IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION A- SCIENCE
Year:2010 | Volume:34 | Issue:A4|Papers Count:9

A k-nacci sequence in a finite group is a sequence of group elements x0, x1, x2,…, xn,… for which, given an initial (seed) set x0, x1, x2,…, xj-1,each element is defined by   xn={ x0x1…xn-1                       for j£n<k,         xn-kxn-k=1…xn-1              for n³k.   In this paper, we examine the periods of the k-nacci sequences in Miller’s generalization of the polyhedral groups á2,2½2;qñ,án,2½2;qñ,á2,n½2;qñ,á2,2½2;qñ, for any n>2.

In this paper, we study L1 -solutions of the following two-direction poly-scale refinement equation   f(x) = SM-1m=1 S Nn=-N [c1m,nf(lmx-n)+ c-1m,nf(-lmx-n)]   We prove that the vector space of all L1 -solutions of the above equation is at most one-dimensional and consists of compactly supported functions of constant sign. We also show that any- L1 solution of the above equation is either positive or negative on its support under a special assumption. With regard to the L1 -solutions of the equation, some simple sufficient conditions for the existence of nontrivial L1 -solutions and the nonexistence of such solutions are given.

In this study, by using the notion of (V, l) -summability, we introduce and study the concepts of l- strongly summable and l-statistiacally convergent functions.

In this paper, we investigate the Goursat problem in the class C2+1 (D) Ç Cn+0 (D È P) Ç C0+0 (D È Q) for a third order pseudoparabolic equation. Some results are given concerning the existence and uniqueness for the solution of the suggested problem.

We develop a two phase sampling procedure to determine the sample size necessary to estimate the population mean of a normally distributed random variable and show that the resulting estimator has preassigned variance and is unbiased under a regular condition. We present a necessary and sufficient condition under which the final sample mean is an unbiased estimator for the population mean.

In this paper, we find the number of sides of circuits in suborbital graph for the normalizer of G0(m) in PSL (2,R), where m will be of the form 2p2, p is a prime and p º1 (mod 4). In addition, we give a number theoretical result which says that the prime divisors p of 2u2 ± 2u +1 are of the form p º1 (mod 4).

Using QCD factorization for the hadronic matrix elements, we show that existing data, in particular the branching ratios BR (`B ® J/YK) and BR (`B ® J/Yp), can be accounted for in this approach. We analyze the decay B ® J /YK (p) within the framework of QCD factorization. The calculation of the relevant hard-scattering kernels for twist-2 and twist-3 is completed. We calculate this decay in a special scale (m=mb) and in two schemes for Wilson coefficients in NLO. We consider three functions for J/Y. The twist-3 contribution involves the logarithmically divergent integral, we consider rH=0 the canceling divergent. The obtained results are in agreement with available experimental data.

The most current pursuit algorithms for moving targets which are presented so far in the literature are Pure Pursuit and Pure Rendezvous navigations. Recently, one of the present authors has introduced a geometric model for the Pure Pursuit navigation algorithm. Here, in this paper, we study a new algorithm for the pursuit navigation problem which is a combination of both of the above algorithms. We study its geometric properties, as well as the trajectories as time optimal paths. Finally, we compare this algorithm with well-known algorithms in some real examples.