نتایج جستجو برای: degree elevation

تعداد نتایج: 366349  

Journal: :Applied Mathematics and Computation 2006
Abedallah Rababah Byung-Gook Lee Jaechil Yoo

We use the matrices of transformations between Chebyshev and Bernstein basis and the matrices of degree elevation and reduction of Chebyshev polynomials to present a simple and efficient method for r times degree elevation and optimal r times degree reduction of Bézier curves with respect to the weighted L2-norm for the interval [0,1], using the weight function wðxÞ 1⁄4 1= ffiffiffiffiffiffiffi...

Journal: :پژوهش های جغرافیای طبیعی 0
محمد صادق کیخسروی کیانی دانشجوی دکتری آب و هواشناسی دانشگاه اصفهان سید ابوالفضل مسعودیان استاد آب و هواشناسی دانشگاه اصفهان

introduction snow is a kind of precipitation that is formed by the condensation of moist air mass and in the condition that temperature is below freezing point. although small areas of the world are mountainous regions, these small territories play an important role in the hydrological context of river basins. in some areas snow covers and glaciers supply drinking water. monitoring and forecast...

A disk Wang-Bézier type generalized Ball curve is a Wang-Bézier type generalized Ball curve whose control points are disks in a plane. It can be viewed as a parametric curve with error tolerances. In this paper, we discuss the problem of degree reduction of disk Wang-Bézier type generalized Ball curve, that is, bounding disk Wang-Bézier type generalized Ball curves with lower degree disk Wa...

Journal: :QJM : monthly journal of the Association of Physicians 2015
O Jolobe

Given the fact that, in the ‘constricting differential . . . ’, the successful management hinged crucially on the identification of the constrictive component of pericarditis, the latter component typically characterized by marked elevation of the jugular venous pressure (JVP), it would be useful to know how elevated that parameter was in the subject of the case report. In one series, 75% of 62...

2007
Yan Wang

ABSTRACT In previous work, a periodic surface model for computeraided nano-design (CAND) was developed. This implicit surface model can construct Euclidean and hyperbolic nano geometries parametrically and represent morphologies of particle aggregates and polymers. In this paper, we study the characteristics of degree elevation and reduction based on a generalized periodic surface model. Method...

حسینی, سید حسین, حشمتی, صفورا, دانشمندی, حسن,

Objective: The purpose of the present study was to compare the serratus anterior and upper trapezius muscles activities in the shoulder abduction and scapula symmetry position in three shooting fields including archery, pistol and air rifle. Methods: Twenty­-four available shooters between 20 to 40 years old with more than 3 years of professional training history participated in this study...

2006
Qian-Qian Hu Guo-Jin Wang

Theoretical study shows that Said-Bézier generalized Ball curves (SBGB curves) are distinctly superior to Bézier curves in evaluation, degree elevation and reduction. However in practical engineering, there is no effective algorithm for explicit multi-degree reduction of SBGB curves with endpoints constraints in the world. It is going against designing and applying generalized Ball curves. In o...

Journal: :بینا 0
محمدرضا جعفری نسب mr jafarinasab ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranتهران- پاسداران- بوستان نهم- خیابان پایدارفرد (خیابان امیر ابراهیمی)- پلاک 23- مرکز تحقیقات چشم فرید کریمیان f karimian ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranتهران- پاسداران- بوستان نهم- خیابان پایدارفرد (خیابان امیر ابراهیمی)- پلاک 23- مرکز تحقیقات چشم امیر فرامرزی a faramarzi ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranتهران- پاسداران- بوستان نهم- خیابان پایدارفرد (خیابان امیر ابراهیمی)- پلاک 23- مرکز تحقیقات چشم سپهر فیضی s feizi ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranتهران- پاسداران- بوستان نهم- خیابان پایدارفرد (خیابان امیر ابراهیمی)- پلاک 23- مرکز تحقیقات چشم حسین حسن پور a hasanpoor ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranتهران- پاسداران- بوستان نهم- خیابان پایدارفرد (خیابان امیر ابراهیمی)- پلاک 23- مرکز تحقیقات چشم مهدی یاسری a yaseri ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranتهران- پاسداران- بوستان نهم- خیابان پایدارفرد (خیابان امیر ابراهیمی)- پلاک 23- مرکز تحقیقات چشم محمدعلی جوادی

purpose: to determine the sensitivity and specificity of posterior corneal elevation in discriminating keratoconus and subclinical keratoconus from normal corneas by galilei and orbscan ii diagnosed on the basis of topography. methods: three groups (keratoconus, subclinical keratoconus and normal) were evaluated with galilei and orbscan ii and results were compared to those obtained by gold sta...

Journal: :Computer Aided Geometric Design 2007
Guozhao Wang Chongyang Deng

In this paper we prove that the degree elevation of B-spline curves can be interpreted as corner cutting process in theory. We also discover the geometric meaning of the auxiliary control points during the corner cutting. Our main idea is to gradually elevate the degree of B-spline curves one knot interval by one knot interval. To this end, a new class of basis functions, to be called bi-degree...

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