Wang J.,Jiangxi University of Science and Technology
Civil Engineering and Urban Planning IV - Proceedings of the 4th International Conference on Civil Engineering and Urban Planning, CEUP 2015 | Year: 2016
This article discusses the relationship between urban skyline and fractal dimension. At first, it briefly reviewed the recent researches of urban skyline and introduced the basic knowledge of fractal geometry. Then, it selected a typical waterfront urban skyline photo each of Boston, Sydney, and Chicago and extracted their urban skylines. The fractal dimension (box-counting dimension) of each urban skyline was calculated by the software Fractal fox based on the fractal geometry theory. The calculated results were compared and analyzed at the end and they show that the value of the skyline’s box-counting dimension is positively related to the understanding of the complexity of skyline in vision. It further concludes that fractal dimension could be an effective tool for quantitative analysis of urban skyline. © 2016 Taylor & Francis Group, London.
Xie L.,Jiangxi University of Science and Technology
Agro Food Industry Hi-Tech | Year: 2017
The fantastic work of famous British writer Julian Barnes, "England, England", is often regarded as a critique of postmodern consumer society. However, the theme of the novel, that is, "England, England" project on the Isle of Wight is not windy "immersive" object; its own construction process is the history of the establishment of Isle of Wight nation-state. In view of this, in order to enrich the relevant research results, the paper studies the metaphor theme in "England, England" and analyzes the establishment pattern of modern nation-state contained in the work.
Xu Y.,Jiangxi University of Science and Technology
Guangzi Xuebao/Acta Photonica Sinica | Year: 2017
By using the dispersion pulse propagation theory and the refractive index of air Ciddor equation, the cross-correlation function of the femtosecond pulse laser was derived. According to the theory that the resulting expression of the cross-correlation function depends on the spectral distribution of the laser source, the numerical model of the cross-correlation patterns among pulses of the femtosecond pulse sequence propagating in air with different spectral distribution under different optical path difference and the change of environmental parameters was created. Results show that, the cross-correlation pattern has a stable chirp and linear broadening with the increase of propagation distance, but the change of the environmental parameters give rise to the shift of the correlations patterns without any extra linear broadening or chirp. © 2017, Science Press. All right reserved.
Liu C.-F.,Jiangxi University of Science and Technology |
Liu C.-F.,CAS Institute of Physics |
Liu W.M.,CAS Institute of Physics
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2012
We investigate the half-skyrmion excitations induced by spin-orbit coupling in the rotating and rapidly quenched spin-1 Bose-Einstein condensates. We give three expressions of the corresponding spin vectors to describe the half-skyrmion. Our results show that the half-skyrmion excitation depends on the combination of spin-orbit coupling and rotation, and it originates from a dipole structure of spin which is always embedded in three vortices constructed by each condensate component respectively. When both the strength of spin-orbit coupling and the rotation frequency are larger than some critical values, the half-skyrmions encircle the center with one or several circles to form a radial lattice, which occurs even in the strong ferromagnetic/antiferromagnetic condensates. We can use both the spin-orbit coupling and the rotation to adjust the radial lattice. The realization and the detection of the half-skyrmions are compatible with current experimental technology. © 2012 American Physical Society.
Xiao X.,Gannan Normal University |
Li Y.-L.,Jiangxi University of Science and Technology
European Physical Journal D | Year: 2013
Entangled states in high dimensional systems are of great interest due to the extended possibilities they provide in quantum information processing. Recently, Sun et al. [Phys. Rev. A 82, 052323 (2010)] and Kim et al. [Nat. Phys. 8, 117 (2012)] pointed out that weak measurement and quantum weak measurement reversal can actively combat decoherence. We generalize their studies from qubits to qutrits under amplitude damping decoherence. We find that the qutrit-qutrit entanglement can be partially retrieved for certain initial states when only weak measurement reversals are performed. However, we can completely defeat amplitude damping decoherence for any initial states by the combination of prior weak measurements and post optimal weak measurement reversals. The experimental feasibility of our schemes is also discussed. © EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2013.
