For decreasing the computational scale, adjoint variable method is proposed to solve the sensitivity analysis based on FEM.
结合数字信号处理技术以及数值分析方法，解决了结构优化求解规模巨大的难点。
A new kind of variable scale projection is obtained. This method opens up new function and application range for common map projections. Systematical results and applications have been obtained.
该研究开拓了常用地图投影的功能和应用范围，获得了系统的理论结果和应用实例。
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