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A Service Composition Approach Based on Sequence Mining for Migrating E-learning legacy system to SOA

International Journal of Automation and computing 2010年第4期7卷 584-595页

作者： Zhuo Zhang Dong-Dai Zhou Hong-Ji Yang Shao-Chun Zhong Software School in Northeast Normal University Changchun 130024 PRC Software Technology Research Laboratory De Montfort University Leicester LE1 9BH UK Institute of Ideal Information and Technology in Northeast Normal University Changchun 130024 PRC Engineering Research Center of E-Learning Technologies Ministry of Education Changchun 130024 PRC

With the fast development of business logic and information technology, today＇s best solutions are tomorrow＇s legacy systems. In China, the situation in the education domain follows the same path. Currently, there exists a number of e-learning legacy assets with accumulated practical business experience, such as program resource, usage behaviour data resource, and so on. In order to use these legacy assets adequately and efficiently, we should not only utilize the explicit assets but also discover the hidden assets. The usage behaviour data resource is the set of practical operation sequences requested by all users. The hidden patterns in this data resource will provide users＇ practical experiences, which can benefit the service composition in service-oriented architecture （SOA） migration. Namely, these discovered patterns will be the candidate composite services （coarse-grained） in SOA systems. Although data mining techniques have been used for software engineering tasks, little is known about how they can be used for service composition of migrating an e-learning legacy system （MELS） to SOA. In this paper, we propose a service composition approach based on sequence mining techniques for MELS. Composite services found by this approach will be the complementation of business logic analysis results of MELS. The core of this approach is to develop an appropriate sequence mining algorithm for mining related data collected from an e-learning legacy system. According to the features of execution trace data on usage behaviour from this e-learning legacy system and needs of further pattern analysis, we propose a sequential mining algorithm to mine this kind of data of tile legacy system. For validation, this approach has been applied to the corresponding real data, which was collected from the e-learning legacy system; meanwhile, some investigation questionnaires were set up to collect satisfaction data. The investigation result is 90% the same with the result obtained thr

关键词： Service composition e-learning sequence mining algorithm service-oriented architecture (SOA) legacy system

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Usng Middleware to Migrate legacy system:A Case Study

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High Technology Letters 2003年第4期9卷 91-93页

作者：邢大红 Liu Zongtian Xu Dong Yang Xuejun Research Institute of Microcomputer Hefei University of Technology Hefei 230009P.R.China School of Computer Shanghai University Shanghai 200072P.R.China Anhui Branch of China Construction Bank Hefe 230009P.R.China

There has been an increasing need to migrate legacy systems to new hardware technologies and software development paradigms because the legacy systems present problems such as low effectiveness and high maintenance. If organizations want to remain competitive in today’s fast changing business and technological environment, they must overcome these problems. Middleware is a valuable technology in that it provides convenient methods to construct system infrastructure, so it can be used to migrate the legacy systems. This paper gives a case study on using middleware technologies for the implementation of reengineering distributed and heterogeneous bank legacy system in Anhui branch of China Construction Bank. Using middleware to migrate legacy system has proved to be good choice in practice.

关键词： legacy system middleware migrate

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数据库legacy system向集成的Web Service迁移的技术研究

数据库Legacy System向集成的Web Service迁移的技术研究

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作者：姜郁峰内蒙古科技大学

学位级别：硕士

随着信息技术和互联网行业的高速发展,越来越多的大型系统实现了更新换代,那些传统的、存在问题的旧系统被淘汰为“遗留系统”。数据库legacy system,即数据库遗留系统,是企业中不能交互的老化的系统。对于数据库而言,不能很好的移植数... 详细信息

随着信息技术和互联网行业的高速发展,越来越多的大型系统实现了更新换代,那些传统的、存在问题的旧系统被淘汰为“遗留系统”。数据库legacy system,即数据库遗留系统,是企业中不能交互的老化的系统。对于数据库而言,不能很好的移植数据而简单的摒弃以往的legacy system不是一个很好的选择。所以解决数据库遗留数据成为当今一个很棘手的问题。相继出现了许多解决遗留系统问题的方法。新建系统不仅造价高昂,而且对旧系统的数据不能有效的利用;利用再工程只是对系统“寿命”的延长,是一个解决的次级方案;利用多种形式的包装系统在许多方面存在局限性。　　然而在这方面Web Service有着很强大的特性。Web Service是基于面向服务的SOA(Service Oriented Architecture)网络服务概念,它是一种进行数据交互和共享的思想。Web Service有自己的UDDI注册库,通过WSDL语言进行服务描述,通过SOAP进行数据的交互。Web Service具有良好的封装性、松耦合、标准行为规范和高度集成的特性。　　本文主要提出一种集成的Web Service轻量级系统集成应用架构。运用Web Services强大的应用接口功能,通过SOAP协议进行数据交互,在人工的干涉下,提出整体服务和集成小Web Service的方法,实现数据库接口自动转变成Web Services方法。不仅解决了遗留数据访问的不可操作性,而且对异构平台数据的互操作提供了服务方法和访问接口,一定程度上节约企业原有资金成本。此外,本文还详细介绍了各个应用模块的设计思想。　　最后,通过2010年的全国IP数据设计出了基于Web Service的legacy system并进行的数据测试,验证该方法的可行性。同时将此原型系统和国内外设计的实验系统做了对比。

关键词：遗留系统 legacy system Web Service 再工程 WSDL 软件体系结构应用程序 Axis 资源描述系统界面

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A Component Mining Approach to Incubate Grid Services in Object-Oriented legacy systems

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International Journal of Automation and computing 2006年第1期3卷 47-55页

作者： Jian-Zhi Li Zhuo-Peng Zhang Bing Qiao Hong-Ji Yang Software Technology Research Laboratory De Montfort University Leicester LE1 9BH UK

This paper describes an approach for Grid service component mining in object-oriented legacy systems, applying software clustering, architecture recovery, program slicing and wrapping techniques to decompose a legacy system, analyse the concerned components and integrate them into a Grid environment. The resulting components with core legacy code function in a Grid service framework.

