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The morphology, kinematics and metallicity of blue-core galaxies

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Research in Astronomy and Astrophysics 2019年第6期19卷 51-62页

作者： Yong-Yun Chen yan-Mei Chen Qiu-Sheng gu Yong Shi Long-Ji Bing Xiao-ling Yu School of Astronomy and Space Science Nanjing University Nanjing 210093 China Collaborative Innovation Center of Modern Astronomy and Space Exploration Nanjing 210093 China

We select 107 blue-core galaxies from the MaNGA survey, studying their morphology, kinematics as well as the gas-phase metallicity. Our results are as follows:(i) In our sample, 26% of blue-core galaxies have decoupled gas-star kinematics, indicating external gas accretion;15% have bar-like structure and 8% show post-merger features, such as tidal tails and irregular gas/star velocity field. All these processes/features, such as accreting external misaligned gas, interaction and bar, can trigger gas inflow. Thus the central star-forming activities lead to bluer colors in their centers(blue-core galaxies).(ii) By comparing with the SDSS DR7 star-forming galaxy sample, we find that the blue-core galaxies have higher central gas-phase metallicity than what is predicted by the local mass-metallicity relation. We explore the origin of the higher metallicity, finding that not only the blue-core galaxies, but also the flat-gradient and red-core galaxies all have higher metallicity. This can be explained by the combined effect of redshift and galaxy color.

关键词： galaxies abundances-galaxies formation-galaxies structure

AN INDEFINITE-PROXIMAL-BASED STRICTLY CONTRACTIVE PEACEMAN-RACHFORD SPLITTING METHOD

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Journal of Computational Mathematics 2023年第6期41卷 1017-1040页

作者： yan gu Bo Jiang Deren Han Department of Mathematics Nanjing University of Aeronautics and AstronauticsNanjing210016China Key Laboratory of Mathematical Modelling and High Performance Computing of Air Vehicles(NUAA) MIITNanjing210016China School of Mathematical Sciences Key Laboratory for NSLSCS of Jiangsu ProvinceNanjing Normal UniversityNanjing210023China LMIB School of Mathematics and Systems ScienceBeihang UniversityBeijing100191China Key Laboratory for NSLSCS of Jiangsu Province China

The Peaceman-Rachford splitting method is efficient for minimizing a convex optimization problem with a separable objective function and linear ***,its convergence was not guaranteed without extra *** et al.(SIAM ***.24:1011-1040,2014)proved the convergence of a strictly contractive Peaceman-Rachford splitting method by employing a suitable underdetermined relaxation *** this paper,we further extend the so-called strictly contractive Peaceman-Rachford splitting method by using two different relaxation ***,motivated by the recent advances on the ADMM type method with indefinite proximal terms,we employ the indefinite proximal term in the strictly contractive Peaceman-Rachford splitting *** show that the proposed indefinite-proximal strictly contractive Peaceman-Rachford splitting method is convergent and also prove the o(1/t)convergence rate in the nonergodic *** numerical tests on the l 1 regularized least square problem demonstrate the efficiency of the proposed method.

关键词： Indefinite proximal Strictly contractive Peaceman-Rachford splitting method Convex minimization Convergence rate

Diverse Roles of Immune Cells in Transplant Rejection and Immune Tolerance

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Engineering 2022年第3期8卷 44-56页

作者： Xiaojie Gan Jian gu Zheng Ju ling Lu Hepatobiliary Center The First Affiliated Hospital of Nanjing Medical University&Research Unit of Liver Transplantation and Transplant ImmunologyChinese Academy of Medical SciencesNanjing 210029China

Organ transplant rejection(OTR)is a complex immune reaction involving multiple cells,and it determines graft survival and patient *** present,most transplant recipients are administered a combination of immunosuppressive and biological agents to protect them from ***,immunosuppressive agents negatively impact the immune system of the patients,causing them to suffer from serious complications,such as chronic infection and malignant ***,a thorough understanding of the mechanisms involved in immune tolerance and immune rejection with regard to organ transplant(OT)is essential for developing better treatment options and improving patient *** article reviews the role of immune cells in OTR and organ transplant tolerance(OTT),including the novel cell therapies that are currently under clinical trials for transplant recipients.

