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One of the Series of Activities of "On the Palace of Tianyou"-Inviting the Famous Metrology Expert Academician Li Tianchu to Give a Thematic Academic Report

public time：2021-10-18 07:13:00

　　In order to create a strong academic and cultural atmosphere, cultivate the scientific spirit of the students of Jeme Tienyow Honors College, and improve their academic literacy, on the morning of November 24, 2020, Jeme Tienyow Honors College held one of the series of activities of "On the Palace of Tianyou" in the academic lecture hall on the second floor of the Machinery Building. Li Tianchu, an academician of the Chinese Academy of Engineering, was invited to give a report entitled "Quantization of International Basic Units-Definition of Constants and Response Research of Chinese Institute of Metrology". The report was hosted by Vice President Yan Xuedong, and more than 300 student representatives from Jeme Tienyow Honors College and School of Electronic and Information Engineering listened to the report.

　　At the report meeting, Academician Li Tianchu introduced the Quantization-Constantization evolution concept of the length unit meter (m) and the time unit second (s) in the seven basic units of the International System of Units (SI) in plain language. Subsequently, Academician Li used the research of the National Institute of Metrology, China as an example to illustrate their recurrence methods and development trends, and introduced the constant definition and reproduction method of the current unit Ampere (A), temperature unit Kelvin (K), mass unit Kilogram (kg), and the amount of substance Mole (mol) adopted by the 16th General Conference of Weights& Measures (CGPM) in 2018 and officially implemented on May 20, 2019. Finally, Academician Li elaborated on the influence of measurement technology on the development of science and technology and people's daily life.

　　Academician Li Tianchu pointed out that high-precision measuring instruments are of great significance to industry, scientific research, national defense, etc.; the advanced nature and accuracy of measuring technology determine whether a country has international competitiveness and the right to speak.

　　After the report meeting, Academician Li Tianchu had a face-to-face in-depth exchange with student representatives, patiently answered students’ questions, inspired students' way of understanding and thinking about basic research, and encouraged students to actively cultivate research interests, be interested-oriented, and devote themselves to learning. The students were very pleased to have such an opportunity to communicate with the master face to face, which was deeply inspired for them.

　　"On the Palace of Tianyou" is another large-scale series of activities launched by the college after the "Tianyou Afternoon Tea". It aims to build a platform for students of Jeme Tienyow Honors College to learn face-to-face from world-class masters, expand their scientific and academic horizons, and train a group of ambitious, interested, and talented young students to become future scientists and future technology leaders. "On the Palace of Tianyou" will be open to all teachers and students, and everyone is welcome to participate actively.

　　Li Tianchu, graduated from Tsinghua University in 1970, received a master's degree from National Institute of Metrology, China in 1981, and a doctorate degree from Tsinghua University in 1991. Since 1981, he has been engaged in time-frequency reference, laser spectroscopy, atomic interference gravity, photoelectron and optical interferometric research in the National Institute of Metrology, China. In 2011, he was elected an academician of the Chinese Academy of Engineering. He is currently a researcher at National Institute of Metrology, China. Now he is a part-time professor and doctoral supervisor of our school.

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