- 學位論文
使用反向樂透模式提昇線上測驗效能
Using Reversed Lottery Model to Improve On-Line Testing
摘要
線上電腦輔助測驗在未來教學領域裏將扮演重要的角色，為了能夠產生不可預期及規則性的試卷題目，因此必須使用隨機的方式抽取資料庫中的試題，但隨機抽取往往衍生出重覆性的碰撞問題而降低系統執行效率；碰撞問題可藉樂透抽獎方式予以解決，由於在同一回合的樂透遊戲中，抽中即離開候選群，不用擔心此號碼再次的出現。 本研究在電腦系統中使用樂透模式來模擬開獎機的運作，其中最大的差別在於須將全部的題號以隨機方式抽出，但在網際網路的環境中，服務系統的回應效率一直是主要訴求，如果將抽選的工作由伺服端來執行，在多人多工即時線上隨機測驗環境會因伺服器負荷過重而造成回應效率低落。 本研究提出反向樂透模式（Reversed Lottery Model）來實施隨機線上電腦輔助測驗，此模式是由使用端電腦線上下載開獎機與試題後，自行實施隨機抽選題號的工作，如此可有效降低伺服端的工作負擔，以及減少了網路資料傳輸的次數。反向樂透模式的線上隨機測驗在實際驗証測試中，整體系統穩定度及可用度皆獲得全數使用者認定為足以服務學生進行測驗之基本要求。
並列摘要
The random pattern to assist computer online testing plays an important role at futures in teaching fields. To produce examination questions which do not have preparatory course or regularity. So during testing using random sampling to access the examination questions from database meets these kinds of testing pattern. But using random sampling often brings collision to reduce system efficiency; Collide problem can be solve by using lotto model, When announcing the winners in a lottery game, Director carry out a number from lottery machine by random, During a lottery game, this number will not show up again. This research is going to simulate the lotto machine in computer system. Among them the biggest difference lies in taking all question number out in way at random. But in the environment of Internet, The response efficiency of the system services has been demanded mainly all the time, to release the random work that execute by server, In the multi-task environment will causes low respond efficiency at real-time random online. This research nominative Reversed Lottery Model to implement random pattern to assist computer online testing. This model is to use the client side computer to working of numbers at random by itself when download the lotto machine simulator and examination questions on-line, the work that can lighten the server side burden, and reduced the number of times of data transmission on the network environment too. After measurement the Reversed Lottery Model at on-line random testing, The system was steady and all the users are validate that this model can meets their need during testing on-line.
參考文獻
延伸閱讀
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