期刊文献+
共找到1,618篇文章
< 1 2 81 >
每页显示 20 50 100
IndRT-GCNets: Knowledge Reasoning with Independent Recurrent Temporal Graph Convolutional Representations
1
作者 Yajing Ma Gulila Altenbek Yingxia Yu 《Computers, Materials & Continua》 SCIE EI 2024年第1期695-712,共18页
Due to the structural dependencies among concurrent events in the knowledge graph and the substantial amount of sequential correlation information carried by temporally adjacent events,we propose an Independent Recurr... Due to the structural dependencies among concurrent events in the knowledge graph and the substantial amount of sequential correlation information carried by temporally adjacent events,we propose an Independent Recurrent Temporal Graph Convolution Networks(IndRT-GCNets)framework to efficiently and accurately capture event attribute information.The framework models the knowledge graph sequences to learn the evolutionary represen-tations of entities and relations within each period.Firstly,by utilizing the temporal graph convolution module in the evolutionary representation unit,the framework captures the structural dependency relationships within the knowledge graph in each period.Meanwhile,to achieve better event representation and establish effective correlations,an independent recurrent neural network is employed to implement auto-regressive modeling.Furthermore,static attributes of entities in the entity-relation events are constrained andmerged using a static graph constraint to obtain optimal entity representations.Finally,the evolution of entity and relation representations is utilized to predict events in the next subsequent step.On multiple real-world datasets such as Freebase13(FB13),Freebase 15k(FB15K),WordNet11(WN11),WordNet18(WN18),FB15K-237,WN18RR,YAGO3-10,and Nell-995,the results of multiple evaluation indicators show that our proposed IndRT-GCNets framework outperforms most existing models on knowledge reasoning tasks,which validates the effectiveness and robustness. 展开更多
关键词 Knowledge reasoning entity and relation representation structural dependency relationship evolutionary representation temporal graph convolution
下载PDF
Systematic Method for Constructing Lewis Representations
2
作者 Lahbib Abbas Lahcen Bih +3 位作者 Khalid Yamni Abderrahim Elyahyaouy Abdelmalik El Attaoui Zahra Ramzi 《Open Journal of Inorganic Chemistry》 2024年第1期1-18,共18页
The systematic method for constructing Lewis representations is a method for representing chemical bonds between atoms in a molecule. It uses symbols to represent the valence electrons of the atoms involved in the bon... The systematic method for constructing Lewis representations is a method for representing chemical bonds between atoms in a molecule. It uses symbols to represent the valence electrons of the atoms involved in the bond. Using a number of rules in a defined order, it is often better suited to complicated cases than the Lewis representation of atoms. This method allows us to determine the formal charge and oxidation number of each atom in the edifice more efficiently than other methods. 展开更多
关键词 Systematic Method Lewis Representation Chemical Bond Formal Charge Oxidation Number
下载PDF
Using Speaker-Specific Emotion Representations in Wav2vec 2.0-Based Modules for Speech Emotion Recognition
3
作者 Somin Park Mpabulungi Mark +1 位作者 Bogyung Park Hyunki Hong 《Computers, Materials & Continua》 SCIE EI 2023年第10期1009-1030,共22页
Speech emotion recognition is essential for frictionless human-machine interaction,where machines respond to human instructions with context-aware actions.The properties of individuals’voices vary with culture,langua... Speech emotion recognition is essential for frictionless human-machine interaction,where machines respond to human instructions with context-aware actions.The properties of individuals’voices vary with culture,language,gender,and personality.These variations in speaker-specific properties may hamper the performance of standard representations in downstream tasks such as speech emotion recognition(SER).This study demonstrates the significance of speaker-specific speech characteristics and how considering them can be leveraged to improve the performance of SER models.In the proposed approach,two wav2vec-based modules(a speaker-identification network and an emotion classification network)are trained with the Arcface loss.The speaker-identification network has a single attention block to encode an input audio waveform into a speaker-specific representation.The emotion classification network uses a wav2vec 2.0-backbone