Based on the study of the Mechanical Design and Automation major and its relevance to teaching reform in higher education engineering programs,a project-based teaching model was introduced.This approach integrates tea...Based on the study of the Mechanical Design and Automation major and its relevance to teaching reform in higher education engineering programs,a project-based teaching model was introduced.This approach integrates teaching design,scheme argumentation,and the implementation of teaching activities with the project serving as the central framework.Course knowledge points are derived from the project topics,forming the foundation for a structured knowledge framework.The course content is modularized in alignment with the project design,enabling students to engage with professional courses on a module-by-module basis,guided by the project.Each course utilizes the project topic as a practical case,facilitating project-led teaching.A teaching system tailored to the research project is proposed,establishing a professional course structure closely linked to the project objectives.展开更多
This paper mainly discusses the innovative teaching mode of translation for English Majors under the guidance of OBE education philosophy.Firstly,by analyzing the current situation of translation teaching for English ...This paper mainly discusses the innovative teaching mode of translation for English Majors under the guidance of OBE education philosophy.Firstly,by analyzing the current situation of translation teaching for English majors,this paper points out the main problems,and combined with the OBE education concept,through optimizing the top-level design,updating the teaching content,improving the teaching methods,and scientifically using the evaluation methods,constructs a student-centered and outcome-oriented teaching mode.It is hoped that this study can improve students’translation ability and comprehensive quality,and provide a useful reference for the reform of translation teaching for English majors.展开更多
Recently,the Fog-Radio Access Network(F-RAN)has gained considerable attention,because of its flexible architecture that allows rapid response to user requirements.In this paper,computational offloading in F-RAN is con...Recently,the Fog-Radio Access Network(F-RAN)has gained considerable attention,because of its flexible architecture that allows rapid response to user requirements.In this paper,computational offloading in F-RAN is considered,where multiple User Equipments(UEs)offload their computational tasks to the F-RAN through fog nodes.Each UE can select one of the fog nodes to offload its task,and each fog node may serve multiple UEs.The tasks are computed by the fog nodes or further offloaded to the cloud via a capacity-limited fronhaul link.In order to compute all UEs'tasks quickly,joint optimization of UE-Fog association,radio and computation resources of F-RAN is proposed to minimize the maximum latency of all UEs.This min-max problem is formulated as a Mixed Integer Nonlinear Program(MINP).To tackle it,first,MINP is reformulated as a continuous optimization problem,and then the Majorization Minimization(MM)method is used to find a solution.The MM approach that we develop is unconventional in that each MM subproblem is solved inexactly with the same provable convergence guarantee as the exact MM,thereby reducing the complexity of MM iteration.In addition,a cooperative offloading model is considered,where the fog nodes compress-and-forward their received signals to the cloud.Under this model,a similar min-max latency optimization problem is formulated and tackled by the inexact MM.Simulation results show that the proposed algorithms outperform some offloading strategies,and that the cooperative offloading can exploit transmission diversity better than noncooperative offloading to achieve better latency performance.展开更多
Against the backdrop of the high-quality development of vocational education,the construction of“double-qualified”teacher teams has shifted from focusing on quantity growth to emphasizing the improvement of“double-...Against the backdrop of the high-quality development of vocational education,the construction of“double-qualified”teacher teams has shifted from focusing on quantity growth to emphasizing the improvement of“double-qualified”competencies.How to strengthen the quality-oriented construction of“double-qualified”teacher teams,give full play to the role of“double-qualified”teachers,promote the construction and teaching reform of tourism majors,and enhance the quality of tourism talent cultivation have become key issues faced by higher vocational tourism majors.Taking higher vocational tourism majors as an example,this paper analyzes the problems encountered in the construction of tourism-related“double-qualified”teacher teams,puts forward strategies for such construction,and explores the impact of building“double-qualified”teacher teams on the quality of talent cultivation in tourism majors.It aims to provide references for the coordinated improvement of the construction of“double-qualified”teacher teams and the quality of talent cultivation in higher vocational tourism majors.展开更多
