Junjie Sun | 孙俊杰

Junjie Sun | 孙俊杰

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Future Blog Post

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This post will show up by default. To disable scheduling of future posts, edit config.yml and set future: false.

Blog Post number 4

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Blog Post number 3

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Blog Post number 2

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Blog Post number 1

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publications

2. Immobilization of uranium tailings by phosphoric acid-based geopolymer with optimization of machine learning

Published in Journal of Radioanalytical and Nuclear Chemistry, 2022

To decrease the contaminant leaching and radon exhalation from uranium tailings, a phosphoric acid-based geopolymer (PAG) precursor was selected as a solidifying agent to bind coarse sands to achieve compact structures. Machine learning was applied to explore the optimal ratio of geopolymer preparation, aimed at achieving a higher compressive strength of solidified bodies. Results showed that the maximum compressive strength of 18.964 MPa appeared at the mass ratio of 2.8 for phosphoric acid/kaolin. The uranium leaching rate of 0.70 × 10−6 cm/d on the 42nd day was three orders of magnitude less than the clay mixture-based geopolymer solidified bodies. The successful synthesis of geopolymer was evidenced by the X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), the homogeneous and dense structure of solidified bodies was characterized by the scanning electron microscopy (SEM).

Recommended citation: Zhao T, Wu H, Sun J, et al. Immobilization of uranium tailings by phosphoric acid-based geopolymer with optimization of machine learning[J]. Journal of Radioanalytical and Nuclear Chemistry, 2022, 331(9): 4047-4054.
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5. Provincial level: Third Prize in National level: Third Prize in the 14th “Challenge Cup” Hunan Province College Student Extracurricular Academic and Technological Works Competition

Published:

Challenge Cup is the abbreviation of “Challenge Cup” National College Students’ Science and Technology Competition, which is a national extracurricular academic and practical competition for college students co-sponsored by the Central Committee of the Communist Youth League, China Association for Science and Technology, Ministry of Education, Chinese Academy of Social Sciences, and the All-China Federation of Universities, and the official website of the competition is www.tiaozhanbei.net. “There are two parallel programs in China, one is ”Challenge Cup“ National Extracurricular Academic and Technological Works Competition for College Students, and the other is ”Challenge Cup” China College Students’ Entrepreneurship Plan Competition. The other is the “Challenge Cup” Entrepreneurship Program Competition for Chinese College Students. The national competitions of these two programs are held on a rotating basis, with each program being held once every two years.

4. International level: Finalist (top 2%) in The Mathematical Contest in Modeling and The Interdisciplinary Contest in Modeling (MCM/ICM)

Published:

Turn theory into practice by entering one of COMAP’s modeling contests. The study of mathematics as its own subject may have started with Pythagoras, but people have been counting as a necessity of everyday life for tens of thousands of years. It follows that mathematics was invented to help us understand and manage the world around us. COMAP’s international modeling contest opportunities at the middle school, high school, and undergraduate levels challenge students to form, organize, and manage a team to model and solve a real-world application problem and present a solution report. In addition, such contests provide an experience in which students develop interpersonal skills through teamwork, develop technical writing and communication skills, feel a sense of accomplishment, and earn an impressive resume credential.

3. National level: Third Prize in “600 LIGHT YEAR” The 15th National University Student Social Practice and Science Contest on Energy Saving & Emission Reduction

Published:

National College Students’ Energy Saving and Emission Reduction Social Practice and Science and Technology Competition is a college students’ extracurricular scientific and technological works and social practice and investigation competition organized by National College Students’ Energy Saving and Emission Reduction Social Practice and Science and Technology Competition Committee under the guidance of the Teaching Guidance Committee of Higher Educational Schools of the Ministry of Education for Energy and Power, and one of the college students’ scientific and creative competitions with the greatest influence in the national universities. It is one of the most influential competitions in colleges and universities in China. The competition is closely centered on the national major demands such as the “Double Carbon” strategic goal, and under the caring guidance of the Ministry of Education and the active collaboration of the majority of colleges and universities, the competition has developed into a national college student practice and innovation activity with a high starting point, many high-quality products, a wide range of coverage, and a great influence.

