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Tree Automata for Extracting Consensus from Partial Replicas of a Structured Document
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作者 Maurice Tchoupé Tchendji Milliam M. Zekeng Ndadji 《Journal of Software Engineering and Applications》 2017年第5期432-456,共25页
In an asynchronous cooperative editing workflow of a structured document, each of the co-authors receives in the different phases of the editing process, a copy of the document to insert its contribution. For confiden... In an asynchronous cooperative editing workflow of a structured document, each of the co-authors receives in the different phases of the editing process, a copy of the document to insert its contribution. For confidentiality reasons, this copy may be only a partial replica containing only parts of the (global) document which are of demonstrated interest for the considered co-author. Note that some parts may be a demonstrated interest over a co-author;they will therefore be accessible concurrently. When it’s synchronization time (e.g. at the end of an asynchronous editing phase of the process), we want to merge all contributions of all authors in a single document. Due to the asynchronism of edition and to the potential existence of the document parts offering concurrent access, conflicts may arise and make partial replicas unmergeable in their entirety: they are inconsistent, meaning that they contain conflictual parts. The purpose of this paper is to propose a merging approach said by consensus of such partial replicas using tree automata. Specifically, from the partial replicas updates, we build a tree automaton that accepts exactly the consensus documents. These documents are the maximum prefixes containing no conflict of partial replicas merged. 展开更多
关键词 Structured DOCUMENTS Workflow of Cooperative Edition MERGING partial replicas CONFLICT CONSENSUS Tree AUTOMATA AUTOMATA Product Lazy Evaluation
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移动云环境下的实时协同编程机制及策略研究 被引量:3
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作者 高丽萍 赵春芽 《小型微型计算机系统》 CSCD 北大核心 2020年第3期511-518,共8页
随着云服务理念的普及,移动云环境不仅为我们提供安全稳定和高效的信息服务,也为我们的协同交互任务带来了很大挑战,传统的一致性维护算法在移动云环境下不能够很好地扩展.实时协同编程研究是协同设计的重要方向,传统的方式一般是在版... 随着云服务理念的普及,移动云环境不仅为我们提供安全稳定和高效的信息服务,也为我们的协同交互任务带来了很大挑战,传统的一致性维护算法在移动云环境下不能够很好地扩展.实时协同编程研究是协同设计的重要方向,传统的方式一般是在版本控制和加锁状态下,数据采用全复制的模式,在实际云环境状态下,这种方式不能够保证高的响应性和扩展性.这篇论文是在移动云环境下根据共享锁的一些结论,根据代码节点之间的关系,采用基于依赖节点的部分复制的方案,考虑到移动云环境下的不同体系结构,客户端资源有限性,效率和扩展性等方面,提出了适合移动云环境下的无冲突的并发控制算法和操作转换,使用这种方式,用户可以实时高效的编程.并采用Vaadin框架设计了一个基于浏览器的实时协作编辑系统(CloudCode),可为客户端提供意识支持,并证明了算法的可行性和有效性,最终显示了该设计理念更符合用户的意愿. 展开更多
关键词 一致性维护 分布式环境 部分复制 操作转换
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多孔陶瓷的制备方法及研究现状 被引量:18
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作者 袁绮 谭划 +7 位作者 杨廷旺 陆文龙 臧佳栋 李浩宇 鄢文超 张升伟 卢亚 张海波 《硅酸盐通报》 CAS 北大核心 2021年第8期2687-2701,共15页
近年来,多孔陶瓷材料在保温、气体过滤、催化载体、分离膜、窑具、骨和牙齿的生物医学替代品,以及传感器材料等领域应用越来越广泛。针对多孔陶瓷制备工艺和性能的研究呈现快速发展的趋势,并取得了大量的研究成果。本文以多孔陶瓷的制... 近年来,多孔陶瓷材料在保温、气体过滤、催化载体、分离膜、窑具、骨和牙齿的生物医学替代品,以及传感器材料等领域应用越来越广泛。针对多孔陶瓷制备工艺和性能的研究呈现快速发展的趋势,并取得了大量的研究成果。本文以多孔陶瓷的制备工艺为主线,综述了部分烧结法、牺牲模板法、复制模板法、直接发泡法和3D打印法等5种主要多孔陶瓷制备方法的发展现状与研究成果。同时也探讨了各种方法的优缺点以及未来的发展方向,为多孔陶瓷的进一步发展提供了指导和参考。 展开更多
关键词 多孔陶瓷 部分烧结法 牺牲模板法 复制模板法 直接发泡法 3D打印法
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A Stable and Consistent Document Model Suitable for Asynchronous Cooperative Edition
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作者 Maurice Tchoupé Tchendji Rodrigue D. Djeumen Marcellin T. Atemkeng 《Journal of Computer and Communications》 2017年第8期69-82,共14页
Complex structured documents can be intentionally represented as a tree structure decorated with attributes. Ignoring attributes (these are related to semantic aspects that can be treated separately from purely struct... Complex structured documents can be intentionally represented as a tree structure decorated with attributes. Ignoring attributes (these are related to semantic aspects that can be treated separately from purely structural aspects which interest us here), in the context of a cooperative edition, legal structures are characterized by a document model (an abstract grammar) and each intentional representation can be manipulated independently and eventually asynchronously by several co-authors through various editing tools that operate on its “partial replicas”. For unsynchronized edition of a partial replica, considered co-author must have a syntactic document local model that constraints him to ensure minimum consistency of local representation that handles with respect to the global model. This consistency is synonymous with the existence of one or more (global) intentional representations towards the global model, assuming the current local representation as her/their partial replica. The purpose of this paper is to present the grammatical structures which are grammars that permit not only to specify a (global) model for documents published in a cooperative manner, but also to derive automatically via a so call projection operation, consistent (local) models for each co-authors involved in the cooperative edition. We also show some properties that meet these grammatical structures. 展开更多
关键词 STRUCTURED DOCUMENTS DOCUMENTS Models GRAMMARS Cooperative EDITION STRUCTURED EDITION Projections VIEWS partial replicas
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