42,902 research outputs found
The role of three-dimensionality in the development of vortex breakdown in swirling flow
No full textDirect numerical simulations of three-dimensional compressible Navier-Stokes equations are conducted using high-order numerical methods in cylindrical coordinates. Aim of the work is to examine the effect of three-dimensionality in the dynamics of vortex breakdown in swirling jets within a specific range of Reynolds numbers. The main elements of vortex breakdown are revealed in our computations, and the interaction between three-dimensional helical instabilities and the axisymmetric process of breakdown is discussed. The results confirm a general tendency of swirling flows to burst into a sequence of bubbles when the Reynolds number is increased. Comparing axisymmetric and fully three-dimensional computations, it's observed the possibility that a single or double helical structure arising in linear regime can work to extract energy from the axisymmetric waves
Bai pin pu wang luo zhong de jing ji xue
No full textLuo, Yuan.Thesis Ph.D. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 273-283).Abstracts also in Chinese.Title from PDF title page (viewed on 01, November, 2016).Luo, Yuan
Frequency domain iterative feedforward/feedback tuning for MIMO ANVC
No full textA new iterative feedback/feed-forward tuning (IFFT) method is presented for multiple-input multiple-output (MIMO) control systems that relies on efficient computation of the negative gradient of the controller cost function in the frequency domain. The iterative method is using only one experiment per iteration and it is therefore suitable for realtime implementation for periodic adjustment of the controller. The primary target application area of the presented method is self-tuning feedback control in active noise and vibration control (ANVC)
Pseudomonodictys aquatica D. F. Bao, K. D. Hyde & Z. L. Luo 2022, sp. nov.
No full textPseudomonodictys aquatica D.F. Bao, K.D. Hyde & Z.L. Luo, sp. nov. FIGURE. 2 Index Fungorum number: IF 559715; Facesoffungi number: FoF 11439 Etymology:—referring to the aquatic habitat of this fungus. Holotype:— MFLU 22–0079 Saprobic on submerged decaying wood. Sexual morph: Ascomata 230–335 µm high, 210–350 µm diam, solitary, scattered, semi-immersed to erumpent, visible as raised, globose to subglobose, black, ostiolate. Ostiole short papillate, with an irregular pore-like opening, brown to dark brown. Peridium composed of several layers of brown to dark brown cells of textura agularis, outer layers merged with the host tissues. Hamathecium composed of 2–3 µm wide, dense, filamentous, branched, septate, hyaline, cellular pseudoparaphyses. Asci (120–)130–161(–180) × 20–23 µm (x̅ = 145.8 × 22.8 µm, n = 30), 8-spored, bitunicate, fissitunicate, clavate, short pedicellate, apically rounded, with an ocular chamber. Ascospores 40–48(–52) × 8–10 µm (x̅ = 44.2 × 8.9 µm, n = 35), overlapping, 2–3-seriate, fusiform to cylindrical with round ends, slightly curved, (6–)8-septate, strongly constricted at the septa, narrow towards the both ends, enlarged at the 4 th and 5 th cells from the apex, smooth-walled, hyaline, with small guttules, surrounded by a distinct, thick, mucilaginous sheath (3–8 µm wide). Asexual morph: Undetermined. Culture characteristics: —Ascospores germinated on PDA within 24 h. Reach 30 mm diam. in 30 days at room temperature, surface rough, with dense mycelia, dry, grey at the margin and center, dark grey to dark brown at the middle from above; grey at the margin and dark brown at middle from below; not producing pigmentation in culture. Material examined: — Thailand, Chiang Rai Province, on decaying wood submerged in a small stream, 7 March 2021, D. F. Bao, 2 CR 17 (MFLU 22–0079, holotype); ex-type living culture, MFLUCC 22–0018. Thailand, Chiang Rai Province, on decaying wood submerged in a small stream, 7 March 2021, D. F. Bao, 2 CR 19 (KUN-HKAS 124177, paratype); living culture, MFLUCC 22–0019.Published as part of Bao, Dan-Feng, Hongsanan, Sinang, Hyde, Kevin D., Luo, Zong-Long & Nalumpang, Sarunya, 2022, Pseudomonodictys aquatica sp. nov., the sexual morph of Pseudomonodictys from freshwater habitats, pp. 222-232 in Phytotaxa 567 (3) on page 227, DOI: 10.11646/phytotaxa.567.3.2, http://zenodo.org/record/715667
LDP and CLT for SPDEs with transport noise