With the in-depth advancement of vocational education reform,the concept of“Mass Entrepreneurship and Innovation”has emerged at the historic moment.Integrating“Mass Entrepreneurship and Innovation”education into t...With the in-depth advancement of vocational education reform,the concept of“Mass Entrepreneurship and Innovation”has emerged at the historic moment.Integrating“Mass Entrepreneurship and Innovation”education into the teaching of computer-related professional courses in vocational schools is conducive to cultivating high-quality applied talents.Based on this,this paper deeply analyzes the connotation and characteristics of“Mass Entrepreneurship and Innovation”education,and examines the current status and existing problems of integrating such education into computer-related professional courses.Furthermore,it proposes optimization strategies from aspects including the formulation of course objectives,the reconstruction of teaching content,the innovation of teaching methods,the development of teaching staff,and the construction of practical platforms.The purpose is to enhance students’innovative thinking,entrepreneurial capabilities,and professional skills,and to provide professional talents with“Mass Entrepreneurship and Innovation”literacy for the development of the computer industry.展开更多
The construction of new liberal arts emphasizes interdisciplinary integration and the cultivation of compound talents,providing new opportunities for the collaborative development of foreign language majors and touris...The construction of new liberal arts emphasizes interdisciplinary integration and the cultivation of compound talents,providing new opportunities for the collaborative development of foreign language majors and tourism majors in universities.The“foreign language+tourism”teaching model,by integrating the instrumental nature of language and the applied nature of tourism,aims to cultivate compound talents with both cross-cultural communication skills and practical capabilities in the tourism industry.Based on the background of new liberal arts,this paper analyzes the current status and challenges of“foreign language+tourism”teaching in universities,and proposes specific teaching paths from the dimensions of curriculum system reconstruction,teaching model innovation,faculty team optimization,and evaluation mechanism improvement,aiming to provide a theoretical reference for cultivating high-quality talents adapted to the high-quality development needs of the cultural and tourism industry.展开更多
Innovation and entrepreneurship education is an important part of higher education.It adapts to the current era background of mass innovation and entrepreneurship,and is also an effective way for higher education to c...Innovation and entrepreneurship education is an important part of higher education.It adapts to the current era background of mass innovation and entrepreneurship,and is also an effective way for higher education to cultivate all-round developing talents.From the perspective of current higher education,many colleges and universities attach importance to basic education,but their cultivation of students’innovation and entrepreneurship abilities is relatively insufficient;some colleges and universities have a relatively superficial understanding of innovation and entrepreneurship,showing the characteristics of emphasizing theory over practice,and the teaching reform is indeed ineffective.The teaching concept of integration of industry and education emphasizes that enterprises are an important subject in talent cultivation,injecting new vitality into the development of the innovation and entrepreneurship curriculum system for water conservancy majors in colleges and universities.Against this background,guided by the teaching concept of integration of industry and education,this paper explores the important role of strengthening innovation and entrepreneurship education for water conservancy majors,and then deeply explores corresponding teaching strategies,aiming to improve the quality of innovation education for water conservancy students,cultivate their good innovation awareness and entrepreneurship ability,enhance their comprehensive quality,and deliver all-round developing water conservancy talents.展开更多
Nature education program is an essential teaching content in kindergarten,which is not only conducive to enhancing children’s knowledge of the natural environment and awareness of protection but also cultivating thei...Nature education program is an essential teaching content in kindergarten,which is not only conducive to enhancing children’s knowledge of the natural environment and awareness of protection but also cultivating their exploratory ability.As the future practitioners of kindergarten education,preschool education majors in colleges and universities are now actively exploring the implementation strategies of kindergarten nature education programs and innovating the construction method of nature education programs,which not only directly affects the high quality of their future teaching work,but also helps to promote the cognitive development of young children and the enhancement of their practical skills.Based on this,this paper outlines the teaching strategies of a kindergarten nature education program from the perspective of letting young children get close to nature,discovering nature,and other aspects of preschool education majors in colleges and universities.展开更多
