本文選題：網(wǎng)格 + 教育資源��； 參考：《重慶師范大學(xué)》2008年碩士論文

【摘要】： 21世紀(jì)是人類全面進(jìn)入信息化社會(huì)的偉大時(shí)代,教育信息化、數(shù)字化建設(shè)也在不斷深入,各類教育資源將會(huì)越來越多,并呈指數(shù)級(jí)增長。但是當(dāng)前的教育資源建設(shè)普遍存在如下一些問題:優(yōu)質(zhì)資源較少,存儲(chǔ)分散,缺乏廣泛的資源合作;遠(yuǎn)程教育標(biāo)準(zhǔn)不完善,網(wǎng)絡(luò)存在大量的異構(gòu)結(jié)構(gòu);教育資源不能大范圍內(nèi)共享,利用率不高,重復(fù)開發(fā)現(xiàn)象嚴(yán)重;資源檢索的技術(shù)智能化水平不高;資源的獲取和應(yīng)用及更新速度慢,動(dòng)態(tài)適應(yīng)性較差等。其中主要問題還是沒有形成資源的有效共享。 網(wǎng)格技術(shù)的出現(xiàn),使資源的完全共享有了實(shí)現(xiàn)的可能,因?yàn)榫W(wǎng)格的本質(zhì)就是資源的全面共享。網(wǎng)格具有在教育領(lǐng)域有廣泛應(yīng)用價(jià)值的特性:共享性、動(dòng)態(tài)性、異構(gòu)性、超級(jí)計(jì)算性能、強(qiáng)大的服務(wù)支持等。網(wǎng)格技術(shù)革新了傳統(tǒng)資源共享的弊端,使教育資源能夠全面共享,異構(gòu)系統(tǒng)互操作再無障礙,網(wǎng)格創(chuàng)新了“服務(wù)”的概念,對(duì)學(xué)習(xí)者提供按需服務(wù)。 教育資源的注冊(cè)和發(fā)現(xiàn)是教育資源有效共享的核心和基礎(chǔ)。只有在資源注冊(cè)和發(fā)現(xiàn)的基礎(chǔ)上,其他應(yīng)用才可能實(shí)現(xiàn)。本文首先簡述了網(wǎng)格技術(shù)的定義及特點(diǎn),分別論述了三種流行的資源元數(shù)據(jù)描述標(biāo)準(zhǔn),并提出了一種改進(jìn)的教育資源的元數(shù)據(jù)描述。在已有發(fā)現(xiàn)機(jī)制的基礎(chǔ)上,提出了一種基于層次的教育資源分類注冊(cè)與發(fā)現(xiàn)方法。最后給出了教育資源注冊(cè)及發(fā)現(xiàn)算法,并使用GridSim進(jìn)行了仿真測(cè)試。
[Abstract]:The 21st century is a great time for mankind to enter the information society in an all-round way. The construction of educational informatization and digitization is also deepening continuously. All kinds of educational resources will be more and more, and will increase exponentially. However, the current construction of educational resources has the following problems: less high-quality resources, scattered storage, lack of extensive cooperation of resources, imperfect standards of distance education, and a large number of heterogeneous structures in the network; The educational resources can not be shared in a large scale, the utilization rate is not high, the phenomenon of repeated exploitation is serious, the technology intelligence level of resource retrieval is not high, the acquisition, application and renewal of resources are slow, the dynamic adaptability is poor, etc. The main problem is that there is no effective sharing of resources. With the emergence of grid technology, it is possible to share resources completely, because the essence of grid is the overall sharing of resources. Grid has the characteristics of widely applied value in the field of education: sharing, dynamic, heterogeneous, super computing performance, powerful service support and so on. Grid technology has revolutionized the disadvantages of traditional resource sharing, which makes educational resources fully shared, and the heterogeneous systems can operate again without hindrance. Grid innovates the concept of "service" and provides on-demand service to learners. The registration and discovery of educational resources is the core and foundation of effective sharing of educational resources. Other applications can only be implemented on the basis of resource registration and discovery. In this paper, the definition and characteristics of grid technology are briefly introduced, three popular standards of resource metadata description are discussed, and an improved metadata description of educational resources is proposed. Based on the existing discovery mechanism, a hierarchical method for the classification registration and discovery of educational resources is proposed. Finally, the algorithm of educational resource registration and discovery is given, and the simulation test is carried out with GridSim.
【學(xué)位授予單位】：重慶師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2008
【分類號(hào)】：G434

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本文編號(hào)：1885136