Through the analysis and comparison of shortcomings and advantages of existing technologies on object modeling in 3D applications,we propose a new modeling method for virtual scene based on multi-view image sequence t...Through the analysis and comparison of shortcomings and advantages of existing technologies on object modeling in 3D applications,we propose a new modeling method for virtual scene based on multi-view image sequence to model irregular objects efficiently in 3D application.In 3D scene,this method can get better visual effect by tracking the viewer's real-time perspective position and projecting the photos from different perspectives dynamically.The philosophy of design,the steps of development and some other relevant topics are discussed in details,and the validity of the algorithm is analyzed.The results demonstrate that this method represents more superiority on simulating irregular objects by applying it to the modeling of virtual museum.展开更多
In this paper, a sample including 68 blazars (18 BL Lacs and 50 FSRQs) with known Doppler factors and superluminal velocity from our previous papers is presented. Both the Lorentz factors (/') and viewing angles (...In this paper, a sample including 68 blazars (18 BL Lacs and 50 FSRQs) with known Doppler factors and superluminal velocity from our previous papers is presented. Both the Lorentz factors (/') and viewing angles (0) are estimated for the 68 sources The relationship between BL Lacs and FSRQs is also revisited using the two variables off'and 0. The Lorenz factors are in the range of 2.33 to 64.07. The viewing angles are in the range of 0.04 to 24.56. The averaged value of the viewing angle for BL Lacs is slightly larger than that for FSRQs, while the averaged value of the Lorentz factor for BL Lacs is smaller than that for FSRQs.展开更多
Based on Bhatia＇s multi-dimensional analytical framework for discourse analysis, we explore key issues involved in genres construction such as private intention, manipulation of generic value and interdiscursive stra...Based on Bhatia＇s multi-dimensional analytical framework for discourse analysis, we explore key issues involved in genres construction such as private intention, manipulation of generic value and interdiscursive strategies. Two prefaces and two book reviews by expert linguists were collected and analyzed at great length from both text-internal and text-external perspectives. Meanwhile, four professionals from relevant disciplines were interviewed for their insights into the issues investigated. Through examining textual features, covert interdiscursivity and narrative accounts of the professional writers, the following findings are generated. 1） Generic variation occurs within and between the two genres due to expert writers＇ intentional manipulation of generic value. 2） Interdiscursive strategies like ＂genre embedding＂, ＂genre bending＂ and ＂genre mixing＂ are exploited by expert writers to achieve their particular private intention. Specifically, preface genre can be presented, to some extent, as a research article mixed with some promotional flavor, and features of research article genre, promotional genre and introductory genre are found mixed in the review genre. 3） Representations of the preface and book review genres such as linguistic feature, move structure and interdiscursivity are ultimately affected by generic value, authors＇ private intention, professional practice and disciplinary culture. The findings have important implications for ESP/EAP writing practitioners and learners.展开更多
文摘Through the analysis and comparison of shortcomings and advantages of existing technologies on object modeling in 3D applications,we propose a new modeling method for virtual scene based on multi-view image sequence to model irregular objects efficiently in 3D application.In 3D scene,this method can get better visual effect by tracking the viewer's real-time perspective position and projecting the photos from different perspectives dynamically.The philosophy of design,the steps of development and some other relevant topics are discussed in details,and the validity of the algorithm is analyzed.The results demonstrate that this method represents more superiority on simulating irregular objects by applying it to the modeling of virtual museum.
基金supported by the National Natural Science Foundation of China (Grant Nos. 10633010 and 11173009)the National Basic Research Program of China (Grant No. 2007CB 815405)+4 种基金the Bureau of Education of Guangzhou Municipality (Grant No. 11 Sui-Jiao-Ke[2009])Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme(GDUPS) (2009), Yangcheng Scholar Funded Scheme (Grant No.10A027S)Hunan Provincial Natural Science Foundation of China (Grant No. 10JJ3020)the Fund of the 11th Five-year Plan for Key Construction Academic Subject (Optics) of Hunan Provincethe research fund of Hunan University of Arts and Science (Grant No. JJZD201101)
文摘In this paper, a sample including 68 blazars (18 BL Lacs and 50 FSRQs) with known Doppler factors and superluminal velocity from our previous papers is presented. Both the Lorentz factors (/') and viewing angles (0) are estimated for the 68 sources The relationship between BL Lacs and FSRQs is also revisited using the two variables off'and 0. The Lorenz factors are in the range of 2.33 to 64.07. The viewing angles are in the range of 0.04 to 24.56. The averaged value of the viewing angle for BL Lacs is slightly larger than that for FSRQs, while the averaged value of the Lorentz factor for BL Lacs is smaller than that for FSRQs.
基金supported by China National Social Sciences Grant entitled A Genre-based Study of the Dynamic Interdiscursive System in Chinese and English Professional Discourse(NO.17BYY033)
文摘Based on Bhatia＇s multi-dimensional analytical framework for discourse analysis, we explore key issues involved in genres construction such as private intention, manipulation of generic value and interdiscursive strategies. Two prefaces and two book reviews by expert linguists were collected and analyzed at great length from both text-internal and text-external perspectives. Meanwhile, four professionals from relevant disciplines were interviewed for their insights into the issues investigated. Through examining textual features, covert interdiscursivity and narrative accounts of the professional writers, the following findings are generated. 1） Generic variation occurs within and between the two genres due to expert writers＇ intentional manipulation of generic value. 2） Interdiscursive strategies like ＂genre embedding＂, ＂genre bending＂ and ＂genre mixing＂ are exploited by expert writers to achieve their particular private intention. Specifically, preface genre can be presented, to some extent, as a research article mixed with some promotional flavor, and features of research article genre, promotional genre and introductory genre are found mixed in the review genre. 3） Representations of the preface and book review genres such as linguistic feature, move structure and interdiscursivity are ultimately affected by generic value, authors＇ private intention, professional practice and disciplinary culture. The findings have important implications for ESP/EAP writing practitioners and learners.
