By using the so called mass condensation technique, the number of the degrees of freedom in dynamic analysis is reduced greatly.
用质量凝聚技巧，使动力分析的自由度数目大为减少。
In addition, the calculation results between the lumped mass method and the method of the condensation of degree of freedom have been compared.
此外，本文还对堆聚质量法和自由度凝聚法计算的结果进行了比较。
The volatile organic compounds (VOCs) produced in the laser-sculpture process of bicolor board were studied using cold trap condensation-gas chromatography-mass spectrometry.
研究了冷阱浓缩气相色谱-质谱法检测双色板在激光工艺雕刻过程产生的挥发性有机污染物的组成。
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