In the empirical literature, stationary and nonstationary behavior has been reported for the U.S. real interest rate over di¤erent time periods. We examine its long-run properties, through estimation of the order of integration, and interpret the results in light of the Taylor rule for monetary policy. When concentrating on the post-October 1987 period, our analysis suggests that the business c...

one of the most important and valuable goal of software development life cycle is software cost estimation or sce. during the recent years, sce has attracted the attention of researchers due to huge amount of software project requests. there have been proposed so many models using heuristic and meta-heuristic algorithms to do machine learning process for sce. cocomo81 is one of the most popular...

We study asymptotics of parameter estimates in conditional heteroscedastic models. The estimators considered are those obtained by minimizing certain functionals and those obtained by solving estimation equations. We establish consistency and derive asymptotic limit laws of the estimators. Condition under which the limit law is normal is studied. Further, bootstrap for these estimators is discu...

Prognostics and remaining useful life (RUL) estimation for lithium-ion batteries play an important role in intelligent battery management systems (BMS). The capacity is often used as the fade indicator for estimating the remaining cycle life of a lithium-ion battery. For spacecraft requiring high reliability and long lifetime, in-orbit RUL estimation and reliability verification on ground shoul...

With the rapid development of science and technology, Internet, a huge network connected by networks, has occupied most our lives. The demand mobile phones is getting higher than before because smart data era. However, convenience apparently couple with replacement new types. Apple United States, Huawei China Samsung South Korea are three giants in phone industry appeal users all over world. no...