1,721,710 research outputs found
FIGURE 4 in A new felt scale genus Macroporicoccus gen. n. (Hemiptera: Coccoidea: Eriococcidae) from China, with a redescription of Macroporicoccus ulmi (Tang & Hao) comb. n.
No full textFIGURE 4. Adult female Macroporicoccus ulmi (Tang & Hao). Where: A. antenna; B. a pair of coeloconic sensilla; C. thoracic spiracle; D. trilocular pore; E. quinquelocular pore; F. fore or middle leg; G. pore plate; H. hind claw; I. ventral setae; J. anal ring; K. microtubular duct; L. macrotubular duct; M. macrodisc pore.Published as part of Nan, Nan, Deng, Jun & Wu, San'An, 2013, A new felt scale genus Macroporicoccus gen. n. (Hemiptera: Coccoidea: Eriococcidae) from China, with a redescription of Macroporicoccus ulmi (Tang & Hao) comb. n., pp. 170-182 in Zootaxa 3722 (2) on page 176, DOI: 10.11646/zootaxa.3722.2.3, http://zenodo.org/record/526731
Key Term Extraction from Spoken Documents
No full text擷取關鍵語彙一直是一個重要的課題,可惜目前的研究較少,內容多分散在各個 不同的會議或是文章的某些部份,尚缺乏一個完整的簡介,也缺乏統一的比較。 本論文首先將目前較常見的方法歸納整理,分析各項方法的優缺點,提出一個較 統一的評估方式,然後進行比較。此外,過去使用的方法有過多人為的介入,例 如手動去除停用詞。為保留真實擷取關鍵語彙的環境,我們在不對語料進行過多 的前處理及後處理的情況下進行實驗。
與前人不同的是,我們不在只利用單一特徵進行篩選,而嘗試使用單純貝 氏分類器及馬可夫模型同時使用不同的特徵來擷取關鍵語彙。雖然最後結果 F-measure 分別只有 18.0% 及 17.0% ,但召回率都有超過一半,分別為 55.6% 及 54.2% 。我們還嘗試進行特徵選擇,發現某些特徵組合表現較好,且兩模型均有 穩定的表現。
進行特徵分析的結果顯示,多半被視為停用詞的詞很有可能是決定關鍵語彙的 線索,我們稱這些詞為線索詞。從模型上的表現顯示,平均而言,使用線索詞的 表現都優於不使用線索詞。可見某些停用詞提供了重要的訊息,不應該隨意地移 除。
我們更發現,訓練集及測試集有著不小的差異,測試集中有超過半數的詞是詞 外詞。在如此不批配的環境下兩個模型能有如此的表現,顯示使用模型比使用單 一特徵來的有效且穩定
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Core-branch CoNi hydroxysulfides with versatilely regulated electronic and surface structures for superior oxygen evolution electrocatalysis
No full textAbstract not available.Bin Wang, Cheng Tang, Hao-Fan Wang, Xiao Chen, Rui Cao, Qiang Zhan
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