【摘 要】
：
This paper aims to propose an explicit formulation of the macroscopic strength criterion for porous media with spherical voids.The matrix is assumed rigid and perfectly plastic with yield surface described by the three-parameter strength criterion,which i
【机 构】
：
InstituteofDeepEarthSciencesandGreenEnergy,SchoolofNavalArchitecture,DepartmentofEngineeringScience,
【基金项目】
：
partially supported by the National Natural Science Foundation of China(Grant No.51804203)。
论文部分内容阅读
This paper aims to propose an explicit formulation of the macroscopic strength criterion for porous media with spherical voids.The matrix is assumed rigid and perfectly plastic with yield surface described by the three-parameter strength criterion,which i
其他文献
以1,3,5,7-四氨基金刚烷与4-碘苯基酰氯为原料,经酰化、氧化反应,制备了新型金刚烷负载的高价碘试剂(1a-1c).酰化反应以CH2Cl2为溶剂,首先,0℃,反应4 h,然后室温反应2 h,投料
以谷子品种大金苗为研究对象,采用遮雨棚控水的大田试验方法,比较孕穗开花期和灌浆期水分胁迫/复水对叶片光合特性及产量影响,分析光合速率的限制因素,阐述光合速率、水分利用效率与产量的协同关系。结果表明:水分胁迫会导致谷子光合速率和产量下降,水分利用效率提高,随胁迫增强和持续时间延长,光合速率和产量下降幅度增大;水分胁迫后复水后,光合性能有所恢复,光合作用可产生补偿效应,水分胁迫越强和持续时间越长,补偿效应越低;轻度和持续时间短的水分胁迫,光合速率降低主要由气孔因素决定,随胁迫增强和持续时间延长,非气孔限制逐渐
Recently,Zou et al.(2020a) published a theoretical analysis on the radial flow of a Bingham fluid,where they argued that the classical analysis by Dai and Bird
为明确反应机理和反应历程,优化反应工艺条件,开展了在硝酸体系中以草酸为还原剂、Mn2+为催化剂催化硝酸氧化草酸的动力学研究.通过考察草酸浓度、硝酸浓度等反应条件对反应
The influence of rock mechanical properties on the electromagnetic radiation(EMR)mechanism of rock fracturing is an important research topic in solid mechanics and earthquake prediction.In this study,an EMR model of rock fracturing considering the fractur
As a potential engineered barrier material for disposal of radioactive waste in clay formations,claystone aggregate excavated from the Opalinus clay(OPA),its mixture with bentonite MX80 in a mass ratio of 7/3,and pure bentonite were extensively investigat
基于2015—2016年福建、广东青枣主产区田间试验的62个鲜果样本主要品质要素,采用相关分析、加权指数求和法,结合文献查阅、专家调研以及常规农业气象条件定量化等级评价标准,筛选影响青枣品质的关键气候因子,构建青枣气候品质等级评价模型,并利用2014—2019年青枣产区36个独立样本进行验证,分析福建主产区青枣气候品质时空分布规律。结果表明:影响青枣品质的3个关键气候因子分别为采收前90 d平均气温、采收前30 d气温日较差和采收前30 d日照时数,模型准确率达86.1%,青枣气候品质等级评价模型可客观反
采用增强型脂质去除吸附剂(Enhanced Matrix Removal-lipid,EMR-Lipid)对样品进行净化,结合超高效液相色谱-串联质谱(UPLC-MS/MS)检测,建立快速测定动物源性食品中5种α2-受
以东北春大豆为研究对象,分早熟、中熟和晚熟3类熟型构建东北春大豆气候区划指标.利用基于模糊数学的区划指标隶属度函数和作物反应函数两种气候适宜度评价方法,结合精细化插
The complex geometric features of subsurface fractures at different scales makes mesh generation challenging and/or expensive.In this paper,we make use of neural style transfer(NST),a machine learning technique,to generate mesh from rock fracture images.I