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Improved Selective Randomized Load Balancing in Mesh Networks
Xiaoning Zhang,Lemin Li,Sheng Wang,Fei Yang 한국전자통신연구원 2007 ETRI Journal Vol.29 No.2
We propose an improved selective randomized load balancing (ISRLB) robust scheme under the hose uncertainty model for a special double-hop routing network architecture. The ISRLB architecture maintains the resilience properties of Valiant’s load balancing and reduces the network cost/propagation delay in all other robust routing schemes.
Xiaoning Wu,Xiaoqian Xu,Jialing Zhou,Yameng Sun,Huiguo Ding,Wen Xie,Guofeng Chen,Anlin Ma,Hongxin Piao,Bingqiong Wang,Shuyan Chen,Tongtong Meng,Xiaojuan Ou,Hwai-I Yang,Jidong Jia,Yuanyuan Kong,Hong Yo 대한간학회 2023 Clinical and Molecular Hepatology(대한간학회지) Vol.29 No.3
Background/Aims: Existing hepatocellular carcinoma (HCC) prediction models are derived mainly from pretreatment or early on-treatment parameters. We reassessed the dynamic changes in the performance of 17 HCC models in patients with chronic hepatitis B (CHB) during long-term antiviral therapy (AVT). Methods: Among 987 CHB patients administered long-term entecavir therapy, 660 patients had 8 years of follow-up data. Model scores were calculated using on-treatment values at 2.5, 3, 3.5, 4, 4.5, and 5 years of AVT to predict threeyear HCC occurrence. Model performance was assessed with the area under the receiver operating curve (AUROC). The original model cutoffs to distinguish different levels of HCC risk were evaluated by the log-rank test. Results: The AUROCs of the 17 HCC models varied from 0.51 to 0.78 when using on-treatment scores from years 2.5 to 5. Models with a cirrhosis variable showed numerically higher AUROCs (pooled at 0.65–0.73 for treated, untreated, or mixed treatment models) than models without (treated or mixed models: 0.61–0.68; untreated models: 0.51–0.59). Stratification into low, intermediate, and high-risk levels using the original cutoff values could no longer reflect the true HCC incidence using scores after 3.5 years of AVT for models without cirrhosis and after 4 years of AVT for models with cirrhosis. Conclusions: The performance of existing HCC prediction models, especially models without the cirrhosis variable, decreased in CHB patients on long-term AVT. The optimization of existing models or the development of novel models for better HCC prediction during long-term AVT is warranted.
Research and Stability Analysis of Active-Disturbance-Rejection-Control-Based Microgrid Controllers
Xiaoning Xu,Xuesong Zhou,Youjie Ma,Yiqi Liu 전력전자학회 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.6
With the rapid development of microgrid technology, microgrid projects are no longer limited to laboratory demonstrations and pilot platforms. It shows greater value in practical applications. Hence, the smooth interaction between a microgrid and the main grid plays a critical role. In this paper, a control method based on active disturbance rejection control (ADRC) is proposed in order to realize seamless transitions between grid-connected and islanding operation modes and stable operation with variable loads. It is verified by simulations that the proposed ADRC-based method features better performance when compared to conventional proportional-integral-differential (PID) control. Meanwhile, the stability of the third-order extended state observer (ESO) in second-order ADRC is validated by using Lyapunov stability criteria.
( Xiaoning Li ),( Si-xiang Ling ),( Chun-wei Sun ),( Bao-long Zhu ),( Ming-uuan Sun ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
This work addresses the freeze-thaw cycles of subgrade in seasonal permafrost region western Sichuan plateau. The mechanism of freeze-thaw cycle effect of seasonal frozen subgrade under freeze-thaw cycle is explained. The analysis results show that the variation tendency of the simulated results are in good agreement with that of the field measured results. The freezing depth of the slope foot is smaller than that of the natural ground and is larger than that of the roadbed, which is affected by the freeze-thaw cycle effect, the freezing depth of the roadbed is more easily and the freezing depth is further increased. During the freezing period, a freezing front quickly forms at the natural ground surface with the water below migrates to it. The variation of the saturation at the maximum freezing depth is affected not only by the ambient temperature of the surface boundary during the melting period, but also by the continuous downward flow of cold energy, which makes the ambient temperature down to the freezing temperature, resulting in a short period of freezing, and in consequence, the saturation decreases briefly. Under the same circumstances, the closer the freezing front is to the underground water level, the smaller the frost heave and thawing settlement rate are. The water-thermal coupling effect has a further affect on the frost heaving rate.
Protective Effects of Ramie (Boehmeria nivea) against Oxidative Stress in C6 Glial Cells
Xiaoning Wang,조성훈,김호방,정영수,조은주,이상현 한국자원식물학회 2015 한국자원식물학회지 Vol.28 No.6
β amyloid protein (Aβ) plays a critical role in the pathogenesis of Alzheimer's disease (AD) and possibly in Aβ -induced mitochondrial dysfunction and oxidative stress. Aβ can directly cause reactive oxygen species (ROS) production. Overproduction of ROS is considered to be involved in the pathogenesis of neurodegeneration of AD. Here, we investigated 9 kinds of ramie (Boehmeria nivea, (L.) Gaud., BN; hereafter denoted as BN) for their protective action against oxidative stress in a cellular system using C6 glial cells. We observed loss of cell viability and high levels of ROS generation after treatment with hydrogen peroxide (H2O2) and Aβ25-35. However, treatments with BN extracts led to an increase in cell viability and decrease in ROS production induced by H2O2 and Aβ25-35. In particular, the extracts of BN-01 (seobang variety from Seocheon) and BN-09 (local variety from Yeonggwang) showed excellent anti-oxidative properties. This indicates that BN extracts could prevent neurodegeneration by reducing oxidative stress in cells.