排序方式： 共有21条查询结果，搜索用时 31 毫秒
1.
《Information processing & management》2022,59(1):102790
Entity alignment is an important task for the Knowledge Graph (KG) completion, which aims to identify the same entities in different KGs. Most of previous works only utilize the relation structures of KGs, but ignore the heterogeneity of relations and attributes of KGs. However, these information can provide more feature information and improve the accuracy of entity alignment. In this paper, we propose a novel Multi-Heterogeneous Neighborhood-Aware model (MHNA) for KGs alignment. MHNA aggregates multi-heterogeneous information of aligned entities, including the entity name, relations, attributes and attribute values. An important contribution is to design a variant attention mechanism, which adds the feature information of relations and attributes to the calculation of attention coefficients. Extensive experiments on three well-known benchmark datasets show that MHNA significantly outperforms 12 state-of-the-art approaches, demonstrating that our approach has good scalability and superiority in both cross-language and monolingual KGs. An ablation study further supports the effectiveness of our variant attention mechanism. 相似文献
2.
从工程图识读课程的一线教学实践出发,分析实践教学条件、理论知识转化、教学效果检验等方面存在的问题,并结合CD IO工程教育理念,设计包含柱、梁、剪力墙钢筋骨架绑扎以及图纸会审、技术交底等四个环节的工程图识读CD IO三级项目,在教学方法、教学内容、实践条件和考核方式等四个方面进行改革和创新。在工程造价专业中试点、改进,并在建筑工程技术专业推广、实施,经过两个学期的教学实践,工程图识读课程取得良好的教学效果。 相似文献
3.
袁克俭 《湘潭师范学院学报(社会科学版)》1996,(6)
本文对病毒性肝炎２１３例胆囊声像图变化进行分析，初步探讨了病毒性肝炎胆囊改变发生机制。 相似文献
4.
主要研究了函数图象的盒维数。通过定义函数图象,并给出函数图象的盒维数,从而在dim BΓ（f,I）,dim BΓ（g,I）,dim BΓ（f±g,I）之间建立结合关系。 相似文献
5.
Fermín L. Cruz Carlos G. VallejoFernando Enrı´quez José A. Troyano 《Information processing & management》2012
In this paper we present the relevance ranking algorithm named PolarityRank. This algorithm is inspired in PageRank, the webpage relevance calculus method used by Google, and generalizes it to deal with graphs having not only positive but also negative weighted arcs. Besides the definition of our algorithm, this paper includes the algebraic justification, the convergence demonstration and an empirical study in which PolarityRank is applied to two unrelated tasks where a graph with positive and negative weights can be built: the calculation of word semantic orientation and instance selection from a learning dataset. 相似文献
6.
7.
Karen Peterman Kayla A. Cranston Marie Pryor Ruth Kermish-Allen 《International Journal of Science Education》2013,35(17):2787-2808
This case study was conducted within the context of a place-based education project that was implemented with primary school students in the USA. The authors and participating teachers created a performance assessment of standards-aligned tasks to examine 6–10-year-old students’ graph interpretation skills as part of an exploratory research project. Fifty-five students participated in a performance assessment interview at the beginning and end of a place-based investigation. Two forms of the assessment were created and counterbalanced within class at pre and post. In situ scoring was conducted such that responses were scored as correct versus incorrect during the assessment's administration. Criterion validity analysis demonstrated an age-level progression in student scores. Tests of discriminant validity showed that the instrument detected variability in interpretation skills across each of three graph types (line, bar, dot plot). Convergent validity was established by correlating in situ scores with those from the Graph Interpretation Scoring Rubric. Students’ proficiency with interpreting different types of graphs matched expectations based on age and the standards-based progression of graphs across primary school grades. The assessment tasks were also effective at detecting pre–post gains in students’ interpretation of line graphs and dot plots after the place-based project. The results of the case study are discussed in relation to the common challenges associated with performance assessment. Implications are presented in relation to the need for authentic and performance-based instructional and assessment tasks to respond to the Common Core State Standards and the Next Generation Science Standards. 相似文献
8.
关于Halin图染色方面的一些结果 总被引：2，自引：0，他引：2
刘景发 《衡阳师范学院学报》2001,22(6):43-45
简述Halin图的着色方面的一些结果，并证明了3－正则Halin图的点边全色数4≤χT(G)≤5。 相似文献
9.
10.
王湘云 《毕节师范高等专科学校学报》2013,(4):8-12,128
集合论是研究集合的数学理论,也是整个现代数学的基础。集合是集合论中最基本的对象。从集合的概念出发,描述集合论悖论的产生及解决方法,继而将集合区分为良基集和非良基集,探讨了用图来刻画集合的方法。考察集合和图的关系是探究非良基现象的一种有力工具,具有重要的理论意义。 相似文献