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Coupling Thermomechanical and Microstructural FE Analysis in Plate Rolling Process

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Journal of Iron and Steel Research International 2008年第4期15卷 42-50页

作者： LI Xue-tong WANG Min-ting DU Feng-shan College of Mechanical Engineering Yanshan University Qinhuangdao 066004 Hebei China

Using three-dimensional rigid-viscoplastic finite element method （FEM）, a coupling multivariable numerical simulation model for steel plate rolling has been established based on the physical metallurgy microstructural evolution rule and experiential equations. The effects of reduction, deformation temperature, and rolling speed on the deformation parameters and microstructure in plate rolling were investigated using the model. After a typical rolling process of steel plate 16Mn is simulated, the strain, temperature, and microstructure distributions are presented, as well as the ferrite grain transformation during the period of cooling. By comparing the calculated ferrite grain sizes with measured ones, the model is validated.

关键词： hot rolling plate FEM microstructure coupling

Probabilistic and Hierarchical Quantum Information Splitting Based on the Non-Maximally Entangled Cluster State

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Computers, Materials & Continua 2021年第10期69卷 339-349页

作者： Gang Xu Rui-ting shan Xiu-Bo Chen Mianxiong Dong Yu-Ling Chen School of Information Science and Technology North China University of TechnologyBeijing100144China Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing100876China Muroran Institution of Technology Muroran050-8585Japan State Key Laboratory of Public Big Data College of Computer Science and TechnologyGuizhou UniversityGuiyang550025China

With the emergence of classical communication security problems,quantum communication has been studied more *** this paper,a novel probabilistic hierarchical quantum information splitting protocol is designed by using a non-maximally entangled four-qubit cluster ***,the sender Alice splits and teleports an arbitrary one-qubit secret state invisibly to three remote agents Bob,Charlie,and *** agent David is in high grade,the other two agents Bob and Charlie are in low ***,the receiver in high grade needs the assistance of one agent in low grade,while the receiver in low grade needs the aid of all *** introducing an ancillary qubit,the receiver’s state can be inferred from the POVM measurement result of the ancillary ***,with the help of other agents,the receiver can recover the secret state probabilistically by performing certain unitary operation on his own *** addition,the security of the protocol under eavesdropping attacks is *** this proposed protocol,the agents need only single-qubit measurements to achieve probabilistic hierarchical quantum information splitting,which has appealing advantages in actual *** a probabilistic hierarchical quantum information splitting protocol hierarchical is expected to be more practical in multipartite quantum cryptography.

关键词： Cluster state hierarchical quantum information splitting probabilistic non-maximally entangled states

FEM Simulation of Large Diameter Pipe Bending Using Local Heating

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Journal of Iron and Steel Research International 2006年第5期13卷 25-29页

作者： LI Xue-tong WANG Min-ting DU Feng-shan XU Zhi-qiang College of Mechanical Engineering Yanshan University Qinhuangdao 066004 Hebei China

With the aid of elastic plastic large deformation finite element method （FEM）, an elastic plastic and cou pling thermo-mechanical model was built to calculate the bending process of the bent pipe, combining with local heating or cooling of the bent pipe. Based on the FEM simulation, the metal deformation during the bending process was analyzed in detail. The thinning and thickening ratio of the pipe wall thickness, the ovality of the cross section of the pipe and the spring back angle, etc. , are presented.

关键词： bent pipe finite element method local heating simulation

Ultra-small Pd clusters supported by chitin nanowires as highly efficient catalysts

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Nano Research 2018年第6期11卷 3145-3153页

作者： Xianglin Pei Yi Deng Bo Duan ting-shan Chan Jyh-Fu Lee Aiwen Lei Lina Zhang College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China "National Synchrotron Radiation Research Center' Hsinchu 30076 Taiwan China

For the first time, chitin microspheres woven from nanowires with multi-scale porous structures were used as an excellent support for a catalyst of ultra-small Pd clusters. The Pd species anchored on the precursor Pre-Pd@chitin were 0.6 nm in average size, while the reduced catalyst Red-Pd@chitin featured ultra-small particles of 1.3 nm in average size. X-ray absorption spectroscopy （XAS） and transmission electron microscopy （TEM） demonstrated that the Pd catalyst in both oxidative and reductive states retained good dispersity and ultra-small clusters. The catalyst was tested for the hydrogenation of p-nitroanisole, exhibiting an excellent initial rate （13× that of commercial Pd/C） and excellent turnover frequency reaching 52,000 h^-1. Furthermore, the catalyst could be recycled and used more than 10 times with no decay of the catalytic activity, suggesting potential industrial applications.

