backscattering noise
Romanian translation: zgomot de reflexie difuza
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| 06:38 Oct 15, 2009 |
| English to Romanian translations [PRO] Tech/Engineering - Physics | |||||||
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|  Selected response from: Anton Popescu Local time: 05:07 | ||||||
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| Summary of answers provided | ||||
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| 5 | zgomot de reflexie difuza |
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| 5 | zgomot de retroimprastiere |
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| 4 | ecou parazit |
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| 3 | retrodifuziune |
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| Summary of reference entries provided | |||
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| Defectoscopie ultrasonică |
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Answers
20 mins confidence: 
retrodifuziune Explanation: 712.02.49 back scattering cross section (back scattering area (of an antenna)= aire de rétrodiffusion (d'une antenne)= suprafa\[ de retrodifuziune (a unei antene) Suprafa\[ de reradia\ie a unei antene de recep\ie, pentru o direc\ie opus[ celei de propagare a undei incidente. http://www.scritube.com/tehnica-mecanica/ANTENE731882122.php http://www.granddictionnaire.com/BTML/FRA/r_Motclef/index102... http://www.dictio.ro/medical/retrodifuziune |
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4 hrs confidence:
zgomot de reflexie difuza Explanation: Wikipedia: In physics, backscatter (or backscattering) is the reflection of waves, particles, or signals back to the direction they came from. It is a diffuse reflection due to scattering, as opposed to specular reflection like a mirror. Backscattering has important applications in astronomy, photography and medical ultrasonography. "Algoritmul poate fi utilizat pentru recunoaşterea ecoului dat de defect mascat de nivelul de zgomot generat de reflexia difuză" |
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1 day 1 hr confidence:
zgomot de retroimprastiere Explanation: conform disctionar de fizica englez-roman, editura tehnica. backscattering=retroimprastiere |
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1 day 6 hrs confidence:
ecou parazit Explanation: d)ecou parazit provocat de transformarea undelor longitudinale în transversale - situat dupa ecoul de fund- deoarece parcurge un drum mai lung prin sina; http://www.fml.ro/fmlpage/fmlpage_main/documents/legislatie/... + vezi mai jos. |
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Reference comments
23 hrs peer agreement (net): +1 |
| Reference: Defectoscopie ultrasonică Reference information: 2.4. În practică se folosesc frecvent următoarele metode de defectoscopie: - metoda ecoului, foloseşte trenuri foarte scurte de unde, alcătuite din oscilaţii puternic amortizate şi integrate (fig.5.a.), care se succed cu o frecvenţă suficient de mare, pentru a putea forma pe ecranul unui tub catodic cu remanenţă o imagine permanentă. Se folosesc palpatoare de emisie-recepţie (ER) cu frecvenţe mari (f>1MHz). Tehnica de examinare şi apariţia impulsurilor este prezentată pentru un palpator normal în fig.9.5.b., iar pentru un palpator înclinat în fig.9.5.c. Cu 1 s-a notat impulsul iniţial, cu 2 impulsul recepţionat în urma reflexiei la baza piesei, iar cu 3 impulsul reflectat datorită unui defect. http://mihaelabucur.blogspot.com/2008/10/sm-i-defectoscopia-... Tot articolul descrie foarte amănunţit metodele utilizate. Personal, nu aş folosi sintagma "zgomot". Fiind vorba de unde ultrasonice, ele nu pot fi percepute de urechea umană ci doar de aparatura electronică (sub forma unor impulsuri defazate în timp). -------------------------------------------------- Note added at 1 zi2 ore (2009-10-16 08:43:53 GMT) -------------------------------------------------- vezi si Art. 36 din http://www.fml.ro/fmlpage/fmlpage_main/documents/legislatie/... -------------------------------------------------- Note added at 1 zi6 ore (2009-10-16 12:46:44 GMT) -------------------------------------------------- in plus> back-scattering Definitions: (DOD) Radio wave propagation in which the direction of the incident and scattered waves, resolved along a reference direction (usually horizontal), are oppositely directed. A signal received by back-scattering is often referred to as "back-scatter." http://www.dtic.mil/doctrine/jel/doddict/data/b/2715.html |
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