主题语境:个人成长与教育,篇幅:357词,建议用时:7分钟,In a remarkable academic feat,10-year-old Alisa Perales from San Bernardino is set to receive two associate degrees,becoming the youngest graduate in her schools histo...主题语境:个人成长与教育,篇幅:357词,建议用时:7分钟,In a remarkable academic feat,10-year-old Alisa Perales from San Bernardino is set to receive two associate degrees,becoming the youngest graduate in her schools history.According to California Community Colleges,she achieved these degrees in multiple sciences and mathematics with a near-perfect GPA.展开更多
With the continuous advancement of the internationalization of higher education in China,the Grade Point Average(GPA)has become a primary indicator for evaluating academic performance in universities,playing a positiv...With the continuous advancement of the internationalization of higher education in China,the Grade Point Average(GPA)has become a primary indicator for evaluating academic performance in universities,playing a positive role in educational management.However,as it is closely tied to students’immediate interests,such as awards,exemptions from entrance exams for postgraduate recommendations,and domestic or international further education,certain new issues have emerged in its practical application.These problems have hindered the effective functioning of the GPA system,attracting widespread attention.This paper examines the origin,connotation,and theoretical assumptions of the GPA system,discusses its positive functions and existing challenges,and proposes recommendations for further improving academic evaluation.展开更多
Granulomatosis with polyangiitis(GPA)poses significant therapeutic challenges due to its susceptibility to concurrent infections and frequent relapses.Professor SHI Zaixiang proposed the therapeutic theory of lifting ...Granulomatosis with polyangiitis(GPA)poses significant therapeutic challenges due to its susceptibility to concurrent infections and frequent relapses.Professor SHI Zaixiang proposed the therapeutic theory of lifting depression and removing blood stasis,resolving phlegm and dispelling nodulation for GPA management.He identified the core pathogenesis as“Qi collapse with collateral obstruction and phlegm-stasis intermingling”,establishing the treatment principle of comprehensive intervention through ascending ancestral Qi,activating blood circulation,and resolving phlegm-stasis nodules.In clinical practice,Professor SHI emphasizes maintaining immune homeostasis with herbal medicine to enhance efficiency,while dynamically balancing Qi,blood,Yin,and Yang.Notably,he highlights the critical role of emotional factors in autoimmune disease progression.A representative case was provided to elucidate his clinical reasoning in GPA treatment.展开更多
Ultra-high strength steels with a strength level of 2000 MPa are critical structural materials for some extreme service environments but face problems of low ductility and bad toughness.Current research effort s often...Ultra-high strength steels with a strength level of 2000 MPa are critical structural materials for some extreme service environments but face problems of low ductility and bad toughness.Current research effort s often focus on improving individual property,such as elongation or toughness.Therefore,it re-mains a significant challenge to unify both features of high strength,high ductility,and high toughness in one material.Adding precious metals such as Ni and Co and using aging treatment can achieve good strength and ductility in the maraging steels,but the cost is too high.In this study,we report a lean 2.4 GPa ultra-high-strength steel with a uniform elongation of 7.7%and a V-notched impact toughness of 29 J/cm^(2),which shows a competitive advantage compared with existing aircraft landing gear steels.The alloy composition design of“Mn+microalloying”and simple possessing route of quenching,deep cryo-genic treatment,and low-temperature annealing(Q-D-L)are used to achieve low-cost preparation.The transformation behaviors and mechanisms of strengthening,ductilizing,and toughening are discussed.The developed steel possesses a fine banded-equiaxed heterogeneous original austenite structure,where the CP4 occupies most of the equiaxed austenite,with more high-angle grain boundaries,and the marten-sitic variant of the banded structure is selectively weakened,resulting in a more uniform deformation,so that the crack nucleation energy and propagation energy can be simultaneously improved.Besides,the low aspect ratio structure originating from the fine parent austenite is beneficial to stimulating out-of-lath plane and in-lath plane multiple slip systems,compared with the coarse martensite with geometric lath constraints,thus increasing the deformation capability of martensite.Consequently,with the yield strength of the sample increased to 1960 MPa,the uniform elongation remained as high as 7.7%,indi-cating a notable improvement in both strength and ductility compared to samples with coarse banded austenite structures(1718 MPa&7.6%).This study provides new insights into alloy design and processing strategies for the synergistic enhancement of multiple properties in ultra-high-strength steels.展开更多
文摘主题语境:个人成长与教育,篇幅:357词,建议用时:7分钟,In a remarkable academic feat,10-year-old Alisa Perales from San Bernardino is set to receive two associate degrees,becoming the youngest graduate in her schools history.According to California Community Colleges,she achieved these degrees in multiple sciences and mathematics with a near-perfect GPA.
