机构

• 地理科学与资源研究所 [1]
• 长春光学精密机械与物... [1]
• 沈阳自动化研究所 [1]
• 生态环境研究中心 [1]

采集方式

• OAI收割 [4]

内容类型

• 会议论文 [2]
• SCI/SSCI论文 [1]
• 期刊论文 [1]

发表日期

• 2022 [1]
• 2013 [2]
• 2012 [1]

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 Spatial scaling of land use/land cover and ecosystem services across urban hierarchical levels: patterns and relationships 期刊论文  OAI收割 LANDSCAPE ECOLOGY, 2022, 期号: 0, 页码: 1-25 作者:  Sun, Xiao;  Ma, Qun;  Fang, Guangji   |  收藏  |  浏览/下载：10/0  |  提交时间：2022/11/07 TIANJIN-HEBEI REGION  TRADE-OFFS  SPATIOTEMPORAL CHANGES  IMPERVIOUS SURFACES  LANDSCAPE PATTERNS  CHANGING SCALE  RIVER DELTA  CHINA  URBANIZATION  EXPANSION   A Local Image Enhancement Method Based on Adjacent Pixel Gray Order-preserving Principle 会议论文  OAI收割 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications, Beijing, June 25-27, 2013 作者:  Fan XP(范晓鹏);  Cai TF(蔡铁峰);  Zhu F(朱枫) 收藏  |  浏览/下载：35/0  |  提交时间：2013/12/26 The paper is committed in local image enhancement. At first, the authors propose an adjacent pixel gray order-preserving principle. Adjacent pixel gray order-preserving principle is the basement of local enhancement method which ensures that there is no distortion in processed image. And then, the authors propose an iterative algorithm, which could stretch gray-scale difference of adjacent pixels in premise of not changing gray magnitude relationship between adjacent pixels. At last, the authors propose a totally reference image quality assessment method based on adjacent pixel gray order-preserving principle. According to this quality assessment method, the authors made a set of comparative experiments with local histogram equalization and method. Experimental results show that the proposed enhancement method can get higher score and provide better visual effects, fully demonstrating its effectiveness. According to this quality assessment method, the proposed method shows a good effectiveness, through experimental results and comparison with local histogram equalization method.   Effects of land use classification on landscape metrics based on remote sensing and GIS SCI/SSCI论文  OAI收割 2013 Liu D. L.; Hao S. L.; Liu X. Z.; Li B. C.; He S. F.; Warrington D. N. 收藏  |  浏览/下载：31/0  |  提交时间：2014/12/24 Landscape metrics  Land use classification  Small watershed  Loess  Plateau  pattern-analysis  changing scale  loess plateau  sensitivity  indexes  china  statistics  accuracy  biodiversity  area   Lightweight design of large scale theodolite's turntable based on topology optimization of continuum structure (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 作者:  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y. 收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25 In order to solve the problem that the weight of large scale theodolite's casting or steel plate welded structure is too heavy  lightweight design of large scale turntable based on topology optimization of continuum structure is investigated. Topology optimization could have better optimization efficiency because it can provide the optimized distribution of material and gain optimized structure in conceptual design phase of the structural design. In order to obtain lightweight and high stiffness structure  a truss turntable based on topology optimization of continuum structure is presented  and the validity of this lightweight structure is examined by finite element analysis. Comparing to the traditional welding steel turntable  the lightweight turntable  without changing the static displacement  can lose 386.48 kg(lightweight ratio is 26.7%)  and its first-order natural frequency raises from 167.02Hz to 173.71Hz. Meanwhile  in other aspects this turntable also has better performance than traditional structure. 2012 IEEE.