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Prognostic model for esophagogastric variceal rebleeding after endoscopic treatment in liver cirrhosis: A Chinese multicenter study

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World Journal of Gastroenterology 2025年第2期31卷 85-101页

作者： Jun-Yi Zhan Jie Chen Jin-Zhong Yu Fei-Peng Xu Fei-Fei Xing De-Xin Wang Ming-yan yang Feng Xing Jian Wang Yong-Ping Mu Cell Biology Laboratory Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China Institute of Liver Diseases Shanghai Academy of Chinese MedicineShanghai 201203China Clinical Key Laboratory of Traditional Chinese Medicine of Shanghai Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China Key Laboratory of Liver and Kidney Disease of the Ministry of Education Shanghai University of Traditional Chinese MedicineShanghai 201203China Department of Gastroenterology and Hepatology Zhongshan Hospital Affiliated to Fudan UniversityShanghai 200032China Shanghai Institute of Liver Disease Fudan UniversityShanghai 200032China Evidence-Based Medicine Center Fudan UniversityShanghai 200032China Department of Gastrointestinal Endoscopy Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China Department of Hepatology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China

BACKGROUND Rebleeding after recovery from esophagogastric variceal bleeding(EGVB)is a severe complication that is associated with high rates of both incidence and *** its clinical importance,recognized prognostic models that can effectively predict esophagogastric variceal rebleeding in patients with liver cirrhosis are *** To construct and externally validate a reliable prognostic model for predicting the occurrence of esophagogastric variceal *** This study included 477 EGVB patients across 2 cohorts:The derivation cohort(n=322)and the validation cohort(n=155).The primary outcome was rebleeding events within 1 *** least absolute shrinkage and selection operator was applied for predictor selection,and multivariate Cox regression analysis was used to construct the prognostic *** validation was performed with bootstrap *** assessed the discrimination,calibration and accuracy of the model,and performed patient risk *** Six predictors,including albumin and aspartate aminotransferase concentrations,white blood cell count,and the presence of ascites,portal vein thrombosis,and bleeding signs,were selected for the rebleeding event prediction following endoscopic treatment(REPET)*** predicting rebleeding within 1 year,the REPET model ex-hibited a concordance index of 0.775 and a Brier score of 0.143 in the derivation cohort,alongside 0.862 and 0.127 in the validation ***,the REPET model revealed a significant difference in rebleeding rates(P<0.01)between low-risk patients and intermediate-to high-risk patients in both *** We constructed and validated a new prognostic model for variceal rebleeding with excellent predictive per-formance,which will improve the clinical management of rebleeding in EGVB patients.

关键词： Esophagogastric variceal bleeding Variceal rebleeding Liver cirrhosis Prognostic model Risk stratification Secondary prophylaxis

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Incomplete Multi-View Clustering via Auto-Weighted Fusion in Partition Space

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Tsinghua Science and Technology 2023年第3期28卷 595-611页

作者： Dongxue Xia yan yang Shuhong yang School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China School of Computer Guangxi University of Science and TechnologyLiuzhou 545006China

As a class of effective methods for incomplete multi-view clustering,graph-based algorithms have recently drawn wide ***,most of them could use further improvement regarding the following ***,in some graph-based models,all views are forced to share a common similarity graph regardless of the severe consistency degeneration due to incomplete ***,similarity graph construction and cluster analysis are sometimes performed ***,the contribution difference of individual views is not always carefully *** address these issues simultaneously,this paper proposes an incomplete multi-view clustering algorithm based on auto-weighted fusion in partition *** our algorithm,the information of cluster structure is introduced into the process of similarity learning to construct a desirable similarity graph,information fusion is performed in partition space to alleviate the negative impact brought about by consistency degradation,and all views are adaptively weighted to reflect their different contributions to clustering ***,all the subtasks are collaboratively optimized in a united framework to reach an overall optimal *** results show that the proposed method compares favorably with the state-of-the-art methods.

关键词： Incomplete Multi-view Clustering(IMC) partition space auto-weighted fusion collaborative optimization

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Notes on Proper Class of Triangles

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Acta Mathematica Sinica,English Series 2013年第11期29卷 2137-2154页

作者： Xiao yan yang Department of Mathematics Northwest Normal University

Let T be a triangulated category and ζ a proper class of triangles. Some basics properties and diagram lemmas are proved directly from the definition of ζ.

