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The medium-temperature dependence of jet transport coefficient in high-energy nucleus-nucleus collisions

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Nuclear Science and Techniques 2024年第7期35卷 173-191页

作者： Man Xie Qing-Fei Han en-ke wang Ben-Wei Zhang Han-Zhong Zhang key Laboratory of Atomic and Subatomic Structure and Quantum Control(MOE) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of MatterInstitute of Quantum Matter South China Normal UniversityGuangzhou510006China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear ScienceSouthern Nuclear Science Computing CenterSouth China Normal UniversityGuangzhou 510006China key Laboratory of Quark and Lepton Physics(MOE)and Institute of Particle Physics Central China Normal UniversityWuhan430079China

The medium-temperature T dependence of the jet transport coefficient̂q was studied via the nuclear modification factor RAA(p_(T))and elliptical flow parameter v_(2)(p_(T))for large transverse momentum p_(T) hadrons in high-energy nucleus-nucleus *** a next-to-leading-order perturbative QCD parton model for hard scatterings with modified fragmentation functions due to jet quenching controlled by q,we check the suppression and azimuthal anisotropy for large p_(T) hadrons,and extract q by global fits to RAA(pT)and v_(2)(pT)data in A+A collisions at RHIC and LHC,*** numerical results from the best fits show that q∕T^(3) goes down with local medium-temperature T in the parton jet *** with the case of a constant q∕T^(3),the going-down T dependence of q∕T^(3) makes a hard parton jet to lose more energy near T_(c) and therefore strengthens the azimuthal anisotropy for large pT *** a result,v_(2)(p_(T))for large pT hadrons was enhanced by approximately 10%to better fit the data at RHIC/*** the first-order phase transition from QGP to the hadron phase and the additional energy loss in the hadron phase,v_(2)(p_(T))is again enhanced by 5-10%at RHIC/LHC.

关键词： Jet quenching Jet transport parameter Hadron suppression Elliptic flow coefficient energy loss asymmetry

In situ direct reprogramming of astrocytes to neurons via polypyrimidine tract-binding protein 1 knockdown in a mouse model of ischemic stroke

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Neural Regeneration Research 2024年第10期19卷 2240-2248页

作者： Meng Yuan Yao Tang Tianwen Huang Lining ke en Huang key Laboratory of Brain Aging and Neurodegenerative Diseases of Fujian Province Fujian Medical UniversityFuzhouFujian ProvinceChina Department of Human Anatomy School of Basic Medical SciencesFujian Medical UniversityFuzhouFujian ProvinceChina Scientific Research Center School of Basic Medical SciencesFujian Medical UniversityFuzhouFujian ProvinceChina Department of Neurology Fujian Medical University Union HospitalFuzhouFujian ProvinceChina Fujian key Laboratory of Vascular Aging Fujian Medical UniversityFuzhouFujian ProvinceChina

In situ direct reprogramming technology can directly convert endogenous glial cells into functional neurons in vivo for central nervous system repair. Polypyrimidine tract-binding protein 1(PTB) knockdown has been shown to reprogram astrocytes to functional neurons in situ. In this study, we used AAV-PHP.e B-GFAP-sh PTB to knockdown PTB in a mouse model of ischemic stroke induced by endothelin-1, and investigated the effects of GFAP-sh PTB-mediated direct reprogramming to neurons. Our results showed that in the mouse model of ischemic stroke, PTB knockdown effectively reprogrammed GFAP-positive cells to neurons in ischemic foci, restored neural tissue structure, reduced inflammatory response, and improved behavioral function. These findings validate the effectiveness of in situ transdifferentiation of astrocytes, and suggest that the approach may be a promising strategy for stroke treatment.

关键词： astrocyte in situ direct reprogramming ischemic stroke miR-30 based shRNA neuron polypyrimidine tract-binding protein 1 transdifferentiation

Transcriptome analysis suggests broad jejunal alterations in Linghu’s obesity-diarrhea syndrome:A pilot study

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World Journal of Gastroenterology 2024年第21期30卷 2777-2792页

作者： Xiao-Tong Niu Xiang-Yao wang Yan wang ke Han Nan Ru Jing-Yuan Xiang en-Qiang Linghu Medical School of Chinese PLA Chinese PLA General HospitalBeijing 100853China Department of Gastroenterology The First Medical Center of Chinese PLA General HospitalBeijing 100853China School of Medicine Nankai UniversityTianjin 300071China

