منابع مشابه
(3, 6) GWhD(v)-existence results
Necessary conditions for the existence of (3; 6) generalized Whist tournament designs on v players are that v ≡ 0; 1 (mod 6). For v= 6n+ 1 it is shown that these designs exist for all n. For v = 6n, it is impossible to have a design for n = 1, but for n¿ 1 it is shown that designs exist, except possibly for 73 values of n the largest of which is n = 199. A solution is also provided for the only...
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The normality equations for the Newtonian dynamical systems on an arbitrary Riemannian manifold of the dimension n ≥ 3 are considered. Locally the solution of such equations reduces to three possible cases: in two of them the solution is written out explicitly, and in the third case the equations of normality are reduced to an ordinary differential equation of the second order. Some new example...
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آب حاصل از بارش منبع تأمین نیازهای بی شمار جانداران به ویژه انسان است و هرگونه کاهش در کم و کیف آن مستقیماً حیات موجودات زنده را تحت تأثیر منفی قرار می دهد. نوسان سال به سال بارش از ویژگی های اساسی و بسیار مهم بارش های سالانه ایران محسوب می شود که آثار زیان بار آن در تمام عرصه های اقتصادی، اجتماعی و حتی سیاسی- امنیتی به نحوی منعکس می شود. چون میزان آب ناشی از بارش یکی از مولفه های اصلی برنامه ...
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A parallel algorithm for diffusion-limited aggregation (DLA) is described and analyzed from the perspective of computational complexity. The dynamic exponent z of the algorithm is defined with respect to the PRAM model of parallel computation according to T ∼ L z , where T is the running time and L the cluster size. It is argued that z = D − D 2 /3, where D is the fractal dimension and D 2 is t...
متن کاملDental Caries Status in 6-9 Years Old Children
The tooth surfaces are unique in that they are the only part of human body, which is not subject to metabolic turnover. Once formed, the teeth are, under the correct conditions, essentially indestructible, as witnessed by their importance in fossil records and forensic medicine. Yet in the living individual, the integrity of the teeth is assaulted by a microbial challenge so that dental infecti...
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ژورنال
عنوان ژورنال: Japanese Journal of Cardiovascular Surgery
سال: 1986
ISSN: 1883-4108,0285-1474
DOI: 10.4326/jjcvs.15.443