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Search Results: 1 - 10 of 62719 matches for " Fan Wei "
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Research on Technology Development of Human Resource Management Information System
Wei FAN
Management Science and Engineering , 2009,
Abstract: : With the development of internet technology and enterprise management of information technology in depth, the future of human resources in information technology will be showed the following characteristics:(1)software development will become a platform and model;(2)full participatory approach will tend to diversify based on the Internet and new 3G technology; (3)integrated applications based on SOA framework; (4)group collaboration based on workflow technology;(5)business intelligence based on human resources strategy will be applied deeply in enterprise. Key words: Internet Technology; Human Resources Management; eHR
A Non-equilibrium STM model for Kondo Resonance on surface
Wei Fan
Physics , 2005, DOI: 10.1103/PhysRevB.73.045429
Abstract: Based on a no-equilibrium STM model, we study Kondo resonance on a surface by self-consistent calculations. The shapes of tunneling spectra are dependent on the energy range of tunneling electrons. Our results show that both energy-cutoff and energy-window of tunneling electrons have significant influence on the shapes of tunneling spectra. If no energy-cutoff is used, the Kondo resonances in tunneling spectrum are peaks with the same shapes in the density of state of absorbed magnetic atoms. This is just the prediction of Tersoff theory. If we use an energy cutoff to remove high-energy lectrons, a dip structure will modulate the Kondo resonance peak in the tunneling spectrum. The real shape of Kondo peak is the mixing of the peak and dip, the so-called Fano line shape. The method of self-consistent non-equilibrium matrix Green function is discussed in details.
Classification of superconductors on Tc Map
Wei Fan
Physics , 2009,
Abstract: The Tc map in parameter space of electron-phonon interaction $\lambda$ and phonon frequency $\Omega$ is used to classify already known superconductors. The Tc map is partitioned into six regions based on superconductors parameters $\lambda$ and $\Omega$, We briefly discuss the properites of superconductors in evey regionm The Tc map can be used as a useful tool to find and design new superconductors with higher Tc and better properties for their real applications.
Anti-correlation between energy-gap and phonon energy for cuprate Bi2212 superconductor
Wei Fan
Physics , 2007,
Abstract: Using electron-phonon mechanism, we explains very well the spatial anti-orrelation between the energy-gap and the energy of phonon mode for cuprate superconductor found in d^2I/dV^2 spectrum by STM measurements [Jinho Lee, et.al Nature {\bf 442},546 (2006)], which is the direct effect of a relation $M<\omega^{2}>\lambda=const$. We calculate T$_{C}$ maps on $\lambda-\Omega_{P}$ plane which help us understanding the relation M<\omega^{2}>\lambda=const$ and the superconductivity of superconductors.
Pseudo-gap and vertex correction of electron-phonon interaction
Wei Fan
Physics , 2010,
Abstract: The strong-coupling Eliashberg theory plus vertex correction is used to calculate the maps of transition temperature (Tc) in parameter-space characterizing superconductivity. Based on these Tc maps, complex crossover behaviors are found when electron-phonon interaction increases from weak-coupling region to strong-coupling region. The doping-dependent Tc of cuprate superconductors and most importantly the pseudo-gap can be explained as the effects of vertex correction.
Predictions of highest Transition-temperature for electron-phonon superconductors
Wei Fan
Physics , 2009, DOI: 10.1016/j.physc.2009.01.009
Abstract: Using the Eliashberg strong coupling theory with vertex correction, we calculate maps of transition temperatures (T$_{c}$) of electron-phonon superconductors in full parameter space. The maximums of transition temperatures for superconductors are predicted based on the maps and the criterion of instability of superconductivity. The strong vertex correction and high transition temperature are tightly correlated in superconductors. We predict that the maximum of T$_{c}$ of new iron-based superconductors will be close to 90(K).
The Weak Bruhat Order and Separable Permutations
Fan Wei
Mathematics , 2010,
Abstract: In this paper we consider the rank generating function of a separable permutation $\pi$ in the weak Bruhat order on the two intervals $[\text{id}, \pi]$ and $[\pi, w_0]$, where $w_0 = n,(n-1),..., 1$. We show a surprising result that the product of these two generating functions is the generating function for the symmetric group with the weak order. We then obtain explicit formulas for the rank generating functions on $[\text{id}, \pi]$ and $[\pi, w_0]$, which leads to the rank-symmetry and unimodality of the two graded posets.
A Research on Emergency DC Power Support Based on DCOI  [PDF]
Fan Fan, Yingmin Zhang, Xingyuan Li, Wei Ma
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B166
Abstract:

An integrated scheme of emergency DC power support which is based on dominant center of Inertia DCOI is proposed to improve power system transient stability. The inter-area speed differences equivalent by dominant center of inertia alleviates the main weakness of the traditional signal which is made of the frequencies at both sides and is represent of abnormal information of the nonlinear dynamic behavior of the power system based on a model in which two AC systems are connected by a HVDC Link. Sichuan Power Grid connected with Southwest Power Grid by Deyang-Baoji HVDC project is used to testify the method. The simulation results show that the control strategy can significantly advance the transient stability of AC/DC system through extended equal area criterion (EEAC).

Harmonious Tourism Environment and Tourists Perception: An Empirical Study of Mountain-Type World Cultural Heritage Sites in China  [PDF]
Zhiyong Fan, Sheng Zhong, Wei Zhang
Journal of Service Science and Management (JSSM) , 2012, DOI: 10.4236/jssm.2012.51012
Abstract: This study tested the structural equation model between harmonious tourism environment perception and tourists’ loy- alty. In this paper, a model is erected to indicate the relationship between harmonious tourism environment perception and tourists’ loyalty. With 377 valid questionnaires from 8 mountain-type world cultural heritage sites in China, the author tested the model by SPSS and AMOS. It was found that the perception of natural ecosystem was the most influential factor affecting tourists’ entire environment perception, social relations system was the second place and cultural ecosystem was the third place. The entire harmonious tourism environment perception also greatly determines tourists’ loyalty. At last, some suggestions were given to make tourism destination develop sustainably based on this study.
New Algorithm for Local Shape Preservation T-Spline Surface Skinning  [PDF]
Wei Wang, Qinhe Fan, Gang Zhao
Journal of Computer and Communications (JCC) , 2018, DOI: 10.4236/jcc.2018.612008
Abstract:
Surface skinning is a widely used algorithm in CAD modeling which permits designer to pass surface through several section curves, thus providing modeling process with powerful ability to describe complex shapes and transform the 2D design intention into 3D space. This paper contributes in the combination of T-Spline technology and surface skinning modeling by introducing a new algorithm for local shape preservation T-Spline surface skinning. The examples given in the paper show that this algorithm is effective.
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