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Issue Info: 
  • Year: 

    1386
  • Volume: 

    14
Measures: 
  • Views: 

    941
  • Downloads: 

    0
Abstract: 

تحقیقات انجام شده نشان می دهد که مورفولوژی استخوان بستگی به بارهای مکانیکی وارد به آن دارد، فرآیندی که این وابستگی را کنترل می کند «نوسازی» نامیده می شود. با توجه به پیروی استخوان از اصول بهینه سازی، در این مقاله از روش بهینه سازی ساختاری Level Set برای مدلسازی همزمان فرآیند های نوسازی داخلی و خارجی استخوان پروکسیمال فمور استفاده شده است. همچنین برای بررسی اثر وجود تخلخل و در نتیجه دانسیته ظاهری متغیر در شکل استخوان اسفنجی مدلساری ها در دو مرحله، مرحله اول با فرض دانسیته ثابت و مرحله دوم با فرض دانسیته متغیر برای استخوان، انجام شده است که نتایج حاصله نشاندهنده یکسان بودن تقریبی هندسه خارجی استخوان و تفاوت قابل ملاحظه ای در هندسه داخلی و وزن آن در دو مرحله مدلسازی است. در نهایت برای اثبات درستی روش، نتایج حاصله با نتایج تجربی حاصل از تصویربرداری اشعه ایکس و برخی از مقالات ارایه شده در این زمینه مقایسه شده است.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2013
  • Volume: 

    10
  • Issue: 

    1
  • Pages: 

    123-134
Measures: 
  • Citations: 

    0
  • Views: 

    412
  • Downloads: 

    216
Abstract: 

In this paper we present some properties of set-norm exhaustive set multi functions and also of atoms and pseudo-atoms of set multi functions taking values in the family of non-empty subsets of a commutative semi group with unity.

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Author(s): 

Smarandache Florentin

Issue Info: 
  • Year: 

    2022
  • Volume: 

    3
  • Issue: 

    4
  • Pages: 

    313-316
Measures: 
  • Citations: 

    0
  • Views: 

    63
  • Downloads: 

    11
Abstract: 

In this paper we define the Soft Set Product as a product of many soft sets and afterwards we extend it to the HyperSoft Set. Similarly, the IndetermSoft Product is extended to the IndetermHyperSoft Set. We also present several applications of the Soft Set Product to Fuzzy (and fuzzy-extensions)  Soft Set Product and to IndetermSoft Set and IndetermHyperSoft Set.

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Issue Info: 
  • Year: 

    2022
  • Volume: 

    48
  • Issue: 

    1
  • Pages: 

    49-62
Measures: 
  • Citations: 

    0
  • Views: 

    112
  • Downloads: 

    9
Abstract: 

In order to properly understand the subsurface structures, the issue of inversion of geophysical data has received much attention from researchers. Since accurate reconstruction of the shape and boundaries of the mass using gravimetric data is very important in some issues, it is important to use an effective and efficient method that has a high ability to draw and reconstruct the boundaries of a mass. In recent years, the level set method introduced by Asher and Stein has been widely used to solve this problem. From the expansion of the level set function in some bases of the problem, the effective number of parameters is greatly reduced and an optimization problem is created which its behavior is better than the least squares problem. As a result, the level set parameterization method will be presented for the reconstruction of inversion models. A common advantage of the parametric level set method is the careful examination of the boundary for optimum sensitivities, which significantly reduces the dimensional problem, and many of the difficulties of traditional level set methods, such as regularization, reconstruction, and basis function. Level set parameterization is performed by radial basis functions (RBF),which causes an optimal problem with an average number of parameters and high flexibility,and the computational and optimization process for Newton's method is more accurate and smooth. The model is described by the zero contour of a level-set function, which in turn is represented by a relatively small number of radial basis functions. This formulation includes some additional parameters such as the width of the radial basis functions and the smoothness of the Heaviside function. The latter is of particular importance as it controls the sensitivity to changes in the model. In this algorithm adaptively chooses the required smoothness parameter and tests the method on a suite of idealized Earth models. In this evolutionary approach, the reduction gradient method usually requires many iterations for convergence, and the functions are weakened for low-sensitivity problems. Although the use of Quasi-Newton methods to improve the level set function increases the degree of convergence, they are computationally challenging, and for large problems and relatively finer grids, a system of equations must be solved in each iteration. Moreover, based on the fact that the number of underlying parameters in a parametric approach is usually much less than the number of pixels resulting from the discretization of the level set function, we make a use of a Newton-type method to solve the underlying optimization problem. In this research, the algorithm is used to investigate its strengths and weaknesses for applying geophysical gravity data, coding and programming, and it is tested using several two-dimensional synthetic models. Finally, the method is tested on gravity data from the Mobrun ore body, north east of Noranda, Quebec, Canada. The results of this study show that the application of the optimization algorithm of the level set function will lead to a relatively more accurate and realistic detection of mass boundaries. It shows that the tested mass has spread from a depth of 10 meters to a depth of 160 meters.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Writer: 

