Evaluating the correlation between changes in design rainstorms and extreme rainstorm events under climate change facilitates flood control disaster reduction. Based on daily rainfall data of 609 stations during 1958–2017, Pearson-III curve, least square method, F-test, other methods were adopted to study response over nearly 60 years China, explore capacity engineering change. The conclusions ...

Background: Rainfall is the main source of water on earth’s surface. It infiltrates and percolates deep into soil for groundwater recharge. Rainfall patterns, amounts, durations, intensities can vary daily, monthly, annually, spatially. therefore important to accurately estimate rainfall return periods, which be employed in hydraulic design flood control measures.</n...

introduction: drought is a creeping natural phenomenon, which can occur in any region. such phenomenon not only affects the region subjected to drought, but its adverse effects can also be extended to other adjacent regions. this phenomenon mainly starts with water deficiency (say less than long- term mean of variable under study such as rainfall, streamflow, groundwater level or soil moisture)...

conclusions the results of this study show the factors related to the return-to-work after bc treatment in working women in mashhad city, iran. these predictors should be taken into account in order to improve the patient’s life quality. background most women are diagnosed with breast cancer (bc) when they are still at the appropriate age for employment. the increasing survival rates of patient...

The RER which is theoretically influenced by the real interest rate differential (RRE) and currency excess return (CER), is statistically examined during 1990-2016. Accordingly, the stationarity of RER as null hypothesis is not approved in the Iranian economy. Therefore, the TVAR method is examined to analyze the nonstationary RER sample to two sub-periods stationary process which are both stat...

We propose an unconditional non-parametric approach to the simultaneous estimation of volatility and expected return. By means of a detailed analysis of the returns of the Standard & Poors 500 (S&P 500) composite stock index over the last fifty years we show how theoretical results and methodological recommendations from the statistical theory of non-parametric curve inference allow one to cons...