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ARCH-H-101 Histoire de l'architecture : le 20ème siècle

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CNST-Y400 - Experimental Techniques for characterizations of construction materials - 18 Jan 2023

EXAM QUESTION (2022-2023)
Danny gives you a question written, you can write down the answer and defend it if you want to or just submit your answer

Danny :
-Thermoelasticity : General principle, the advantages and disadvantages. Be able to tell what each element in the formula stands for
- LVDT : General principle, advantages and disadvantages, draw and name the components
- The three types of Wheatstone bridges : Explain short the general principle and the advantages and disadvantages (--> +
sensitivity and thermal effect on lead wires)
- Explain the general idea of DIC, advantages and disadvantages
Demonstrate the GF from the Pouillet law’s


For Dimitrios, it is a discussion of more or less 10 - 15minutes, the teacher is very nice and does not ask anything in detail!
Dimitrios :
Why do we use NDE, what are the advantages
What are the steps of Liquid penetrant
What are the two different sources in radiography
Advantages and disadvantages of Radiography
Advantages and disadvantages of liquid penetrant testing
How does crack propagation impact the velocity and the attenuation in specimen
How do we measure coating using Eddy currents
Questions from the wavelength exercise session
What are the step magnetic particle testing
You are given a weld. The possible methods to indicate defects are given: Liquid Penetrant testing; Magnetic particle testing; Visual Inspection and Eddy current testing. Order those methods from best to worse in this application, and explain why
What are the main concerns in visual inspection, which factors influence the sensitivity?
Which method is used to characterize the strength of materials (--> it’s a trick question, the answer should be that there is no NDT test for the characterization of material strength because the sample should be destroyed to know the strength)



Oral - 11 Jan 2022

Theory:
Primary question:
• Explain everything you know about morphomathematics.
— Operations on binary images.
— Erosion, dilation, opening and closing.
— Hit-or-miss.
— Practical applications (OCR, Pruning).
Follow-up questions:
• What operation allows separation of non-contiguous objects?
— Labelling.
• What operation turns a binary image into a grayscale image?
— Distance transform.

Practical:
Primary question:
• Explain the pipeline used to segment brain tumors.
— Manual, optimal and otsu thresholding.
— Manually and automatically-placed markers.
— Split-and-merge watershed transform.
— Auto-level and equalization.
Follow-up questions:
• What does the otsu threshold suppose?
— A histogram with 2 bell curves or distribution concentrated in 2 regions.
• How do you use otsu in order to segment the tumor (histogram with 3 bell curves) ?
— Use multiotsu thresholding in order to define 3 classes or you disregard the black pixels (background) and end up with 2 bell curves (one representing the brain and the other, the tumors).

Oral Jan 11th, 2022 - 11 Jan 2022

Theory:
Primary question:
• Explain everything you know about morphomathematics.
— Operations on binary images.
— Erosion, dilation, opening and closing.
— Hit-or-miss.
— Practical applications (OCR, Pruning).
Follow-up questions:
• What operation allows separation of non-contiguous objects?
— Labelling.
• What operation turns a binary image into a grayscale image?
— Distance transform.

Practical:
Primary question:
• Explain the pipeline used to segment brain tumors.
— Manual, optimal and otsu thresholding.
— Manually and automatically-placed markers.
— Split-and-merge watershed transform.
— Auto-level and equalization.
Follow-up questions:
• What does the otsu threshold suppose?
— A histogram with 2 bell curves or distribution concentrated in 2 regions.
• How do you use otsu in order to segment the tumor (histogram with 3 bell curves) ?
— Use multiotsu thresholding in order to define 3 classes or you disregard the black pixels (background) and end up with 2 bell curves (one representing the brain and the other, the tumors).


Il n'y a pas de publications plus anciennes.