文摘With the continuous advancement of the internationalization of higher education in China,the Grade Point Average(GPA)has become a primary indicator for evaluating academic performance in universities,playing a positive role in educational management.However,as it is closely tied to students’immediate interests,such as awards,exemptions from entrance exams for postgraduate recommendations,and domestic or international further education,certain new issues have emerged in its practical application.These problems have hindered the effective functioning of the GPA system,attracting widespread attention.This paper examines the origin,connotation,and theoretical assumptions of the GPA system,discusses its positive functions and existing challenges,and proposes recommendations for further improving academic evaluation.
基金supported by the Seventh Batch of National Academic Experience Inheritance Project for Senior TCM Experts from the National Administration of Traditional Chinese Medicine(No.GZYRJS[2022]76)the Sixth Batch of Beijing Municipal Academic Experience Inheritance Project for TCM Experts from Beijing Administration of Traditional Chinese Medicine(No.JZYKZ[2019]139).
文摘Granulomatosis with polyangiitis(GPA)poses significant therapeutic challenges due to its susceptibility to concurrent infections and frequent relapses.Professor SHI Zaixiang proposed the therapeutic theory of lifting depression and removing blood stasis,resolving phlegm and dispelling nodulation for GPA management.He identified the core pathogenesis as“Qi collapse with collateral obstruction and phlegm-stasis intermingling”,establishing the treatment principle of comprehensive intervention through ascending ancestral Qi,activating blood circulation,and resolving phlegm-stasis nodules.In clinical practice,Professor SHI emphasizes maintaining immune homeostasis with herbal medicine to enhance efficiency,while dynamically balancing Qi,blood,Yin,and Yang.Notably,he highlights the critical role of emotional factors in autoimmune disease progression.A representative case was provided to elucidate his clinical reasoning in GPA treatment.
基金financially supported by the National Natural Science Foundation of China(Nos.52104371 and U21A20116)the Liaoning Province Science and Technology Plan Project(No.2022-MS-109)the State Key Laboratory of Solidification Processing in NWPU(Grant No SKLSP202311).
文摘Ultra-high strength steels with a strength level of 2000 MPa are critical structural materials for some extreme service environments but face problems of low ductility and bad toughness.Current research effort s often focus on improving individual property,such as elongation or toughness.Therefore,it re-mains a significant challenge to unify both features of high strength,high ductility,and high toughness in one material.Adding precious metals such as Ni and Co and using aging treatment can achieve good strength and ductility in the maraging steels,but the cost is too high.In this study,we report a lean 2.4 GPa ultra-high-strength steel with a uniform elongation of 7.7%and a V-notched impact toughness of 29 J/cm^(2),which shows a competitive advantage compared with existing aircraft landing gear steels.The alloy composition design of“Mn+microalloying”and simple possessing route of quenching,deep cryo-genic treatment,and low-temperature annealing(Q-D-L)are used to achieve low-cost preparation.The transformation behaviors and mechanisms of strengthening,ductilizing,and toughening are discussed.The developed steel possesses a fine banded-equiaxed heterogeneous original austenite structure,where the CP4 occupies most of the equiaxed austenite,with more high-angle grain boundaries,and the marten-sitic variant of the banded structure is selectively weakened,resulting in a more uniform deformation,so that the crack nucleation energy and propagation energy can be simultaneously improved.Besides,the low aspect ratio structure originating from the fine parent austenite is beneficial to stimulating out-of-lath plane and in-lath plane multiple slip systems,compared with the coarse martensite with geometric lath constraints,thus increasing the deformation capability of martensite.Consequently,with the yield strength of the sample increased to 1960 MPa,the uniform elongation remained as high as 7.7%,indi-cating a notable improvement in both strength and ductility compared to samples with coarse banded austenite structures(1718 MPa&7.6%).This study provides new insights into alloy design and processing strategies for the synergistic enhancement of multiple properties in ultra-high-strength steels.
