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Semicontinuity of the Minimal Solution Set Mappings for Parametric Set-Valued Vector Optimization Problems

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Journal of the Operations Research Society of China 2021年第2期9卷 441-454页

作者： Xin xu yang-dong xu Yue-Ming College of Science Chongqing University of Posts and TelecommunicationsChongqing 400065China

With the help of a level mapping,this paper mainly investigates the semicontinuity of minimal solution set mappings for set-valued vector optimization ***,we introduce a kind of level mapping which generalizes one given in Han and Gong(Optimization 65:1337–1347,2016).Then,we give a sufficient condition for the upper semicontinuity and the lower semicontinuity of the level ***,in terms of the semicontinuity of the level mapping,we establish the upper semicontinuity and the lower semicontinuity of the minimal solution set mapping to parametric setvalued vector optimization problems under the C-Hausdorff continuity instead of the continuity in the sense of Berge.

关键词： Set-valued vector optimization problems Level mapping Solution set mapping Upper semicontinuity Lower semicontinuity

B位掺杂提升CsSnI_(3)钙钛矿结构和电荷稳定性的第一性原理研究

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原子与分子物理学报 2025年第6期42卷 144-152页

作者：赵思健葛治中杨旭东上海交通大学材料科学与工程学院上海200240

全无机CsSnI_(3)钙钛矿拥有理想的带隙宽度(1.3 eV),光电转化效率理论峰值达到33%.目前CsSnI_(3)太阳能电池的发展受制于的CsSnI_(3)的结构不稳定性和Sn^(2+)易被氧化为Sn^(4+)的问题.研究基于第一性原理,详细探讨了一系列金属元素对CsS... 详细信息

全无机CsSnI_(3)钙钛矿拥有理想的带隙宽度(1.3 eV),光电转化效率理论峰值达到33%.目前CsSnI_(3)太阳能电池的发展受制于的CsSnI_(3)的结构不稳定性和Sn^(2+)易被氧化为Sn^(4+)的问题.研究基于第一性原理,详细探讨了一系列金属元素对CsSnI_(3)进行B位掺杂改性的方案,旨在提升CsSnI_(3)结构稳定性,并抑制CsSnI_(3)中Sn^(2+)被氧化为Sn^(4+)的问题.计算结果表明,在CsSnI_(3)钙钛矿B位掺杂三价金属Sb、Bi能够阻碍CsSnI_(3)相变生成Cs_(2)SnI_6,并且抑制Sn^(2+)的氧化;尤其在晶格中存在锡空位缺陷时,Sb、Bi掺杂对于Sn^(4+)形成的抑制效果更为显著.同时,低浓度的Sb、Bi掺杂不会改变CsSnI_(3)的直接带隙特性,且带隙宽度变化较小,因此能够在维持CsSnI_(3)优良光电活性的基础上进一步提高结构和电荷的稳定性.研究结果为实现高效且稳定的CsSnI_(3)钙钛矿太阳能电池提供了重要的理论指导.

关键词：全无机锡基钙钛矿第一性原理 B位掺杂相稳定性电子结构

A Maple Package on Symbolic Computation of Hirota Bilinear Form for Nonlinear Equations

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Communications in Theoretical Physics 2009年第11期52卷 801-807页

作者： yang xu-dong RUAN Hang-Yu Department of Physics Ningbo University Ningbo 315211 China

An improved algorithm for symbolic computation of Hirota bilinear forms of KdV-type equations withlogarithmic transformations is *** the algorithm,the general assumption of Hirota bilinear form is successfullyreduced based on the property of uniformity in ***,we discard the integral operation in the *** software package HBFTrans is written in Maple and its running effectiveness is tested by a variety solitonequations.

