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Classification of Multi-User Chirp Modulation Signals Using Wavelet Higher-Order-Statistics Features and Artificial Intelligence Techniques
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作者 Said E. El-Khamy Hend A. Elsayed 《International Journal of Communications, Network and System Sciences》 2012年第9期520-533,共14页
Higher order statistical features have been recently proved to be very efficient in the classification of wideband communications and radar signals with great accuracy. On the other hand, the denoising properties of t... Higher order statistical features have been recently proved to be very efficient in the classification of wideband communications and radar signals with great accuracy. On the other hand, the denoising properties of the wavelet transform make WT an efficient signal processing tool in noisy environments. A novel technique for the classification of multi-user chirp modulation signals is presented in this paper. A combination of the higher order moments and cumulants of the wavelet coefficients as well as the peaks of the bispectrum and its bi-frequencies are proposed as effective features. Different types of artificial intelligence based classifiers and clustering techniques are used to identify the chirp signals of the different users. In particular, neural networks (NN), maximum likelihood (ML), k-nearest neighbor (KNN) and support vector machine (SVMs) classifiers as well as fuzzy c-means (FCM) and fuzzy k-means (FKM) clustering techniques are tested. The Simulation results show that the proposed technique is able to efficiently classify the different chirp signals in additive white Gaussian noise (AWGN) channels with high accuracy. It is shown that the NN classifier outperforms other classifiers. Also, the simulations prove that the classification based on features extracted from wavelet transform results in more accurate results than that using features directly extracted from the chirp signals, especially at low values of signal-to-noise ratios. 展开更多
关键词 Artificial Intelligence TECHNIQUES CLASSIFICATION Discrete WAVELET Transform higher Order Statistics MULTI-USER CHIRP Modulation SIGNALS
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Do Higher Horizontal Resolution Models Perform Better?
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作者 Shoji KUSUNOKI 《Advances in Atmospheric Sciences》 2026年第1期259-262,共4页
Climate model prediction has been improved by enhancing model resolution as well as the implementation of sophisticated physical parameterization and refinement of data assimilation systems[section 6.1 in Wang et al.(... Climate model prediction has been improved by enhancing model resolution as well as the implementation of sophisticated physical parameterization and refinement of data assimilation systems[section 6.1 in Wang et al.(2025)].In relation to seasonal forecasting and climate projection in the East Asian summer monsoon season,proper simulation of the seasonal migration of rain bands by models is a challenging and limiting factor[section 7.1 in Wang et al.(2025)]. 展开更多
关键词 enhancing model resolution refinement data assimilation systems section climate model climate projection higher horizontal resolution seasonal forecasting simulation seasonal migration rain bands model resolution
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Performance of Order-statistics Constant-false-alarm-rate Detector with Noncoherent Integration and Its Application to OTH Radar
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作者 王威 赫兵 刘永坦 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1999年第1期73-77,共5页
Noncoherent integration is often ed for approving performance in detection of radar signal. Order-statistics constant false alarm rate (OS-CFAR) detector has some advantages in clutter and multiple target situations. ... Noncoherent integration is often ed for approving performance in detection of radar signal. Order-statistics constant false alarm rate (OS-CFAR) detector has some advantages in clutter and multiple target situations. AnOS-CFAN detector with noncoherent integration after Square law envelope detector is presented and an analysis of detection performance for the chi-Square family of Swerling fluctuating targets is given. Its application to the high frequency(HF) ground wave over-the-horizon (OTH) radar is discussed as well. 展开更多
关键词 NONCOHERENT integration order-statistics CONSTANT false ALARM RATE OVER-THE-HORIZON radar
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WELL-POSEDNESS AND PEAKON SOLUTIONS FOR A HIGHER ORDER CAMASSA-HOLM TYPE EQUATION
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作者 CHEN shuang 《数学杂志》 2025年第1期57-71,共15页
In this paper,we delve into a generalized higher order Camassa-Holm type equation,(or,an ghmCH equation for short).We establish local well-posedness for this equation under the condition that the initial data uo belon... In this paper,we delve into a generalized higher order Camassa-Holm type equation,(or,an ghmCH equation for short).We establish local well-posedness for this equation under the condition that the initial data uo belongs to the Sobolev space H'(R)for some s>2.In addition,we obtain the weak formulation of this equation and prove the existence of both single peakon solution and a multi-peakon dynamic system. 展开更多
关键词 Generalized higher order Camassa-Holm type equation Local well-posedness PEAKON
