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Wang, Nan-Ya,Wang, Cong,Li, Wei,Wang, Guan-Jun,Cui, Guo-Zhen,He, Hua,Zhao, Heng-Jun Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.4
Purpose: Alpha-fetoprotein (AFP), Lens culinaris agglutinin-reactive fraction of AFP (AFP-L3), and Golgi protein 73 (GP73) levels have been widely used as tumor markers for the diagnosis of hepatocellular carcinoma (HCC). The aim of this study was to investigate whether these tumor markers could be used to monitor short-term treatment response and recurrence of HCC in patients undergoing radiofrequency ablation (RFA). Methods: Between July 2012 and July 2013, 53 consecutive patients with newly diagnosed HCC were prospectively enrolled in this study. Among these, 32 patients underwent RFA, after which they were followed up prospectively at the First Hospital of Jilin University in China. Results: AFP, AFP-L3, and GP-73 values pre-RFA were not associated with tumor size, whereas AFP and GP-73 levels tended to be associated with tumor number, the presence of vascular invasion, deterioration of liver function, advanced-stage disease, and a poor performance status. GP-73 levels were dramatically elevated in the patients with hepatitis C-associated HCC. Neither pre-RFA nor 1-month post-RFA tumor marker values were associated with short-term outcome. The short-term recurrence rate of AFP-positive patients measured 1 month post-RFA was obviously higher than that of AFP-negative patients. Conclusions: AFP and GP-73 values were associated with clinical variables representing tumor growth and invasiveness, and the AFP value measured 1 month post-RFA was a strong predictor of short-term recurrence in patients with HCC.
Zhen Wang,Jichang Guo,Zhiqiong Chen,Zhiqiong Chen,Lisu Yu,Yuhao Wang,Hong Rao 한국통신학회 2022 Journal of communications and networks Vol.24 No.2
This paper considers a novel scenario, where a physicallayer security issue is studied in unmanned aerial vehicles(UAVs)-assisted cognitive relay system. A secondary unmannedaerial vehicle (SUAV) relay delivers information from multiplesecondary Internet of things (IoT) devices to a secondary user(SU) under the spectrum sharing with primary users (PUs). Inthe processing of the information transmission of the SUAV relay,a secondary eavesdropper (SE) wiretaps the information transmittedby the UAV relay with imperfect location information. Inorder to confuse the SE, a friendly SUAV jammer is employedto transmit jamming signals to the SE. To prevent the SEwiretapping information as much as possible, we aim to maximizeaverage worst-case secrecy rate of the secondary relay networkby jointly optimizing robust trajectories and power of the SUAVrelay and jammer under the power, trajectories, informationcausality and multiple interference temperature (IT) thresholdconstraints. Thus, we formulate the original problem whichis a challenging non-convex problem. We propose an effectivealgorithm to solve the original problem and attain locally optimalsolution based on the successive convex approximation (SCA)technology and the alternate optimization method. Simulationsare offered to demonstrate that our proposed resource allocationscheme can effectively improve the security performance ofthe SUAV relay network in comparison with other benchmarkschemes.
Partial Pole Assignment via Constant Gain Feedback in Two Classes of Frequency-domain Models
Guo-Sheng Wang,Guo-Zhen Yang,Guang-Ren Duan 대한전기학회 2007 International Journal of Control, Automation, and Vol.5 No.2
The design problem of partial pole assignment (PPA) in two classes of frequency-domain MIMO models by constant gain feedback is investigated in this paper. Its aim is to design a constant gain feedback which changes only a subset of the open-loop eigenvalues, while the rest of them are kept unchanged in the closed-loop system. A near general parametric expression for the feedback gain matrix in term of a set of design parameter vectors and the set of the closed-loop poles, and a simple parametric approach for solving the proposed problem are presented. The set of poles do not need to be previously prescribed, and can be set undetermined and treated together with the set of parametric vectors as degrees of design freedom provided by the approach. An illustrative example shows that the proposed parametric method is simple and effective.
Zhou, Guo-Wei,Guo, Guo-Cong,Liu, Bin,Wang, Ming-Sheng,Cai, Li-Zhen,Huang, Jin-Shun Korean Chemical Society 2004 Bulletin of the Korean Chemical Society Vol.25 No.5
Complexes M($C_7H_2NO_5)3H_2O{\cdot}H_2O{\cdot}0.25MeCN$ (M=Ni, Co) were crystallized from the reactions of $Ni(CH_3COO)_2{\cdot}4H_2O\;or\;Co(CH_3COO)_2{\cdot}2H_2O$ with KSCN and 2,6-dicarboxy-4-hydroxypyridine (chelidamic acid). The structures were characterized by X-ray crystallography. The crystal structures of 1 and 2 show a distorted octahedral coordination geometry around the M(II) ions, which are chelated by one nitrogen atom and two oxygen atoms of the chelidamic acid and three water molecules. Complexes 1 and 2 display the hydrogen-bonded 3D framework. The magnetic behavior of 2 exhibits antiferromagnetic interaction.
