本文選題：概念圖　切入點(diǎn)：概念圖工具　出處：《華中師范大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：概念圖源于認(rèn)知心理學(xué)研究。它是一種對知識進(jìn)行組織、呈現(xiàn)和分享的重要工具。繪制一個概念圖,包括創(chuàng)建節(jié)點(diǎn)和建立連接線兩個關(guān)鍵操作。其中,節(jié)點(diǎn)代表一個概念,連接線表示概念間的關(guān)系。現(xiàn)存的概念圖工具,通常使用鼠標(biāo)鍵盤式的交互方式,這種交互方式通常會存在兩個問題。第一,創(chuàng)建一個概念圖的時候,往往強(qiáng)制用戶采用特定的圖示組織結(jié)構(gòu),即在用戶還沒有完成兩個概念的書寫時,就要求其先確定圖的類型。這種要求在一定程度上會限制用戶的思路靈活性和增加用戶的認(rèn)知負(fù)擔(dān)；第二,不適用于支持筆式和手勢交互的計算機(jī)。另外,一些支持手繪概念圖的工具,雖然可以在繪制方面為用戶提供便利,但其對于概念圖的后續(xù)編輯和操作方面又比較欠缺。最后,市場上現(xiàn)有的概念圖工具側(cè)重點(diǎn)各不相同,純粹用于教學(xué)領(lǐng)域的概念圖工具比較缺乏。針對上述問題,本文面向教學(xué)領(lǐng)域,設(shè)計并實(shí)現(xiàn)了一個基于筆式手勢交互的概念圖自動識別工具。該工具以starC云端一體化教學(xué)平臺作支撐,從教師需求出發(fā),在滿足課堂教學(xué)知識不間斷傳遞的前提下,實(shí)現(xiàn)基本功能。本文所述工具的特點(diǎn)歸結(jié)如下：1.允許用戶先書寫文本內(nèi)容,再選擇概念圖類型。用戶可以先在書寫界面上書寫內(nèi)容,待到需要時,再將書寫內(nèi)容識別為相應(yīng)的概念圖。此功能是本論文的一個主要創(chuàng)新點(diǎn)。2.支持對概念圖的結(jié)構(gòu)化操縱。對于識別后的概念圖,支持用戶對其執(zhí)行相應(yīng)操作,包括對單個節(jié)點(diǎn)、多個節(jié)點(diǎn)或者整個圖進(jìn)行編輯操作。3.支持手勢命令操作。為了增加工具的易用性和體驗(yàn)性,設(shè)計了專門用于本文所述工具的幾個手勢命令,目前支持的手勢命令包括“折疊”、“展開”、“刪除”、“恢復(fù)”、“復(fù)制”、“剪切”和“粘貼”命令。4.支持觸摸和鼠標(biāo)兩種輸入和操作方式。本文工具可以在觸摸場景和普通鼠標(biāo)場景下工作,為用戶提供多種交互方式的選擇。論文通過對概念圖的基本知識的學(xué)習(xí)和研究,在分析和借鑒現(xiàn)存概念圖工具優(yōu)點(diǎn)的基礎(chǔ)上,將概念圖的制作嵌入到課堂教學(xué)中。研究并設(shè)計了概念圖提取算法、手勢識別算法和概念圖操縱算法,實(shí)現(xiàn)了一個支持手勢交互的概念圖自動生成工具。同時基于課堂實(shí)踐,通過實(shí)驗(yàn)驗(yàn)證工具的可用性,并統(tǒng)計手勢識別率和準(zhǔn)確率。
[Abstract]:A concept map is an important tool for organizing, presenting, and sharing knowledge. Drawing a concept map involves two key operations: creating nodes and creating connections. Where nodes represent a concept. Connectors represent relationships between concepts. Existing concept mapping tools, usually using mouse and keyboard interactions, often have two problems. First, when you create a concept diagram, The user is often forced to adopt a specific graphical organization structure, that is, when the user has not completed the writing of the two concepts, This requirement limits the user's flexibility in thinking and increases the user's cognitive burden; second, it is not applicable to computers that support pen and gesture interactions. Some of the tools that support hand-drawn concept maps, while facilitating the production of them, are less suitable for subsequent editing and operation of concept maps. Finally, the existing concept map tools on the market have different emphasis on each other. In view of the above problems, this paper focuses on the teaching field. A concept map automatic recognition tool based on pen gesture interaction is designed and implemented. The tool is supported by the starC cloud integrated teaching platform, which is based on the teachers' needs and satisfies the continuous transfer of classroom teaching knowledge. Implement basic functions. The features of the tools described in this article can be summarized as follows: 1. Allow users to write text content first, then select concept map types. Users can write content on the writing interface first, and when needed, This function is one of the main innovation points of this paper. 2. It supports the structural manipulation of the concept map. For the recognized concept map, it supports the user to perform the corresponding operation on the concept map, including the single node. Support gesture command operation. In order to increase the ease of use and experience of the tool, we designed several gesture commands specifically for the tools described in this article. The currently supported gesture commands include "fold", "expand", "delete", "restore", "copy", "cut" and "paste" commands .4.It supports both touch and mouse input and operation. Through the study and research on the basic knowledge of the concept map, this paper analyzes and draws on the advantages of the existing concept map tools. This paper embeds the concept map into classroom teaching, studies and designs the concept map extraction algorithm, the gesture recognition algorithm and the concept map manipulation algorithm, realizes a concept map automatic generation tool which supports gesture interaction. At the same time, it is based on classroom practice. The usability of the tool is verified by experiments, and the recognition rate and accuracy of gesture recognition are calculated.
【學(xué)位授予單位】：華中師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：G434
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本文編號：1588453