1,899 research outputs found
Dataset for the paper "Climate model bias indicates higher projected future temperature extremes"
No full text<div>
<div>This repository holds data and scripts used to produce the paper entitled:</div>
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<div>"Climate model bias indicates higher projected future temperature extremes"</div>
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<div>by Lei Duan, Lyssa M. Freese, Govindasamy Bala, and Ken Caldeira.</div>
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<div>The paper is currently submitted for peer review.</div>
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<div>Any questions regarding the data and paper could be sent to the corresponding author: Lei Duan ([email protected])</div>
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Analysis of the conform process: a specific form of aluminium extrusion.
No full textSince the Conform process was patented 30 years ago, there have only been approximately 200 machines sold worldwide. Given that Conform competes economically with conventional extrusion and is also reported to be a more energy
efficient process, it is surprising that the use of Conform is not more widespread in today's increasingly environmentally conscious and high-production focussed world. One explanation for this is likely to be due to the fact that there is still limited knowledge of the thermo-mechanical behaviour of the workpiece during extrusion.
Furthermore, for the aluminium industry, there are still issues remaining regarding the production of flash and the quality of the extrudate in terms of mechanical properties. This study provides the reader with the findings of the research and experimental work undertaken by the author, his co-workers and fellow specialists, in the field of aluminium extrusion including Conform. The experimental work includes both laboratory experiments performed with a direct extrusion press and an experimental machine set up to replicate the Conform process. The experimental work is also simulated using finite element modelling techniques. The results from these analyses are then validated by comparing industrial and experimental data. The finite element analyses are enhanced by using parallel processing technology and user sub-routines. The author proposes new models to allow for the study of the different sub-processes in Conform. These include the coining of the feedstock, formation of the upset zone, extrusion of the flash, the filling-up of the expansion chamber / feeder plate and the extrusion of the extrudate. The author also investigates methods which predict microstructure and surface cracks in the extrudate. The author suggests innovative techniques to improve the efficiency of finite element analysis in metal forming. Finally the author recommends procedures for the study of structural integrity and the optimisation of the tooling used in Conform
TAXONOMIC REVISION OF THE FERN GENUS CTENITIS (DRYOPTERIDACEAE) FROM AFRICA AND THE WESTERN INDIAN OCEAN
No full textA taxonomic revision of Ctenitis (C. Chr.) C. Chr. (Dryopteridaceae) from Africa and the Western Indian Ocean was carried out. Forty species are recognized, of which 12 are described as new, eight are transferred to Ctenitis from other genera, and one is elevated from variety to species and transferred from Aspidium Sw. to Ctenitis. These 21 nomenclatural novelties include C. analamazaotrensis (Rakotondr.) Hennequin & Rouhan (comb. nov.), C. brevipetiolulata Li Bing Zhang & Yi F. Duan (sp. nov.), C. bullescens Rouhan, Li Bing Zhang & Yi F. Duan (sp. nov.), C. cerea Li Bing Zhang & Yi F. Duan (sp. nov.), C. comorensis Li Bing Zhang & Yi F. Duan (sp. nov.), C. crinigera (C. Chr.) Hennequin & Rouhan (comb. nov.), C. decaryana (C. Chr.) Hennequin & Rouhan (comb. nov.), C dentata Li Bing Zhang & Yi F. Duan (sp. nov.), C. fibrillosa (Baker) Li Bing Zhang & Yi F. Duan (comb. nov.), C. hispida (Kuhn) Li Bing Zhang & Yi F. Duan (comb. & stat. nov.), C. jouyana (Rakotondr.) Hennequin & Rouhan (comb. nov.), C. longivillosa Li Bing Zhang & Yi F. Duan (sp. nov.), C. marginalisora Li Bing Zhang & Yi F. Duan (sp. nov.), C mayottensis Li Bing Zhang & Yi F. Duan (sp. nov.), C. multilobata Li Bing Zhang, Yi F. Duan & Rouhan (sp. nov.), C. reunionensis Hennequin, Li Bing Zhang & Yi F. Duan (sp. nov.), C. sieberiana (Kaulf.) Hennequin & Rouhan (comb. nov.), C sparsa Li Bing Zhang & Yi F. Duan (sp. nov.), C. spekei (Baker) Li Bing Zhang & Yi F. Duan (comb. nov.), C. subcrenulata (Baker) Li Bing Zhang, Rouhan & Yi F. Duan (comb. nov.), and C tardieu-blotiae Li Bing Zhang & Yi F. Duan (sp. nov.). A key to these species is provided; all species are described and illustrated; and information on their distribution and habitats is given. Twenty-three relevant species reported in the literature are excluded from the flora, and their taxonomy, distribution, and nomenclature are discussed. Seventeen related names are lectotypified or neotypified including Aspidium cirrhosum Schumach., A. crinitum (Poir.) Wall. var. hispida Kuhn, A. cyclochlamys Fee, A. nitidum Bory ex Willd., A. pauciflorum Kaulf., A. sulcatum Kaulf. ex Bory, C. anjenabensis Tardieu, Dryopteris blepharochlamys C. Chr., Gymnogramma subsimilis Hook., Nephrodium crinitum (Poir.) Desv. var. maritimum Cordem, N.. magnum Baker, N. spekei Baker, N. welwitschii Baker, Phegopteris biformis Mett. ex Kuhn, P. bivestita Mett., Polypodium baronii Baker, and P. efulense Baker; type information of related 262 names is also given
