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Disasters, such as earthquake, tsunami, tornado, and malicious attack, may cause large-area, geographically correlated and/or cascading failures in telecom networks, leading to massive connection disruptions and instability of network state. In this paper, we study survivability strategies to alleviate the effect of disasters to telecom networks, e.g., Wavelength-Division-Multiplexing (WDM) optical...
The helical waveguide resonantly couples the TE21 and TE11 modes and results in a ‘TE21-like’ eigenmode, so its dispersion characteristic needs to be researched. The dispersion equation of the traveling wave mode and backward wave mode is derived for engineering applications. The model is built and the helical waveguide is simulated by using three-dimension electromagnetic emulation software HFSS.
The effects of a small misalignment of the inner rod in a corrugated coaxial-gyrotron on eigenvalue, resonant frequency, and electronic efficiency, and so forth, are presented. As a practical application, with the electronic velocity spread and cavity wall resistivity being taken into account, the beam–wave interaction of a 170 GHz megawatt corrugated coaxial-gyrotron operating with TE$_{31,12}$ ...
The finite-difference time-domain method is used for the numerical analysis of acoustic wave in piezoelectric media. The Gauss equation in piezoelectric materials and the Newton's equations of motion are discretized with centered finite differences in spatial and temporal domain by the FDTD method, and the numerical solutions of the acoustic propagation in the time domain can be obtained directly...
In recent years the number of death and injury in the traffic accident is continue increasing year by year in China, which brings a great lost for social economy. In this paper we mainly studied on the data of traffic accident and follow volume in a certain section of road. Fuzzy regression analysis using fuzzy linear models with symmetric triangular fuzzy number coefficients has been formulated earlier...
Our purpose of this study is to examine the relationship among price promotion, calculated commitment and customer loyalty. The fieldwork was conducted in the hotel industry, in Sichuan, Yunnan and Zhejiang Province of China (N = 1074). Via SEM analysis, the authors attempt to explore the inherent mechanisms on the formation of customer loyalty and reveal the deep-seated reasons for companies' dilemma...
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