As a model to provide hands-on, elementary understanding of "vortex dynamics", we introduce piecewise linear non-invertible map called twisted baker map. We show that the set hyperbolic repelling periodic points with complex conjugate eigenvalues and without are simultaneously dense in phase space. also these two sets equidistribute respect normalized Lebesgue measure, spite non-uniformity thei...

A biotechnological aerobic process is modelled as an ordinary diierential equation which, under mild assumptions, ensures invariance of the positive orthant and bound-edness of the concentrations. An adaptive controller is designed for this general class of processes so that the external substrate can be regulated by the dilution rate into a prespeciied arbitrarily small neighbourhood of a cons...

Taking 273 listed companies from 2011 to 2019 as the research sample, we have a total of 2730 balanced panel data. And uses Uncertainty Index China Economic Policy constructed by Baker et al. (2016) measure economic policy uncertainty (EPU). Besides, using Jones model and Roychowdhury's calculation method respectively, with accrual earnings management (EM) real (REM) explained variables, paper ...

We measure policy uncertainty for three small open economies and show how indices can capture important historical events, both local events such as referendums certain general elections, well global financial crises. By employing the methodology of Baker et al. (2016), we construct Scandinavian countries: Norway, Denmark Sweden. find that increased at home in world’s largest economy, US, leads...