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Numerical Simulation of Injection Molding of three-Dimensional Thin Parts

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Computer Aided Drafting,Design and Manufacturing 1991年第1期2卷 29-34页

作者： YING Daoning WANG erjian cheng Wenxing LU Bin

This paper is concerned with the numerical simulation of the injection mold filling process. A mathematical model based on generalized Hele-Shaw flow for an inelastic non-Newtonian fluid under nonisothermal conditions is used.A hybrid numerical scheme is *** numerical simulating re- sults,pressure and temperature profile,location of the melt fronts,are in a good agreement with the ex- perimental ones.

关键词： Numerical Simulation Injection Molding

Fluctuating magnetic droplets immersed in a sea of quantum spin liquid

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The Innovation 2023年第5期4卷 33-40页

作者： Zihao Zhu Binglin Pan Linpeng Nie Jiamin Ni Yanxing Yang Changsheng Chen chengyu Jiang Yeyu Huang erjian cheng Yunjie Yu Jianjian Miao Adrian D.Hilier Xianhui Chen Tao Wu Yi Zhou Shiyan Li Lei Shu State Key Laboratory of Surface Phys ics and Department of PhysicsFudan UniversityShanghai 200433China CAS Key Laboratory of Stronglycoupled Quantum Matter Physics Department of PhysicsUniversity of Science and Technology of ChinaHefeiAnhui 230026China Department of Physics the University of Hong KongHong KongChina ISIS Pulsed Neutron and Muon Source STFC Rutherford Appleton LaboratoryHarwell CampusDidcotOxfordshire 0X110QXUK Collaborative Innovation Center of Advanced Micr ostructures Nanjing 210093China CAS Center for Excellence in Superconducting Electronics(CENSE) Shanghai 200050China Institute of Physics and Beijing National Laboratory for Condensed Matter Physics Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory DongguanGuangdong 523808China Kavli Institute for Theoretical Sciences and CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China Shanghai Research Center for Quantum Sciences Shanghai 201315China

The search of quantum spin liquid(QSL),an exotic magnetic state with strongly fluctuating and highly entangled spins down to zero temperature,is a main theme in current condensed matter ***,there is no smoking gun evidence for deconfined spinons in any QSL candidate so *** disorders and competing exchange interactions may prevent the formation of an ideal QSL state on frustrated spin *** we report comprehensive and systematic measurements of the magnetic susceptibility,ultralow-temperature specific heat,muon spin relaxation(μSR),nuclear magnetic resonance(NMR),and thermal conductivity for NaYbSe2 single crystals,in which Yb3+ions with effective spin-1/2 form a perfect triangular *** these complementary techniques find no evidence of long-range magnetic order down to their respective base ***,specific heat,μSR,and NMR measurements suggest the coexistence of quasi-static and dynamic spins in *** scattering from these quasi-static spins may cause the absence of magnetic thermal ***,we propose a scenario of fluctuating ferrimagnetic droplets immersed in a sea of *** may be quite common on the way pursuing an ideal QSL,and provides a brand new platform to study how a QSL state survives impurities and coexists with other magnetically ordered states.

关键词： NMR immersed quantum

Ultralow-temperature heat transport study of noncentrosymmetric superconductor CaPtAs

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Chinese Physics B 2023年第12期32卷 158-161页

作者：万一民程二建陈宇鑫赵成成涂成鹏戴东喆杨小帆辛路谢武袁辉球李世燕 State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200438China Leibniz Institute for Solid State and Materials Research(IFW-Dresden) 01069 DresdenGermany Center for Correlated Matter and School of Physics Zhejiang UniversityHangzhou 310058China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China Shanghai Research Center for Quantum Sciences Shanghai 201315China

The noncentrosymmetric superconductor CaPtAs with time-reversal symmetry breaking in its superconducting state was previously proposed to host nodal ***,by employing ultralow-temperature thermal conductivity measurement on CaPtAs single crystal,we study its superconducting gap structure.A negligible residual linear term of thermal conductivity(κ_(0)/T)in zero magnetic field and the field dependence ofκ_(0)/T indicate that CaPtAs has multiple superconducting gaps with a dominant s-wave *** is consistent with recent nuclear quadrupole resonance measurements on *** work puts a strong constraint on the theories to describe the superconducting pairing symmetry of CaPtAs.

