期刊文献+
共找到43,148篇文章
< 1 2 250 >
每页显示 20 50 100
ESTIMATION OF AVERAGE DIFFERENTIAL ENTROPY FOR A STATIONARY ERGODIC SPACE-TIME RANDOM FIELD ON A BOUNDED AREA
1
作者 Zhanjie SONG Jiaxing ZHANG 《Acta Mathematica Scientia》 SCIE CSCD 2024年第5期1984-1996,共13页
In this paper,we mainly discuss a discrete estimation of the average differential entropy for a continuous time-stationary ergodic space-time random field.By estimating the probability value of a time-stationary rando... In this paper,we mainly discuss a discrete estimation of the average differential entropy for a continuous time-stationary ergodic space-time random field.By estimating the probability value of a time-stationary random field in a small range,we give an entropy estimation and obtain the average entropy estimation formula in a certain bounded space region.It can be proven that the estimation of the average differential entropy converges to the theoretical value with a probability of 1.In addition,we also conducted numerical experiments for different parameters to verify the convergence result obtained in the theoretical proofs. 展开更多
关键词 differential entropy STATIONARY ERGODICITY space-time random field time series
下载PDF
On the Praxis-Oriented Semiotic Aesthetics in Eastern European Marxism
2
作者 Li Huiwen 《Contemporary Social Sciences》 2024年第1期1-17,共17页
Eastern European Marxism,taking a critical stance towards structuralism,gave rise to a unique paradigm of praxis-oriented semiotic aesthetics.This novel approach posits that signs emerge from humans’social praxis and... Eastern European Marxism,taking a critical stance towards structuralism,gave rise to a unique paradigm of praxis-oriented semiotic aesthetics.This novel approach posits that signs emerge from humans’social praxis and also function as a means of praxis.It further delves into the principle governing the generation and usage of signs,i.e.,the Economy Principle,the homogenization of signs,the situatedness or contextual constraints,as well as their aesthetic features and transcendental attributes.As a result,the praxis-oriented semiotic aesthetics within Eastern European Marxism exhibits distinct theoretical value. 展开更多
关键词 Eastern European Marxism SEMIOTICS praxis aesthetics
下载PDF
Robust Space-Time Adaptive Track-Before-Detect Algorithm Based on Persymmetry and Symmetric Spectrum
3
作者 Xiaojing Su Da Xu +1 位作者 Dongsheng Zhu Zhixun Ma 《Journal of Beijing Institute of Technology》 EI CAS 2024年第1期65-74,共10页
Underwater monopulse space-time adaptive track-before-detect method,which combines space-time adaptive detector(STAD)and the track-before-detect algorithm based on dynamic programming(DP-TBD),denoted as STAD-DP-TBD,ca... Underwater monopulse space-time adaptive track-before-detect method,which combines space-time adaptive detector(STAD)and the track-before-detect algorithm based on dynamic programming(DP-TBD),denoted as STAD-DP-TBD,can effectively detect low-speed weak targets.However,due to the complexity and variability of the underwater environment,it is difficult to obtain sufficient secondary data,resulting in a serious decline in the detection and tracking performance,and leading to poor robustness of the algorithm.In this paper,based on the adaptive matched filter(AMF)test and the RAO test,underwater monopulse AMF-DP-TBD algorithm and RAO-DP-TBD algorithm which incorporate persymmetry and symmetric spectrum,denoted as PSAMF-DP-TBD and PS-RAO-DP-TBD,are proposed and compared with the AMF-DP-TBD algorithm and RAO-DP-TBD algorithm based on persymmetry array,denoted as P-AMF-DP-TBD and P-RAO-DP-TBD.The simulation results show that the four methods can work normally with sufficient secondary data and slightly insufficient secondary data,but when the secondary data is severely insufficient,the P-AMF-DP-TBD and P-RAO-DP-TBD algorithms has failed while the PSAMF-DP-TBD and PS-RAO-DP-TBD algorithms still have good detection and tracking capabilities. 展开更多
关键词 space-time adaptive detection track before detect ROBUSTNESS persymmetric property symmetric spectrum AMF test RAO test
下载PDF
The Study of “Imitation” Aesthetics in Ancient Painting Theory-Taking the Chinese and Western Sources as an Example
4
作者 HUO Jia-qi 《Journal of Literature and Art Studies》 2024年第2期138-143,共6页
