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一种面向关系抽取的表填充依赖特征学习方法
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作者 唐媛 陈艳平 +2 位作者 扈应 黄瑞章 秦永彬 《计算机工程与应用》 CSCD 北大核心 2024年第13期143-151,共9页
基于表填充的关系抽取方法利用深度神经网络将句子映射到二维抽象表示,忽略了句子中不同跨度之间的语义结构,很难获取到句子中的长距离语义依赖。针对表填充方法的这一不足之处,提出了一个结合句法依存树的表填充关系抽取模型。该模型... 基于表填充的关系抽取方法利用深度神经网络将句子映射到二维抽象表示,忽略了句子中不同跨度之间的语义结构,很难获取到句子中的长距离语义依赖。针对表填充方法的这一不足之处,提出了一个结合句法依存树的表填充关系抽取模型。该模型通过双仿射将句子映射到二维抽象表示。利用句子的句法依存树初始化语义依赖邻接矩阵,利用邻接矩阵学习二维表示中单词与单词之间的句法依赖特征。使用门控循环单元提取特征对句子的二维表示进行更新,从而在句子二维抽象表示中获取跨度之间的语义依赖关系和句子的结构特征。实验结果表明提出的模型可以有效获取句子中的长距离语义依赖特征,通过学习跨度的语义依赖信息和句子的语法结构特征来提升关系抽取的性能。 展开更多
关键词 关系抽取 表填充 句法依存树 神经网络
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基于图注意力和表指针网络的中文事件抽取方法 被引量:1
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作者 刘炜 马亚威 +1 位作者 彭艳 李卫民 《模式识别与人工智能》 EI CSCD 北大核心 2023年第5期459-470,共12页
现有的中文事件抽取方法存在触发词和论元依赖建模不足的问题,削弱事件内的信息交互,导致论元抽取性能低下,特别是论元角色存在重叠的情况下.对此,文中提出基于图注意力和表指针网络的中文事件抽取方法(Chinese Event Extraction Method... 现有的中文事件抽取方法存在触发词和论元依赖建模不足的问题,削弱事件内的信息交互,导致论元抽取性能低下,特别是论元角色存在重叠的情况下.对此,文中提出基于图注意力和表指针网络的中文事件抽取方法(Chinese Event Extraction Method Based on Graph Attention and Table Pointer Network,ATCEE).首先,融合预训练字符向量和词性标注向量作为特征输入,并利用双向长短期记忆网络,得到事件文本的强化语义特征.再将字符级建模的依存句法图引入图注意力网络,捕获文本中各组成成分的长距离依赖关系.然后,使用表填充的方法进行特征融合,进一步增强触发词和其对应的所有论元之间的依赖性.最后,将学习得到的表特征输入全连接层和表指针网络层,进行触发词和论元的联合抽取,使用表指针网络对论元边界进行解码,更好地识别长论元实体.实验表明:ATCEE在ACE2005和DuEE1.0这两个中文基准数据集上都有明显的性能提升,并且字符级依存特征和表填充策略在一定程度上可以解决论元角色重叠问题.ATCEE源代码地址如下:https://github.com/event6/ATCEE. 展开更多
关键词 中文事件抽取 论元角色重叠 图注意力网络 表填充 指针网络
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深层网中基于入口查询的表单填充策略 被引量:3
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作者 马建华 李赛红 徐兰兰 《计算机工程》 CAS CSCD 北大核心 2010年第7期66-67,70,共3页
针对深层网中数据量大导致无法被传统搜索引擎索引的问题,在提取网页中,改进启发式规则识别表单查询入口,在表单标签与内容匹配时,改进基于语义的相似度匹配算法进行表单内容填充。实验结果表明,提取表单标签的准确率达到94.23%,匹配成... 针对深层网中数据量大导致无法被传统搜索引擎索引的问题,在提取网页中,改进启发式规则识别表单查询入口,在表单标签与内容匹配时,改进基于语义的相似度匹配算法进行表单内容填充。实验结果表明,提取表单标签的准确率达到94.23%,匹配成功率达到88.83%,填充成功率达到95.43%。 展开更多
关键词 深层网 入口查询 填充
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《智能变电站组态信息填充表》研究
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作者 田家运 赵勇 《机电信息》 2013年第18期174-175,共2页
主要介绍了《智能变电站组态信息填充表》的制作与使用方法。使用此表不仅能够促进实现智能变电站组态工作的标准化,提高工作效率,而且有利于归档和维护。
关键词 智能变电站 组态 信息填充 调试
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一种基于协同过滤的表单推荐录入模型 被引量:3
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作者 张洋 高岭 +1 位作者 高全力 杨建锋 《计算机工程》 CAS CSCD 北大核心 2016年第1期41-45,50,共6页
在基于B/S架构的信息管理系统使用过程中,必须完成大量表单数据的填写及录入,但目前其主要方式为手工录入,存在录入效率低和结果不准确等问题。为此,通过研究搜索引擎的实时预测功能和推荐系统,提出一种基于逆最近邻协同过滤的表单推荐... 在基于B/S架构的信息管理系统使用过程中,必须完成大量表单数据的填写及录入,但目前其主要方式为手工录入,存在录入效率低和结果不准确等问题。为此,通过研究搜索引擎的实时预测功能和推荐系统,提出一种基于逆最近邻协同过滤的表单推荐录入模型。介绍模型体系架构及执行流程,在此基础上设计改进的逆最近邻协同过滤算法,使用该算法获取基于用户行为的表单录入推荐结果,从而将个性化推荐应用于数据录入和表单填写领域。实验结果表明,该模型可有效提高数据录入效率和录入结果的准确率。 展开更多
关键词 数据录入 填充 协同过滤 逆最近邻 推荐录入模型
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网上成绩报送之客户端辅助程序的开发 被引量:1
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作者 郭继虎 《现代教育技术》 CSSCI 2007年第3期86-88,共3页
针对清华大学研发的“本科生综合教务管理系统”的成绩管理模块中成绩录入只能采用手工输入,已有数据无法直接导入的问题,文中提出了利用客户端辅助程序实现成绩的自动录入,并通过VB6.0的示例代码就程序设计中的登录、加载本地数据源... 针对清华大学研发的“本科生综合教务管理系统”的成绩管理模块中成绩录入只能采用手工输入,已有数据无法直接导入的问题,文中提出了利用客户端辅助程序实现成绩的自动录入,并通过VB6.0的示例代码就程序设计中的登录、加载本地数据源、解析html代码、自动填充等环节进行了详细论述。 展开更多
关键词 成绩管理 网上成绩报送 单自动填充
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成绩报送系统之客户端辅助程序的开发 被引量:1
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作者 黄锋华 郭继虎 《太原科技》 2006年第10期56-58,共3页
从VB6.0的示例代码程序设计中的登录、加载本地数据源、解析html代码、自动填充等方面进行了分析,针对“本科生综合教务管理系统”中成绩录入只能采用手工输入,已有数据无法直接导入的问题,提出了利用客户端辅助程序可实现成绩的自动录入。
关键词 成绩报送 填充 HTML
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An investigation of surface deformation after fully mechanized,solid back fill mining 被引量:23
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作者 Li Jian Zhang Jixiong +2 位作者 Huang Yanli Zhang Qiang Xu Junming 《International Journal of Mining Science and Technology》 2012年第4期453-457,共5页
