检索结果-南通市图书馆

两种不同成分X70M管线钢在HFW焊管中的应用

在线全文

学校读者我要写书评

暂无评论

钢管 2015年第2期44卷 55-58页

作者：胡松林肖光成宝山钢铁股份有限公司上海200940

介绍了两种不同成分X70M钢级管线钢(A钢和B钢)在HFW焊管上的应用,从化学成分、冲击韧性、DWTT性能、对接性能、焊管整体性能等方面分析了其在HFW制管过程中的性能变化情况。应用表明:A钢在制管后屈服强度和抗拉强度呈现较小的变化,质量... 详细信息

介绍了两种不同成分X70M钢级管线钢(A钢和B钢)在HFW焊管上的应用,从化学成分、冲击韧性、DWTT性能、对接性能、焊管整体性能等方面分析了其在HFW制管过程中的性能变化情况。应用表明:A钢在制管后屈服强度和抗拉强度呈现较小的变化,质量稳定性明显;B钢在制管后屈服强度有明显下降,抗拉强度无明显变化,有相对经济的制造成本优势;A钢和B钢在强度、韧性和焊接性方面均满足HFW制管工艺的要求。

关键词： HFW焊管 X70M钢级管线钢两种成分力学性能

在线全文

学校读者我要写书评

暂无评论

安阳文体中心全民健身及游泳馆结构设计

建筑结构 2022年第19期52卷 81-86,149页

作者：肖广成李虎林吴旭东李亚民陈方机械工业第六设计研究院有限公司郑州450007

安阳文体中心全民健身及游泳馆是安阳市文体中心重要的场馆之一,共设看台座席1 500余座。建筑主体采用钢筋混凝土框架结构,屋盖采用钢管桁架结构。梳理了建筑条件、抗震设防要求,明确了荷载取值,并选取合理的结构体系;本工程为特别不规... 详细信息

安阳文体中心全民健身及游泳馆是安阳市文体中心重要的场馆之一,共设看台座席1 500余座。建筑主体采用钢筋混凝土框架结构,屋盖采用钢管桁架结构。梳理了建筑条件、抗震设防要求,明确了荷载取值,并选取合理的结构体系;本工程为特别不规则结构,设计借鉴超限高层的相关要求,采用了多种结构计算程序对结构整体进行多遇地震下振型分解反应谱法、弹性时程分析补充计算以及罕遇地震下结构弹塑性分析;并采取了综合性的加强措施,达到了结构抗震性能化设计的预期目标。

关键词：安阳文体中心大跨屋盖特别不规则结构弹塑性时程分析抗震设计专项论证

在线全文

学校读者我要写书评

暂无评论

安阳文体中心体育场结构设计

建筑结构 2022年第17期52卷 104-112,148页

作者：李亚民李虎林肖广成李长征吴旭东机械工业第六设计研究院有限公司郑州450007

安阳文体中心体育场为4万座乙级体育场,采用混凝土框架看台、悬挑桁架罩棚。结合相关规范要求,从结构体系、概念设计、抗震性能设计等方面对复杂结构设计相关问题进行着重论述,采用多种结构有限元计算软件对屋盖和整体进行弹性、弹塑性... 详细信息

安阳文体中心体育场为4万座乙级体育场,采用混凝土框架看台、悬挑桁架罩棚。结合相关规范要求,从结构体系、概念设计、抗震性能设计等方面对复杂结构设计相关问题进行着重论述,采用多种结构有限元计算软件对屋盖和整体进行弹性、弹塑性分析,对屋盖的分叉柱支座铸钢节点进行了有限元分析,对超长混凝土看台进行了合理处理、释放温度应力。计算表明,通过合理地布置结构体系,采取适当的构造措施,可实现建筑形态和功能、满足结构的抗震性能要求。

关键词：安阳文体中心体育场大悬挑钢结构铸钢节点抗震性能设计弹塑性分析

X70M HFW管线管涂层前后性能变化的研究

在线全文

学校读者我要写书评

暂无评论

宝钢技术 2018年第2期11卷 49-52页

作者：屈献永肖光成赖兴涛宝山钢铁股份有限公司钢管条钢事业部上海201900

油气输送管线管一般都需涂层(3PE、FBE)等,涂层过程中需要中频感应加热钢管到某一温度以便涂层,在此过程中由于"时效"会使钢管性能有一定变化,但目前管线管标准如API SPEC 5L-45th、GB/T 9711—2011等只对光管规定了性能验收要求,而未... 详细信息