2. National level: Third Prize in The 8th National College Students’ Practical and Innovative Works Competition on Safety Science and Engineering

Published:

National Collegiate Safety Science and Engineering College Students’ Practical and Innovative Works Competition is a national competition co-sponsored by the Teaching Guidance Committee of Safety Science and Engineering of the Ministry of Education, the National Collegiate Safety Science and Engineering Academic Conference Committee, the Society for Science and Technology of Public Safety, and the China Occupational Safety and Health Association, aiming at cultivating and exercising college students’ engineering practical ability, innovation ability and teamwork spirit.

teaching

5. Granted: A Safety Emergency Device for Nuclear Power Reactors

Utility Model Patent, September 17, 2021

The utility model discloses a nuclear power reactor safety emergency device, including a steam generator, the steam generator is connected to the cooling pipe installed inside the water-cooled box through the pressure relief pipe, the pressure relief pipe is installed with a remotely adjustable safety valve, the cooling pipe is connected to the external discharge tank through the discharge pipe, the water-cooled box is interconnected to the external air-cooled tower through the water inlet pipe and the exhaust pipe and the water-cooled box is installed with a drain pipe for drainage. The device can avoid the rupture of the heat transfer tube in the steam generator, which may cause nuclear contamination, and at the same time, it can be adjusted when the pressure inside the containment rises, so that the safety valve can be opened smoothly for pressure relief.

4. Granted: A Distributed Air Purification Device with Wind-Solar Hybrid Power Supply

Utility Model Patent, February 15, 2022

The utility model discloses a distributed wind-solar complementary air purification device, including a base, the shape of which is a square box with two through ends, a dust collection frame is fixedly connected to the lower part of the base, a wind-solar power generation device is fixedly connected to the upper part of the base, a plurality of discharge adsorption boards for discharging and adsorbing dust particles are installed side by side in the base, a cleaning frame is provided on the upper side of the discharge adsorption boards and in the inner part of the dust collection frame for cleaning up the discharges. There is a cleaning frame for cleaning the discharge adsorption plate, there is an exhaust fan installed on one side of the discharge adsorption plate and inside the base, there is a filter plate installed at the air inlet and outlet of the base, and there is a drawer slidingly connected to the inside of the dust collection frame, and the utility model utilizes the solar energy and the wind pressure generated by the vehicle to obtain energy and purify the road air, which is energy-saving and environmentally friendly.

3. Patent Pending: A intrinsic Safe Emergency Lighting Device Based on the Tunnel Piston Effect

Invention Patent, July 05, 2022

The present invention discloses an intrinsically safe emergency lighting device based on the tunnel piston effect, comprising a lamp bead, an electric power system and a switching system, said switching system being connected in series between said lamp bead and said electric power system, said electric power system comprising a battery mounted in the housing of the lighting lamp and a power supply module providing power to said lamp; said switching system being used for switching one of said battery or said power supply module for said lamp bead; by installing a power detector on the battery to detect the battery power, the power in the battery is detected at all times, and when the battery is in a state of power loss, the battery is prioritized to be charged under the state of guaranteeing the normal operation of the lighting lamp, guaranteeing that the battery is always in a state of full power at all times, and avoiding the phenomenon of the battery being in a state of power loss in an emergency situation, and further improving the stability of the lighting lamp.

2. Granted: A Device and Method for Experimental Measurement of Radon Exhalation from Fissures in Radioactive Beach Surfaces

Utility Model Patent, July 26, 2024

The utility model discloses a distributed wind-solar complementary air purification device, including a base, the shape of which is a square box with two through ends, a dust collection frame is fixedly connected to the lower part of the base, a wind-solar power generation device is fixedly connected to the upper part of the base, a plurality of discharge adsorption boards for discharging and adsorbing dust particles are installed side by side in the base, a cleaning frame is provided on the upper side of the discharge adsorption boards and in the inner part of the dust collection frame for cleaning up the discharges. There is a cleaning frame for cleaning the discharge adsorption plate, there is an exhaust fan installed on one side of the discharge adsorption plate and inside the base, there is a filter plate installed at the air inlet and outlet of the base, and there is a drawer slidingly connected to the inside of the dust collection frame, and the utility model utilizes the solar energy and the wind pressure generated by the vehicle to obtain energy and purify the road air, which is energy-saving and environmentally friendly.