全文获取类型
收费全文 | 235篇 |
免费 | 1篇 |
国内免费 | 6篇 |
专业分类
教育 | 137篇 |
科学研究 | 81篇 |
体育 | 3篇 |
综合类 | 8篇 |
信息传播 | 13篇 |
出版年
2023年 | 24篇 |
2022年 | 17篇 |
2021年 | 8篇 |
2020年 | 5篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2017年 | 4篇 |
2015年 | 4篇 |
2014年 | 11篇 |
2013年 | 7篇 |
2012年 | 7篇 |
2011年 | 16篇 |
2010年 | 16篇 |
2009年 | 14篇 |
2008年 | 12篇 |
2007年 | 14篇 |
2006年 | 14篇 |
2005年 | 13篇 |
2004年 | 13篇 |
2003年 | 13篇 |
2002年 | 4篇 |
2001年 | 6篇 |
2000年 | 3篇 |
1999年 | 7篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1990年 | 1篇 |
排序方式: 共有242条查询结果,搜索用时 15 毫秒
1.
对称矩阵是一类很重要的矩阵.矩阵微分方程、数学物理问题经离散后一般得到对称形式线性方程,文中讨论矩阵方程AXB=C在对称矩阵类中求解问题. 相似文献
3.
考虑了一类有如下形式的对称统计量Tn=k(n-k) k(k-1)2-1∑n-ki=1∑i kj=i 1φ(Xi,Xj) ∑n-1i=n-k 1∑nj=i 1φ(Xi,Xj),这里φ(Xi,Xj)为一对称函数,其中k为不大于n的自然数.这一表达形式是一类统计量,当k=n-1时,它就是一U统计量.在假定E(φ2(Xi,Xj)≤M<∞下,研究了Tn的强相合性. 相似文献
4.
涂玉芬 《温州职业技术学院学报》2011,11(4):52-55
为有效帮助铁道工程技术管理人员进行工程工期估算,合理调度和控制各子工程的施工进度,运用Graph结构中的AOE网分析工期估算算法,可实现计算机辅助管理,有利于科学管理铁道工程。 相似文献
5.
6.
讨论了求对称反循环矩阵逆矩阵的一般方法,并根据反循环矩阵与对称反循环矩阵的特殊关系给出几类特殊对称反循环矩阵的逆矩阵. 相似文献
7.
8.
9.
《Information processing & management》2022,59(4):102992
Structured sentiment analysis is a newly proposed task, which aims to summarize the overall sentiment and opinion status on given texts, i.e., the opinion expression, the sentiment polarity of the opinion, the holder of the opinion, and the target the opinion towards. In this work, we investigate a transition-based model for end-to-end structured sentiment analysis task. We design a transition architecture which supports the recognition of all the possible opinion quadruples in one shot. Based on the transition backbone, we then propose a Dual-Pointer module for more accurate term boundary detection. Besides, we further introduce a global graph reasoning mechanism, which helps to learn the global-level interactions between the overlapped quadruples. The high-order features are navigated into the transition system to enhance the final predictions. Extensive experimental results on five benchmarks demonstrate both the prominent efficacy and efficiency of our system. Our model outperforms all baselines in terms of all metrics, especially achieving a 10.5% point gain over the current best-performing system only detecting the holder-target-opinion triplets. Further analyses reveal that our framework is also effective in solving the overlapping structure and long-range dependency issues. 相似文献
10.
《Information processing & management》2022,59(4):102967
Graph-based multi-view clustering aims to take advantage of multiple view graph information to provide clustering solutions. The consistency constraint of multiple views is the key of multi-view graph clustering. Most existing studies generate fusion graphs and constrain multi-view consistency by clustering loss. We argue that local pair-view consistency can achieve fine-modeling of consensus information in multiple views. Towards this end, we propose a novel Contrastive and Attentive Graph Learning framework for multi-view clustering (CAGL). Specifically, we design a contrastive fine-modeling in multi-view graph learning using maximizing the similarity of pair-view to guarantee the consistency of multiple views. Meanwhile, an Att-weighted refined fusion graph module based on attention networks to capture the capacity difference of different views dynamically and further facilitate the mutual reinforcement of single view and fusion view. Besides, our CAGL can learn a specialized representation for clustering via a self-training clustering module. Finally, we develop a joint optimization objective to balance every module and iteratively optimize the proposed CAGL in the framework of graph encoder–decoder. Experimental results on six benchmarks across different modalities and sizes demonstrate that our CAGL outperforms state-of-the-art baselines. 相似文献