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Research on Intelligent Organization and Application of Multi-source Heterogeneous Knowledge Resources for Energy Internet

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Data Intelligence 2023年第1期5卷 75-99页

作者： Yuxuan Wang liqun Luo guangjian li Department of Information Management Peking UniversityHaidian DistrictBeijing 100871China

To improve the informationization and intelligence of the energy Internet industry and enhance the capability of knowledge services,it is necessary to organize the energy Internet body of knowledge from existing knowledge resources of the State Grid,which have the characteristics of large scale,multiple sources,and *** the same time,the business fields of State Grid cover a wide *** are many sub-fields under each business field,and the relationship between fields is diverse and *** key to establishing the energy Internet body of knowledge is how to fuse the heterogeneous knowledge resources from multiple sources,extract the knowledge contents from them,and organize the different *** paper considers transforming the original knowledge resources of State Grid into a unified and wellorganized knowledge system described in OWL language to meet the requirements of heterogeneous resource integration,multi-source resource organization,and knowledge service *** the State Grid knowledge resources mainly in XML format,this paper proposes a Knowledge Automatic Fusion and Organization idea and method based on XSD Directed *** to the method,the XML corresponding XSD documents are transformed into a directed graph in the first stage during which the graph neural network detects hidden knowledge inside the structure to add semantic information to the *** the second stage,for other structured knowledge resources(e.g.,databases,spreadsheets),the knowledge contents and the relationships are analyzed manually to establish the mappings from structured resources to graph structures,using which the original knowledge resources are transformed into graph structures,and merged with the directed graphs obtained in the first stage to achieve the fusion of heterogeneous knowledge *** expert knowledge is introduced for heterogeneous knowledge fusion to further extend the directed *** in the third stage,the e

关键词： Energy internet Knowledge resources Body of knowledge Intelligent knowledge organization

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Extraction of Alpha transmitter signals from single-station observations using the direction-finding method

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Science China(Technological Sciences) 2022年第8期65卷 1727-1737页

作者： GU XuDong CHEN Huan WANG ShiWei LU ZiLong NI BinBin li guangjian CHENG Wen Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072China

For the applications of Alpha very-low-frequency(VLF) systems consisting of multiple transmitters, determining the origin transmitter station of received signals is a crucial problem. Based on single-station observations, this study develops a directionfinding method to extract Russian Alpha transmitter signals. First, the amplitudes of Alpha signals received in Suizhou City,Hubei Province(31.57°N, 113.32°E) in the east-west(EW) and north-south(NS) directions are obtained by the power spectrum method. The amplitude ratios of signals in the two directions are subsequently adopted to estimate the propagation angles of the signals with respect to the NS direction of the VLF receiver station. Phase ambiguity in our system is eliminated by comparing Alpha signal waveform with that from the VTX transmitter in India(8.39°N, 77.75°E) as a reference station. Finally, we can determine the quadrant where the incoming wave signals are located relative to the receiver and eventually distinguish the exact Alpha transmitters. Based on the direction-finding results, the amplitudes of each Alpha signal are extracted, and their diurnal variation features are analyzed to verify the performance of our method. These results are of great significance for the further study of Alpha signals and VLF long-distance communication.

关键词： very low frequency signal alpha transmitter direction-finding method single-station observation

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The efficacy and safety of endovascular recanalization of occluded large cerebral arteries during the subacute phase of cerebral infarction:a case series report

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Stroke & Vascular Neurology 2017年第3期2卷 124-131页

作者： Kangning Chen Xianhua Hou Zhenhua Zhou guangjian li Qu liu li Gui Jun Hu Shugui Shi Department of Neurology Southwest HospitalThird Military Medical UniversityChongqingChina

background Intravenous tissue plasminogen activator with or without mechanical thrombectomy during the acute phase are approved therapies for ischaemic *** to the short treatment time window(lizationof their occluded artery in the subacute *** this retrospective study,we have examined the efficacy and safety in patients who have received either percutaneous transluminal angioplasty(PTA)or percutaneous transluminal angioplasty and stenting(PTAS)for IAO in the subacute phase of their *** Patients with subacute symptomatic ischaemic stroke caused by IAO were assessed to identify the responsible artery and low perfusion areas by CT angiography,MR angiography or digital subtraction *** eligible patients,a PTA or PTAS was performed to reopen the occluded *** antithrombotic therapy,use of statins,control of risk factors and rehabilitation therapy were prescribed after the *** patients had regular follow-up up to 12 *** PTA or PTAS was performed in 16 patients with cerebral infarction caused by IAO in the subacute *** the procedure,12 cases were recanalized,two were partially recanalized and two failed to *** patient with left C6 segment occlusion of the carotid artery had a central retinal artery embolism after *** perioperative adverse events were 6.25%.At 3 months,the distribution of modified Rankin scale scores was 0(seven cases),1(three cases),2(five cases)and 3(one case).conclusion Selective PTA or PTAS could be performed in ischaemic stroke patients with a small infarct size and large area of hypoperfusion from an occluded large cerebral artery after the acute *** may improve neurological dysfunction and reduce the incidence of disability.

关键词： cerebral subacute infarction

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Progress in computational intelligence analysis

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Journal of library Science in China 2019年 163-164页

作者： li guangjian LUO liqun 不详

In the 21st century,with the wide application of network technology and the rise of big data ideas and methods,intelligence analysis has gradually evolved from simple quantitative analysis to computational analysis in theory and *** intelligence analysis(CIA)is gradually taking *** development process of CIA can be divided into three stages:the empirical counting analysis stage.