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Nonlinear Generalized Lie Triple Higher Derivation on Triangular Algebras by Local Actions
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作者 Mengya ZHANG Xinfeng LIANG Minghao WANG 《Journal of Mathematical Research with Applications》 2025年第5期603-628,共26页
Let R be a commutative ring with unity and T be a triangular algebra over R.Let a sequence G={G_n}_(n∈N)of nonlinear mappings G_n:T→T associated with nonlinear Lie triple higher derivations∆={δ_n}_(n∈N)by local ac... Let R be a commutative ring with unity and T be a triangular algebra over R.Let a sequence G={G_n}_(n∈N)of nonlinear mappings G_n:T→T associated with nonlinear Lie triple higher derivations∆={δ_n}_(n∈N)by local actions be a generalized Lie triple higher derivation by local actions satisfying Gn([[x,y],z])=Σ_(i+j+k=n)[[Gi(x),δj(y)],δk(z)]for all x,y,z∈T with xyz=0.Under some mild conditions on T,we prove in this paper that every nonlinear generalized Lie triple higher derivation by local actions on triangular algebras is proper.As an application we shall give a characterization of nonlinear generalized Lie triple higher derivations by local actions on upper triangular matrix algebras and nest algebras,respectively.At the same time,it also improves some interesting conclusions,such as[J.Algebra Appl.22(3),2023,Paper No.2350059],[Axioms,11,2022,1–16]. 展开更多
关键词 generalized Lie triple higher derivation Lie triple higher derivation faithful bimodule local action triangular algebra
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The Protection of Academic Freedom by Leadership in the Process of Higher Education Modernization
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作者 Wanru Zhao 《Journal of Contemporary Educational Research》 2025年第5期135-139,共5页
The essence of academic freedom lies in scholars’autonomy in the pursuit of knowledge,free from external coercion and internal constraints,encompassing various aspects such as freedom of research,teaching,and learnin... The essence of academic freedom lies in scholars’autonomy in the pursuit of knowledge,free from external coercion and internal constraints,encompassing various aspects such as freedom of research,teaching,and learning.Leadership plays a crucial role in safeguarding academic freedom.Drawing on Macfarlane’s conceptualization of intellectual leadership,this article examines faculty-based agency protection,as well as institutional,cultural,and resource-based protections at the university level. 展开更多
关键词 higher education LEADERSHIP Academic freedom
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Exploring a Hybrid Teaching Quality Evaluation System Based on the CIPP Model Construction in Higher Education
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作者 Lin Chen 《Journal of Contemporary Educational Research》 2025年第6期111-122,共12页
Hybrid teaching has become an essential direction of the teaching reform and innovation of higher education,and puts forward new requirements for the evaluation system of teaching quality.The background of hybrid teac... Hybrid teaching has become an essential direction of the teaching reform and innovation of higher education,and puts forward new requirements for the evaluation system of teaching quality.The background of hybrid teaching,the CIPP model,and teaching quality evaluation system,and the necessity of constructing a hybrid teaching quality evaluation system are further discussed.This paper also discusses the evaluation focus of the CIPP model and its applicability in the hybrid teaching quality evaluation and believes that the CIPP model can reflect the concept innovation,target diversity,process advancement,and subject participation;the evaluation indicator system of hybrid teaching quality is designed based on the CIPP model,which provides a reference for the hybrid teaching quality evaluation and teaching reform. 展开更多
关键词 Hybrid teaching Evaluation CIPP higher education QUALITY
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Digitalization Empowers Higher Education Teaching Management-Reform and Innovation,Shaping and Transformation,Role and Inspiration,Challenges and Countermeasures
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作者 Ce Zhang Peng Liu +2 位作者 Xiaoying Liu Meng Wei Xuejie Zhao 《计算机教育》 2025年第3期10-23,共14页
The combination and application of information technology and higher education have led to changes in the form and mode of teaching management in higher education,promoting the continuous deepening of digital transfor... The combination and application of information technology and higher education have led to changes in the form and mode of teaching management in higher education,promoting the continuous deepening of digital transformation in higher education.This paper discusses higher education management innovation triggered by digital technology and the new appearance of digital university governance,digital evaluation management,and internal governance of higher education.From the perspective of forging new forms,models,and paths of digital management through digital technology,this paper focuses on analyzing the reshaping of management systems by digitalization in higher education.The promotion and inspiration of digitalization on management system reform are provided,including typical features brought about,new paths opened up,and new advantages shaped.It is emphasized that the establishment of digital management system needs to rely