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浏览/检索结果: 共17条，第1-10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 MOC: Wi-Fi FTM With Motion Observation Chain for Pervasive Indoor Positioning 期刊论文  OAI收割 IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS, 2024, 页码: 16 作者:  Shao, Wenhua;  Luo, Haiyong;  Zhao, Fang;  Hong, Yunhan;  Li, Yaqi   |  收藏  |  浏览/下载：5/0  |  提交时间：2024/12/06 Distance measurement  Accuracy  Position measurement  Wireless fidelity  Motion measurement  Protocols  Indoor environment  Factor graph  indoor localization  motion model  ranging model  time-of-flight   Performance research of real-time kinematic/5G combined positioning model 期刊论文  OAI收割 Measurement Science and Technology, 2022, 卷号: 34, 期号: 3 作者:  Li,Fangxin;  Tu,Rui;  Han,Junqiang   |  收藏  |  浏览/下载：11/0  |  提交时间：2023/12/13 real-time kinematic  5G millimeter wave  combined positioning  positioning accuracy  medium- and long-distance baseline   Applying a Portable Backpack Lidar to Measure and Locate Trees in a Nature Forest Plot: Accuracy and Error Analyses 期刊论文  OAI收割 REMOTE SENSING, 2022, 卷号: 14, 期号: 8 作者:  Xie, Yuyang;  Yang, Tao;  Wang, Xiaofeng;  Chen, Xi;  Pang, Shuxin   |  收藏  |  浏览/下载：21/0  |  提交时间：2024/03/07 backpack lidar  closed forest  SLAM  stem positioning  accuracy  paired-tree distance   Improving photoacoustic-imaging axial positioning accuracy and signal-to-noise ratio using acoustic echo effect 期刊论文  OAI收割 Sensors and Actuators A: Physical, 2021, 卷号: 329, 页码: 1-6 作者:  Zhao WX(赵文秀);  Yu HB(于海波);  Wen YD(文扬东);  Li P(李盼);  Wang XD(王晓朵)   |  收藏  |  浏览/下载：21/0  |  提交时间：2021/05/25 Photoacoustic  Echo effect  Distance accuracy  Signal-to-noise ratioa   Potential of multitemporal Gaofen-1 panchromatic/multispectral images for crop classification: case study in Xinjiang Uygur Autonomous Region, China 期刊论文  OAI收割 JOURNAL OF APPLIED REMOTE SENSING, 2015, 卷号: 9, 页码: 1669-1676 作者:  Hao, Pengyu;  Wang, Li;  Niu, Zheng 收藏  |  浏览/下载：24/0  |  提交时间：2016/04/20 random forest  object-based image analysis  feature importance  Jeffries-Matusita distance  classification accuracy  cotton  maize  wheat   Modified Nonparametric Weighted Feature Extraction Algorithm SCI/SSCI论文  OAI收割 2015 作者:  Cui L. L.;  Li, G. S.;  Ren, H. R.;  He, L.;  Liao, H. J. 收藏  |  浏览/下载：27/0  |  提交时间：2015/12/09 Spectral pan-similarity measure (SPM)  Euclidean distance (ED)  Nonparametric weighted spectral pan-similarity measure feature  extraction (NWSPMFE)  Nonparametric weighted feature extraction (NWFE)  thematic classification accuracy   Large-scale spatial interpolation of soil pH across the Loess Plateau, China 期刊论文  OAI收割 ENVIRONMENTAL EARTH SCIENCES, 2013, 卷号: 69, 期号: 8, 页码: 2731-2741 作者:  Liu, Zhi Peng;  Shao, Ming An;  Wang, Yun Qiang 收藏  |  浏览/下载：14/0  |  提交时间：2016/01/06 Geostatistics  Kriging  Inverse distance weighting  Splines  Interpolation accuracy   A shape context based Hausdorff similarity measure in image matching 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:  Ma TL(马天磊);  Liu YP(刘云鹏);  Shi ZL(史泽林);  Yin J(尹健) 收藏  |  浏览/下载：34/0  |  提交时间：2013/12/26 The traditional Hausdorff measure, which uses Euclidean distance metric (L2 norm) to define the distance between coordinates of any two points, has poor performance in the presence of the rotation and scale change although it is robust to the noise and occlusion. To address the problem, we define a novel similarity function including two parts in this paper. The first part is Hausdorff distance between shapes which is calculated by exploiting shape context that is rotation and scale invariant as the distance metric. The second part is the cost of matching between centroids. Unlike the traditional method, we use the centroid as reference point to obtain its shape context that embodies global information of the shape. Experiment results demonstrate that the function value between shapes is rotation and scale invariant and the matching accuracy of our algorithm is higher than that of previously proposed algorithm on the MEPG-7 database.   Large-scale spatial interpolation of soil pH across the Loess Plateau, China SCI/SSCI论文  OAI收割 2013 Liu Z. P.; Shao M. A.; Wang Y. Q. 收藏  |  浏览/下载：29/0  |  提交时间：2014/12/24 Geostatistics  Kriging  Inverse distance weighting  Splines  Interpolation accuracy  geostatistical analysis  microbial biomass  organic-carbon  variability  acidification  field  perspectives  management  fertilizer  region   Design and experimental research of a new type focus mechanism used in space-based telescope (EI CONFERENCE) 会议论文  OAI收割 2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China 作者:  Wang D. 收藏  |  浏览/下载：33/0  |  提交时间：2013/03/25 The position of focal plane will be changed because of temperature fluctuation and vacuum environment. In order to make the telescope work well  positioning accuracy of the mechanism is 0.008mm. The performance satisfies the need of precision  a focusing mechanism is needed. To majority of large space-based telescopes  and the scheme design is reasonable and practicable. 2012 IEEE.  the general way to do this would be to use a reflector  which was located in the backfocal distance. One of typical schemes of this mechanism was introduced  however  because of the big axial size  the mechanism can't be used when the size of the enclosure was limited. A new type of focusing mechanism was introduced  which has such advantages of small size  high accuracy and low mass. The design and test methods had been discussed. According to the results  the repeatability positioning accuracy is 0.0025mm