In the context of modern holistic education,integrating“ideological and political education”into specialized courses is a new requirement for professional teaching.In order to seamlessly integrate ideological educat...In the context of modern holistic education,integrating“ideological and political education”into specialized courses is a new requirement for professional teaching.In order to seamlessly integrate ideological education into academic disciplines through subtle influence,it is essential to identify and design suitable ideological elements.Based on the interdisciplinary nature of chemical engineering curricula,this paper focuses on core socialist values,patriotic sentiment,professional ethics,and the spirit of scientific innovation.It identifies key ideological elements such as“a strong chemical industry makes a strong nation”and“patriotism and maritime power,”analyzes their manifestations of value,and explores their relevance and significance in ideological education across different chemical engineering courses.展开更多
Purpose:To contribute to the study of networks and graphs.Design/methodology/approach:We apply standard mathematical thinking.Findings:We show that the distance distribution in an undirected network Lorenz majorizes t...Purpose:To contribute to the study of networks and graphs.Design/methodology/approach:We apply standard mathematical thinking.Findings:We show that the distance distribution in an undirected network Lorenz majorizes the one of a chain.As a consequence,the average and median distances in any such network are smaller than or equal to those of a chain.Research limitations:We restricted our investigations to undirected,unweighted networks.Practical implications:We are convinced that these results are useful in the study of small worlds and the so-called six degrees of separation property.Originality/value:To the best of our knowledge our research contains new network results,especially those related to frequencies of distances.展开更多
In addition to conventional antenna-based array,the reconfigurable intelligent surface(RIS)holds promise as an alternative technology for manufacturing massive multi-input multi-output(MIMO)array for beyond 5G communi...In addition to conventional antenna-based array,the reconfigurable intelligent surface(RIS)holds promise as an alternative technology for manufacturing massive multi-input multi-output(MIMO)array for beyond 5G communications.This paper designs a fast algorithm to optimize the RIS-based MIMO precoder for maximizing the spectral efficiency,which includes the digital precoder and the RIS reflection phases.We evaluate the optimality of the algorithm by deriving an RIS channel capacity upper bound utilizing majorization theory.Our scheme can work for an RIS in both frequency flat and frequency selective channels,with either continuously or discretely tunable phases.The simulation results show that the proposed algorithm can achieve the capacity upper bound in some scenarios,which empirically proves its optimality.It is also shown that our algorithm is one-to-two orders of magnitude faster than the state-of-the-art methods in the literature.展开更多
Let G be a graph on n vertices whose degree sequence is d_(1)≥…≥d_(n).For a positive integer p,the degree power of G is defined by e_p(G)=∑_(i=1)^(n) d_(i)^(p).In this paper,by majorization,we prove that for a min...Let G be a graph on n vertices whose degree sequence is d_(1)≥…≥d_(n).For a positive integer p,the degree power of G is defined by e_p(G)=∑_(i=1)^(n) d_(i)^(p).In this paper,by majorization,we prove that for a minimally k-connected graph G of order n≥4k,it always holds e_(2)(G)≤kn(n-k)and the extremal graph is K_(k,n-k).Furthermore,we respectively determine the maximum degree powers among all minimally 2(3)-connected graphs and minimally 2-edgeconnected graphs,whose extremal graphs are also characterized.展开更多
In China,English teachers usually take a three-step approach to grammar teaching,namely,the presentation—practice—production principle(3P Principle).This method consists of both“morphology”and“syntax.”It adopts ...In China,English teachers usually take a three-step approach to grammar teaching,namely,the presentation—practice—production principle(3P Principle).This method consists of both“morphology”and“syntax.”It adopts the traditional mode of grammar teaching,including knowledge presentation,grammar exercises,and grammatical competence production,which will inevitably lead to time consumption and low efficiency in grammar learning.This study is about cultivating English majors'grammatical competence through the theoretical mode of grammar teaching.The research results show that the theoretical mode of grammar teaching helps cultivate learners'grammatical competence.展开更多