关键词： Immune cells Innate immune cells Adaptive immune cells Organ transplant Immune tolerance

Exploration of Gas-Dependent Self-Adaptive Reconstruction Behavior of Cu₂O for Electrochemical CO₂ Conversion to Multi-Carbon Products

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NANO-MICRO LETTERS 2025年第1期17卷 1-17页

作者： Zhang, Chaoran gu, Yichuan Jiang, Qu Sheng, Ziyang Feng, Ruohan Wang, Sihong Zhang, Haoyue Xu, Qianqing Yuan, Zijian Song, Fang Shanghai Jiao Tong Univ Sch Mat Sci & Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China

Structural reconstruction of electrocatalysts plays a pivotal role in catalytic performances for CO2 reduction reaction (CO2RR), whereas the behavior is by far superficially understood. Here, we report that CO2 accessibility results in a universal self-adaptive structural reconstruction from Cu2O to Cu@CuxO composites, ending with feeding gas-dependent microstructures and catalytic performances. The CO2-rich atmosphere favors reconstruction for CO2RR, whereas the CO2-deficient one prefers that for hydrogen evolution reaction. With the assistance of spectroscopic analysis and theoretical calculations, we uncover a CO2-induced passivation behavior by identifying a reduction-resistant but catalytic active Cu(I)-rich amorphous layer stabilized by *CO intermediates. Additionally, we find extra CO production is indispensable for the robust production of C2H4. An inverse correlation between durability and FECO/FEC2H4 is disclosed, suggesting that the self-stabilization process involving the absorption of *CO intermediates on Cu(I) sites is essential for durable electrolysis. guided by this insight, we design hollow Cu2O nanospheres for durable and selective CO2RR electrolysis in producing C2H4. Our work recognizes the previously overlooked passivation reconstruction and self-stabilizing behavior and highlights the critical role of the local atmosphere in modulating reconstruction and catalytic processes.

关键词： CO2 reduction reaction Electrocatalysts Cu2O Reconstruction Self-adaptive electrocatalysis

Natural history of persistent subretinal fluid following the successful repair of rhegmatogenous retinal detachment

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International Journal of Ophthalmology(English edition) 2020年第10期13卷 1621-1628页

作者： yan Fu Song Chen Zhao-Hui gu Yue-ling Zhang Li-Ying Li Na yang Clinical College of Ophthalmology Tianjin Medical UniversityTianjin 300000China Department of Ophthalmology Baoding First Central HospitalBaoding 071000Hebei ProvinceChina Tianjin Key Laboratory of Ophthalmology and Visual Science Tianjin Eye HospitalTianjin 300000China

AIM:To provide a detailed description of the natural history of persistent subretinal fluid(SRF)after successful repair of rhegmatogenous retinal detachment(RRD)and its association with visual ***:This was a prospective long-term follow-up for eyes undergoing scleral buckling(SB)surgery for maculaoff *** were carried out preoperatively and postoperatively at 1,3,6,9 and 12 mo,until persistent SRF had completely *** month postoperatively,optical coherence tomography(OCT)was used to classify SRF into three patterns:bleb-like loculated(BL),shallow-diffused(SD),and multiple blebs(MB).Serial OCT imaging was used to evaluate morphological changes in SRF until its complete *** were divided into two groups depending on the presence or absence of persistent ***:A total of 59 patients(59 eyes)were *** were no statistical differences between two groups at baseline,except for the proportion of patients with high myopia and a younger *** month after surgery,OCT detected persistent SRF in 49 eyes(83.1%).The 3 morphological patterns of SRF were observed in 27 eyes(55.1%)with BL,13 eyes(26.5%)with SD,and 9 eyes(18.4%)with *** mean time for complete absorption differed significantly across the three SRF patterns(F=8.097,P=0.001),which was 8.8±6.1,20.1±12.1,and 16.7±10.2 mo in BL,SD,and MB,*** 9 of the 13 eyes with SD,the pattern transformed into MB *** cases involving MB,the size and number of blebs decreased gradually until they had been completely *** with persistent SRF were more likely to demonstrate disruption of the ellipsoid zone(49.0%vs 10%,P=0.034).The final best-corrected visual acuity of two groups was 0.37±0.11(with SRF)vs 0.34±0.12(without SRF)logMAR(P=0.499),***:High preoperative myopia and younger age are associated with persistent *** is the most commonly observed pattern with the shortest duration and gradually *** cases involv

关键词： subretinal fluid rhegmatogenous retinal detachment optical coherence tomography visual acuity

Settlement mechanism of piled-raft foundation due to cyclic train loads and its countermeasure

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Earthquake Engineering and Engineering Vibration 2017年第3期16卷 499-511页

作者： gu Linlin Ye guanlin Wang Zhen ling Xianzhang Zhang Feng Department of Civil Engineering Qingdao University of Technology Department of Civil Engineering and State key Laboratory of Ocean Engineering Shanghai Jiaotong University Department of Geotechnical Engineering Tongji University Department of Civil Engineering Nagoya Institute of Technology

