Triaxial testing serves as a fundamental method for evaluating the elastic and strength properties of rocks,crucial for developing accurate 3D geomechanical models.This paper presents a novel method for determining st...Triaxial testing serves as a fundamental method for evaluating the elastic and strength properties of rocks,crucial for developing accurate 3D geomechanical models.This paper presents a novel method for determining strength parameters by incorporating the dependence of uniaxial compressive strength(UCS)on P-wave velocity into the Hoek-Brown criterion.Additionally,a new approach is introduced to process triaxial test data efficiently using Python libraries such as SciPy,NumPy,Matplotlib,and Pandas.Furthermore,the paper addresses challenges in determining elastic parameters through triaxial testing.A Python script is developed to automate the calculation of elastic modulus and Poisson's ratio,over-coming subjectivity in selecting the linear portion of stress-strain curves.The script optimally identifies the linear region by minimizing the fit error with appropriate constraints,ensuring a more objective and standardized approach.The proposed methodologies are demonstrated using limestone specimens from Central Asian gas fields.These innovations offer faster,more reliable results,reducing error and enhancing the comparability of analyses in geomechanics,with potential applications across various geological settings.展开更多
The phase field model can coherently address the relatively complex fracture phenomenon,such as crack nucleation,branching,deflection,etc.The model has been extensively implemented in the finite element package Abaqus...The phase field model can coherently address the relatively complex fracture phenomenon,such as crack nucleation,branching,deflection,etc.The model has been extensively implemented in the finite element package Abaqus to solve brittle fracture problems in recent studies.However,accurate numerical analysis typically requires fine meshes to model the evolving crack path effectively.A broad region must be discretized without prior knowledge of the crack path,further augmenting the computational expenses.In this proposed work,we present an automated framework utilizing a posteriori error-indicator(MISESERI)to demarcate and sufficiently refine the mesh along the anticipated crack path.This eliminates the need for manual mesh refinement based on previous experimental/computational results or heuristic judgment.The proposed Python-based framework integrates the preanalysis,sufficient mesh refinement,and subsequent phase-field model-based numerical analysis with user-defined subroutines in a single streamlined pass.The novelty of the proposed work lies in integrating Abaqus’s native error estimation and mesh refinement capability,tailored explicitly for phase-field simulations.The proposed methodology aims to reduce the computational resource requirement,thereby enhancing the efficiency of the phase-field simulations while preserving the solution accuracy,making the framework particularly advantageous for complex fracture problems where the computational/experimental results are limited or unavailable.Several benchmark numerical problems are solved to showcase the effectiveness and accuracy of the proposed approach.The numerical examples present the proposed approach’s efficacy in the case of a complex mixed-mode fracture problem.The results show significant reductions in computational resources compared to traditional phase-field methods,which is promising.展开更多
Both the Todo Alphabet written with bambuu pen that is kept by Burintögs Khagai in County Zhaosu and the one written with soft brush that is kept by Namrjil Vjar have distinct characteristics in symbols for vowel...Both the Todo Alphabet written with bambuu pen that is kept by Burintögs Khagai in County Zhaosu and the one written with soft brush that is kept by Namrjil Vjar have distinct characteristics in symbols for vowels,consonants,terminal letters and transcription letters.The two of them fundamentally adhered to the orthography established by Zaya Pandida and most likely were compiled in the transitional phase of the todo script.展开更多
Todo Mongolian ancient books are widely scattered among people,and many scholars have made ef⁃forts to collect and organize Todo Mongolian ancient books.Mr.Batu is one of the outstanding representa⁃tives.The ancient b...Todo Mongolian ancient books are widely scattered among people,and many scholars have made ef⁃forts to collect and organize Todo Mongolian ancient books.Mr.Batu is one of the outstanding representa⁃tives.The ancient books and related materials,notes,and other materials Todo Mongolian script he col⁃lected in are rich in content and have extremely high research value.They can provide valuable firsthand information for the academic community and promote in-depth research on the Tote Mongolian lan⁃guage.It is necessary to photocopy and publish them.展开更多
Professor D.Taya’s research on“Buryat Geser in Traditional Mongolian Script”fills the information gap in the inheritance of Buryat Geser texts.It is the first specialized study to explore the inheritance rules of B...Professor D.Taya’s research on“Buryat Geser in Traditional Mongolian Script”fills the information gap in the inheritance of Buryat Geser texts.It is the first specialized study to explore the inheritance rules of Buryat Geser texts and conduct statistical research on their preservation,providing valuable aca⁃demic materials for future research on the inheritance of Geser texts and traditional Mongolian language.展开更多
The inaugural"Belt and Road Nepal-China Buddhist Culture and Art Summit Forum"was held at the Lumbini Buddhist University in Nepal.The"Faxian-Xuanzang Scholarship Fund",jointly established by the C...The inaugural"Belt and Road Nepal-China Buddhist Culture and Art Summit Forum"was held at the Lumbini Buddhist University in Nepal.The"Faxian-Xuanzang Scholarship Fund",jointly established by the Chinese Culture Promotion Society and the Lumbini Buddhist University,was officially launched during the forum.The programme aims to support 100 Chinese and Nepali students in the next three years in conducting specialised research in such fields as Buddhist art and historical scripts.展开更多
Based on LabVlEW platform, a distributed dynamic storage testing system is designed for measuring transient high temperature signals of explosion field. Using a highpower semiconductor laser as heat source, a traceabl...Based on LabVlEW platform, a distributed dynamic storage testing system is designed for measuring transient high temperature signals of explosion field. Using a highpower semiconductor laser as heat source, a traceable dynamic calibration system is established to perform dynamic calibration of thermocouples. With quantumbehaved particle swam optimization （QP-SO） algorithm on MATLAB platform, a model of dynamic compensation filter is established. It is used by LabVIEW that calls MATLAB Script nodes or COM components to accomplish the mixed programming of LabVIEW and MATLAB, further to compensate the temperature values of the thermocouples dynamically. The experimental results show that the technique that combines temperature measurement system with LabVIEW platform is applied well in testing the explosion temperature of ther mobaric weaponry and makes the compensation values closer to the actual signals.展开更多
文摘Triaxial testing serves as a fundamental method for evaluating the elastic and strength properties of rocks,crucial for developing accurate 3D geomechanical models.This paper presents a novel method for determining strength parameters by incorporating the dependence of uniaxial compressive strength(UCS)on P-wave velocity into the Hoek-Brown criterion.Additionally,a new approach is introduced to process triaxial test data efficiently using Python libraries such as SciPy,NumPy,Matplotlib,and Pandas.Furthermore,the paper addresses challenges in determining elastic parameters through triaxial testing.A Python script is developed to automate the calculation of elastic modulus and Poisson's ratio,over-coming subjectivity in selecting the linear portion of stress-strain curves.The script optimally identifies the linear region by minimizing the fit error with appropriate constraints,ensuring a more objective and standardized approach.The proposed methodologies are demonstrated using limestone specimens from Central Asian gas fields.These innovations offer faster,more reliable results,reducing error and enhancing the comparability of analyses in geomechanics,with potential applications across various geological settings.
