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    Ant Tribe

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    Ant Tribe describes the post-80s generation university graduates who live together in poor conditions without Social security in communities around China\u27s major metropolises. They dream of a better life in big cities but struggle with low-paying jobs. These struggling elites have become the fourth weak Social group, after peasants, migrant workers and unemployed people. The reason why these college graduates are compared to ants is that they are like ants: clever, hardworking, politically weak and living in groups. The real world is always different from the ideal world of the Ant Tribe in China. They often lose their purposes in a complex society. It is more important for them to recognize the distance between the real and imaginary in order to rethink whether it is a right choice to stay in a big city and try to realize their dreams. The intention of the Ant Tribe installation is to explore the process and concept of changing between the real and fantasy. In the installation, I hope to portray the Ant Tribe phenomenon widely and deeply from an artist\u27s perspective. The most important thing for me is using my artistic practice to investigate the power of the media over the contemporary subject in order to activate the viewers to question some Social issues regarding humanity consciousness. My artwork should be thought - provoking for them. I would like to use my visual language to convey specific Social issues to inquire how far the viewers are from their dreams. I hope they think about themselves in their complex society physically and psychologically when they go through my work

    Finite-Difference Time-Domain Study of Guided Modes in Nano-plasmonic Waveguides

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    A conformal dispersive finite-difference time-domain (FDTD) method is developed for the study of one-dimensional (1-D) plasmonic waveguides formed by an array of periodic infinite-long silver cylinders at optical frequencies. The curved surfaces of circular and elliptical inclusions are modelled in orthogonal FDTD grid using effective permittivities (EPs) and the material frequency dispersion is taken into account using an auxiliary differential equation (ADE) method. The proposed FDTD method does not introduce numerical instability but it requires a fourth-order discretisation procedure. To the authors' knowledge, it is the first time that the modelling of curved structures using a conformal scheme is combined with the dispersive FDTD method. The dispersion diagrams obtained using EPs and staircase approximations are compared with those from the frequency domain embedding method. It is shown that the dispersion diagram can be modified by adding additional elements or changing geometry of inclusions. Numerical simulations of plasmonic waveguides formed by seven elements show that row(s) of silver nanoscale cylinders can guide the propagation of light due to the coupling of surface plasmons.Comment: 6 pages, 10 figures, accepted for publication, IEEE Trans. Antennas Propaga

    Stability Analysis of Integral Delay Systems with Multiple Delays

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    This note is concerned with stability analysis of integral delay systems with multiple delays. To study this problem, the well-known Jensen inequality is generalized to the case of multiple terms by introducing an individual slack weighting matrix for each term, which can be optimized to reduce the conservatism. With the help of the multiple Jensen inequalities and by developing a novel linearizing technique, two novel Lyapunov functional based approaches are established to obtain sufficient stability conditions expressed by linear matrix inequalities (LMIs). It is shown that these new conditions are always less conservative than the existing ones. Moreover, by the positive operator theory, a single LMI based condition and a spectral radius based condition are obtained based on an existing sufficient stability condition expressed by coupled LMIs. A numerical example illustrates the effectiveness of the proposed approaches.Comment: 14 page