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131.
张蔚萍 《黄河科技大学学报》2004,6(1):41-47
党中央之所以把代表最广大人民的根本利益作为“三个代表”的根本问题,是因为它体现了党的根本宗旨和党建的根本经验;揭示了原苏联解体的根本教训;提醒我党要高度重视解决现实生活中带根本性的问题。只有全面正确理解“代表最广大人民根本利益”的科学内涵和基本精神,作到执政为民,加强党的自身建设,才能实现代表最广大人民根本利益的崇高目标。 相似文献
132.
Using multiple representations and argumentation are two fundamental processes in science. With the advancements of information communication technologies, these two processes are blended more so than ever before. However, little is known about how these two processes interact with each other in student learning. Hence, we conducted a design-based study in order to distill the relationship between these two processes. Specifically, we designed a learning unit on nuclear energy and implemented it with a group of preservice middle school teachers. The participants used a web-based knowledge organization platform that incorporated three representational modes: textual, concept map, and pictorial. The participants organized their knowledge on nuclear energy by searching, sorting, clustering information through the use of these representational modes and argued about the nuclear energy issue. We found that the use of multiple representations and argumentation interacted with each other in a complex way. Based on our findings, we argue that the complexity can be unfolded in two aspects: (a) the use of multiple representations mediates argumentation in different forms and for different purposes; (b) the type of argumentation that leads to refinement of the use of multiple representations is often non-mediated and drawn from personal experience. 相似文献
133.
Andreas Lichtenberger;Tommi Kokkonen;Lennart Schalk; 《科学教学研究杂志》2024,61(9):2258-2290
Multiple external representations (MERs) are useful for teaching complex content in science education. An open question is whether there is an especially effective way to sequence MERs. On the one hand, the so-called concreteness fading approach suggests starting instruction with more concrete representations and proceeding stepwise to more idealized representations. The effectiveness of this fading approach is, however, supported mainly by studies in mathematics education, while the results in physics are equivocal. On the other hand, presenting different representations simultaneously may support linking, that is, the comparison and contrast of representations, which may benefit learning. In an experimental classroom study (N = 187), we compared concreteness fading and simultaneous presentation of MERs for learning a challenging physics content in high school, namely, Faraday's law. We found no significant differences between conditions in posttest performance, and an equivalence test with bounds d = −0.5 to 0.5 showed that both approaches performed equally. The results align with previous findings questioning the superiority of concreteness fading over other ways of sequencing MERs. Therefore, facilitating students' understanding of a complex physics content may involve more than determining the optimal order of presenting MERs. We discuss limitations of the present study and implications for future research and practice. 相似文献
134.
135.
Patricia E. Calderwood 《Early Childhood Education Journal》1999,27(1):21-27
Learning to be a competent language user may be the most complex task human beings undertake, yet the one most taken for granted. This paper examines a song spontaneously created and sung by a 44-month-old child. The song, an element of bath-time play, weaves a chapter in her ongoing self-narrative, disclosing not only her sense of herself as a developing person, but also revealing her struggle with this development. Examination of the relation of the structure and functions of the song demonstrates that it is a variation of egocentric speech clearly connected to her thinking and not merely a tuneful accompaniment to her imaginative play. Early childhood educators and care-givers often witness similar episodes of language use among children engrossed in play in school settings. Observation of the form and content of such language use can provide the early childhood teacher or caregiver with information about a child's language development, sense of self, and readiness for formal and informal literacy experiences, which presume a developing facility and competence in thinking through language. 相似文献
136.
严希洪 《玉溪师范学院学报》2001,17(5):14-17
本文通过对江泽民同志"七一"讲话的学习,从高校应树立正确的育人观和高校如何成为先进文化的发祥地两个方面阐述了作者的基本观点. 相似文献
137.
