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浏览/检索结果: 共13条，第1-10条 帮助

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TKFIM: Top-K frequent itemset mining technique based on equivalence classes 期刊论文  OAI收割
PEERJ COMPUTER SCIENCE, 2021, 页码: 27
作者:  Iqbal, Saood;  Shahid, Abdul;  Roman, Muhammad;  Khan, Zahid;  Al-Otaibi, Shaha
  |  收藏  |  浏览/下载：37/0  |  提交时间：2021/12/01
A comparison of the approaches for gentrification identification 期刊论文  OAI收割
CITIES, 2019, 卷号: 95, 页码: 14
作者:  Liu, Cheng;  Deng, Yu;  Song, Weixuan;  Wu, Qiyan;  Gong, Jian
  |  收藏  |  浏览/下载：167/0  |  提交时间：2020/05/19
A comparison of the approaches for gentrification identification 期刊论文  OAI收割
CITIES, 2019, 卷号: 95, 页码: 14
作者:  Liu, Cheng;  Deng, Yu;  Song, Weixuan;  Wu, Qiyan;  Gong, Jian
  |  收藏  |  浏览/下载：24/0  |  提交时间：2020/05/19
Plants use alternative strategies to utilize nonexchangeable potassium in minerals 期刊论文  iSwitch采集
PLANT AND SOIL, 2011, 卷号: 343, 期号: 1-2, 页码: 209-220
作者:  Wang, Huo-Yan;  Shen, Qin-Hua;  Zhou, Jian-Min;  Wang, Jing;  Du, Chang-Wen
收藏  |  浏览/下载：28/0  |  提交时间：2019/10/10
A message-passing approach to random constraint satisfaction problems with growing domains 期刊论文  OAI收割
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2011, 期号: *, 页码: P02019
作者:  Zhou, HJ
收藏  |  浏览/下载：45/0  |  提交时间：2013/05/17
Automatic bridge extraction for optical images (EI CONFERENCE) 会议论文  OAI收割
6th International Conference on Image and Graphics, ICIG 2011, August 12, 2011 - August 15, 2011, Hefei, Anhui, China
Gu D.-Y.; Zhu C.-F.; Shen H.; Hu J.-Z.; Chang H.-X.
收藏  |  浏览/下载：33/0  |  提交时间：2013/03/25
This paper describes a novel hierarchy algorithm for extracting bridges over water in optical images. To reduce the omission of bridges by searching the edge  we extract the river regions which the bridges are included in. Firstly  we segment the optical image to get the coarse water bodies using iterative threshold  eliminate the noise regions and add the missing regions based on k-means clustering with texture information and spatial coherence. Then  the blanks are connected based on shape features and candidate bridge regions are segmented from river regions. Finally  the bridges are verified by geometric information and the ubiety between bridges and river. The results show that this approach is efficient and effective for extracting bridges in satellite image from Google Earth and in aerial optical images acquired by unmanned aerial vehicle. 2011 IEEE.  
Study on medical X-ray coherent scatter imaging and processing based digital flat detector (EI CONFERENCE) 会议论文  OAI收割
3rd International Conference on BioMedical Engineering and Informatics, BMEI 2010, October 16, 2010 - October 18, 2010, Yantai, China
作者:  Li B.;  Zhao J.;  Li B.;  Li B.;  Liu J.
收藏  |  浏览/下载：32/0  |  提交时间：2013/03/25
It is introduced a novel imaging technique for medical diagnostic X-ray coherent scatter in this paper. A set of experimental equipment for X-ray coherent scatter imaging was set up with X-ray digital flat detector and medical diagnostic X-ray source. According to this equipment  the scatter images obtained are made of some circles with the same center. It is vital to calculate the energy template to classify the different samples. It is difficult to separate them using the traditional threshold method due to noise and overlapped shadow. In this paper  the image was transformed a binary image by using K-Means algorithm and Mathematical Morphology Methods. The effective region was extracted from the binary image inside the orthogonal energy projection space  then to calculate the centroid of rings. Consequently the curve of the energy distribution was built. The experiment results show that our method is reasonable and feasible. The technique will have wide foreground of application .Besides the imaging of human bone content  it can be used for various imaging of tissue and organs in biology. 2010 IEEE.  
Production of Lambda-hypernuclei in A(p,K(+))(Lambda)B reactions 期刊论文  OAI收割
CHINESE PHYSICS C, 2008, 卷号: 32, 期号: 12, 页码: 962-971
作者:  Jiang Huan-Qing;  Jing Han-Tao;  Shen Peng-Nian;  Jing, HT , Chinese Acad Sci, Inst High Energy Phys, POB 918 4, Beijing 100049, Peoples R China
  |  收藏  |  浏览/下载：29/0  |  提交时间：2012/08/02
Temperature characteristics of high power vertical cavity surface emitting lasers (EI CONFERENCE) 会议论文  OAI收割
Semiconductor Lasers and Applications III, November 12, 2007 - November 13, 2007, Beijing, China
作者:  Qin L.
收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25
By using oxidation confinement technology high power vertical-cavity surface-emitting lasers are fabricated in experiment. The electrical and optical performance characteristics such as threshold current  efficiency  emission wavelength  and output power are measured under continuous wave (CW) condition at room temperature. The maximum output power is up to watt regime at wavelength of about 980nm. The temperature characteristics of the device are investigated experimentally in detail. The variation in lasing threshold current with temperature is studied. The characteristic temperature T0 of the device is derived  and the value is about 211K. Such a high characteristic temperature T0 of threshold current can lead to good temperature sensitivity of the device. At the same time  the lasing spectrum characteristics with temperature are also measured. The wavelength shift with temperature is just about 0.06nm/K. From the measured results  it is shown that the device can still operate at high temperature condition.  
Theoretical research of an improved C-V method to measure the elastic constants of nematic liquid crystal (EI CONFERENCE) 会议论文  OAI收割
Asia Display 2007, AD'07, March 12, 2007 - March 16, 2007, Shanghai, China
Kong X.; Jin H.; Huang X.; Liao Y.; Liu J. e.
收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25