No full textIn this work we consider solutions to stochastic partial differential equations with transport noise, which are known to converge, in a suitable scaling limit, to solution of the corresponding deterministic PDE with an additional viscosity term. Large deviations and Gaussian fluctuations underlying such scaling limit are investigated in two cases of interest: stochastic linear transport equations in dimension and 2D Euler equations in vorticity form. In both cases, a central limit theorem with strong convergence and explicit rate is established. The proofs rely on nontrivial tools, like the solvability of transport equations with supercritical coefficients and -convergence arguments
Data and scripts from: Room temperature optically detected magnetic resonance of single spins in GaN
No full textPlease cite as:
Jialun Luo, Yifei Geng, Farhan Rana, and Gregory D. Fuchs. (2024) Data and scripts from: Room temperature optically detected magnetic resonance of single spins in GaN Dataset. [dataset] Cornell University eCommons Repository. https://doi.org/10.7298/azf0-hc03These files contain data and analysis code supporting all results reported in "Room temperature optically detected magnetic resonance of single spins in GaN" by Luo et al. In Luo et al. we found: High contrast optically detected magnetic resonance (ODMR) is a valuable property for reading out the spin of isolated defect color centers at room temperature. Spin-active single defect centers have been studied in wide bandgap materials including diamond, SiC, and hBN; each with associated advantages for applications. We report the discovery of ODMR in two distinct species of bright, isolated defect centers hosted in GaN. In one group, we find negative ODMR of a few percent associated with a metastable electronic state, whereas in the other, we find positive ODMR of up to 30% associated with the ground and optically excited electronic states. We examine the spin symmetry axis of each defect species and we establish coherent control over a single defect’s ground-state spin. Given the maturity of the semiconductor host, these results are promising for scalable and integrated quantum sensing applicationsNational Science Foundation (NSF) - ECCS-1839196 [Fuchs]
National Science Foundation (NSF) - DMR-1719875 [Fuchs]
Cornell Engineering Sprout Program [Fuchs]
National Science Foundation (NSF) - ECCS-1839196 [Luo]
National Science Foundation (NSF) - DMR-1719875 [Luo]
Cornell Engineering Sprout Program [Luo]
National Science Foundation (NSF) - ECCS-1839196 [Geng]
National Science Foundation (NSF) - DMR-1719875 [Geng]
National Science Foundation (NSF) - ECCS-1839196 [Rana]
National Science Foundation (NSF) - DMR-1719875 [Rana
Luo Bo's adventure
No full textLuo Bo’s Adventure is a 3-D open world indie adventure role playing game that is set in sunny island Singapore, where the player plays as Luo Bo, a chef bunny who arrives at Singapore to meet her grandmother whom she calls Ah Ma. This project is designed to introduce and pay tribute to some of Singapore’s local delights through gameplay and simultaneously explore ways to create an immersive gameplay without heavy game controls.Bachelor of Fine Arts in Media Ar
Droplet collision simulation by multi-speed lattice Boltzmann method
No full textRealization of the Shan-Chen multiphase flow lattice Boltzmann model is considered in the framework of the higher-order Galilean invariant lattices. The present multiphase lattice Boltzmann model is used in two dimensional simulation of droplet collisions at high Weber numbers. Results are found to be in a good agreement with experimental findings
Esempio di rappresentazione del sé in Lu Ling 路翎, Luo Dadou de yisheng 罗大斗的一生 (La vita di Luo Dadou)
No full textIn the story Luo Dadou’s life (Luo Dadou de yisheng 罗大斗的一生), Lu Ling 路翎 (1923-1994) gives shape to the deepness of human psyche and stresses the suffering of the Self of his age by giving a brilliant emphasis to human individuality. The author succeeds in doing so by creating an amazing psychological characterization of the main character, both by means of words and by means of grammatical structures. By applying Denton’s categories for the study of the Self in modern Chinese literature, I analysed Lu Ling’s short story from the Freudian and Kleinian psychodynamic perspective, so to demonstrate how Lu Ling enters his characters’ minds and wonderfully recreates the psychological dynamics inside and between them
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