【摘 要】
：
In 2008,Blockchain was introduced to the world as the underlying technology of the Bitcoin system.After more than a decade of development,various Blockchain sys
【机 构】
：
College of Computer,National University of Defense Technology,Changsha 410073,China;Key Laboratory o
论文部分内容阅读
In 2008,Blockchain was introduced to the world as the underlying technology of the Bitcoin system.After more than a decade of development,various Blockchain systems have been proposed by both academia and industry.This paper focuses on the consensus algorithm,which is one of the core technologies of Blockchain.In this paper,we propose a unified consensus algorithm process model that is suitable for Blockchains based on both the chain and directed acyclic graph(DAG)structure.Subsequently,we analyze various mainstream Blockchain consensus algorithms and classify them according to their design in different phases of the process model.Additionally,we present an evaluation framework of Blockchain consensus algorithms and then discuss the security design principles that enable resistance from different attacks.Finally,we provide some suggestions for selecting consensus algorithms in different Blockchain application scenarios.
其他文献
服务治理是新发展态势下中国特色社会工作建设的重要命题。它疏解服务对象困境,进行人力资本投资,输人正面积极能量,协助人境动态平衡,践行人文关怀协助,因此成为党和政府进行国家治理、人民群众走向美好生活的有效载体。与域外社会工作相类,社会工作中国行动可以从“助人自助”和“促境美好”两个角度展开。
The three-body problem can be traced back to Newton in 1687,but it is still an open question today.Note that only a few periodic orbits of three-body systems we
A general framework to tackle the problem of few-shot learning is meta-learning, which aims to train a well-generalized meta-learner(or backbone network) to learn a base-learner for each future task w
Power electronics,processing over 50％of world's electric energy,enables very efficient electric energy conversion for a wide range of applications such as electr
海曙区作为浙江省宁波市中心城区,区域优势明显,社会治理基础好,社会工作起步较早。在社工站整体建设过程中,海曙区按照“—镇街一特色、一镇街一品牌”的发展思路,探索出独具特色的乡镇(街道)社工站发展道路。致力服务,多样化发展因地制宜定方向。结合海曙实际,全区社工站建设在原有社区社会工作室的基础上,将全区乡镇(街道)社工站定位为专业服务提供、人才培养交流、资源整合链接、参与基层治理的综合服务平台。
2021年3月11日,民政部发布了《儿童福利机构社会工作服务规范》(以下简称《服务规范》)作为指导我国下一阶段儿童福利机构优化提质的行业标准。本规范共包含九个章节和24个制式表格,它首次在我国政策领域全面阐释了院内儿童社会工作的职责定位、服务内容和具体流程,系统回答了儿童社会工作“是什么”“做什么”和“如何做”等三大基础性问题。在我国积极构建区域性养育中心并推动基层儿童福利机构转型升级的今天,《服务规范》具有重要的引领价值。
Iterative methods are used to simulate the in vitro feedforward neural networks in physiological experiments.Emissivity can be propagated to a minimum of ten gr
湖南省长沙市望城区,是伟大的共产主义战士雷锋同志的故乡.近两年,随着湖南省乡镇(街道)社工站建设工作的推进,望城区培育了一支本土化的专业社会工作队伍.上岗至今的800多个
近日,浙江省温州市鹿城区松台街道水心怀老站正式投入使用.水心怀老站是浙江安福利生慈善基金会为解决社区老人居家养老难题建设的平台,为社区老人提供养老设施、文体娱乐、