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Search Results: 1 - 10 of 69573 matches for " Yan-Hui Jia "
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Isomers of the Cu5 cluster: a density function theory study

Gong Heng-Feng,Li Gong-Ping,Jia Yan-Hui,

中国物理 B , 2011,
Abstract: In this work, a systematic study of some possible isomer structures of the Cu5 cluster obtained from density functional theory methods is presented. The polarisation and pseudopotential basis sets are employed in the calculations. The results show that the binding energies, frequencies, coordination numbers and average bond lengths are in reasonable agreement with reported experimental data. Moreover, four isomers of the Cu5 cluster are obtained according to calculations, in which the most stable configuration is the planar structure. Meanwhile, two three-dimensional structures of the Cu5 cluster are obtained in this work, which might be valuable for further theoretical and experimental studies. In addition, our study proves the possibility of the isomer structures of the Cu5 cluster.
Atomic diffusion in annealed Cu/SiO2/Si (100) system prepared bymagnetron sputtering

Cao Bo,Jia Yan-Hui,Li Gong-Ping,Chen Xi-Meng,

中国物理 B , 2010,
A Simplified Flexible Multibody Dynamics for a Main Landing Gear with Flexible Leaf Spring
Zhi-Peng Xue,Ming Li,Yan-Hui Li,Hong-Guang Jia
Shock and Vibration , 2014, DOI: 10.1155/2014/595964
Abstract: The dynamics of multibody systems with deformable components has been a subject of interest in many different fields such as machine design and aerospace. Traditional rigid-flexible systems often take a lot of computer resources to get accurate results. Accuracy and efficiency of computation have been the focus of this research in satisfying the coupling of rigid body and flex body. The method is based on modal analysis and linear theory of elastodynamics: reduced modal datum was used to describe the elastic deformation which was a linear approximate of the flexible part. Then rigid-flexible multibody system was built and the highly nonlinearity of the mass matrix caused by the limited rotation of the deformation part was approximated using the linear theory of elastodynamics. The above methods were used to establish the drop system of the leaf spring type landing gear of a small UAV. Comparisons of the drop test and simulation were applied. Results show that the errors caused by the linear approximation are acceptable, and the simulation process is fast and stable. 1. Introduction Automatic takeoff, landing, and taxiing are very important parts of completely autonomous flight of UAV, and taxiing tests on UAVs are obviously expensive and risky as it is easy to bring about accidents under high-speed taxiing. Simulation on the other hand is particularly important before the prototype taxiing experiment. During the development of control systems, real-time simulations such as man-in-the-loop (MIL) and hardware-in-the-loop (HIL) are also used to take place between design level simulations and costly experiments with the real plant [1–3]. Obviously accurate and efficient computer simulations of UAV on-ground models play an important role in the control system design, performance evaluations, and dynamics analysis of such vehicle systems. Meanwhile research on ground dynamics in the past decades has achieved significant results, and the design of these dynamics traditionally relies on mathematical model. Ro [4] has studied aircraft-runway dynamics in detail. In general mathematical equations of ground dynamics are complex, highly coupled, and nonlinear; their derivation and numerical implementation demand considerable time and computer cost. In recent years, the accuracy and computational efficiency of flexible multibody has been the focus of research [5, 6]. The simplified flexible multibody method enables the dynamic response to simulate effectively, even be used in many real-time simulations [7–9]. Nonretractable type landing gear has been widely used in
Internal opening incision with harmonic scalpel, remaining and tunnel thread-dragging methods in surgical management of posterior horseshoe fistula
Yan-hui SUN
Zhong Xi Yi Jie He Xue Bao , 2007,
Clinical observation of incision and drainage with ultracision-harmonic scalpel and thread-drawing in children with anal fistula: a report of 21 cases
Yan-hui SUN
Zhong Xi Yi Jie He Xue Bao , 2008,
Foreignization in the translation of traditional Chinese medicine terminologies and its cognitive theoretical basis
Yan-hui Shen
Zhong Xi Yi Jie He Xue Bao , 2011,
Diffusion and Interface Reaction of Cu/Si (100) Films Prepared by Cluster Beam Deposition

GAO Xing-Xin,JIA Yan-Hui,LI Gong-Ping,CHO Seong-Jin,KIM Hee,

中国物理快报 , 2011,
Quantum logic networks for cloning a quantum state near a given state

Zhou Yan-Hui,

中国物理 B , 2011,
Abstract: Two quantum logic networks are proposed to simulate a cloning machine that copies the states near a given one. Probabilistic cloning based on the first network is realized and the cloning probability of success based on the second network is 100%. Therefore, the second network is more motivative than the first one.
The chaotic property in the autoionization of Rydberg lithium atom

Zhou Hui,Li Hong-Yun,Gao Song,Zhang Yan-Hui,Jia Zheng-Mao,Lin Sheng-Lu,

中国物理 B , 2008,
Abstract: This paper presents theoretical computations of the ionization rate of Rydberg lithium atom above the classical ionization threshold using semiclassical approximation. The yielded random pulse trains of the escape electrons are recorded as a function of emission time such that allow for relating themselves to the terms of the recurrence periods of the photoabsorption. This fact turns to illustrate that it is ionic core scattering processes which give rise to chaos in autoionization dynamics and are verified by comparison of our results with the hydrogen atom situation readily. In order to reveal the chaotic properties in detail, the sensitive dependence of the ionization rate upon the scaled energy is discussed for different scaled energies. This approach provides a simple explanation for the chaotic character in autoionization decay of Rydberg alkali-metal atoms.
Asteroseismology of DAV white dwarf stars and G29-38
Yan-Hui Chen,Yan Li
Physics , 2013, DOI: 10.1088/1674-4527/13/12/004
Abstract: Asteroseismology is a powerful tool to detect the inner structure of stars. It is also widely used to study white dwarfs. In this paper, we discuss the asteroseismology work of DAV stars. The detailed period to period fitting method is fully discussed, including the reliability to detect the inner structure of DAV stars. If we assume that all observed modes of some DAV star are the $l$ = 1 ones, the errors of model fitting will be always great. If we assume that the observed modes are composed of $l$ = 1 and 2 modes, the errors of model fitting will be small. However, there will be modes identified as $l$ = 2 without quintuplets observed. G29-38 has been observed spectroscopically and photometrically for many years. Thompson et al. (2008) made $l$ identifications for the star through limb darkening effect. With eleven known $l$ modes, we also do the asteroseismology work for G29-38, which reduces the blind $l$ fittings and is a fair choice. Unfortunately, our two best-fitting models are not in line with the previous atmospheric results. Based on factors of only a few modes observed, stability and identification of eigenmodes, identification of spherical degrees, construction of physical and realistic models and so on, detecting the inner structure of DAV stars by asteroseismology needs further development.
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