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Observation of Antimatter Helium-4 nucleus

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IMP & HIRFL Annual Report 2011年第1期 51-51页

作者： Qiu Hao xu Hushan xu nu Chen xurong Chen Jiangbo Du Chengming Sun Zhiyu Wang Jiansong Xiao Guoqing Yang Yanyun Yuan Xiaohua Zhan Wenlong

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共建清洁美丽世界之土壤与地下水修复篇

中国环保产业 2022年第5期 30-38页

作者：孙宁徐怒潮尹惠琳李淑彩倪鑫鑫生态环境部环境规划院北京100012 北京高能时代环境技术股份有限公司北京100095

土壤是经济社会可持续发展的物质基础,土壤环境安全关系人民群众身体健康和生态环境安全,是支撑美丽中国和生态文明建设的重要基础,保护好土壤环境是推进生态文明建设和维护国家生态安全的重要内容。文章介绍了我国土壤与地下水修复行... 详细信息

土壤是经济社会可持续发展的物质基础,土壤环境安全关系人民群众身体健康和生态环境安全,是支撑美丽中国和生态文明建设的重要基础,保护好土壤环境是推进生态文明建设和维护国家生态安全的重要内容。文章介绍了我国土壤与地下水修复行业的发展现状,指出“十四五”时期我国将深入推进农用地和建设用地的空间调控、污染源头防控、风险管控和治理修复等。坚持源头治理、系统治理、整体治理,更加突出精准治污、科学治污、依法治污,为我国生态文明建设提供更加安全的土壤环境保障。

关键词：土壤与地下水修复行业发展机遇与挑战

低温高密核物质测量谱仪时间投影室的集团重建

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原子核物理评论 2021年第4期38卷 416-422页

作者：朱毅 Shyam Kumar 胡晨露陈梓轩张亚鹏赵凤仪魏向伦段利敏许怒仇浩中国科学院近代物理研究所兰州730000 中国科学院大学北京100049

低温高密核物质测量谱仪(CEE)是研究高重子数密度区核物质性质的重离子碰撞实验谱仪。使用了先进的SAMPA电子学读出芯片的时间投影室(TPC)是CEE最核心的探测器。在集团重建的过程中,同一排读出板的信号被首先重建成2维集团,然后根据2维... 详细信息

低温高密核物质测量谱仪(CEE)是研究高重子数密度区核物质性质的重离子碰撞实验谱仪。使用了先进的SAMPA电子学读出芯片的时间投影室(TPC)是CEE最核心的探测器。在集团重建的过程中,同一排读出板的信号被首先重建成2维集团,然后根据2维集团的ADC加权平均位置重建击中点。当信号ADC随漂移时间变化呈峰-谷-峰结构时,一个集团可能被重建成两个或更多击中点,从而提高双径迹分辨能力。使用模拟信号的测试显示,该重建算法在方向可以达到0.100/0.043 cm的位置分辨能力和1.1/2.8 cm的双径迹分辨能力。

关键词：低温高密核物质测量谱仪时间投影室集团重建

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富亮氨酸胶质瘤失活基因在胶质瘤中的表达

中华神经外科杂志 2008年第4期24卷 252-254页

作者：徐新女王金环王淑杰郭承承刘宏胜卢轶张益伟白雪天津市第一中心医院神经外科卫生部危重病急救医学重点实验室300192

目的探讨胶质瘤组织富亮氨酸胶质瘤失活基因1（LGI1）mRNA的表达及与细胞增殖活性之间的关系。方法采用逆转录聚合酶链反应（RT-PCR）法对30例脑胶质瘤组织、2例脑膜瘤、2例瘤旁及2例颅脑损伤内减压脑组织标本进行半定量检测，同时采用... 详细信息

目的探讨胶质瘤组织富亮氨酸胶质瘤失活基因1（LGI1）mRNA的表达及与细胞增殖活性之间的关系。方法采用逆转录聚合酶链反应（RT-PCR）法对30例脑胶质瘤组织、2例脑膜瘤、2例瘤旁及2例颅脑损伤内减压脑组织标本进行半定量检测，同时采用S-P免疫组化法检测Ki-67标记指数。结果脑胶质瘤组的LGI1 mRNA表达水平低于正常脑组织和脑膜瘤（P〈0．05）。脑胶质瘤中，WHO Ⅳ级的胶质瘤LGI1 mRNA表达低于WHO Ⅱ级和Ⅲ级胶质瘤（P〈0．05），与Ki-67标记指数呈负相关关系（r=-0．621，P〈0．01）。结论LGI1基因的表达与Ki-67标记指数呈负相关，提示LGI1与胶质瘤的发生关系密切。

关键词：神经胶质瘤富亮氨酸胶质瘤失活基因1(LGI1) 逆转录聚合酶链反应 Ki-67

Analysis of Multiple Annular Pressure in Gas Storage Well and High-Pressure Gas Well

