检索结果-南通市图书馆

Estimating relative diffusion from 3D micro-CT images using CNNs

Artificial Intelligence in Geosciences 2023年第1期4卷 199-208页

作者： Stephan Gättner Florian Frank Fabian Woller Andreas Meier Nadja Ray Friedrich-Alexander-Universitat Erlangen-Nürnberg Department MathematikCauerstraβe 11Erlangen91058Germany Math2 Market GmbH Richard-Wagner-Straβe 1Kaiserslautern67655Germany Mathematical Institute for Machine Learning and Data Science Goldknopfgasse 7Ingolstadt49085Germany

In recent years,convolutional neural networks(CNNs)have demonstrated their effectiveness in predicting bulk parameters,such as effective diffusion,directly from pore-space *** offer significant computational advantages over traditional methods,making them particularly ***,the current literature primarily focuses on fully saturated porous media,while the partially saturated case is also of high interest for various *** saturated conditions present more complex geometries for diffusive transport,making the prediction task more *** CNNs tend to lose robustness and accuracy with lower saturation *** this paper,we overcome this limitation by introducing a CNN,which conveniently fuses diffusion prediction and a well-established morphological model that describes phase distributions in partially saturated porous *** demonstrate the ability of our CNN to perform accurate predictions of relative diffusion directly from full pore-space ***,we compare our predictions with well-established relations such as the one by Millington–Quirk.

关键词： Digital rock Neural networks Deep learning Relative diffusion partial saturation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pellet mixtures in isolation barriers

引用

Journal of Rock Mechanics and Geotechnical Engineering 2010年第1期2卷 12-31页

作者： E. E. Alonso C. Hoffmann E. Romero Technical University of Catalonia

Granular mixtures made of high-density pellets of bentonite are being evaluated as an alternative buffer material for waste isolation. Ease of handling is an often-mentioned advantage. The paper describes the experimental program performed to characterize the hydro-mechanical （HM） behaviour of compacted pellet mixtures. Grain size distribution was adjusted to a maximum pellet size compatible with the specimen＇s dimensions. Dry densities of statically compacted specimens varied in most of the cases in the range from 1.3 to 1.5 Mg/m^3. Pellets had a very high dry density, close to 2 Mg/m^3. The outstanding characteristic of these mixtures is their discontinuous porosity. Pore sizes of the compacted pellets varied around 10 nm. However, the inter-pellet size of the pores was four to five orders of magnitude higher. This double porosity and the highly expansive nature of the pellets controlled all the hydraulic and mechanical properties of the mixture. Performed tests include infiltration tests using different water injection rates and mechanisms of water transfer （in liquid and vapour phases）, suction-controlled oedometer tests and swelling pressure tests. The interpretation of some performed tests required back analysis procedures using a hydro-mechanical （HM） computer code. Material response was studied within the framework of the elastoplastic constitutive model proposed by Alonso et al. （1990）（Barcelona basic model, BBM）. Parameters for the model were identified and also a set of hydraulic laws are necessary to perform coupled HM analysis. A large scale in-situ test （the ＂EB＂ test in Mont Terri, Switzerland） was described and analyzed. Rock barrier parameters were adjusted on the basis of available tests. The test excavation, barrier emplacement and forced hydration were simulated by means of the CODEBRIGHT program. The comparison between measurements and computed results include data on relative humidity in the rock and the buffer, swelling pressures and displ

关键词： bentonite partial saturation suction granular mixture in-situ test hydro-mechanical model nuclear waste disposal excavation disturbed zone

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：