油气输送管线管一般都需涂层(3PE、FBE)等,涂层过程中需要中频感应加热钢管到某一温度以便涂层,在此过程中由于"时效"会使钢管性能有一定变化,但目前管线管标准如API SPEC 5L-45th、GB/T 9711—2011等只对光管规定了性能验收要求,而未对涂层后性能要求有所规定。研究选取了HFW焊管,X70M,406.40×8.00/9.56/10.70/12.70 mm,457.20×6.80/9.70 mm六种规格,做了涂层前后性能的对比,以便为管线试压、运行控制提供参考。

关键词： HFW焊管时效性能变化

在线全文

学校读者我要写书评

暂无评论

六西格玛在提高HFW厚壁管成材率中的应用

钢管 2013年第6期42卷 46-49页

作者：熊建辉肖光成沈江华宝山钢铁股份有限公司钢管条钢事业部上海201900

运用六西格玛方法,通过排列图、双样本T检验、非参数检验及方差分析等工具,找到了制约Φ610 mm HFW焊管机组厚壁管成材率的症结,并从成型焊接工艺优化、内毛刺刀杆改造等方面制定和实施改进措施。通过实施改进措施,Φ610 mm HFW焊管机... 详细信息

运用六西格玛方法,通过排列图、双样本T检验、非参数检验及方差分析等工具,找到了制约Φ610 mm HFW焊管机组厚壁管成材率的症结,并从成型焊接工艺优化、内毛刺刀杆改造等方面制定和实施改进措施。通过实施改进措施,Φ610 mm HFW焊管机组厚壁管的成材率提高了14.2%,成材率西格玛水平也从改进前的0.66提高到1.23。

关键词： HFW厚壁管成材率六西格玛排列图双样本T检验非参数检验

Nature inspired hierarchical structures in nano-cellular epoxy/graphene-Fe3O4 nanocomposites with ultra-efficient EMI and robust mechanical strength

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第8期103卷 177-185页

作者： Xun Fan Fengchao Wang Qiang Gao Yu Zhang Fei Huang Ronglin xiao Jianbin Qin Han Zhang Xuetao Shi guangcheng Zhang Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072PR China NPU-QMUL Joint Research Institute of Advanced Materials and Structures Northwestern Polytechnical UniversityXi’an 710072PR China Shaanxi Coal Chemical Industry Technology Research Institute Co.Ltd Xi’anShaanxi 710070PR China School of Engineering and Materials Science Queen Mary University of LondonMile End RoadLondon E14NSUK

Hierarchical layered structures,whether in a compact form like nacre or a porous manner like bone,are well known for their combined features of high stiffness,strength,and lightweight,inspiring many man-made materials and structures for high performance *** use of nacre/bone like hierarchical structures in polymer nanocomposites can achieve excellent mechanical and functional properties with high filler volume fractions after carefully aligning functional nanofillers,although the fabrication and processing remain a great *** this work,a bio-inspired lightweight nano-cellular epoxy/graphene-Fe_(3)O_(4) nanocomposite with high nanofiller loading of 75 wt.%was successfully fabricated by combining features from both nacre and bone structures,via a simple compression molding process together with an eco-friendly supercritical CO_(2) foaming process to achieve robust mechanical strength and excellent electromagnetic interference(EMI)shielding effectiveness(SE)*** aligned graphene-Fe_(3)O_(4) nanoplatelets with well controlled nanoscale porous structures(52.6 nm)enabled both low density(1.26 g/cm^(3))and high specific EMI SE>5200 dB/cm^(2)/g,as well as preserved tensile strength of 67 *** study provides a sustainable route to fabricate nature mimicked structures with high performance and high flexibility for a wide range of applications,from portable electronics to healthcare devices.