The theory of“imitation”in painting occupies a leading position in western art,which originated from the theory of“imitation”in ancient Greece,and has become one of the art theories affecting the world through the... The theory of“imitation”in painting occupies a leading position in western art,which originated from the theory of“imitation”in ancient Greece,and has become one of the art theories affecting the world through the continuous development of later generations.Through the exploration of the source of“imitation”in China and the West,there are some comments on the meaning of“imitation”in Chinese classical painting theory,such as“transfer model writing”and“image form”,which is obvious differences from the west.Traditional Chinese painting is a combination of careful observation of natural things and subjective emotions to express their own aesthetic feelings,and ultimately form a vivid artistic conception.Modern imitation is borrowed from Western imitation.In fact,imitation in traditional painting has its own meaning,which contains Chinese aesthetic thought.“Imitation”aesthetics is unique in traditional Chinese painting and is the most important form of painting art. 展开更多
关键词 “imitation” aesthetics painting art
下载PDF
Curved Space-Time at the Planck Scale
5
作者 Lewis Nash 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2024年第1期167-179,共13页
This paper presents a physically plausible and somewhat illuminating first step in extending the fundamental principles of mechanical stress and strain to space-time. Here the geometry of space-time, encoded in the me... This paper presents a physically plausible and somewhat illuminating first step in extending the fundamental principles of mechanical stress and strain to space-time. Here the geometry of space-time, encoded in the metric tensor, is considered to be made up of a dynamic lattice of extremely small, localized fields that form a perfectly elastic Lorentz symmetric space-time at the global (macroscopic) scale. This theoretical model of space-time at the Planck scale leads to a somewhat surprising result in which matter waves in curved space-time radiate thermal gravitational energy, as well as an equally intriguing relationship for the anomalous dispersion of light in a gravitational field. 展开更多
关键词 Schwarzschild space-time Continuum Mechanics Planck Lattice Gravitational Radiation
下载PDF
Translation of Culture-loaded Words in The Golden Cangue under the Perspective of Reception Aesthetics
6
作者 YU Xuan 《Journal of Literature and Art Studies》 2024年第6期468-473,共6页
Good translations play a very important role in cultural exchange.The idea of reception aesthetics think the reader as the center in translation process.This paper will study the translation of culture-loaded words fr... Good translations play a very important role in cultural exchange.The idea of reception aesthetics think the reader as the center in translation process.This paper will study the translation of culture-loaded words from the perspective of reception aesthetics.It is divided into five parts.The first part mainly introduces the background and theoretical foundation of this paper,the second part introduces the writer’s works,the third part gives examples to analyze the culture-loaded words appearing in The Golden Cangue,the fourth part gives examples of the translation methods,and the fifth part is the conclusion.It aims to provide a reference for the English translation of culture-loaded words. 展开更多
关键词 Culture-loaded words Reception aesthetic The Golden Cangue Eileen Chang
下载PDF
Virtually coupled train set control subject to space-time separation:A distributed economic MPC approach with emergency braking configuration
7
作者 Xiaolin Luo Tao Tang +1 位作者 Le Wang Hongjie Liu 《High-Speed Railway》 2024年第3期143-152,共10页
The emerging virtual coupling technology aims to operate multiple train units in a Virtually Coupled Train Set(VCTS)at a minimal but safe distance.To guarantee collision avoidance,the safety distance should be calcula... The emerging virtual coupling technology aims to operate multiple train units in a Virtually Coupled Train Set(VCTS)at a minimal but safe distance.To guarantee collision avoidance,the safety distance should be calculated using the state-of-the-art space-time separation principle that separates the Emergency Braking(EB)trajectories of two successive units during the whole EB process.In this case,the minimal safety distance is usually numerically calculated without an analytic formulation.Thus,the constrained VCTS control problem is hard