and Applied Analysis 3 and finally finds and extracts the frequency of unknownweak cycle signal in the frequency domain. 3. Adaptive Stochastic Resonance Detection for Low-Frequency Signals 3.1. Measurement Index and Iterative Algorithm. Adaptive stochastic resonance signal detection involves two important factors: measurement index and iterative algorithm. (1) Measurement Index. Selecting the ...

A new heterodyne nano-displacement with error reduction is presented. The main errors affecting the displacement accuracy of the nano-displacement measurement system including intermodulation distortion error, cross-talk error, cross-polarization error and phase detection error are calculated. In the designed system, a He-Ne laser having three-longitudinal-mode is considered as the stabiliz...

This paper gives an overview of recently developed frequency domain measurement and modelling techniques for non-linear microwave components. The system architecture and measurement capabilities of the Hewlett-Packard “Nonlinear Network Measurement System” are described. Three modelling techniques, based on the new instrument measurement data, are discussed: empirical models, statespace models ...

noise exposure is one of the main problems in petroleum industry. petroleum in dustry is a strategic industry in iran with large number of workers whom are exposed to different noise sources. identification and evaluation of this noise sources and reducing excessive noises are big issues in petroleum industry from point of occupational health. this descriptive-analytic study was performed in th...