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浏览/检索结果: 共10条，第1-10条 帮助

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Precipitation recharges the shallow groundwater of check dams in the loessial hilly and gully region of China 期刊论文  OAI收割
SCIENCE OF THE TOTAL ENVIRONMENT, 2020, 卷号: 742, 页码: 12
作者:  Luo, Zhanbin;  Yong, Chenxu;  Fan, Jun;  Shao, Ming'an;  Wang, Sheng
  |  收藏  |  浏览/下载：34/0  |  提交时间：2021/03/16
River base level change in mouth channel evolution: The case of the Yellow River delta, China 期刊论文  OAI收割
CATENA, 2019, 卷号: 183, 页码: 10
作者:  Shi, Changxing;  Zhou, Yuanyuan;  Liu, Xiaofei;  Chen, Xiongbo
  |  收藏  |  浏览/下载：78/0  |  提交时间：2020/05/19
River base level change in mouth channel evolution: The case of the Yellow River delta, China 期刊论文  OAI收割
CATENA, 2019, 卷号: 183, 页码: 10
作者:  Shi, Changxing;  Zhou, Yuanyuan;  Liu, Xiaofei;  Chen, Xiongbo
  |  收藏  |  浏览/下载：12/0  |  提交时间：2020/05/19
APPLICATION OF HIGH-RESOLUTION SEQUENCE STRATIGRAPHY ON A BEACH-BAR SYSTEM, LAYER B0 OF THE MEDIUM SUB-MEMBER OF SHAHEJIE FORMATION, MD OILFIELD, CHINA 期刊论文  OAI收割
FRESENIUS ENVIRONMENTAL BULLETIN, 2019, 卷号: 28, 期号: 4A, 页码: 3545-3553
作者:  Ma, Yuliang;  Xie, Ruijie;  Zheng, Huan;  Yu, Tao;  Zhu, Feng
  |  收藏  |  浏览/下载：33/0  |  提交时间：2020/04/08
Sediment budgets for a sediment-laden river: the lower Wei River in the period 1960-1990 SCI/SSCI论文  OAI收割
2015
作者:  Shao W. W.;  Shi, C. X.;  Fan, X. L.;  Zhou, Y. Y.;  Bai, J. B.
收藏  |  浏览/下载：36/0  |  提交时间：2015/12/09
Assessment of pH and soil degradation: Case of Rwanda tea growing areas 会议论文  OAI收割
2010 2nd IITA International Conference on Geoscience and Remote Sensing, Qingdao, China, 2010
De La Paix; Mupenzi Jean1; Ge; Jiwen1; Li; Lanhai2; Habiyaremye; Gabriel1; Theoneste; Nzayisenga3; Emmanuel; Kamanzi3
收藏  |  浏览/下载：21/0  |  提交时间：2011/08/23
Spatial pattern and influencing factor of county-level industrial development in liaoning province of china 期刊论文  iSwitch采集
Chinese geographical science, 2008, 卷号: 18, 期号: 1, 页码: 24-32
作者:  Gao Xiaona;  Ma Yanji
收藏  |  浏览/下载：24/0  |  提交时间：2019/05/10
A new algorithm of image segmentation for overlapping grain image (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者:  Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25
Image segmentation is primary issue in image processing  at the same time it is principal problem in low level vision in computer vision field. It is the key technology to process image analysis  image comprehend and image depict successfully. Aim at measurement of granularity size of nonmetal grain  a new algorithm of image segmentation and parameters calculation for overlapping grain image is studied. The hypostasis of this algorithm is present some new attributes of graph sequence from discrete attribute of graph  consequently achieve that pick up the geometrical characteristics from input graph  and new graph sequence which in favor of image segmentation is recombined. The conception that image edge denoted with "twin-point" is put forward  base on geometrical characters of point  image edge is transformed into serial edge  and on recombined serial image edge  based on direction vector definition of line and some additional restricted conditions  the segmentation twin-points are searched with  thus image segmentation is accomplished. Serial image edge is transformed into twin-point pattern  to realize calculation of area and granularity size of nonmetal grain. The inkling and uncertainty on selection of structure element which base on mathematical morphology are avoided in this algorithm  and image segmentation and parameters calculation are realized without changing grain's self statistical characters.  
Analysis of a precise instrument for measuring reference level involute (EI CONFERENCE) 会议论文  OAI收割
Third International Symposium on Precision Mechanical Measurements, August 2, 2006 - August 6, 2006, Xinjiang, China
作者:  Zhang Y.;  Wang X.;  Wang X.;  Wang X.;  Wang L.
收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25
Reference level involute is used for evaluating other involutes  but it is very difficult to measure reference level involute exactly. Nowadays the available methods for measuring precise involute include single base disc mode  electronic generation mode  and CNC three-coordinate mode. But measurement accuracy of the modes above is not suitable for reference level involute. A precise instrument for measuring reference level involute  double base discs instrument  is introduced. It is consistent with generation principle of the involute entirely. Besides having the advantages of single basic disc instrument  the instrument can remove Abbe error caused by the stylus  and has no pressure deforming. The instrument's structure is described. The main sources of measurement errors are analyzed and methods for compensation are presented. Finally  uncertainty of the instrument is given  which meets reference level involute test specification.  
Causes for continuous siltation of the lower Yellow River SCI/SSCI论文  OAI收割
2005
Shi C. X.
收藏  |  浏览/下载：25/0  |  提交时间：2012/06/08