on the systematic integration of multiple aspects.Finally,the challenges and solutions faced by the digital management system are deeply analyzed from the aspects of collaborative management and services,management process interoperability,evaluation and trust protection,and personnel digital literacy.Digital technology drives the transformation of higher education management system,resulting in new forms,models,paths,and methods of networked and digital management based on intelligent analysis and processing of educational and teaching data and promoting higher education management toward digital governance.The comprehensive establishment of a digital management system will unleash strong potential for universities to better fulfill their functions,and the high-quality development of higher education will be more solid and powerful. 展开更多
关键词 higher education Digital transformation Management system Digital management
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Extensions and Deformations of 3-Lie Algebras with Higher Derivations
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作者 Shuangjian GUO 《Journal of Mathematical Research with Applications》 2025年第1期20-32,共13页
In this paper,we call a tuple consisting of 3-Lie algebra and a higher derivation on it a 3-LieHDer pair.We introduce a cohomology theory of 3-LieHDer pairs.Next,we interpret the second cohomology group as the space o... In this paper,we call a tuple consisting of 3-Lie algebra and a higher derivation on it a 3-LieHDer pair.We introduce a cohomology theory of 3-LieHDer pairs.Next,we interpret the second cohomology group as the space of all isomorphism classes of abelian extensions.Finally,we consider formal deformations of 3-LieHDer pairs that are governed by the cohomology with self-coefficient. 展开更多
关键词 higher derivations 3-LieHDer pairs COHOMOLOGY EXTENSIONS formal deformations
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Research on the Advantages,Shortcomings,and Countermeasures of Current Higher TCM Education
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作者 Heguo Yan Niqing Xiao +7 位作者 Sanjin Zeng Bo Yang Bingbing Chen He Qian Xiaoyu Zhang Zhaohu Xie Jing Xie Zhaofu Li 《Journal of Contemporary Educational Research》 2025年第5期107-114,共8页
Traditional Chinese Medicine(TCM)is a treasure of China’s traditional medical heritage,embodying the wisdom and cultural depth of the Chinese nation.Higher TCM education shoulders the important responsibility of pres... Traditional Chinese Medicine(TCM)is a treasure of China’s traditional medical heritage,embodying the wisdom and cultural depth of the Chinese nation.Higher TCM education shoulders the important responsibility of preserving and advancing TCM,and in today’s context,it offers significant advantages while also facing numerous challenges.Among its strengths are a profound cultural foundation in TCM,utilizing classic texts and unique theories to cultivate students’TCM thinking and competence;diversified teaching methods that integrate knowledge from multiple disciplines,innovate instructional models,and combine traditional with modern educational approaches;a complete teaching system characterized by professional faculty and advanced facilities;and interdisciplinary integration fostering innovation.However,problems persist,including some students lacking confidence in TCM culture due to the influence of Western medicine concepts and the westernization of the educational model;weak practical teaching where theory dominates,practice time is limited,and there are insufficient bases and instructors;and a shortage of faculty resulting in an imbalanced student-to-teacher ratio and an unreasonable structure.To address these issues,it is recommended to enhance cultural confidence,strengthen faculty development,and optimize practical teaching,thereby promoting the sustainable development of higher TCM education and achieving the shared prosperity of TCM education and the TCM profession. 展开更多
关键词 higher TCM education Advantages SHORTCOMINGS STRATEGIES RESEARCH
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Current Situation,Challenges,and Countermeasures for the Development of Higher Education in Heilongjiang Province
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作者 Chuanli Wei Yuhan Ma 《Journal of Contemporary Educational Research》 2025年第7期389-399,共11页
High-quality development of higher education is the key to high-quality economic and social development in Heilongjiang Province.Strong education is a strategic project for the development of a high-quality population... High-quality development of higher education is the key to high-quality economic and social development in Heilongjiang Province.Strong education is a strategic project for the development of a high-quality population,and high-quality education is the key to improving the overall quality of the population.The current northeastern region is in a critical period of comprehensive revitalization,there is an urgent need for education,science and technology,and human resources to provide a trinity of all-round,multi-factor support.It is essential for colleges and universities in Northeast China to consolidate their strengths,apply targeted efforts,and serve the Party and the state by playing a renewed and more prominent role within the broader strategic context.In light of the comprehensive revitalization of the Northeast,identifying the challenges facing higher education in Heilongjiang Province and proposing appropriate development pathways has become a pressing and widely discussed issue in both academic and practical circles. 展开更多
