Study on the Cyclic Behavior of an UPPC Beam with an Energy Dissipator and a Conventional UPPC Beam

Xiaoying Wen,Yanhe Li,Jianlei Zhai,Yue Liu 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.9

In this study, low reversed cyclic loading experiments were performed on an Unbonded Partially Prestressed Concrete (UPPC) beam with an energy dissipator and a conventional UPPC beam to investigate the seismic performance of the beams, including displacement restoration, energy dissipation capacity, ductility, and failure patterns. Studies have shown that UPPC beams with energy dissipators are superior to conventional UPPC beams in terms of displacement restoration, energy dissipation capacity, and ductility and are inferior to conventional UPPC beams in terms of failure patterns. The results of this investigation can help us to improve the poor energy dissipation capacity and lack of displacement restoration in UPPC beams. The contact relationship between the unbonded prestressed tendon and the concrete was simulated using the coupling interaction method, The hysteresis curve based on the calculations was close to the hysteresis curve obtained experimentally. The ultimate bearing capacity and ultimate displacement are highly similar.

Semantic Role Labeling Based Event Argument Identification

Wen Zhou,Yajun Zhang,Xiaoying Su,Yao Li,Zongtian Liu 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.6

Event extraction is one of the most challenging tasks of information extraction from text. This paper studies one of the stages of Chinese event extraction, namely, event argument identification. A new method we call Semantic Role Labeling Based Event Argument Identification, based on the state-of-the-art methods of event extraction and event argument identification, is proposed. First, the 5W1H (who, what, whom, when, where, how) information is extracted from the text using semantic role labeling; thereafter, the 5W1H information is mapped to each argument of the event by heuristic rules. The method is used to identify the event arguments on two test sets of acquisition and transfer data, and contrasted with the methods of SRL and SRL combining heuristic rules. We find the best F1 measures for each to be 76.04% and 79.19% respectively.

Cloning and expression of a wild eggplant cytochrome P450 gene, StoCYP77A2, involved in plant resistance to Verticillium dahliae

Liu Yang,Ce Shi,Xiaoying Mu,Chao Liu,Ke Shi,Wen-jiao Zhu,Qing Yang 한국식물생명공학회 2015 Plant biotechnology reports Vol.9 No.4

Plant P450s play an important role in plant response to environmental stimuli, especially to pathogen challenge, besides leading to the biosynthesis of secondary metabolites. In this work, a Verticillium dahliae-induced cDNA sequence was cloned from wild eggplant Solanum torvum and designated StoCYP77A2. StoCYP77A2 encodes a 511-amino acid peptide that shows sequence homology to the plant CYP77 family. StoCYP77A2 is expressed in a tissue-specific manner with the highest expression level in stem. The expression level of StoCYP77A2 was increased in wild eggplants which were infected with Verticillium dahlia. We expressed StoCYP77A2 in V. dahliae-sensitive tobacco, and the transgenic tobacco plants were more resistant to V. dahliae infection than the wild type. Protein extraction of transgenic tobacco showed strong antifungal activity against V. dahliae, indicating that StoCYP77A2 may be involved in the synthesis of some antimicrobial compounds. These results suggest that StoCYP77A2 plays a role in plant defense to V. dahliae infection.

Endothelin-1 enhances the melanogenesis via MITF-GPNMB pathway

Ping Zhang,Wei Liu,Xiaoying Yuan,Dong Guang Li,We Ijie Gu,Tian Wen Gao 생화학분자생물학회(구 한국생화학분자생물학회) 2013 BMB Reports Vol.46 No.7

Microvascular Myocardial Ischemia in Patients With Diabetes Without Obstructive Coronary Stenosis and Its Association With Angina

Yu Yarong,Yang Wenli,Dai Xu,Yu Lihua,Lan Ziting,Ding Xiaoying,Zhang Jiayin 대한영상의학회 2023 Korean Journal of Radiology Vol.24 No.11

