通过对等密度线的测定，查明了不同粒度铁粉的压坯密度变化，以及在不同压力下压坯密度变化的规律。
By measuring the equal density curves, the changes of compact density of iron powders with different particle size and different pressure were investigated.
方法采用光密度分析软件分别测定三叉神经痛患者以及健康人群全景片下颌体部标定区域内的光密度，按年龄、性别进行对比分析，观察两组骨密度的变化情况。
Methods The software of bone mineral density was used to detect both patients with trigeminal neuralgia and the normal subjects′ bone mineral density of the mandibular definite zone through DPT.
测定了这些复合材料的静、动态压缩性能，并通过材料压缩前后密度变化的测量，定量表征了材料的累计损伤。
The accumulation of damage in the composites is quantified through high-precision density measurements before and after compression.
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