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The plastic packaging accounts for great proportion in the packaging industry, resulting in great confrontation and challenge for global carbon reduction development because of the plastic packaging wastes (PPW) generation. Thus the fully reasonable utilization of the PPW presents a positive strategy. Based on the international practical policy and demand of PPW management, the article classified the recycling and separation technology, and the reuse and utilization disposal approaches of the PPW. Firstly, it defined the PPW’s source, classification and chemical composition, focusing on the recycling and separation technology principles and practices. Then it discussed several PPW disposal approaches emphasizing on the recycling, and summarized the principles and practices of mechanical recycling, chemical recycling, and energy recycling and biodegradable utilization on the PPW. Finally, it presented a suggestion on recycling and utilization of PPW.

We prove that in dimensions three and higher the Landau-Lifshitz-Gilbert equation with small initial data in the critical Besov space is globally wellposed in a uniform way with respect to the Gilbert damping parameter. Then we show that the global solution converges to that of the Schrödinger maps in the natural space as the Gilbert damping term vanishes. The proof is based on some studies on the derivative Ginzburg-Landau equations.2010 Mathematics Subject Classification. 35Q55.

Because of the characteristic of the gray relation analysis and the advantage of the alpha-trimmed mean filter, an efficient technique for mixed noise removal in images was proposed. This algorithm can adjust the filter coefficients adaptively according to various pieces of the image features. Experiment results show that the proposed algorithm which greatly improved efficiently, it not only can remove mixed noise in image, but also can keep the details of the image.

In order to study the influence of pulsating blood flow to robot and blood vessel, UDF programming of the inlet velocity is defined as the boundary condition, and the model simulate the turbulent blood flow. Moreover, in this situation, this paper analyzes the influence caused by blood parameters for the biggest surface pressure on robot. The results are showed that the variation of pressure and velocity is different on different position at 0.08s and 0.27s, and the surface pressure of the robot become greater by the increase of blood density or viscosity.