排序方式： 共有96条查询结果，搜索用时 15 毫秒
31.
[目的/意义]当前数字图书馆系统数字资源可信性、互操作性及可扩展性等成为阻碍数字图书馆发展的主要问题。[方法/过程]基于区块链技术提出一种新型分层数字图书馆体系架构,并详细介绍各层的关键功能组件和核心服务模块,最后与已有相关数字图书馆体系架构进行综合比较。[结果/结论]理论分析表明,所提架构利用区块链技术的分布式账本结构、安全可靠、透明可信、时序不可篡改等特征能有效解决数字图书馆数字资源可信性,增强系统架构的互操作性及可扩展性,实现异构数字资源的安全流通。 相似文献
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Petar Jandrić 《Educational Philosophy and Theory》2020,52(14):1470-1482
AbstractCritical pedagogy is in crisis. To address this crisis, this paper reinvents Paulo Freire’s concept of utopia in and for our age of the Anthropocene. Understood as a system, postdigital critical utopia provides us with normative foundations and returns agency from invisible data and algorithms to human beings. Understood as a process, postdigital critical utopia unmasks the myth of neutrality and adds an important element of myth, religion, ritual, and faith. Understood as an orientation, postdigital critical utopia needs to be balanced by dystopia, integrate environmental considerations, and act with a combination of epistemical curiosity and hope. Theoretical and practical attempts at introducing advanced technology to reimagine new utopias now take place in media theory, hacking, activism, and small pockets of the academia. To transcend its own crisis and remain relevant, contemporary critical pedagogy movement must urgently join these attempts. However, catching up with technological development is only the tip of a much larger iceberg. In order to take the lead in processes of modernization, critical pedagogy movement needs to actively develop utopian visions and techno-administrative systems which may support these visions. 相似文献
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国内区块链研究起步于2014年,近年来取得了丰富的研究成果。以CNKI收录的近5年国内区块链文献为研究对象,采用文献计量方法,采用Excel、EndNote、VosViewer软件,从文献数量、载文期刊、核心作者、关键词4个维度对国内学者在区块链领域所从事研究的结构特征与研究热点进行探析。结果表明,现有学者大多是对区块链技术的应用可行性进行阐述,很少有学者对区块链在各领域实际应用的具体实现方法进行论述。通过对国内区块链领域发展历程的综述,可协助相关研究者探索新的研究领域。 相似文献
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Higher education systems in low-income countries are usually fragile and sensitive to the surrounding political and economic environment. This environment poses various problems for students, graduates, and universities with regard to issuance and verification of academic records management. The process of verification and accreditation of certificates is long and costly for both students and universities.This study endeavors to address these problems by introducing an innovative solution based on blockchain technology. We propose establishing a national hybrid blockchain-based platform that brings together all possible stakeholders in the field of higher education, including students, universities, government agencies, policymakers, and companies from the business sector. This study evaluates the costs and benefits from establishing this platform and investigates the possible commercialization of its contracts. Furthermore, we test the feasibility of this platform in two of the most instable low-income countries: Syria and Sudan. We find that this platform is feasible and can serve as a marketplace for all stakeholders in the higher education system and would increase the internationalization of higher education. The establishment of this platform will ensure inclusive and equitable education and promotes lifelong learning opportunities for students from low-income countries and thus meets the fourth goal of Sustainable Development. 相似文献
