With the emergence of new Internet technologies, such as IPV6 （Internet Protocol Version 6） and Internet of things, the content of computer network course is increasing year by year and the contradiction between lim...With the emergence of new Internet technologies, such as IPV6 （Internet Protocol Version 6） and Internet of things, the content of computer network course is increasing year by year and the contradiction between limited teaching time and increasing teaching content appears. The widespread use of mobile Internet and the popularization of intelligent electronic devices make it difficult for students to focus their attention completely on the classroom. In view of the above two points, this paper redesigns the computer network classroom by using the Fanya SPOC （Small Private Online Course） teaching platform and adopting the teaching mode of flipped classroom to stimulate students＇ interest in learning and improve their learning effect.展开更多
The main design factors which effect on operating speed of solenoid actuator for valve operation are mass of plunger, electromagnetic motive force, inductance and return spring, and these factors are not independent b...The main design factors which effect on operating speed of solenoid actuator for valve operation are mass of plunger, electromagnetic motive force, inductance and return spring, and these factors are not independent but related with each other in view point of design and electromagnetic theory. It is impossible to increase the operating speed by only change the value of any one design factor. The change of any one value results in change of any value related it in various design factors. Permanent magnets are as assistant materials which make higher flux density in air gap. Electromagnetic motive force in controlled only by current. This paper presents a speed increasing design method of solenoid actuator using a solenoid, by some governing equations which are composed of electromagnetic theory and empirical knowledge, and proved the propriety by experiments.展开更多
文摘With the emergence of new Internet technologies, such as IPV6 （Internet Protocol Version 6） and Internet of things, the content of computer network course is increasing year by year and the contradiction between limited teaching time and increasing teaching content appears. The widespread use of mobile Internet and the popularization of intelligent electronic devices make it difficult for students to focus their attention completely on the classroom. In view of the above two points, this paper redesigns the computer network classroom by using the Fanya SPOC （Small Private Online Course） teaching platform and adopting the teaching mode of flipped classroom to stimulate students＇ interest in learning and improve their learning effect.
文摘The main design factors which effect on operating speed of solenoid actuator for valve operation are mass of plunger, electromagnetic motive force, inductance and return spring, and these factors are not independent but related with each other in view point of design and electromagnetic theory. It is impossible to increase the operating speed by only change the value of any one design factor. The change of any one value results in change of any value related it in various design factors. Permanent magnets are as assistant materials which make higher flux density in air gap. Electromagnetic motive force in controlled only by current. This paper presents a speed increasing design method of solenoid actuator using a solenoid, by some governing equations which are composed of electromagnetic theory and empirical knowledge, and proved the propriety by experiments.