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Energy Engineering 2023年第1期120卷 35-48页

作者： Lihu Cao Jinsheng Sun Bo Zhang nu Lu Yuqiang xu School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China Tarim Oilfield Company PetroChinaKorla841000China CNPC Research Institute of Safety and Environment Technology Beijing102206China Research Institute of Petroleum Exploration&Development PetroChinaBeijing100083China

In gas storage or high-pressure gas wells,annular pressure is an unavoidable threat to safe,long-term resource *** more complex situation,however,is multiple annular pressure,which means annular pressure happens in not only one annulus but two or *** a situation brings serious challenges to the identification of well ***,few researches analyze the phenomenon of multiple annular ***,this paper studies the mechanism of multi-annular pressure to provide a foundation for its prevention and ***,the multi-annular pressure is classified according to the mechanism and field *** the failure mechanism and function of the wellbore safety barriers in the process of passage formation are ***,some suggestions are put forward for identifying and controlling multi-annular *** results show that gas storage wells and high-pressure gas wells have the conditions to generate pressure channels,which leads to the expansion of annular pressure from a single annulus to multiple *** pressure channel is composed of the tubing string,casing string,and a cement mantle,and the failures among the three have causal and hierarchical *** to the channel direction,it can be divided into two types:tubing-casing annulus to casing annulus and casing annulus to the tubing-casing annulus,of which the former is more *** measures can be considered to prevent pressure channeling,including improvement of cementing quality,revision of maximum allowable annular pressure,and suitable frequency of pressure relief.

关键词： Multiple-annular pressure pressure channel generation mechanism identification and control

Study on the Mechanism of Fluid Percussion Injuries on Immune Cells

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医用生物力学 2019年第A1期34卷 131-132页

作者： Dasen xu nu Zhang Hui Yang Center of Special Environmental Biomechanics&Biomedical Engineering Northwestern Polytechnical University School of Life Sciences Northwestern Polytechnical University

Background Traffic accidents,anti-terrorism,gas and chemical dangerous goods explosions,earthquake shock wave damage,and falling impacts in daily life and other events involving impact loads cause great harm to human organs and tissues,and even *** injuries are called impact *** during the previous wars,the treatment of impact injuries has been greatly improved,and its treatment has been widely used in clinical ***,under the current development of society,the impact damage incident has not only been limited to the *** organizations,frequent industrial production accidents,aircraft trains and other accidents have extended the impact damage incidents into daily society,seriously jeopardizing the health of ***,in order to better treat the injured organs under the impact load,such as the reconstruction and recovery of organ tissues,it is necessary to establish a corresponding system of clinical treatment methods for impact *** vitro models of traumatic injury are helping elucidate the pathobiological mechanisms responsible for dysfunction and delayed cell functional variation after mechanical stimulation of the single waveform *** is likely that injury outcome is related to the biomechanical parameters of the traumatic event such as amplitudes and ***,the influence of impulsive pressure on endothelial function has not yet been fully studied in *** this study,we developed a pressure loading device that produced positive by modifying an in vitro fluid percussion model and examined the effects of the pressures on macrophages’basic *** To model variations in the biomechanical injury parameters and simplify the experiment,single-use syringe was chosen to be the cell container and a drop hammer driven fluid percussion injury system(FPI)was designed and built to generate a single waveform with adjustable peak pressure and *** macrophage cells(Raw

关键词： Study on the Mechanism Fluid Percussion Injuries Immune Cells

Excavation-induced microseismicity: microseismic monitoring and numerical simulation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第6期13卷 445-460页

作者： nu-wen xu Chun-an TANG Hong LI Feng DAI Ke MA Jing-dong SHAO Ji-chang WU State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resources and Hydropower Siehuan UniversityChengdu 610065China Institute o fRock Instability and Seismicity Research Dalian University of TechnologyDalian 116024China HydroChina Chengdu Engineering Corporation Chengdu 610072China China Guodian Dadu River Dagangshan Hydropower Development Co. Ltd.Ya'an 625409China

The volume of influence of excavation at the right bank slope of Dagangshan Hydropower Station, southwest China, is essentially determined from microseismic monitoring, numerical modeling and conventional measurements as well as in situ observations. Microseismic monitoring is a new application technique for investigating microcrackings in rock slopes. A micro- seismic monitoring network has been systematically used to monitor rock masses unloading relaxation due to continuous exca- vation of rock slope and stress redistribution caused by dam impoundment later on, and to identify and delineate the potential slippage regions since May, 2010. An important database of seismic source locations is available. The analysis of microseismic events showed a particular tempo-spatial distribution. Seismic events predominantly occurred around the upstream slope of 1180 m elevation, especially focusing on the hanging wall of fault XL316-1. Such phenomenon was interpreted by numerical modeling using RFPA-SRM code （realistic failure process analysis-strength reduction method）. By comparing microseismic activity and results of numerical simulation with in site observation and conventional measurements results, a strong correlation can he obtained between seismic source locations and excavation-induced stress distribution in the working areas. The volume of influence of the rock slope is thus determined. Engineering practices show microseismic monitoring can accurately diagnose magnitude, intensity and associated tempo-spatial characteristics of tectonic activities such as faults and unloading zones. The integrated technique combining seismic monitoring with numerical modeling, as well as in site observation and conventional surveying, leads to a better understanding of the internal effect and relationship between microseismic activity and stress field in the right bank slope from different perspectives.