as well as four attention blocks to encode the same input audio waveform into an emotion representation.These two representations are then fused into a single vector representation containing emotion and speaker-specific information.Experimental results showed that the use of speaker-specific characteristics improves SER performance.Additionally,combining these with an angular marginal loss such as the Arcface loss improves intra-class compactness while increasing inter-class separability,as demonstrated by the plots of t-distributed stochastic neighbor embeddings(t-SNE).The proposed approach outperforms previous methods using similar training strategies,with a weighted accuracy(WA)of 72.14%and unweighted accuracy(UA)of 72.97%on the Interactive Emotional Dynamic Motion Capture(IEMOCAP)dataset.This demonstrates its effectiveness and potential to enhance human-machine interaction through more accurate emotion recognition in speech. 展开更多
关键词 Attention block IEMOCAP dataset speaker-specific representation speech emotion recognition wav2vec 2.0
下载PDF
Examination of the Illness Representations among Children with T1DM in Relation to Mental Health Factors
4
作者 Brigitta Munkácsi EnikőFelszeghy +1 位作者 Flóra Kenyhercz Beáta Erika Nagy 《International Journal of Mental Health Promotion》 2023年第8期961-969,共9页
The most common comorbid psychiatric disorders in children with type 1 diabetes mellitus(T1DM)are depression,anxiety and behavioral disorders.Patients with comorbid psychopathology are less capable of psychically adju... The most common comorbid psychiatric disorders in children with type 1 diabetes mellitus(T1DM)are depression,anxiety and behavioral disorders.Patients with comorbid psychopathology are less capable of psychically adjusting to the new life situation resulting from T1DM,which may negatively affect glycemic control and adherence related to the treatment.We aimed to investigate the association between mental health and type 1 diabetes including illness representation.115 children and adolescents with T1DM were recruited through the outpatient clinic in Debrecen,Hungary.Measures:PRISM-D,Child Depression Inventory(CDI),Cantril Ladder and Self-Rated Health,Glycosylaeted haemoglobin(HbA1C)were measured.Children having depressive symptoms drew fewer circles with less area.Children not drawing any important relationships possessed more depressive symptoms.Those diagnosed at a younger age displayed smaller distance between the Self-and Illness-circles.The PRISM-D test can be a promising tool to analyse emotional and cognitive representations and the psychological burden of T1DM. 展开更多
关键词 T1DM illness representation mental health DEPRESSION children and adolescents
下载PDF
Socio-Cultural Representations and Therapeutic Itineraries of Parents of Autistic Children Followed in the INSP’s Children’s Mental Health Services
5
作者 Koffi Paulin Konan Brahim Samuel Traore +3 位作者 Ettié Sylvie Kouassi Yao Etienne Kouadio Kouadio Régis Aymar Yao Yessonguilana Jean-Marie Yeo-Tenena 《Open Journal of Psychiatry》 2023年第1期1-9,共9页
Pervasive developmental disorders (PDD) remain little known to populations in developing countries. In black Africa their social representations remain strongly influenced by local belief systems. The general objectiv... Pervasive developmental disorders (PDD) remain little known to populations in developing countries. In black Africa their social representations remain strongly influenced by local belief systems. The general objective of this study was to understand the perceptions and representations of Ivorian parents vis-à-vis PDD. This was a mixed (qualitative and quantitative) prospective cross-sectional study with a descriptive aim that involved a sample of 49 parents. The sampling was of the qualitative type by multiple cases with reasoned choice by saturation. Our results showed that male parents were mostly aged between 40 - 49 years (48.98%) with a higher level of education (67.34%) while mothers were mostly aged between 30 - 39 (61.22%) and a higher level (30.61%). Autistic children were negatively perceived by their parents: either as a source of psychological suffering (82.85%), or as mysterious children who sacrificed their parents (44.66%), or as “bobo” children (mute children in common Ivorian language) (16.66%) or like rude children (13.34%). The supposed origin of the disorder according to the parents was mystical-religious (60.94%);natural (25%);hereditary (6.25%). In 6.25% of cases, PDD were assumed to be of unknown or iatrogenic origin attributable to vaccination (1.56%). 75.51% of parents said that in addition to conventional medical therapies, they also used traditional therapies. The use of this therapeutic alternative would be linked to the perceptions and beliefs that feed the socio-cultural representations of our respondents. 展开更多
