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基于预训练模型的问答系统设计
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作者 许诚 程强 +1 位作者 白金辉 卢坤 《舰船电子工程》 2024年第8期135-139,共5页
旨在基于spaCy基础预训练模型设计一个军事领域问答系统。首先,引入了一种实体识别的方法,利用义原相似度评估的方法对该模型进行扩展和微调。随后,探讨了把匹配器(Matcher)组件添加进spaCy管道并结合Adam神经网络优化器进行实体关系提... 旨在基于spaCy基础预训练模型设计一个军事领域问答系统。首先,引入了一种实体识别的方法,利用义原相似度评估的方法对该模型进行扩展和微调。随后,探讨了把匹配器(Matcher)组件添加进spaCy管道并结合Adam神经网络优化器进行实体关系提取的方法。经验证,上述方法在特定领域对实体和实体关系的识别度比spaCy基础预训练模型有所提升,较好解决了军事领域标记预料不足的问题,为军事领域问答系统的开发与应用提供了可靠的借鉴。 展开更多
关键词 spaCy 预训练模型 实体识别 义原相似度 MATCHER
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基于改进ORB算法的航拍图像匹配 被引量:2
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作者 葛继空 杨静 +1 位作者 张东 任军 《北京测绘》 2020年第11期1539-1543,共5页
基于特征点的图像匹配方法是无人机航拍图像匹配中最为重要的一类算法。针对常用航拍图像匹配算法效率较低、鲁棒性较差等问题,提出一种改进ORB算法。首先构建高斯尺度空间,然后使用FAST算法检测特征点,再利用三元组算法构建二进制描述... 基于特征点的图像匹配方法是无人机航拍图像匹配中最为重要的一类算法。针对常用航拍图像匹配算法效率较低、鲁棒性较差等问题,提出一种改进ORB算法。首先构建高斯尺度空间,然后使用FAST算法检测特征点,再利用三元组算法构建二进制描述符,最后借助Opencv库中的BFMatcher()函数完成匹配。经实验表明:与原ORB算法相比,正确匹配率提高10%左右,运行效率提高大约17%,可适用于对稳定性和效率要求较高的航拍场景中。 展开更多
关键词 ORB算法 航拍图像匹配 OPENCV 三元组算法 BF Matcher函数
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Java中的正则表达式与模式匹配研究 被引量:1
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作者 武兴睿 《科技传播》 2011年第15期180-180,186,共2页
正则表达式是代表具有特殊意义字符的字符串。在信息时代,我们从海量数据中寻找特定的信息时,正则表达式起到了至关重要的作用。正则表达式仿佛一个模板,将某个字符模式与所搜索的字符串进行匹配。在编写程序时正则表达式也起着很重要... 正则表达式是代表具有特殊意义字符的字符串。在信息时代,我们从海量数据中寻找特定的信息时,正则表达式起到了至关重要的作用。正则表达式仿佛一个模板,将某个字符模式与所搜索的字符串进行匹配。在编写程序时正则表达式也起着很重要的作用,应用广泛。本文主要研究java中正则表达式的使用,及模式匹配。 展开更多
关键词 正则表达式 模式匹配 Pattern类 Matcher类
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EXPLORATION IN UNKNOWN ENVIRONMENTS BY A MOBILE ROBOT
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作者 熊宁 邵世煌 《Journal of China Textile University(English Edition)》 EI CAS 1995年第1期14-20,共7页
Navigation of anutonomous mobile robots in known environments has been studied extensively. But the algorithms for controlling progress through unknown environments have not received much study. In this paper, we put ... Navigation of anutonomous mobile robots in known environments has been studied extensively. But the algorithms for controlling progress through unknown environments have not received much study. In this paper, we put forward a new exploration scheme which is based on learning. While travelling, robots use their range/vision sensors to perceive the external world. Newly acquired information about obstacles is added to the system’s knowledge base through learning. And the updated knowledge base is used in planning future navigation paths, thus the generated paths will improve gradually. 展开更多
关键词 robot NAVIGATION learning matcher merger mobile robot.