关键词： Microseismic monitoring Rock slope numerical simulation Stability analysis Dagangshan Hydropower Station

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ALICE实验内径迹系统探测器升级

原子核物理评论 2020年第3期37卷 734-741页

作者：张彪张李昂邓文静刘军张文靖柳东海谭亚蕾王亚平孙向明殷中宝周代翠黄光明许怒华中师范大学夸克与轻子物理教育部重点实验室暨粒子物理研究所武汉430079 华中师范大学硅像素实验室武汉430079 中国科学院近代物理研究所兰州730000

大型重离子对撞实验(A Large heavy-Ion Collision Experiment,ALICE)按计划在大型强子对撞机(Large Hadron Collider,LHC)的第二次停机(2019—2021)期间进行探测器升级工作。为了对强相互作用物质——夸克胶子等离子体(Quark-Gluon Plasma,QGP)的性质进行更细致的研究,作为升级计划中重要的一个内容是把ALICE实验现有的内径迹系统探测器(Inner Tracking System,ITS)全面升级为基于单片有源像素传感器(Monolithic Active Pixel Sensor,MAPS)技术的硅像素探测器(习惯称之为ITS2),并在Run3和Run 4期间采集更多的铅核-铅核碰撞数据。新的ITS2共由7层(内3层,中间2层和外2层)探测桶面组成,共由24000余片尺寸为3cm×1.5cm的MAPS硅像素芯片(该芯片称之为ALPIDE)构成,有效探测面积达10m^(2),共约120亿像素。ALPIDE芯片厚度为50μm,单个像素的尺寸是27μm×29μm,该芯片具有低功耗、高空间分辨率和高速读出等特点。ITS2将使ALICE探测器在测量极低横动量粒子时具备优异的探测效率和碰撞参数分辨率,同时也使ALICE探测器适应于LHC高束流亮度环境。目前ITS2的探测器模块量产和测试已于2019年完成,并在欧洲核子中心(CERN)洁净室完成了7层桶面的组装与安装,于2020年完成试运行测试。2021年1月启动ITS2在ALICE探测器中的安装与试运行工作,计划于2021年5月底完成ITS2的安装与测试。本工作将对ALICE/ITS2的探测器结构、ALPIDE芯片和升级进展等方面进行介绍。

关键词： LHC ALICE 内径迹系统探测器单片有源像素传感器试运行

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惠州加速器集群装置及其未来发展

中国科学：物理学、力学、天文学 2020年第11期50卷 73-90页

作者：赵红卫徐瑚珊肖国青夏佳文杨建成周小红许怒何源马新文杨磊陈旭荣唐晓东赵永涛孙志宇王志光胡正国张军辉马力祯原有进詹文龙中国科学院近代物理研究所兰州730000 中国科学院北京100864

本文概述了基于粒子加速器的核物理研究主要的前沿方向和重要科学问题,分析了用于核物理研究的粒子加速器大科学装置发展现状和未来发展态势.国家"十二五"重大科技基础设施"强流重离子加速器装置"(High Intensity heavy-ion Accelerator... 详细信息

本文概述了基于粒子加速器的核物理研究主要的前沿方向和重要科学问题,分析了用于核物理研究的粒子加速器大科学装置发展现状和未来发展态势.国家"十二五"重大科技基础设施"强流重离子加速器装置"(High Intensity heavy-ion Accelerator Facility,HIAF)和"加速器驱动的嬗变研究装置"(China Initiative Accelerator Driven System,CiADS)正在广东惠州建设.以HIAF和CiADS为基础,本文提出建设用于核物理及其交叉前沿研究的大型带电粒子加速器集群装置——高亮度电子-离子研究装置(Bright Electron and Ion Research Facility,BEIF).依托BEIF装置拟开展的核物理前沿研究方向包括原子核结构、核天体物理、核子结构、夸克物质相结构,以及基础物理若干重要前沿与核物理的交叉,如高离化态原子物理、重离子驱动的高能量密度物理等.BEIF是由多台超导直线加速器、同步加速器、储存环、反应堆和各类大型实验探测器及实验终端等组成的大科学装置集群.BEIF计划分三期进行建设,建成后的装置将极大地推动我国的核物理和核科学技术研究能力的提升.

关键词：核物理带电粒子加速器加速器集群重离子束束流强度束流能量