关键词： Proper class of triangles triangulated category

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Gradient Estimates for the Equation Δu+cu^(-α)=0 on Riemannian Manifolds

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Acta Mathematica Sinica,English Series 2010年第6期26卷 1177-1182页

作者： Yun yan yang Department of Mathematics Information School Renmin University of China Beijing 100872 P. R. China

Let （M, g） be a complete non-compact Riemannian manifold without boundary. In this paper, we give the gradient estimates on positive solutions to the following elliptic equation with singular nonlinearity：△u（x）＋cu^-a=0 in M,where a 〉 0, c are two real constants. When c 〈 0 and M is a bounded smooth domain in R^n, the above equation is known as the thin film equation, which describes a steady state of the thin film （see Guo-Wei [Manuscripta Math., 120, 193-209 （2006）]）. The results in this paper can be viewed as an supplement of that of J. Li [J. Funct. Anal., 100, 233-256 （1991）], where the nonlinearity is the positive power of u.

关键词： positive solution gradient estimate thin film equation

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The Change of Orientation Relationships Between Austenite and α'-Martensite During Deformation in High Manganese TRIP Steel

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Acta Metallurgica Sinica(English Letters) 2015年第3期28卷 289-294页

作者： Hai-yan yang Jing Li Ping yang School of Materials Science and Engineering University of Science and Technology Beijing

In situ observation of electron backscattering diffraction technique was used to evaluate the orientation relationships between austenite and α′-martensite（α′-M） for high manganese transformation-induced plasticity *** was noted that different from the thermal martensite,which well obeyed K-S relationship with austenite,the orientation relationship between deformation-induced α′-M with austenite changed during deformation,namely K-S and N-W relations *** clear differences existed between α′-M variants with two kinds of relationships in terms of martensitic orientation,shape and the misorientation between α′-M *** this phenomenon happened in almost all austenitic grains with different orientations investigated in this *** atom displacement mechanism through conjugate complex slips of partial dislocations in the distorted fcc lattice was applied in this article to interpret the coexistence of K-S and N-W relationships.

关键词： In situ observation Orientation relationship Electron backscattered diffraction technique(EBSD) Martensitic transformation High manganese TRIP steel

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Optimization of ECAP-RAP process for preparing semisolid billet of 6061 aluminum alloy

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International Journal of Minerals,Metallurgy and Materials 2020年第6期27卷 792-800页

作者： Zu-jian yang Kai-kun Wang yan yang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization Jinchang 737100China

6061 aluminum alloy semisolid billet was prepared by the equal-channel angular processing(ECAP)-recrystallization and partial(RAP)process(a combination of equal-channel angular processing and recrystallization and partial remelting).The effects of different process parameters on the alloy microstructure were studied and the quantitative relationship between the process parameters and microstructure was established by response surface methodology(RSM)to optimize the process *** to the orthogonal test,the holding temperature and holding time of the four ECAP-RAP process parameters were found to have the greatest impact on the microstructural characteristics,including average grain size and average shape *** RSM,it was also found that when the average grain size or the average shape factor is optimized separately,another will be *** the two indexes were simultaneously considered,the optimal process parameters were found to be a holding temperature of 623°C and holding time of 13 min,and the corresponding average grain size and average shape factor were 35.97μm and 0.8535,***,comparing the experimental and predicted values,the reliability of the established response surface model was verified.

关键词： 6061 aluminum alloy equal-channel angular pressing semisolid microstructure response surface methodology

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Fusing Syntactic Structure Information and Lexical Semantic Information for End-to-End Aspect-Based Sentiment Analysis

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Tsinghua Science and Technology 2023年第2期28卷 230-243页

作者： Yong Bie yan yang Yiling Zhang School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China

The aspect-based sentiment analysis(ABSA)consists of two subtasksaspect term extraction and aspect sentiment *** methods conduct the ABSA task by handling the subtasks in a pipeline manner,whereby problems in performance and real application *** this study,we propose an end-to-end ABSA model,namely,SSi-LSi,which fuses the syntactic structure information and the lexical semantic information,to address the limitation that existing end-to-end methods do not fully exploit the text *** two network branches,the model extracts syntactic structure information and lexical semantic information,which integrates the part of speech,sememes,and context,***,on the basis of an attention mechanism,the model further realizes the fusion of the syntactic structure information and the lexical semantic information to obtain higher quality ABSA results,in which way the text information is fully *** experiments demonstrate that the SSi-LSi model has certain advantages in using different text information.

