Essays about: "Ran Li"

Found 4 essays containing the words Ran Li.

1. 1. Inversion of Markowitz Portfolio Optimization to Evaluate Risk

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Axel Persson; Ran Li; [2021]
   Keywords : Markowitz Portfolio Optimization; Efficient Frontier; Diversification; Asset allocation; Risk and Return; Inverse optimization; Inverse problems;

   Abstract : This project investigates the applicability of the originalversion of Markowitz’s mean-variance model for portfoliooptimization to real-world modern actively managed portfolios.The method measures the mean-variance model’s capability toaccurately capture the riskiness of given portfolios, by invertingthe mathematical formulation of the model. READ MORE

3. 2. Tracking Microplastics from Artificial Football Fields to Stormwater Systems

   University essay from Stockholms universitet/Institutionen för naturgeografi

   Author : Ran Li; [2019]
   Keywords : microplastics; artificial turfs; stormwater; runoff; rainfall; Sweden;

   Abstract : Microplastic pollution as a global environment problem in marine systems has substantially raised public concern in recent years. In 2016, the Swedish Environmental Protection Agency performed a study about potential sources and pathways of microplastics spreading to the marine environment. READ MORE

4. 3. Polymeric single Li+-ion conductors: preparation and characterisation

   University essay from Lunds universitet/Centrum för analys och syntes

   Author : Hannes Nederstedt; [2016]
   Keywords : single ion conductors; electrolytes; polymers; lithium ion batteries; polymer technology; polymerteknologi; Chemistry; Technology and Engineering;

   Abstract : Lithium-ion batteries are a common type of light-weight, rechargeable batteries. There are safety concerns because these batteries typically use an organic solvent electrolyte which presents fire hazards. By using dry polymer electrolytes, the fire hazards can be eliminated. READ MORE

5. 4. Isothermal Oxidation Study of Gd2Zr2O7/YSZ Multi-Layered Thermal Barrier Coatings

   University essay from Högskolan Väst/Avd för tillverkningsprocesser

   Author : Ran Li; [2015]
   Keywords : Multi-layered thermal barrier coating; isothermal oxidation; suspension plasma spray;

   Abstract : Conventional yttria stabilized zirconia (YSZ) are widely used in the gas turbine to protect the substrate material from high temperature. But the common YSZ top coatings have limitations at higher temperature (above 1200 ℃) due to significant phase transformation and intensified sintering effect. READ MORE