After the significant discovery of the hole-doped nickelate compound Nd0.8Sr0.2NiO2, analyses of the electronic structure, orbital components, Fermi surfaces and band topology could be helpful to understand the mechanism of its superconductivity. Based on first-principle calculations, we find that Ni states contribute the largest Fermi surface. The states form an electron pocket at Γ, while 5dxy states form a relatively bigger electron pocket at A. These Fermi surfaces and symmetry characteristics can be reproduced by our two-band model, which consists of two elementary band representations: B1g@1a ⊕ A1g@1b. We find that there is a band inversion near A, giving rise to a pair of Dirac points along M-A below the Fermi level upon including spin-orbit coupling. Furthermore, we perform density functional theory based Gutzwiller (DFT+Gutzwiller) calculations to treat the strong correlation effect of Ni 3d orbitals. In particular, the bandwidth of has been renormalized largely. After the renormalization of the correlated bands, the Ni 3dxy states and the Dirac points become very close to the Fermi level. Thus, a hole pocket at A could be introduced by hole doping, which may be related to the observed sign change of the Hall coefficient. By introducing an additional Ni 3dxy orbital, the hole-pocket band and the band inversion can be captured in our modified model. Besides, the nontrivial band topology in the ferromagnetic two-layer compound La3Ni2O6 is discussed and the band inversion is associated with Ni and La 5dxy orbitals. 相似文献
138.
Research in physics education indicates that the use of multiple representations in teaching and learning helps students become better problem-solvers. We report on a study to investigate students＇ difficulties in solving mechanics problems presented in multiple representations. We conducted teaching/learning interviews with 20 students in a first-semester calculus-based physics course which covered introductory classical mechanics. Each student was interviewed four times during the semester, each time after they had completed an exam in the course. During these interviews, students were asked to solve a problem they had seen in the exam, followed by problems that differed in the type of representation from the exam problems. Students were provided verbal hints to solve the new problems. We discuss the common difficulties students encountered when attempting to solve problems in different representations and some common themes in students＇ performance. 相似文献
139.
Alicia Izharuddin 《Inter-Asia Cultural Studies》2013,14(4):538-550
ABSTRACTThe rise in LGBT-themed novels in Indonesia over the last decade demonstrates the sea-change in social attitudes and the public presence of sexual and gender minorities in Indonesia. The genre emerges from the popularity of sexually-charged novels by female authors such as Ayu Utami and Djenar Maesa Ayu. However, many novels were criticised for the supposed westernisation of Indonesian culture that threatens the national identity and moral disposition of its readers. This article explores the underlying themes of these criticisms—nationhood, cultural authenticity, and morality—and juxtaposes them with the claims of cultural authenticity and legitimacy made by gay and lesbi Indonesians. Representations of “traditional” homoeroticisms in the novel Mairil by Syarifuddin bring these lines of arguments together and synthesise a discursive space where cultural and national authenticities are “queered.” It is my contention that religious and traditional elements that foster same-sex practices offer a key to queer legitimacy for Indonesian sexual minorities. 相似文献
140.
《Information processing & management》2022,59(6):103103
Representation learning has recently been used to remove sensitive information from data and improve the fairness of machine learning algorithms in social applications. However, previous works that used neural networks are opaque and poorly interpretable, as it is difficult to intuitively determine the independence between representations and sensitive information. The internal correlation among data features has not been fully discussed, and it may be the key to improving the interpretability of neural networks. A novel fair representation algorithm referred to as FRC is proposed from this conjecture. It indicates how representations independent of multiple sensitive attributes can be learned by applying specific correlation constraints on representation dimensions. Specifically, dimensions of the representation and sensitive attributes are treated as statistical variables. The representation variables are divided into two parts related to and unrelated to the sensitive variables by adjusting their absolute correlation coefficient with sensitive variables. The potential impact of sensitive information on representations is concentrated in the related part. The unrelated part of the representation can be used in downstream tasks to yield fair results. FRC takes the correlation between dimensions as the key to solving the problem of fair representation. Empirical results show that our representations enhance the ability of neural networks to show fairness and achieve better fairness-accuracy tradeoffs than state-of-the-art works. 相似文献