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Wenlu Guo,Xiangguo Meng,Yan Liu,Liang Ni,Zhaoyong Hu,Rui Chen,Minjia Meng,Yun Wang,Juan Han,Min Luo 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The new 8-hydroxyquinoline (8-HQ) modified magnetic mesoporous carbon (8-HQ-Ni-CMK-3) wasprepared and applied for adsorption of multivariate metal ions from aqueous solution. The preparedadsorbent was characterized by Fourier transform infrared, X-ray diffraction, scanning electronmicroscopy, transmission electron microscope, nitrogen adsorption-desorption isotherm, elementalanalysis, and vibrating sample magnetometer. The static adsorption behaviors toward multivariatemetal ions on graphite, the modified graphite by 8-HQ, magnetic mesoporous carbon, and 8-HQ-Ni-CMK-3 were compared, which showed that 8-HQ-Ni-CMK-3 had excellent adsorption capacity. Theremoval of multivariate metal ions using 8-HQ-Ni-CMK-3 by fixed-bed column was further investigated.
A Novel Curved-Coil Transmitter for Quasiomnidirectional Wireless Power Transfer
Guo Bochao,Zhao Yubo,Chen Wei,Guo Ni,Tian Zijian 한국전자파학회 2023 Journal of Electromagnetic Engineering and Science Vol.23 No.2
Achieving stable power transfer by merely relying on quasi-omnidirectional couplers is challenging. In this paper, we propose a quasi-omnidirectional wireless power transfer (QWPT) system with a novel curved-coil transmitter to achieve steady transmission performance. A single power source is used to drive the transmitter's current without using a phase and current control methodology. Power is transmitted to the receiver through magnetic resonant coupling at a distance of 50 mm. Moreover, an equivalent circuit model of the curved-coil system is derived and mathematically analyzed. The mutual inductance of the proposed QWPT system is evaluated through analysis and experiments. The experimental results for the resonant coupling system confirm the theoretical analysis of the performance of the curved-coil transmitter and quasi-omnidirectional power transfer.
ON COMPLETE MONOTONICITY OF LINEAR COMBINATION OF FINITE PSI FUNCTIONS
Guo, Bai-Ni,Qi, Feng Korean Mathematical Society 2019 대한수학회논문집 Vol.34 No.4
In the paper, the authors supply complete monotonicity of linear combination of finite psi functions and extend some known results.
Guo, Bai-Ni,Qi, Feng Korean Mathematical Society 2011 대한수학회지 Vol.48 No.3
A class of functions involving divided differences of the psi and tri-gamma functions and originating from Kershaw's double inequality are proved to be completely monotonic. As applications of these results, the monotonicity and convexity of a function involving the ratio of two gamma functions and originating from the establishment of the best upper and lower bounds in Kershaw's double inequality are derived, two sharp double inequalities involving ratios of double factorials are recovered, the probability integral or error function is estimated, a double inequality for ratio of the volumes of the unit balls in $\mathbb{R}^{n-1}$ and $\mathbb{R}^n$ respectively is deduced, and a symmetrical upper and lower bounds for the gamma function in terms of the psi function is generalized.
SOME INEQUALITIES AND ABSOLUTE MONOTONICITY FOR MODIFIED BESSEL FUNCTIONS OF THE FIRST KIND
Guo, Bai-Ni,Qi, Feng Korean Mathematical Society 2016 대한수학회논문집 Vol.31 No.2
By employing a refined version of the $P{\acute{o}}lya$ type integral inequality and other techniques, the authors establish some inequalities and absolute monotonicity for modified Bessel functions of the first kind with nonnegative integer order.
TWO NEW PROOFS OF THE COMPLETE MONOTONICITY OF A FUNCTION INVOLVING THE PSI FUNCTION
Guo, Bai-Ni,Qi, Feng Korean Mathematical Society 2010 대한수학회보 Vol.47 No.1
In the present paper, we give two new proofs for the necessary and sufficient condition $\alpha\leq1$ such that the function $x^{\alpha}[lnx-\psi(x)]$ is completely monotonic on (0,$\infty$).
