分类： 计算机科学 >> 计算机科学的集成理论 提交时间： 2022-11-18 合作期刊: 《数据智能（英文）》
摘要： With the rapid growth of the linked data on the Web, the quality assessment of the RDF data set becomes particularly important, especially for the quality and accessibility of the linked data. In most cases, RDF data sets are shared online, leading to a high maintenance cost for the quality assessment. This also potentially pollutes Internet data. Recently blockchain technology has shown the potential in many applications. Using the blockchain storage quality assessment results can reduce the centralization of the authority, and the quality assessment results have characteristics such as non-tampering. To this end, we propose an RDF data quality assessment model in a decentralized environment, pointing out a new dimension of RDF data quality. We use the blockchain to record the data quality assessment results and design a detailed update strategy for the quality assessment results. We have implemented a system DCQA to test and verify the feasibility of the quality assessment model. The proposed method can provide users with better cost-effective results when knowledge is independently protected.
分类： 动力与电气工程 >> 动力与电气工程其他学科 提交时间： 2022-11-16 合作期刊: 《Electrical & Electronic Engineering Research》
摘要：
It is obvious that the modern agriculture needs the support of modern finance. The agricultural credit guarantee system, is an important means to promote the financial capital into the agriculture industry, and to solve its financing difficulties and its high cost. The designing and application of agricultural guarantee digital system platform will not only be beneficial to accelerate transformation and promotion of the mode of agricultural development, but also be positive significance on the steady growth, promoting the reform, restructuring and livelihood. This paper summarizes the relevant literatures on agricultural guarantee system, designs and develops a set of agricultural guarantee digital system platform based on the application of blockchain and big data technology, and finds it achieves a lot of benefits and good effects based on the practice in China.
分类： 计算机科学 >> 计算机软件 提交时间： 2022-07-07
摘要： Intuitively there is drastic distinction between the pure decentralized block-chain systems like Defis and those that only utilizes block-chain as an enhancing technology but remains centralized with real-world business model and conventional technologies like database, application server etc. Our study explores extensively this distinction from a methodological point of view, classifies them into blockchain-complete and blockchain-partial, analyzes key features of the two types, and reveal the root cause of this distinction. We analyze the function or, in more strong words, the ultimate purpose of blockchain in the blockchain-partial systems, and present a conceptual model we named proof-chain that quite satisfactorily represented the general paradigm of blockchain in blockchain-partial systems. A universal tension between strength of proof-chain and privacy is then revealed and the zero-knowledge based proof-chain takes shape. Several case studies demonstrate the explaining power of our proof-chain methodology. We then apply proof-chain methodology to the analysis of the ecosystem of a collaborating group of blockchain-partial systems, representing the paradigm of public and private data domain whose border the proof-chain crosses. Finally, some derived guidelines from this methodology speaks usefulness of our methodology.
分类： 计算机科学 >> 计算机科学的集成理论 提交时间： 2022-11-25 合作期刊: 《数据智能（英文）》
摘要： The early concept of knowledge graph originates from the idea of the semantic Web, which aims at using structured graphs to model the knowledge of the world and record the relationships that exist between things. Currently publishing knowledge bases as open data on the Web has gained significant attention. In China, Chinese Information Processing Society of China (CIPS) launched the OpenKG in 2015 to foster the development of Chinese Open Knowledge Graphs. Unlike existing open knowledge-based programs, OpenKG chain is envisioned as a blockchain-based open knowledge infrastructure. This article introduces the first attempt at the implementation of sharing knowledge graphs on OpenKG chain, a blockchain-based trust network. We have completed the test of the underlying blockchain platform, and the on-chain test of OpenKGs data set and tool set sharing as well as fine-grained knowledge crowdsourcing at the triple level. We have also proposed novel definitions: K-Point and OpenKG Token, which can be considered to be a measurement of knowledge value and user value. 1,033 knowledge contributors have been involved in two months of testing on the blockchain, and the cumulative number of on-chain recordings triggered by real knowledge consumers has reached 550,000 with an average daily peak value of more than 10,000. For the first time, we have tested and realized on-chain sharing of knowledge at entity/triple granularity level. At present, all operations on the data sets and tool sets at OpenKG.CN, as well as the triplets at OpenBase, are recorded on the chain, and corresponding value will also be generated and assigned in a trusted mode. Via this effort, OpenKG chain looks forward to providing a more credible and traceable knowledge-sharing platform for the knowledge graph community.
分类： 数学 >> 应用数学 分类： 管理学 >> 管理工程 分类： 信息科学与系统科学 >> 信息与系统科学其他学科 提交时间： 2020-03-31
摘要： 本文的目的是建立区块链生态系统中采矿池博弈共识均衡的一般框架，特别是在区块链生态系统中，通过使用一个新的概念“共识博弈（Consensus Game）”，解释与挖掘差距（Gap Games）博弈行为相关的共识均衡存在的意义上的稳定性，这里，区块链生态系统主要是指应用2008年中本聪（Nakamoto）所提出的“工作证明”(Proof of Work) 这一关键共识，将区块链工作的费用、报酬机制和采矿权三类不同因素考虑在内的经济活动。 为了做到这一点，我们首先概述了采矿池游戏共识均衡的一般存在性是如何表述的，然后通过区块链共识框架下共识均衡的存在性来解释比特币缺口博弈 (Gap博弈) 稳定性，然后利用博弈论中矿工的利润函数作为收益，建立了一般矿业缺口博弈一致均衡的一般存在性结果。作为应用，建立了缺口博弈 (Gap博弈)一致均衡的一般存在性结果，这不仅有助于我们在区块链生态系统的一般框架下断言缺口博弈 (Gap博弈) 的一般稳定性的存在性，但也让我们能够说明在研究采矿池博弈时的一些不同现象，这些现象可能是由于采矿者的(Gap博弈)行为与嵌入比特币经济学的情景造成的。 我们对区块链生态系统挖掘缺口博弈稳定性的解释研究表明，共识均衡的概念可能对共识经济学基础理论的发展起到重要作用
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