Highlights of the Chinese exposure factors handbook (adults) /
No full textThe Chinese Research Academy of Environmental Sciences (CRAES) has conducted the Environmental exposure related activity pattern research of Chinese population (Adults). Exposure Factors Handbook of Chinese Population (Adults) was compiled based on the results from this study. Highlights of the Chinese Exposure Factors Handbook is a brief introduction to the content of Exposure Factors Handbook of Chinese Population (Adults). In each chapter, definitions, possible influence factors, and survey methods have been introduced, followed by recommended values for urban/rural areas, different genders, age groups and regions with information of mean, median and P5, P25, P75, P95 values. With the abundant data and tables, readers are provided with an accessible and comprehensive overview of Chinese exposure factors.Includes bibliographical references.Vendor-supplied metadata.The Chinese Research Academy of Environmental Sciences (CRAES) has conducted the Environmental exposure related activity pattern research of Chinese population (Adults). Exposure Factors Handbook of Chinese Population (Adults) was compiled based on the results from this study. Highlights of the Chinese Exposure Factors Handbook is a brief introduction to the content of Exposure Factors Handbook of Chinese Population (Adults). In each chapter, definitions, possible influence factors, and survey methods have been introduced, followed by recommended values for urban/rural areas, different genders, age groups and regions with information of mean, median and P5, P25, P75, P95 values. With the abundant data and tables, readers are provided with an accessible and comprehensive overview of Chinese exposure factors.Front Cover -- Highlights of the Chinese Exposure Factors Handbook (Adults) -- Copyright Page -- Contents -- Preface -- Foreword -- Synopsis -- List of Tables -- 1 Introduction -- 1.1 Background and purpose -- 1.2 Targeted exposure factors -- 1.3 The approach to developing recommended values of exposure factors -- 1.4 Uncertainty and variability -- 1.5 Limitation and further research needs -- 2 Inhalation Rates -- 2.1 Introduction -- 2.2 Recommended values -- 3 Water Ingestion Rates -- 3.1 Introduction -- 3.2 Recommended values -- 4 Food Intake4.1 Introduction4.2 Recommended values -- 5 Time-Activity Factors Related to Air Exposure -- 5.1 Introduction -- 5.2 Recommended values -- 6 Time-Activity Factors Related to Water Exposure -- 6.1 Introduction -- 6.2 Recommended values -- 7 Time-Activity Factors Related to Soil Exposure -- 7.1 Introduction -- 7.2 Recommended values -- 8 Time-Activity Factors Related to Electromagnetic Exposure -- 8.1 Introduction -- 8.2 Recommended values -- 9 Body Weight -- 9.1 Introduction -- 9.2 Recommended values -- 10 Body Surface Area -- 10.1 Introduction10.2 Recommended values11 Life Expectancy -- 11.1 Introduction -- 11.2 Recommended values -- 12 Residential Factors -- 12.1 Introduction -- 12.2 Recommended values -- References -- AcknowledgmentsElsevie
Effective detection of security compromises in enterprises using feature engineering
No full textThe student, Jiayi Duan, submitted this Thesis for approval on 2016-12-07 at 23:45.This Thesis was approved for publication on 2016-12-08 at 09:38.DSpace SAF Submission Ingestion Package generated from Vireo submission #10478 on 2017-02-28 at 14:43:24Made available in DSpace on 2017-03-01T17:02:07Z (GMT). No. of bitstreams: 2
DUAN-THESIS-2016.pdf: 1112146 bytes, checksum: d77746635b466f3808926f8232c490a0 (MD5)
LICENSE.txt: 4207 bytes, checksum: 18ee6948ab9e275c21515c3e9282f4d5 (MD5)
Previous issue date: 2016-12-08Embargo set by: Seth Robbins for item 98738
Lift date: 2019-03-01T17:02:22Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98738
Lift date: 2019-03-01T17:03:32Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98738
Lift date: 2019-03-01T17:05:02Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system"We present a method to effectively detect malicious activity in the data of enterprise logs. Our method involves feature engineering, or generating new features by applying operators on the features of the raw data. We apply the Fourier expansion of Boolean functions to generate parity functions on feature subsets, or parity features. We also investigate a heuristic method of applying Boolean operators to raw data features, generating propositional features. We demonstrate with real data sets that the engineered features enhance the performance of classifiers and clustering algorithms. As compared to classification of raw data features, the engineered features achieve up to 50.6% improvement in malicious recall while sacrificing no more than 0.47% in accuracy. Clustering with respect to the engineered features finds up to 6 ""pure"" malicious clusters, as compared to 0 ""pure"" clusters with raw data features. In one case, exactly one (1) engineered feature could achieve higher performance than 91 raw data features. In general, a small number (<10) of engineered features achieve higher performance than raw data features."Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2018-12-01The student, Jiayi Duan, accepted the attached license on 2016-12-07 at 23:36.Embargo set by: Seth Robbins for item 98738
