The Importance of Learning Chinese Outside Classroom(A Study of Good Chinese Learners at The University of Hong Kong)

This is the author’s second consecutive year of doing the research.As the economy of China is booming,there is a rapid increase in the number of foreign students coming to The University of Hong Kong to learn Chinese.As Chinese is one of the popular subjects for them to choose,in 2019,there are around 1000 foreign students(undergraduates or exchange students)learning Chinese as a foreign language course.A language teacher is a facilitator and an instructor of Chinese learning for foreign students.However,in the real world,there are always some good language learners and some less talented language learners in one classroom.So,what is the secret of the good Chinese learners?What can the language instructors do in order to support good Chinese learners and help the less talented learners to learn Chinese?In the TESOL field,there are a lot of researches have been done by scholars.In the early 1970s,several researchers isolated and defined the concept of good language learner.But in teaching Chinese as a foreign language field,there are relatively fewer researches.So,from January 2017 to May 2019,I conducted a survey about good Chinese learners in CHIN9503 and CHIN9504 classes.The survey consisted of an interview with several questions and the author will discuss the result of a survey and its implications in this paper.This research is done in a macro way rather than micro way.Thus,this holistic research focuses on finding good Chinese learners rather than focusing on learners’individual differences.

Research on Influence of Motor Parameters on the Negative-Salient Permanent Magnet Synchronous Motor

The d-axis inductance(Ld)of the negative-salient permanent magnet synchronous motor(NSPMSM)is larger than the q-axis inductance(Lq).Compared with the traditional motor,the NSPMSM has the characteristics of a high overload capacity,wide speed range,and preventing permanent magnet demagnetization.Positive d-axis current(id)is applied to control positive reluctance torque when running at base speed.When the motor is running at high speed,a relatively small id can achieve speed expansion and effectively expand the motor flux-weakening range.The use of a magnetic bridge to increase the Ld and a W-type permanent magnet to reduce the Lq is proposed in this article as a novel NSPMSM rotor structure.Firstly,the working principle of the NSPMSM was determined according to the equivalent magnetic circuit.Secondly,using the finite element method,the influence of motor structure on torque and speed performance of NSPMSM was analyzed,and the motor structure was optimized.Thirdly,the effect of the internal power factor angle on the performance of the two motors is analyzed.Finally,the short circuit simulation and analysis verified that the NSPMSM has a stronger short circuit current suppression ability without sacrificing overload ability.