Construction of Teaching Supervision System of Applied Undergraduate Colleges and Universities under the Perspective of "Internet+".

With the wide application of "Internet +" in education and the transformation and development of applied colleges and universities, teaching supervision is an important part of colleges and universities' teaching quality assurance system. However, there are still the following problems in the actual teaching supervision. The first is emphasizing "theory" teaching rather than "practice" teaching; the second is unstable supervisory team; the third is emphasizing "supervision" rather than "guidance"; the fourth is single ways and methods of teaching supervision; the fifth is lack of integration of teaching evaluation information. In order to ensure that the teaching quality of applied undergraduate colleges and universities can meet the requirements of local social development, teaching supervision work must be rooted in reality and focused on the future to build an effective teaching supervision system. Therefore, six suggestions are put forward. The first is to attach importance to the practicality of teaching, that is, application. The second is to insist on the part-time subjectivity of the supervision team. The third is to form a supervision culture of "guidance as to the main focus, supervision as the supplement, combination of supervision, and guidance to promote teaching quality through feedback." The fourth is to implement a triple superposition of regular supervision, inspection supervision, and special supervision. The fifth is to strengthen the synergy and innovation of supervision methods. The sixth is to establish an information-based teaching supervision and management platform so as to solve the deficiencies of the teaching supervision system in application-oriented colleges and universities in function, organization, culture, methods, methods, technology, and so on.

Superoleophobic micro-nanostructure surface formation of PVDF membranes by tannin and a condensed silane coupling agent.

A tannin-based hybrid coating was coated on the PVDF membrane surface through a simple one-step co-deposition of tannin and KH550. A micro/nano hierarchical structure was formed on the PVDF membrane surface through hydrolysis/condensation of KH550 and Michael addition reaction between oxidized tannin and an amino group revealed by the field-emission scanning electron microscopy, atomic force microscopy and Fourier transform infrared spectroscopy, which established a harsh surface. Abundant hydrophilic groups and high surface roughness endowed the modified membranes with high hydrophilicity and underwater superoleophobicity. The modified PVDF membranes possess excellent oil/water separation and antifouling performance due to the underwater superoleophobicity. Moreover, the modified membrane exhibited outstanding stability.