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Siying Lin,Xiang Huang,Zhenxiang Bu,Zhihong Lin,Peiqin Xie,Xiaolong Lin,Lingyun Wang,Wenlong Lv 한국섬유공학회 2020 Fibers and polymers Vol.21 No.7
Due to its small diameter and high density, electrospun nanofiber membranes have high resistance which obstaclestheir application. In this paper, we proposed a new electrospinning method based on low-temperature, which can affect thedeposition process of electrospinning by utilizing the freezing process of steam in the receiving plate. The filling andsupporting of ice could enlarge the pores of membranes and intervals among fibers, which caused the high porosity (92 %),rough surface, fluffy structure and low pressure drop (123 Pa) of polyvinylidene fluoride (PVDF) nanofibrous membranes. The results suggested that the electrospinning method is a promising way to prepare nanofibrous membranes with high airpermeability and fluffy structure for air filtration.
Identification and management the financial risks of accumulator
Yonggang Ye,Siying Lv 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.10
This paper focuses on using building block approach to identify and management financial risks of acumulator which is a kind of high-riskand complex financial derivative. When the underlying asset pricek rise, the investors could earn a lot from accumulator contracts, on the contrary, there are huge potential risks if the price falls. At present, the accumulator causes enormous losses to lots of investors, eve resulting in bankruptcy. These investors were not fully aware of the potential risks. This paper uses financial building blocks approach to decompose the accumulator into a number of well-known financial derivatives, helping investors to analyze the potential investment risks of accumulator contracts in different economic situations. Then base on the essential characteristics of accumulator, this paper proposes and testifies the proposal of hedging, making investors be fully aware of the risks of accumulator and managing the financial risks.