OALib Journal期刊

ISSN: 2333-9721




2019 ( 48 )

2018 ( 430 )

2017 ( 443 )

2016 ( 497 )


匹配条件: “Xin Liu” ,找到相关结果约91933条。
Staff Psychological Contract Innovates Human Resource Management  [PDF]
Xiaoyan LIU, Xin WEI
iBusiness (IB) , 2009, DOI: 10.4236/ib.2009.11005
Abstract: This paper mainly studies on the relationships between the contents of staff psychological contract, job satisfaction level and occupation satisfaction level by surveying, combining research methods of literature, academic and empirical research. The research results have important reference value on human resource management innovation. New suggestions were also put forward, which are relative with recruitment, measure of psychological contract, culture construction and targeted incentives to staff of different attributes.
Tracing the History of Recent Bulge Star Formation in Active Galactic Nuclei
Xin Liu
Physics , 2010, DOI: 10.1111/j.1745-3933.2010.00877.x
Abstract: We examine the relation between black hole accretion and bulge star formation as a function of look-back time (tau) in 20,541 obscured AGNs (with redshifts ~ 0.1 and bolometric luminosities L_Bol ~ 10^43--10^45 erg s^-1) optically selected from the Sloan Digital Sky Survey (SDSS). To quantify the most recently formed stars with ages less than typical AGN lifetimes, we estimate the differentiated specific star formation rate (SSFR_tau) based on population synthesis analysis. Eddington ratio (lambda) is inferred using [O III]5007 luminosity and stellar velocity dispersion as proxies for L_Bol and black hole mass respectively. We find that when tau < tau_0, SDSS AGNs follow a power law: lambda \propto (SSFR_tau)^1.0-1.1; the relation flattens out when tau > tau_0. The threshold timescale tau_0 is ~ 0.1 (~ 1) Gyr in young (old) bulges. The scatter in the power laws is dominated by observational uncertainties. These results may provide useful constraints on models explaining the correlations between AGN activity and bulge star formation.
New method for computation of fluid helicity: Knot polynomial invariants
Xin Liu
Physics , 2010,
Abstract: A new algebraic method for computing helicity is developed, by discovering a relationship between helicity of fluid mechanics and algebraic polynomial invariants of knot theory. We have constructed a topological invariant $t^{H\left(\mathcal{L}\right)}$ for a link $\mathcal{L}$ of knots, where $H$ is the helicity of a given fluid and $t$ a formal constant. For oriented knotted vortex lines, $t^{H}$ satisfies the skein relations of the Kauffman R-polynomial; for un-oriented knotted lines, $t^{H}$ satisfies the skein relations of the Kauffman bracket polynomial. Our new algebraic method is to use skein relations to compute the helicity of a link $\mathcal{L}$ by algebraic recursion.
Knots in $SU\left(M|N\right) $ Chern-Simons Field Theory
Xin Liu
Physics , 2010, DOI: 10.1088/1751-8113/43/25/255202
Abstract: Knots in the Chern-Simons field theory with Lie super gauge group $SU\left(M|N\right) $ are studied, and the $% S_{L}\left(\alpha,\beta,z\right) $ polynomial invariant with skein relations are obtained under the fundamental representation of $\mathfrak{su}\left(M|N\right) $.
Conjecture on imminent earthquake prediction --- from shaving foam to cloud patterns
Xin Liu
Physics , 2012,
Abstract: A conjecture on imminent earthquake prediction is presented. Drastic geological deformations of crustal rock strata taking place immediately (hours/days) before an earthquake may cause fast air or gas emission/absorption vertically in between ground and sky. I conjecture, inspired by an observation of strange patterns appearing on shaving foam, that this fast movement of air fluid may produce unusual cloud patterns at interfaces between atmosphere levels. This air movement is vertical and drastic, different from the horizontal and moderate meteorological air movement, hence its caused cloud patterns are expected to be different from meteorological cloud patterns. This provides a possible origin for the so-called earthquake cloud. Recognition of different earthquake cloud patterns may provide a practical way to estimate location, magnitude and strength of geological deformations of rock strata, and hence a method with support of physics for imminent earthquake prediction. In the end of this paper an experiment has been designed to test the conjecture.
