基于对梁元带板问题的讨论及对大量梁元的实际计算结果分析，推导出梁元惯性矩计算的经验公式。
Based on discussion of attached plate and analysis of beam elements calculation results, a experience formula is deduced for the calculation of a beam elements inertial moment.
Q3D提取使用的矩量法(积分方程)和有限元计算的电导，电容，电感和电阻矩阵。
Q3D Extractor USES method of moments (integral equations) and FEMs to compute capacitive, conductance, inductance and resistance matrices.
同时采取了二元调宽脉冲加矩方式的再平衡回路。
A binary width-modulated pulse rebalance loop is applied in the accelerometer.
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