double series meaning in English
二重级数
Examples
- Convergent double series
收敛二重级数 - As a method to classify the arable land , study on " the reference unh . s " method started in china not long ago . until now , double series of reference units whose qualities are the best or the worst respectively have not been applied to evaluate arable land at county level
样地法作为一种耕地等别划分的方法，在我国的研究刚刚起步，迄今为止，我国还没有采用优质、劣质双向式标准样地在县域内划分耕地等别的相关研究。 - In conclusion , by the setting and application of double series of reference land units , we can get reasonable classification results ; moreover , the reference land units method has some study and application values which can provide as a reference method or model for other counties in china
总之。优质、劣质双向式标准样地体系的建立与应用，不仅能够得到可靠的分等结果，而且具有一定的研究与应用价值，可为我国县域样地法分等提供方法与模式参照。 - In the paper , firstly , present the formulation and application of proper orthogonal decomposition of covariance and cross - power spectral density matrices are presented in the analysis of wind load effects on structures . then the dynamic response of linear structures subjected to random loads is analyzed by a technique called double modal transformation ( dmt ) that is expressed through a double series whose terms depend on structural and loading modes
本论文中首先通过求相关矩阵和互功率谱密度矩阵特征值问题给出了本征正交分解的公式，并利用pod与结构模态相结合的双模态方法来分析结构的动态响应，主要讨论了截断高阶荷载模态对风致响应的影响。 - The elementary idea of the reference units method can be described as follows : firstly , by the setting of double series of reference units , we can control the highest and lowest land quality class of each village or town ; secondly , the class of the arable land will be get through the contrast between the arable land with the reference unit which has been selected in the same area , the difference in quality is the key factor to classify the land . the results show , 87 . 6 % of the lands from i to iii distribute on alluvial and lacustrine plains , where the associated soils are mainly grey fulvo - aquic and calcareous concretions black ones . and 61 . 4 % of them from iv to vi distribute on slightly rolling parts with mainly yellow - cinnamon soil developed from the diluvial and slope deposits
分等结果表明：卧龙区等的耕地中，有87 . 6分布在冲积、湖积平原区，主要土壤类型是在河流冲积物上发育形成的灰潮土、在湖相沉积物上发育形成的砂姜黑土；等耕地中，有61 . 4分布在垄岗区，主要土壤类型是洪坡积物上发育形成的黄褐土：而、等耕地集中分布在丘陵区，主要土壤类型是残坡积物上发育形成的粗骨性黄褐土，等别结果分布总体上体现了不同地貌类型、土壤条件下耕地质量的差异。