关键词： noncentrosymmetric superconductor thermal conductivity superconducting gap structure

RE2(Cu1-xNix)5As3O2（RE=La,Pr,Nd）的反常穹顶状超导电性

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科学新闻 2020年第2期 142-142页

作者：郭建刚陈小龙 Xu Chen Jiangang Guo Chunsheng Gong erjian cheng Congcong Le Ning Liu Tianping Ying Qinghua Zhang Jiangping Hu Shiyan Li Xiaolong Chen 中国科学院物理研究所

文章简介超导电性与电荷密度波、自旋密度波或磁性相互作用的一个重要表现是铜酸盐、铁基和重费米子超导体中的穹顶状超导临界温度（Tc）,在不同的掺杂范围内可能会出现赝能隙、量子临界点和奇异金属等新奇物性,因此探索新型超导体中的... 详细信息

文章简介超导电性与电荷密度波、自旋密度波或磁性相互作用的一个重要表现是铜酸盐、铁基和重费米子超导体中的穹顶状超导临界温度（Tc）,在不同的掺杂范围内可能会出现赝能隙、量子临界点和奇异金属等新奇物性,因此探索新型超导体中的穹顶状Tc对探测突现效应很有意义。

关键词： RE=La,Pr,Nd x)Nix)5As3O2

A case study on behaviors of composite soil nailed wall with bored piles in a deep excavation

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Journal of Central South University 2013年第7期20卷 2017-2024页

作者： ZHU Feng-bin MIAO Lin-chang GU Huan-da cheng Yue-hong Institute of Geotechnical Engineering Southeast University Nanjing 210096 China School of Civil Engineering Suzhou University of Science and Technology Suzhou 215011 China Sttzhou erjian Construction Group Co. Ltd Suzhou 215131 China

A complete case of a deep excavation was explored. According to the practical working conditions, a 3D non-linear finite element procedure is used to simulate a deep excavation supported by the composite soil nailed wall with bored piles in soft soil. The modified cam clay model is employed as the constitutive relationship of the soil in the numerical simulation. Results from the numerical analysis are fitted well with the field data, which indicate that the research approach used is reliable. Based on the field data and numerical results of the deep excavation supported by four different patterns of the composite soil nailed wall, the significant corner effect is founded in the 3D deep excavation. If bored piles or soil anchors are considered in the composite soil nailed wall, they are beneficial to decreasing deformations and internal forces of bored piles, cement mixing piles, soil anchors, soil nailings and soil around the deep excavation. Besides, the effects due to bored piles are more significant than those deduced from soil anchors. All mentioned above prove that the composite soil nailed wall with bored piles is feasible in the deep excavation.

关键词： deep excavation 3D non-linear finite element bored pile composite soil nailed wall corner effect deformation internal force

运用三维重建与实时定位系统精确定位装配式构件

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建筑施工 2022年第5期44卷 965-968页

作者：胡纲何新叶泽浩张澄苏州二建建筑集团有限公司江苏苏州215122 西交利物浦大学江苏苏州215123

提高工程项目的装配率,能够节约材料,提高施工效率,实现精益建造。装配式施工期间,需有安装部件的定位信息,以及现有结构的几何情况。实时定位系统可用于跟踪组件的位置,而三维重建技术则能够还原现有结构几何情况。研究集成三维重建和... 详细信息

