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PERIODIC SOLUTIONS OF ASYMPTOTICALLY LINEA RHAMILTONIAN SYSTEMS

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Chinese Annals of Mathematics,Series B 1997年第3期18卷 359-372页

作者： Fei guihua Qiu Qingjiu Department of Mathematics Nanjing UniversityNanjing 210008China.

The authors establish the existence of nontrival periodic solntions of the asymptotically linear Hamiltonian systems in the general case that the asymptotic matrix may be degenerate and *** is done by using the critical point theory,Galerkin approximation procedure and the Maslov-type index theory introduced and generalized by Conley,Zehnder and Long.

关键词： Periodic solution Critical point Hamiltonian systems Maslov-type index

Can all the recurrence relations for spherical functions be extended to spheroidal functions

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Science China(Physics,Mechanics & Astronomy) 2011年第10期54卷 1775-1782页

作者： TIAN guihua LI ZhaoYang School of Science Beijing University of Posts and Telecommunications Beijing 100876 China

There are two kinds of recurrence relations for the spherical functions Pml. The first are those with the same m but different l. Thesecond are those with the same l but different m. The spheroidal functions are extensions of the spherical functions. Recurrencerelations of the first kind are obtained for the spheroidal functions in recent studies. Using the shape invariance method in super-symmetric quantum mechanics, we investigate the second type of recurrence relations for the spheroidal functions. The resultsshow that the second kind of recurrence relation can not be extended to the spheroidal functions.

关键词： spheroidal wave functions supersymmetry quantum mechanics super-potential shape-invariance

The multiscale simulation of metal organic chemical vapor deposition growth dynamics of GaInP thin film

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Science China(Physics,Mechanics & Astronomy) 2010年第8期53卷 1481-1490页

作者： HU guihua YU Tao Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of EducationEast China University of Science and TechnologyShanghai 200237China CIMS&Robot Center of Shanghai University Shanghai 200072China

As a Group III–V compound, GaInP is a high-efficiency luminous material. Metal organic chemical vapor deposition (MOCVD) technology is a very efficient way to uniformly grow multi-chip, multilayer and large-area thin film. By combining the computational fluid dynamics (CFD) and the kinetic Monte Carlo (KMC) methods with virtual reality (VR) technology, this paper presents a multiscale simulation of fluid dynamics, thermodynamics, and molecular dynamics to study the growth process of GaInP thin film in a vertical MOCVD reactor. The results of visualization truly and intuitively not only display the distributional properties of the gas’ thermal and flow fields in a MOCVD reactor but also display the process of GaInP thin film growth in a MOCVD reactor. The simulation thus provides us with a fundamental guideline for optimizing GaInP MOCVD growth.

关键词： metal organic chemical vapor deposition computational fluid dynamics kinetic Monte Carlo virtual reality multiscale simulation GaInP thin film growth

Enhanced NTRU cryptosystem eliminating decryption failures

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Journal of Systems Engineering and Electronics 2006年第4期17卷 890-895页

作者： Yao Jun Zeng guihua Dept. of Electronic Engineering Shanghai Jiaotong Univ. Shanghai 200030 P.R.China

An enhaned NTRU cryptosystem eliminating decryption failures is proposed without using padding schemes and can resist the oracle model andchosen-ciphertext attacks. Because lattice reduction is the main threat to lattice-based cryptosystems, lattice reductionalgorithms are analyzed to evaluate the security of this scheme. Furthermore, the new scheme remains the advantage of high efficiency of original NTRU.

关键词： NTRU cryptosystem polynomial algebra decryption failure lattice reduction.

The recurrence relations for the spheroidal functions

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Science China(Physics,Mechanics & Astronomy) 2011年第3期54卷 393-400页

作者： TIAN guihua ZHONG ShuQuan School of Science Beijing University of Posts and Telecommunications Beijing 100876 China

The integrable properties of the spheroidal equations are investigated. The shape-invariance property is proved to be retained for the spheroidal equations, for which the recurrence relations are obtained. This is the... 详细信息

关键词： spheroidal wave functions supersymmetry quantum mechanics super-potential shape-invariance

When graphite meets Li metal

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National Science Review 2020年第10期7卷 1521-1522页

作者： Yu Ding guihua Yu Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin

Wetting, indicating the ability of a liquid to spread out over solid surfaces,is of vital importance in addressing the scientific issues related to energy and environment technologies. The study of wetting encompasses the academic disciplines of surface chemistry, nanotechnology, materials science and energy *** past several decades have witnessed significant progress in achieving desirable wetting performance with water,

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On Chinese Traditional Culture from the Perspective of Cultural Exchange between China and the West

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学术界 2017年第7期 302-310页

作者： Cao guihua School of Foreign Languages Hubei Engineering University

With the strengthening of globalization and closer ties between countries,all-round exchanges and cooperation have become an inevitable *** the new era,the cultural exchange between China and the West presents an unprecedented depth and *** traditional culture,which has made great contributions to Oriental culture and even the world culture,has been developed,in the process of constant conflict,digestion,and absorption while entering other countries in the *** inclusiveness of Chinese traditional culture has made it survive and thrive in absorbing the quintessence of foreign culture,which makes it contain new *** the process of Chinese and Western cultural exchanges,some parts of the essence traditional Chinese culture which are ignored should be given certain inclination in policy and guided by strengthening the education of Chinese traditional culture.

关键词：中国传统文化文化交流西方世界文化东方文化外来文化全球化包容性

Advanced delivery strategies facilitating oral absorption of heparins

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Asian Journal of Pharmaceutical Sciences 2020年第4期15卷 449-460页

作者： guihua Fang Bo tang School of Pharmacy Nantong University19 Qixiu RoadNantong 226001China

Heparins show great anticoagulant effect with few side effects,and are administered by subcutaneous or intravenous route in *** improve patient compliance,oral administration is an alternative ***,oral administration of heparins still faces enormous challenges due to the multiple *** review briefly analyzes a series of barriers ranging from poorly physicochemical properties of heparins,to harsh biological barriers including gastrointestinal degradation and pre-systemic ***,several approaches have been developed to overcome these obstacles,such as improving stability of heparins in the gastrointestinal tract,enhancing the intestinal epithelia permeability and facilitating lymphatic delivery of ***,this review aims to provide insights concerning advanced delivery strategies facilitating oral absorption of heparins.

关键词： Heparins Oral delivery Multiple obstacles Stability Intestinal epithelia permeability Lymphatic transport

Novel detection method for infrared small targets using weighted information entropy

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Journal of Systems Engineering and Electronics 2012年第6期23卷 838-842页

作者： Xiujie Qu He Chen guihua Peng School of Information and Electronics Beijing Institute of Technology Beijing 100081 P. R. China

This paper presents a method for detecting the small infrared target under complex background. An algorithm, named local mutation weighted information entropy （LMWIE）, is proposed to suppress background. Then, the grey value of targets is enhanced by calculating the local energy. Image segmentation based on the adaptive threshold is used to solve the problems that the grey value of noise is enhanced with the grey value improvement of targets. Experimental results show that compared with the adaptive Butterworth high-pass filter method, the proposed algorithm is more effective and faster for the infrared small target detection.

关键词： infrared small target detection local mutation weight-ed information entropy (LMWIE) grey value of target adaptivethreshold.