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Architectural Benevolent Builders (ABB): A global system automating integration of structured and semistructured sources
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作者 徐晓飞 邓胜春 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2003年第1期93-98,共6页
We investigate highly sophisticated mechanisms that merge and automate interoperability of heterogeneous traditional information systems together with the World Wide Web as one world. In particular, we introduce the A... We investigate highly sophisticated mechanisms that merge and automate interoperability of heterogeneous traditional information systems together with the World Wide Web as one world. In particular, we introduce the ABB system that employs most of the Benevolent Builders (BB) which are assertions, integration rules, ABB network graph and agents to activate the components’ versatility to reconcile the semantics involved in data sharing in order to withstand the terrific dynamic computer technology in the present and future information age. The ABB is a global application system with its operation covering local databases to the Internet. The first three BB are passive objects, whereas, the agent has a strong versatility to perceive events, perform actions, communicate, make commitments, and satisfy claims. Due to the BB’s power of intelligence, ABB also has the capability to filter out and process only the relevant operational sources like preferences (i.e. customer’s interest) from the sites. The ABB’s richness in knowledge and flexibility to accommodate various data models, manages to link: system to system or firm to firm regardless of the field such as: engineering, insurance, medical, space science, and education, to mention a few. 展开更多
关键词 benevolent builders automation agents agent matcher PP builder TIT Integrator
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An integrated heterogeneous web service retrieval via combination of instance-and metadata-based schema matching method
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作者 Jie HE Wei WANG 《Geo-Spatial Information Science》 SCIE CSCD 2015年第2期111-123,共13页
Schema matching is a critical step in the integration of heterogeneous web service,which contains various types of web services and multi-version services of the same type.Mapping loss or mismatch usually occurs due t... Schema matching is a critical step in the integration of heterogeneous web service,which contains various types of web services and multi-version services of the same type.Mapping loss or mismatch usually occurs due to schema differences in structure and content and the variety in concept definition and organization.Current instance schema matching methods are not mature enough for heterogeneous web service because they cannot deal with the instance data in web service domain and capture all the semantics,especially metadata semantics.The metadata-based and the instance-based matching methods,in the case of being employed individually,are not efficient to determine the concept relationships,which are crucial for finding high-quality matches between schema attributes.In this paper,we propose an improved schema matching method,based on the combination of instance and metadata(CIM)matcher.The main method of our approach is to utilize schema structure,element labels,and the corresponding instance data information.The matching process is divided into two phases.In the first phase,the metadata-based matchers are used to compute the element label similarity of multi-version open geospatial consortium web service schema,and the generated matching results are raw mappings,which will be reused in the next instance matching phase.In the second phase,the designed instance matching algorithms are employed to the instance data of the raw mappings and fine mappings are generated.Finally,the raw mappings and the fine mappings are combined,and the final mappings are obtained.Our experiments are executed on different versions of web coverage service and web feature service instance data deployed in Geoserver.The results indicate that,the CIM method can obtain more accurate matching results and is flexible enough to handle the web service instance data. 展开更多
关键词 schema matching web coverage service(WCS) metadata-based matcher instance-based matcher web feature service(WFS)
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Study of influence of radial matcher section end shape on RFQ cavity frequency
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作者 张周礼 何源 +5 位作者 张斌 李德润 石爱民 潘刚 杜小楠 孙列鹏 《Chinese Physics C》 SCIE CAS CSCD 2014年第7期127-129,共3页
To investigate the feasibility of using a form cutter to machine the Radial Matcher Section (RMS) of tile Radio Frequency Quadrupole (RFQ) for the Accelerator Driven System (ADS) project at Institute of Modern P... To investigate the feasibility of using a form cutter to machine the Radial Matcher Section (RMS) of tile Radio Frequency Quadrupole (RFQ) for the Accelerator Driven System (ADS) project at Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS), the influence of RMS end shape on the RFQ cavity frequency is studied. The results indicate that using a form cutter to machine the RMS of an RFQ will indeed influence the cavity frequency. The RMS end shape will give more influence to a shorter RFQ cavity. For the 4.2 m ADS RFQ, the influence is negligible, which means that a form cutter can be used to machine the RMS. 展开更多
关键词 ADS project form cutter radial matcher section test module
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