The paper describes a technique for modelling and optimization of ring-shaped compound ultrasonic waveguides consisting two sequentially joined segments different materials by means finite elements method. possibility using such amplifying vibrations in amplitude has been justified the paper. advantage developed consists its realization standard engineering software, particularly COMSOL Multiph...

(i) CAC iff every countable product of sequential metric spaces (sequentially closed subsets are closed) is a sequential metric space iff every complete metric space is Cantor complete. (ii) Every infinite subset X of R has a countably infinite subset iff every infinite sequentially closed subset of R includes an infinite closed subset. (iii) The statement “R is sequential” is equivalent to eac...

The objective of this paper is to obtain two results in probabilistic 2-metric space by employing the concepts (E.A)-property, conditionally compatible, semi-compatible and sub-sequentially continuous mappings. These findings improve theorem proved [5]. Further, these are substantiated supporting examples.

When translating a system description from one speciication language to another, it is, in many cases, inevitable that the underlying models of the original and the translated speciication will be diierent. The notion of property transformation can be used to deene the relation between the properties of the original and the translated model. In an earlier paper, deenitions of 'faithful' transla...

Wireless data broadcast allows a large number of users to retrieve data simultaneously in mobile databases, resulting in an efficient way of using the scarce wireless bandwidth. However, the efficiency of data access methods is limited by an inherent property that data can only be accessed strictly sequentially by users. To properly cope with the inherent property, this paper presents three pre...