A rapid modeling method and accuracy criteria for common-cause failures in Risk Monitor PSA model
Zhang, Bing,Chen, Shanqi,Lin, Zhixian,Wang, Shaoxuan,Wang, Zhen,Ge, Daochuan,Guo, Dingqing,Lin, Jian,Wang, Fang,Wang, Jin Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.1
In the development of a Risk Monitor probabilistic safety assessment (PSA) model from the basic PSA model of a nuclear power plant, the modeling of common-cause failure (CCF) is very important. At present, some approximate modeling methods are widely used, but there lacks criterion of modeling accuracy and error analysis. In this paper, aiming at ensuring the accuracy of risk assessment and minimizing the Risk Monitor PSA models size, we present three basic issues of CCF model resulted from the changes of a nuclear power plant configuration, put forward corresponding modeling methods, and derive accuracy criteria of CCF modeling based on minimum cut sets and risk indicators according to the requirements of risk monitoring. Finally, a nuclear power plant Risk Monitor PSA model is taken as an example to demonstrate the effectiveness of the proposed modeling method and accuracy criteria, and the application scope of the idea of this paper is also discussed.
The New Strategy of Object-Based Directional Query
Run-tao liu,Yan-ming Wang,Zhen-guo Zhao,Guang -Yue Tian 보안공학연구지원센터 2014 International Journal of Database Theory and Appli Vol.7 No.6
To increase directional query efficiency, based on the study of existing algorithms of directional query, new pruning rules for directional query were given, combined with the new index structure MB-tree. The rules exclude the MBRs outside the query area and output all leaf nodes in the MBRs inside the query area. Based on the orders defined in MB-tree, a new algorithm of directional query is given combining with MB-tree by using recursive method, and the new algorithm can reduce I/O cost effectively. Experiment showed that the new directional query algorithm reduces the number of visited nodes, decreases I/O cost, and improves the efficiency of directional query.
Wang Le,Zhao Qing,Sun Wen Yang,Wang Lei,Liu Xiao Wei,Li Zhen Guo 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.81 No.4
Based on the two-dimensional geometric model, the infuence of equilibrium magnetic shear on the double tearing modes for diferent rational surface spacing is numerically simulated. We fnd that when the spacing is small, the saturation time of unstable mode decreases with the increase of the equilibrium magnetic shear. With the spacing increases, the saturation time will gradually change from decreasing with the increase of the equilibrium magnetic shear to increasing with the increase of the equilibrium magnetic shear. When the spacing is large, the saturation time increases with the equilibrium magnetic shear.
Microwave absorption and photocatalytic activity of MgxZn1−x ferrite/diatomite composites
Guo Wanmi,Wang Sulei,Ren Qifang,Jin Zhen,Ding Yi,Xiong Chun-Yu,Li Jinpeng,Chen Jing,Zhu Yuelei,오원춘 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.2
Mg x Zn 1−x ferrite/diatomite composites were synthesized by a two-step combination process (hydrothermal method and mechanical mixing method). The products were characterized by X-ray diff raction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR), UV–visible absorption spectrum (UV–Vis), X-ray photoelectron spectroscope (XPS), and microwave vector network analyzer. The photocatalytic results showed that the degradation rate of Rhodamine B (RhB) was 50–90% after 90 min of visible light. At 2–18 GHz frequency, when the Mg–Zn ratio increases to 0.8, the refl ection loss of a single MgxZn 1−x ferrite reaches − 7.23 dB at 8.75 GHz frequency in 3.5 mm thickness while the ratio is 0.2, the refl ection loss at 10.23 GHz reaches − 4.07 dB. The photocatalytic performance of Mgx Zn 1−x ferrite /diatomite composite for the degradation of RhB and its microwave absorption performance as absorbent are studied. The importance of developing new functional coatings to improve human environment is discussed.
Wang, Mian,Chen, Mingna,Yang, Zhen,Chen, Na,Chi, Xiaoyuan,Pan, Lijuan,Wang, Tong,Yu, Shanlin,Guo, Xingqi The Korean Society of Mycology 2017 Mycobiology Vol.45 No.4
Peanut yield and quality are seriously affected by pod rot pathogens worldwide, especially in China in recent years. The goals of this study are to analyze the structure of fungal communities of peanut pod rot in soil in three peanut cultivars and the correlation of pod rot with environmental variables using 454 pyrosequencing. A total of 46,723 internal transcribed spacer high-quality sequences were obtained and grouped into 1,706 operational taxonomic units at the 97% similarity cut-off level. The coverage, rank abundance, and the Chao 1 and Shannon diversity indices of the operational taxonomic units were analyzed. Members of the phylum Ascomycota were dominant, such as Fusarium, Chaetomium, Alternaria, and Sordariomycetes, followed by Basidiomycota. The results of the heatmap and redundancy analysis revealed significant variation in the composition of the fungal community among the three cultivar samples. The environmental conditions in different peanut cultivars may also influence on the structure of the fungal community. The results of this study suggest that the causal agent of peanut pod rot may be more complex, and cultivars and environmental conditions are both important contributors to the community structure of peanut pod rot fungi.