关键词： Grid service legacy system software component software clustering architecture recovery program slicing.

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HealthyBlockchain for Global Patients

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Computers, Materials & Continua 2021年第8期68卷 2431-2449页

作者： Shada A.Alsalamah Hessah A.Alsalamah Thamer Nouh Sara A.Alsalamah College of Computer and Information Sciences King Saud UniversityRiyadh11451Saudi Arabia Digital Health and Innovation Science DivisionWorld Health OrganizationGenevaCH-1211Switzerland MIT Department of Mechanical Engineering Massachusetts Institute of Technology(MIT)Cambridge02139MAUSA College of Engineering and Architecture Al Yamamah UniversityRiyadh11451Saudi Arabia Trauma and Acute Care Surgery Unit College of MedicineKing Saud UniversityRiyadh11451Saudi Arabia College of Computer and Information Sciences Al Imam Mohammad Ibn Saud Islamic UniversityRiyadh13318Saudi Arabia

An emerging healthcare delivery model is enabling a new era of clinical care based on well-informed decision-making *** healthcare information systems(HISs)fall short of adopting this model due to a conflict between information security needed to implement the new model and those already enforced locally to support traditional care ***,in recent times,the healthcare sector has shown a substantial interest in the potential of using blockchain technology for providing quality care to *** blockchain solution proposed so far has fully addressed emerging cross-organization information-sharing needs in *** this paper,we aim to study the use of blockchain in equipping struggling HISs to cope with the demands of the new healthcare delivery model,by proposing HealthyBlockchain as a granular patient-centered ledger that digitally tracks a patient’s medical transactions all along the treatment pathway to support the care *** patient-centered ledger is a neutral tamper-proof trail timestamp block sequence that governs distributed patient information across the decentralized discrete *** connects patients,clinicians,and healthcare providers to facilitate a transparent,trustworthy,and secure supporting platform.

关键词： Blockchain eHealth electronic health record global patient healthcare information system information security legacy system patient-centered care privacy smart contract trust

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An Orthogonal Approach to Reusable Component Discovery in Cloud Migration

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China Communications 2015年第5期12卷 134-151页

作者： ZHAO Junfeng ZHOU Jiantao YANG Hongji LIU Guoping College of Computer Science Inner Mongolia University Hohhot Centre for Creative Computing Bath Spa University Bath Advanced Control and Network Technology Research Unit University of South Wales

As an innovative software application mode,Software as a service(SaaS) shows many attractive *** legacy system to SaaS can make outdated systems *** the process of migration,the existing valuable components need to be discovered and reused in order that the target system could be developed/integrated more *** innovative approach is proposed in this paper to extract the reusable components from legacy ***,implementation models of legacy system are recovered through reverse ***,function models are derived by vertical clustering,and then logical components are discovered by horizontal clustering based on the function ***,the reusable components with specific feature descriptions are *** experimental verification,the approach is considered to be efficient in reusable component discovery and to be helpful to migrating legacy system to SaaS.

关键词： legacy system architecture recovery horizontal clustering vertical clustering, reusable component

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Strategies and Methods for Cloud Migration

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International Journal of Automation and computing 2014年第2期11卷 143-152页

作者： Jun-Feng Zhao Jian-Tao Zhou College of Computer Science Inner Mongolia University

legacy system migration to the cloud brings both great challenges and benefits, so there exist various academic research and industrial applications on legacy system migration to the cloud. By analyzing the research achievements and application status,we divide the existing migration methods into three strategies according to the cloud service models integrally. Different processes need to be considered for different migration strategies, and different tasks will be involved accordingly. The similarities and differences between the migration strategies are discussed, and the challenges and future work about legacy system migration to the cloud are proposed. The aim of this paper is to provide an overall presentation for legacy system migration to the cloud and identify important challenges and future research directions.

关键词： Migration legacy system cloud infrastructure as a service(IaaS) platform as a service(PaaS) software as a service(SaaS).

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一个基于系统重建思想的数据采集系统的设计与实现

一个基于系统重建思想的数据采集系统的设计与实现

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第十八届全国数据库学术会议

作者：袁晴晴周皓峰陈宇达施伯乐复旦大学计算机科学与工程系

1引言随着计算机技术的高度发展和日益普及,越来越多的应用系统投入了运行。越来越多的遗留系统也就随之产生。如果原系统开发及维护的成本较大,抛弃不用的策略显然不合适,因为这样做不但成本

关键词： system Reengineering legacy system Data Collector

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遗留系统的改建技术分析及利用策略

遗留系统的改建技术分析及利用策略

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第十八届全国数据库学术会议

作者：郑伟宋雨陈基禄华北电力大学计算机科学与工程系

1引言因特网及电子商务的迅猛发展给信息界和软件产业界带来了巨大影响,与之相关的CORBA及COM组件技术越来越成熟,同时还涌现出大量不依赖于现有体系结构的新应用程序,这一切都为遗留系统带来了新的生机,也为遗留系统的改造开辟了新路... 详细信息

1引言因特网及电子商务的迅猛发展给信息界和软件产业界带来了巨大影响,与之相关的CORBA及COM组件技术越来越成熟,同时还涌现出大量不依赖于现有体系结构的新应用程序,这一切都为遗留系统带来了新的生机,也为遗留系统的改造开辟了新路。首先,给出遗留系统的定义。

关键词： legacy system Development technology Reconstruction Wrap Migration

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