The following article has been retracted due to the investigation of complaints received against it. Mr. Mohammadali Ghorbani (corresponding author and also the last author) cheated the author’s name: Alireza Heidari...The following article has been retracted due to the investigation of complaints received against it. Mr. Mohammadali Ghorbani (corresponding author and also the last author) cheated the author’s name: Alireza Heidari. The scientific community takes a very strong view on this matter and we treat all unethical behavior such as plagiarism seriously. This paper published in Vol.3 No.3, 278-281, 2012, has been removed from this site.展开更多
Transformation acoustics are concentrated for the purpose of designing novel acoustic devices to tailor acoustic waves to achieve desirable characteristics. However, these devices require fluid or fluid-like materials...Transformation acoustics are concentrated for the purpose of designing novel acoustic devices to tailor acoustic waves to achieve desirable characteristics. However, these devices require fluid or fluid-like materials with an anisotropic density that generally does not exist in nature. Therefore, we introduce pentamode metamaterials into an alternating multilayer isotropic medium model to build fluid-like metamaterials with an anisotropic density. A 2D acoustic bending based on transformation acoustics is established and investigated to verify our method. This idea provides a method to design broadband and physically realizable acoustic metamaterials with an anisotropic density and is meaningful for the design of acoustic metamaterials.展开更多
As a key carrier for the implementation of the core quality of"aesthetic creativity",the effective realization of the aesthetic value of language textbook illustrations is facing the real problems of practic...As a key carrier for the implementation of the core quality of"aesthetic creativity",the effective realization of the aesthetic value of language textbook illustrations is facing the real problems of practical disconnection and theoretical gap.Based on the theories of semiotics,embodied cognition and cultural reproduction,this paper innovatively puts forward the concept of"transformation mechanism of aesthetic education",constructs a three-phase The study analyzes the dynamic transformation process of illustrations from image symbols to students'aesthetic experience.The study explains the essential characteristics of illustration as a dual symbolic system of"likenessregulation",reveals the cognitive ladder of"perception-cognition-creation"and the path of realization of embodied cognition,and points out that the current aesthetic education of illustration has the problem of instrumentalization,and that the current aesthetic education of illustration has the problem of instrumentalization.The study points out that the current aesthetic education of illustrations is plagued by instrumental alienation,cultural hegemony and aesthetic flattening,and proposes a"three-in-one"education path from the dimensions of teachers,teaching materials and culture,including improving teachers'aesthetic education,reconstructing the principles of teaching materials and dynamic revision mechanism,and constructing classroom aesthetic education communities.The study provides new perspectives and practical guidance for exploring the aesthetic value of language textbook illustrations and bridging the gap between the theories of aesthetics and pedagogy,aiming to promote the return of aesthetic education to the nature of"reconstruction of experience",and to cultivate students'aesthetic literacy and sound personality.展开更多
In concentric annular pipes,the difference in curvature between the inner and outer wall surfaces creates significant variations in the heat transfer characteristics of the two surfaces.The simplifications of the Ditt...In concentric annular pipes,the difference in curvature between the inner and outer wall surfaces creates significant variations in the heat transfer characteristics of the two surfaces.The simplifications of the Dittus-Boelter equation for circular pipes make it unsuitable for the complex flow induced by the geometry and heat transfer coupling effects in annular pipes.This prevents it from accurately predicting the turbulent heat transfer in concentric annular pipes.This paper used realizableκ–εand low Reynolds number models to conduct numerical simulations of turbulent convective heat transfer in concentric annular pipes and circular pipes.The results indicated that the local heat transfer coefficient and Nusselt number of the inner wall surface of the annular pipe were both higher than those of the outer wall surface.The Darcy resistance coefficient decreased upon increasing the Reynolds number and increased with the inner diameter-to-outer diameter ratio.When using the equivalent diameter as the characteristic scale,the turbulent heat transfer correlation obtained from circular pipes produced significant errors when used to approximate the turbulent convective heat transfer in concentric annular pipes.This error was greater for the inner wall surface,especially when the inner and outer diameters were relatively small,as the Nusselt number error on the inner wall surface reached 60.62%.The error of the Nusselt number on the outer wall surface reached 19.51%.展开更多
As a new type of production factor in healthcare,healthcare data elements have been rapidly integrated into various health production processes,such as clinical assistance,health management,biological testing,and oper...As a new type of production factor in healthcare,healthcare data elements have been rapidly integrated into various health production processes,such as clinical assistance,health management,biological testing,and operation and supervision[1,2].Healthcare data elements include biolog.ical and clinical data that are related to disease,environ-mental health data that are associated with life,and operational and healthcare management data that are related to healthcare activities(Figure 1).Activities such as the construction of a data value assessment system,the devel-opment of a data circulation and sharing platform,and the authorization of data compliance and operation products support the strong growth momentum of the market for health care data elements in China[3].展开更多
文摘The following article has been retracted due to the investigation of complaints received against it. Mr. Mohammadali Ghorbani (corresponding author and also the last author) cheated the author’s name: Alireza Heidari. The scientific community takes a very strong view on this matter and we treat all unethical behavior such as plagiarism seriously. This paper published in Vol.3 No.3, 278-281, 2012, has been removed from this site.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11004250 and 51275519
文摘Transformation acoustics are concentrated for the purpose of designing novel acoustic devices to tailor acoustic waves to achieve desirable characteristics. However, these devices require fluid or fluid-like materials with an anisotropic density that generally does not exist in nature. Therefore, we introduce pentamode metamaterials into an alternating multilayer isotropic medium model to build fluid-like metamaterials with an anisotropic density. A 2D acoustic bending based on transformation acoustics is established and investigated to verify our method. This idea provides a method to design broadband and physically realizable acoustic metamaterials with an anisotropic density and is meaningful for the design of acoustic metamaterials.
