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Based on the comparative analysis of style, stigma size, pod length and width, pod surface area, seed diameter and dry weight between amphidiploids and their putative diploid ancestors, we observed that some accessions of amphidiploids revealed intermedia
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摘要通过比较分析薹属多倍体复合种与其祖先二倍体基本种在花柱、柱头大小、角果长度、宽度、种子直径及种子干重变化上的异同，发现多倍体复合种在这些发育性状上表现出处于两个祖先二倍体亲本之间，或只偏向于其中一个祖先亲本。 |
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Based on the comparative study of Yingen-Ejinaqi Basin and Erlian Basin from the aspects of Mesozoic strata, regional structures, magmatic activity, source rocks, reservoir, oil and gas reservoir formation characteristics, oil and gas distribution, and de
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摘要通过对银根－额济纳旗盆地与二连盆地的中生代地层、区域地质构造、岩浆活动、烃源岩、储层、油气成藏特征、油气分布规律及深部地壳构造等的研究，表明两盆地的区域地质及石油地质特征具有相似性。 |
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Based on the comparison and analysis of the difference of water resources between Israel and the semiarid region in China, it was concluded that the water-saving agriculture should be adopted in China.
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对比分析了中国半干旱地区与以色列的水资源条件，得出中国必须走节水农业之路。 |
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Based on the comparison and analysis of the existing metro Automatic Train Operation (ATO) systems in Chinese cities like Beijing, Shanghai and Guangzhou, the author holds that the design of ATO system shall follow a new trend towards home-manufacture of
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摘要对我国现有的北京、上海、广州的地铁列车自动运行系统进行分析、比较，并指出了国产化列车自动运行系统的设计思路。 |
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Based on the comparison and analysis of the secondary electron emission coefficient of two kinds of emitter GaAs in theory, it is concluded that when primary electron energy is lower the deviation of secondary electron emission coefficient of two kinds of
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通过对两种负电子亲和势二次电子发射材料的二次电子发射系数的理论值进行比较和分析，得出：当原电子入射能量较低时，两种材料的二次电子发射系数差值较小；当原电子入射能量较高时，两种材料的二次电子发射系数差值较大，而且随着原电子入射能量的升高，两种材料的二次电子发射系数差值也在增大。 |
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Based on the comparison between theoretical calculation and test results, this paper suggests that the filling coefficient of coronary rivet should be at 0.474.
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通过理论计算与试验结果的对比，建议冠状铆钉干涉配合的填充系数可取为0.474。 |
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Based on the comparison made among the characteristics of different kinds of the blade materials, the relationship between the material characters and the flow attack angle is explained, and then the breakage mechanism of the combined effects from both th
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通过对不同材料的特性比较，解释了材料特性与冲角之间的关系，综合阐述了泄漏流动所引起叶片正面头部空蚀与磨损联合作用产生破坏的机理。 |
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Based on the comparison of the differences and characteristics of dry-type and wet-type spraying-baking booths, it was suggested that the key to develop novel wet spraying-baking booth was to properly control the humidity.
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从理论分析、结构设计和喷烤漆房操作3个方面介绍了保证湿式喷烤漆房烘烤时湿度不超标的措施。 |
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Based on the comparison of the grain size characteristics of the Holocene peat sediment in eastern Tibetan Plateau with that of typical eolian sediments, fluvial sediments, and lacustrine sediments, the authors find that the grain size characteristics of
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摘要通过将红原泥炭地泥炭灰分的粒度特征与典型风成沉积物、湖泊沉积物、河流沉积物的粒度特征进行比较，发现泥炭灰分的粒度特征与典型风成沉积（如黄土、古土壤）相似，而与湖泊沉积以及河流沉积有较大差异。 |
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Based on the comparison of the restoring features of several common journal dimensions and in accordance with the shaft wearing character of large water pump, the treatment technique applying brush coast and hot spraying was discussed.
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摘要在比较几种常用轴颈尺寸修复特点的基础上，根据大型水泵轴轴承位磨损特徵，敍述了采用电刷镀和热喷涂处理技术修复水泵轴的工艺方法。 |
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Based on the comparison of two basic financial concepts, investment and arbitrage, the definitions for the arbitrage portfolio and its return are introduced, then their theoretical and practical implications are presented.
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摘要通过比较投资、套利这两个极其基本的金融概念及其相关的一些概念，严格导出了套利组合和套利组合收益率的概念，进而讨论了明确这些概念的理论及实际意义。 |
