Impact Des Signaux Modules Sur La Precision Des Mesures Bathymetriques Issues De Sondeurs Multifaisceaux - Modulated Signal Impact on Multibeam Echosounder Bathymetry

Superconductive Microwave Single-flux-quantum Digital Circuits and Corresponding Opto-electronic Interfaces: On-going Studies and First Experimental Results

RESUME : Les circuits numériques supraconducteurs micro-ondes, basés sur la logique à quantum de flux (logique RSFQ), offrent la possibilité de traiter les signaux de manière numérique à des fréquences de plusieurs dizaines de GHz. Un exemple d'application bénéficiant des avantages de cette technologie concerne les SQUIDs numériques. Ces SQUIDs peuvent être utilisés pour la magnétométrie avec u...

Accurate characterization of intermodulation noise in multi carrier wide band power amplifiers based on a digital synthesis of pseudo noise gaussian stimuli

This paper presents an accurate technique for the characterization of intermodulation noise in wide band multi carrier power amplifiers. Band limited pseudo noise stimuli which are generated by using a computer controlled arbitrary waveform generator (AWG) connected to an I/Q modulator drive the input of the amplifier under test ( AUT ). The complex envelopes of the pseudo noises are measured u...

Reliability of the Impact- Echo Method on Thickness Measurement of Concrete Elements

The present study aims at the applicability and examining the reliability of the impact-echo method on thickness measurements with reference to the geometry of the specimen and sampling data measurements. The accuracy of impact-echo thickness measurement derives from measuring not one but multiple wave reflections, and from the possibility of repeatable and reproducible waveforms. Studies have ...

Mise en application des théories sur l'extraction de la toxine tétanique endocellulaire. C II. Action de la trypsine

Maladies contagieuses non parasitaires-sur une nouvelle méthode de vaccination contre la pasteurellose des bovins et des buffles