Lift date: 2019-03-01T17:06:55Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 98738 on 2019-03-02T10:15:30Z
Digital Transcription of Historical Chinese Texts : A Case Study on the Digitization of Duan Yucai's Shuowen Jiezi Zhu
No full textThe mathematical theory of institution could present general foundations for ontology-based semantic integration. The author already presented a formalization of describing knowledge on Chinese characters by using institutinalized representational systems. This formalization can model systems constructed by characters and relations between them, and present an inference system to deduce facts on characters. The aim of this paper is to present a case study of creating digital versions of historical Chinese texts. Our target text for digitization is Duan Yucai's Shuowen Jiezi Zhu, which is a Qing print of an annotated edition of Xu Shen's Shuowen Jiezi dictionary. This dictionary was compiled during the Eastern Han Dynasty and presented interpretation of the simple pictographs and analysis of complex characters. Our digital transcription uses as a character encoding the Universal Character Set (Unicode) which includes a rich set of CJK ideographs. In the transcription with the Unicode characters, we use the three standard dictionaries selected by the Unicode Consortium. Identifing characters in origital texts requires an interpretation of them. In particular, we take notice of Duan Yucai's phonological annotations of characters. Phonological information of characters is useful for presenting digital transcription of anciant Chinese texts. Our case study of digitizing Shuowen Jiezi Zhu shows the usefulness of our formalization, which can present inference on phonological information of characters from Duan Yucai's annotations
Byasa genestieri Hu & Cotton & Lamas & Duan & Zhang 2023, stat. nov.
No full text<p> <b> 49. <i>Byasa genestieri</i> (Oberthür, 1918) stat. nov.</b> </p> <p> <i>Papilio Latreillei Genestieri</i> Oberth ̧r, 1918; Bull. Soc. ent. Fr., 1918 (12): 187; TL: ‘Siao-lou, Tchang-chau-pin et au haut Lou-Tse-Kiang’ [Sichuan and Yunnan (upper Mekong), China].</p> <p> <b>Note:</b> DNA analysis using the COI barcode from the first author’s lab, not previously published, found that the K2P genetic distance (Kimura 1980) between <i>Byasa genestieri</i> and <i>B. latreillei</i> is 3.38%, and the support value on the IQ-Tree is 0.88 (Xu 2022). This confirms the findings in a conference presentation by Deodati <i>et al</i>. (2007), who reported significant differences in COI sequences between the two taxa and stated they must be separate species. The main difference in male genitalia is the shape of the superuncus, which in <i>B. latreillei</i> is shorter, smooth and less curved downwardly, while in <i>B. genestieri</i> it is longer, hooked near the tip and evidently curved downwardly (Figures 6–8). The female genitalia of the two are very similar except for the slight difference in lamella postvaginalis (Figures 9 and 10). As a result, we separate <i>Byasa genestieri</i> and <i>B. latreillei</i> as distinct species (<b>stat. nov.</b>). <i>Byasa genestieri</i> comprises two subspecies, both occuring in Yunnan.</p>Published as part of <i>Hu, Shao-Ji, Cotton, Adam M., Lamas, Gerardo, Duan, Kuang & Zhang, Xin, 2023, Checklist of Yunnan Papilionidae (Lepidoptera: Papilionoidea) with nomenclatural notes and descriptions of new subspecies, pp. 1-69 in Zootaxa 5362 (1)</i> on page 28, DOI: 10.11646/zootaxa.5362.1.1, <a href="http://zenodo.org/record/10149411">http://zenodo.org/record/10149411</a>
Dissipative Quasigeostrophic Dynamics under Random Forcing
No full textThe quasigeostrophic model is a simplified geophysical fluid model at asymptotically high rotation rate or at small Rossby number. We consider the quasigeostrophic equation with dissipation under random forcing in bounded domains. We show that global unique solutions exist for appropriate initial data. Unlike the deterministic quasigeostrophic equation whose well-posedness is well-known, there seems no rigorous result on global existence and uniqueness of the randomly forced quasigeostrophic equation. Our work provides such a rigorous result on global existence and uniqueness, under very mild conditions. Key words: Quasigeostrophic model, random forcing, dissipation, stochastic partial differential equation. This work was supported by the National Science Foundation Grant DMS-9704345. Running head: Random Quasigeostrophic Dynamics Author for correspondence: Dr. Jinqiao Duan Department of Mathematical Sciences Clemson University, Clemson, South Carolina 29634, USA. E-mail: duan@m..
