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Hao, Tianqu,Gao, Feng,Xu, Tao The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.4
A symmetrical component decomposition scheme utilizing the characteristics of the asynchronous rotational reference frame transformation is proposed in this paper for the extraction of the positive and negative sequence components of distorted three-phase grid voltages. The undesired frequency component can be removed using a specially designed series coordinate transformation and half-cycle delays, where the delay can be controlled by adjusting the frequency of the rotating reference frame. The extracted symmetrical component can then be compensated based on the applied coordinated transformation. The dynamic response of the proposed algorithm is improved when compared to that of conventional methods. The effectiveness of the proposed algorithm is verified by simulation and experimental results.
Triterpenoid Saponins from Elsholtzia bodinieri
Hao-bin Hu*,Xu-dong Zheng,Huai-sheng Hu,Yu-feng Jian 대한화학회 2007 Bulletin of the Korean Chemical Society Vol.28 No.9
A new oleanane-type triterpenoid estersaponin, bodinierin C (1), along with two known saponins, mazusaponin I (2) and ciwujianoside C (3), were isolated from the water-soluble part of the root barks of Elsholtzia bodinieri. The structure of bodinierin C was characterized by spectroscopic means and chemical hydrolysis as 3b -O-caffeoyl-23-hydroxylechinocystic acid 28-O-a -L-rhamnopyranosyl-(1 4)-b -D-glucopyranosyl-(1?6)-b -D-glucopyranosyl ester. The known compounds were identified by comparing their spectral data with those of authentic samples or data reported in the literature. All compounds were firstly isolated from Elsholtzia bodinieri family.
Constituents of the Root of Anemone tomentosa
Hao-Bin Hu,Xu-Dong Zheng,Yu-Feng Jian,Jian-Xin Liu,Ji-Hua Zhu 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.7
A new diterpene glycoside, tomentoside I (1), along with eleven known compounds, including the four coumarins, 4,5-dimethoxyl-7-methylcoumarin (2), 4,7-dimethoxyl-5-methylcoumarin (3), isofraxidin (4) and fraxidin (5) as well as the seven triterpenoids, oleanolic acid (6), oleanolic acid 3-O-α-L-arabinopyranoside (7), oleanolic acid 3-O-β-D-galactopyranosyl-(1→3)-β-Dglucopyranoside (8), hederagenin 3-O-α-L-arabinopyranoside (9), betulinic acid (10), 18-hydroxyursolic acid (11) and 2α,3β,23-trihydroxyurs-12-en-28-oic acid (12) were isolated from the ethanolic extract of the root of Anemone tomentosa and their chemical structures were elucidated by spectroscopic methods. The antimicrobial activities of compounds 1-12 were measured using the agar disc-diffusion method. Also, their antioxidant activities against 1,1-diphenyl-2-picrylhydrazyl (DPPH) were evaluated.
Zheng Feng,Hao Wen,Zhaoxia Jiang,Shuai Liu,Xingzhu Ju,Xiaojun Chen,Lingfang Xia,Junyan Xu,Rui Bi,Xiaohua Wu 대한부인종양학회 2018 Journal of Gynecologic Oncology Vol.29 No.5
Objective: To present the surgical outcomes of advanced epithelial ovarian cancer (AEOC) since the implementation of a personalized approach and to validate multiple predictive models for R0 resection. Methods: Personalized strategies included: 1) Non-invasive model: preoperative clinico-radiological assessment according to Suidan criteria with a predictive score for all individuals. Patients with a score 0–2 were recommended for primary debulking surgery (PDS, group A), or otherwise were counseled on the choices of PDS, neoadjuvant chemotherapy (NAC, group B) or staging laparoscopy (S-LPS). 2) Minimally invasive model: S-LPS with a predictive index value (PIV) according to Fagotti. Individuals with a PIV <8 underwent PDS (group C) or otherwise received NAC (group D). Intraoperative assessment (with Eisenkop, peritoneal cancer index [PCI], and Aletti scores) and surgical results were prospectively collected. Results: Between September 2015 and August 2017, 161 pathologically confirmed epithelial ovarian cancer patients were included. A total of 52 (32.3%) patients had a predictive score of 0–2, and 109 (67.7%) patients had a score ≥3. Among these individuals, 41 (25.5%) patients received S-LPS. Finally, 110 (68.3%) patients underwent PDS (A+C), and 51 (31.7%) patients received NAC (B+D). The R0 resection rates in PDS and NAC patients were 56.4% and 60.8%, respectively. The area under the curve (AUC) of Suidan criteria was 0.548 for group (A+C). The AUC of Fagotti score was 0.702 for group C. The AUC of Eisenkop, PCI, and Aletti scores were 0.808, 0.797, and 0.524, respectively. Conclusion: The Suidan criteria were not effective in these AEOC patients. S-LPS was helpful in decision-making for PDS and should be endorsed in the future.
