本文選題：VSM + 語義理解　； 參考：《杭州電子科技大學(xué)》2015年碩士論文

【摘要】：隨著我國對(duì)科技經(jīng)費(fèi)投入的逐漸增多,科研單位科技項(xiàng)目的申請(qǐng)也變得越來越多,怎么樣有效的解決項(xiàng)目重復(fù)立項(xiàng)問題是現(xiàn)代科技項(xiàng)目管理中非常重要的一部分。傳統(tǒng)的人工查重顯然是不行的,而已有的一些查重系統(tǒng)在精度和速度上都不能滿足要求,因此對(duì)項(xiàng)目查重系統(tǒng)關(guān)鍵技術(shù)的研究就變得非常有必要。本文重點(diǎn)對(duì)科技項(xiàng)目的表示模型、相似度計(jì)算和聚類等技術(shù)進(jìn)行研究。主要工作包括以下幾個(gè)方面：1.根據(jù)科技項(xiàng)目內(nèi)容復(fù)雜、信息大的特點(diǎn),提出一種結(jié)合物元知識(shí)表示模型和向量空間模型的科技項(xiàng)目知識(shí)表示模型和科技項(xiàng)目關(guān)系模型,方便后續(xù)對(duì)科技項(xiàng)目的表示和處理。2.針對(duì)科技項(xiàng)目的查重需求,分析總結(jié)了基于向量空間模型的相似度計(jì)算方法和基于語義理解的相似度計(jì)算方法,在此基礎(chǔ)上提出了一種基于語義理解的VSM相似度計(jì)算方法。針對(duì)科技項(xiàng)目名稱中含有大量有用信息,字?jǐn)?shù)較少且含有較多專業(yè)名詞的特點(diǎn),提出了一種改進(jìn)的基于編輯距離的句子相似度計(jì)算方法。最后把以上兩種方法分別應(yīng)用于科技項(xiàng)目的主要內(nèi)容和項(xiàng)目名稱的相似度計(jì)算中,并進(jìn)行權(quán)重調(diào)整,綜合計(jì)算整個(gè)科技項(xiàng)目的相似度。3.針對(duì)科技項(xiàng)目查重時(shí)需把待查項(xiàng)目和已有所有項(xiàng)目進(jìn)行比對(duì),效率較低的問題,本文先進(jìn)行項(xiàng)目聚類然后再進(jìn)行查重。而已有的聚類算法有需要預(yù)先輸入?yún)?shù)和算法時(shí)間復(fù)雜度較高無法應(yīng)用于大型項(xiàng)目庫等問題,本文提出一種基于雙閾值的最近鄰項(xiàng)目聚類算法并應(yīng)用于項(xiàng)目查重系統(tǒng),在不影響查重精度的情況下,提高了查重速度。在以上相似度計(jì)算方法和聚類算法研究成果的基礎(chǔ)上,實(shí)際應(yīng)用于浙江省科技項(xiàng)目相似度檢測(cè)系統(tǒng)中,有效地實(shí)現(xiàn)了項(xiàng)目查重功能,并且有良好查重準(zhǔn)確度和運(yùn)行速度,成功驗(yàn)證了本論文研究成果的可行性。
[Abstract]:With the increasing investment of science and technology funds in our country, the application of scientific and technological projects in scientific research units has become more and more. How to effectively solve the problem of project duplicate establishment is a very important part of modern science and technology project management. It is obvious that the traditional manual checking is not feasible, and some of the existing checking systems can not meet the requirements in accuracy and speed. Therefore, it is necessary to study the key technologies of the item checking and rechecking system. This paper focuses on the representation model of scientific and technological projects, similarity calculation and clustering techniques. The main work includes the following aspects: 1. According to the characteristics of complex contents and large information of scientific and technological projects, a model of knowledge representation of scientific and technological projects and a relational model of scientific and technological projects are proposed in combination with matter-element knowledge representation model and vector space model, which can facilitate the subsequent representation and processing of scientific and technological projects. According to the need of scientific and technological projects, this paper analyzes and summarizes the similarity calculation methods based on vector space model and semantic understanding. Based on this, a VSM similarity calculation method based on semantic understanding is proposed. In view of the fact that the names of scientific and technological projects contain a lot of useful information, fewer words and more professional nouns, an improved sentence similarity calculation method based on editing distance is proposed. Finally, the above two methods are applied to the similarity calculation of the main contents of the science and technology project and the name of the project, and the weight is adjusted to calculate the similarity of the whole science and technology project. 3. In order to solve the problem that it is necessary to compare the items to be checked with all the existing items and the efficiency is low, this paper first clusters the items and then checks them again. However, the existing clustering algorithms need to input parameters in advance and the time complexity of the algorithms can not be applied to large project library. In this paper, a clustering algorithm for nearest neighbor items based on double thresholds is proposed and applied to the item checking system. Under the condition of not affecting the checking accuracy, the checking speed is improved. On the basis of the above research results of similarity calculation method and clustering algorithm, it has been applied to the similarity detection system of science and technology projects in Zhejiang Province. It has effectively realized the function of checking duplicate of items, and has good accuracy and running speed. The feasibility of the research results is verified successfully.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TP391.1

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本文編號(hào)：1949205