机构

• 地理科学与资源研究所 [6]
• 长春光学精密机械与物... [6]
• 文献情报中心 [2]

采集方式

• OAI收割 [14]

内容类型

• 会议论文 [6]
• 期刊论文 [6]
• SCI/SSCI论文 [2]

发表日期

• 2017 [3]
• 2015 [1]
• 2013 [4]
• 2011 [1]
• 2010 [1]
• 2009 [2]
• 更多

学科主题

• 信息技术 [1]
• 编辑出版 [1]

筛选

浏览/检索结果: 共14条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择作者升序作者降序发表日期升序发表日期降序题名升序题名降序提交时间升序提交时间降序 Review of and prospects for China's human and economic geography 期刊论文  OAI收割 JOURNAL OF GEOGRAPHICAL SCIENCES, 2017, 卷号: 27, 期号: 12, 页码: 1556-1576 作者:  Chen Mingxing;  Long Hualou;  Wang Chengjin;  Huang Jinchuan;  Niu Fangqu   |  收藏  |  浏览/下载：37/0  |  提交时间：2019/09/25 human and economic geography  research review  prospects  High-Level Forum   Review of and prospects for China's human and economic geography 期刊论文  OAI收割 JOURNAL OF GEOGRAPHICAL SCIENCES, 2017, 卷号: 27, 期号: 12, 页码: 1556-1576 作者:  Chen Mingxing;  Long Hualou;  Wang Chengjin;  Huang Jinchuan;  Niu Fangqu   |  收藏  |  浏览/下载：29/0  |  提交时间：2019/09/25 human and economic geography  research review  prospects  High-Level Forum   Review of and prospects for China's human and economic geography 期刊论文  OAI收割 JOURNAL OF GEOGRAPHICAL SCIENCES, 2017, 卷号: 27, 期号: 12, 页码: 1556-1576 作者:  Chen Mingxing;  Long Hualou;  Wang Chengjin;  Huang Jinchuan;  Niu Fangqu   |  收藏  |  浏览/下载：45/0  |  提交时间：2019/09/25 human and economic geography  research review  prospects  High-Level Forum   Recent changes in wetlands on the Tibetan Plateau: A review SCI/SSCI论文  OAI收割 2015 作者:  Zhao Z. L.;  Zhang, Y. L.;  Liu, L. S.;  Liu, F. G.;  Zhang, H. F. 收藏  |  浏览/下载：44/0  |  提交时间：2015/12/09 Tibetan Plateau  wetland  research in remote sensing  net primary productivity  lake level changes  alpine wetlands  environmental degradation  spatial-distribution  southwest china  driving factors  source region  river-basin  land-cover   IESRL： An information extraction system for research level 期刊论文  OAI收割 Chinese Journal of Library and Information Science, 2013, 卷号: 6, 期号: 4, 页码: 16-27 作者:  LENG Fuhai 收藏  |  浏览/下载：71/0  |  提交时间：2014/02/26 Research papers  Information extraction  Semantic labeling  Regular expression  Conditional random fields  Research level   开放数据计量研究综述:计算网络用户行为和科学社群影响力的Altmetrics计量 期刊论文  OAI收割 现代图书情报技术, 2013, 卷号: 234, 期号: 6, 页码: 1-8 作者:  顾立平 收藏  |  浏览/下载：142/0  |  提交时间：2013/08/05 替代计量  影响测度  使用网络  引用网络  社会网络  开放科研数据  论文级别计量  Alternative metrics  Impact measure  Usage network  Citation network  Social network  Open research data  Article-Level Metrics   Fluoride and sulfur dioxide indoor pollution situation and control in coal-burning endemic area in Zhaotong, Yunnan, China SCI/SSCI论文  OAI收割 2013 Liu Y. L.; Luo K. L.; Li L.; Shahid M. Z. 收藏  |  浏览/下载：50/0  |  提交时间：2014/12/24 Coal-burning endemic fluorosis  Gaseous fluoride and sulfur dioxide  pollution level  Control research  Calcined dolomitic siliceous  limestone  air-pollution  health impacts  fluorosis  behavior   Fluoride and sulfur dioxide indoor pollution situation and control in coal-burning endemic area in Zhaotong, Yunnan, China 期刊论文  OAI收割 ATMOSPHERIC ENVIRONMENT, 2013, 卷号: 77, 页码: 725-737 Liu, YongLin(刘永林); Luo, KL; Li, L; Shahid, MZ 收藏  |  浏览/下载：35/0  |  提交时间：2014/01/06 Coal-burning endemic fluorosis  Gaseous fluoride and sulfur dioxide pollution level  Control research  Calcined dolomitic siliceous limestone   Systemic model for software cost analyzing and optimizing (EI CONFERENCE) 会议论文  OAI收割 2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011, May 27, 2011 - May 29, 2011, Xi'an, China 作者:  Zhanglei;  Zhanglei 收藏  |  浏览/下载：80/0  |  提交时间：2013/03/25 Constructing low cost software is the main method to save energy source in computer science. Traditional research about software cost is only in one level. They are partial in some degree. To settle the problem  a systemic model for software cost analyzing and optimizing is proposed in this paper. In this systemic model  software cost analyzing and optimizing are from low level to high level. It can provide all-sided analyzing and optimizing in instruction  source code level and structure level. Some suggestions and methods are given in each level to enrich the model. The systemic model expresses a new point of view in software cost. 2011 IEEE.   Experiments of second harmonic generation output in pulsed TEA CO 2 laser (EI CONFERENCE) 会议论文  OAI收割 High-Power Lasers and Applications V, October 18, 2010 - October 19, 2010, Beijing, China 作者:  Li D. 收藏  |  浏览/下载：79/0  |  提交时间：2013/03/25 It is always the hot subject to realize the output of high-power laser in the range of 3-5m wavelength. This rang of wave band has greatly important applications in military because it located in the atmosphere window. Generally there are two ways to obtain this range of laser wavelength. One way is through optical parameter oscillation (OPO) from shorter laser wavelength and the other is through second harmonic generation (SHG) from longer laser wavelength. Firstly  the comparison between tow nonlinear crystals ZnGeP2 and AgGaSe2 is conducted for their nonlinear coefficient and damaging threshold in theory. The theoretical results show that the crystal AgGaSe 2 is more suitable for the SHG of pulsed TEA CO2 laser. When using pulsed TEA CO2 laser with wavelength of 9.3m to pumping AgGaSe2 SHG crystal  the wavelength of 4.65m is obtained. In the condition of repetition rate 100Hz  the upmost output power of single pulse is up to level of 1W  which corresponding efficiency of SHG is about 6%. The experimental results show that the polarization of laser beam has greatly influence on the SHG output of the crystal. Under the radiation of 3MW/cm 2 from fundamental wave and the right position for maximal SHG output in the crystal  when polarization of laser beam rotates 4.5  the SHG output of energy decrease about 30%. The research of this paper will make a foundation for further development of mid-infrared laser. 2010 Copyright SPIE - The International Society for Optical Engineering.