Chinese non-English majors are a large group of English learners.In the process of English pronunciation acquisition,issues such as incomplete phonological knowledge,transfer of mother tongue,and overgeneralization,le...Chinese non-English majors are a large group of English learners.In the process of English pronunciation acquisition,issues such as incomplete phonological knowledge,transfer of mother tongue,and overgeneralization,lead to confusion of phonemes and stress,misunderstanding of syllable structure,and errors of assimilation,drop,and epenthesis.The accuracy of English pronunciation can only be improved by knowing both English and Chinese phonological systems,strengthening the teaching of English phonological knowledge,and adopting various phonological training activities.展开更多
To understand the current situation of institutional registration in Shaanxi Province after the implementation ofregistration system management in drug clinical trial institutions.Relevant information was collected on...To understand the current situation of institutional registration in Shaanxi Province after the implementation ofregistration system management in drug clinical trial institutions.Relevant information was collected on the“Announcement on the Accreditation of Drug Clinical Trial Institutions”issued by the National Medical Products Administration from 2005 to August 2022,the record management information system of drug and medical device clinical trial institutions,and the drug clinical trial registration and information publicity platform.A retrospective analysis was carried out in terms of institutional development,regional distribution,registered majors,principal investigators,and the number of drug clinical trials.After the implementation of institution registration,the number of drug clinical trial institutions in Shaanxi Province increased by 47.4%,884 principal investigators were registered,the number of registered majors expanded from 58 qualified to 117,and the professional scope increased by 50.4%.The policy of institution registration is conducive to promoting the rational use of medical resources and the development of drug clinical trial institutions and improving the healthy development of the pharmaceutical industry in Shaanxi Province.展开更多
The“Double Reduction”policy has been implemented for more than three years,and the 5+2 Model has also been fully implemented for one year.Changes in education policies inevitably affect undergraduate majors related ...The“Double Reduction”policy has been implemented for more than three years,and the 5+2 Model has also been fully implemented for one year.Changes in education policies inevitably affect undergraduate majors related to primary school education in normal universities because the new education policies have put forward higher requirements for prospective English teachers on how to integrate into primary school teaching,research,management and other work more quickly.This paper,based on the Theory of Constructivism,explores innovative practical teaching model for English education majors from two dimensions:integration and immersion.By integrating professional skills courses,knowledge courses,and comprehensive training courses,this practical teaching model aims to achieve integrated development of English education majors by linking in-class and after-class,on-line and off-line,on-campus and off-campus resources.Project-based management and circular progression measures are adopted to cultivate students’practical and innovative abilities.展开更多
The study adopts Byram’s Intercultural Communicative Competence(ICC)model as the theoretical framework,and structured interviews were conducted to explore the impact of street interviews on the participants’ICC.Anal...The study adopts Byram’s Intercultural Communicative Competence(ICC)model as the theoretical framework,and structured interviews were conducted to explore the impact of street interviews on the participants’ICC.Analysis results revealed street interviews help students acquire knowledge in intercultural attitudes,intercultural knowledge,skills of discovery and interaction,and critical cultural awareness,aligning with the four components of Byram’s ICC model.Meanwhile,they have positive perceptions of street interviews.Therefore,street interviews have a positive effect on the development of participants’ICC.展开更多
This article studies the existence of analytic invariant curves for a nonlinear second order difference equation which was modeled from macroeconomics of the business cycle. The author not only discusses the case of t...This article studies the existence of analytic invariant curves for a nonlinear second order difference equation which was modeled from macroeconomics of the business cycle. The author not only discusses the case of the eigenvalue off the unit circle S^1 and the case on S^1 with the Diophantine condition but also considers the case of the eigenvalue at a root of the unity, which obviously violates the Diophantine condition.展开更多