关键词： Hirota bilinear form nonlinear equation, symbolic algebra

On the Stability of the Solution Set Mappings to Parametric Set Optimization Problems

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Journal of the Operations Research Society of China 2016年第2期4卷 255-263页

作者： yang-dong xu Ping-Ping Zhang College of Science Chongqing University of Posts and TelecommunicationsChongqing 400065China

In this paper,under some suitable assumptions without any involving information on the solution set,we give some sufficient conditions for the upper semicontinuity,lower semicontinuity,and closedness of the solution s... 详细信息

关键词： Upper semicontinuity Lower semicontinuity Closedness Parametric set optimization problem Less order relation

A Maple Package on Symbolic Computation of Conserved Densities for （1＋l）-Dimensional Nonlinear Evolution Systems

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Communications in Theoretical Physics 2007年第6期47卷 961-968页

作者： yang xu-dong RUAN Hang-Yu LOU Sen-Yue Department of Physics Ningbo University Ningbo 315211 China Department of Physics Shanghai Jiao Tong University Shanghai 200030 China

A new algorithm for symbolic computation of polynomial-type conserved densities for nonlinear evolution systems is presented. The algorithm is implemented in Maple. The improved algorithm is more efficient not only in removing the redundant terms of the genera/form of the conserved densities but also in solving the conserved densities with the associated flux synchronously without using Euler operator. Furthermore, the program *** can be used to determine the preferences for a given parameterized nonlinear evolution systems. The code is tested on several well-known nonlinear evolution equations from the soliton theory.

关键词： conservation laws nonlinear evolution systems computer algebra

An Extension of Algorithm on Symbolic Computations of Conserved Densities for High-Dimensional Nonlinear Systems

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Communications in Theoretical Physics 2008年第7期50卷 23-30页

作者： yang xu-dong RUAN Hang-Yu LOU Sen-Yue Department of Physics Ningbo University Ningbo 315211 China Department of Physics Shanghai Jiao Tong University Shanghai 200030 China

An improved algorithm for symbolic computations of polynomial-type conservation laws (PCLaws) of ageneral polynomial nonlinear system is *** algorithm is implemented in Maple and can be successfully usedfor high-dimensional ***,the algorithm discards the restriction to evolution *** programcan also be used to determine the preferences for a given parameterized nonlinear *** code is tested on severalknown nonlinear equations from the soliton theory.

关键词： conservation laws nonlinear systems computer algebra

Simulations of Aerosol Optical Properties to Top of Atmospheric Reflected Sunlight in the Near Infrared CO_2 Weak Absorption Band

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Atmospheric and Oceanic Science Letters 2013年第1期6卷 60-64页

作者： yang dong-xu LIU Yi CAI Zhao-Nan Key Laboratory of the Middle Atmosphere and Global Environmental Observation(LAGEO) Institute of Atmospheric Physics(IAP)Chinese Academy of Sciences

Over the Asian continent,high aerosol loading is critical to ensure the high accuracy of CO_2 retrieval in the near infrared absorption *** were performed to explore the effect of light path modification by aerosol son the atmospheric CO_2 near infrared band(6140-6270 cm^(-1)).The Vector LInearized Discrete Ordinate Radiative Transfer(VLIDORT) model and the Line-By-Line Radiative Transfer Model(LBLRTM) were used for forward *** *** atmosphere was used for atmospheric *** results indicate that the aerosols caused similar effects to increases in CO_2 in the planetary boundary layer and became more significant with aerosol layer rising while aerosol optical depth was *** effect will cause an over estimation of the CO_2 mixing ratio in the retrieval process and an under estimation in the aerosol *** results also indicate that the effect of urban and industrial aerosols is smaller than that of non-absorbing and dust aerosols because of the nearly constant absorption properties in the near infrared band.

关键词： satellite remote sensing CO2 near infrared aerosol

Bioinformatics analysis of aberrantly methylated-differentially expressed genes and pathways in hepatocellular carcinoma

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World Journal of Gastroenterology 2018年第24期24卷 2605-2616页

作者： Liang Sang xue-Mei Wang dong-yang xu Wen-jing Zhao Department of Ultrasound The First Hospital of China Medical University

