In this paper, comparisons between several mathematical interpolation methods applied on high accuracy and huge laser clouds which only represents the DTM. In order to implicate the aforementioned, a group of a variety of Laser Scanned Areas has been
chosen to represent different types of terrain including complex and flat terrain, taking into account that man-made features are not involved in this study and that different Laser Clouds density is used to make the study more general.
A different set of algorithms were applied to conclude which one is more suitable. This step was followed by the comparison between different interpolation results. The results have shown that the Points'
Density has a great impact on a manner in which the optimal interpolation method is applied.
Moreover, it has proven that the Nearest Neighbor Algorithm is the best applied method compared with the other alternatives
يبين هذا البحث أهمية الجغرافية و دورها في حماية الموارد الطبيعية و ترشيد
استغلالها، من ذلك دورها في حماية الموارد المائية و دراسة العلاقة المعقدة بين
الغلاف المائي و مختلف عناصر الوسط المحيط، و حماية الهواء و الغلاف الجوي من
التلوث، و إظهار العواق
ب الناتجة عن ذلك، و كذلك المحافظة على التربة و صيانتها
باعتبارها من العناصر الضرورية للحياة، و قاعدة مهمة للإنتاج، و مجالا مكانيًا لتنظيم
الاقتصاد و العمران، و وسطًا لحياة الإنسان و غيره من الكائنات الحية.
In some applications we try to avoid the transfer of heat by convection, especially
through monomur bricks. The solution of this problem consist in division the cavity by
putting number of columns between the two external surfaces. We've studied he
at transfer
in different profiles of monomur brick. The results of the numeric simulations are studied
by following the two approaches (local and whole). The local approach consists of
studying the heat transfer during every cavity. While the whole approach consists of study
the heat transfer in whole cavity. The numeric simulation was achieved by following the
finished volumes and Fluent program that solves the equations of the mass' conservation,
movement and energy. It's clear that the position of columns allows passing from
convective regime into conductive regime inside the cavity. The optimal solution is to
homogeneous partition by columns. Finally, we've a method allowing as to define the
heterogeneous structure (number of columns and their thickness, thickness of a variable
cavities).
The documentary credit is one of the most effective means of
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