中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共3条，第1-3条

帮助

条数/页：排序方式：
	Comparison of radiation temperature measurement precision between middlewave and longwave thermal-imaging systems (EI CONFERENCE) 会议论文 OAI收割 2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China 作者: Sun Z. 收藏 \| 浏览/下载：30/0 \| 提交时间：2013/03/25 A comparison study on temperature measurement precision between middlewave 3-5m and longwave 8-12m measuring thermal imaging systems has been conducted. The study was limited to systems working in indoor conditions and the target's temperature is in the range of 270K900K. First the Disturb Resisting Function (DRF) of infrared systems is deduced. On the base of DRF curve we find that the middlewave infrared system get the smaller influences under the same size disturb compared with the longwave system. A theory of the influence of target's physical characteristic and measurement conditions on the accuracy of temperature measurements has been developed. On the basis of the developed formulas an analysis of the influence of signal disturbances (because of incorrectly assumed emissivity limited transmittance of the atmosphere radiation reflected by the object and shift of optics radiation) on the accuracy of temperature measurement has been made. It has been found that the middlewave systems in typical temperature range offer generally better accuracy in temperature measurement than the longwave ones do. 2012 IEEE.
	Research Progress of a New Type of potential anti-cancer drugs:ent-kaurane diterpenoids 期刊论文 OAI收割中国化学会第9届天然有机化学学术会议论文集, 2012, 页码: 1 普建新收藏 \| 浏览/下载：31/0 \| 提交时间：2013/05/03 potential:9813 Progress:1771 Research:638 drugs:325 cancer:183 family:19 throughout:18 interesting:17 years:15 genus:14 Labiatae:13 found:12 diterpenoid:12 morethan:12 world:10 literature:9 isolated:7 research:7 different:3 mainly:3
	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：33/0 \| 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.