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- Feng Qi
- 1999

In the article, some integral inequalities are presented by
analytic approach and mathematical induction. An open problem is proposed.

- Feng Qi, Bai-Ni Guo, Chao-Ping Chen
- 2006

By employing the convolution theorem of Laplace transforms,
some asymptotic formulas and integral representations of the gamma, psi and
polygamma functions, and other analytic techniques, this note… (More)

- Feng Qi
- 2013

In the paper, by establishing a new and explicit formula for computing the $n$-th derivative of the reciprocal of the logarithmic function, the author presents new and explicit formulas for… (More)

- Feng Qi, Bai-Ni Guo, Chao-Ping Chen
- 2006

The function [Γ(x+1)]1/x x ( 1 + 1 x )x is strictly logarithmically completely monotonic in (0,∞). The function ψ′′(x + 2) + 1+x 2 x2(1+x)2 is strictly completely monotonic in (0,∞).

- Chun-Fu Wei, Feng Qi
- 2015

In the paper, the authors establish several closed expressions for the Euler numbers in the form of a determinant or double sums and in terms of, for example, the Stirling numbers of the second kind.

- Feng Qi
- 2000

In the article, using the integral expression of Mathieu’s series and by some integral inequalities involving periodic functions, several new inequalities and estimates for the Mathieu’s series are… (More)

- Feng Qi
- 2012

In the paper, the author establishes some identities which show that the functions $\frac1{(1-e^{\pm t})^k}$ and the derivatives $\bigl(\frac1{e^{\pm t}-1}\bigr)^{(i)}$ can be expressed each other by… (More)

- Bai-Ni Guo, Ai-Qi Liu, Feng Qi
- 2008

In this note, an alternative proof and extensions are provided for the following conclusions in [6, Theorem 1 and Theorem 3]: The functions are decreasing in (0, ) and the function for a is… (More)

- Liang Z Xiang, Feng Qi, Dazhang Dai, Chun Xing Li, Yuanda Jiang
- Applied biochemistry and biotechnology
- 2010

Effects of simulated microgravity (SMG) on bacteria have been studied in various aspects. However, few reports are available about production of recombinant protein expressed by bacteria in SMG. In… (More)

In this paper, some sharp inequalities for bounding the gamma function ( x) and the ratio of two gamma functions are established. From these, several known results are recov- ered, refined, extended… (More)