Applied Mechanics and Materials Vols. 477-478

Abstract: The development of sci-tech has promoted the institutionalization of life, food safety is a subsystem of life, and it is a huge task to ensure food safety, which thus jointly puts forward new requirements for packaging technology, especially for package materials. Nowadays, the existing food packaging materials are more and more unsatisfying, and it is hoped that the packaging materials can extend the period of use of foods and ensure no extrusion on foods in the transport process, and the consumption of packaging materials can be reduced to save resources. In this paper, the consumers psychology, the purpose of packaging and corresponding requirements raised for packaging materials are analyzed, then development trend of packaging materials is explored.

Abstract: Logistics has become "the third profit source", we do the optimization research of storage system based on the power drive-through rack designed by our research group. According to the optimization model and using the Multi-Objective Genetic Algorithms, we take a logistics distribution center as an example. Introduct of cargo weight, quantity and warehousing frequency parameters, mimicing the process of natural selection, mutation and evolution in biological world, following the survival of the fittest mechanism, obtain the distribution of cargo space in Power drive-through Rack. High weight goods is in bottom shelves, making the center of goods gravity more lower. High quantity and frequency goods is near the entrances of warehouse; making the distribution become more reasonable. Improve the efficiency and utilization of warehouse.

Abstract: This research aims at investigating language learning strategies of students of English as a foreign language in China. Using the questionnaire SILL as an instrument, qualitative and quantitative research methods are used. 33 valid questionnaires of university students of Engineering Design Specialty have been collected. The data have been analyzed using SPSS Version 20. The results show that the university students of Engineering Design Specialty sometimes use the English learning strategies at medium level. They sometimes use Compensation strategies, Cognitive strategies, Metacognitive strategies, Affective strategies and Social strategies, and they generally do not use Memory strategies.