to address with space-time separation,which is still a gap in the existing literature.To solve this problem,we propose a Distributed Economic Model Predictive Control(DEMPC)approach with computation efficiency and theoretical guarantee.Specifically,to alleviate the computation burden,we transform implicit safety constraints into explicitly linear ones,such that the optimal control problem in DEMPC is a quadratic programming problem that can be solved efficiently.For theoretical analysis,sufficient conditions are derived to guarantee the recursive feasibility and stability of DEMPC,employing compatibility constraints,tube techniques and terminal ingredient tuning.Moreover,we extend our approach with globally optimal and distributed online EB configuration methods to shorten the minimal distance among VCTS.Finally,experimental results demonstrate the performance and advantages of the proposed approaches. 展开更多
关键词 Virtually coupled train set space-time separation Economic model predictive control Distributed model predictive control Emergency braking configuration
下载PDF
On Translation of Children’s Literature Based on Reception Aesthetics:A Case Study of The Secret Garden
8
作者 HOU Wen-lan LI Ju-yuan 《Journal of Literature and Art Studies》 2024年第3期194-200,共7页
Grounded in reader-centered theories,Reception Aesthetics prioritizes the active engagement and acceptance of target readers.This study examines the translation of children’s literature through the lens of Reception ... Grounded in reader-centered theories,Reception Aesthetics prioritizes the active engagement and acceptance of target readers.This study examines the translation of children’s literature through the lens of Reception Aesthetics,using Li Wenjun’s rendition of The Secret Garden as a case study.The objective is to scrutinize various aspects of the translation-including vocabulary,syntax,rhetorical devices,and cultural nuances-and to discern how the adaptation and application of diverse translation strategies cater to the aesthetic expectations. 展开更多
关键词 Reception aesthetics translation of children’s literature The Secret Garden
下载PDF
Research on the Cultivation of Aesthetics among Art Students under the New Era Background
9
作者 Yanmeng Fan Zhu Liu +2 位作者 Yong Guo Nan Li Zhiheng Guo 《Journal of Contemporary Educational Research》 2024年第10期69-74,共6页
Through understanding the history and current situation of aesthetic education in China,this paper explains some misunderstandings in the aesthetics of contemporary university art students,such as the insufficiency of... Through understanding the history and current situation of aesthetic education in China,this paper explains some misunderstandings in the aesthetics of contemporary university art students,such as the insufficiency of aesthetic value and ability,as well as the inadequacy of students’creativity due to traditional art education.It is also pointed out that the cultivation of core literacy of art students is a multidimensional and comprehensive process,and these problems need to be solved by schools,teachers,and students,so as to strengthen the inner aesthetic education of students and improve their aesthetic awareness and ability.Aesthetic education is not only an important part of the art classroom but also a key part of fostering students’all-round development and enhancing their humanistic literacy.It is necessary to cultivate students’observation,imagination,image-thinking ability,and creativity,so that they can become artistic talents with independent thinking and innovation. 展开更多
关键词 aesthetics Core literacy Art education CREATIVITY Talent cultivation
下载PDF
The Silent Curriculum:Classical Aesthetics as a Catalyst for Emotional and Social Skills in Higher Vocational Education
10
作者 Jingyi Duan Suhan Wu Min Luo 《Journal of Contemporary Educational Research》 2024年第10期139-147,共9页
