signal operating instruction

2011 ◽  
Keyword(s):  
Operating Instruction ◽  
Signal Operating

Study of the Metal Crack Propagation by Acoustic Emission Testing

2011 ◽  
Vol 105-107 ◽  
pp. 2179-2182
Author(s):  
Wei Min Zhang ◽  
Shu Xuan Liu ◽  
Yong Qiu ◽  
Cheng Feng Chen
Keyword(s):  
Acoustic Emission ◽  
Crack Propagation ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Sensor Signal ◽  
Acoustic Emission Sensor ◽  
Axial Tension ◽  
Emission Testing ◽  
Acoustic Emission Testing ◽  
Signal Operating

Crack propagation is the main reason which leads to the invalidity of the metal components. A set of detecting equipment based on the acoustic emission method was designed, and it was mainly composed of acoustic emission sensor, signal operating circuits and signal acquisition system. Specimens of 16MnR material were manufactured and the static axial tension test of them was carried on. Acoustic emission signals from the specimen were detected by acoustic emission equipment by using piezoelectric ceramic sensor. Signal datum were acquired and operated by the acquisition system, as well as the acquisition program written for it. The final results has demonstrated that acoustic emission equipment designed for the test performed well in acquiring the signals induced by the metal crack propagation.

scholarly journals Physical layer synchronization algorithms for signal-code sequence increasing noise immunity of dvb-s2x standard vl-snr mode

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
L. A. Antiufrieva ◽  
◽  
K. K. Iansitov ◽  
A. V. Dvorkovich
Keyword(s):  
Noise Immunity ◽  
Signal To Noise Ratio ◽  
Physical Layer ◽  
Code Sequence ◽  
Signal To Noise ◽  
Synchronization System ◽  
Noise Ratio ◽  
Signal Operating

The work is devoted to expanding the noise immunity of the DVB-S2X standard and the VL-SNR mode physical layer synchronization algorithms. The article proposes a signal-code sequence that increases the noise immunity of the signal, operating down to −11 dB signal-to-noise ratio, and a synchronization system for it.

scholarly journals Anticoagulant therapy in acute lung injury: a useful tool without proper operating instruction?

Critical Care ◽  
2008 ◽  
Vol 12 (5) ◽  
pp. 179 ◽  
Author(s):  
Sebastian Rehberg ◽  
Perenlei Enkhbaatar ◽  
Daniel L Traber
Keyword(s):  
Acute Lung Injury ◽  
Lung Injury ◽  
Anticoagulant Therapy ◽  
Operating Instruction
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