AIM To discover methylated-differentially expressed genes(MDEGs) in hepatocellular carcinoma(HCC) and to explore relevant hub genes and potential pathways. METHODS The data of expression profiling GSE25097 and methylation profiling GSE57956 were gained from GEO Datasets. We analyzed the differentially methylated genes and differentially expressed genes online using GEO2 R. Functional and enrichment analyses of MDEGs were conducted using the DAVID database. A protein-protein interaction(PPI) network was performed by STRING and then visualized in Cytoscape. Hub genes were ranked by cytoH ubba, and a module analysis of the PPI network was conducted by MCODE in Cytoscape software. RESULTS In total, we categorized 266 genes as hypermethylated, lowly expressed genes(Hyper-LGs) referring to endogenous and hormone stimulus, cell surface receptor linked signal transduction and behavior. In addition, 161 genes were labelled as hypomethylated, highly expressed genes(Hypo-HGs) referring to DNA replication and metabolic process, cell cycle and division. Pathway analysis illustrated that Hyper-LGs were enriched in cancer, Wnt, and chemokine signalling pathways, while Hypo-HGs were related to cell cycle and steroid hormone biosynthesis pathways. Based on PPI networks, PTGS2, PIK3 CD, CXCL1, ESR1, and MMP2 were identified as hub genes for Hyper-LGs, and CDC45, DTL, AURKB, CDKN3, MCM2, and MCM10 were hub genes for Hypo-HGs by combining six ranked methods of cytoH ubba. CONCLUSION In the study, we disclose numerous novel genetic and epigenetic regulations and offer a vital molecular groundwork to understand the pathogenesis of HCC. Hub genes, including PTGS2, PIK3 CD, CXCL1, ESR1, MMP2, CDC45, DTL, AURKB, CDKN3, MCM2, and MCM10, can be used as biomarkers based on aberrant methylation for the accurate diagnosis and treatment of HCC.

关键词： Hepatocellular carcinoma Methylation Gene expression Bioinformatics analysis

Morin enhances hepatic Nrf2 expression in a liver fibrosis rat model

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World Journal of Gastroenterology 2017年第47期23卷 8334-8344页

作者： Liang Sang xue-Mei Wang dong-yang xu Li-xuan Sang yang Han Long-yang Jiang Department of Ultrasound The First Hospital of China Medical UniversityShenyang Department of Geriatrics The First Hospital of China Medical UniversityShenyang Department of Pathology China Medical UniversityShenyang Pharmacy College China Medical UniversityShenyang

AIM To investigate whether morin can reduce hepatic fibrosis by activating the NF-E2-related factor 2(Nrf2) signaling *** Twenty male Sprague-Dawley rats were randomly divided into four groups: control group, morin group, carbon tetrachloride(CCl4) group, and morin + CCl4 group. Rats in both the CCl4 and morin + CCl4 groups were injected intraperitoneally with CCl4 at a dose of 2 mL/kg twice a week. Rats in both the morin and morin + CCl4 groups were treated orally with morin at a dose of 50 mg/kg twice a week. Control rats were treated with vehicle only twice a week. At the end-point of the 8 wk of the experimental period, serum AST, ALT, and ALP were measured, and the liver specimenswere obtained for pathological assessment. Real-time PCR and Western blot methods were used to analyze the expression of α-smooth muscle actin(α-SMA), collagen Ⅰ, collagen Ⅲ, Nrf2, heme oxygenase(HO-1), and quinone oxidoreductase 1(NQO1) using frozen liver *** Morin-treated rats in the morin + CCl4 group had less hyperplasia of fiber tissue, minimal inflammatory cells, and less body weight loss with favorable liver enzyme measurements compared to rats treated with CCl4 only. Additionally, morin-treated rats had significantly lower m RNA and protein expression of α-SMA, collagen Ⅰ, and collagen Ⅲ, but significantly higher m RNA and protein expression of Nrf2, HO-1, and NQO1 compared to rats treated with CCl4 only(P < 0.05).CONCLUSION Morin could play a protective role by inducing the expression of Nrf2 and its downstream antioxidant factors(HO-1 and NQO1) and reducing the expression of α-SMA, collagen Ⅰ, and collagen Ⅲ in CCl4-induced liver fibrosis rats.

关键词： Liver fibrosis Rat Morin Nrf2