This study examines the integration of classical aesthetics into the silent curriculum of higher vocational education,emphasizing its potential to significantly enhance emotional and social skills.Incorporating aesthe... This study examines the integration of classical aesthetics into the silent curriculum of higher vocational education,emphasizing its potential to significantly enhance emotional and social skills.Incorporating aesthetic principles into education emphasizes the importance of nurturing emotional intelligence,creativity,and cultural awareness in students-skills that go beyond the classroom and are essential for their growth,adaptability,and future careers.It explores theoretical foundations and practical implementations and addresses challenges such as the need for specialized educator training,overcoming institutional resistance,and securing adequate resources.Advocating for empirical research and strategic cultural partnerships,the paper proposes a transformative approach to vocational education,aligning it with contemporary societal and labor market demands,and underscores the vital role of classical aesthetics in enriching vocational training and enhancing student outcomes. 展开更多
关键词 Classical aesthetics Emotional intelligence Social skills Silent curriculum Vocational education
下载PDF
Research on the Path of Integrating Party Construction Aesthetics into Ideological and Political Education in Colleges and Universities
11
作者 LI Jun GU Gaofei +1 位作者 MENG Tian LIN Danyun 《Philosophy Study》 2024年第4期145-152,共8页
Party construction aesthetics is a valuable aesthetic resource formed in the practical exploration of rural revitalization,and it has logical compatibility with ideological and political education in terms of concepts... Party construction aesthetics is a valuable aesthetic resource formed in the practical exploration of rural revitalization,and it has logical compatibility with ideological and political education in terms of concepts,goals,tasks,etc.At present,comprehensive deepening reform has entered a deep-water zone,and some erroneous value orientations such as utilitarianism,emptiness,and liberalization are common in colleges and universities,and ideological and political education is caught in a new round of difficulties.As the main position of ideological and political education,colleges and universities should further use party construction aesthetics to strengthen and improve ideological and political education,adhere to the carrier of aesthetic education,carry out diversified integrated education,broaden the ideological and political practical teaching system,build a long-term mechanism for collaborative education of ideological and political education and party construction aesthetics,and fully integrate party construction aesthetics into ideological and political education in colleges and universities. 展开更多
关键词 party construction aesthetics ideological and political education integration path
下载PDF
The Past and Future of Aesthetics in Mathematics
12
作者 Xiaoyu Chen 《Journal of Contemporary Educational Research》 2024年第7期126-132,共7页
This paper explores the connotations of mathematical aesthetics and its connections with art,facilitated by collaboration with Ester,an individual with an artistic professional background.It begins by tracing the hist... This paper explores the connotations of mathematical aesthetics and its connections with art,facilitated by collaboration with Ester,an individual with an artistic professional background.It begins by tracing the historical evolution of aesthetics from the classical pursuit of authenticity to the modern shift toward self-expression in art.The discussion then highlights the similarities in the pursuit of truth between mathematics and art,despite their methodological differences.Through an analysis of aesthetic elements in mathematics,such as lines and function graphs,the article illustrates that the beauty of mathematics is not only manifested in cognitive processes but can also be intuitively expressed through visual arts.The paper further examines the influence of mathematics on the development of art,particularly how Leonardo da Vinci applied mathematical principles to his artworks.Additionally,the article addresses art students’perceptions of mathematics,proposes the customization of math courses for art students,and discusses future trends in the integration of mathematics and art,emphasizing the significance of art therapy and the altruistic direction of art.Lastly,the authors use a poster to visually convey the idea that the beauty of mathematics can be experienced through the senses. 展开更多
关键词 Mathematical aesthetics Integration of mathematics and art Applications of mathematics in art
下载PDF
Scalable transcoding for video transmission over space-time OFDM systems 被引量:2
13
作者 钱团结 孙军 +2 位作者 解蓉 苏鹏程 王嘉 《Journal of Southeast University(English Edition)》 EI CAS 2005年第4期405-410,共6页
