This paper theoretically analyzes the critical force in metal hoisting boom structure of lattice type and variable section.

本文对格构式变截面吊臂金属结构的临界力计算作了理论分析。

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Reductions of lattice spacing and force constants between atoms induce modifications in the band structures of solids and thus in electronic properties and optical properties.

晶格常数和原子间力常数的改变影响了相邻电子轨道的重合程度，引发电子能级和光学性质的变化。

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The paper analyzed the principles and features of the some common models including lattice gas model, cellular automata model, social force model and magneto-mechanical model.

总结了常见的格子气模型、元胞自动机模型、社会力模型和磁力模型的原理及算法，对比分析了其仿真效果。

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