We study the local analytic solutions f of the functional equation f（ψ（zf（z））） = φ（f（z）） for z in some neighborhood of the origin. Whether the solution f vanishes at z = 0 or not plays a critical role for ...We study the local analytic solutions f of the functional equation f（ψ（zf（z））） = φ（f（z）） for z in some neighborhood of the origin. Whether the solution f vanishes at z = 0 or not plays a critical role for local analytic solutions of this equation. In this paper, we obtain results of analytic solutions not only in the case f（0） = 0 but also for f（0） ≠ 0. When assuming f（0） = 0, for technical reasons, we just get the result for f′（0）≠ 0. Then when assuming f（0） = ω0 ≠ 0, ψ（0） = s # 0, ψ（z） is analytic at z = 0 and ψ（z） is analytic at z = ω0, we give the existence of local analytic solutions f in the case of 0 〈 ｜sω0｜ 〈 1 and the case of ｜sω0｜ = 1 with the Brjuno condition.展开更多
基金The 2023 Qingdao Institute of Technology Campus-Level Teaching and Research Project“Research on Project-Based Teaching Model for Engineering Majors in Colleges and Universities”(2023JY005)。
文摘Based on the study of the Mechanical Design and Automation major and its relevance to teaching reform in higher education engineering programs,a project-based teaching model was introduced.This approach integrates teaching design,scheme argumentation,and the implementation of teaching activities with the project serving as the central framework.Course knowledge points are derived from the project topics,forming the foundation for a structured knowledge framework.The course content is modularized in alignment with the project design,enabling students to engage with professional courses on a module-by-module basis,guided by the project.Each course utilizes the project topic as a practical case,facilitating project-led teaching.A teaching system tailored to the research project is proposed,establishing a professional course structure closely linked to the project objectives.
文摘This paper mainly discusses the innovative teaching mode of translation for English Majors under the guidance of OBE education philosophy.Firstly,by analyzing the current situation of translation teaching for English majors,this paper points out the main problems,and combined with the OBE education concept,through optimizing the top-level design,updating the teaching content,improving the teaching methods,and scientifically using the evaluation methods,constructs a student-centered and outcome-oriented teaching mode.It is hoped that this study can improve students’translation ability and comprehensive quality,and provide a useful reference for the reform of translation teaching for English majors.
基金supported in part by the Natural Science Foundation of China (62171110,U19B2028 and U20B2070)。
文摘Recently,the Fog-Radio Access Network(F-RAN)has gained considerable attention,because of its flexible architecture that allows rapid response to user requirements.In this paper,computational offloading in F-RAN is considered,where multiple User Equipments(UEs)offload their computational tasks to the F-RAN through fog nodes.Each UE can select one of the fog nodes to offload its task,and each fog node may serve multiple UEs.The tasks are computed by the fog nodes or further offloaded to the cloud via a capacity-limited fronhaul link.In order to compute all UEs'tasks quickly,joint optimization of UE-Fog association,radio and computation resources of F-RAN is proposed to minimize the maximum latency of all UEs.This min-max problem is formulated as a Mixed Integer Nonlinear Program(MINP).To tackle it,first,MINP is reformulated as a continuous optimization problem,and then the Majorization Minimization(MM)method is used to find a solution.The MM approach that we develop is unconventional in that each MM subproblem is solved inexactly with the same provable convergence guarantee as the exact MM,thereby reducing the complexity of MM iteration.In addition,a cooperative offloading model is considered,where the fog nodes compress-and-forward their received signals to the cloud.Under this model,a similar min-max latency optimization problem is formulated and tackled by the inexact MM.Simulation results show that the proposed algorithms outperform some offloading strategies,and that the cooperative offloading can exploit transmission diversity better than noncooperative offloading to achieve better latency performance.
文摘Against the backdrop of the high-quality development of vocational education,the construction of“double-qualified”teacher teams has shifted from focusing on quantity growth to emphasizing the improvement of“double-qualified”competencies.How to strengthen the quality-oriented construction of“double-qualified”teacher teams,give full play to the role of“double-qualified”teachers,promote the construction and teaching reform of tourism majors,and enhance the quality of tourism talent cultivation have become key issues faced by higher vocational tourism majors.Taking higher vocational tourism majors as an example,this paper analyzes the problems encountered in the construction of tourism-related“double-qualified”teacher teams,puts forward strategies for such construction,and explores the impact of building“double-qualified”teacher teams on the quality of talent cultivation in tourism majors.It aims to provide references for the coordinated improvement of the construction of“double-qualified”teacher teams and the quality of talent cultivation in higher vocational tourism majors.
