5,397 research outputs found
The complete chloroplast genome of the brown alga Saccharina sp. ye-B (Laminariaceae: Phaeophyceae) from Sakhalin, Russia
No full textThe complete chloroplast genome sequence of Saccharina sp. ye-B was determined using Illumina sequencing data. The chloroplast genome of Saccharina sp. ye-B is 130,587 bp in length, containing 139 protein-coding genes (PCGs), 3 ribosomal RNAs (rRNAs), and 28 transfer RNAs (tRNAs) genes. The phylogenetic reconstruction based on the chloroplast genomes of 11 brown algae resolves Saccharina sp. ye-B in a fully supported clade with S. japonica. The determination of the chloroplast genome of Saccharina sp. ye-B will benefit future algal genetics, evolution, and systematic studies in the Laminariaceae
[[alternative]]Lian...dou/ye Construction
No full text[[abstract]]The thesis deals with the ‘lian…dou/ye …’ construction in modern Chinese. In order to clarify the informational status of ‘lian…’, issues on topic and focus are shown in the first part of this thesis. Then, discussions on semantic functions and conversational implicatures of this construction constitute the sencond part. Lastly, the formal complexity and pedagogical instructions will be presented as well.
Roughness Induced Boundary Layer Transition in Incompressible Flow
No full textThe fluid dynamics process leading to laminar-turbulent transition behind an isolated roughness element is investigated in the incompressible regime using particle image velocimetry. The study covers the effect of roughness size and geometry on the promotion of transition. The measurement domain covers a large streamwise range from the near wake to the onset of the turbulent regime. Planar PIV measurements reveal the basic flow pattern and the turbulent structure of the flow characterizing by the velocity fluctuation statistics (RMS of the streamwise and wall-normal velocity component and Reynolds shear stress). The high Reynolds shear stress level reaching the region near the wall in the downstream area indicates the onset of turbulent boundary layer
Children's stories by Ye Shengtao
No full text(in English) In this master's thesis, we will thoroughly examine two significtant fairy tale collections by the Chinese author Ye Shengtao Daocaoren (1923) and Gudai yingxiong de shixiang (1931). Our motivation is to gain a deeper understanding and appreciation of Ye Shengtao's works for children and explore their didactic value. The first part of the thesis deals with the general historical context of children's literature and the genre of fairy tales, the following part deals with the historical and cultural context focused on the field of education in China. Our goal is to explore and understand the views of Chinese intellectuals at the beginning of the 20th century, as well as Western educators, and gain a deeper understanding of Ye Shengtao's pedagogical work and his pedagogical inspirations. In the analytical part, we then determine and examine the main motifs of Ye Shengtao's fairy tales and address the question of how Ye Shengtao uses and transforms literary elements and motifs from Western authors' fairy tales. As a part of the analysis, we will also focus on the structure of the stories in these collections, and we also examine the characteristics of the characters and the environment in order to understand the author's didactic motivations in his realistic portrayal of the fairy tale world
Numerical investigation of energy deposition for supersonic flow over a 2-D diamond-shaped airfoil
No full textThe research models inviscid compressible flow at Mach 2 over a two dimensional diamond-shaped airfoil. The objective is to study the interaction of the energy deposition added in the upstream flow on the airfoil. Theoretical results without energy deposition in the inlet boundary and numerical results with no filaments, infinitely long symmetric filament, symmetric pulsed filament, and asymmetric pulsed filament, for Mach number, temperature, pressure in the flow field domain, are obtained. An analysis is performed on the drag coefficient acting on the airfoil. FLUENT, Gambit, and C++ are used for the numerical simulation.M.S.Includes bibliographical referencesby Ye Zh
Liu wang qu: ge, ge ju.
No full text江陵詞 ; 雪厂曲 ; 集體編劇雪厂, 葉瓊, 江凌.Music in number notation.Jiang Ling ci ; Xuechang qu ; ji ti bian ju Xuechang, Ye Qiong, Jiang Ling
Boundary layer transition induced by distributed roughness array
No full textThe effects of a finite, spanwise-periodic array of cylindrical roughness elements on boundary layer transition over a NACA 0012 airfoil are investigated at a chord-based Reynolds number of 1.44×105 by using hotwire anemometry and infrared thermography. Both the number and the spanwise spacing of roughness elements in the array are varied in order to study their effect on the wake flow topology. Spanwise interaction between the roughness elements has an effect on the connection and the merging of neighbouring low-speed regions, which results in the formation of merged low-speed blobs (MLSs) that modify the spatial distribution and the amplitudes of the velocity streaks. When the spanwise distance between adjacent roughness elements equals 1.5 times the cylinder diameter, the transition location moves rapidly upstream. In this case, the two neighbouring low-speed regions overlap with each other in the near wake of the roughness, leading to the maximum growth in the velocity streak amplitude and the velocity fluctuations. The number of roughness elements affects the total number of MLSs within the boundary layer. For a single MLS behind a pair of cylinders, the Kelvin-Helmholtz instability dominates the growth of velocity fluctuations around the three-dimensional shear layers. When three cylinders are placed in the array, two MLSs appear in the near wake, which coalesce in to one low-speed blob downstream before the onset of transition, revealing the importance of Kelvin-Helmholtz instability.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Wind Energ
Liu Ye - the book paintings
No full textThe Beijing-based artist Liu Ye is known for his precise, deftly rendered representational paintings. Drawn equally from contemporary culture and old master painting, Liu's wide-ranging visual touchstones include Piet Mondrian, Miffy the Bunny, and Prada advertisements. In this new publication devoted to his book paintings, the artist examines the book as both a physical object and cultural totem. Playing with geometry and perspective, Liu creates extraordinary and disorienting portraits of this most familiar subject. Liu's Book Painting series, begun in 2013, depicts close-up views of books that are turned open to reveal empty pages, an approach that emphasizes the object's form over its content. Rendering books' material structure--endpapers, binding, spine--in sensual detail, these paintings indicate an obsession with the book as an object and a lifelong love of literature. Liu's father was a children's book author who introduced him to Western writers at a young age, fueling his curiosity and imagination. Many of the books in Liu's father's collection were banned in Cultural Revolution-era China and the artist read them secretly throughout his childhood. This formative experience figures in his popular Banned Books series and in his book paintings in genera
Effect of Surface Roughness Geometry on Boundary-Layer Transition and Far-Field Noise
No full textSurface roughness elements are often used to force laminar to turbulent transition in aerodynamic and aeroacoustic wind-tunnel experiments. The statistical features and spectral content of the pressure fluctuations in the resulting turbulent boundary layer at the trailing edge can affect far-field noise. To elucidate this dependence, boundary-layer transition induced by randomly distributed roughness elements and a zigzag strip of the same height over a NACA 0012 airfoil is investigated experimentally. The effects of roughness geometry on the near-field flow topology, transition location, and far-field noise are addressed in the common experimental setting for the first time. For a fixed roughness height, distributed roughness elements are less effective in forcing transition than the zigzag strip at low freestream velocity (u∞<20 m/s). As u∞ increases, the transition front for the distributed roughness elements moves closer to the roughness location, reaching the same or even further upstream locations compared to the transition onset in the presence of the zigzag strip. The far-field noise depends on the transition location. For u∞≤20 m/s, a higher noise level is measured for the distributed roughness elements with respect to the zigzag strip. In contrast, for u∞>20 m/s, the earlier onset of transition with the distributed surface roughness leads to a lower noise level than that with the zigzag strip. The data confirm that an adequate characterization of the boundary-layer transition is necessary when measuring the far-field noise during wind-tunnel experiments.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Wind Energ
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