关键词 higher education High-quality development Heilongjiang Province CHALLENGE COUNTERMEASURE
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Discussion on the Construction of Part-Time Teachers in Higher Vocational Colleges
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作者 Hong Ye Yuan Zhong Chunxi Yi 《Journal of Contemporary Educational Research》 2025年第1期44-48,共5页
High-quality professional teaching staff is an important guarantee to achieve high-quality sustainable development of higher vocational colleges.Part-time teachers are an essential part of the teaching staff of higher... High-quality professional teaching staff is an important guarantee to achieve high-quality sustainable development of higher vocational colleges.Part-time teachers are an essential part of the teaching staff of higher vocational colleges,playing a vital role in higher vocational education.This paper analyzes the problems existing in the management of part-time teachers in higher vocational colleges,such as irregular employment,lack of systematic training,imperfect teaching quality monitoring and evaluation system,weak incentive policy,high turnover,and poor stability.Combined with the characteristics of part-time teachers,this paper explores the construction strategy of parttime teachers in higher vocational colleges,builds a high-quality and high-level part-time teacher team,and provides references for achieving high-quality sustainable development of higher vocational colleges. 展开更多
关键词 higher vocational school Part-time teachers COUNTERMEASURES
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A Study on the Digital Transformation of Higher Education in Egypt
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作者 Gang Hu Ruonan Cao 《Journal of Contemporary Educational Research》 2025年第2期101-105,共5页
With the advancement of information technology,the digital transformation of higher education has become a global trend in educational reform.Egypt has propelled the modernization of its higher education system throug... With the advancement of information technology,the digital transformation of higher education has become a global trend in educational reform.Egypt has propelled the modernization of its higher education system through digital means,focusing on enhancing teachers’digital teaching capabilities,improving course quality,and establishing a policy environment that supports digital instruction.The driving forces behind Egypt’s transformation include meeting the demand for skilled talent due to economic reforms,participating in internationalization processes,and the impetus provided by public diplomacy.By introducing high-quality international resources,deepening scientific research collaboration,and applying digital technologies,Egypt has effectively alleviated issues of resource insufficiency and uneven development,thereby enhancing its capacity for higher education quality assurance.Egypt’s practice demonstrates that digitalization is a key pathway for developing countries to improve the quality of higher education,providing valuable insights for constructing sustainable models of higher education development. 展开更多
关键词 higher education Public diplomacy Digital transformation
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Arbitrary Positioning Higher-Order Topological Boundary States in Fe Breathing-Kagome Lattices on Ag(111)
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作者 Rui-Ge Yan Zhuo-Xing Zhang +8 位作者 Tong-Zhou Ji Wen-Lin Fan Hao-Tian Li Liang Sun Bing-Feng Miao Gong Chen Rui Wang Bai-Geng Wang Hai-Feng Ding 《Chinese Physics Letters》 2025年第8期242-263,共22页
Higher-order topological insulators,which host topologically protected states at boundaries that are at least two dimensions lower than the bulk,are an emerging class of topological materials.They provide great opport... Higher-order topological insulators,which host topologically protected states at boundaries that are at least two dimensions lower than the bulk,are an emerging class of topological materials.They provide great opportunities for exploring novel topological phenomena and fascinating applications.Utilizing a low-temperature scanning tunneling microscope,we construct breathing-kagome lattices with Fe adatoms on Ag(111)and investigate their electronic properties.We observe the higher-order topological boundary states in the topological phase but not in the trivial one,which is consistent with the theory.These states are found to be robust against the removal of bulk or edge adatoms.Further,we show the arbitrary positioning of these states either at corner,edge,or bulk sites by slightly modifying their neighbors.Our study not only demonstrates the formation and robustness of the electronic higher-order topological boundary states in real atomic systems but also provides a route for controlling their positions. 展开更多
关键词 arbitrary positioning higher order topological boundary states Ag topological materialsthey Fe breathing kagome lattices higher order topological insulators fe adatoms topologically protected states
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Psychological education in higher education: Opportunities and challenges in the Internet+ era
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作者 Hong-Ying Zhang Yang Yu 《World Journal of Psychiatry》 2025年第5期20-26,共7页
