closely related to the research frontiers of condensed matter physics. Introducing appropriate latest progress in the
teaching can expand students’scientific level and encourage them to pursue further studies and researches. In this
paper，domain-wall resistance in ferromagnetic metals in the chapter of magnetism in solid states is taken as a typical
example and a guidance for students is provided to analyze the spin dependent transport in magnetic domain
walls. In this process， the students need to integrate the knowledge they have learned including the energy band theory，
perturbation theory and transport phenomena in quantum mechanics and solid state physics. By systematically illustrating
this typical example， the integration of the cutting-edge research of spintronics into teaching solid state
physics is demonstrated which would be a useful reference for creating a high -level， innovative and challenging
course of solid state physics.
A basic point in college physics teaching is to cultivate students' spatial imagination. Maxwell's rate
distribution law is a central content of the gas molecule kinetic theory，which is difficult for students to learn and
professors to teach during the teaching process of gas dynamics theory. Its formula is abstract，complicated and difficult
for students to understand. Based on the concept of velocity space， it is presented the surface area of the velocity
sphere is equivalent to the number of microscopic states of a single gas molecule，and the Langerian function is used
to derive the velocity distribution function of gas molecules in the ideal gas equilibrium state. This method is relatively
simple and easy for students to understand is helpful to cultivate their spatial imagination.
mass in the primitive cell on the dispersion relationship of one-dimensional three- atom chain.
The basic law of the spectral width and the frequency band gap changing with the atomic mass are established. The results show
that when the mass of only one atom in the primitive cell changes，the width of the acoustic wave spectrum decreases with the increase
of any atomic mass. The spectral width of optical waves increases with the increase of the mass of small atoms，and decreases with the increase of the mass of large atoms. Both frequency band gaps are narrowed with increasing the mass of the small atom，and widened with increasing the mass of the large atom. As the mass of the intermediate atoms increases，the frequency forbidden band between low-frequency optical waves and acoustic waves gradually is narrowed，while the frequency forbidden band between high-and low-frequency optical waves is gradually widened. The rel-evant results provide a theoretical basis for the design of crystal band-pass filters.
of the young's modulus is derived，and then it is measured experimentally. Using the value of
young's modulus as a known parame- ter and steel wire as a strain sensor of the pressure，a simple
platform scale is designed and its measuring formula is derived to measure the gravity of unknown
object. Such a design makes the traditional confirmatory experiment im- prove to a designing
experiment，reduces the experimental error and also enriches the experiment contents.
wall，the equation is deduced when the slop of the wall is K ( K≠0) . When K→∞ ，the change of liquid
level is infinite with the in- crease of rotating speed，but the rise height of liquid level is
equal to the fall depth of liquid level，and the volume relationship is a constant. when K>0，the
container is a round table with large top and small bottom. The liquid level
change caused by rotating paraboloid is limited，and the limit value is槡3 +1，when the liquid
rotation angular veloci- ty exceeds the critical angular velocity，the rotating liquid surface
is divided into two parts: the paraboloid in the middle and the water film with growing edge.
generate double - beam interference，is introduced according to the optical wave theory. The
formulae of optical path difference and phase difference have been derived; the
interference conditions and distribution laws of spots or fringes are also quantitatively
analyzed in detail. Its possible application and supplement function in teaching and researching
activ- ities are also discussed.
crude oil emulsion is studied based on the effective medium theory. The THz-TDS of emulsions with water content of 0 ～ 28 % are obtained by using the THz-TDS system. The optical parameters such as absorption coefficient and dielectric constant are calculated by
Fourier transform. The optical parameters increase with the increase of water content of emulsions. The actual dielectric constant is consistent with the dielectric constant calculated by Bruggeman's theory，and the maximum error rate is less than 3 % . The results show that when the
water content is small，the water is dispersed in the crude oil，the distance between the particles is large，and the interaction force between the particles is small. As the water content increases，the water phase and the oil phase are mixed and distributed，the distance between the
particles will become smaller，and the inter- action force of the particles will become larger.Therefore，the effective medium theory is significant to investigate the THz spectrum of oil-water emulsions.
talent train- ing program in combination with the professional competence training. The changes
of class hours and learning situ- ation make it difficult for the traditional physics teaching mode in university to effectively guarantee the quality of talent cultivation. In this paper，in view of the existing problems in teaching，the PAD ( Presentation-Assimilation
-Discussion) Class teaching mode is used to reform the teaching of college physics course and a number of teaching
measures is proposed，involving course content，learning objectives，teaching activities，teaching evaluation，etc.
