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The investigation of Combustion Synthesis of Nanosized Silicon Powder from HMDSA and HMDSO in the Premixed Methane Flat Flame
No full text利用氣相燃燒合成法合成奈米等級SiO2產物，在火焰的高溫環境下有自我純化、同質成核的特性，並有可連續式生產，產物均質度較高等眾多優點。而由文獻中可知燃燒合成產物的粒徑受到火焰燃料、前置物種類、通入源濃度、火焰溫度、燃燒器種類等眾多因數的影響。本文在甲烷火焰中通入不同的矽前置源HMDSA（C6H19NSi2）與HMDSO（C6H18OSi2），並藉由平板燃燒器火焰結構穩定、火焰溫度分佈平均的特性，探討當量比與濃度變化對奈米產物粒徑的影響。The Gas-phase combustion synthesis of nanosized silicon can makes continuously high-purity product by the property of self-purifying and homologous nucleation. Previous studies show that the diameter of product is influenced by some experimental parameters, such as fuel, precursor, concentration, reaction temperature, and reaction burner. This study adds HMDSA and HMDSO into the premixed methane flat flame burner to establish the relationship of silicon product diameter under the different fuel-air ratio, concentration of precursor, and the others operation conditions.第1章 導論 1
1.1 前言 1
1.1.1 奈米材料種類及應用 1
1.1.2奈米材料特性 2
1.1.3奈米科技產業 4
1.2 研究動機與目的 5
1.3文獻回顧 7
第2章 反應機構的探討 12
2.1 HMDS介紹 12
2.2 化學反應機構 12
2.2.1 化學反應機構簡介 12
2.2.2反應機構與反應速率關係 13
2.3 HMDS反應機構和甲烷燃燒反應機構介紹 15
2.3.1 HMDS燃燒反應機構 15
2.3.2甲烷燃燒反應機構 17
第3章實驗研究方法 19
3.1 實驗架構和參數定義 19
3.2 實驗設備 20
3.2.1 燃燒器系統 20
3.2.2 燃料輸送系統 21
3.2.3 其他設備 22
3.3 實驗步驟 22
3.3.1 實驗前之準備 22
3.3.2 實驗操作條件 23
3.3.4 火焰之定量量測及定性觀察 24
3.3.5 燃燒產物的收集與分析 24
3.4 儀器校正 25
3.4.1 流量計校正 25
3.4.2 熱電偶校正 26
第4章 結果與討論 28
4.1 通入HMDS之甲烷火焰特性 28
4.1.1 火焰結構 28
4.1.1.1 前置物種類及濃度的影響 28
4.1.1.2 燃料當量比的影響 29
4.1.2 火焰溫度分佈及趨勢 31
4.1.2.1 本生式燃燒器的軸向火焰溫度分佈 31
4.1.2.2平板式燃燒器的軸向火焰溫度分佈 33
4.1.2.3平板式燃燒器的徑向火焰溫度分佈 34
4.2 產物分析 35
4.2.1 EDS（能量散布光譜儀） 36
4.2.2 XRD（X光繞射儀） 36
4.2.3 TEM（穿透式電子顯微鏡） 36
4.2.4 BET（吸附式路徑量測儀） 37
4.3 燃燒產物粒徑分析 38
4.3.1 前置物種類及濃度對產物粒徑的影響 39
4.3.2 當量比對產物粒徑的影響 40
4.3.3 燃燒器種類對產物粒徑的影響 40
第5章 結論和建議 42
5.1結論 42
5.2建議 44
參考文獻 45
附 錄 87
A 相關精密儀器的介紹 87
A.1 EDS（能量散布光譜儀） 87
A.2 XRD（X光粉末繞射儀） 89
A.3 TEM（穿透式電子顯微鏡） 92
A.4 BET（吸附式粒徑量測儀） 94
作者簡歷 10
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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