结果表明圆柱壳部分覆盖阻尼层后，由于声漏效应，壳体声辐射与光壳相比会增强。
Numerical results showed that if the shell was partially covered wi th a damping layer, its sound radiation would be greater than that of the ba re shell due to leak effect.
结果表明，20份云南光壳稻包括13个变种69个变型，以偏粳型品种占较高比例，籼粳分类品种中偏粳型品种的广亲和性较好。
The results indicated that 20 Yunnan nuda rices have 13 varieties and 69 forms, japonicaclinous rice have higher proportion in tested cultivars, and have good wide compatibility.
目的探索随机扩增多态性DNA（RAPD）技术对大陆光亮钉螺遗传多态性研究的可行性，以获得不同地区光壳钉螺基因组DNA水平上的差异信息。
Objective Using RAPD technique to study genetic diversity of smooth-shelled Oncomelania hu- pensis in China and to gain more information on genome DNA level.
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