提高工程项目的装配率,能够节约材料,提高施工效率,实现精益建造。装配式施工期间,需有安装部件的定位信息,以及现有结构的几何情况。实时定位系统可用于跟踪组件的位置,而三维重建技术则能够还原现有结构几何情况。研究集成三维重建和实时定位系统的方法,以准确创建三维模型并跟踪组件,实现精确的装配式施工。提出在BIM平台上集成三维重建和RTLS系统的方法,并在施工现场对模块化项目进行案例研究,以讨论研究所提出方法的可行性。

关键词：三维重建实时定位系统装配式施工施工管理

台风作用下非工作状态塔式起重机动力响应研究

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施工技术（中英文） 2023年第8期52卷 103-107,140页

作者：杨赪张亚琦李强郏鸿韬蒋平平冯凯严俊伟宁波职业技术学院建筑工程学院浙江宁波315800 宁波第二技师学院浙江宁波315000 浙大宁波理工学院土木建筑工程学院浙江宁波315100 重庆交通大学土木工程学院重庆400074 浙江省二建建设集团有限公司浙江宁波315200

塔式起重机作为室外作业常用设备往往因台风影响而发生事故,当其处于非工作状态时,上部总成在强风作用下能自由回转。为研究台风作用下非工作状态塔式起重机安全性,通过气象站及倾角传感器测得“烟花”台风过境时某施工现场风向、风速... 详细信息

塔式起重机作为室外作业常用设备往往因台风影响而发生事故,当其处于非工作状态时,上部总成在强风作用下能自由回转。为研究台风作用下非工作状态塔式起重机安全性,通过气象站及倾角传感器测得“烟花”台风过境时某施工现场风向、风速及塔式起重机偏移量。结果表明,塔身偏移量随着高度升高而增大,而塔尖偏移量会受上部回转影响,且实际工程中塔式起重机存在风标效应导致其最大位移与最大风速时刻不对应,存在相对滞后现象。

关键词：台风非工作状态塔式起重机偏移量风向风速

吐哈盆地克尔碱向斜构造特征与砂岩型铀矿目的层沉积相、微相及其找矿意义

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东华理工大学学报（自然科学版） 2018年第4期41卷 315-327页

作者：姜美珠聂逢君张成勇严兆彬张鑫乔海明周伟核资源与环境国家重点实验室(东华理工大学) 江西南昌330013 核工业二〇三研究所陕西咸阳712000

吐哈盆地的砂岩型铀矿找矿进入了攻坚期,到目前为止,除了在盆地西南缘找到了有价值的工业铀矿化以外,其他地区多年来一直没有重要突破。盆地西部布尔加地区克尔碱向斜侏罗系地层西山窑组虽然发现了若干铀矿化线索,但近年的勘查进展不大... 详细信息

吐哈盆地的砂岩型铀矿找矿进入了攻坚期,到目前为止,除了在盆地西南缘找到了有价值的工业铀矿化以外,其他地区多年来一直没有重要突破。盆地西部布尔加地区克尔碱向斜侏罗系地层西山窑组虽然发现了若干铀矿化线索,但近年的勘查进展不大。究其原因,砂岩型铀矿的主要控制因素还没有完全弄清。本研究通过克尔碱向斜北、南、东部地区的野外露头地质调查,结合钻孔岩芯观察与镜下岩石鉴定,明确了北部的构造变形强,以逆冲断层和紧闭褶皱为特征;而南部的变形稍弱,主要是逆冲断层。铀矿目的层——中侏罗统西山窑组二段赋矿砂体主要沉积于辫状三角洲前缘河口坝微相环境,少量的为前缘席状砂微相环境。形成铀矿化的含铀含氧流体主要来自南部隆起区,渗入到西山窑组二段底部的水下分流河道砂体后,再进入河口坝砂体中形成铀矿化,仅少量的氧化流体能够到达前缘席状砂体中。综合分析表明,向斜南部目的层成矿潜力比北部的要好,下一步找矿工作应着重在南部开展。

关键词：砂岩型铀矿目的层沉积相微相克尔碱向斜吐哈盆地