فهرست مطالب mehdi madanchi

The purpose of this study was to design a new model for predicting the Tehran Stock Exchange index using pattern recognition in a combination of hidden Markov model and artificial intelligence. The present study is an applied type and mathematical analytical method. Its location is the Tehran Stock Exchange and during the years 2010 to 2020. Findings showed that the prediction error rate with artificial neural network has a higher accuracy than Markov's hidden model. Also, the prediction error of the hybrid model is much lower than the other two models for predicting the total stock index of Tehran Stock Exchange, so it has higher accuracy for forecasting stocks. According to the MAPE index, the hybrid model method could improve the predictive power of the artificial neural network by 0.044% and also improve the predictive power of the hidden Markov model by 0.70%.

In the investment culture, there is a consistent principle that capital is risky and risky and tends towards profitability. This study examines the efficiency and risk taking into account liquidity variables and liquidity risk based on the function of debt management model for the period 1391-1396. The purpose of this research is to use the target and the dimension of the correlation of the time series and the information gathering using library studies. Using the secondary data extracted from the financial statements of the company's investment financing specialist holdings Analyzes the correlation relationship. The statistical population of this research is the specialized housings of social security investment company (SHASTA). The researcher selected all members of the community for sampling, and the collected observations. Data analysis was performed using the multivariate regression model presented in the study using Eviews software. The findings showed that liquidity had a negative and significant effect on returns. Also, liquidity risk of the company and liquidity risk of the market have a significant relationship with the return on debt assets.

The purpose of this study, is create a challenge and discussion concerning the existence of information about the Bitcoin price and return, which suggests the relationship of information and the strong performance it. The information trends are available at different time periods and the summary data related to the statistical descriptions for the price and return index are also discussed. In this paper we show a significant correlation between the price trend and return in the Bitcoin that has been confirmed by various statistical methodology. Using statistical tests and reviewing trends and relationships between the variables, planning can be done to invest in it and its performance or inefficiency can be tested. The results of this research shows a significant and positive relationship between the price and return of Bitcoin.

Financing is one of the essential necessitates for science and technology development that many universities have paid attention to it and through establishing financing funds including endowment funds have realized this important issue. So endowment today has played a crucial role in financing and the issue of endowment, benefactors and strategic position of benefactors and donors has been one of the main discourses of Science Ministry in staff and planning area.
Endowment considering religious, cultural and historical characteristics of Iran always has been paid attention from benefactors of this territory. Currently, much of endowments are in the form of constant assets, properties and real estate. Given the changing functions of endowment constant assets and people’s needs over time, in many cases using incomes and benefits of dedicated assets along with benefactor’s initial objectives isn’t possible and it has made them static and blocked. As development of education, particularly in higher education section and performing scientific and applied researches and producing science, in view of increasing development of technology can’t be afforded by government and requires public wide participation. This article investigates necessities of establishing endowment funds, potential limitations of establishing endowment funds and also investigates different grounds for setting up such funds in order to development of education and research and considering different involved issues in this area, pattern of endowment financing as scientific findings have been presented. Research method also is based on library work and mostly study of documents, scientific foundations and analytic background.