Yue Hong

Study on the Response Characteristics of Automatic Welding Filter

To facilitate the application and development of the automatic welding filter, it is necessary to study its response characteristics. On the basis of the analysis and research about luminous transmittance and the scale number of the filter, this article proposes a solution to the specific definition of the response and holding time. By comparing different calculation methods in different standards, a felicitous way is chosen to describe the response characteristics accurately.

Upper bounds for ramsey numbers R(m ,n ,1) and R(m ,n, l, s) with parameter

In the paper some new upper bounds with parameters were obtained for the classical Ramsey numbers R(m, n, l) and R (m, n ,l, s). By using the upper bounds, it was proved that 72(4,4,4)≤236.