Cylindrical parts stress study based on the bottom geometry shape

study of hash functions based on chaotic maps

توابع درهم نقش بسیار مهم در سیستم های رمزنگاری و پروتکل های امنیتی دارند. در سیستم های رمزنگاری برای دستیابی به احراز درستی و اصالت داده دو روش مورد استفاده قرار می گیرند که عبارتند از توابع رمزنگاری کلیددار و توابع درهم ساز. توابع درهم ساز، توابعی هستند که هر متن با طول دلخواه را به دنباله ای با طول ثابت تبدیل می کنند. از جمله پرکاربردترین و معروف ترین توابع درهم می توان توابع درهم ساز md4, md...

Study of the Resistive Wall Mode in Cylindrical Geometry

The problem of the resistive wall mode (RWM) is studied in cylindrical geometry and compared to experimental observations from HBT-EP tokamak. In HBT-EP, a dynamical RWM plasma response is studied by applying static, rotating and phase-flip external magnetic perturbations. The plasma response to the applied perturbation is included via the permeability matrix, P = 1/(−s+iα). Here, s is the norm...

Detection and recognition of contour parts based on shape similarity

Due to distortion, noise, segmentation errors, overlap, and occlusion of objects in digital images, it is usually impossible to extract complete object contours or to segment the whole objects. However, in many cases parts of contours can be correctly reconstructed either by performing edge grouping or as parts of boundaries of segmented regions. Therefore, recognition of objects based on their...

Parts Shape Recognition Based on Improved Harris Corner Detection Algorithm

Harris corner detection algorithm called Harris corner detector is a very effective corner algorithm for gray-scale images. The corners extracted by Harris corner detector are stable, reliable, homogeneous and reasonable. However, it has own inevitable limitations. For the shape recognition of parts, an improved Harris corner detector is proposed in this paper. Based on the analysis of Harris c...

Shape Similarity Measure Based on correspondence of visual parts