In this paper, numerical simulation with soil-water coupling finite element-finite difference（FE-FD） analysis is conducted to investigate the settlement and the excess pore water pressure（EPWP） of a piled-raft foundation due to cyclic high-speed（speed： 300km/h） train loading. To demonstrate the performance of this numerical simulation, the settlement and EPWP in the ground under the train loading within one month was calculated and confirmed by monitoring data, which shows that the change of the settlement and EPWP can be simulated well on the whole. In order to ensure the safety of train operation, countermeasure by the fracturing grouting is proposed. Two cases are analyzed, namely, grouting in No-4 softest layer and No-9 pile bearing layer respectively. It is found that fracturing grouting in the pile bearing layer（No-9 layer） has better effect on reducing the settlement.

关键词： high-speed train piled-raft foundation FEM settlement soil-pile interaction fracturing grouting.

An Improved Formulation of Singular Boundary Method

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Advances in Applied Mathematics and Mechanics 2012年第5期4卷 543-558页

作者： Wen Chen yan gu College of Harbour Coastal and Offshore EngineeringHohai UniversityNo.1 Xikang RoadNanjingJiangsu 210098China

This study proposes a new formulation of singular boundary method(SBM)to solve the 2D potential problems,while retaining its original merits being free of integration and mesh,easy-to-program,accurate and mathematically simple without the requirement of a fictitious boundary as in the method of fundamental solutions(MFS).The key idea of the SBM is to introduce the concept of the origin intensity factor to isolate the singularity of fundamental solution so that the source points can be placed directly on the physical *** paper presents a new approach to derive the analytical solution of the origin intensity factor based on the proposed subtracting and adding-back *** the troublesome sample nodes in the ordinary SBM are avoided and the sample solution is also not necessary for the Neumann boundary *** benchmark problems are tested to demonstrate the feasibility and accuracy of the new formulation through detailed comparisons with the boundary element method(BEM),MFS,regularized meshless method(RMM)and boundary distributed source(BDS)method.

关键词： Singular boundary method fundamental solution singularity desingularization technique meshless

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红景天在肿瘤患者化疗中的免疫功能调节作用

四川肿瘤防治 2007年第1期20卷 30-32页

作者：郑玲谷焰伍建容方道硕王晓毓张鸿彬成都铁路局中心医院肿瘤科四川成都610081

目的:观察红景天在肿瘤患者化疗中对机体免疫功能的影响及调节作用。方法:在肿瘤患者化疗期间用红景天连服20天,同时使用胸腺肽和空白对照对比观察72例肿瘤患者化疗前后体液免疫与细胞免疫功能的指标变化。结果:治疗1、2组肿瘤患者化疗... 详细信息

目的:观察红景天在肿瘤患者化疗中对机体免疫功能的影响及调节作用。方法:在肿瘤患者化疗期间用红景天连服20天,同时使用胸腺肽和空白对照对比观察72例肿瘤患者化疗前后体液免疫与细胞免疫功能的指标变化。结果:治疗1、2组肿瘤患者化疗前后细胞免疫功能无下降(P>0.05),对照组的细胞免疫功能有下降(P0.05)。结论:联合服用红景天能使肿瘤患者在肿瘤治疗中的细胞免疫保持相对的平稳,红景天是一种安全有效的免疫调节剂。

关键词：红景天细胞免疫体液免疫化疗

GMDH-Based Outlier Detection Model in Classification Problems

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Journal of Systems Science & Complexity 2020年第5期33卷 1516-1532页

作者： XIE ling JIA yanlin XIAO Jin gu Xin HUANG Jing School of Medical Information Engineering Zunyi Medical UniversityZunyi 563006China Business School Sichuan UniversityChengdu 610064China Soft Science Institute Sichuan UniversityChengdu 610064China School of Public Administration Sichuan UniversityChengdu 610064China

In many practical classification problems,datasets would have a portion of outliers,which could greatly affect the performance of the constructed *** order to address this issue,we apply the group method of data handin neural network in outlier *** study builds a GMDH-based outlier detectio *** model first implements feature selection in the training set L using GMDH neural *** a new training set L can be obtained by mapping the selected key feature ***,a linear regression model can be constructed in the set L by ordinary least squares ***,it eliminates a sample from the set L randomly every time,and then rebuilds a linear regression ***,outlier detection is realized by calculating Cook’s distance for each *** different customer classification datasets are used to conduct *** show that GOD model can effectively eliminate outliers,and compared with the five existing outlier detection models,it generally performs significantly *** indicates that eliminating outliers can effectively enhance classification accuracy of the trained classification model.

关键词： Classification problem Cook’s distance feature selection GMDH outlier detection