机构

• 地理科学与资源研究所 [2]
• 长春光学精密机械与物... [2]

采集方式

• OAI收割 [4]

内容类型

• 会议论文 [2]
• 期刊论文 [2]

发表日期

• 2022 [2]
• 2012 [2]

学科主题

筛选

浏览/检索结果: 共4条，第1-4条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Influencing factors of manufacturing agglomeration in the Beijing-Tianjin-Hebei region based on enterprise big data 期刊论文  OAI收割 JOURNAL OF GEOGRAPHICAL SCIENCES, 2022, 卷号: 32, 期号: 10, 页码: 2105-2128 作者:  Huang Yujin;  Sheng Kerong;  Sun Wei   |  收藏  |  浏览/下载：39/0  |  提交时间：2022/11/09 manufacturing agglomeration  hurdle model  DO index  Beijing-Tianjin-Hebei region   Influencing factors of manufacturing agglomeration in the Beijing-Tianjin-Hebei region based on enterprise big data 期刊论文  OAI收割 JOURNAL OF GEOGRAPHICAL SCIENCES, 2022, 卷号: 32, 期号: 10, 页码: 2105-2128 作者:  Huang Yujin;  Sheng Kerong;  Sun Wei   |  收藏  |  浏览/下载：36/0  |  提交时间：2022/11/09 manufacturing agglomeration  hurdle model  DO index  Beijing-Tianjin-Hebei region   Tracking error estimate for theodolite based on general regression neural network (EI CONFERENCE) 会议论文  OAI收割 3rd international Conference on Manufacturing Science and Engineering, ICMSE 2012, March 27, 2012 - March 29, 2012, Xiamen, China 作者:  Li M. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 To efficiently evaluate the tracking index of theodolite  as well as avoiding influence resulted from higher harmonics when used opto dynamic target and use equivalent sine to evaluate the tracking index  in this paper  we resorted to General Regression Neural Network to do the new research on theodolite tracking accuracy evaluation method. Experimental results indicate that the method realized the equivalent sine to evaluate the tracking index of theodolite and avoided the higher harmonics influence with opto dynamic target. The research in this paper has important value to the engineering practice. (2012) Trans Tech Publications.   Thermal-optical analysis for optical window under high Mach flight condition (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China Zhong C.; Ding Y.; Fu J. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 When the airborne platform  where installed the optical window  is in high Mach flight condition. The aerodynamic heating effect  which will influence optical properties of optical window  becomes very obvious. This special flight condition will change shape  refractive index and also refractive index distribution of optical window due to the generated high axial temperature gradient. To ensure image quality of aerial remote sensor  the present paper does thermal-optical analysis for optical window under high Mach flight condition. Then  on this basis  do simulations according to theoretical analysis and boundary conditions derived from practical assumptions in order to get the final conclusions. 2012 IEEE.