文摘With the in-depth advancement of vocational education reform,the concept of“Mass Entrepreneurship and Innovation”has emerged at the historic moment.Integrating“Mass Entrepreneurship and Innovation”education into the teaching of computer-related professional courses in vocational schools is conducive to cultivating high-quality applied talents.Based on this,this paper deeply analyzes the connotation and characteristics of“Mass Entrepreneurship and Innovation”education,and examines the current status and existing problems of integrating such education into computer-related professional courses.Furthermore,it proposes optimization strategies from aspects including the formulation of course objectives,the reconstruction of teaching content,the innovation of teaching methods,the development of teaching staff,and the construction of practical platforms.The purpose is to enhance students’innovative thinking,entrepreneurial capabilities,and professional skills,and to provide professional talents with“Mass Entrepreneurship and Innovation”literacy for the development of the computer industry.
基金Education Teaching Reform Research and Practice Project of Tangshan Normal University“Research on the Construction and Practical Pathways of‘Foreign Languages+Majors’Interdisciplinary Model under the Background of New Liberal Arts”(2025JGZD114)。
文摘The construction of new liberal arts emphasizes interdisciplinary integration and the cultivation of compound talents,providing new opportunities for the collaborative development of foreign language majors and tourism majors in universities.The“foreign language+tourism”teaching model,by integrating the instrumental nature of language and the applied nature of tourism,aims to cultivate compound talents with both cross-cultural communication skills and practical capabilities in the tourism industry.Based on the background of new liberal arts,this paper analyzes the current status and challenges of“foreign language+tourism”teaching in universities,and proposes specific teaching paths from the dimensions of curriculum system reconstruction,teaching model innovation,faculty team optimization,and evaluation mechanism improvement,aiming to provide a theoretical reference for cultivating high-quality talents adapted to the high-quality development needs of the cultural and tourism industry.
基金Shihezi University Education and Teaching Reform Project(Project No.:JGY-2023-11)Shihezi University Teaching Achievement Award Cultivation Project。
文摘Innovation and entrepreneurship education is an important part of higher education.It adapts to the current era background of mass innovation and entrepreneurship,and is also an effective way for higher education to cultivate all-round developing talents.From the perspective of current higher education,many colleges and universities attach importance to basic education,but their cultivation of students’innovation and entrepreneurship abilities is relatively insufficient;some colleges and universities have a relatively superficial understanding of innovation and entrepreneurship,showing the characteristics of emphasizing theory over practice,and the teaching reform is indeed ineffective.The teaching concept of integration of industry and education emphasizes that enterprises are an important subject in talent cultivation,injecting new vitality into the development of the innovation and entrepreneurship curriculum system for water conservancy majors in colleges and universities.Against this background,guided by the teaching concept of integration of industry and education,this paper explores the important role of strengthening innovation and entrepreneurship education for water conservancy majors,and then deeply explores corresponding teaching strategies,aiming to improve the quality of innovation education for water conservancy students,cultivate their good innovation awareness and entrepreneurship ability,enhance their comprehensive quality,and deliver all-round developing water conservancy talents.
文摘Nature education program is an essential teaching content in kindergarten,which is not only conducive to enhancing children’s knowledge of the natural environment and awareness of protection but also cultivating their exploratory ability.As the future practitioners of kindergarten education,preschool education majors in colleges and universities are now actively exploring the implementation strategies of kindergarten nature education programs and innovating the construction method of nature education programs,which not only directly affects the high quality of their future teaching work,but also helps to promote the cognitive development of young children and the enhancement of their practical skills.Based on this,this paper outlines the teaching strategies of a kindergarten nature education program from the perspective of letting young children get close to nature,discovering nature,and other aspects of preschool education majors in colleges and universities.