关键词： Pd clusters chitin nanowires supported catalyst hydrogenation

S incorporated RuO_(2)-based nanorings for active and stable water oxidation in acid

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Nano Research 2022年第5期15卷 3964-3970页

作者： Qing Yao Zhiyong Yu Ying-Hao Chu Yu-Hong Lai ting-shan Chan Yong Xu Qi Shao Xiaoqing Huang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Department of Materials Science and Engineering "National Yang Ming Chiao Tung University"Hsinchu 30010TaiwanChina "National Synchrotron Radiation Research Center" 101 Hsin-Ann RoadHsinchu 30076TaiwanChina Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China

The design of highly active and stable RuO_(2)-based nanostructures for acidic oxygen evolution reaction(OER)is extremely important for the development of water electrolysis technology,yet remains great *** here demonstrate that the incorporation of S into RuCuO nanorings(NRs)can significantly enhance the acidic OER *** investigations show that the incorporation of S can optimize the interaction of Ru and O,and therefore significantly suppresses the dissolution of Ru in acidic *** optimized catalyst(SH-RuCuO NRs)displays superior OER performance to the commercial RuO_(2)/***,the SH-RuCuO NRs can exhibit significantly enhanced stability for 3,000 cycles of cyclic voltammetry test and more than 250 h chronopotentiometry test at 10 mA·cm^(-2)in 0.5 M H_(2)SO_(4).This work highlights a potential strategy for designing active and stable RuO_(2)-based electrocatalysts for acidic OER.

关键词： S incorporation RuCu nanoring stable acidic oxygen evolution reaction

Antimony oxides-protected ultrathin Ir-Sb nanowires as bifunctional hydrogen electrocatalysts

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Nano Research 2024年第3期17卷 1042-1049页

作者： Bingyan Xu Xuan Huang shangheng Liu Zhiwei Hu Cheng-Wei Kao ting-shan Chan Hongbo Geng Ying Zhang Xiaoqing Huang Country State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Max Planck Institute for Chemical Physics of Solids Dresden 01187Germany “National Synchrotron Radiation Research Center” Hsinchu 30076TaiwanChina School of Materials Engineering Changshu Institute of TechnologyChangshu 215500China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China

Developing electrocatalysts with fast kinetics and long-term stability for alkaline hydrogen oxidation reaction(HOR)and hydrogen evolution reaction(HER)is of considerable importance for the industrial production of green and sustainable ***,an ultrathin Ir-Sb nanowires(Ir-Sb NWs)protected by antimony oxides(SbO_(x))was synthesized as an efficient bifunctional catalyst for both HOR and HER under alkaline *** from the much higher mass activities of Ir-Sb nanowires than those of Ir nanowires(Ir NWs)and commercial Pt/C,the SbO_(x) protective layer also contributes to the maintenance of morphology and anti-CO poisoning ability,leading to the long-term cycling performance in the presence of ***,the Ir-Sb NW/SbO_(x) exhibits the highest catalytic activities,which are about 3.5 and 4.8 times to those of Ir NW/C and commercial Pt/C toward HOR,*** work provides that the ultrathin morphology and H_(2)O-occupied Sb sites can exert the intrinsic high activity of Ir and effectively optimize the absorption of OH*both in alkaline HER/HOR electrolysis.

关键词： Ir nanowire amorphous antimony oxides bifunctional mechanism hydrogen evolution reaction hydrogen oxidation reaction

Peer-to-Peer环境下多粒度Trust模型构造

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软件学报 2006年第1期17卷 96-107页

作者：张骞张霞文学志刘积仁 ting shan 东北大学计算机软件国家工程研究中心辽宁沈阳110179 School of Information Technology and Electronical Engineering University of QueenslandAustralia

信任是多方面的,在不同的应用场景中,同一节点在不同领域具有不同的可信度.现有信任模型粒度过于粗糙,不能很好地解决同一Peer节点在不同领域、不同方面的可信度计算问题.据此,提出一种新的Peer-to-Peer环境下的多粒度信任模型,并给出... 详细信息

信任是多方面的,在不同的应用场景中,同一节点在不同领域具有不同的可信度.现有信任模型粒度过于粗糙,不能很好地解决同一Peer节点在不同领域、不同方面的可信度计算问题.据此,提出一种新的Peer-to-Peer环境下的多粒度信任模型,并给出该模型的数值分析和分布式实现方法.分析及仿真结果表明,该模型与已有模型相比,在可信度计算的粒度、模型的安全性等方面有较大的提高.