Knot polynomial invariants in classical Abelian Chern-Simons field theory
Xin Liu
Mathematics , 2010, DOI: 10.1016/j.aop.2010.06.002
Abstract: Kauffman knot polynomial invariants are discovered in classical abelian Chern-Simons field theory. A topological invariant $t^{I\left( \mathcal{L} \right) }$ is constructed for a link $\mathcal{L}$, where $I$ is the abelian Chern-Simons action and $t$ a formal constant. For oriented knotted vortex lines, $t^{I}$ satisfies the skein relations of the Kauffman R-polynomial; for un-oriented knotted lines, $t^{I}$ satisfies the skein relations of the Kauffman bracket polynomial. As an example the bracket polynomials of trefoil knots are computed, and the Jones polynomial is constructed from the bracket polynomial.
A remote response of ATP hydrolysis
Xin Liu
Quantitative Biology , 2013,
Abstract: ATP-hydrolysis is the basic energy source of many physiological processes, but there is a lack of knowledge regarding its biological role other than energy transfer and thermogenesis. Not all the energy released by ATP-hydrolysis could be used in powering target biological processes and functions. Partial energy dissipates into water. By validating the impact of this dissipated energy, we found that energy released by ATP hydrolysis could induce notable regulation of biomolecule's properties 100 nanometers away. Namely ATP hydrolyzation is recycled in remote biochemical property modulation.
Adaptive Resonance Theory Based Two-Stage Chinese Name Disambiguation  [PDF]
Xin Wang, Yuanchao Liu, Xiaolong Wang, Ming Liu, Bingquan Liu
International Journal of Intelligence Science (IJIS) , 2012, DOI: 10.4236/ijis.2012.24011
Abstract: It’s common that different individuals share the same name, which makes it time-consuming to search information of a particular individual on the web. Name disambiguation study is necessary to help users find the person of interest more readily. In this paper, we propose an Adaptive Resonance Theory (ART) based two-stage strategy for this problem. We get a first-stage clustering result with ART1 model and then merge similar clusters in the second stage. Our strategy is a mimic process of manual disambiguation and need not to predict the number of clusters, which makes it competent for the disambiguation task. Experimental results show that, in comparison with the agglomerative clustering method, our strategy improves the performance by respectively 0.92% and 5.00% on two kinds of name recognition results.
A Wideband Circularly Polarized Patch Antenna for 60 GHz Wireless Communications  [PDF]
Rongguo Zhou, Duixian Liu, Hao Xin
Wireless Engineering and Technology (WET) , 2012, DOI: 10.4236/wet.2012.33016
Abstract: This paper presents the design of a fully packaged 60 GHz wideband patch antenna incorporating an air cavity and a fused silica superstrate. Circular polarization (CP) is realized by introducing a diagonal slot at the center of the square patch. By optimizing the patch and the slot dimensions, a high efficiency (>90%) microstrip fed CP antenna with an impedance bandwidth of 24% and a 6 dB axial ratio bandwidth of 21.5% is designed. A coplanar waveguide (CPW) to microstrip transition with λ/4-open-ended stubs are then designed to match the antenna to the CPW packaging interface. The experimental results of the final packaged antenna agree reasonably with the simulation results, demonstrating an impedance bandwidth of more than 26% and a 6 dB axial ratio bandwidth of 22.7%.
Design and Realization of Signal Processing Platform of Multi-Parameter Wearable Medical Devices  [PDF]
Xin Tan, Binfeng Xu, Qiancheng Liu
Journal of Signal and Information Processing (JSIP) , 2013, DOI: 10.4236/jsip.2013.42012

This paper presents a design of new type of multi-parameter wearable medical devices signal processing platform. The signal processing algorithm has a QRS-wave detection algorithm based on LADT, wavelet transformation and threshold detection with TMS320VC5509 DSP system. The DSP can greatly increase the speed of QRS-wave detection, and the results can be practical used for multi-parameter wearable device detection of abnormal ECG.


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