Sharif Digital Repository

In this era, competition in economic fields is undeniable. According to huge amount of foreign trades between countries, economic prosperity of each country causes persuasion of foreign investors to come into that country for investment. Stock Exchanges is one sign of economic prosperity in each country, So prediction of the stock exchanges situation is very important. It is noteworthy that according to the importance of prediction in partial level, the necessity of predicting companies stock price is realized. According to the complicated term in this field, linear methods do not have appropriate efficiency for predicting, so nonlinear methods and especially Artificial Neural Networks are... 

There is increasing demand for water due to rising world population. In addition, lower supplies of water under varying hydrological condition because of changing climate, renders further stress on an already over-allocated water resource. Thus, this condition would exacerbate water supply-demand conflicts resulting in penalties on local economy. On the other hand fresh water as a scarce resource requires comprehensive management. To maintain fresh water resources, systems need principles of ecologically sustainable development that keeps environmental uses as legal. Hence, in this situation there is a need to develop appropriate methods to minimize the climate change consequences and... 

An increase of wastewater treatment plants and wastewater treatments methods have increased the importance of selection of best wastewater treatment alternative. This selection should not be merely based on the quality of effluent, but the whole factors (economic, environmental, technical and social factor) should be considered. Different methods for the assessment of wastewater treatment plants is used. For example, life cycle assessment is used for the evaluation of environmental impacts or cost-benefit analysis are used for economic analysis. But, for selection of the most sustainable technology whole factors should be evaluated together. Multi-criteria decision-making methods can be... 

In mutual funds, due to the liquidity advantage, investors can trade their assets without paying cost. Flows dilute the effect of returns because funds cannot be invested immediately in high-risk assets or the fund manager cannot implement the optimal strategy. The effect of diluting cash flows can affect the fund's future performance and reduce shareholder returns. The effect of diluting the fund of flows in Iran is a very small amount of 0.08% per year, which is different from zero at a significant level of 5%, but economically this number is small and insignificant. Of course, the policies of investment funds and the pricing model of the value of the fund's assets can affect it and affect...