The comprehension of sediment grain size parameters and the corresponding sedimentary environment holds paramount importance in elucidating the engineering geological attributes of the subaqueous seabed.This study del...The comprehension of sediment grain size parameters and the corresponding sedimentary environment holds paramount importance in elucidating the engineering geological attributes of the subaqueous seabed.This study delineated the sedimentary environment zoning in the northern sea area of Qingdao through cluster analysis of grain size parameters derived from 123 surface sediment samples.The study analyzed the correlation between sediment geotechnical indices and grain size parameters across diverse sedimentary environments.A correlation equation was established for samples exhibiting a strong correlation.The study found four distinct sedimentary environments in the study area:coastal,transitional,shallow sea,and residual.Within the same sedimentary environment,the average grain size and sorting coefficient exhibit significant correlations with geotechnical indices such as water content,density,shear strength,plastic limit,liquid limit,and plastic index.However,notable disparities in the correlation between grain size parameters and geotechnical indices emerge across different sedimentary environments.展开更多
在常压下用烧结法制备了具有高有序晶列结构的Bi4Si3O12微晶。利用X射线衍射(X-ray diffraction,XRD)和环境扫描电镜(Environmental Scanning Electron Microscopy,ESEM)分析了生成晶体的物相和微观形貌。结果表明:生成的是纯的立方相Bi...在常压下用烧结法制备了具有高有序晶列结构的Bi4Si3O12微晶。利用X射线衍射(X-ray diffraction,XRD)和环境扫描电镜(Environmental Scanning Electron Microscopy,ESEM)分析了生成晶体的物相和微观形貌。结果表明:生成的是纯的立方相Bi4Si3O12晶体。Bi4Si3O12晶粒总是成对分布,且排列成行,从而形成高有序的晶列结构。其晶粒尺寸变化趋势有两种,一种是逐渐增大或者减小,另一种是晶粒尺寸在某一区域值内基本保持不变。在大多数情况下,每个晶行两侧的晶粒变化趋势具有一致性,每行两侧的晶粒尺寸具有高度的正相关特性。如果某行两侧的晶粒尺寸变化趋势不一致,而且晶粒尺寸不相关,则该行两侧晶粒应该属于两种不同的变化趋势。展开更多
基金funded by the National Key R&D Program Project(No.2022YFC3103604).
文摘The comprehension of sediment grain size parameters and the corresponding sedimentary environment holds paramount importance in elucidating the engineering geological attributes of the subaqueous seabed.This study delineated the sedimentary environment zoning in the northern sea area of Qingdao through cluster analysis of grain size parameters derived from 123 surface sediment samples.The study analyzed the correlation between sediment geotechnical indices and grain size parameters across diverse sedimentary environments.A correlation equation was established for samples exhibiting a strong correlation.The study found four distinct sedimentary environments in the study area:coastal,transitional,shallow sea,and residual.Within the same sedimentary environment,the average grain size and sorting coefficient exhibit significant correlations with geotechnical indices such as water content,density,shear strength,plastic limit,liquid limit,and plastic index.However,notable disparities in the correlation between grain size parameters and geotechnical indices emerge across different sedimentary environments.
文摘在常压下用烧结法制备了具有高有序晶列结构的Bi4Si3O12微晶。利用X射线衍射(X-ray diffraction,XRD)和环境扫描电镜(Environmental Scanning Electron Microscopy,ESEM)分析了生成晶体的物相和微观形貌。结果表明:生成的是纯的立方相Bi4Si3O12晶体。Bi4Si3O12晶粒总是成对分布,且排列成行,从而形成高有序的晶列结构。其晶粒尺寸变化趋势有两种,一种是逐渐增大或者减小,另一种是晶粒尺寸在某一区域值内基本保持不变。在大多数情况下,每个晶行两侧的晶粒变化趋势具有一致性,每行两侧的晶粒尺寸具有高度的正相关特性。如果某行两侧的晶粒尺寸变化趋势不一致,而且晶粒尺寸不相关,则该行两侧晶粒应该属于两种不同的变化趋势。