MONOTONICITY AND LOGARITHMIC CONVEXITY OF THREE FUNCTIONS INVOLVING EXPONENTIAL FUNCTION
Bai-Ni Guo,Ai-Qi Liu,Feng Qi 한국수학교육학회 2008 純粹 및 應用數學 Vol.15 No.4
In this note, an alternative proof and extensions are provided for the following conclusions in [6, Theorem 1 and Theorem 3]: The functions 1 x2 ¡ e¡x (1¡e¡x)2 and 1 t ¡ 1 et¡1 are decreasing in (0;1) and the function t eat¡e(a¡1)t for a 2 R and t 2 (0;1) is logarithmically concave.
Bai-Ni Guo,Feng Qi 대한수학회 2011 대한수학회지 Vol.48 No.3
A class of functions involving divided differences of the psi and tri-gamma functions and originating from Kershaw's double inequality are proved to be completely monotonic. As applications of these results, the monotonicity and convexity of a function involving the ratio of two gamma functions and originating from the establishment of the best upper and lower bounds in Kershaw's double inequality are derived, two sharp double inequalities involving ratios of double factorials are recovered, the probability integral or error function is estimated, a double inequality for ratio of the volumes of the unit balls in $\mathbb{R}^{n-1}$ and $\mathbb{R}^n$ respectively is deduced, and a symmetrical upper and lower bounds for the gamma function in terms of the psi function is generalized.
TWO NEW PROOFS OF THE COMPLETE MONOTONICITY OF A FUNCTION INVOLVING THE PSI FUNCTION
Bai-Ni Guo,Feng Qi 대한수학회 2010 대한수학회보 Vol.47 No.1
In the present paper, we give two new proofs for the necessary and sufficient condition α ≤ 1 such that the function xα[ln x − ψ(x)] is completely monotonic on (0,∞).
애니메이션 영화 <강자아(姜子牙)> 속 유심론의 철학적 연구
곽여니(Guo-Ru Ni),김세훈(Sae-Hoon Kim) 한국애니메이션학회 2021 애니메이션연구 Vol.17 No.3
신화를 소재로 한 대부분의 애니메이션 영화의 중심 사상은 ‘신성’과 ‘인성’의 대립에서 나타난다. 신화적 인물 캐릭터의 창조는 단순하지 않으며, 절대적인 선과 악은 상대적이고 모순적인 경우가 훨씬 많다. 신화 애니메이션 영화가 구현하는 더 많은 것은 ‘신’의 추상화된 유물주의 정신이다. 신화 애니메이션 영화의 세계관에서 중생은 모두 자기의 독립적인 세계를 형성하는데, 이러한 세계는 서로 영향을 끼치면서 함께 발전한다. 애니메이션 영화 <강자아> 속 모든 등장인물은 자아의 주관적 의식을 가지고 있으며, 이러한 주관적 의식이 형성된 세계를 우리는 유심론 사상이라고 부른다. 본고에서는 <강자아> 속 모든 등장인물이 처해 있는 서로 다른 입장, 서로 다른 사유의 관점 및 등장인물들 사이에 생겨난 여러 가지 주관적 의식 사이의 갈등을 통해 신화 영화 속에 반영된 유심론적 철학사상을 이해해 보고자 한다. <강자아>는 주인공 강자아의 시각을 통해 전체 스토리를 전개하고 있고, 애니메이션 영화 속 각각의 등장인물들은 모두 각자의 스토리를 가지고 있어 각자의 ‘정신 본체’를 파생시켜 나간다. 그것은 곧 자신의 객관적 세계에 의지하며 또한 이러한 ‘정신 본체’ 자신의 발전 규율에도 부합된다. The driving theme of many mythological animation films is that of the confrontation between “divinity” and “human nature”. Mythological characters in animation film do not tend to be singularly good or bad, more often time is relative and contradictory. Currently, mythical animation films embody more of the abstract materialistic spirit of “God”. In essence, all living beings can form their own independent world in which they can influence and develop each other. Each character in the animation film Jiang Ziya has a subjective consciousness of self and the world of subjective consciousness being formed, which we call idealistic thought. This paper identifies the idealistic philosophy that this myth conveys to us by analyzing the position of each character in Jiang Ziya, their different thinking angles, and the contradictions that exist between the multiple subjective consciousness produced by the characters. The animation movie “Jiang Ziya” promotes the development of the entire storyline through the perspective of the protagonist Jiang Ziya. Each character in the animation film has their own story, from which they derive their own “spiritual body”, which is attached to their own objective world and conforms to the law of development of this “spiritual body”.