关键词： Epoxy foam Layered nano-cellular structures Graphene-Fe_(3)O_(4)nanocomposites Electromagnetic interference shielding

Insight-HXMT observations of the first binary neutron star merger GW170817

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2018年第3期61卷 26-33页

作者： TiPei Li ShaoLin Xiong ShuangNan Zhang FangJun Lu LiMing Song XueLei Cao Zhi Chang Gang Chen Li Chen TianXiang Chen Yong Chen YiBao Chen YuPeng Chen Wei Cui WeiWei Cui JingKang Deng YongWei Dong YuanYuan Du MinXue Fu GuanHua Gao He Gao Min Gao MingYu Ge YuDong Gu Ju Guan ChengCheng Guo DaWei Han Wei Hu Yue Huang Jia Huo ShuMei Jia LuHua Jiang WeiChun Jiang Jing Jin YongJie Jin Bing Li ChengKui Li Gang Li MaoShun Li Wei Li Xian Li xiaoBo Li XuFang Li YanGuo Li ZiJian Li ZhengWei Li xiaoHua Liang JinYuan Liao CongZhan Liu GuoQing Liu HongWei Liu ShaoZhen Liu xiaoJing Liu Yuan Liu YiNong Liu Bo Lu XueFeng Lu Tao Luo Xiang Ma Bin Meng Yi Nang JianYin Nie Ge OU JinLu Qu Na Sai Liang Sun Yin Tan Lian Tao WenHui Tao YouLi Tuo GuoFeng Wang HuanYu Wang Juan Wang WenShuai Wang YuSa Wang XiangYang Wen BoBing WU Mei Wu guangcheng xiao He Xu YuPeng Xu LinLi Yan JiaWei Yang Sheng Yang YanJi Yang AiMei Zhang ChunLei Zhang ChengMo Zhang Fan Zhang HongMei Zhang Juan Zhang Qiang Zhang Shu Zhang Tong Zhang Wei Zhang WanChang Zhang WenZhao Zhang Yi Zhang Yue Zhang YiFei Zhang YongJie Zhang Zhao Zhang ZiLiang Zhang HaiSheng Zhao JianLing Zhao xiaoFan Zhao ShiJie Zheng Yue Zhu YuXuan Zhu ChangLin Zou Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China Department of Physics Tsinghua University Beijing 100084 China University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100049 China Department of Astronomy Beijing Normal University Beijing 100088 China Department of Engineering Physics Tsinghua University Beijing 100084 China

Finding the electromagnetic （EM） counterpart of binary compact star merger, especially the binary neutron star （BNS） merger, is critically important for gravitational wave （GW） astronomy, cosmology and fundamental physics. On Aug. 17, 2017, Advanced LIGO and Fermi/GBM independently triggered the first BNS merger, GW170817, and its high energy EM counterpart, GRB 170817A, respectively, resulting in a global observation campaign covering gamma-ray, X-ray, UV, optical, IR, radio as well as neutrinos. The High Energy X-ray telescope （HE） onboard Insight-HXMT （Hard X-ray Modulation Telescope） is the unique high-energy gamma-ray telescope that monitored the entire GW localization area and especially the optical counterpart （SSS17a/AT2017gfo） with very large collection area （M000 cm2） and microsecond time resolution in 0.2-5 MeV. In addition, Insight-HXMT quickly implemented a Target of Opportunity （TOO） observation to scan the GW localization area for potential X-ray emission from the GW source. Although Insight-HXMT did not detect any significant high energy （0.2-5 MeV） radiation from GW170817, its observation helped to confirm the unexpected weak and soft nature of GRB 170817A. Meanwhile, Insight-HXMT/HE provides one of the most stringent constraints （-10-7 to 104 erg/cm2/s） for both GRB170817A and any other possible precursor or extended emissions in 0.2-5 MeV, which help us to better understand the properties of EM radiation from this BNS merger. Therefore the observation of Insight-HXMT constitutes an important chapter in the full context of multi-wavelength and multi-messenger observation of this historical GW event.