关键词： Progress analysis intelligence

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On computational information analysis

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Journal of library Science in China 2018年 169-170页

作者： li guangjian JIANG Xinyu 不详

Due to the impact of the big data environment and the fourth paradigm of scientific research,the trend of computability in information analysis has become more ***,as information equipment becomes cheaper,the cost of ... 详细信息

关键词： CIA On computational information analysis

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The effects of circadian clock gene in lateral habenula on depression

The effects of circadian clock gene in lateral habenula on d...

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中国睡眠研究会第十届全国学术年会

作者： li Yang li guangjian Zhao Hua Jilin Univerisity

＜正＞Aims:Depression patients are often accompanied by thythm disorders, and rhythm disorders often lead to more severe depressive symptoms. The previous study of us found that the lateral habenula is the key brain a...

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基于深度学习的科技文献知识单元抽取研究综述

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数据分析与知识发现 2023年第7期7卷 1-17页

作者：李广建袁钺北京大学信息管理系北京100871

【目的】调研国内外使用深度学习技术抽取科技文献知识单元的相关研究成果。【文献范围】以“知识单元”“深度学习”等为关键词在Web of Science、Google Scholar和CNKI等数据库进行文献检索,人工整理筛选得到71篇具有代表性的文献进... 详细信息

【目的】调研国内外使用深度学习技术抽取科技文献知识单元的相关研究成果。【文献范围】以“知识单元”“深度学习”等为关键词在Web of Science、Google Scholar和CNKI等数据库进行文献检索,人工整理筛选得到71篇具有代表性的文献进行综述。【方法】梳理科技文献知识单元的相关概念并总结科技文献知识单元的特点,从科技文献知识单元特点出发,归纳基于深度学习技术的科技文献知识单元抽取的研究成果。【结果】目前使用的抽取方法,在本质上都是基于词粒度知识单元或句粒度知识单元。科技文献知识单元抽取过程中的深度学习过程实际上是对词粒度知识单元和句粒度知识单元所具有的不同特点进行学习和捕获,这也是使用深度学习方法抽取科技文献知识单元的关键。【局限】以筛选得到的样本文献为基础进行综述,未能全面反映本领域的成果。【结论】深度学习技术在知识单元抽取中的应用提高了抽取的准确性、覆盖性和鲁棒性,未来的相关研究不仅要考虑科技文献的文本结构化信息,更需要理解其内部知识内容和内在逻辑。

关键词：知识单元知识单元抽取科技文献深度学习

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Circadain rhythmicity and behavioral depression

Circadain rhythmicity and behavioral depression

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中国睡眠研究会第十一届全国学术年会

作者： Yang li guangjian li Zhigong Zhao Hua Zhao Jilin University First Hospital of Jilin University

Background The suprachiasmatic nuclei（SCN） of the anterior hypothalamus serve as the major pacemaker for generating circadian（daily） rhythms in mammals. However, some circadian oscillators of varying strength also exist in the other brain regions in addition to the SCN. One of such structures with rhythmic property is habenular（Hb）, which showed circadian rhythmicity with baseline firing rates and expression of Period 2 gene（Per2） and protein, a key clock gene in the mammals. The habenula is implicated in a broad array of functions, such as stress, reward, cognition, sleep and wakefulness, pain, which are regulated on circadian basis. These dysfunction are associated with the onset of depression. The role of habenula in incidence of depression and regulation of circadian rhythmicity has recently attracted much attention. And the pathogenesis of depression is closely related to circadian rhythm disorder. Thus we further examined whether there is the change of circadian genes（Per2） expression in the lateral habenular（LHb） of depressed rats and how rats behavior change after downregultion of the expression of Per2. Aims The circadian expression of mRNA of Per2 expression and further exam the function of Per2 in habenula. Methods The mRNA expression of Per2 in habenula were detected by real-time PCR. We used sucrose preference test（SPT） and the forced swimming test（FST） to observe behavioral changes at different time points of normal and depressive rats. SiRNA were used to downregulate the expression of Per2, then dectected the behavior changes of rats. Results The FST showed circadian oscillation both in normal and depressive rats, but sugar water preference rate and climbing time are lower at night in depression rats than in normal rats, which lead to a reduced amplitude of oscillation for sugar water preference rate and climbing time in depression rats, comparing with normal rats. We further showed that the expression of Per2 mRNA and protein in the LHb of depression

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面向信息机构的嵌入式NSTL资源集成服务系统的设计与实现

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现代图书情报技术 2009年第6期 2-7页

作者：李广建北京大学信息管理系北京100871

介绍面向信息机构的嵌入式NSTL资源集成服务系统的相关背景,给出系统的设计方案、体系结构及主要功能,并从资源整合、服务整合以及分布式知识库管理三个方面概述系统的关键实现技术,最后简要说明系统在试点单位的应用情况。

关键词：集成服务系统设计资源整合服务整合

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整合研究的几个理论问题

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图书情报工作 2005年第10期49卷 5-10页

作者：李广建北京师范大学管理学院北京100875

探讨国外整合研究的几个理论问题。将国外整合研究概括为面向信息资源组织的整合、面向异构数据源的数据整合以及面向应用的整合三个阶段。总结国外有关整合类型与层次的二分法、三分法和四分法。概要介绍整合的GAV模式。 LAV模式、GLAV... 详细信息

探讨国外整合研究的几个理论问题。将国外整合研究概括为面向信息资源组织的整合、面向异构数据源的数据整合以及面向应用的整合三个阶段。总结国外有关整合类型与层次的二分法、三分法和四分法。概要介绍整合的GAV模式。 LAV模式、GLAV和BAV模式以及P2P模式,最后分析整合系统的通用体系结构。

关键词：整合概念整合类型整合模式整合系统的体系结构

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