SOME NEWMAN-TYPE THEOREMS FOR MAPS FROM RIEMANNIAN-MANIFOLDS INTO MANIFOLDS
No full textMathematics, AppliedMathematicsSCI(E)1ARTICLE53-5911
Cong Shuo wen Duan zhu suo shu yin shen kan Duan Yucai he xin yi de li nian
No full text研究漢語詞義的學者一向對「詞義引申」十分重視。為求建立理論，學者常取段玉裁《說文解字注》所述的詞義引申作為研究起點。後人亦在段氏的基礎上提出了不少引申規律。為了達到以簡馭繁的效果，本文在前人研究基礎之上，運用核心義理論，考察段注所述引申條目中透露的核心義，目的是深入了解段若膺的詞義觀念，並嘗試更深入探討核心義理論。文章中運用的理論工具，揉雜了傳統訓詁學的觀點，亦引進了西方現代語義學的理論，務求為詞義引申之學開拓新視野和新研究空間。本文以段注的引申條目為研究對象。論文主要分為五個部分：第一部分是導論， 簡述前人對段注所述詞義引申的研究成果，分析其不足，指出可以運用最新的核心義理論，以簡馭繁地掌握多義詞。第二部分介紹本研究運用的研究理論與方法， 解釋研究中運用到的詞義概念，分析段注揭示核心義的方式，並說明本研究使用詞義系統分類。第三部分是本研究的主體，從段注中擷取210條條目，逐一把段氏之說跟義位作比對、分析，以確定該詞的核心義，並把核心義貫穿義位的方式以圖表展示。第四部分建基於第三部分的研究成果，嘗試深入討論核心義理論，例如指出核心義的本質、變化，歸納推求核心義的方法，考察核心義制約引申的情況，說明研究意義作用等等。第五部分是總結和展望 ，總結段注對我們研究核心義有怎樣的啟發，亦期望豐富對段注之研究。此外還檢討本研究尚有待討論之處，以待將來深入研究。This research paper belongs to the subjects of both Exegesis and Semantics. One prominent research field under these two subjects is the Extension of Meaning. There have been many scholars studying Duan Yucai’s book, Shuo wen jie zi zhu, which has had a great achievement in studying the Extension of Meaning, and expatiated many theories. With a view to having a good grasp of Mr Duan’s concept of meaning of words, Core Meaning Theory, is used to study how Shuo wen jie zi zhu explains the rationale behind the Extension of Meaning. It is hope that this research paper can provide a better understanding of Core Meaning Theory and form a solid background for the research of Extension of Meaning in the future.This paper focuses on the clauses of extended meanings in the Shuo wen jie zi zhu and it consists of five parts.Part one is the introduction. Starting with the research history of Shuo wen jie zi zhu, it illustrates that these researches are inadequate to comprehend Mr Duan’s rationale behind the explanation of Extension of Meaning. Using Core Meaning Theory is therefore very significant in simplifying this complicated rational.Part two introduces the theory and the method used in this paper, as well as some concepts of semantics. How Mr Duan acknowledged the Core Meaning in his book is also analyzed, followed by the system of meaning of words used in the paper.Part three is the main section. There are 210 annotations in Shuo wen jie zi zhu that have inspired us to acknowledge the Core Meaning. In this part of the paper, these annotations are compared with dictionary entries to analyze the Core Meaning of each word and graphs are drawn to show the relationship between the Core Meaning and the glosseme.Part four is the interpretation of Core Meaning Theory, which is based on the research of part three. The nature and the variation in Core Meaning are discussed, and the method of locating the Core Meaning is generalized. In addition, it illustrates how the Core Meaning affects the Extension of Meaning, and the usefulness of the Core Meaning is reiterated.Part five is the summary and the prospect. It is concluded that Shuo wen jie zi zhu is essential in inspiring us to locate the Core Meaning. It is hope that this paper can enrich the achievement of the book and result in more researches into this field in the coming future.Detailed summary in vernacular field only.Detailed summary in vernacular field only.Detailed summary in vernacular field only.Detailed summary in vernacular field only.Detailed summary in vernacular field only.Detailed summary in vernacular field only.Detailed summary in vernacular field only.盧冠忠.Thesis (M.Phil.) Chinese University of Hong Kong, 2015.Includes bibliographical references (leaves 242-265).Abstracts in English and Chinese.Lu Guanzhong
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