The surface deformation after fully mechanized back filling mining was analyzed.The surface deformation for different backfill materials was predicted by an equivalent mining height model and numerical simulations.The... The surface deformation after fully mechanized back filling mining was analyzed.The surface deformation for different backfill materials was predicted by an equivalent mining height model and numerical simulations.The results suggest that:(1) As the elastic modulus,E,of the backfill material increases the surface subsidence decreases.The rate of subsidence decrease drops after E is larger than 5 GPa;(2) Fully mechanized back fill mining technology can effectively control surface deformation.The resulting surface deformation is within the specification grade I,which means surface maintenance is not needed.A site survey showed that the equivalent mining height model is capable of predicting and analyzing surface deformation and that the model is conservative enough for engineering safety.Finally,the significance of establishing a complete error correction system based on error analysis and correction is discussed. 展开更多
关键词 Back filling mining Back filling materials Surface deformation Equivalent mining height
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Screening of Surface Medication Agents and Modification Mechanism of Fly Ash 被引量:10
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作者 ZHANG Hong-bo WEI Lu-bin 《Journal of China University of Mining and Technology》 EI 2007年第3期341-344,共4页
The fly ash from Jixi power plant was treated with various surface modifiers. The surface properties of the modified fly ash,including active index wetting angle,were measured in this paper. The modified fly ash was f... The fly ash from Jixi power plant was treated with various surface modifiers. The surface properties of the modified fly ash,including active index wetting angle,were measured in this paper. The modified fly ash was filled into rubber to improve the rubber properties. The results of rubber tests indicate that the type of the surface modifiers has a great influence on the rubber reinforcing properties. The fly ash modified by titanate coupling agents exhibits the best performance in respect to rubber reinforcing properties. The test results show that the fly ash can take place of some decomposition material so that the dosage of decomposition in rubber can be reduced,resulting in the low producing cost of rubber and the low pollution of fly ash. 展开更多
关键词 fly ash rubber filler surface modifiers
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一种新的嵌入式系统实时多任务调度方法
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作者 张勰 龚龙庆 《微电子学与计算机》 CSCD 北大核心 2003年第B12期48-50,共3页
本文讨论了常见的几种多任务实时性处理算法的优缺点,并提出一种更能满足多任务实时性处理的算法-用含有优先权的时间片填充比特表算法。这种算法主要是把常规的比特表中的任务按照时间片进行分配,这样可以把实时性要求高的而且任务... 本文讨论了常见的几种多任务实时性处理算法的优缺点,并提出一种更能满足多任务实时性处理的算法-用含有优先权的时间片填充比特表算法。这种算法主要是把常规的比特表中的任务按照时间片进行分配,这样可以把实时性要求高的而且任务执行时间较长的任务能够很好的完成,而不影响其它实时性要求更高的任务的完成。 展开更多
关键词 嵌入式系统 多任务调度 处理算法 时间片填充比特算法 实时性 比特 实时操作系统
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The Effect of Coupling Agents on Natural Zeolite-Filled Natural Rubber 被引量:4
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作者 Wirunya Keawwattana Thiranan Thuechart Jumras Limtrakul 《Journal of Chemistry and Chemical Engineering》 2011年第5期413-422,共10页
Natural zeolite particles of 40, 80 and I00 phr were incorporated into natural rubber (NR) using a two-roll mill. The surface treatment of zeolite particles was expected to improve their cure characteristics and the... Natural zeolite particles of 40, 80 and I00 phr were incorporated into natural rubber (NR) using a two-roll mill. The surface treatment of zeolite particles was expected to improve their cure characteristics and their tensile properties. Two types of silane coupling agents, i.e., bis-[3-(triethoxysilyl)-propyl]-tetrasulfide (Coupling 89) and 3-Octanoylthio-l-propyltriethoxysilane (NXT) at various loadings of 2, 4 and 8 percent by weight (%wt) were selected. The viscosity and cure time of the rubber compound increased, while the scorch time decreased after the treatment of zeolite by both coupling agents. The viscosity of the rubber compound predominantly increased when increasing Coupling 89, however, NXT loadings