文摘The phase field model can coherently address the relatively complex fracture phenomenon,such as crack nucleation,branching,deflection,etc.The model has been extensively implemented in the finite element package Abaqus to solve brittle fracture problems in recent studies.However,accurate numerical analysis typically requires fine meshes to model the evolving crack path effectively.A broad region must be discretized without prior knowledge of the crack path,further augmenting the computational expenses.In this proposed work,we present an automated framework utilizing a posteriori error-indicator(MISESERI)to demarcate and sufficiently refine the mesh along the anticipated crack path.This eliminates the need for manual mesh refinement based on previous experimental/computational results or heuristic judgment.The proposed Python-based framework integrates the preanalysis,sufficient mesh refinement,and subsequent phase-field model-based numerical analysis with user-defined subroutines in a single streamlined pass.The novelty of the proposed work lies in integrating Abaqus’s native error estimation and mesh refinement capability,tailored explicitly for phase-field simulations.The proposed methodology aims to reduce the computational resource requirement,thereby enhancing the efficiency of the phase-field simulations while preserving the solution accuracy,making the framework particularly advantageous for complex fracture problems where the computational/experimental results are limited or unavailable.Several benchmark numerical problems are solved to showcase the effectiveness and accuracy of the proposed approach.The numerical examples present the proposed approach’s efficacy in the case of a complex mixed-mode fracture problem.The results show significant reductions in computational resources compared to traditional phase-field methods,which is promising.
文摘Both the Todo Alphabet written with bambuu pen that is kept by Burintögs Khagai in County Zhaosu and the one written with soft brush that is kept by Namrjil Vjar have distinct characteristics in symbols for vowels,consonants,terminal letters and transcription letters.The two of them fundamentally adhered to the orthography established by Zaya Pandida and most likely were compiled in the transitional phase of the todo script.
文摘Todo Mongolian ancient books are widely scattered among people,and many scholars have made ef⁃forts to collect and organize Todo Mongolian ancient books.Mr.Batu is one of the outstanding representa⁃tives.The ancient books and related materials,notes,and other materials Todo Mongolian script he col⁃lected in are rich in content and have extremely high research value.They can provide valuable firsthand information for the academic community and promote in-depth research on the Tote Mongolian lan⁃guage.It is necessary to photocopy and publish them.
文摘Professor D.Taya’s research on“Buryat Geser in Traditional Mongolian Script”fills the information gap in the inheritance of Buryat Geser texts.It is the first specialized study to explore the inheritance rules of Buryat Geser texts and conduct statistical research on their preservation,providing valuable aca⁃demic materials for future research on the inheritance of Geser texts and traditional Mongolian language.
文摘The inaugural"Belt and Road Nepal-China Buddhist Culture and Art Summit Forum"was held at the Lumbini Buddhist University in Nepal.The"Faxian-Xuanzang Scholarship Fund",jointly established by the Chinese Culture Promotion Society and the Lumbini Buddhist University,was officially launched during the forum.The programme aims to support 100 Chinese and Nepali students in the next three years in conducting specialised research in such fields as Buddhist art and historical scripts.
基金The 11th Postgraduate Technology Innovation Project of North University of China(No.20141147)
文摘Based on LabVlEW platform, a distributed dynamic storage testing system is designed for measuring transient high temperature signals of explosion field. Using a highpower semiconductor laser as heat source, a traceable dynamic calibration system is established to perform dynamic calibration of thermocouples. With quantumbehaved particle swam optimization （QP-SO） algorithm on MATLAB platform, a model of dynamic compensation filter is established. It is used by LabVIEW that calls MATLAB Script nodes or COM components to accomplish the mixed programming of LabVIEW and MATLAB, further to compensate the temperature values of the thermocouples dynamically. The experimental results show that the technique that combines temperature measurement system with LabVIEW platform is applied well in testing the explosion temperature of ther mobaric weaponry and makes the compensation values closer to the actual signals.
