QQ客服 官方微博 反馈留言

浏览/检索结果: 共6条，第1-6条 帮助 限定条件 专题：北京大学    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 An Improved Estimation of Regional Fractional Woody/Herbaceous Cover Using Combined Satellite Data and High-Quality Training Samples 期刊论文 REMOTE SENSING, 2017 Liu, Xu; Liu, Hongyan; Qiu, Shuang; Wu, Xiuchen; Tian, Yuhong; Hao, Qian 收藏  |  浏览/下载：8/0  |  提交时间：2017/12/03 vegetation fractional cover  semi-arid area  MODIS  satellite data integration  spatial sampling design  image classification  Random Forest regression  model performance evaluation  LAND-COVER  INNER-MONGOLIA  MODIS DATA  VEGETATION  SURFACE  STEPPE  FOREST  COEXISTENCE  TOPOGRAPHY  TRANSITION   State-Based General Gamma CUSUM for Modeling Heart Rate Variability Using Electrocardiography Signals 期刊论文 IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING, 2017 Chen, Lili; Zhang, Xi 收藏  |  浏览/下载：7/0  |  提交时间：2017/12/03 Cumulative sum (CUSUM)  disease diagnosis  general gamma distribution  heart rate variability  OBSTRUCTIVE SLEEP-APNEA  OXYGEN-SATURATION RECORDINGS  ACUTE MYOCARDIAL-INFARCTION  ARRHYTHMIA DIAGNOSIS  ELECTRICAL-ACTIVITY  CLASSIFICATION  CHARTS  PERFORMANCE  FEATURES   A study of supervised term weighting scheme for sentiment analysis 期刊论文 expert systems with applications, 2014 Deng, Zhi-Hong; Luo, Kun-Hu; Yu, Hong-Liang 收藏  |  浏览/下载：5/0  |  提交时间：2015/11/10 Sentiment analysis  Term weighting  Supervised learning  Experimentation  Performance  TEXT CATEGORIZATION  SEARCH TERMS  CLASSIFICATION   A Generic Approach for Systematic Analysis of Sports Videos 期刊论文 acm transactions on intelligent systems and technology, 2012 Zhang, Ning; Duan, Ling-Yu; Li, Lingfang; Huang, Qingming; Du, Jun; Gao, Wen; Guan, Ling 收藏  |  浏览/下载：3/0  |  提交时间：2015/11/16 Algorithms  Measurement  Performance  Experimentation  GENRE CLASSIFICATION  EVENT DETECTION  SOCCER VIDEO  CATEGORIZATION  FEATURES  RETRIEVAL   Urban land cover classification from very high resolution imagery using spectral and invariant moment shape information 期刊论文 canadian journal of remote sensing, 2010 Xu, Haiqing; Li, Peijun 收藏  |  浏览/下载：2/0  |  提交时间：2015/11/13 OBJECT-ORIENTED CLASSIFICATION  SUPPORT VECTOR MACHINES  HIERARCHICAL SEGMENTATION  WATERSHED CONTOURS  GEODESIC SALIENCY  RECOGNITION  REGISTRATION  PERFORMANCE  FEATURES  SYSTEM   A Novel Framework for Efficient Automated Singer Identification in Large Music Databases 期刊论文 acm transactions on information systems, 2009 Shen, Jialie; Shepherd, John; Cui, Bin; Tan, Kian-Lee 收藏  |  浏览/下载：2/0  |  提交时间：2015/11/16 Algorithms  Experimentation  Performance  Music retrieval  singer identification  Gaussian mixture models  classification  EM algorithm  statistical modeling  evaluation  CLASSIFICATION  SEGMENTATION  INTERNET