关键词 Pervasive Developmental Disorders Socio-Cultural Representation PARENTS Therapeutic Itinerary
下载PDF
bell hooks: To Resist Misrepresentations of the Outlaw Culture
6
作者 黄春燕 《海外英语》 2012年第4X期3-5,共3页
The thesis summarizes bell hooks' stand and viewpoints as expressed in her book Outlaw Culture:Resisting Representations.In this collection,hooks argues that the outlaw culture,a culture of the marginalized groups... The thesis summarizes bell hooks' stand and viewpoints as expressed in her book Outlaw Culture:Resisting Representations.In this collection,hooks argues that the outlaw culture,a culture of the marginalized groups including black people and women,is either distorted or misinterpreted by the mainstream culture which is a white supremacist patriarchal one.Therefore,she calls for a resistance against the mainstream culture's misrepresentations of the outlaw culture. 展开更多
关键词 BELL HOOKS OUTLAW CULTURE RESIST representations t
下载PDF
Representations of Co-regular Subsets on Euclidean Spaces 被引量:2
7
作者 邱玉文 王莉萍 赵希顺 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2007年第2期252-257,共6页
For the computability of co-regular subsets in metric spaces, the properties of the co-regular subsets and several reasonable representations on co-regular sets have been suggested in this paper. As last, the 'weaker... For the computability of co-regular subsets in metric spaces, the properties of the co-regular subsets and several reasonable representations on co-regular sets have been suggested in this paper. As last, the 'weaker or stronger' relations of these representations have been revealed. 展开更多
关键词 type-2 theory of effectivity COMPUTABILITY computable set representations
下载PDF
Multipartite State Representations in Multi-mode Fock Space and Their Squeezing Transformations 被引量:1
8
作者 YUAN Hong-Chun LI Heng-Mei QI Kai-Guo 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第1期31-34,共4页
We present the continuous state vector of the total coordinate of multi-partlcle and the state vector of their total momentum, respectively, which possess completeness relation in multi-mode Fock space by virtue of th... We present the continuous state vector of the total coordinate of multi-partlcle and the state vector of their total momentum, respectively, which possess completeness relation in multi-mode Fock space by virtue of the integration within an order product (IWOP) technique. We also calculate the transition from classical transformation of variables in the states to quantum unitary operator, deduce a new multi-mode squeezing operator, and discuss its squeezing effect. In progress, it indicates that the IWOP technique provides a convenient way to construct new representation in quantum mechanics. 展开更多
关键词 IWOP technique multipartite state representations squeezing operator
下载PDF
Enhanced LMI Representations for H2 Performance of Polytopic Uncertain Systems: Continuous-time Case 被引量:1
9
作者 Ai-Guo Wu Guang-Ren Duan 《International Journal of Automation and computing》 EI 2006年第3期304-308,共5页
Based on two recent results, several new criteria of H2 performance for continuous-time linear systems are established by introducing two slack matrices. When used in robust analysis of systems with polytopic uncertai... Based on two recent results, several new criteria of H2 performance for continuous-time linear systems are established by introducing two slack matrices. When used in robust analysis of systems with polytopic uncertainties, they can reduce conservatism inherent in the earlier quadratic method and the established parameter-dependent Lyapunov function approach. Two numerical examples are included to illustrate the feasibility and advantage of the proposed representations. 展开更多
关键词 LMI representations H2 performance polytopic uncertainty continuous-time systems
下载PDF
FREUD-BUTZER-HAHN TYPE QUANTITATIVE THEOREMS FOR PROBABILISTIC REPRESENTATIONS OF(C_0)OPERATOR SEMIGROUPS 被引量:1
10
作者 Chen Wenzhong (Xiamen University China)Zhou Mi (Xiamen Fisheries College,China) 《Analysis in Theory and Applications》 1993年第3期1-8,共8页
In this paper,we shall exploit the Freud method in the Classical operator approximation theory to im- prove known quantitative estimalions with an emphasis on Calculah' on the generic constants.
