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A Modifi ed Molecular Structure Mechanics Method for Analysis of Graphene
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作者 华军 LI Dongbo +3 位作者 ZHAO Dong LIANG Shengwei LIU Qinlong JIA Ruiyan 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第6期1172-1178,共7页
Based on molecular mechanics and the deformation characteristics of the atomic lattice structure of graphene, a modifi ed molecular structure mechanics method was developed to improve the original one, that is, the se... Based on molecular mechanics and the deformation characteristics of the atomic lattice structure of graphene, a modifi ed molecular structure mechanics method was developed to improve the original one, that is, the semi-rigid connections were used to model the bond angle variations between the C-Cbonds in graphene. The simulated results show that the equivalent space frame model with semi-rigid connections for graphene proposed in this article is a simple, efficient, and accurate model to evaluate the equivalent elastic properties of graphene. Though the present computational model of the semi-rigid connected space frame is only applied to characterize the mechanical behaviors of the space lattices of graphene, it has more potential applications in the static and dynamic analyses of graphene and other nanomaterials. 展开更多
关键词 graphene molecular structure mechanics semi-rigid connections mechanical properties
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有机污染物的生物富集因子与拓扑指数的数学模型 被引量:11
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作者 冯长君 沐来龙 +1 位作者 杨伟华 蔡可迎 《物理化学学报》 SCIE CAS CSCD 北大核心 2008年第6期1053-1057,共5页
依据价连接性指数(xi)、电性拓扑态指数(ej)及电性距离矢量(mk)构建239种有机污染物生物富集因子(FBC)的6参数QSFR(定量结构-生物富集因子相关性)模型,不仅相关程度高,而且所用自变量数少.该模型的传统相关系数(R2)为0.821,LOO(levae-on... 依据价连接性指数(xi)、电性拓扑态指数(ej)及电性距离矢量(mk)构建239种有机污染物生物富集因子(FBC)的6参数QSFR(定量结构-生物富集因子相关性)模型,不仅相关程度高,而且所用自变量数少.该模型的传统相关系数(R2)为0.821,LOO(levae-one-out)交互验证系数(Q2)为0.809,证明具有良好的稳健性及预测能力.根据进入该模型的6个参数可知,影响有机污染物FBC的主要结构基团是:—C—、、—O—、—X、—NH2以及分子的柔韧性、折叠程度等空间因素.可以认为在生物富集过程中,"诱导契合机理"也发挥一定作用.对自变量集进行正交变换,既不影响模型的相关性,又能降低其自相关性. 展开更多
关键词 有机污染物 生物富集因子 价连接性指数 电性拓扑态指数 电性距离矢量 诱导契合机理 定量构效关系(QSAR)
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