scholarly journals Stochastic resonance based on frequency information exchange

2016 ◽  
Vol 65 (22) ◽  
pp. 220501
Author(s):  
Liu Jin-Jun ◽  
Leng Yong-Gang ◽  
Lai Zhi-Hui ◽  
Tan Dan
Keyword(s):  
Stochastic Resonance ◽  
Information Exchange ◽  
Frequency Information

An Improved Re-Scaling Frequency Stochastic Resonance and its Application to Weak Fault Signal Detection

2017 ◽  
Author(s):  
Jin-Jun Liu ◽  
Yong-Gang Leng ◽  
Sheng-Bo Fan ◽  
Xiao-Jun Ma
Keyword(s):  
Fault Detection ◽  
Stochastic Resonance ◽  
Information Exchange ◽  
Low Frequency ◽  
Sampling Frequency ◽  
Information Recovery ◽  
Target Signal ◽  
Frequency Information ◽  
Amplitude Coefficient ◽  
Weak Fault

Weak fault detection is crucial to incipient mechanical fault diagnosis. In order to extract weak fault signals, a method named improved Re-scaling Frequency Stochastic Resonance (IRFSR) is proposed in this paper. The method consists of four steps: (i) Frequency Information Exchange (FIE); (ii) Amplitude Coefficient Adjustment; (iii) Re-scaling Frequency Stochastic Resonance (RFSR); and (iv) Frequency Information Recovery. By means of the exchange of frequency information, the high-frequency information of the target signal is accordingly transferred to the low frequency band which can be rescaled to satisfy the small-parameter limits of classical stochastic resonance. Then IRFSR is able to overcome the limitation of RFSR, which is that the sampling frequency of RFSR is at least 50 times greater than the frequency of the target signal. Numerical results are reported to evaluate the effectiveness of IRFSR to detect the target signal with higher frequency at a low sampling frequency as compared with RFSR. And the feasibility of the IRFSR in incipient fault detection is demonstrated using case history data obtained from a sliding bearing test rig.

Information exchange in teams

2007 ◽  
Author(s):  
Stephen E. Humphrey ◽  
Susan Mohammed
Keyword(s):  
Information Exchange

Using a WWW-based Mail User Agent for Secure Electronic Mail Service for Health Care Users

1998 ◽  
Vol 37 (03) ◽  
pp. 247-253 ◽  
Author(s):  
K. Ohe ◽  
S. Kaihara ◽  
T. Kiuchi
Keyword(s):  
Information Exchange ◽  
Electronic Mail ◽  
Medical Professionals ◽  
Secure Socket Layer ◽  
User Agent ◽  
Mail Server ◽  
Hypertext Transfer Protocol ◽  
Secure Network ◽  
Mail Service ◽  
Mail System

AbstractWWW-based user interface is presented for secure electronic mail service for healthcare users. Using this method, communications between an electronic mail (WWW) server and users (WWW browsers) can be performed securely using Secure Socket Layer protocol-based Hypertext Transfer Protocol (SSL-HTIP). The mail can be encrypted, signed, and sent to the recipients and vice versa on the remote WWW server. The merit of this method is that many healthcare users can use a secure electronic mail system easily and immediately, because SSL-compatible WWW browsers are widely used and this system can be made available simply by installing a WWW-based mail user agent on a mail server. We implemented a WWWbased mail user agent which is compatible with PEM-based secure mail and made it available to about 16,000 healthcare users. We believe this approach is effective in facilitating secure network-based information exchange among medical professionals.

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