BACKGROUND Obesity is associated with a significantly increased risk for chronic diarrhea,which has been proposed as Linghu’s obesity-diarrhea syndrome(ODS);however,its molecular mechanisms are largely *** To reveal the transcriptomic changes in the jejunum involved in *** In a cohort of 6 ODS patients(JOD group),6 obese people without diarrhea(JO group),and 6 healthy controls(JC group),high-throughput sequencing and bioinformatics analyses were performed to identify jejunal mucosal mRNA expression alterations and dysfunctional biological *** another cohort of 16 ODS patients(SOD group),16 obese people without diarrhea(SO group),and 16 healthy controls(SC group),serum diamine oxidase(DAO)and D-lactate(DLA)concentrations were detected to assess changes in intestinal barrier *** The gene expression profiles of jejunal mucosa in the JO and JC groups were similar,with only 1 differentially expressed gene(DEG).The gene expression profile of the JOD group was significantly changed,with 411 DEGs compared with the JO group and 211 DEGs compared with the JC group,129 of which *** enrichment analysis of these DEGs showed that the biological processes such as digestion,absorption,and transport of nutrients(especially lipids)tended to be up-regulated in the JOD group,while the biological processes such as rRNA processing,mitochondrial translation,antimicrobial humoral response,DNA replication,and DNA repair tended to be down-regulated in the JOD *** DEGs(CDT1,NHP2,EXOSC5,EPN3,NME1,REG3A,PLA2G2A,and PRSS2)may play a key regulatory role in the pathological process of ODS,and their expression levels were significantly decreased in ODS patients(Pkers(DAO and D-LA)were significantly increased in all obese individuals(P<0.01),but were higher in the SOD group than in the SO group(P<0.001).CONCLUSION Compared with health

关键词： Obesity Chronic diarrhea Jejunum Transcriptome Intestinal barrier

e-A深度非弹性散射中胶子辐射振幅的新计算方法

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高能物理与核物理 2006年第5期30卷 417-422页

作者：郭云王恩科华中师范大学粒子物理研究所武汉430079

在e-A深度非弹性散射过程中,喷注穿过冷核介质时,多重散射诱导胶子辐射会导致对碎裂函数的修正及喷注的能量损失．前期研究中关于计算e-A深度非弹性散射中胶子辐射振幅的两种方法:螺旋振幅近似和微扰QCD严格计算都异常繁杂．本文发展了... 详细信息

在e-A深度非弹性散射过程中,喷注穿过冷核介质时,多重散射诱导胶子辐射会导致对碎裂函数的修正及喷注的能量损失．前期研究中关于计算e-A深度非弹性散射中胶子辐射振幅的两种方法:螺旋振幅近似和微扰QCD严格计算都异常繁杂．本文发展了一种新的方法,可以方便计算出多重散射导致胶子辐射的振幅,得到的碎裂函数的修正以及能量损失与严格计算的结果一致．

关键词：深度非弹性散射胶子辐射振幅碎裂函数修正喷注能量损失

Quaternary integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 1360-1394页

作者： Yong wang Mianping ZHenG Yuan LING Shuyuan XIANG Zhaogang SHAO kexin ZHANG Xue ke Xiao LIN Fang HAN Jian’en HAN Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 100037China Faculty of Earth Sciences China University of GeosciencesWuhan 430074China Chinese Academy of Geological Sciences Beijing 100037China Institute of Geological Survey China University of GeosciencesWuhan 430074China School of Earth Sciences East China University of TechnologyNanchang 330013China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China

The Quaternary strata on the Qinghai-Tibet Plateau contain rich information about the paleoclimate and environmental evolution,record the evolution process of the Quaternary regional tectonics,paleogeography,and geomorphology of the plateau,and are extremely important areas for studying the Quaternary geological events and regional environmental *** to a comprehensive analysis of the regional stratigraphic data and the development and evolution characteristics of the biota,based on the differences in the lithostratigraphic units,sedimentary characteristics,landforms,and drainage systems,the Quaternary strata on the Qinghai-Tibet Plateau and its surrounding areas are divided into five stratigraphic regions:the Tarim region,Loess Plateau region,Qinghai-Tibet Plateau region,Yunnan-Guizhou Plateau region,and India-Ganges *** Qinghai-Tibet Plateau stratigraphic region is divided into seven stratigraphic sub-regions:the West Kunlun-Karakorum,AltunQilian Mountains,Qaidam-Hehuang,East Kunlun-Bayan Har,Qiangtang,East Xizang-West Yunnan-West Sichuan,and Gangdise-Himalayan *** paper briefly describes the lithostratigraphic units of the seven stratigraphic sub-regions of the Qinghai-Tibet *** to the lithostratigraphic sequence and its sedimentary characteristics,stratigraphic contact relationship,formation age,and evolution of the biota in each stratigraphic sub-region,the Quaternary tectonic paleogeographic evolution of the Qinghai-Tibet Plateau is divided into four stages.(1)The inherited differential uplift stage since the Pliocene(2.6-1.8/1.5 Ma):the regional sedimentary differences were significant,and the stratigraphic distribution was limited,the alluvial-proluvial sandy conglomerate was widely developed along the piedmont,and fluvial and lacustrine deposits were developed in the low-lying areas between the mountains.(2)The mountain range flattening stage(1.8/1.5-1.2/0.8 Ma):the erosion unconformity surfaces around the pl

