جستجوی مقالات مرتبط با کلیدواژه "factor analysis" در نشریات گروه "صنایع"

Iran has the good solar energy absorption potentials because of its situation on world warm belt . This situation creates a good opportunity for using of solar power plants. This research early introduces the important criterions in three sections: economic, climate & security such as Income and expenses, air temperature, cloudy sky index, air pollution index , wind speed index, sunlight hour’s index, sunlight angle index etc. Then by questionnaire tools and expert interviews and exploring statistical data from structural equation modeling, exploratory factor analysis & confirmatory factor analysis was prioritized the main factors. In the following, it uses AHP model for calculating of the weight of criteria and sub-criteria. Then the resulting weights are integrated with the weights obtained from structural equation modeling and the final weight was calculated. In the following, based on the main geographical directions of the country (N, S, E, W, C) and the subsidiary geographical directions of the country (NE, NW, SE, SW) , a province was selected as a sample. The result of the research shows between 9 geographical directions of Iran, respectively SW , Center and SE of geographical directions of the country are the best locations for commissioning of solar power plants .

Risk parity is one of the stock portfolio selection models that has received a lot of attention since the US national financial crisis in 2008. The philosophy of this model is to allocate an equal amount of portfolio risk between the assets. In the present study, the portfolio selection model is introduced which is a combination of risk parity portfolio and factor analysis with the Markov regime-switching framework.

The portfolio selection model is introduced which is a combination of risk parity portfolio and factor analysis with the Marko. Regime-switching framework approach. Markov regime switching helps to make the covariance matrix in the objective function of the risk equality model dependent on the state variable and increase the stability of the portfolio. At the beginning of each investment period, the state variable is determined and the asset covariance matrix is calculated based on it and used in the risk equality model

The research portfolio consisting of 8 industries from the Tehran Stock Exchange in the period 1390 to 1399 shows that this portfolio has a higher sharp ratio than the mean-variance and equally weighted portfolios in market declines, it is more durable and produces less damage.

The innovation and importance of research is robustness of risk parity portfolio by considering the covariance matrix parameter with factor analysis in Markov regime-switching framework. Thus, it is expected that in different market situations, expectations from the stock portfolio will be more consistent with reality and less losses will be produced in market declines.

Due to the growing number of new media, the number of digital citizens in society is increasing day by day. A digital citizen is a citizen who has the ability to use the online services provided by the government of each country to the best of his ability. The purpose of this study was to investigate the validity and reliability of digital citizenship scale in Birjand city. The statistical population of this study was all individuals aged 18 years and older in Birjand city, of which 384 were selected by multi-stage cluster sampling. The instrument used in this research is a digital citizen questionnaire, Chui, Glassman and Kristol (2017). Content validity of the Persian version was verified according to the opinion of the experts. Factor structure of digital citizenship questionnaire was investigated using both exploratory factor analysis and confirmatory factor analysis. The exploratory factor analysis showed that 4 substances have high yields in more than one factor; these materials were eliminated, and finally the final model included four factors; Internet political activity, technological skills, critical and local-global awareness. It came out with 22 substances. For reliability of this tool, Cronbach's alpha coefficient was used, which coefficient for its components was 0.79- 0.99. Given that the validity and reliability indicators of the Persian version of the Digital Citizen scale were all favorable, it can be used as a valid and reliable tool to identify digital citizens.