Thanks
First of all, we thank Almighty God for giving us the courage, the patience and the
will to achieve our goal and carry out this humble work.
We would like to express our sincere thanks and gratitude to our supervisor Mr.
Merabet Hamza for proposing this theme, for his supervision during this work, his
understanding, his availability, his knowledge, his wise advices and all his help.
We would like to thank our Co-supervisor Ms. Keraghel Mehdia who was kind
enough to entrust us with this work, which is rich in interest and for guiding us
through each step of its realization, for the good direction of our work, and for
giving us the best of herself. We thank her for her help, advice, understanding,
patience and trust.
We express our thanks to the honorable members of the jury:
Ms. Mahdid Sonia who honored us by chairing the jury for this work.
We would like to thank Ms. Adem Amina Amel and Mr. Zerrouki Mohamed for
the honor they did us by accepting to examine our dissertation.
We sincerely thank all the personnel and engineers of the ministries and
departments who helped us to collect the necessary data for the realization of our
work.
We would also like to express our sincere gratitude and thanks to our families,
especially our parents.