Graphene-modified melamine sponges (RGO-MSs) were prepared, as adsorbents with photothermal conversion ability, utilizing solar energy to achieve heavy oil temperature rise, viscosity reduction, and efficient adsorption recovery of highly viscous oil. The RGO-MSs were prepared through a simple impregnation method. The photothermal performance and heavy oil adsorption performances of RGO-MSs with different densities and thicknesses were observed. It was found that as the density increases, the thermal conductivity of RGO-MS increases too, leading to the increase of the average oil absorption rate. The reduction of thickness is beneficial to improving of the adsorption rate. The prepared RGO-MS with a density of 21.5 mg/cm−3 and a height of 1 cm (RGO-MS-3-1) shows excellent mechanical properties and fatigue resistance. Cyclic adsorption–desorption of RGO-MS-3-1 was achieved through extrusion/ ethanol washing. After 10 cycles of reuse through extrusion, the adsorption capacity decreased from 52.90 to 50.02 g g− 1, with a loss of 5.4%. The material was then washed with petroleum ether and ethanol in turn. Its adsorption capacity can restored to 98.8% of the initial value, showing a promising application prospect on heavy oil leakage treatment. The easily prepared RGO-MS exhibits excellent light absorption and photothermal oil adsorption properties, providing a good solution for the problem of heavy oil leakage at sea.

This paper reviews the progress in the VLBI (Very Long Baseline Interferometry) studies of Sgr A*, the best known supermassive black hole candidates with a dark mass concentration of 4x106 M⊙ at the center of the Milky Way. The emphasis is on the importance of the millimeter and sub-millimeter VLBI observations in the detection of Sgr A*'s intrinsic structure and search for the structural variation.

RCEP, through its unique rules of origin accumulation, promotes mutual tariff concessions between Korea and China, reduces trade production costs, and will further promote the negotiation of the Korea-China FTA. Focusing on the post-epidemic era, South Korea and China should strengthen the consensus on economic and trade cooperation and use the higher standard and more comprehensive RCEP agreement to achieve a mutually beneficial and win-win situation. The industrial supply chain between South Korea and South Korea is the result of the spontaneous formation of the market, mutual benefit and win-win results. Third-party markets such as the Far East can better cooperate to provide impetus for the economic development of the two countries and the recovery of the world economy.

Pop music is the trend of the Times, while classroom music is the need of social development. There is no difference between the two in social form. The emergence of pop music can drive the increasingly neglected classroom music, bring pop music into classroom music teaching through some similar musical characteristics and social background. So as to stimulate students’ interest in music, improve students’ understanding of music, and better shorten the distance between teachers and students. At the same time, it can enrich students’ knowledge of music theory and broaden their horizons. Either in the content of music, or in the form of teaching, more obvious development can be obtained.

At present, under the background of the information age, the new forms of media are becoming ever more abundant. These forms include: internet media, social media and more and these new media platforms provide a fast and convenient channel for the advancement of the music industry. These social media platforms play a great role in promoting the development of the music industry. This paper analyzes and discusses the development of the music industry and the related strategies in accordance with new media.