Affine projection algorithms (APAs) are popular in echo cancellation due to its fast convergence. Proportionate APA (PAPA) and improved APAP (IPAPA) have been proposed recently to enhance the performance of APAs based on the concept of assigning different effective step-sizes to the tap coefficients. Conventional IPAPA is found to be able to outperform PAPA by using a proper control parameter. ...

Workflow languages offer constructs for coordinating tasks. Among these constructs are various types of splits and joins. One type of join, which shows up in various incarnations, is the OR-join. Different approaches assign a different (often only intuitive) semantics to this type of join, though they do share the common theme that branches that cannot complete will not be waited for. Many syst...

COVID-19 impact on the main global stock indexes The aim of study is to examine information lockdown connected with indexes. hypothesis was: it a strong announcement at time its or cancelation. Panel event models were used verify hypothesis. data from Thomson Reuters Database for period 2.01.2019–10.05.2020. analysis was based papers and reports literature behavioral finance.

This paper presents an improved soft feedback interference cancelation scheme which is used in matched filtered minimum mean squared error (MF-MMSE) turbo equalization. In the iterative receiver, a kind of combined prior information and a dynamic updating method are adopted to improve the performance. Simulation results show that the proposed scheme can achieve 0.25 to 0.5 dB performance gain o...

The notion of commitment is central to understanding agents and multi-agent systems. A related notion arises in databases and distributed computing. We compare the two notions, and propose a synthesis, which combines the best properties of both. Our synthesis involves a generalization of spheres of control. We show how multiagent systems can function as generalized spheres of commitment, addres...

Compton scattering by pion: there is no room for the off–shell effects. Abstract We show that the off–shell contributions in Compton scattering by pion may exist only in the single exchange diagrams. These contributions are canceled completely in the total gauge–invariant amplitude as it confirmed by one–loop calculations. It explains, in particular, some results of the chiral pertubation theor...