关键词：对等网络本体信任树档案点多粒度信任模型

A comparison study on single metal atoms(Fe,Co,Ni)within nitrogen-doped graphene for oxygen electrocatalysis and rechargeable Zn-air batteries

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Chinese Chemical Letters 2023年第6期34卷 531-536页

作者： Shuai Xie Hongchang Jin Chao Wang Huanyu Xie Ying-Rui Lu ting-shan Chan Wensheng Yan Song Jin Hengxing Ji School of Chemistry and Material Sciences CAS Key Laboratory of Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei 230026China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China National Synchrotron Radiation Research Center 300 HsinchuTaiwanChina

Single atom catalysts(SACs)with atomically dispersed transition metals on nitrogen-doped carbon supports have recently emerged as highly active non-noble metal electrocatalysts for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),showing great application potential in Zn-air ***,because of the complex structure-performance relationships of carbon-based SACs in the oxygen electrocatalytic reactions,the contribution of different metal atoms to the catalytic activity of SACs in Zn-air batteries still remains *** this study,SACs with atomically dispersed transition metals on nitrogen-doped graphene sheets(M-N@Gs,M=Co,Fe and Ni),featured with similar physicochemical properties and M-N@C configurations,are *** comparing the on-set potentials and the maximum current,we observed that the ORR activity is in the order of Co-N@G>Fe-N@G>Ni-N@G,while the OER activity is in the order of Co-N@G>Ni-N@G>Fe-N@*** Zn-air batteries with Co-N@G as the air cathode catalysts outperform those with the Fe-N@G and Ni-N@*** is due to the accelerated charge transfer between Co-N@C active sites and the oxygen-containing *** study could improve our understanding of the design of more efficient bifunctional electrocatalysts for Zn-air batteries at the atomic level.

关键词： M-N@C catalysts Oxygen reduction reaction Oxygen evolution reaction Single atom catalysts Zn-air batteries

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珠海洪鹤大桥主桥施工关键创新技术

桥梁建设 2021年第6期51卷 126-131页

作者：陈山亭中铁大桥局集团第五工程有限公司江西九江332001

珠海洪鹤大桥主桥由磨刀门水道主航道桥和洪湾水道主航道桥2座斜拉桥串联而成,2座主航道桥均为主跨500 m的双塔双索面结合梁斜拉桥。该桥水中主墩均采用2.8 m钻孔灌注桩群桩基础,主梁采用钢-混结合梁结构。针对钻孔深度深、基岩倾角... 详细信息

珠海洪鹤大桥主桥由磨刀门水道主航道桥和洪湾水道主航道桥2座斜拉桥串联而成,2座主航道桥均为主跨500 m的双塔双索面结合梁斜拉桥。该桥水中主墩均采用2.8 m钻孔灌注桩群桩基础,主梁采用钢-混结合梁结构。针对钻孔深度深、基岩倾角大且强度高等施工难点,采用了“旋挖钻+回旋钻”的组合成孔技术,充分发挥2种钻机在不同地层的钻进性能优势,具有快速、优质、节能、环保等特点;针对超深多层串珠式溶洞成孔慢的难题,优化成孔钻头的结构形式,并利用反循环冲击钻成孔技术,不仅提高了溶洞成孔工效及成孔质量,而且有效避免了出现卡钻、偏孔等事故;针对主墩临近航道或位于浅滩区,大型船舶无法直接施工的难题,主墩墩顶区钢梁架设采用了无支架法快速架设技术,具有安全风险低、成本投入少等优点。

关键词：斜拉桥钻孔灌注桩旋挖钻回旋钻组合成孔技术反循环冲击钻无支架架设钢梁施工技术