The necessity and significance of the analogue rule for ship structure collisions have been discussed based on the characteristic of this topic.

针对船舶耐撞特性研究问题的特点，提出进行结构碰撞相似律研究的必要性和重要性。

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A dialog management model based on the topic forest structure is presented here, which can well handle those issues with mixed initiative dialog control.

该文提出基于主题森林结构的对话管理模型，较好地处理了上述问题，能实现对话过程的混合主导。

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Protein structure classification is based on several levels. In recent years, the topic is to find methods to classify and analyze automatically protein structure.

蛋白质结构分类分为多个层次，如何对蛋白质结构进行定量分类和自动分析是目前研究的重点。

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