In the context of"Internet+,"the rapid development and integration of infor-mation technology in China have brought new opportunities and challenges to psychological education in higher education.Compared wi... In the context of"Internet+,"the rapid development and integration of infor-mation technology in China have brought new opportunities and challenges to psychological education in higher education.Compared with traditional psycho-logical education,the high information throughput and multichannel presentation of"Internet+"have altered students’cognitive characteristics.Consequently,traditional psychological education methods are no longer suitable for the current environment,and education methods pose new challenges for higher education.New media technologies within the"Internet+"framework have played a crucial role in psychological education.Further research is needed to explore new applic-ations for enhancing the quality of psychological education in higher education institutions.This paper reviews the current opportunities and challenges faced by psychological education in the context of"Internet+",and explores a mechanism-driven,collaborative,and efficient educational strategy that is responsive to new conditions. 展开更多
关键词 Internet+ Psychological education higher education New media techno-logies Educational strategy
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Research on Innovation Paths of Higher Nursing Education in the Context of Smart Teaching
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作者 Yan Liu Wei Li Ruining Hu 《Journal of Contemporary Educational Research》 2025年第3期166-172,共7页
With the deep integration of digitization and intelligence,smart teaching has become an important trend in the field of education.As a key link in cultivating professional nursing talents,higher nursing education face... With the deep integration of digitization and intelligence,smart teaching has become an important trend in the field of education.As a key link in cultivating professional nursing talents,higher nursing education faces new opportunities and challenges in the context of smart teaching.This article deeply explores the necessity of innovating higher nursing education in the context of smart teaching,analyzes the current problems in higher nursing education,and proposes specific innovation paths from the aspects of teaching philosophy,teaching mode,teaching resources,teacher team building,and evaluation system.The aim is to improve the quality of higher nursing education and provide theoretical references for cultivating high-quality nursing talents that meet the needs of smart healthcare. 展开更多
关键词 Smart teaching higher nursing education Innovation path
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NONEXISTENCE AND EXISTENCE OF SUPERSOLUTIONS FOR HIGHER ORDER SEMILINEAR EQUATIONS IN EXTERIOR DOMAINS
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作者 Xianmei ZHOU 《Acta Mathematica Scientia》 2025年第5期1920-1941,共22页
In this paper,we study the weighted higher order semilinear equation in an exterior domain(-△)^(m)u=|x|^(α)g(u)in R^(N)\B_(R_(0)),where N≥1,m≥2 are integers,α>-2m,g is a continuous and nondecreasing function i... In this paper,we study the weighted higher order semilinear equation in an exterior domain(-△)^(m)u=|x|^(α)g(u)in R^(N)\B_(R_(0)),where N≥1,m≥2 are integers,α>-2m,g is a continuous and nondecreasing function in(0,+∞)and positive in(0,+∞),B_(R_(0))is the ball of the radius R0 centered at the origin.We prove that a positive supersolution of the problem which verifies(-△)_(i)u>0 in R^(N)\B_(R_(0))(i=0,…,m-1)exists if and only if N>2m and∫_(0)^(δ)g(t)/t^(2(N-m)+α/N-2m)dt<∞,,for someδ>0.We further obtain some existence and nonexistence results for the positive solution to the Dirichlet problem when g(u)=u^(p)with p>1,by using the Pohozaev identity and an embedding lemma of radial Sobolev spaces. 展开更多
关键词 higher order equations exterior domains Liouville theorem EXISTENCE super-solutions
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Propagation Path of Traditional Handicrafts in Higher Vocational Schools
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作者 ZHU Fufang 《Journal of Landscape Research》 2025年第1期43-46,53,共5页
Traditional handicrafts,as emblematic representations of cultural heritage,play a crucial role in advancing the cultural construction of schools,facilitating the presentation of traditional culture to contemporary stu... Traditional handicrafts,as emblematic representations of cultural heritage,play a crucial role in advancing the cultural construction of schools,facilitating the presentation of traditional culture to contemporary students in a revitalized manner.This study investigates the implementation path of traditional handicrafts in college development.It encompasses the incorporation of traditional handicrafts into schools,the establishment of a trinity model for cultural education,the formulation of a curriculum that emphasizes the distinctive features of local cultures,the creation of a platform for cultural practice,and the active promotion of school cultural construction.The objective is to foster the creative transformation and innovative advancement of China’s exceptional traditional culture among young students. 展开更多
关键词 Traditional handicraft Cultural construction higher vocational school Propagation path
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