates its relations with Iran and its allies in the region, and discusses other factors that strengthened its political image in Yemen. The article also provides an early assessment of the implication of the Decisive Storm military led by Saudi Arabia.  相似文献   
98.
99.
ALOS/PALSAR L-band full polarimetric data have been used to detect and characterize a well-defined geometric target hidden under sand deposits in the Western Desert of Egypt. This buried object is rectangular in shape with very straight boundaries and encloses an area of 500 m2. Inside the rectangular area there is a perfectly circular feature of approximately 53 m2 area. High and medium resolution optical satellite images (WorldView-2, ALOS/AVNIR-2) and field investigation confirm that the topography of the study area is relatively flat and completely covered by dry sand. The electromagnetic wave scattering behavior of the detected buried object was measured by decomposing the scattering matrix of ALOS/PALSAR full polarimetric data into Entropy-Alpha (H/α) and Freeman and Durden decompositions. Furthermore, a combination of unsupervised classification algorithms and Constant False-Alarm Rate (CFAR) edge detection was performed on the polarimetric data which revealed a well-defined geometric shape with straight borders. These borders have high α angles with low entropy, which physically means double bounce scattering mechanism with low randomness and is very similar to that of an urban scatterer, indicating that the detected target might be a buried wall-like foundation of a man-made structure. Moreover, 28 ground penetrating radar (GPR) profiles were acquired using a 270 MHz shielded antenna to validate the satellite radar remote sensing results. The GPR profiles reveal very clear hyperbolic shapes at 1.5 m depth with one of them showing a large hyperbolic shape-like structure, which might indicate the presence of a buried foundation. Thus the site might have significance to archaeological studies of the Western Desert, particularly previous human occupation and the sources of water for such habitation.  相似文献   
100.
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