Nowadays,education and teaching have become a hot topic,and teaching in colleges and universities is facing a brand-new development direction.Principles of Concrete Structure Design,as one of the main courses,transmit...Nowadays,education and teaching have become a hot topic,and teaching in colleges and universities is facing a brand-new development direction.Principles of Concrete Structure Design,as one of the main courses,transmits professional knowledge for students,enhances the students’professional ability,and further carries out in-depth research on the course to bring a better teaching effect for students.The article mainly focuses on the research of the principles of concrete structure design course,conducts an analysis of the teaching characteristics of the principles of concrete structure design course,and reasonably sets the teaching content from the optimization of the course teaching objectives;innovative course teaching methods can deepen the effect of knowledge understanding;reform of experimental practice teaching can lay down the effect of the internalization of knowledge,etc.The in-depth description and discussion of the relevant aspects of the research aim to provide guidelines for related research.展开更多
The uncertainty of the teaching content and teaching methods of English economy and trade translation course has alwaysbeen the core problem that restricts the development of the course education.This paper proposes t...The uncertainty of the teaching content and teaching methods of English economy and trade translation course has alwaysbeen the core problem that restricts the development of the course education.This paper proposes the design method and practiceprocess of the new teaching mode of English economy and trade translation course.Firstly,using marketing theory and economicand trade ideas,the content of English economy and trade translation course will be revised to construct a reasonable teaching con-tent system;Then,based on the above teaching content,the constructive theory is used as the guiding ideology to propose the class-room situational teaching mode and the extracurricular situational teaching mode,and complete the overall construction of the newteaching mode of English economy and trade translation course.The practical results show that the new teaching mode has obviousadvantages and has practical promotion value.展开更多
Minimizing disorder and defects is crucial for realizing the full potential of two-dimensional transition metal dichalcogenides(TMDs) materials and improving device performance to desired properties. However, the meth...Minimizing disorder and defects is crucial for realizing the full potential of two-dimensional transition metal dichalcogenides(TMDs) materials and improving device performance to desired properties. However, the methods in defect controlcurrently face challenges with overly large operational areas and a lack of precision in targeting specific defects. Therefore,we propose a new method for the precise and universal defect healing of TMD materials, integrating real-time imaging withscanning transmission electron microscopy (STEM). This method employs electron beam irradiation to stimulate the diffusionmigration of surface-adsorbed adatoms on TMD materials grown by low-temperature molecular beam epitaxy (MBE),and heal defects within the diffusion range. This approach covers defect repairs ranging from zero-dimensional vacancydefects to two-dimensional grain orientation alignment, demonstrating its universality in terms of the types of samples anddefects. These findings offer insights into the use of atomic-level focused electron beams at appropriate voltages in STEMfor defect healing, providing valuable experience for achieving atomic-level precise fabrication of TMD materials.展开更多
A new anchor-siphon drainage combined method used for slope stabilization is proposed in this paper.It includes an anchoring section and a siphon drainage section.The novelty of the anchor-siphon drainage combined met...A new anchor-siphon drainage combined method used for slope stabilization is proposed in this paper.It includes an anchoring section and a siphon drainage section.The novelty of the anchor-siphon drainage combined method is the realization of the drainage and anchoring in the one inclined borehole.The engineering cost of drilling and the resulting disturbance to the slope is reduced.To validate the feasibility of the proposed method,a numerical method that combines the pore water pressure distribution after siphon drainage and the anchoring force of the anchoring section is used to evaluate the safety of the slope with the anchor-siphon drainage method.The proposed method was illustrated and validated with the Hongpu Village landslide,in Tonglu County,Zhejiang Province,in China.Compared with the common anchor bar with the same length in the anchoring section,the factor of safety(FOS)for Hongpu Village slope with anchorsiphon drainage is increased by 0.085.The calculation method of the optimal length ratio between the drainage section and the anchoring section and its influencing factors were studied.For the different design parameters,there is always an optimal length ratio of the drainage section.Compared with the siphon drainage and full-length anchor bar with the same borehole length,the anchor-siphon drainage combined method shows better landslide prevention ability.Moreover,when the optimized parameters with a bond strength of 560kPa,a borehole inclination of 35°,and no reduction in length are used,the calculated safety factor is 1.316,which is significantly higher than the FOS of 1.131 for the slope with siphon drainage.展开更多
文摘Nowadays,education and teaching have become a hot topic,and teaching in colleges and universities is facing a brand-new development direction.Principles of Concrete Structure Design,as one of the main courses,transmits professional knowledge for students,enhances the students’professional ability,and further carries out in-depth research on the course to bring a better teaching effect for students.The article mainly focuses on the research of the principles of concrete structure design course,conducts an analysis of the teaching characteristics of the principles of concrete structure design course,and reasonably sets the teaching content from the optimization of the course teaching objectives;innovative course teaching methods can deepen the effect of knowledge understanding;reform of experimental practice teaching can lay down the effect of the internalization of knowledge,etc.The in-depth description and discussion of the relevant aspects of the research aim to provide guidelines for related research.
