Advanced Materials Research Vols. 219-220

Abstract: This article described the design idea, advantages and operation principle of the new high-frequency valve, designed and analyzed its mathematical model. The rotary motion and axial sliding of valve core are used to realize the independence control of excitation frequency and amplitude. The high-frequency excitation can be achieved by increasing in the number of spool table and selecting the matching relationship between the spool and sleeve valve to improve the spool valve cover window grooves and the communication times per revolution.

Abstract: With the development of teaching reform,some measures have been adopted to change the traditional teaching mode to improve learning efficiency of students. In fact, students are also required to learn autonomously by themselves with some methods. During the course of teaching reform, teachers and students are regarded as the main elements for teaching reform. But teaching materials are the connected elements for teachers and students. Due to the connection role, teachers and students can play their own roles effectively and independently. In the paper, the author tries her best to dig out effective measures to improve teaching materials reform, thus the author hopes to reflect teaching charming through teaching materials.