نتایج جستجو برای: singular valve

تعداد نتایج: 161514  

مسیبی, فرشید, نصر اصفهانی, مائده,

: Existence of singular points inside the solution domain or on its boundary deteriorates the accuracy and convergence rate of numerical methods. This phenomenon usually happens due to discontinuities in the boundary conditions or abrupt changes in the domain shape. This study has focused on the solution of singular plate problems using the exponential basis functions method. In this method, un...

Journal: :iranian journal of veterinary research 2015
m. r. aslani a. ebrahimi kahrisangi f. baghban a. kazemi m. heidari

endocarditis is rarely reported in sheep and information presented for ovine endocarditis is based mostly on comparative findings in the cattle. infective vegetative endocarditis of the right heart was diagnosed in a 3-year-old fat-tailed ram. clinical findings included tachycardia, marked brisket edema, jugular veins distention and pulsation and pale mucous membranes. hematologic abnormality i...

Journal: :research in cardiovascular medicine 0
alireza alizadeh-ghavidel rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran rasoul azarfarin rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran; rajaie cardiovascular medical and research center, vali-e-asr st., niayesh blvd., tehran, ir iran. tel: +98-2123922017, fax: +98-2122663293 azin alizadehasl echocardiography research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran ali sadeghpour-tabaei rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran ziae totonchi rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran

conclusions moderate ppm has no negative effect on echocardiographic trans-aortic pressure gradients or the patients’ nyha functional status after avr with a carbomedics prosthesis in the mid-term follow up. results of the 66 studied patients, 39 were male and 27 were female. the mean age of the patients was 43 ± 17 with a range of 6 - 76 years. implanted sizes of the carbomedics av prosthesis ...

In this paper, Lagrange interpolation in Chebyshev-Gauss-Lobatto nodes is used to develop a procedure for finding discrete and continuous approximate solutions of a singular boundary value problem. At first, a continuous time optimization problem related to the original singular boundary value problem is proposed. Then, using the Chebyshev- Gauss-Lobatto nodes, we convert the continuous time op...

Journal: :iranian journal of fuzzy systems 2007
amiya kumar l shyama madhumangal pal

in this paper, some elementary operations on triangular fuzzynumbers (tfns) are defined. we also define some operations on triangularfuzzy matrices (tfms) such as trace and triangular fuzzy determinant(tfd). using elementary operations, some important properties of tfms arepresented. the concept of adjoints on tfm is discussed and some of theirproperties are. some special types of tfms (e.g. pu...

Journal: :international journal of industrial mathematics 2013
m. nikuie m. k. mirnia

in the linear system ax = b the points x are sometimes constrained to lie in a given subspace s of column space of a. drazin inverse for any singular or nonsingular matrix, exist and is unique. in this paper, the singular consistent or inconsistent constrained linear systems are introduced and the effect of drazin inverse in solving such systems is investigated. constrained linear system arise ...

A A. RAZI, D MOHAMMADI, J ZARGOUSHI,

A rare case of anterior urethral valve in association with posterior urethral valuve is reported. Clinical findings are discussed, and the available literature will be briefly reviewed.

Journal: :iranian journal of mathematical chemistry 2014
a. saadatmandi n. nafar s. p. toufighi

in chemical engineering, several processes are represented by singular boundary value problems. in general, classical numerical methods fail to produce good approximations for the singular boundary value problems. in this paper, chebyshev finite difference (chfd) method and dtm-pad´e method, which is a combination of differential transform method (dtm) and pad´e approximant, are applied for sol...

Bicuspid aortic valve is traditionally considered an innocuous congenital anomaly. Due to a better and widespread availability of non-invasive imaging techniques, it has come to the fore that 30% of these cases develop complications, viz., valve abnormality (aortic regurgitation and stenosis), and aneurysm of aortic root and ascending aorta. Sinus of Valsalva aneurysm is an uncommon complicatio...

رنجبرنژاد اصفهانی, حسن ,

In recent socio-economic state it is not possible to have different sets of prosthetic cardiac valves available in the operating room before open-heart surgery for valvular replacement. In this study the diameter of the aortic valve ring measured in 2-D echocardiography was compared with the size of the aortic prosthetic valves implanted for the patients with aortic valvular disease. The purpos...

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