关键词 Th FREUD-BUTZER-HAHN TYPE QUANTITATIVE THEOREMS FOR PROBABILISTIC representations OF C0)OPERATOR SEMIGROUPS
下载PDF
Special Unipotent Representations of Simple Linear Lie Groups of Type A
11
作者 Dan BARBASCH Jia Jun MA +1 位作者 Bin Yong SUN Chen Bo ZHU 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2024年第3期707-716,共10页
Let G be a special linear group over the real,the complex or the quaternion,or a special unitary group.In this note,we determine all special unipotent representations of G in the sense of Arthur and Barbasch-Vogan,and... Let G be a special linear group over the real,the complex or the quaternion,or a special unitary group.In this note,we determine all special unipotent representations of G in the sense of Arthur and Barbasch-Vogan,and show in particular that all of them are unitarizable. 展开更多
关键词 Special unipotent representations unitary representations coherent continuation Weyl group representations
原文传递
QUASI-PERMUTATION REPRESENTATIONS OF ALTERNATING AND SYMMETRIC GROUPS
12
作者 Houshang Behravesh Mohammad Hossein Jafari 《Acta Mathematica Scientia》 SCIE CSCD 2007年第2期297-300,共4页
The quantities c(G), q(G) and p(G) for finite groups were defined by H. Behravesh. In this article, these quantities for the alternating group An and the symmetric group Sn are calculated. It is shown that c(G... The quantities c(G), q(G) and p(G) for finite groups were defined by H. Behravesh. In this article, these quantities for the alternating group An and the symmetric group Sn are calculated. It is shown that c(G) = q(G) = p(G) = n,when G = An or Sn. 展开更多
关键词 Quasi-permutation representations alternating groups symmetric groups character theory
下载PDF
STRONG REPRESENTATIONS OF THE SURVIVAL FUNCTION ESTIMATOR ON INCREASING SETS FOR TRUNCATED AND CENSORED DATA
13
作者 孙六全 郑忠国 《Acta Mathematica Scientia》 SCIE CSCD 1999年第3期251-260,共10页
In this paper, based on random left truncated and right censored data, the authors derive strong representations of the cumulative hazard function estimator and the product-limit estimator of the survival function. wh... In this paper, based on random left truncated and right censored data, the authors derive strong representations of the cumulative hazard function estimator and the product-limit estimator of the survival function. which are valid up to a given order statistic of the observations. A precise bound for the errors is obtained which only depends on the index of the last order statistic to be included. 展开更多
关键词 truncated and censored data cumulative hazard function product-limit estimator strong representations
下载PDF
Canonical and Boundary Representations on Rank One Para-Hermitian Spaces
14
作者 Anatoli A. Artemov 《Applied Mathematics》 2013年第11期35-40,共6页
This work studies the canonical representations (Berezin representations) for para-Hermitian symmetric spaces of rank one. These spaces are exhausted up to the covering by spaces?G/H?with G = SL(n,R),H = GL(n-1,R)?. F... This work studies the canonical representations (Berezin representations) for para-Hermitian symmetric spaces of rank one. These spaces are exhausted up to the covering by spaces?G/H?with G = SL(n,R),H = GL(n-1,R)?. For Hermitian symmetric spaces G/K, canonical representations were introduced by Berezin and Vershik-Gelfand-Graev. They are unitary with respect to some invariant non-local inner product (the Berezin form). We consider canonical representations in a wider sense: we give up the condition of unitarity and let these representations act on spaces of distributions. For our spaces G/H, the canonical representations turn out to be tensor products of representations of maximal degenerate series and contragredient representations. We decompose the canonical representations into irreducible constituents and decompose boundary representations. 展开更多
关键词 Para-Hermitian Symmetric SPACES Overgroups CANONICAL representations Boundary representations POISSON and Fourier Transforms
下载PDF
Transition Dipole, Charge Transfer, and Electron-hole Coherence in Two-photon Absorption: Visualizations with Two Dimensional Site and Three Dimensional Cube Representations
15
作者 Yuan-zuo Li Wen-qin Zhang +2 位作者 Xiao-hong Zhao Feng-cai Ma Mao-du Chen 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2009年第5期529-534,I0002,共7页
The developed visualization methods of two dimensional (2D) site and three dimensional (3D) cube representations have been performed to show the orientation of transition dipole, charge transfer, and electron-hole... The developed visualization methods of two dimensional (2D) site and three dimensional (3D) cube representations have been performed to show the orientation of transition dipole, charge transfer, and electron-hole coherence in two-photon absorption (TPA). The 3D cube representations of transition density can reveal visually the orientation and strength of transition dipole moment, and charge different density show the orientation of charge transfer in TPA. The 2D site representation can reveal visually the electron-hole coherence in TPA. The combination of 2D site and 3D cube representations provide clearly inspect into the charge transfer process and the contribution of excited molecular segments for TPA. 展开更多