showed no significant effect on the cure characteristics Moreover, the amount and type of coupling agent influenced the tensile properties of the vulcanizates, as a result of the increase in tensile strength, and tensile modulus with increasing both coupling agents loading. The tensile properties of the vulcanizates increased at low Coupling 89 concentrations (2-4%wt), but decreased at high Coupling 89 loading (8%wt). Since NXT has a less bulky structure and lower viscosity compared with Coupling 89, it thus reacts with the silanol groups on the zeolite surface more readily, resulting in the decrease in filler-filler interaction, leading to better tensile properties. 展开更多
关键词 RUBBER surface modification zeolites composites.
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Extraction of locked-up coal by strengthening of rib pillars with FRP--A comparative study through numerical modelling 被引量:5
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作者 Das Arka Jyoti Mandal Prabhat Kumar +1 位作者 Ghosh Chandra Nath Sinha Amalendu 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2017年第2期261-267,共7页
In some of the coalfields in India, coal seams are only developed but no extraction of pillars is possible due to the presence of surface or sub-surface structures and also non-availability of stowing materials which ... In some of the coalfields in India, coal seams are only developed but no extraction of pillars is possible due to the presence of surface or sub-surface structures and also non-availability of stowing materials which leads to huge amounts of coal being locked-up underground. Spontaneous heating and fire, accumulation of poisonous gases, severe stability issues leading to unsafe workings and environmental hazards are the major problems associated with the developed coal pillars. So, there is a pressing need for a technology for the mining industry to extract the huge amount of coal locked-up under different constraints. In this study, the locked-up coal is proposed to be extracted by artificially strengthening the rib pillars. The detailed comparative study is carried out to know the increase of extraction percentage of locked-up coal by strengthening the rib pillars with FRP. Extraction methodology is designed and studied through numerical modelling for its stability analysis to evaluate its suitability of application in underground. 展开更多
关键词 Locked-up coal Confined core Yield criterion Strengthened rib pillar Strain softening
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Green House in Semi-arid Regions of Mexico
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作者 Maria de los Angeles Rechy Carvajal Emil von Roth Jose Alberto Murillo Rodriguez 《Journal of Environmental Science and Engineering(B)》 2016年第5期224-227,共4页
The subject structure was consisted of a proto-type house with plan dimensions of 8 m ×4 m. A variety of materials was used to the construction, with special emphasis on using environmentally friendly non-toxic m... The subject structure was consisted of a proto-type house with plan dimensions of 8 m ×4 m. A variety of materials was used to the construction, with special emphasis on using environmentally friendly non-toxic materials. The structure's core consisted of reinforced concrete frames with masonry infill walls. Inside faces of the walls and the roof's outside face were covered with proprietary composite panels, which are manufactured with a mixture of cement, volcanic ash, and local sawmill waste. These panels were analyzed for their physical and chemical properties, as well as for their resistance to decay and insects when subjected to extreme conditions for 15 years. The panels have also shown to provide thermal insulation and nonflammable when in direct contact with fire. The roof surface was further covered with a blend of local drought-resistant succulents and cacti. This study provides a detailed review of the construction process and materials employed. 展开更多
关键词 Prototype house thermal insulation non-combustible resistant to decay.
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