Yu C.,Jiangxi University of Science and Technology |
Yu C.,Carnegie Mellon University |
Li G.,Carnegie Mellon University |
Kumar S.,Carnegie Mellon University |
And 2 more authors.
Advanced Materials | Year: 2014
Coreshell-like Ag2O/Ag2CO3 nanoheterostructures with tailored interface are fabricated by a facile, low-cost and one-step phase transformation method. The unique bandgap structure of the Ag2O/Ag2CO3 exhibits high separation efficiency of photogenerated electrons and holes, which effectively protects the Ag2CO3 semiconductor to avoid its photoreduction and gives rise to high activity and stability in degradation of the typical water pollutants. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Cheng J.,Jiangxi University of Science and Technology
Advanced Materials Research | Year: 2012
In the premise of achieving corresponding functions, sustainable design means to take the most natural, harmless and energy-saving materials to realize the product functions to meet the need of the present without compromising the ability of future generation to meet their own needs. While with the Chinese characteristic features and the endless expansion demand on consumption, design is going on the opposite direction. The product design research based on sustainable concept is a re-examined view of human-oriented design in front of the challenge of limited resources protection. And with the help of unlimited creativities and design, we can care more about our nature and society on one hand. On the other hand, the silent affection and promotion on green, energy-saving and low-carbon living concept will also definitely influence our human being to be more rational. © (2012) Trans Tech Publications.
Liu Z.,Jiangxi University of Science and Technology
International Journal of Theoretical Physics | Year: 2013
We investigate the entanglement property of a four-qubit state superposed by a four-qubit GHZ state and a symmetric state with spin squeezing. Numerically and analytic solutions for spin squeezing parameters are given. The squeezed parameters depend on the superpose coefficients and the relative phases. It is shown that there is no spin squeezing at n1 direction and it occurs at n2 direction under some conditions. © 2012 Springer Science+Business Media New York.
Hu J.,Jiangxi University of Science and Technology
International Journal of Advancements in Computing Technology | Year: 2012
A discrete variable structure control methodology is presented to suppress vibration of high-speed flexible parallel robot. The elastic dynamic model of the flexible robot is built by using the finite element method and experimental modal testing. Considering uncertain external disturbances and measurement noise, and uncertain parameters of the system, we can utilize invariance of the sliding mode of variable structure control in order to eliminate these adverse influences. The discrete variable structure control strategy is employed to construct the vibration robust controller which enables the flexible robot to be zero state so that the system states are away from the equilibrium one due to external disturbances and uncertain parameters. The discrete Kalman filter is constructed to as state estimator because the state variables cannot be directly measured. The first four natural frequencies and damping ratio are obtained by using experimental modal testing, and the correctness of theoretical model is verified. The experimental vibration control system is constructed and experimental validation of the controller is carried out using dSPACE real-time control system and MATLAB/Simulink tool. The experimental results showed that the proposed controller can effectively alleviate the vibration response of the high-speed flexible robot.
Hu J.,Jiangxi University of Science and Technology
Proceedings - 2012 International Conference on Intelligent Systems Design and Engineering Applications, ISDEA 2012 | Year: 2012
For a novel 2-DoF flexible parallel manipulator, its kinematic and vibration control was investigated based on the inverse dynamic model by using sliding mode control. Taking into account the complexity of rigid-flexible coupling effect of the flexible manipulator, the assumed mode method and Lagrange multiplier method were applied to derive the dynamic equations of the system. It is a differential algebraic equation. In order to design conveniently the controller based on the model, the coordinate-partitioned method was used to convert the differential algebraic equations into a second-order differential one. According to the demand of motion and vibration control, the sliding mode control method was applied to design the controller in order to obtain the desired trajectory and attenuate the elastic deformation of flexible manipulator. The numerical simulation results showed the proposed controller can eliminate the deflections of the midpoint of the flexible part and have a good trajectory track performance. © 2012 IEEE.