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- A. I. Nikiforov, V. V. Ulyanov, V. A. Timofeev, O. P. Pchelyakov
- Microelectronics Journal
- 2009

- V. V. ULYANOV
- 2003

For a statistic S whose distribution can be approximated by χdistributions, there is a considerable interest in constructing improved χapproximations. A typical approach is to consider a transformation T = T (S) based on the Bartlett correction or a Bartlett type correction. In this paper we consider two cases in which S is expressed as a scale mixture of a… (More)

- V. V. Ulyanov
- 1994

Let f be a polynomial in k variables and S n be a normed sum of independent identically distributed random vectors X 1 ; X 2 ; : : : ; X n taking values in R k. Upper bounds for jE expfit f (S n)gj are derived provided that either the distribution of X 1 has a nondegenerate discrete component or the distribution of S n 0 has an absolutely continuous… (More)

- A I Yakimov, A I Nikiforov, A V Dvurechenskii, V V Ulyanov, V A Volodin, R Groetzschel
- Nanotechnology
- 2006

The effect of Ge deposition rate on the morphology and structural properties of self-assembled Ge/Si(001) islands was studied. Ge/Si(001) layers were grown by solid-source molecular-beam epitaxy at 500 °C. We adjusted the Ge coverage, 6 monolayers (ML), and varied the Ge growth rate by a factor of 100, R = 0.02-2 ML s(-1), to produce films consisting of… (More)

- F G Otze, Yu V Prohorov, V V Ulyanov
- 2007

Let X be a random variable with probability distribution P X concentrated on ?1; 1] and Q(x) be a polynomial of degree k 2. The characteristic function of a random variable Y = Q(X) is of order O(1=jtj 1=k) as jtj ! 1 if P X is suuciently smooth. In comparison for every " : 1=k > " > 0 there exists a singular distribution P X such that every convolution P… (More)

310077, Ukraine E-mail addresses: vladimir.v.ulyanov@univer.kharkov.ua aptm@kharkov.ua Spin coherent states play a crucial role in defining QESM (quasi-exactly solvable models) establishing a strict correspondence between energy spectra of spin systems and low-lying quantum states for a particle moving in a potential field of a certain form. Spin coherent… (More)

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