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36 results on '"Tuo Xianguo"'

8. An improved OSEM iterative reconstruction algorithm for transmission tomographic gamma scanning

Author

He Aijing, Tuo Xianguo, Shi Rui, and Zheng Honglong

Subjects
Radiation, 010308 nuclear & particles physics, Iterative method, Computer science, Astrophysics::High Energy Astrophysical Phenomena, Attenuation, Iterative reconstruction, 010502 geochemistry & geophysics, computer.software_genre, 01 natural sciences, Transmission (telecommunications), Rate of convergence, Voxel, 0103 physical sciences, Expectation–maximization algorithm, Range (statistics), Algorithm, computer, 0105 earth and related environmental sciences
Abstract

As one of the most advanced non-destructive analytical techniques for nuclear wastes, tomographic Gamma Scanning (TGS) is able to give accurate quantitative and qualitative measurements of nuclear waste barrels. OSEM (Ordered Subsets Expectation Maximization) has been used in transmission TGS image reconstruction on account of its good reconstruction quality and ideal convergence rate. In this paper, an improved method—NMO-OSEM (Non-minimization optimization OSEM) was proposed, it's an iterative algorithm with corrected initial values optimized by non-minimization optimization method. To evaluate its performance, a TGS system is used to perform transmission measurements on barreled nuclear wastes. The results show: ①Compared with the reconstructed images by traditional OSEM under 6 transmission energies (122 keV, 344 keV, 779 keV, 964 keV, 1112 keV, 1408 keV), the improved NMO-OSEM has a great advantage in reducing the artifacts and effectively improving the quality of the reconstructed images. ②the attenuation coefficients values of 72 voxels under 3 emission energies (662 keV, 1173 keV and 1332 keV) reconstructed by the proposed algorithm are more accurate (range of error: 0.22%–13.83%) than reconstructed by traditional OSEM (range of error: 1.31%–32.21%), which proves this method has more stable reconstruction precision and could be regarded as an ideal option for real applications.

Published
2018

14. Research of the Hardware Architecture of the Geohazards Monitoring and Early Warning System Based on the Iot

Author

Nie Donglin, Yang Jiaxin, Liu Qi, Li Yan, Meng Lingyu, Tuo Xianguo, and Wang Honghui

Subjects
Hardware architecture, 021110 strategic, defence & security studies, Wireless network, Computer science, business.industry, Real-time computing, 0211 other engineering and technologies, 020206 networking & telecommunications, Wireless WAN, 02 engineering and technology, Key distribution in wireless sensor networks, GSM, Embedded system, 0202 electrical engineering, electronic engineering, information engineering, General Earth and Planetary Sciences, Wireless, business, Wireless sensor network, General Environmental Science
Abstract

For the need of improving the capacity of the geohazards monitoring, a professional monitoring system has been developed based on the Internet of things, WSN (Wireless Sensor Network) and network communication technology. The system consists of wireless sensing network, transmission network and data monitoring and analysis center. The WSN technology was used to organize network with displacement, tilt angle and rainfall in the wireless sensing network which could achieve perception and control all aspects of the monitoring area. The monitoring data can be transferred in two methods by the transmission network which was established based on the GSM and Beidou. The wireless sensing nodes can be controlled remotely by data monitoring and analysis center. For example, the acquisition interval can be modified remotely, the current data can be controlled to return immediately and sensing nodes can be controlled to entry into low power mode in order to save power, which means that Machine to Machine mode of geological disaster monitoring had been realized in the system.

Published
2017

22. Bare and polymer coated iron oxide superparamagnetic nanoparticles for effective removal of U (VI) from acidic and neutral aqueous medium

Author

Zhu, Shan, primary, Leng, Yangchun, additional, Yan, Minhao, additional, Tuo, Xianguo, additional, Yang, Jianbo, additional, Almásy, László, additional, Tian, Qiang, additional, Sun, Guangai, additional, Zou, Lin, additional, Li, Qintang, additional, Courtois, Jérémie, additional, and Zhang, Hong, additional

Published
2018
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