سابقه و هدف: به ­دلیل توسعه رشد جمعیت انسان، نیاز انسان منابع ضروری افزایش یافته است. فعالیت‌های مربوط صنایع همچنین کشاورزی به­ طور گسترده‌ای زمین‌های را آلوده کرده ترکیبات نفتی فلزات سنگین هر دو از آلاینده‌های رایج موجود در خاک‌هایی هستند که با فاضلاب تصفیه نشده آبیاری شده‌اند سلامت محیط زیست خطر مواجه می‌کنند. آلودگی خاک می‌تواند سبب کاهش امکان زراعت، نهایت تولید غذا برای شود. جنوب شهر تهران ...

The investigation of the climate system is one of the most exciting areas of scientific research today. In the climate system, oceanic and atmospheric flows play a critical role. Because these flows are very complex in the span of temporal and spatial scales, effective computer visualization techniques are crucial to the analysis and understanding of the flows. However, the existing techniques ...

Streamribbon is used to visualize the rotation of the fluid flow. The rotation of flow is useful in fluid mechanics, engineering and geophysics. This paper introduces the construction technique of streamribbon using the streamline which is generated based on the law of mass conservation. The accuracy of constructed streamribbons is shown through two examples. Keywords—Mass conservation, streaml...

Effects of flange size on the flow patterns of an exterior circular hood subject to the influence of various uniform cross drafts were studied in an apparatus consisting of hood-model/wind-tunnel assembly. The cross draft to suction velocity ratio covered the range from 0.056 to 0.792. The flange width to hood diameter ratio spanned from 1.2 to 3.0. The hood equipped without flange was also pro...

Methods– Data acquisition. We scanned 9 healthy subjects (3F/6M, 31.25 ± 4.2y) at three time points separated by a 2 weeks interval. Diffusion-weighted EPI were acquired on a Siemens 3T Verio scanner, b = 1000 s/mm2, on 64 evenly distributed directions plus 2 b = 0 images. Pre-processing. The diffusion-weighted images were regularized and corrected for Rician noise. The diffusion tensor was est...