全文获取类型
| 收费全文 | 191篇 |
| 免费 | 11篇 |
| 国内免费 | 4篇 |
专业分类
| 测绘学 | 13篇 |
| 大气科学 | 14篇 |
| 地球物理 | 103篇 |
| 地质学 | 43篇 |
| 海洋学 | 9篇 |
| 综合类 | 12篇 |
| 自然地理 | 12篇 |
出版年
| 2022年 | 5篇 |
| 2021年 | 4篇 |
| 2020年 | 9篇 |
| 2019年 | 10篇 |
| 2018年 | 6篇 |
| 2017年 | 12篇 |
| 2016年 | 11篇 |
| 2015年 | 6篇 |
| 2014年 | 7篇 |
| 2013年 | 14篇 |
| 2012年 | 11篇 |
| 2011年 | 23篇 |
| 2010年 | 8篇 |
| 2009年 | 12篇 |
| 2008年 | 15篇 |
| 2007年 | 12篇 |
| 2006年 | 9篇 |
| 2005年 | 8篇 |
| 2004年 | 5篇 |
| 2003年 | 6篇 |
| 2002年 | 2篇 |
| 2001年 | 4篇 |
| 2000年 | 3篇 |
| 1997年 | 1篇 |
| 1995年 | 2篇 |
| 1993年 | 1篇 |
排序方式： 共有206条查询结果，搜索用时 15 毫秒
11.
Based on a calculation model, we study the interference phenomena of serially coupled V-type and Λ-type triple quantum dots (CTQDs) driven simultaneously by a strong driving field and a weak probe field. Strongly depending on the configuration of the three-level CTQD, the probe absorption spectra, which are shown in the tunneling current, exhibit various quantum coherence properties. In the case where the two pairs of transitions of the CTQD have a small eigenfrequency difference Δω, the double-coupling effect of the driving field results in two Autler-Townes doublets and one weak Mollow triplet in one spectrum. With the value of Δω increasing, only one Autler-Townes splitting remains due to the single-coupling of the field. We also find that the effect of spontaneous emission of phonons may lead to an obvious background current, which can be used to distinguish which transition is driven by the driving field in experiment. The interesting quantum property of a CTQD revealed in our results suggests its potential applications in quantum modulators and quantum logic devices. 相似文献
12.
13.
基于ArcGIS Server的地震应急数据与服务共享研究 总被引：1，自引：0，他引：1
ArcGIS Server是基于Web Service用来发布企业级GIS应用程序的综合平台。 本文以地震应急数据与服务共享为研究目标, 分析了ArcGIS Server的体系架构和几种常用共享模式的特点, 提出了基于Web Service和ArcGIS Server的共享模式, 详细阐述了地震应急数据与服务共享的理论方法和系统架构, 实现了基于ArcGIS Server开发地震应急信息共享的原型系统。 相似文献
14.
Jian Hua Li Zheng Ping Zhang Rui Huan Jing Chong Fu Huang 《Stochastic Environmental Research and Risk Assessment (SERRA)》2009,23(4):485-492
In this paper, we introduce a value chain approach, on the view of the value chain analytic in business management, to be
the framework of a crisis response system serving for crisis management strategy in identifying risk sources, responding to
unexpected events, and recovering from a shock. This system is not only a computer system but also a system of governmental
emergency response mechanism and it is tremendous and complex. The system integrates and coordinates the correlative resources
of emergency response units of the city. We consider the efficiency of the system. In addition, the run cost of the system
also is taken into account. Based on this framework, the Qingdao’s practical situation is analyzed. As a result, a design
proposal of the Qingdao’s crisis response system is put forward. 相似文献
15.
Emergency management evaluation by a fuzzy multi-criteria group decision support system 总被引：3，自引：1，他引：2
Guangquan Zhang Jun Ma Jie Lu 《Stochastic Environmental Research and Risk Assessment (SERRA)》2009,23(4):517-527
Emergency risk management (ERM) is a process which involves dealing with risks to the community arising from emergency events.
Emergency management evaluation as one of the important parts of ERM aims assessing and improving social preparedness and
organizational ability in identifying, analyzing, and treating emergency risks. This study first develops an emergency management
evaluation model. It then proposes an extended fuzzy multi-criteria group evaluation method, which can deal with both subjective
and objective criteria under multi-levels by a group of evaluators, for emergency management evaluation. A fuzzy multi-criteria
group decision support system (FMCGDSS) is then developed to implement the proposed method for the case of emergency operating
center/system evaluation. 相似文献
17.
18.
分析目前农村地震应急管理工作中存在的问题,从加强探明当地地质构造背景,加强覆盖全面的农村地震应急预案,加强建立农村处置突发地震灾害的领导指挥体系,加强群测群防网络建设,加强农村防震减灾科普宣传,加强农村民房抗震设防的宣传指导等六个方面提出了农村地震应急管理体系建设的改进对策。 相似文献
19.
20.