Students' thinking in physics learning has changed from junior high school to senior high school. However, the teaching method of physics in senior high school has not changed with the change of students' thin...Students' thinking in physics learning has changed from junior high school to senior high school. However, the teaching method of physics in senior high school has not changed with the change of students' thinking mode. As a result, students have difficulties in the process of acceptance and their grades have declined. With the development of curriculum reform, traditional teaching has not adapted to the transition requirements of junior high school. This paper applies the research methods of interview, observation and comparison to dissect students' learning behavior, teachers' teaching behavior, teaching materials and other aspects, trying to find out the reasons for the "gap" in physics classroom teaching in junior and senior high schools, and puts forward the solutions to the problem.展开更多
Since the discovery of carbon dots(CDs)in 2004,the unique photoluminescence phenomenon of CDs has attracted widespread attention.However,the molecular weight of CDs has not been adequately quantified at present,due to...Since the discovery of carbon dots(CDs)in 2004,the unique photoluminescence phenomenon of CDs has attracted widespread attention.However,the molecular weight of CDs has not been adequately quantified at present,due to CDs are atomically imprecise and their molecular weight distribution is broad.In this paper,a series of Pluronic-modified CDs were prepared and the structure of the CDs was briefly analyzed.Subsequently,a molecular weight measurement method based on colligative properties was developed,and the correction coefficient in the algorithm was briefly analyzed.The calculated molecular weight was applied to the determination of surface adsorption capacity.This work provided a method for averaging the molecular weight of atomically imprecise particulate materials,which is expected to provide new opportunities in related fields.展开更多
文摘Students' thinking in physics learning has changed from junior high school to senior high school. However, the teaching method of physics in senior high school has not changed with the change of students' thinking mode. As a result, students have difficulties in the process of acceptance and their grades have declined. With the development of curriculum reform, traditional teaching has not adapted to the transition requirements of junior high school. This paper applies the research methods of interview, observation and comparison to dissect students' learning behavior, teachers' teaching behavior, teaching materials and other aspects, trying to find out the reasons for the "gap" in physics classroom teaching in junior and senior high schools, and puts forward the solutions to the problem.
文摘Since the discovery of carbon dots(CDs)in 2004,the unique photoluminescence phenomenon of CDs has attracted widespread attention.However,the molecular weight of CDs has not been adequately quantified at present,due to CDs are atomically imprecise and their molecular weight distribution is broad.In this paper,a series of Pluronic-modified CDs were prepared and the structure of the CDs was briefly analyzed.Subsequently,a molecular weight measurement method based on colligative properties was developed,and the correction coefficient in the algorithm was briefly analyzed.The calculated molecular weight was applied to the determination of surface adsorption capacity.This work provided a method for averaging the molecular weight of atomically imprecise particulate materials,which is expected to provide new opportunities in related fields.
