Abstract Heavy industry, which generally uses turbomachines, often both technologies to perform high-performance vibration monitoring of its production tool. Vibration analysis is one the means used monitor health rotating machinery in operation. This part a policy forecast maintenance industrial work and diagnosis machines by taking as an example X205 circulation fan. Numerical simulation was ...

This paper describes a prediction method for the contribution of the main onboard machinery to the underwater acoustic signature of steel surface vessels that can be used during the design stage. There are two reasons for the development of this method. Firstly, a small acoustic signature is important for naval and research vessels, due to operational requirements concerning detection and inter...

with the increase of communication and financial transaction through internet, on-line signature verification is an accepted biometric technology for access control and plays a significant role in authenticity and authorization in modernized society. therefore, fast and precise algorithms for the signature verification are very attractive. the goal of this paper is modeling of velocity signal t...

On September 1991, NASA launched the Upper Atmosphere Research Satellite. In addition to its atmospheric science mission, spacecraft dynamic effects on science measurements were analyzed. The investigation included two in-flight experiments to determine how each on-board instrument, subsystem and environmental disturbance contributed to the spacecraft dynamic response and how these disturbances...

• A room temperature vibration-rotation spectrum in calculated for H 2 (15)O. decade of FTIR spectra recorded thunderstorms are analyzed the signature line at 1973.5228 cm -1 is tentatively assigned to (010) [752] – (000) transition infrared vibration–rotation isotopically modified water, 15 O, presented. Oxygen-15 has a half-life about minutes and O may be formed atmosphere during as result ph...

In structural diagnosis, one of the standard approaches is to first define the “vibrational signature” or “frequency response” of a structure under normal behaviour, and if a sensor during routine operation detects a deviation from this “vibrational signature” that is greater than some limit, it may be concluded that the structure may be damaged and remedial action must be taken. Up to the pres...