关键词： GW170817 BNS merger gravitational wave electromagnetic counterpart

Overview to the Hard X-ray Modulation Telescope (Insight-HXMT) Satellite

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2020年第4期63卷 2-19页

作者： Shuang-Nan Zhang TiPei Li FangJun Lu LiMing Song YuPeng X u CongZhan Liu Yong Chen XueLei Cao QingCui Bu Zhi Chang Gang Chen Li Chen TianXiang Chen YiBao Chen YuPeng Chen Wei Cui WeiWei Cui JingKang Deng YongWei Dong Yuan Yuan Du MinXue Fu GuanHua Gao He Gao Min Gao MingYu Ge YuDong Gu Ju Guan Can Gungor ChengCheng Guo DaWei Han Wei Hu Yue Huang Jia Huo ShuMei Jia LuHua Jiang WeiChun Jiang Jing Jin YongJie Jin Bing Li ChengKui Li Gang Li MaoShun Li Wei Li Xian Li xiaoBo Li XuFang Li YanGuo Li ZiJian Li ZhengWei Li xiaoHua Liang JinYuan Liao GuoQing Liu HongWei Liu ShaoZhen Liu xiaoJing Liu Yuan Liu YiNong Liu Bo Lu XueFeng Lu Tao Luo Xiang Ma Bin Meng Yi Nang JianYin Nie Ge Ou JinLu Qu Na Sai RenCheng Shang GuoHong Shen Liang Sun Ying Tan Lian Tao YouLi Tuo Chen Wang ChunQin Wang GuoFeng Wang HuanYu Wang Juan Wang WenShuai Wang YuSa Wang XiangYang Wen BaiYang Wu BoBing Wu Mei Wu guangcheng xiao ShaoLin Xiong LinLi Yan JiaWei Yang Sheng Yang YanJi Yang QiBin Yi Bin Yuan AiMei Zhang ChunLei Zhang ChengMo Zhang Fan Zhang HongMei Zhang Juan Zhang Qiang Zhang ShenYi Zhangs Shu Zhang Tong Zhang WanChang Zhang Wei Zhang WenZhao Zhang Yi Zhang YiFei Zhang YongJie Zhang Yue Zhang Zhao Zhang Zhi Zhang ZiLiang Zhang HaiSheng Zhao xiaoFan Zhao ShiJie Zheng JianFeng Zhou YuXuan Zhu Yue Zhu RenLin Zhuang Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Department of Astronomy Tsinghua UniversityBeijing 100084China Department of Physics Tsinghua UniversityBeijing 100084China Department of Astronomy Beijing Normal UniversityBeijing 100088China Department of Engineering Physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National Space Science Center Chinese Academy of SciencesBeijing 100190China

As China’s first X-ray astronomical satellite, the Hard X-ray Modulation Telescope (HXMT), which was dubbed as Insight-HXMT after the launch on June 15, 2017, is a wide-band(1-250 ke V) slat-collimator-based X-ray astronomy satellite with the capability of all-sky monitoring in 0.2-3 Me V. It was designed to perform pointing, scanning and gamma-ray burst(GRB)observations and, based on the Direct Demodulation Method (DDM), the image of the scanned sky region can be *** we give an overview of the mission and its progresses, including payload, core sciences, ground calibration/facility, ground segment, data archive, software, in-orbit performance, calibration, background model, observations and some preliminary results.

关键词： X-and γ-ray telescopes and instrumentation neutron stars black holes X-ray binaries γ-ray bursts

在线全文

学校读者我要写书评

暂无评论

略论西北地区旅游业的发展问题

干旱区地理 2000年第1期23卷 86-90页

作者：肖星李广成西北师范大学地理系兰州730070 酒泉教育学院酒泉735000

中国西北地区旅游资源丰富多彩 ,极具特色。改革开放以来 ,这里的旅游业虽有较快发展 ,但目前仍不发达 ,与自身突出的资源优势极不相称。西北旅游业要在即将到来的 2 1世纪获得大发展 ,心须彻底转变思想观念 ,科学制定发展规划 ,整体优... 详细信息

中国西北地区旅游资源丰富多彩 ,极具特色。改革开放以来 ,这里的旅游业虽有较快发展 ,但目前仍不发达 ,与自身突出的资源优势极不相称。西北旅游业要在即将到来的 2 1世纪获得大发展 ,心须彻底转变思想观念 ,科学制定发展规划 ,整体优化空间布局和多方采取有效措施。

关键词：西北地区旅游业发展问题