Objective: To investigate the incidence of microvascular myocardial ischemia in diabetic patients without obstructive coronary artery disease (CAD) and its relationship with angina. Materials and Methods: Diabetic patients and an intermediate-to-high pretest probability of CAD were prospectively enrolled. Non-diabetic patients but with an intermediate-to-high pretest probability of CAD were retrospectively included as controls. The patients underwent dynamic computed tomography-myocardial perfusion imaging (CT-MPI) and coronary computed tomography angiography (CCTA) to quantify coronary stenosis, myocardial blood flow (MBF), and extracellular volume (ECV). The proportion of patients with microvascular myocardial ischemia, defined as any myocardial segment with a mean MBF ≤ of 100 mL/min/100 mL, in patients without obstructive CAD (Coronary Artery Disease–Reporting and Data System [CAD-RADS] grade 0–2 on CCTA) was determined. Various quantitative parameters of the patients with and without diabetes without obstructive CAD were compared. Multivariable analysis was used to determine the association between microvascular myocardial ischemia and angina symptoms in diabetic patients without obstructive CAD. Results: One hundred and fifty-two diabetic patients (mean age: 59.7 ± 10.7; 77 males) and 266 non-diabetic patients (62.0 ± 12.3; 167 males) were enrolled; CCTA revealed 113 and 155 patients without obstructive CAD, respectively. For patients without obstructive CAD, the mean global MBF was significantly lower for those with diabetes than for those without (152.8 mL/min/100 mL vs. 170.4 mL/min/100 mL, P < 0.001). The mean ECV was significantly higher for diabetic patients (27.2% vs. 25.8%, P = 0.009). Among the patients without obstructive CAD, the incidence of microvascular myocardial ischemia (36.3% [41/113] vs. 10.3% [16/155], P < 0.001) and interstitial fibrosis (69.9% [79/113] vs. 33.3% [8/24], P = 0.001) were significantly higher in diabetic patients than in the controls. The presence of microvascular myocardial ischemia was independently associated with angina symptoms (adjusted odds ratio = 3.439, P = 0.037) in diabetic patients but without obstructive CAD. Conclusion: Dynamic CT-MPI + CCTA revealed a high incidence of microvascular myocardial ischemia in diabetic patients without obstructive CAD. Microvascular myocardial ischemia is strongly associated with angina.

An exchange bias observed in Tb/Cr/FeCo trilayers with ultrathin Cr layer at low temperature

Sun Li,Li Xiaoyan,Zhang Yiwei,Song Hengbo,Zhang Wen,Kou Zhaoxia,Zhang Dong,Liu Xiaoying,Fei Hongyang,Pan Mengmei,Zhao Zhibin,Zhai Ya 한국물리학회 2022 Current Applied Physics Vol.44 No.-

Positive exchange bias field (He) is observed in Tb/Cr (tCr)/FeCo trilayers at 5 K without cooling field, and negative He for Tb/FeCo bilayer. The negative He of Tb/FeCo implies the FM coupling at the interface due to Co and Fe dominate in the magnetization of the ferrimagnetic interlayer alloy of FeCo and Tb. With the inserting of Cr layer, this situation is broken, and the positive He implies the antiferromagnetic interlayer coupling. A peak of He = 6.0 mT for trilayers with tCr = 1.5 nm is corresponding to the minimum value of coercivity as a function of tCr at 5 K, which is used to study the effect of the cooling field (Hfc) on He as a function of temperature. It is found that Hfc of 100 mT triggers He from positive to negative at T ≤ 15 K. The magnetoresistance results also confirm the coexistence of multiple MR mechanisms in these trilayers.

Seismic Performance Experiment Involving One-Story, Two-Bay Self-control Energy Dissipation UPPC Frames under Low Cyclic Loads

Cheng Qian,Yanhe Li,Dengfeng Xie,Ning Li,Xiaoying Wen 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.7

This paper presents an experimental study of the behavior of three one-story, two-bay unbonded partially prestressed concrete (UPPC) frames, of which two frames are self-control energy dissipation UPPC frames. This study aims to use the self-control energy dissipation UPPC frame as a new frame, and its seismic performance is evaluated compared to that of existing UPPC frames. The new frame utilizes energy dissipation components to provide energy dissipation capabilities, which allow the frame to form a beamhinge mechanism under earthquake actions. The influence of the prestress release percentage on the seismic performance of the UPPC frame is experimentally examined. The test results show that the new UPPC frame displays better ductility and energy dissipation capabilities as the prestress release percentage increases, but the lateral resistance is slightly weaker than that of a common UPPC frame. Overall, the new frame displays better seismic performance than the conventional UPPC frame and can be reused after retrofitting.