Uncertainty analysis on a construction project at the Rock Valley evaluate carbon molecular sieve, using data mostly from forecasts and estimates. Due to the limited nature of the carbon molecular sieve nitrogen data and information, the actual situation in the future and this may differ, which will bring the risk of investment decision. In order to avoid or minimize the risk, we must analyze the impact of uncertainty on the project economic evaluation to determine the reliability of the project, which is the uncertainty analysis. Depending on the price of carbon molecular sieve analysis of the content and focus on faces, uncertainty analysis can be divided into break-even analysis, sensitivity analysis and probabilistic analysis. In the feasibility study, the breakeven level generally performed analysis, sensitivity analysis and probability distribution, visualization project circumstances. Shanghai new molecular sieve Limited - Chapter VIII 2014-2019 sieve zeolite y rare prospect development cycle industry competition Section 74 RE 74 y Zeolite industry a rare earth industry zeolite y 74 two economic cycles, Growth and Volatility of rare earth industry, 75 y zeolite three maturity of rare earth industry, 75 y zeolite molecular sieves y Section rare historical industry competition Summary 76 a, y-type zeolite RE industry concentration analysis of 76 two, rare earth the degree of competition in the industry zeolite y 77 carbon molecular sieve nitrogen, there is a new molecular sieve (certified), carbon molecular sieve zeolite by Shanghai new Limited. Shanghai new molecular sieve Limited (www.molsionms.com) is Shanghai's Songjiang District, elemental leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. There are new leaders in the molecular sieve with the staff warmly welcome all inquiries negotiations to create new molecular sieve a better future.