基金Undergraduate Teaching Reform Research Project of Shenyang University of Technology。
文摘In the context of modern holistic education,integrating“ideological and political education”into specialized courses is a new requirement for professional teaching.In order to seamlessly integrate ideological education into academic disciplines through subtle influence,it is essential to identify and design suitable ideological elements.Based on the interdisciplinary nature of chemical engineering curricula,this paper focuses on core socialist values,patriotic sentiment,professional ethics,and the spirit of scientific innovation.It identifies key ideological elements such as“a strong chemical industry makes a strong nation”and“patriotism and maritime power,”analyzes their manifestations of value,and explores their relevance and significance in ideological education across different chemical engineering courses.
文摘Purpose:To contribute to the study of networks and graphs.Design/methodology/approach:We apply standard mathematical thinking.Findings:We show that the distance distribution in an undirected network Lorenz majorizes the one of a chain.As a consequence,the average and median distances in any such network are smaller than or equal to those of a chain.Research limitations:We restricted our investigations to undirected,unweighted networks.Practical implications:We are convinced that these results are useful in the study of small worlds and the so-called six degrees of separation property.Originality/value:To the best of our knowledge our research contains new network results,especially those related to frequencies of distances.
基金supported by National Natural Science Foundation of China Grant No.61771005。
文摘In addition to conventional antenna-based array,the reconfigurable intelligent surface(RIS)holds promise as an alternative technology for manufacturing massive multi-input multi-output(MIMO)array for beyond 5G communications.This paper designs a fast algorithm to optimize the RIS-based MIMO precoder for maximizing the spectral efficiency,which includes the digital precoder and the RIS reflection phases.We evaluate the optimality of the algorithm by deriving an RIS channel capacity upper bound utilizing majorization theory.Our scheme can work for an RIS in both frequency flat and frequency selective channels,with either continuously or discretely tunable phases.The simulation results show that the proposed algorithm can achieve the capacity upper bound in some scenarios,which empirically proves its optimality.It is also shown that our algorithm is one-to-two orders of magnitude faster than the state-of-the-art methods in the literature.
基金Supported by NSFC(No.12011530064)Natural Science Foundation of Shanghai(No.22ZR1416300)。
文摘Let G be a graph on n vertices whose degree sequence is d_(1)≥…≥d_(n).For a positive integer p,the degree power of G is defined by e_p(G)=∑_(i=1)^(n) d_(i)^(p).In this paper,by majorization,we prove that for a minimally k-connected graph G of order n≥4k,it always holds e_(2)(G)≤kn(n-k)and the extremal graph is K_(k,n-k).Furthermore,we respectively determine the maximum degree powers among all minimally 2(3)-connected graphs and minimally 2-edgeconnected graphs,whose extremal graphs are also characterized.
基金funded by the 2022 Hunan Vocational Education Teaching Reform Research Project“Research on the Cultivation of Critical Thinking Ability for Business English Majors in Vocational Colleges Under the Concept of Curriculum Ideology and Politics (Project approval No.:ZJGB2022058)”the 2022 General Funded Project of Hunan Social Science Achievement Review Committee“Research on the Development and Diagnostic Evaluation of Critical Thinking Ability Scale for English Learners based on CSE (Project approval No.:XSP22YBZ086).”。
文摘In China,English teachers usually take a three-step approach to grammar teaching,namely,the presentation—practice—production principle(3P Principle).This method consists of both“morphology”and“syntax.”It adopts the traditional mode of grammar teaching,including knowledge presentation,grammar exercises,and grammatical competence production,which will inevitably lead to time consumption and low efficiency in grammar learning.This study is about cultivating English majors'grammatical competence through the theoretical mode of grammar teaching.The research results show that the theoretical mode of grammar teaching helps cultivate learners'grammatical competence.
文摘Chinese non-English majors are a large group of English learners.In the process of English pronunciation acquisition,issues such as incomplete phonological knowledge,transfer of mother tongue,and overgeneralization,lead to confusion of phonemes and stress,misunderstanding of syllable structure,and errors of assimilation,drop,and epenthesis.The accuracy of English pronunciation can only be improved by knowing both English and Chinese phonological systems,strengthening the teaching of English phonological knowledge,and adopting various phonological training activities.