关键词 2D site and 3D cube representations Charge transfer Transition dipole Two-photon absorption
下载PDF
Narrative Representations in Adolescents With Learning Difficulties
16
作者 Malacrida Marta Provantini Katia Mittino Filippo 《Psychology Research》 2019年第5期203-215,共13页
This research develops from clinical practice. Our aim is to provide a precise description of mental functioning of adolescents with learning difficulties (LDs) in order to improve the knowledge of this kind of proble... This research develops from clinical practice. Our aim is to provide a precise description of mental functioning of adolescents with learning difficulties (LDs) in order to improve the knowledge of this kind of problems and consequently to get better therapeutic approaches. We focus on narrative representations and we study how these adolescents construct and build stories. We assess 40 adolescents through the use of two kind of tests: Thematic Apperception Test (TAT) and Wechsler Intelligence Scale for Children (WISC-III). In addition, we compare this group with another clinical sample of adolescents. In our sample, learning difficulties are not linked to lower cognitive level, but can be understood as a maturational gap. In the narratives of the adolescents with LDs, we find a typical adolescent narrative: In most cases, the protagonist starts from a position of dependence finally reaching a position of greater autonomy. There are significant differences between the males and females in our sample, which suggest a different mode of learning ability and disability for each sex. 展开更多
关键词 adolescents LEARNING DIFFICULTIES NARRATIVE representations
下载PDF
CANONICAL REPRESENTATIONS AND DEGREE OF FREEDOM FORMULAE OF ORTHOGONAL TENSORS IN N-DIMENSIONAL EUCLIDEAN SPACE
17
作者 熊祝华 郑泉水 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1989年第1期93-101,共9页
In this paper, with the help of the eigenvalue properties of orthogonal tensors in n-dimensional Euclidean space and the representations of the orthogonal tensors in 2-dimensional space, the canonical representations ... In this paper, with the help of the eigenvalue properties of orthogonal tensors in n-dimensional Euclidean space and the representations of the orthogonal tensors in 2-dimensional space, the canonical representations of orthogonal tensors in n-dimensional Euclidean space are easily gotten. The paper also gives all the constraint relationships among the principal invariants of arbitrarily given orthogonal tensor by use of Cayley-Hamilton theorem; these results make it possible to solve all the eigenvalues of any orthogonal tensor based on a quite reduced equation of m-th order, where m is the integer part ofn \2. Finally, the formulae of the degree of freedom of orthogonal tensors are given. 展开更多
关键词 CANONICAL representations AND DEGREE OF FREEDOM FORMULAE OF ORTHOGONAL TENSORS IN N-DIMENSIONAL EUCLIDEAN SPACE exp
下载PDF
"A Walk in Between"--On Hart Crane's Imagination of Representational Space and Representations of Space in The Bridge
18
作者 Billy Bin Feng Huang 《Journal of Literature and Art Studies》 2016年第7期722-735,共14页
In this paper, Henri Lefebvre's theorizations about representational space and representations of space will be employed to examine Hart Crane's imagination of them in The Bridge. First, according to Lefebvre, repre... In this paper, Henri Lefebvre's theorizations about representational space and representations of space will be employed to examine Hart Crane's imagination of them in The Bridge. First, according to Lefebvre, representations of space are created with violence for the purpose of accumulating capital. On the other hand, representational space is directly lived or affectively felt, opened up by inhabitants' imagination. In addition, Lefebvre points out that in abstract space, representational space will be invaded by representations of space. In The Bridge, Crane's affective experience with the Brooklyn Bridge or the subway indicates that he treats New York as a representational space. Besides, Crane expresses his concern for how capitalism has encroached on it. It would seem that Crane has followed Lefebvre's line of thinking in The Bridge. However, it is actually a specious analysis because both the Brooklyn Bridge and the subway are representations of space. And in this long poem, Crane feels the urban space through history, which plays a key role in creating representations of space. Thus, we can conclude that Crane is actually taking "a walk in between" in The Bridge. With his imagination, Crane has combined representations of space and representational space into his own poetic vision. 展开更多
