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- 저자 : Yucong Duan (검색결과 9 건)
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Value-driven Service Matching and Bundling via a Service Value Broker
Yucong Duan,Nanjangud C Narendra,Honghao Gao,Xiaobing Sun 보안공학연구지원센터 2014 International Journal of u- and e- Service, Scienc Vol.7 No.6
Most research on service matching and composition (or bundling) has been technical in nature, viz., at the IT service level. Very little has been done on value-based service matching and bundling. By “value-based”, we mean the value added by a service over and above the basic functional requirement that the service is supposed to satisfy. Examples of value added could be lowered cost, higher performance, improved security, etc. To that end, in this paper, we present our idea of a Service Value Broker (SVB),that performs value-driven service matching and bundling. Via an approach specifying business and technical interfaces for business services and IT services respectively, we show how value can be calculated and integrated at the business layer. Further, we also show how our approach makes it possible to determine the appropriate IT services to be selected so as to provide the required value add at the business layer. We demonstrate our ideas via a realistic case study in the E-Commerce domain.
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Securing MapReduce Result Integrity via Verification-based Integrity Assurance Framework
Yongzhi Wang,Jinpeng Wei,Yucong Duan 보안공학연구지원센터 2014 International Journal of Grid and Distributed Comp Vol.7 No.6
MapReduce, a large-scale data processing paradigm, is gaining popularity. However, like other distributed computing frameworks, MapReduce suffers from the integrity assurance vulnerability: malicious workers in the MapReduce cluster could tamper with its computation result and thereby render the overall computation result inaccurate. Existing solutions are effective in defeating the malicious behavior of non-collusive workers, but are less effective in detecting collusive workers. In this paper, we propose the Verification-based Integrity Assurance Framework (VIAF). By using task replication and probabilistic result verification, VIAF can detect both non-collusive and collusive workers, even if the malicious workers dominate the environment. We have implemented VIAF on Hadoop, an open source MapReduce implementation. Our theoretical analysis and experimental result show that VIAF can achieve high job accuracy while imposing moderate performance overhead.
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Honghao Gao,Yucong Duan,Yonghua Zhu 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.6
With the increasing of Web services on Internet, services composition requests considering not only the static information compatibility, such as interface grammar and semantic, but also the structural behavior compatibility, i.e., control flow and communication protocol. However, due to the uncertainty of Internet, application failures occurred in service-based software will cause kinds of economic losses. This stochastic phenomenon has been impacted on the structural behavior which makes services composition should take the probabilistic compatibility into account. The probabilistic compatibility needs to compute the degree of compatibility for the effective performance evaluation, which has been an important issue during services collaboration. In this paper, the probabilistic interface automaton is proposed to formalize service behaviors. Then, the synchronized product model is used to the qualitative checking for verifying whether they can interact with each other or not. Third, the probabilistic compatibilities of composite service and component service are discussed for the quantitative computing. Our method provides a reference to generate the correctness and reliable services composition.
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Rediscovering Impacts of Collaboration through Workflow Analysis to Value Service Development
Chengxiang Ren,Yucong Duan,Zhangbing Zhou,Guohua Fu,Zhen Guo,Honghao Gao 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.11
Information and service economies are developing rapidly in recent years with the development of information technology and new applications. Software and service development are becoming more and more complex relating to different participants, organizations and alliances. This phenomenon has caused urgent requirements on economic and technical fusion through coordination and collaboration among stakeholders. This paper addresses the gap between business layer and technical development in roles and activities. We then propose a combination of economic value and profits and technical service development processes. We also consider value exchange under profit sharing contracts in participants' workflows. A simulation and an experiment are performed to show related impacts.
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Liang Huang,Yucong Duan,Honghao Gao,Hui Li,Caimao Li,Zhiyang Lin 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.10
Model-Driven Engineering (MDE) tries to reduce the effort spent on software development by generating codes from models. People concentrate their minds on the transformation between models and models, or between models and codes. People also concentrate on checking consistency between different models such as consistency between a class diagram and a sequence diagram and consistency between a sequence diagram and a state machine diagram. Checking relationship consistency and class redundancy in a class model is still important but ignored in recent years. This paper concentrates on relationship problems between classes in a class diagram and proposes methods of checking various relationship problems. We address the redundancy of a class’s operations and attributes. We identify a large range of the problems for class diagram. Our research is based on the relationship abstraction rules.
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Research on Probabilistic Optimization to Dynamic Composition for Service Replacement
Honghao Gao,Minjie Bian,Yucong Duan,Yonghua Zhu 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.10
A growing number of enterprises have been moving their works to encapsulate system functions, business logics and processing modules into Web service because of its flexibility and low-cost. However, service-oriented software calls for constantly adjusting its architecture in order to respond to varying user requirements and instable runtime environments. One of the most challenging issues is how to effectively implement a reconfiguration to ensure the business-critical application is trustworthy. In this paper, it proposes a method to dynamic composition for service replacement, which focuses on the probabilistic optimization to service planning of candidate compositions when the service failure is occurred. First, the input and output data specification is defined to describe interface behaviors, and then the probabilistic solution graph is introduced to formalize replacement strategies. Second, corresponding algorithms are discussed for optimization selection purpose, which includes reliability calculation process and model modification process. The former computes the probability value of each service planning generated from probabilistic solution graph. The latter modifies probabilistic solution graph model to recommend Top-k solutions, pruning the service planning which does not satisfy the specified probability value. Third, the architecture of prototype is presented to demonstrate the feasibility of the proposed method. Our method provides a reference to guarantee the reliability of service process in E-commerce.
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