基金The 2026 Annual Project for the Improvement of Educational and Research Capabilities of Primary and Secondary School Teachers in Guangdong Province titled"Breaking Boundaries,Integration,and Empowerment:Innovative Practice Research on Teacher Training Courses for the Synergy of Aesthetic Education and Moral Education"(Host:Wenjiang Zhang)。
文摘As a key carrier for the implementation of the core quality of"aesthetic creativity",the effective realization of the aesthetic value of language textbook illustrations is facing the real problems of practical disconnection and theoretical gap.Based on the theories of semiotics,embodied cognition and cultural reproduction,this paper innovatively puts forward the concept of"transformation mechanism of aesthetic education",constructs a three-phase The study analyzes the dynamic transformation process of illustrations from image symbols to students'aesthetic experience.The study explains the essential characteristics of illustration as a dual symbolic system of"likenessregulation",reveals the cognitive ladder of"perception-cognition-creation"and the path of realization of embodied cognition,and points out that the current aesthetic education of illustration has the problem of instrumentalization,and that the current aesthetic education of illustration has the problem of instrumentalization.The study points out that the current aesthetic education of illustrations is plagued by instrumental alienation,cultural hegemony and aesthetic flattening,and proposes a"three-in-one"education path from the dimensions of teachers,teaching materials and culture,including improving teachers'aesthetic education,reconstructing the principles of teaching materials and dynamic revision mechanism,and constructing classroom aesthetic education communities.The study provides new perspectives and practical guidance for exploring the aesthetic value of language textbook illustrations and bridging the gap between the theories of aesthetics and pedagogy,aiming to promote the return of aesthetic education to the nature of"reconstruction of experience",and to cultivate students'aesthetic literacy and sound personality.
基金Supported by the Major Program of the National Natural Science Foundation of China(Grant No.51736007).
文摘In concentric annular pipes,the difference in curvature between the inner and outer wall surfaces creates significant variations in the heat transfer characteristics of the two surfaces.The simplifications of the Dittus-Boelter equation for circular pipes make it unsuitable for the complex flow induced by the geometry and heat transfer coupling effects in annular pipes.This prevents it from accurately predicting the turbulent heat transfer in concentric annular pipes.This paper used realizableκ–εand low Reynolds number models to conduct numerical simulations of turbulent convective heat transfer in concentric annular pipes and circular pipes.The results indicated that the local heat transfer coefficient and Nusselt number of the inner wall surface of the annular pipe were both higher than those of the outer wall surface.The Darcy resistance coefficient decreased upon increasing the Reynolds number and increased with the inner diameter-to-outer diameter ratio.When using the equivalent diameter as the characteristic scale,the turbulent heat transfer correlation obtained from circular pipes produced significant errors when used to approximate the turbulent convective heat transfer in concentric annular pipes.This error was greater for the inner wall surface,especially when the inner and outer diameters were relatively small,as the Nusselt number error on the inner wall surface reached 60.62%.The error of the Nusselt number on the outer wall surface reached 19.51%.
基金supported by National Natural Science Foundation of China(Grants 72474022,71974011,72174022,71972012,71874009)"BIT think tank"Promotion Plan of Science and Technology Innovation Program of Beijing Institute of Technology(Grants 2024CX14017,2023CX13029).
文摘As a new type of production factor in healthcare,healthcare data elements have been rapidly integrated into various health production processes,such as clinical assistance,health management,biological testing,and operation and supervision[1,2].Healthcare data elements include biolog.ical and clinical data that are related to disease,environ-mental health data that are associated with life,and operational and healthcare management data that are related to healthcare activities(Figure 1).Activities such as the construction of a data value assessment system,the devel-opment of a data circulation and sharing platform,and the authorization of data compliance and operation products support the strong growth momentum of the market for health care data elements in China[3].