关键词： deep learning natural language processing aspect-based sentiment analysis graph convolutional

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Shear wave velocity structure of the crust and upper mantle in Southeastern Tibet and its geodynamic implications

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Science China Earth Sciences 2020年第9期63卷 1278-1293页

作者： Zhiqi ZHANG Huajian YAO yan yang Laboratory of Seismology and Physics of Earth’s Interior School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Mengcheng National Geophysical Observatory University of Science and Technology of ChinaMengcheng 233500China CAS Center for Excellence in Comparative Planetology USTC Hefei 230026China

Southeastern Tibet,which has complex topography and strong tectonic activity,is an important area for studying the subsurface deformation of the Tibetan *** the two-station method on 10-year teleseismic Rayleigh wave data from 132 permanent stations in the southeastern Tibetan Plateau,which incorporates ambient noise data,we obtain the interstation phase velocity dispersion data in the period range of 5–***,we invert for the shear wave velocity of the crust and upper mantle through the direct 3-D inversion *** find two low-velocity belts in the mid-lower *** belt is mainly in the SongPan-GangZi block and northwestern part of the Chuan-Dian diamond block,whereas the other belt is mainly in the Xiaojiang fault zone and its eastern part,the Yunnan-Guizhou *** low-velocity belt in the Xiaojiang fault zone is likely caused by plastic deformation or partial melting of felsic rocks due to crustal ***,the significant positive radial anisotropy(VSH>VSV)around the Xiaojiang fault zone further enhances the amplitude of low velocity anomaly in our *** crustal low-velocity zone also extends southward across the Red River fault and farther to northern Vietnam,which may be closely related to heat sources in the upper *** two low-velocity belts are separated by a high-velocity zone near the Anninghe-Zemuhe fault system,which is exactly in the inner and intermediate zones of the Emeishan large igneous province(ELIP).We find an obvious high-velocity body situated in the crust of the inner zone of the ELIP,which may represent maficultramafic material that remained in the crust when the ELIP *** the upper mantle,there is a large-scale low-velocity anomaly in the Indochina and South China blocks south of the Red River *** low-velocity anomaly gradually extends northward along the Xiaojiang fault zone into the yangtze Craton as depth *** our velocity model,we think that southeastern Tibet is

关键词： Southeastern Tibet Surface wave tomography Shear wave velocity structure Xiaojiang fault system Emeishan large igneous province Asthenospheric upwelling

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High Order Mixed Finite Elements with Mass Lumping for Elasticity on Triangular Grids

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Numerical Mathematics(Theory,Methods and Applications) 2022年第1期15卷 227-250页

作者： yan yang Xiaoping Xie School of Sciences Southwest Petroleum UniversityChengdu 610500China School of Mathematics Sichuan UniversityChengdu 610064China

A family of conforming mixed finite elements with mass lumping on triangular grids are presented for linear *** stress field is approximated by symmetric H(div)−Pk(k≥3)polynomial tensors enriched with higher order bubbles so as to allow mass lumping,and the displacement field is approximated by C−1−Pk−1 polynomial vectors enriched with higher order *** both the proposed mixed elements and their mass lumping schemes,optimal error estimates are derived for the stress and displacement in H(div)norm and L 2 norm,*** results confirm the theoretical analysis.

关键词： Linear elasticity mixed finite element mass lumping error estimate

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Evolutionary dynamics of tax-based strong altruistic reward andpunishment in a public goods game

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Chinese Physics B 2024年第9期33卷 247-257页

作者： Zhi-Hao yang yan-Long yang Mathematics and Statistics School Guizhou UniversityGuiyang 550025China

In public goods games, punishments and rewards have been shown to be effective mechanisms for maintaining individualcooperation. However, punishments and rewards are costly to incentivize cooperation. Therefore, the generation ofcostly penalties and rewards has been a complex problem in promoting the development of cooperation. In real society,specialized institutions exist to punish evil people or reward good people by collecting taxes. We propose a strong altruisticpunishment or reward strategy in the public goods game through this phenomenon. Through theoretical analysis and numericalcalculation, we can get that tax-based strong altruistic punishment (reward) has more evolutionary advantages thantraditional strong altruistic punishment (reward) in maintaining cooperation and tax-based strong altruistic reward leads toa higher level of cooperation than tax-based strong altruistic punishment.

关键词： evolutionary game theory strong altruism punishment reward

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