A new scheme combining a scalable transcoder with space time block codes (STBC) for an orthogonal frequency division multiplexing (OFDM) system is proposed for robust video transmission in dispersive fading channe... A new scheme combining a scalable transcoder with space time block codes (STBC) for an orthogonal frequency division multiplexing (OFDM) system is proposed for robust video transmission in dispersive fading channels. The target application for such a scalable transcoder is to provide successful access to the pre-encoded high quality video MPEG-2 from mobile wireless terminals. In the scalable transcoder, besides outputting the MPEG-4 fine granular scalability (FGS) bitstream, both the size of video frames and the bit rate are reduced. And an array processing algorithm of layer interference suppression is used at the receiver which makes the system structure provide different levels of protection to different layers. Furthermore, by considering the important level of scalable bitstream, the different bitstreams can be given different level protection by the system structure and channel coding. With the proposed system, the concurrent large diversity gain characteristic of STBC and alleviation of the frequency-selective fading effect of OFDM can be achieved. The simulation results show that the proposed schemes integrating scalable transcoding can provide a basic quality of video transmission and outperform the conventional single layer transcoding transmitted under the random and bursty error channel conditions. 展开更多
关键词 scalable transcoding DOWN-SAMPLING space-time codes orthogonal frequency division multiplexing
下载PDF
The Translation of Children's Literature under the Guidance of Reception Aesthetics 被引量:2
14
作者 杜娟 《海外英语》 2015年第21期256-257,259,共3页
In recent years,a great majority of excellent foreign children' s literary works have sprung up in the domestic market,so the translation of children' literature are drawn much attention.However,the relevant s... In recent years,a great majority of excellent foreign children' s literary works have sprung up in the domestic market,so the translation of children' literature are drawn much attention.However,the relevant studies which guide the translation of children literature are quite few.Reception Aesthetics which take readers reception as a goal provides a new prospective for the translation of children s literature and promote its development. 展开更多
关键词 children’s literature translation of children’s literature Reception aesthetics DOMESTICATION FOREIGNIZATION
下载PDF
EM-based detection scheme for differential unitary space-time modulation
15
作者 杜正锋 陈杰 +1 位作者 潘文 高西奇 《Journal of Southeast University(English Edition)》 EI CAS 2007年第4期484-488,共5页
The performance loss of an approximately 3 dB signal-to-noise ratio is always paid with conventional differential detection compared to the related coherent detection. A new detection scheme consisting of two steps is... The performance loss of an approximately 3 dB signal-to-noise ratio is always paid with conventional differential detection compared to the related coherent detection. A new detection scheme consisting of two steps is proposed for the differential unitary space-time modulation (DUSTM) system. In the first step, the data sequence is estimated by conventional unitary space-time demodulation (DUSTD) and differentially encoded again to produce an initial estimate of the transmitted symbol stream. In the second step, the initial estimate of the symbol stream is utilized to initialize an expectation maximization (EM)-based iterative detector. In each iteration, the most recent detected symbol stream is employed to estimate the channel, which is then used to implement coherent sequence detection to refine the symbol stream. Simulation results show that the proposed detection scheme performs much better than the conventional DUSTD after several iterations. 展开更多
关键词 unitary space-time modulation differential detection expectation maximization (EM) algorithm
下载PDF
基于space-time的二叉树表示动态环境中的路径规划
16
作者 唐平 何卓华 杨宜民 《计算机工程》 CAS CSCD 北大核心 2002年第5期59-60,74,共3页
研究具有空间和时间的三维动态环境下的机器人路径规划分析了四叉树表示二维空间的搜索算法,在此基础上,提出采space-time,用二叉树表示二维空间的方法时间信息中增加加速度利用二叉树遍历方法和算法设计一个在动态障碍物环境下进行路... 研究具有空间和时间的三维动态环境下的机器人路径规划分析了四叉树表示二维空间的搜索算法,在此基础上,提出采space-time,用二叉树表示二维空间的方法时间信息中增加加速度利用二叉树遍历方法和算法设计一个在动态障碍物环境下进行路径规划的新算法并,,A*,,在足球机器人系统中进行仿真,实现了较好的路径规划。 展开更多
关键词 移动机器人 数据结构 space-time 二叉树 动态环境 路径规划
