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RISS 인기검색어
- 검색키워드
- 저자 : Zhang Weixiong (검색결과 4 건)
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Wu Zhang,Changlei Lv,Weixiong Liu,Xinqian Zhang,Feiyan Han 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.4
This study describes a method for establishing the model of a circular arc wire rope with special-shaped cross sections, such as oval or triangular, derives the mathematical model for these wire ropes and establishes a three-dimensional (3D) model of one-twelfth circle for them. The wire rope modeling system has been enhanced. The traditional method for drawing the 3D model of the wire rope is to input the wire central line equation into the drawing software (for example, Pro/E) and then sweep, which is tedious and time-consuming. To address this issue, this study develops a software that enables the rapid establishment of a 3D model of steel wire rope by inputting key steel wire rope parameters. Moreover, this software streamlines the wire rope modeling process, increases the wire rope’s design efficiency, and introduces a new method for wire rope modeling.
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Qian Zhang,Lei Han,Weizhen Liu,Weixiong You,Anxian Lu,Zhiwei Luo 한양대학교 세라믹연구소 2021 Journal of Ceramic Processing Research Vol.22 No.1
Development of orange light emitting materials cannot be ignored. In this paper, a novel Tb3+/Sm3+ co-doped P2O5-SrO-BaOZnO-glasses have been prepared. The prepared glasses consisted predominantly of Q2 units, and a small amount of Q0 andQ1 units. For absorption spectra of glasses, eight obvious absorption bands were found. Under the excitation of 402 nm and374 nm xenon lamp, the emission spectra and fluorescence lifetimes of glasses showed big difference. Under the excitation of374 nm xenon lamp, there was significant energy transfer process between Sm3+ and Tb3+ ions in glasses. The fluorescencedecay curves conformed to a double-exponential decay function, the average fluorescence lifetimes of glasses G02 ~ G10 were2.38 ms, 2.67 ms, 1.96 ms, 1.81 ms, and 1.61 ms with the increasing of Sm2O3 content, and the glasses emitted a distinct orangelight. The distinctive properties indicate that this system glass has potential applications in display devices.
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Zhao Yanwei,Luo Xujia,Qin Kemian,Liu Guorui,Chen Daiyuan,Augusto R.S.,Zhang Weixiong,Luo Xiaogang,Liu Chunxian,Liu Juntao,Liu Zhiyi 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.2
Purpose: Muons are characterized by a strong penetrating ability and can travel through thousands of meters of rock, making them ideal to image large volumes and substances typically impenetrable to, for example, electrons and photons. The feasibility of 3D image reconstruction and material identification based on a cosmic ray muons tomography (MT) system with triangular bar plastic scintillator detectors has been verified in this paper. Our prototype shows potential application value and the authors wish to apply this prototype system to 3D imaging. In addition, an MT experiment with the same detector system is also in progress. Methods: A simulation based on GEANT4 was developed to study cosmic ray muons' physical processes and motion trails. The yield and transportation of optical photons scintillated in each triangular bar of the detector system were reproduced. An image reconstruction algorithm and correction method based on muon scattering, which differs from the conventional PoCA algorithm, has been developed based on simulation data and verified by experimental data. Results: According to the simulation result, the detector system’s position resolution is below 1 ~ mm in simulation and 2 mm in the experiment. A relatively legible 3D image of lead bricks in size of 20 cm 5 cm 10 cm used our inversion algorithm can be presented below 1 104 effective events, which takes 16 h of acquisition time experimentally. Conclusion: The proposed method is a potential candidate to monitor the cosmic ray MT accurately. Monte Carlo simulations have been performed to discuss the application of the detector and the simulation results have indicated that the detector can be used in cosmic ray MT. The cosmic ray MT experiment is currently underway. Furthermore, the proposal also has the potential to scan the earth, buildings, and other structures of interest including for instance computerized imaging in an archaeological framework.
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Inhibition of cancer cell growth and migration by dihydroxynaphthyl aryl ketones
Wei Xiong,Yun-Feng Li,Shan Liu,Ting Chen,Hong-Tao Zhang,Zhi-Bin Yang,Ying-Ying Ding,De-Pei Gao,Guan-Shun Wang,Jian Dong,Jian Dong 대한독성 유전단백체 학회 2016 Molecular & cellular toxicology Vol.12 No.4
Dihydroxynaphthyl aryl ketones 1-5 exhibit activity as tubulin polymerization inhibitors by targeting the colchicine binding site of microtubules making them potential anticancer drugs. Therefore, analogues 1-5 have been evaluated for their cytotoxic activity against the cancer cell lines DU-145 (prostate), T24 (bladder) and MCF-7 (breast). notable differences in biological activity were observed for compounds 1-5, most likely related to the nature of the aryl substituent bonded to the carbonyl group. among the tested compounds, only compound 5 showed selectivity for cancer cells over healthy, non-transformed cells. T24 cancer cells treated with compound 5 presented a concentration-dependent decrease in cell proliferation and a loss of migration ability. The cytotoxicity of compounds 1-5 on the selected cell-based assays is discussed in terms of it lipophilicity and polarizability parameters.
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