SOLTANI ZEINAB

Issue Info: 
  • Year: 

    2016
  • Volume: 

    4
Measures: 
  • Views: 

    166
  • Downloads: 

    85
Keywords: 
Abstract: 

IN THIS PAPER, WE PROVE EXISTENCE OF FIXED POINT FOR ASYMPTOTIC GENERALIZED G-SET CONTRACTION.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    1390
  • Volume: 

    -
  • Issue: 

    1
  • Pages: 

    0-0
Measures: 
  • Citations: 

    1
  • Views: 

    270
  • Downloads: 

    0
Keywords: 
Abstract: 

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Title: 
Journal: 

LEGAL RESEARCH

Issue Info: 
  • Year: 

    2020
  • Volume: 

    23
  • Issue: 

    90
  • Pages: 

    407-430
Measures: 
  • Citations: 

    0
  • Views: 

    1459
  • Downloads: 

    0
Abstract: 

The set off is one way for discharge of obligations and has different kinds. One kind is called judicial set off, Because is announced by court and that is regulated in 18 & 142 articles of civil procedural law. despite these articles, in practice, there are many differences among lawyers about judicial set off. Some believe that these articles are applicable to absolute set off, so there is no need to submit a separate petition for claim it and in contrast, some lawyers without giving special criterion believe that some kinds of set off needs claiming by petition and the others don’ t. It seems that, claiming set off is a kind of complicated confession and leads to shifting the burden of proof, so, claiming set off as a defense doesn’ t require submit a petition and is considered as a pure defense that court is obliged to hearing it. Keywords: set off-judicial set off-discharge of obligation-shifting the burden of proof.

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Issue Info: 
  • Year: 

    2024
  • Volume: 

    15
  • Issue: 

    4
  • Pages: 

    253-268
Measures: 
  • Citations: 

    0
  • Views: 

    19
  • Downloads: 

    0
Abstract: 

Background and Aim: Image brightness heterogeneity is one of the major challenges in computer image processing that can lead to inaccurate results in image segmentation. Despite the existence of numerous segmentation methods, few studies have been conducted on the effect of brightness heterogeneity and the selection of the best color channels in segmentation. In this paper, different color spaces have been used for automatic detection of skin lesions. Methods: In this study, the LSE (Level Set Evolution) segmentation method along with intensity smoothing has been used for computer recognition of skin lesions. First, the brightness heterogeneity is reduced and a more uniform image is created. Then, the proposed segmentation divides the image domain into distinct regions. This method results in more accurate recognition of skin lesions. Results: The proposed method has been tested on 200 dermoscopic images from the known PH2 dataset using different color channels. The results show that this method performs better than other methods. Accuracy of 97%, sensitivity of 98%, specificity of 99% and Dice coefficient of 92% have been obtained. Conclusion: This method has the ability to accurately isolate and diagnose lesions and can help doctors in the treatment process of skin lesions.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    1394
  • Volume: 

    1
Measures: 
  • Views: 

    460
  • Downloads: 

    0
Abstract: 

لطفا برای مشاهده چکیده به متن کامل (PDF) مراجعه فرمایید.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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