Jie Liu Email: liujie@uw.edu

Education
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Research
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In Sep.2009, I will go to the University of Washington to further my study under the supervision of Prof. Anantram. My research interests include: Quantum Physics, Large-Scale Scientific Computation, Nanoelectronics, IC & Device Technology, etc.

Education

Publication

(none at present)

  1. Jie Liu, Jun Zou, Jihuan Tian, Jiansheng Yuan, ¡°Analysis of Electric Field, Ion Flow Density and Corona Loss of Same-Tower Double-Circuit HVDC Lines Using Improved FEM¡±, IEEE Transactions on Power Delivery, vol.24, issue.1, pp.482-483. <SCI source> (PDF, also available at IEEE Xplorer)
  2. Jie Liu , Duo Chen, Jihuan Tian, Yun Xu, Jiansheng Yuan, ¡°Efficient Analysis of Electromagnetic Fields near Lightning Channel by Using SIBC in FDTD¡±, The 20th International Zurich Symposium on Electromagnetic Compatibility, Zurich, Switzerland, 2009 (EMC Zurich 2009), conf. proc. pp.129-132. (PDF, also available at IEEE Xplorer)
  3. Jie Liu, Jun Zou, Jihuan Tian, Jiansheng Yuan, Xinshan Ma, ¡°An Accurate Adaptive Method to Draw 2-D Electric Lines of Force¡±, The 8th International Symposium on Antennas, Propagation and EM Theory, Kunming, China, 2008 (ISAPE 2008), conf. proc. pp.1092-1095. <EI source> (PDF)
  4. Y. Yang, J. Liu , J. B. Lee, S. H. Chang, J. Zou, ¡°Field Calculation for HVDC Transmission Lines over Irregular Terrain Using an Adaptive Boundary Element Method with Fast Matrix Filling¡±, IEEE Conference on Electromagnetic Computation, Athens, Greece, 2008 (IEEE CEFC 2008). (PDF)

Research

This research project consists of two parts: (1) to analyze the ground-level E and J caused by the emerging same-tower double-circuit HVDC lines by using iterative Finite Element Method; (2) to calculate audible noise and radio interference of the same-tower double-circuit HVDC lines by using Successive Image Method and empirical formulas.

The ordinary FDTD method is inefficient because the conductive ground need to be discretized, so the spatial grid need to be very small. Which makes the situation worse is that the temporal grid also need to be corespondingly small to ensure the calculation stability. Here, Surface Impedance Boundary condition is applied to exclude the ground from the calculation domain. So the simulation efficency could be enhanced by more than 90%.

Here, an adaptive method is proposed and implemented to improve the efficiency and precision. the procedure of the proposed method is similar to that of the Euler method. The difference is that the proposed method uses the high-order Taylor expansion formula to adaptively control the plotting length. So the proposed method could achieve higher accuracy, especially in the region where the electric potential changes rapidly.

Document

to be constructed ...

Software

to be constructed ...

(updated at: Sun, 08/02/2009 21:53 )

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