1,722,210 research outputs found
A Cross-Linguistic Exploration of Context Updating Mechanisms
No full textSoftcover, 17x24Presupposition is what people make use of on a daily basis. It is therefore crucial to comprehend how a presupposition gets projected in a sentence. This thesis focuses on three major presupposition projection mechanisms, namely left-right asymmetric, symmetric and hierarchical approaches. For the reason that the majority of previous research is undertaken on the basis of English data, this thesis evaluates these mechanisms employing Japanese and Chinese empirical evidence. The analyses and experimental data in this thesis confirm that, firstly, the left-right asymmetric account which is substantiated by English empirical evidence is not tenable in Japanese and Chinese. Secondly, the symmetric approach appears to be promising in both English and Japanese, though it has not been sufficiently investigated. Thirdly, the hierarchical framework can account for English, Japanese and Chinese empirical evidence preliminarily. Much more attention should be paid to the hierarchical approach to presupposition projection in further studies. Further investigation into this topic can deepen the comprehension of human language and language processing
Distancecut: Interactive real-time segmentation and matting of images and videos
No full textBai, Xue; Sapiro, Guillermo. (2007). Distancecut: Interactive real-time segmentation and matting of images and videos. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/4355
Geodesic matting: a framework for fast interactive image and video segmentation and mapping
No full text1 online resource (PDF, 27 pages; includes illustrations)Bai, Xue; Sapiro, Guillermo. (2008). Geodesic matting: a framework for fast interactive image and video segmentation and mapping. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/179780
A geodesic framework for fast interactive image and video segmentation and matting
No full textBai, Xue; Sapiro, Guillermo. (2007). A geodesic framework for fast interactive image and video segmentation and matting. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/5381
Fig. 2 in Two new species of Indonemoura (Plecoptera, Nemouridae) from Yunnan Province, China
No full textFig. 2. Indonemoura longihamata Bai & Qian sp. nov., holotype, ♂ (SWFU). A. Habitus, dorsal view. B. Head and prothorax, ventral view. C. Terminalia, dorsal view. D. Terminalia, ventral view. E. Terminalia, lateral view.Published as part of <i>Bai, Xue, Shen, Dan & Qian, Yu-Han, 2022, Two new species of Indonemoura (Plecoptera, Nemouridae) from Yunnan Province, China, pp. 1-9 in European Journal of Taxonomy 823 (1)</i> on page 5, DOI: 10.5852/ejt.2022.823.1809, <a href="http://zenodo.org/record/6619870">http://zenodo.org/record/6619870</a>
Fig. 1 in Two new species of Indonemoura (Plecoptera, Nemouridae) from Yunnan Province, China
No full textFig. 1. Indonemoura yingjiangensis Bai & Qian sp. nov., holotype, ♂ (SWFU). A. Habitus, dorsal view. B. Head and prothorax, ventral view. C. Terminalia, dorsal view. D. Terminalia, ventral view. E. Terminalia, lateral view.Published as part of <i>Bai, Xue, Shen, Dan & Qian, Yu-Han, 2022, Two new species of Indonemoura (Plecoptera, Nemouridae) from Yunnan Province, China, pp. 1-9 in European Journal of Taxonomy 823 (1)</i> on page 3, DOI: 10.5852/ejt.2022.823.1809, <a href="http://zenodo.org/record/6619870">http://zenodo.org/record/6619870</a>
Numerical Estimation of Asymmetry of In-Cylinder Flow in a Light Duty Direct Injection Engine with Re-Entrant Piston Bowl
Full text linkPartially premixed combustion (PPC) can be applied to decrease emissions and increase fuel efficiency in direct injection, compression ignition (DICI) combustion engines. PPC is strongly influenced by the mixing of fuel and oxidizer, which for a given fuel is controlled mainly by (a) the fuel injection, (b) the in-cylinder flow, and (c) the geometry and dynamics of the engine. As the injection timings can vary over a wide range in PPC combustion, detailed knowledge of the in-cylinder flow over the whole intake and compression strokes can improve our understanding of PPC combustion. In computational fluid dynamics (CFD) the in-cylinder flow is sometimes simplified and modeled as a solid-body rotation profile at some time prior to injection to produce a realistic flow field at the moment of injection. In real engines, the in-cylinder flow motion is governed by the intake manifold, the valve motion, and the engine geometry. The deviation of the real in-cylinder flow from a solid body rotation flow field varies with different piston positions. This paper reports on an CFD study of the formation and development of a real engine in-cylinder flow field in an optical light duty PPC engine from the opening of the intake valve at -360 CAD ATDC up to 20 CAD ATDC in a motored case (without fuel injection). The focus is put on the analysis of the temporal and spatial development of the swirl flow motion. The resulting flow field of the simulation is compared with the results from CFD simulation of an initial axially symmetric (sector-mesh) flow in the cylinder. The adequateness of sector type mesh including solid-body rotation assumption as an initial flow is analyzed
Effects of fuel cetane number on the structure of diesel spray combustion: An accelerated Eulerian stochastic fields method
Full text linkAn Eulerian stochastic fields (ESF) method accelerated with the chemistry coordinate mapping (CCM) approach for modelling spray combustion is formulated, and applied to model diesel combustion in a constant volume vessel. In ESF-CCM, the thermodynamic states of the discretised stochastic fields are mapped into a low-dimensional phase space. Integration of the chemical stiff ODEs is performed in the phase space and the results are mapped back to the physical domain. After validating the ESF-CCM, the method is used to investigate the effects of fuel cetane number on the structure of diesel spray combustion. It is shown that, depending of the fuel cetane number, liftoff length is varied, which can lead to a change in combustion mode from classical diesel spray combustion to fuel-lean premixed burned combustion. Spray combustion with a shorter liftoff length exhibits the characteristics of the classical conceptual diesel combustion model proposed by Dec in 1997 (http://dx.doi.org/10.4271/970873), whereas in a case with a lower cetane number the liftoff length is much larger and the spray combustion probably occurs in a fuel-lean-premixed mode of combustion. Nevertheless, the transport budget at the liftoff location shows that stabilisation at all cetane numbers is governed primarily by the auto-ignition process
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
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