中国科学院机构知识库网格系统: 检索

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	Remote Sensing-Guided Sampling Design with Both Good Spatial Coverage and Feature Space Coverage for Accurate Farm Field-Level Soil Mapping 期刊论文 OAI收割 REMOTE SENSING, 2019, 卷号: 11, 期号: 16, 页码: 18 作者: Wang, Yongji; Jiang, Lili; Qi, Qingwen; Liu, Ying; Wang, Jun \| 收藏 \| 浏览/下载：24/0 \| 提交时间：2020/03/23 soil sampling spatial coverage feature coverage farm field-level soil mapping super-grid limited sample size
	Remote Sensing-Guided Sampling Design with Both Good Spatial Coverage and Feature Space Coverage for Accurate Farm Field-Level Soil Mapping 期刊论文 OAI收割 REMOTE SENSING, 2019, 卷号: 11, 期号: 16, 页码: 18 作者: Wang, Yongji; Jiang, Lili; Qi, Qingwen; Liu, Ying; Wang, Jun \| 收藏 \| 浏览/下载：25/0 \| 提交时间：2020/03/23 soil sampling spatial coverage feature coverage farm field-level soil mapping super-grid limited sample size
	Evaluation of weighted Fisher criteria for large category dimensionality reduction in application to Chinese handwriting recognition 期刊论文 OAI收割 PATTERN RECOGNITION, 2013, 卷号: 46, 期号: 9, 页码: 2599-2611 作者: Zhang, Xu-Yao; Liu, Cheng-Lin 收藏 \| 浏览/下载：35/0 \| 提交时间：2015/08/12 Dimensionality reduction Large category Class separation problem Weighted Fisher criteria Class level Sample level Chinese handwriting recognition
	The design of computer-generated holograms for testing unsymmetrical optical surfaces (EI CONFERENCE) 会议论文 OAI收割 2012 International Symposium on Photonics and Optoelectronics, SOPO 2012, May 21, 2012 - May 23, 2012, Shanghai, China 作者: Zhang X.; Zhang Y.; Zhang X.; Zhang X. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 It is a technical difficulty to test the unsymmtrical optical surfaces in non-contact methods. But we can do it using computer-generated holograms (CGH). The principle and design of the CGH have been discussed in the paper. Take the cubic suface as an example The order separation of the CGH is analyzed theoretically and the simulation result of the order separation is given in the paper. We develop the binary process of the continuous CGH phase function and get the sample of the amplitude CGH. A CGH for testing a cubic phase plate with duty cycle 0.5 is fabricated by using e-beam lithographic techniques. In this situation the contrast of the interference fringe pattern can achieve a level of 99.4% by calculation. 2012 IEEE.
	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 Soils - Degradation - Geology - Magnesium - Manganese - Nitrogen fertilizers - Potassium - Remote sensing - Sodium - Soil surveys - Base elements - Heavy materials - High concentration - Low level - Soil degradation - Soil sample - Tea plantations