文摘The uncertainty of the teaching content and teaching methods of English economy and trade translation course has alwaysbeen the core problem that restricts the development of the course education.This paper proposes the design method and practiceprocess of the new teaching mode of English economy and trade translation course.Firstly,using marketing theory and economicand trade ideas,the content of English economy and trade translation course will be revised to construct a reasonable teaching con-tent system;Then,based on the above teaching content,the constructive theory is used as the guiding ideology to propose the class-room situational teaching mode and the extracurricular situational teaching mode,and complete the overall construction of the newteaching mode of English economy and trade translation course.The practical results show that the new teaching mode has obviousadvantages and has practical promotion value.
基金the Beijing Natural Science Foundation(Grant Nos.JQ24010 and Z220020)the Fundamental Research Funds for the Central Universities,and the National Natural Science Foundation of China(Grant No.52273279)Project supported by the Electron Microscopy Laboratory of Peking University,China for the use of Nion U-HERMES200 scanning transmission electron microscopy.We thank Materials Processing and Analysis Center,Peking University,for assistance with TEM characterization.The electron microscopy work was through a user project at Center of Oak Ridge National Laboratory(ORNL)for Nanophase Materials Sciences(CNMS),which is a DOE Office of Science User Facility.
文摘Minimizing disorder and defects is crucial for realizing the full potential of two-dimensional transition metal dichalcogenides(TMDs) materials and improving device performance to desired properties. However, the methods in defect controlcurrently face challenges with overly large operational areas and a lack of precision in targeting specific defects. Therefore,we propose a new method for the precise and universal defect healing of TMD materials, integrating real-time imaging withscanning transmission electron microscopy (STEM). This method employs electron beam irradiation to stimulate the diffusionmigration of surface-adsorbed adatoms on TMD materials grown by low-temperature molecular beam epitaxy (MBE),and heal defects within the diffusion range. This approach covers defect repairs ranging from zero-dimensional vacancydefects to two-dimensional grain orientation alignment, demonstrating its universality in terms of the types of samples anddefects. These findings offer insights into the use of atomic-level focused electron beams at appropriate voltages in STEMfor defect healing, providing valuable experience for achieving atomic-level precise fabrication of TMD materials.
基金the financial support of the National Natural Science Foundation of China(Key Project)(No.42230702)National Natural Science Foundation of China(No.42277129)Natural Science Foundation of Zhejiang Province(No.LY21D020001)。
文摘A new anchor-siphon drainage combined method used for slope stabilization is proposed in this paper.It includes an anchoring section and a siphon drainage section.The novelty of the anchor-siphon drainage combined method is the realization of the drainage and anchoring in the one inclined borehole.The engineering cost of drilling and the resulting disturbance to the slope is reduced.To validate the feasibility of the proposed method,a numerical method that combines the pore water pressure distribution after siphon drainage and the anchoring force of the anchoring section is used to evaluate the safety of the slope with the anchor-siphon drainage method.The proposed method was illustrated and validated with the Hongpu Village landslide,in Tonglu County,Zhejiang Province,in China.Compared with the common anchor bar with the same length in the anchoring section,the factor of safety(FOS)for Hongpu Village slope with anchorsiphon drainage is increased by 0.085.The calculation method of the optimal length ratio between the drainage section and the anchoring section and its influencing factors were studied.For the different design parameters,there is always an optimal length ratio of the drainage section.Compared with the siphon drainage and full-length anchor bar with the same borehole length,the anchor-siphon drainage combined method shows better landslide prevention ability.Moreover,when the optimized parameters with a bond strength of 560kPa,a borehole inclination of 35°,and no reduction in length are used,the calculated safety factor is 1.316,which is significantly higher than the FOS of 1.131 for the slope with siphon drainage.
