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   151篇
  免费   6篇
测绘学   3篇
大气科学   19篇
地球物理   70篇
地质学   35篇
海洋学   8篇
天文学   4篇
自然地理   18篇
  2023年   1篇
  2022年   2篇
  2021年   3篇
  2020年   4篇
  2019年   3篇
  2018年   5篇
  2017年   4篇
  2016年   7篇
  2015年   5篇
  2014年   5篇
  2013年   5篇
  2012年   4篇
  2011年   7篇
  2010年   18篇
  2009年   22篇
  2008年   9篇
  2007年   7篇
  2006年   2篇
  2005年   5篇
  2004年   3篇
  2003年   2篇
  2002年   2篇
  2001年   1篇
  2000年   6篇
  1999年   3篇
  1998年   2篇
  1997年   2篇
  1996年   2篇
  1994年   2篇
  1993年   2篇
  1992年   1篇
  1991年   1篇
  1990年   2篇
  1989年   1篇
  1987年   1篇
  1986年   2篇
  1985年   1篇
  1983年   3篇
排序方式: 共有157条查询结果,搜索用时 15 毫秒
31.
32.
Information included in this summary is based on more detailed reports published in the Bulletin of the Global Volcanism Network, vol. 35, no. 5, May 2010 (on the Internet at ). Edited by scientists at the Smithsonian, this bulletin includes reports provided by a worldwide network of correspondents. The reports contain the names and contact information for all sources. Please note that these reports are preliminary and subject to change as events are studied in more detail. The Global Volcanism Program welcomes further reports of current volcanism, seismic unrest, monitoring data, and field observations.  相似文献   
33.
Natural Hazards - There are several different estimates of the observed cyclone damage potential of tropical cyclones based on observations of size, intensity and track. For the analysis of climate...  相似文献   
34.
Information included in this summary is based on more detailed reports published in the Bulletin of the Global Volcanism Network, vol. 34, no. 7, July 2009 (on the Internet at ). Edited by scientists at the Smithsonian, this bulletin includes reports provided by a worldwide network of correspondents. The reports contain the names and contact information for all sources. Please note that these reports are preliminary and subject to change as events are studied in more detail. The Global Volcanism Program welcomes further reports of current volcanism, seismic unrest, monitoring data, and field observations.  相似文献   
35.
Information included in this summary is based on more detailed reports published in the Bulletin of the Global Volcanism Network, vol. 35, no. 2, February 2010 (on the Internet at ). Edited by scientists at the Smithsonian, this bulletin includes reports provided by a worldwide network of correspondents. The reports contain the names and contact information for all sources. Please note that these reports are preliminary and subject to change as events are studied in more detail. The Global Volcanism Program welcomes further reports of current volcanism, seismic unrest, monitoring data, and field observations.  相似文献   
36.
37.
This paper examines how retail businesses have employed the concept of environmental responsibility in order to justify their activities in the environmental arena. The sources of such publicised responsibility are investigated in terms of the relationship between the business and the consumer and how far responsibility has a moral base within the company or an economic justification with respect to demand. Data come from in-depth interviews with national and local managers of large multiple grocery superstores in the U.K. as well as from material published by these companies both through leafletting and more standardised reporting channels. Emphasis is placed upon the contradictions between the declaration of internally derived responsibility and the external pressures of demand, legislation and public image, suggesting an anticipatory form of environmental responsibility has been developed by retailers and that this may produce more proactive measures as the environmental debate matures.  相似文献   
38.
39.
Information included in this summary is based on more detailed reports published in the Bulletin of the Global Volcanism Network, vol. 32, no. 7, July 2007 (on the Internet at ). Edited by scientists at the Smithsonian, this bulletin includes reports provided by a worldwide network of correspondents. The reports contain the names and contact information for all sources. Please note that these reports are preliminary and subject to change as events are studied in more detail. The Global Volcanism Program welcomes further reports of current volcanism, seismic unrest, monitoring data, and field observations.  相似文献   
40.
Information included in this summary is based on more detailed reports published in the Bulletin of the Global Volcanism Network, vol. 33, no. 6, June 2008 (on the Internet at ). Edited by scientists at the Smithsonian, this bulletin includes reports provided by a worldwide network of correspondents. The reports contain the names and contact information for all sources. Please note that these reports are preliminary and subject to change as events are studied in more detail. The Global Volcanism Program welcomes further reports of current volcanism, seismic unrest, monitoring data, and field observations.  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