关键词 (Henri) Lefebvre representations of space representational space (Hart) Crane The Bridge
下载PDF
Hierarchical Representations Feature Deep Learning for Face Recognition
19
作者 Haijun Zhang Yinghui Chen 《Journal of Data Analysis and Information Processing》 2020年第3期195-227,共33页
Most modern face recognition and classification systems mainly rely on hand-crafted image feature descriptors. In this paper, we propose a novel deep learning algorithm combining unsupervised and supervised learning n... Most modern face recognition and classification systems mainly rely on hand-crafted image feature descriptors. In this paper, we propose a novel deep learning algorithm combining unsupervised and supervised learning named deep belief network embedded with Softmax regress (DBNESR) as a natural source for obtaining additional, complementary hierarchical representations, which helps to relieve us from the complicated hand-crafted feature-design step. DBNESR first learns hierarchical representations of feature by greedy layer-wise unsupervised learning in a feed-forward (bottom-up) and back-forward (top-down) manner and then makes more efficient recognition with Softmax regress by supervised learning. As a comparison with the algorithms only based on supervised learning, we again propose and design many kinds of classifiers: BP, HBPNNs, RBF, HRBFNNs, SVM and multiple classification decision fusion classifier (MCDFC)—hybrid HBPNNs-HRBFNNs-SVM classifier. The conducted experiments validate: Firstly, the proposed DBNESR is optimal for face recognition with the highest and most stable recognition rates;second, the algorithm combining unsupervised and supervised learning has better effect than all supervised learning algorithms;third, hybrid neural networks have better effect than single model neural network;fourth, the average recognition rate and variance of these algorithms in order of the largest to the smallest are respectively shown as DBNESR, MCDFC, SVM, HRBFNNs, RBF, HBPNNs, BP and BP, RBF, HBPNNs, HRBFNNs, SVM, MCDFC, DBNESR;at last, it reflects hierarchical representations of feature by DBNESR in terms of its capability of modeling hard artificial intelligent tasks. 展开更多
关键词 Face Recognition UNSUPERVISED Hierarchical representations Hybrid Neural Networks RBM Deep Belief Network Deep Learning
下载PDF
Reading, Habitus, and Social Representations in a University Context
20
作者 Sofia Amavizca-Montano Lilian Salado-Rodriguez 《Sino-US English Teaching》 2014年第12期898-911,共14页
The lack of reading habits among Mexican population is an idea based on national and international indicators, which illustrate the danger of this situation; however, these indicators fail to go deeper into the proble... The lack of reading habits among Mexican population is an idea based on national and international indicators, which illustrate the danger of this situation; however, these indicators fail to go deeper into the problem. This project was aimed to obtain more information about the habitus and social representations of college students reading habits, using as theoretical elements the principles developed by Pierre Bourdieu and Serge Moscovici. The project was developed in a public university, located in Mexico's northeast region; 19 students were part of the sample group. Two research tools were used to obtain data: survey and focus group. The project analyzed academic and environmental aspects, beyond the "ought to be", that affected the development and provided characteristics on the daily sociocultural reality of the students, with a view of the real environment of the students without "make-up". The project deepened into the analysis of the reading practices and not only the usual numeric indicators, which traditionally condemn the reading practices in Mexico. The results of this study showed that students read a lot more than what they and their teachers think they do, this taking into consideration electronic documents, general interest publications, and commercial magazines, among others. The point of view of some teachers and researchers, when it comes to reading habits recognize non-academic, simple and interesting reading more important impact on their reading habits shows a tendency to be pedantic and canonic; it does not for young people, which in the long term, could have a 展开更多
关键词 READING HABITUS social representations college students
下载PDF
上一页 1 2 81 下一页 到第
使用帮助 返回顶部