基金Project of Xi’an Science and Technology Plan(23YXYJ0163)Education and Teaching Reform Research Project of Xi’an Medical University in 2023(S202311840061)+1 种基金First Affiliated Hospital of Xi’an Medical University of China(XYYFY-2023-01)2021 Xi’an Medical University University-Level Science and Technology Innovation Team(2021TD14)。
文摘To understand the current situation of institutional registration in Shaanxi Province after the implementation ofregistration system management in drug clinical trial institutions.Relevant information was collected on the“Announcement on the Accreditation of Drug Clinical Trial Institutions”issued by the National Medical Products Administration from 2005 to August 2022,the record management information system of drug and medical device clinical trial institutions,and the drug clinical trial registration and information publicity platform.A retrospective analysis was carried out in terms of institutional development,regional distribution,registered majors,principal investigators,and the number of drug clinical trials.After the implementation of institution registration,the number of drug clinical trial institutions in Shaanxi Province increased by 47.4%,884 principal investigators were registered,the number of registered majors expanded from 58 qualified to 117,and the professional scope increased by 50.4%.The policy of institution registration is conducive to promoting the rational use of medical resources and the development of drug clinical trial institutions and improving the healthy development of the pharmaceutical industry in Shaanxi Province.
文摘The“Double Reduction”policy has been implemented for more than three years,and the 5+2 Model has also been fully implemented for one year.Changes in education policies inevitably affect undergraduate majors related to primary school education in normal universities because the new education policies have put forward higher requirements for prospective English teachers on how to integrate into primary school teaching,research,management and other work more quickly.This paper,based on the Theory of Constructivism,explores innovative practical teaching model for English education majors from two dimensions:integration and immersion.By integrating professional skills courses,knowledge courses,and comprehensive training courses,this practical teaching model aims to achieve integrated development of English education majors by linking in-class and after-class,on-line and off-line,on-campus and off-campus resources.Project-based management and circular progression measures are adopted to cultivate students’practical and innovative abilities.
文摘The study adopts Byram’s Intercultural Communicative Competence(ICC)model as the theoretical framework,and structured interviews were conducted to explore the impact of street interviews on the participants’ICC.Analysis results revealed street interviews help students acquire knowledge in intercultural attitudes,intercultural knowledge,skills of discovery and interaction,and critical cultural awareness,aligning with the four components of Byram’s ICC model.Meanwhile,they have positive perceptions of street interviews.Therefore,street interviews have a positive effect on the development of participants’ICC.
基金supported by the Fund of Educational Reform Project of Guangxi Province of China (200710961)the Scientific Research Foundation of the Education Department of Guangxi Province of China (200707MS112)+1 种基金the Natural Science Fund of Hechi University (2006N001)the fund of Key discipline of applied mathematics of Hechi University (200725)
文摘This article studies the existence of analytic invariant curves for a nonlinear second order difference equation which was modeled from macroeconomics of the business cycle. The author not only discusses the case of the eigenvalue off the unit circle S^1 and the case on S^1 with the Diophantine condition but also considers the case of the eigenvalue at a root of the unity, which obviously violates the Diophantine condition.
基金supported by National Natural Science Foundation of China(11101295)
文摘We study the local analytic solutions f of the functional equation f（ψ（zf（z））） = φ（f（z）） for z in some neighborhood of the origin. Whether the solution f vanishes at z = 0 or not plays a critical role for local analytic solutions of this equation. In this paper, we obtain results of analytic solutions not only in the case f（0） = 0 but also for f（0） ≠ 0. When assuming f（0） = 0, for technical reasons, we just get the result for f′（0）≠ 0. Then when assuming f（0） = ω0 ≠ 0, ψ（0） = s # 0, ψ（z） is analytic at z = 0 and ψ（z） is analytic at z = ω0, we give the existence of local analytic solutions f in the case of 0 〈 ｜sω0｜ 〈 1 and the case of ｜sω0｜ = 1 with the Brjuno condition.
