中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共8条，第1-8条

帮助

条数/页：排序方式：
	Modelling stream nutrient source and yield by coupling hydrological processes and nutrient budgets from an experimental headwater catchment with orchard expansion in the Changjiang River Delta area 期刊论文 OAI收割 HYDROLOGICAL PROCESSES, 2022, 卷号: 36, 期号: 8, 页码: 16 作者: Zhang, Peipei; Wang, Fang; Wang, Jianing; Yan, Weijin; Li, Yanqiang \| 收藏 \| 浏览/下载：27/0 \| 提交时间：2022/09/26 diffuse source headwater reservoir catchment modelling nutrient export coefficient nutrient yields orchard expansion
	Modelling stream nutrient source and yield by coupling hydrological processes and nutrient budgets from an experimental headwater catchment with orchard expansion in the Changjiang River Delta area 期刊论文 OAI收割 HYDROLOGICAL PROCESSES, 2022, 卷号: 36, 期号: 8, 页码: 16 作者: Zhang, Peipei; Wang, Fang; Wang, Jianing; Yan, Weijin; Li, Yanqiang \| 收藏 \| 浏览/下载：30/0 \| 提交时间：2022/09/26 diffuse source headwater reservoir catchment modelling nutrient export coefficient nutrient yields orchard expansion
	Application of a multiscale maximum entropy image restoration algorithm to HXMT observations 期刊论文 OAI收割 Chinese Physics C, 2016, 卷号: 40, 期号: 8, 页码: 86203 作者: Song, Li-Ming; Guan, Ju; Huo, Zhuo-Xi \| 收藏 \| 浏览/下载：31/0 \| 提交时间：2019/07/11 data analysis image restoration MSME diffuse X-ray source
	Application of a multiscale maximum entropy image restoration algorithm to HXMT observations 期刊论文 OAI收割 CHINESE PHYSICS C, 2016, 卷号: 40, 期号: 8 作者: Guan, J; Huo, ZX; Guan J(关菊); Song LM(宋黎明); Song, LM \| 收藏 \| 浏览/下载：23/0 \| 提交时间：2017/07/27 data analysis image restoration MSME diffuse X-ray source
	Simulating the impact of watershed management for surface water quality protection: A case study on reducing inorganic nitrogen load at a watershed scale SCI/SSCI论文 OAI收割 2014 作者: Zhang Z. 收藏 \| 浏览/下载：38/0 \| 提交时间：2014/12/24 Surface water quality SWAT model Filter strips Control plan China critical source areas nonpoint-source pollution vegetative filter strips diffuse pollution riparian buffer river-basin sediment swat phosphorus china
	The Evaluation of Hydrocarbon Potential Generation for Source Rocks by Near-Infrared Diffuse Reflection Spectra 期刊论文 OAI收割 SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 卷号: 31, 期号: 4, 页码: 955-959 作者: Zhang Yujia; Xu Xiaoxuan; Song Ning; Wu Zhongchen; Zhou Xiang \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2021/02/02 ORTHOGONAL SIGNAL CORRECTION SPECTROSCOPY COAL Source rocks Hydrocarbon potential generation Diffuse reflectance NIR
	Research on automatic Hartmann test of membrane mirror (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China 作者: Zhang P. 收藏 \| 浏览/下载：31/0 \| 提交时间：2013/03/25 Electrostatic membrane mirror is ultra-lightweight and easy to acquire a large diameter comparing with traditional optical elements so its development and usage is the trend of future large mirrors. In order to research the control method of the static stretching membrane mirror the surface configuration must be tested. However membrane mirror's shape is always changed by variable voltages on the electrodes and the optical properties of membrane materials using in our experiment are poor so it is difficult to test membrane mirror by interferometer and null compensator method. To solve this problem an automatic optical test procedure for membrane mirror is designed based on Hartmann screen method. The optical path includes point light source CCD camera splitter and diffuse transmittance screen. The spots' positions on the diffuse transmittance screen are pictured by CCD camera connected with computer and image segmentation and centroid solving is auto processed. The CCD camera's lens distortion is measured and fixing coefficients are given to eliminate the spots' positions recording error caused by lens distortion. To process the low sampling Hartmann test results Zernike polynomial fitting method is applied to smooth the wave front. So low frequency error of the membrane mirror can be measured then. Errors affecting the test accuracy are also analyzed in this paper. The method proposed in this paper provides a reference for surface shape detection in membrane mirror research. 2010 Copyright SPIE - The International Society for Optical Engineering.
	Development of a new diffuse near infrared food measuring (EI CONFERENCE) 会议论文 OAI收割 Sitxh International Symposium on Instrumentation and Control Technology: Signal Analysis, Measurement Theory, Photo-Electronic Technology, and Artificial Intelligence, October 13, 2006 - October 15, 2006, Beijing, China 作者: Zhang J.; Zhang J.; Zhang J. 收藏 \| 浏览/下载：29/0 \| 提交时间：2013/03/25 Industries from agriculture to petrochemistry have found near infrared (NIR) spectroscopic analysis useful for quality control and quantitative analysis of materials and products. The general chemical polymer chemistry petrochemistry agriculture food and textile industries are currently using NIR spectroscopic methods for analysis. In this study we developed a new sort NIR instrument for food measuring. The instrument consists of a light source 12 filters to the prismatic part. The special part is that we use a mirror to get two beams of light. And two PbS detectors were used. One detector collected the radiation of one light beam directly and the value was set as the standard instead the standard white surface. Another light beam irradiate the sample surface and the diffuse light was collected by another detector. The value of the two detectors was compared and the absorbency was computed. We tested the performance of the NIR instrument in determining the protein and fat content of milk powder. The calibration showed the accuracy of the instrument in practice.