下载PDF
Traditional Chinese Aesthetics and Urban Landscape Design
17
作者 魏晶晶 王琳 《Journal of Landscape Research》 2010年第3期49-51,共3页
Landscape designs for modern urban open spaces are studied on the basis of traditional aesthetics, while aesthetic basis and development orientation can be provided for such designs through studies on traditional aest... Landscape designs for modern urban open spaces are studied on the basis of traditional aesthetics, while aesthetic basis and development orientation can be provided for such designs through studies on traditional aesthetics. It is hoped that landscape designs from aesthetic perspective can correct people’s aesthetic attitudes towards the city, transform their habitual aesthetic modes, so as to cultivate new aesthetic tastes. 展开更多
关键词 Traditional aesthetics Do-nothing INTROSPECTION LANDSCAPE
下载PDF
Gardening Aesthetics Implied in Yanshan Garden of Guilin City
18
作者 孟妍君 秦鹏 《Journal of Landscape Research》 2010年第9期68-71,88,共5页
Gardening aesthetics implied in Yanshan garden were analyzed by combining with its natural environment,Map of Yanshan Garden of Nong Daijin and relevant researches. This study stated that Confucianism,Taoism and Zen B... Gardening aesthetics implied in Yanshan garden were analyzed by combining with its natural environment,Map of Yanshan Garden of Nong Daijin and relevant researches. This study stated that Confucianism,Taoism and Zen Buddhism laid the philosophical foundation of gardening in Yanshan Garden and its gardening aesthetics included the ideas of entering or leaving the officialdom,painting style and artistic conception,beauty of natural landscape and cultural connotation of Fengshui. 展开更多
关键词 Yanshan GARDEN GARDENING aesthetics Ideas
下载PDF
Design of super-orthogonal space-time trellis codes based on trace criterion
19
作者 耿嘉 曹秀英 《Journal of Southeast University(English Edition)》 EI CAS 2006年第4期456-460,共5页
A design of super-orthogonal space-time trellis codes (SOSTTCs) based on the trace criterion (TC) is proposed for improving the design of SOSTTCs. The shortcomings of the rank and determinant criteria based design... A design of super-orthogonal space-time trellis codes (SOSTTCs) based on the trace criterion (TC) is proposed for improving the design of SOSTTCs. The shortcomings of the rank and determinant criteria based design and the advantages of the TC-based design are analyzed. The optimization principle of four factors is presented, which includes the space-time block coding (STBC) scheme, set partitioning, trellis structure, and the assignment of signal subsets and STBC schemes in the trellis. According to this principle, systematical and handcrafted design steps are given in detail. By constellation expansion, the code performance can be further improved. The code design results are given, and the new codes outperform others in the simulation. 展开更多
关键词 super-orthogonal space-time trellis codes trace criterion handcrafted and systematical design
下载PDF
Method of combining space-time block coding with adaptive beamforming
20
作者 沈克勤 《Journal of Southeast University(English Edition)》 EI CAS 2005年第3期254-259,共6页
A method of space-time block coding (STBC) system based on adaptive beamforming of cyclostationarity signal algorithm is proposed.The method uses cyclostationarity of signals to achieve adaptive beamforming,then con... A method of space-time block coding (STBC) system based on adaptive beamforming of cyclostationarity signal algorithm is proposed.The method uses cyclostationarity of signals to achieve adaptive beamforming,then constructs a pair of low correlated transmit beams based on beamform estimation of multiple component signals of uplink.Using these two selected transmit beams,signals encoded by STBC are transmitted to achieve diversity gain and beamforming gain at the same time,and increase the signal to noise ratio (SNR) of downlink.With simple computation and fast convergence performance,the proposed scheme is applicable for time division multiple access (TDMA) wireless communication operated in a complex interference environment.Simulation results show that the proposed scheme has better performance than conventional STBC,and can obtain a gain of about 5 dB when the bit error ratio (BER) is 10-4. 展开更多
关键词 space-time coding GAIN adaptive beamforming cyclostationary signal transmit diversity
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部