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Your search keyword '"He, Jie-Han"' showing total 3 results
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3 results on '"He, Jie-Han"'

1. Improving the machine learning based vertex reconstruction for large liquid scintillator detectors with multiple types of PMTs

Author

Li, Zi-Yuan, Qian, Zhen, He, Jie-Han, He, Wei, Wu, Cheng-Xin, Cai, Xun-Ye, You, Zheng-Yun, Zhang, Yu-Mei, and Luo, Wu-Ming

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

Precise vertex reconstruction is essential for large liquid scintillator detectors. A novel method based on machine learning has been successfully developed to reconstruct the event vertex in JUNO previously. In this paper, the performance of machine learning based vertex reconstruction is further improved by optimizing the input images of the neural networks. By separating the information of different types of PMTs as well as adding the information of the second hit of PMTs, the vertex resolution is improved by about 9.4 % at 1 MeV and 9.8 % at 11 MeV, respectively.

Published
2022

3. Research on the Mechanical Properties and Micro-Morphology of the Cement Stabilized Gravel with Rubber Particles

Author

He Jie Han, Ji Peng Zhu, Ruo Chong Yang, Teng Kuo Zhu, Kai Li, and Hong Lei Zhu

Subjects
Cement, Materials science, Scanning electron microscope, technology, industry, and agriculture, General Medicine, Static pressure, Compression (physics), Compressive strength, Natural rubber, visual_art, Volume fraction, visual_art.visual_art_medium, Geotechnical engineering, Composite material, Porosity
Abstract

The primary objective of this paper was to study the mechanical properties of the cement stabilized gravel by different compact method which added rubber particles by using macroscopic and microscopic test. Through test of compression, relationships of mechanical properties of samples were studied. Pore structure and fractal characteristic of mixture was analyzed quantitatively using mercury intrusion porosimetry (MIP), scanning electron microscope (SEM) was applied to analyze the micro-morphology of samples. The tests results showed that the compressive strength of samples which prepared by using vibrating method was greater than that by static pressure method. Compressive strength of samples from vibrating method or static pressure method decreased with the rubber particles volume fraction increase. MIP tests showed that the mean pore diameter and porosity of mixture increased from about 70nm to 250nm and 9% to 24% with the rubber particles content increasing, respectively. SEM tests showed that the interface bonding between sand and hardened cement paste was better than that of between rubber particles and hardened cement paste.

Published
2013

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