中国科学院机构知识库网格系统: 检索

Synchrotron X-ray based particle image velocimetry to measure multiphase streamflow and densitometry 期刊论文 OAI收割
RADIATION PHYSICS AND CHEMISTRY, 2022, 卷号: 200, 页码: 8
作者: Ge,Mingming

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收藏 | 浏览/下载：42/0 | 提交时间：2022/11/21

X-ray image processing X-ray attenuation technique Vapor volume fraction Particle image velocimetry Multiphase flow measurement

An Instrument With Constant Volume Approach for In Situ Measurement of Surface Runoff and Suspended Sediment Concentration 期刊论文 OAI收割
WATER RESOURCES RESEARCH, 2021, 卷号: 57, 期号: 2, 页码: 10
作者: Zhan, Xiaoyun; Zhao, Jun; Zhu-Barker, Xia; Shui, Junfeng; Liu, Baoyuan

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收藏 | 浏览/下载：23/0 | 提交时间：2021/04/25

automated instrument constant volume in situ measurement runoff sediment concentration sediment transport

Spatial-Temporal Hidden Markov Model for Land Cover Classification Using Multitemporal Satellite Images 期刊论文 OAI收割
IEEE ACCESS, 2021, 卷号: 9, 页码: 76493-76502
作者: Liu, Chunlin; Song, Wei; Lu, Chunxia; Xia, Jianxin

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收藏 | 浏览/下载：25/0 | 提交时间：2021/08/19

Hidden Markov models Remote sensing Optimization Volume measurement Standards Satellites Licenses Hidden Markov model land cover classification multitemporal satellite images spatial-temporal information

Assessment of Four Satellite-Based Precipitation Products Over the Pearl River Basin, China 期刊论文 OAI收割
IEEE ACCESS, 2021, 卷号: 9, 页码: 97729-97746
作者: Xia, Xiaolin; Liu, Yangxiaoyue; Jing, Wenlong; Yao, Ling

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收藏 | 浏览/下载：22/0 | 提交时间：2021/08/19

Meteorology Licenses Soil measurements Microwave measurement Chirp Microwave theory and techniques Volume measurement Accuracy assessment satellite precipitation product the Pearl River Basin extreme precipitation events

Seasonal Variation of O/N-2 on Different Pressure Levels From GUVI Limb Measurements 期刊论文 OAI收割
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2020, 卷号: 125, 期号: 8, 页码: 13
作者: Yu, Tingting; Ren, Zhipeng; Le, Huijun; Wan, Weixing; Wang, Wenbin

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收藏 | 浏览/下载：24/0 | 提交时间：2020/12/07

O-N-2 volume density ratio seasonal variations GUVI limb measurement empirical model thermosphere Fourier expansion

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收藏 | 浏览/下载：27/0 | 提交时间：2020/04/08

True triaxial apparatus End friction effect Volume change measurement Stiffness Stress path

Accurate mass replacement method for the sediment concentration measurement with a constant volume container 期刊论文 OAI收割
MEASUREMENT SCIENCE AND TECHNOLOGY, 2017, 卷号: 28, 期号: 4, 页码: 7
作者: Ban, Yunyun; Chen, Tianqin; Yan, Jun; Lei, Tingwu

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收藏 | 浏览/下载：29/0 | 提交时间：2019/09/25

sediment concentration replacement method constant volume container (CVC) temperature measurement error correction

An Instrument for In Situ Measuring the Volume Scattering Function of Water: Design, Calibration and Primary Experiments 期刊论文 OAI收割
SENSORS, 2012, 卷号: 12, 期号: 4, 页码: 4514-4533
Li, C; Cao, WX; Yu, J; Ke, TC; Lu, GX; Yang, YZ; Guo, CY

收藏 | 浏览/下载：54/0 | 提交时间：2013/08/28

ocean optics scattering measurements array detection calibration test in-field measurement scattering volume optical radiometric calibration

Laser pulse coded signal frequency measuring device based on DSP and CPLD (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, May 24, 2011 - May 26, 2011, Beijing, China
作者: Zhang H.-B.; Wang T.-F.; Guo R.-H.; Li Y.; Li Y.

收藏 | 浏览/下载：37/0 | 提交时间：2013/03/25

Laser pulse code is an anti-jamming measures used in semi-active laser guided weapons. On account of the laser-guided signals adopting pulse coding mode and the weak signal processing it need complex calculations in the frequency measurement process according to the laser pulse code signal time correlation to meet the request in optoelectronic countermeasures in semi-active laser guided weapons. To ensure accurately completing frequency measurement in a short time it needed to carry out self-related process with the pulse arrival time series composed of pulse arrival time calculate the signal repetition period and then identify the letter type to achieve signal decoding from determining the time value number and rank number in a signal cycle by Using CPLD and DSP for signal processing chip designing a laser-guided signal frequency measurement in the pulse frequency measurement device improving the signal processing capability through the appropriate software algorithms. In this article we introduced the principle of frequency measurement of the device described the hardware components of the device the system works and software analyzed the impact of some system factors on the accuracy of the measurement. The experimental results indicated that this system improve the accuracy of the measurement under the premise of volume real-time anti-interference low power of the laser pulse frequency measuring device. The practicality of the design reliability has been demonstrated from the experimental point of view.

Research on volume measurement technology for rail tanker based on computer vision 会议论文 OAI收割
2011 International Conference on Mechatronics and Applied Mechanics（ICMAM2011）, Hong Kong, Hong kong, December 27-28, 2011
作者: Zhao JB(赵吉宾); Xia RB(夏仁波); Liu WJ(刘伟军); Fu T(付涛); Huang YJ(黄以君)

收藏 | 浏览/下载：20/0 | 提交时间：2012/10/24

Algorithms Surface reconstruction Tankers (ships) Titration Volume measurement