A questionnaire is employed to evaluate the teaching effect. A follow-up reform scheme is also proposed according to the teaching reflection.
courses is an impor- tant research problem in education field. In this paper，the
electrodynamics course in physics major is combined with the research and the practice of
ideological and political courses construction. The contents and characteristics of this course
are organically combined，and the elements and some entry points of ideological and
political con- struction of courses are deeply excavated. Through teaching practice，some
preliminary effects are obtained which should play an active role in learning and promoting the
ideological and political construction of science courses. It can make the curriculum education
realize and also uses the course to its full play. At last，some summary and prospect
are put forward.
Universi- ty is taken as a research object. Based on the integration of science and
humanities，the fundamental task of strengthening morality education is expected to be realized
and the targets of imparting professional knowledge，re- solving doubts，propagating the doctrine and
educating people is met by applying ideological and political ideas to traditional classroom
teaching. What studied in this paper could have a certain reference value for the science
de- partments in university to carry out the construction of course-based ideological and political
irreplaceable role in the development of new engineering education and the cultivation of
interdisciplinary talents with international competitiveness. In the autumn of 2018，the physics
teaching and research office of Harbin institute of technology had carried out a comprehensive
and in-depth reform on the curriculum system，teaching content，teaching mode and other
aspects in accordance with the new requirements of talent training for new engineering
construction. After nearly two years of teaching practice，good results have been achieved.
teaching. In this paper，some examples are given to show how these tools，such as numerical
simulation，mobile phone，modern intelligent equipment，animation production platform，made the
teaching of college physics visualized. The visualized teaching of college physics can improve
the students' interest in learning. This paper presents a reference for the
visualized classroom teaching of college physics.
college physics. Rel- ying on the teaching platforms，such as Rain Classroom，Zhihuishu etc. ，the
student training process based on auton- omous learning is constructed in college physics online
course in our university. It has three stages，including preview before class，flipped classroom and
after class consolidation，and realized co-oriented education，precise teaching， gradual
progression，open discussion，independent thinking and whole-staff interaction. Furthermore，the
course is examined and promoted by platform data，supervision，students’feedback and
teachers’mutual evaluation. Over- all，the online intellectual teaching based on autonomous
learning is featured by “one center，three stages，six principles and three examinations”.
Practice results have shown that this teaching design has promoted the conver- sion from separation
to integration of in and after class teaching relying on internet information technology.
classroom in- teraction，the cultivation of students' ability to apply knowledge，and ideological and
political education. The com- bination of Tencent Classroom and Cloud Class is used for live
network teaching. Classroom management adopted multiple models，such as inviting counselors
to co-manage，introducing fault-tolerant mechanism，paying attention to students' emotional changes
and other measures to improve students' participation in the classroom. The average attendance
rate reaches 98% . The examination is based on the Super Star Learning Pass and is
conducted in the form of open-book examination with a large number of questions. By comparing
the students' scores of offline exam- ination in recent three years with that of the online
examination of this semester，it is found that the distribution of students' scores of this semester
is more reasonable，which indicates that online teaching has certain advantages.
differential equation of three-line pendulum in large swing angle motion and the
approximate treatment method of linear vibration with small swing angle are given. Under
the approximate condition about the structural dimensions of the three-line pen- dulum，the motion
differential equation，period and position probability density distribution of the three-line
pen- dulum under two different conditions of large swing angle and small swing angle are discussed.
asymmetric peri- odic potential during stepping. Based on Brownian motor theory，we numerically
simulate the motion characteristics of kinesin under certain experimental conditions by MATLAB.
Firstly，we simulate the image of the displacement and velocity changing with time of a
single kinesin. Then we respectively calculate the average speed of several ki- nesin. Finally we
calculate the ensemble average of the speed of kinesin under different loads. The simulation
re- sults show that kinesin has waiting state and walking state in directional motion，the walking
step is about 8. 2 nm， and the motion has certain randomness. Comparing with the experimental
results，it is found that the calculated re- sults of the model are in good agreement with the
of the magnetic field is vertical or parallel to the gyroscope’s shaft with reasonable
approximation. Then the general rela- tion of gyroscope deceleration damping coefficient is given
when the direction of the magnetic field is relative to any
direction of the gyroscope’s shaft with the rationality verified through the dimensional analysis.
In the experimental part，an experimental facility driven by a DC motor is designed，and the
analysis of measurement data shows that the formulae of the electromagnetic resistance moment
obtained from the basic model can describe the actual gyro- scope deceleration process more
more sen- sitive to the change of laser power，so it is more suitable for experimental teaching. In
this paper，the thermal lens effect of low-power laser is simulated by using the finite element
method，namely，the temperature field of the me- dium and the focal length of the equivalent thermal
lens are simulated，and the relationship between the focal length of low-power laser and the laser
power as well as the thermal absorption rate and thickness of the medium is quanti- tatively
explored. The simulation results are in good agreement with the experimental data，which provides a
theo- retical basis for exploring the thermal lensing effect of low-power laser.