关键词： Quaternary stratigraphic sedimentary

华南师范大学建校暨物理学科建立90周年专题编者按

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物理学报 2023年第20期72卷 1-2页

作者：王恩科朱诗亮华南师范大学

华南师范大学赓续于1933年始建的广东省立勷勤大学师范学院,创校之始即有数理化系,1940年成立物理学系,1951年合并到华南师范学院物理学系.历经90年的建设与发展,物理学科培养的学生遍布海内外,成为各行各业的骨干和中坚,其中有中国科... 详细信息

华南师范大学赓续于1933年始建的广东省立勷勤大学师范学院,创校之始即有数理化系,1940年成立物理学系,1951年合并到华南师范学院物理学系.历经90年的建设与发展,物理学科培养的学生遍布海内外,成为各行各业的骨干和中坚,其中有中国科学院院士,从事教育、科研、党政机关工作的众多人才和知名企业家等,特别是培养了粤港澳大湾区物理学基础教育的中坚力量.

关键词：华南师范大学中国科学院院士物理学科粤港澳大湾区基础教育师范学院物理学系数理化

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相对论重离子碰撞中的喷注淬火效应

物理学报 2023年第20期72卷 3-15页

作者：张善良邢宏喜王恩科华南师范大学量子物质研究院原子亚原子结构与量子调控教育部重点实验室广东省高等学校物质结构与相互作用基础研究卓越中心广州510006 华南师范大学南方核科学计算中心粤港量子物质联合实验室广东省核物质科学与技术重点实验室广州510006

相对论重离子碰撞中产生了高温高密解禁闭的夸克胶子等离子体(QGP),研究QGP的性质是高能核物理目前最重要的物理目标之一.其中,应用喷注淬火作为硬探针研究QGP的性质是一个非常重要的手段.喷注淬火指的是相对论重离子碰撞中产生的高能... 详细信息

相对论重离子碰撞中产生了高温高密解禁闭的夸克胶子等离子体(QGP),研究QGP的性质是高能核物理目前最重要的物理目标之一.其中,应用喷注淬火作为硬探针研究QGP的性质是一个非常重要的手段.喷注淬火指的是相对论重离子碰撞中产生的高能部分子穿过QGP时,通过强相互作用导致的能量损失效应.本文主要介绍喷注淬火效应的最新研究进展,具体包含喷注淬火效应对强子、喷注和喷注子结构的介质影响,以及目前理论上面临的问题和困难.

关键词：相对论重离子碰撞夸克胶子等离子体喷注淬火

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翻译研究“文化转向”反思之反思

外国语文 2013年第1期29卷 96-99页

作者：王恩科重庆工商大学外语学院重庆400067

我国学界对翻译研究文化转向的反思既触及其哲学基础,质疑其对翻译学科疆界的消解,也从文化学派的一些重要观点入手予以反思,虽然取得了一些成果,但总体而言仍然不够全面,缺乏系统性,"破"有余而"立"不足,而且部分论证不够严谨,因此对文... 详细信息

我国学界对翻译研究文化转向的反思既触及其哲学基础,质疑其对翻译学科疆界的消解,也从文化学派的一些重要观点入手予以反思,虽然取得了一些成果,但总体而言仍然不够全面,缺乏系统性,"破"有余而"立"不足,而且部分论证不够严谨,因此对文化转向的反思,对文化学派理论的修正和完善还有很长的路要走。

关键词：翻译研究 “文化转向” 反思

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翻译文学批评中的价值主体与评价主体探索

外国语文 2014年第6期30卷 139-143页

作者：王恩科贵州师范大学外语学院贵州贵阳550001

从价值哲学的角度认识翻译文学批评是翻译文学批评研究的一个全新视角,目前学界对其中的价值主体与评价主体的认识存在一定的模糊和偏误,从而使得这一新的批评理论体系存在某种缺憾。论文详细阐释了翻译文学的价值主体和评价主体,指出... 详细信息

从价值哲学的角度认识翻译文学批评是翻译文学批评研究的一个全新视角,目前学界对其中的价值主体与评价主体的认识存在一定的模糊和偏误,从而使得这一新的批评理论体系存在某种缺憾。论文详细阐释了翻译文学的价值主体和评价主体,指出价值主体的确认是翻译文学评价的基础,价值主体的需要是评价标准的尺度来源;同时认为,翻译文学批评中的评价主体与价值主体既可能完全或部分重合,也可能相互分离,即使是完全和部分重合,逻辑上的区分也是十分重要的,否则极易影响翻译文学批评的有效性和合理性。

关键词：翻译文学价值哲学价值主体评价主体