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党的十八大以来,学生体质健康测试被提到了新的高度,但当前的测试系统在数据存证、数据共享和监管追溯等方面均存在缺陷。习近平总书记将区块链列为新一代信息技术的代表,研究以学生体质健康测试区块链为研究对象,从平台架构、应用前景与现实挑战三个向度进行分析。研究发现:在"省级-地级-县级"的三级结构下,学生体质健康测试区块链可以优化测试结果的上传、录入和获取流程,从而实现数据的真实测量、个性分析和精准干预;学生体质健康测试区块链去中介化和去中心化的内在价值,使其在监测中心、政企合作和健康档案领域具有广阔的应用前景;学生体质健康测试区块链在理念、制度和技术上仍面临着较大挑战,但可以从矫正利害相关者的关注点、保障监测中心的自主权和引进高素质的技术人才三个方面来积极应对。 相似文献
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在新时期背景下,为促进加快数据安全研究、加强数据安全治理,以中国知网数据库和Web of Science核心合集数据库为年样本数据来源,运用CiteSpace可视化软件,以关键词共现分析和突现词分析等方法剖析国内外数据安全研究主题和前沿。研究发现,数据安全领域的研究整体上呈增长趋势,中国是发文量最大的国家;研究呈现多样化发展态势,《情报杂志》、IEEE ACCESS等期刊发表了大量相关文献,其中外文文献的研究主要集中在计算机科学和医学领域,而中文文献则主要集中在情报学、计算机科学、管理学等领域;研究主要围绕技术、法律、管理3个维度展开,个人信息、区块链、人工智能等研究主题是现阶段及未来一段时间国内外数据研究的热点与前沿。 相似文献
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Immunization is an indispensable mechanism for preventing infectious diseases in modern society, and vaccine safety is closely related to public health and national security. However, issues such as vaccine expiration and vaccine record fraud are still widespread in vaccine supply chains. Therefore, an effective management system for the supervision of vaccine supply chains is urgently required. As the next generation of core technology after the Internet, blockchain is designed to build trust mechanisms that can change current information management methods. Meanwhile, the development of machine learning technologies provides additional ways to analyze the data in information management systems. The main objective of this study is to develop a “vaccine blockchain” system based on blockchain and machine learning technologies. This vaccine blockchain system is designed to support vaccine traceability and smart contract functions, and can be used to address the problems of vaccine expiration and vaccine record fraud. Additionally, the use of machine learning models can provide valuable recommendations to immunization practitioners and recipients, allowing them to choose better immunization methods and vaccines. 相似文献
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[目的/意义]网络环境下,XML等文档内容极易被篡改,其完整性得不到保障,影响信息应用的准确性,保护分布式存储XML文档内容的完整性非常重要。[方法/过程]在区块链理论的基础上,设计了基于区块链的分布式XML存储框架,以信息隐藏理论为基础设计了内容完整性保护系统;系统将文档内容指纹嵌入文档标签中;检测过程中,系统匹配标签中的隐秘信息和被检测文档的内容指纹。[结果/结论]系统采用MD5函数和混沌序列保证嵌入算法的鲁棒性和隐秘性,嵌入的信息具有不易察觉性,并且通过实验仿真,表明设计具有较好的可行性。该系统在一定程度上能够起到保护XML分布式存储内容完整性的作用。[局限]被修改内容的定位还需要进一步完善。 相似文献
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为保持用户满意度,减轻产品运营商的迭代压力,设计网络协同创新产品迭代开发模式。首先利用区块链技术搭建网络协同创新云平台,实现信息共享以及大众参与任务完成等功能;然后组建网络协同创新团队,通过这样的模式实现快速且高质量的创新任务;最后设计网络协同创新迭代开发模式的具体路径,其中包括在此路径中进一步实施快速响应的实现路径。所建立的迭代路径可用于帮助企业提升迭代创新中迭代速度和迭代质量。 相似文献
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随着区块链技术在众多领域进行应用,越来越多的人开始注意到它的广阔前景。基于专利信息对我国区块链技术及其分支领域进行专利申请趋势、法律状态、地区分布、申请人分布在内的技术创新态势与IPC构成、技术关联、技术功效在内的研发态势分析。结果表明,我国区块链技术目前处于高速发展期,在全国呈现东强西弱的技术格局,研发主体较为分散尚未形成优势企业,技术研发重点集中在数据层与应用层的提高安全性与提高效率领域,激励层与网络层技术的专利数量不足。针对分析结论提出我国区块链技术在政府、企业、高校科研院所层面的创新路径建议。 相似文献