Triterpenoid Saponins from Elsholtzia bodinieri
Hu, Hao-Bin,Zheng, Xu-Dong,Hu, Huai-Sheng,Jian, Yu-Feng Korean Chemical Society 2007 Bulletin of the Korean Chemical Society Vol.28 No.9
A new oleanane-type triterpenoid estersaponin, bodinierin C (1), along with two known saponins, mazusaponin I (2) and ciwujianoside C (3), were isolated from the water-soluble part of the root barks of Elsholtzia bodinieri. The structure of bodinierin C was characterized by spectroscopic means and chemical hydrolysis as 3β -Ocaffeoyl- 23-hydroxylechinocystic acid 28-O-α -L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β- D-glucopyranosyl ester. The known compounds were identified by comparing their spectral data with those of authentic samples or data reported in the literature. All compounds were firstly isolated from Elsholtzia bodinieri family.
Tianqu Hao,Feng Gao,Tao Xu 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.4
A symmetrical component decomposition scheme utilizing the characteristics of the asynchronous rotational reference frametransformation is proposed in this paper for the extraction of the positive and negative sequence components of distortedthree-phase grid voltages. The undesired frequency component can be removed using a specially designed series coordinatetransformation and half-cycle delays, where the delay can be controlled by adjusting the frequency of the rotating referenceframe. The extracted symmetrical component can then be compensated based on the applied coordinated transformation. Thedynamic response of the proposed algorithm is improved when compared to that of conventional methods. The effectiveness ofthe proposed algorithm is verified by simulation and experimental results.
Fu‑Hao Gao,Bin‑Jiang Lv,Tie‑Wei Xu,Ning Cui,Feng Guo 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.11
The effects of low Sn (1.0 wt%) and Mn (0.5 wt%) content on the microstructures and mechanical properties of as-extrudedMg–2Al–1Zn (AZ21) alloys were systematically investigated. The combined addition of Sn and Mn significantly refinedthe grains of the AZ21 alloy, reducing the average grain size from 25.77 to 2.17 μm. The volume fraction of the dynamicallyrecrystallized (DRXed) grains decreased from 78.49 to 43.81% with Sn (1.0 wt%) and Mn (0.5 wt%) addition. The Al8Mn5,Al11Mn4,and Al9Mn4phases were formed in Mg–2Al–1Zn–1Sn–0.5Mn (AZTM2110) alloy, and the Mg17Al12phase disappeared. The orientation relationship between Al9Mn4and Al11Mn4was (002)Al11Mn4//(̄ 302)Al9Mn4, [ ̄ 100]Al11Mn4//[223]Al9Mn4,and the orientation relationship between Al8Mn5and α-Mg was ( ̄ 252)Al8Mn5//(̄ 12̄ 13)α−Mg. The Al9Mn4and Al11Mn4phasesgrew in the same direction. The intensity of basal fiber texture of AZTM2110 alloy decreased by 21.7%. The ultimatetensile strength, yield strength, and elongation of the AZ21 alloy increased by 29.03%, 65.05%, and 61.02%, respectively. Grain-refinement strengthening was the main mechanism underlying the improvement in AZTM2110 alloy strength. Grainrefinement and the weakened basal fiber texture improved the plasticity of the AZTM2110 alloy.
Low beta superconducting cavity system design for HIAF iLinac
Mengxin Xu,Yuan He,Shengxue Zhang,Lubei Liu,Tiancai Jiang,Zehua Liang,Tong Liu,Yue Tao,Chunlong Li,Qitong Huang,Fengfeng Wang,Hao Guo,Feng Bai,Xianbo Xu,Shichun Huang,Xiaoli Li,Zhijun Wang,Shenghu Zha Korean Nuclear Society 2023 Nuclear Engineering and Technology Vol.55 No.7
A superconducting ion-Linac (iLinac), which is supposed to work as the injector in the High Intensity heavy-ion Accelerator Facility project, is under development at the Institute of Modern Physics (IMP), Chinese Academy of Sciences. The iLinac is a superconducting heavy ion linear accelerator approximately 100 meters long and contains 96 superconducting cavities in two types of 17 cyromodules. Two types of superconducting resonators (quarter-wave resonators with a frequency of 81.25 MHz and an optimal beta β = v/c = 0.07 called QWR007 and half-wave resonators with a frequency of 162.5 MHz and an optimal beta β = 0.15 called HWR015) have been investigated. The cavity design included extensive multi-parameter electromagnetic simulations and mechanical analysis, and its results are described in details. The fundamental power coupler and cavity dynamic tuner designs are also presented in this article. The prototypes are under manufacturing and expected to be ready in 2023.