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24 results on '"Yang, Tian-Li"'

2. Research Progress on Tribology of Sliding Plate Materials for Bridge Bearings

Author

ZHAN Shengpeng, LI Ruize, MA Changfei, JIA Dan, DUAN Haitao, JING Guoqiang, MA Lixin, YANG Tian, LI Xiaojing

Subjects
bridge bearing, ptfe, uhmwpe, tribology, Materials of engineering and construction. Mechanics of materials, TA401-492, Technology
Abstract

The sliding plate material of bridge bearing is the key part to realize the bearing， sliding and rotation of bridge bearing.This paper expounded the structure and working condition characteristics of sliding plate for bridge bearing， introduced the influence of different extreme environments on the service life and tribological properties of bridge bearing materials， summarized the research status and development trends of polytetrafluoroethylene， ultra-high molecular weight polyethylene and other typical sliding plate materials for bridge bearing， and compared their similarities and differences.On this basis， the future development trend of tribological properties of sliding plate materials for bridge bearing was analyzed.

Published
2023
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8. Interfacial coupling effects in g-C3N4/InxSb2−xS3 heterojunction for enhanced photocatalytic activity under visible light.

Author

Yang, Ting, Hu, Xin-yu, Wang, Jun-tao, Yang, Tian-li, and Wang, Wen-lei

Abstract

Copyright of Journal of Central South University is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2022
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9. Numerical Analysis of the Water Flow Characteristics of the Port Gate Area of the Madian Hub Locks.

Author

ZHAO Yang-jun, SU Ye-ping, DING Hao, WANG Zhen-hua, YANG Tian-li, and YANG Fan

Subjects
WATER analysis, NUMERICAL analysis, WATER diversion, PUMPING stations, HARBORS
Abstract

In order to clarify the influence of the operation of the sluice gate and the diversion pump station on the navigation flow conditions in the entrance area of the ship lock approach channel after the completion of the Madian Water Control Project, the SMS (Surface grater Modeling System) hydrodynamic software was used to numerically analyze the flow field characteristics in the entrance area of the upstream and downstream approach channels of the ship lock under three different operating conditions. The results show that in the Madian hydro-junction project, the flow conditions in the upper approach channel entrance area of the lock are good under the check condition of the flood discharge of the lock, and there is a large lateral velocity in the local area of the downstream approach channel entrance area. In the check condition of lock diversion, the lateral velocity in the local area of the upstream approach channel entrance does not meet the requirements, and the flow condition in the downstream approach channel entrance is good. In the water diversion condition of the pump station, there are some oblique flow near the end of the water partition wall near the side of the pump station in the upstream and downstream approach channel of the lock. It is suggested to increase the arc vertical separation facilities at the end of the water partition wall of the upstream and downstream approach channel. The conclusions provide a certain reference for the operation of Madian hub project. [ABSTRACT FROM AUTHOR]

Published
2022

10. Study on the Poisson’s Ratio of Solid Rocket Motor by the Visual Non-Contact Measurement Teleoperation

Author

Yang-tian Li, Yu-Biao Li, and Hai-Bin Li

Subjects
Engineering, Laplace transform, business.industry, Mathematical analysis, Measure (physics), Relaxation (iterative method), Inverse Laplace transform, Poisson distribution, Viscoelasticity, Poisson's ratio, symbols.namesake, Control theory, symbols, Time domain, business
Abstract

Measurement of Poisson’s ratio play an important role in the parametric and structure analysis of viscoelastic material. In order to accurately determine the Poisson’s ratio of a solid rocket motor grain, the integral expression of Poisson’s ratio of viscoelastic material in time domain is firstly derived using Laplace transform, inverse Laplace transform and inheritance integration. The measure of the relaxation (creep) modulus of the viscoelastic material specimen is performed by using the dynamic mechanical thermal analyser, and 3D visual non-contact method is used to measure the strain. Experiment data obtained from these tests are then substituted into the theoretical formula derived from the integral expression. Time varying curve of a certain type viscoelastic material Poisson’s ratio and the Prony series form to facilitate further processing are obtained using MATLAB software. The results are demonstrated consistent with results of traditional method. This method provides an effective way for high accuracy measurement of Poisson’s ratio of viscoelastic materials.

Published
2017
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12. Dielectronic recombination rate coefficient for Cu-like Au 50+ ion

Author

Jiang Gang, Zhu Zheng-He, and Yang Tian-Li

Subjects
Free electron model, Physics, Excited state, General Physics and Astronomy, Electron temperature, Resonance, Electron, Atomic physics, Excitation, Recombination, Ion
Abstract

The rate coefficients αDR of dielectronic recombination (DR) for Cu-like Au50+ ion collided with the incident free electron are calculated based on the quasi-relativistic multi-configuration Hartree–Fock theory. The results clearly show that the αDR of all recombination channels exhibits resonance characters with electron temperature. At lower temperatures, the recombination for electrons caused by 4s excitation is dominant through outer electron radiative transitions among the intermediate doubly excited autoionizing levels, in which the most components come from 3d105pns states, whereas with increasing electron temperature, DR caused by 3d excitation turns out to be dominant and the contribution from the 3d94s4fnf state to the total rate coefficient of electron 3d is the largest with αDR = 1.15×10−11 cm3.s−1 at an electron temperature of Te=0.35 keV. Under this condition, there exists a strong competition between the two types of recombination channels.

Published
2004
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14. Average Distribution of Ionic Charges and Ionizability for the Au Plasma System

Author

Zhu Zheng-He, Jiang Gang, and Yang Tian-Li

Subjects
Physics, Distribution (number theory), General Physics and Astronomy, Ionic bonding, Plasma, Laser, Ion, law.invention, law, Ionization, Physics::Atomic Physics, Atomic physics, National laboratory, Quantum
Abstract

Using relativistic multi-configuration Dirac-Fock theory, we calculate the transition data of 3dj-nfj' (n = 5,6,7) for the M-shell from an Ni-like Au ion to an As-like Au ion using the GRASP programme with the core-polarization, quantum electrodynamical effect and Breit correction. Based on the present calculation results and the experiment of the Xingguang-II laser facilities, the average distribution of ionic charge and the ionizability have been derived. The average ionization degree of Au plasma Z* is 49.06±0.5, which is comparable with the result of the Lawrence Livermore National Laboratory.

Published
2002
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