6,723 research outputs found
Ping jing guan cong shu /
No full textDouble leaves, oriental style, in case.Lanling Sun zhi can ban.Mode of access: Internet
Wei sun zhai shi chao.
No full text姚琮.綫裝."乙酉四月刊于陪都"--題字頁背.Yao Cong.Xian zhuang."Yi you si yue kan yu pei du"--Ti zi ye bei
Ping jing guan cong shu /
No full textDouble leaves, oriental style, in case.Lanling Sun zhi xing yan yuan ban ; Wu Xian Zhu shi huai lu jia shu cang ban.Mode of access: Internet
Shakespeare and Space
No full textCo-editor of book, with Cong Cong, and author of the chapter 'London, Stratford, Coventry: Shakespearean theatre and the spaces of history
Development of a special multi-wavelength pyrometer for temperature distribution measurements in rocket engines
No full textPreviously a fast multi-wavelength pyrometer was developed in a collaboration between the Harbin Institute of Technology of China and Rome University of Italy. The main features of the instrument include the use of a dispersing prism and a photodiode array to cover the entire spectral band. Following this experience, a new type of six-target eight-wavelength pyrometer for solid propellant rocket engine plume temperature distribution measurements has been developed. The instrument can record the radiation fluxes of eight wavelengths for six different uniformly distributed points on the target surface, which are well defined by holes on a field stop. The fast pyrometer with a specially designed synchronous data acquisition system can assure that the recorded thermal radiation fluxes of different spectral regions are at the same time and the same true temperature, even with dramatically changed targets
Numerical study of relationships between flows and structural characteristics of the rotor in a rim-driven hubless thruster using a strongly-coupling FSI algorithm
No full textThe shaftless rim-driven thruster (RDT), as a new type of ship propulsion method, has attracted more and more attention in recent years. In this study, RDT was employed. Firstly, the open water performance of RDT with rigid blade was numerically studied based on the Detached Eddy Simulation (DES). Subsequently, A two-way fluid- structure interaction (FSI) method was adopted to simulate the effects of four flexible blades on the hydrodynamic performance and pulsating pressure. The differences between the hydrodynamic coefficients, flow fields, von Mises stress (VMS), blade deformation, and excitation forces of the flexible and rigid RDT were analyzed. The results show that the blade deformation leads to the loss of thrust and overall efficiency, and the smaller the Young's modulus, the greater the loss of thrust and overall efficiency. As the Young's modulus decreases, the blade deformation in the axial, tangential and radial directions increases, and blade deformation in the axial plays a dominant role in the three directions. Compared with the rigid RDT, blade deformation increases the pulsating pressure of the upstream freestream of blade and weakens the pulsating pressure of the downstream freestream of blade. These findings will provide a reference for the design and optimization of RDT rotor
Probabilistic Short-term Wind Forecasting Based on Pinball Loss Optimization
No full textFull text access from Treasures at UT Dallas is restricted to current UTD affiliates (use the provided Link to Article).Probabilistic wind power forecasts that quantify the uncertainty in wind output have the potential to aid in the economic grid integration of wind power at large penetration levels. In this paper, a novel probabilistic wind forecasting approach based on pinball loss optimization is proposed, in conjunction with a multi-model machine learning based ensemble deterministic forecasting framework. By assuming the point-forecasted value as the mean at each point, one unknown parameter (i.e., standard deviation) of a predictive distribution at each forecasting point is determined by minimizing the pinball loss. A surrogate model is developed to represent the unknown distribution parameter as a function of deterministic forecasts. This surrogate model can be used together with deterministic forecasts to predict the unknown distribution parameter and thereby generate probabilistic forecasts. Numerical results of case studies show that the proposed method has improved the pinball loss by up to 35% compared to a baseline quantile regression forecasting model. © 2018 IEEE.National Renewable Energy Laboratory under Subcontract No. XGJ-6-62183-01 (under the U.S. Department of Energy Prime Contract No. DE-AC36-08GO28308).Erik Jonsson School of Engineering and Computer Scienc
Propagation and damping of Alfvén waves in low solar atmosphere
No full textPropagation and damping of Alfvén waves in the inner solar corona are studied using a 2D magnetohydrodynamics (MHD) simulation code with realistic density and temperature profiles in a uniform background magnetic field. A linear wave is launched by ascribing a sinusoidal fluid motion at about 1000 km from the surface of the Sun, which is shown to generate Alfvénic wave motions along the height. The 2D MHD simulation shows that for B0 ≈ 3G, Alfvén waves of about 10-2 Hz with an infinite horizontal length-scale can penetrate into the corona, transferring about 90 per cent their energies. This raises the possibility that the wave can be dissipated by various physical processes. The results show that the propagating wave can effectively damp via viscosity in the lower region of the corona, if a horizontal scale of granular size is incorporated. © 2017 The Author
sj-docx-1-evb-10.1177_11769343221134400 – Supplemental material for Distribution, Phylogeny and Evolution of Clinical and Environmental Vibrio vulnificus Antibiotic-Resistant Genes
No full textSupplemental material, sj-docx-1-evb-10.1177_11769343221134400 for Distribution, Phylogeny and Evolution of Clinical and Environmental Vibrio vulnificus Antibiotic-Resistant Genes by Nan Geng, Guojin Sun, Wen-Jia Liu, Bin-Cheng Gao, Cong Sun, Cundong Xu, Ertian Hua and Lin Xu in Evolutionary Bioinformatics</p
Rezension zu The political economy of science, technology, and innovation in China: policymaking, funding, talent, and organization Yutao Sun and Cong Cao. Cambridge: Cambridge University Press, 2023. 244 pp. £95.00 (hbk). ISBN 9781108490580
No full textThis is a book review of The Political Economy of Science, Technology, and Innovation in China: Policymaking, Funding, Talent, and Organization, Yutao Sun and Cong Cao. Cambridge: Cambridge University Press, 2023. 244 pp. £95.00 (hbk). ISBN 9781108490580. The review has been published in The China Quarterly
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