نتایج جستجو برای: return periods

تعداد نتایج: 189176  

علیرضا زارعی, , احمد ابریشم‌چی, , سیدسعید اسلامیان, ,

An approach for regional low flow frequency analysis is to use multiple regression techniques for obtaining relationships between low flows with specific return periods and catchments characteristics. In this paper, this method has been used. After single-site frequency analysis for 20 stream gauging stations, homogeneity test was performed. Regional relationships between low flows with return ...

Journal: :International Journal of Financial Studies 2022

This study aims to overcome the problem of dimensionality, accurate estimation, and forecasting Value-at-Risk (VaR) Expected Shortfall (ES) uncertainty intervals in high frequency data. A Bayesian bootstrapping backtest density forecasts, which are based on a weighted threshold quantile continuously ranked probability score, developed. Developed backtesting procedures revealed that an estimated...

This paper aims to study the effect of herding on buy and hold, momentum and contrarian strategy. In this research, the cross-sectional absolute deviation is used to identify herding behavior in twenty industries in Tehran stock market. It is observed that the down and boom periods had more industries with herding. Moreover, the weak herding is more common than the strong herding in this market...

Journal: :Natural Hazards and Earth System Sciences 2020

1998
PAO-SHIN CHU JIANXIN WANG

Tropical cyclones in the vicinity of Hawaii have resulted in great property damage. An estimate of the return periods of tropical cyclone intensities is of particular interest to governments, public interest groups, and private sectors. A dimensionless quantity called relative intensity (RI) is used to combine all available information about the tropical cyclone characteristics at different pla...

ژورنال: آبخیزداری ایران 2019
mirmohammad sadeghi, seied omid, nabavianpour, mohammad,

Estimation of floods in a basin with various return periods is one of the effective management strategies for reducing flood damage. One of the methods for estimating flood discharge is to make synthetic unit hydrograph using the physical characteristics of the basin. The more accurate inputs of the model, the more validated results. Hence, in basins in which Instantaneous peak discharge is rec...

ژورنال: علوم آب و خاک 2019

Flood discharge estimation with different return periods is one of important factors for water structures design and installation. On the other hand, a lot of rivers existing in Iran watersheds have no complete and accurate hydrometric data. In these cases, one of the suitable solutions to estimate peak discharges with different return periods is the regional flood analysis. In this research, 5...

Masoud Sadri Nasab Morteza Bakhtiari, Nima Shahni Karam Zadeh Reza Nayebi

Waves are main characteristics of seas that produce by wind. Importance of the study of waves and recognizing the wave climate in the coastal zone management that the waves are the most important influence on the design and implementation of all projects. Wave are main boundary condition in dynamic loading and structural calculations and hydraulic coastal structures. Height of waves are the mos...

Journal: :تحقیقات مالی 0
حسین اعتمادی دانشیار دانشکده مدیریت و اقتصاد، دانشگاه تربیت مدرس، ایران رضا داغانی دانشجوی دکتری، دانشکده مدیریت و اقتصاد، دانشگاه تربیت مدرس، ایران مسعود عزیزخانی استادیار دانشکده مدیریت، دانشگاه ایلام، ایران سارا فرهبحش کارشناس ارشد مدیریت بازرگانی، دانشگاه آزاداسلامی، واحد تهران مرکزی،ایران

using the treynor and mazoy model (expanded by fama to evaluate management performance for asset allocation among investment units), this paper examines the management’s performance in funds and investment companies in tehran stock exchange during 2004-2010. the results do not support the application of management market timing during the study period and managers were only able to create addit...

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