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Active mass driver control system for suppressing wind-induced vibration of the Canton Tower
Huai-bing Xu,Jin-ping Ou,Chun-wei Zhang,Hui Li,Ping Tan,Fu-lin Zhou 국제구조공학회 2014 Smart Structures and Systems, An International Jou Vol.13 No.2
In order to suppress the wind-induced vibrations of the Canton Tower, a pair of active mass river (AMD) systems has been installed on the top of the main structure. The structural principal directions n which the bending modes of the structure are uncoupled are proposed and verified based on the rthogonal projection approach. For the vibration control design in the principal X direction, the simplified odel of the structure is developed based on the finite element model and modified according to the field measurements under wind excitations. The AMD system driven by permanent magnet synchronous linear otors are adopted. The dynamical models of the AMD subsystems are determined according to the pen-loop test results by using nonlinear least square fitting method. The continuous variable gain feedback VGF) control strategy is adopted to make the AMD system adaptive to the variation in the intensity of wind excitations. Finally, the field tests of free vibration control are carried out. The field test results of AMD control show that the damping ratio of the first vibration mode increases up to 11 times of the original value without control.
Active mass driver control system for suppressing wind-induced vibration of the Canton Tower
Xu, Huai-Bing,Zhang, Chun-Wei,Li, Hui,Tan, Ping,Ou, Jin-Ping,Zhou, Fu-Lin Techno-Press 2014 Smart Structures and Systems, An International Jou Vol.13 No.2
In order to suppress the wind-induced vibrations of the Canton Tower, a pair of active mass driver (AMD) systems has been installed on the top of the main structure. The structural principal directions in which the bending modes of the structure are uncoupled are proposed and verified based on the orthogonal projection approach. For the vibration control design in the principal X direction, the simplified model of the structure is developed based on the finite element model and modified according to the field measurements under wind excitations. The AMD system driven by permanent magnet synchronous linear motors are adopted. The dynamical models of the AMD subsystems are determined according to the open-loop test results by using nonlinear least square fitting method. The continuous variable gain feedback (VGF) control strategy is adopted to make the AMD system adaptive to the variation in the intensity of wind excitations. Finally, the field tests of free vibration control are carried out. The field test results of AMD control show that the damping ratio of the first vibration mode increases up to 11 times of the original value without control.
Man Zhang,Su‑Su Li,Qiao‑Mei Xie,Jian‑Hua Xu,Xiu‑Xiu Sun,Fa‑Ming Pan,Sheng‑Qian Xu,Sheng‑Xiu Liu,Jin‑Hui Tao,Shuang Liu,Jing Cai,Pei‑Ling Chen,Long Qian,Chun‑Huai Wang,Chun‑Mei Liang,Hai‑Liang Huang,Ha 한국유전학회 2018 Genes & Genomics Vol.40 No.10
Although the current glucocorticoids (GCs) treatment for systemic lupus erythematosus (SLE) is effective to a certain extent, the difference in therapeutic effect between patients is still a widespread problem. Some patients can have repeated attacks that greatly diminish their quality of life. This study was conducted to investigate the relationship between HSP90AA2 polymorphisms and disease susceptibility, GCs efficacy and health-related quality of life (HRQoL) in Chinese SLE patients. A case–control study was performed in 470 SLE patients and 470 normal controls. Then, 444 patients in the case group were followed up for 12 weeks to observe efficacy of GCs and improvement of HRQoL. Two single nucleotide polymorphisms (SNPs) of HSP90AA2 were selected for genotyping: rs1826330 and rs6484340. HRQoL was assessed using the SF-36 questionnaire. The minor T allele of rs1826330 and the TT haplotype formed by rs1826330 and rs6484340 showed associations with decreased SLE risk (T allele: PBH = 0.022; TT haplotype: PBH = 0.033). A significant association between rs6484340 and improvement of HRQoL was revealed in the follow-up study. Five subscales of SF-36 were appeared to be influenced by rs6484340: total score of SF-36 (additive model: PBH = 0.026), physical function (additive model: PBH = 0.026), rolephysical (recessive model: PBH = 0.041), mental health (dominant model: PBH = 0.047), and physical component summary (additive model: PBH = 0.026). No statistical significance was found between HSP90AA2 gene polymorphisms and GCs efficacy. These results revealed a genetic association between HSP90AA2 and SLE. Remarkably, HSP90AA2 has an impact on the improvement of HRQoL in Chinese population with SLE.
Property Studies of Optical Waveguide Formed by keV He-Ion Implanted into a Nd:CNGG Crystal
Chunxiao Yu,Jin-Hua Zhao,Huai-Jin Zhang,Xue-Lin Wang 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.6
A planar optical waveguide was formed in a neodymium-doped calcium niobium gallium garnet (Nd:CNGG) crystal by using 500-keV He-ion implantation with a dose of 2 × 1016 ions/cm2 at room temperature. The dark modes were observed by using a prism coupling method, and the refractive index profile was reconstructed using a reflectivity calculation method (RCM). The SRIM2006 code (stopping and range of ions in matters, code 2006) was used to simulate the damage profile in the ion-implanted sample. The photoluminescence spectra of the samples showed fairly good potential for used as a laser waveguide.
Qiang Cao,Shumin He,Yuanyuan Deng,Dapeng Zhu,Xiaodong Cui,Guolei Liu,Huai-Jin Zhang,Shishen Yan,Yanxue Chen,Liangmo Mei 한국물리학회 2014 Current Applied Physics Vol.14 No.5
Raman scattering spectroscopy has been performed on high quality Co-doped ZnO epitaxial films, which were grown on Al2O3 (0001) by oxygen-plasma assisted molecular beam epitaxy. Raman measurements revealed two local vibration modes (LVMs) at 723 and 699 cm1 due to the substitution of Co2þ in wurtzite ZnO lattice. The LVM at 723 cm1 is found to be an elemental sensitive vibration mode for Co substitution. The LVM at 699 cm1 can be attributed to enrichment of Co2þ bound with oxygen vacancy, the cobalteoxygen vacancyecobalt complexes, in Zn1xCoxO films associated with ferromagnetism. The intensity of LVM at 699 cm1, as well as saturated magnetization, enhanced after the vacuum annealing and depressed after oxygen annealing.