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Asian Pacific Journal of Tropical Medicine 2013年第1期6卷 68-72页

作者： Feng Chen jian.Jun Li Tao Liu Guo-Qiang Wen wei Xiang Department of Radiology People's Hospital of Hainan Province Department of Neurology People's Hospital of Hainan Province Department of Pediatrics People's Hospital of Hainan Province

Objective:To investigate clinical and neuroimaging features of enterovirus71(EV71) related acute flaccid paralysis in patients with hand-fool-mouth ***:Nine patients with acute flaccid paralysis met the criterion of EV71 induced hand-foot-mouth disease underwent spinal and brain MR imaging from May 2008 to Sep ***:One extremity flaccid was found in four cases(3 with lower limb,1 with upper limb),two limbs flaccid in three cases(2 with lower limbs,1 with upper limbs),and four limbs flaccid in two *** MRI studies showed lesion with high signal in T2-weighted images(T2WI) and low signal T1-weighted images(T1WI) in the spinal cord of all nine cases,and the lesions were mainly in bilateral and unilateral anterior hom of cervical spinal cord and spinal cord below thoracic 9(T9) *** addition,the midbrain,pons, and medulla,which were involved in 3 cases with brainstem encephalitis,demonstrated abnormal ***,spinal cord contrast MRI studies showed mild enhancement in corresponding anterior hom of the involved side,and strong enhancement in its ventral ***: EV71 related acute flaccid paralysis in patients with hand-foot-mouth disease mainly affected the anterior hom regions and ventral root of cervical spinal cord and spinal cord below T9 level. MR imaging could efficiendy show the characteristic pattern and extent of the lesions which correlated well with the clinical features.

关键词： Enterovirus infection Hand-foot-mouth disease Acute flaccid paralysis Magnetic resonance imaging

Genetic Analysis and Molecular Mapping of Novel White Striped Leaf Mutant Gene in Rice

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Rice science 2013年第5期20卷 336-342页

作者： SHENG Zhong-hua wei Xiang-jin SHAO Gao-neng SONG jian.LUO Ju HU Pei-song TANG Shao-qing CHEN Li-yun Rice Research Institute Hunan Agricultural University China National Rice Research Institute

A new white striped leaf mutant wsll was discovered from Nipponbare mutated by ethyl methanesulfonate. The mutant showed white striped leaves at the seedling stage and the leaves gradually turned green after the tillering stage. The chlorophyll content of wsll was significantly lower than that of wild-type during the fourth leaf stage, tillering stage and booting stage. The numbers of chloroplast, grana and grana lamella were reduced and the thylakoids were degenerated in wsll compared with wild type. Genetic analysis showed that the wsll was controlled by a single recessive gene. Molecular mapping of the wsll was performed using an F2 population derived from wsll/Nanjing 11. The wsll was finally mapped on the telomere region of chromosome 9 and positioned between simple sequence repeat markers RM23742 and RM23759 which are separated by approximately 486.5 kb. The results may facilitate map-based cloning of wsll and understanding of the molecular mechanism of the regulation of leaf-color by WSL1 in rice.

关键词： rice white striped leaf mutant genetic analysis gene mapping

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装配式排架混凝土碱骨料反应诊断与加固治理

中国高新科技 2024年第10期 91-94页

作者：汪秀石伍敏程建王薇程徐进安徽省建控建设工程质量检测有限公司安徽合肥230093 安徽建大建筑结构设计事务所有限公司安徽合肥230051 安徽建大控股集团有限公司工程鉴定加固研究院安徽合肥230051

文章阐述了工程实例结构长期开裂和检测过程。勘测了排架柱混凝土现场破坏的宏观特征,并对粗骨料进行分类。基于能谱分析,水泥浆体MgO含量不是造成排架柱混凝土胀裂的主要原因;类型一的骨料-水泥石截面过渡区碱性氧化物(K、Na离子)产生... 详细信息

文章阐述了工程实例结构长期开裂和检测过程。勘测了排架柱混凝土现场破坏的宏观特征,并对粗骨料进行分类。基于能谱分析,水泥浆体MgO含量不是造成排架柱混凝土胀裂的主要原因;类型一的骨料-水泥石截面过渡区碱性氧化物(K、Na离子)产生渗透反应,诊断为碱-硅酸反应。根据试验结果,芯样膨胀率平均值均大于0.04%,确证了排架柱混凝土胀裂破坏由碱骨料反应所致。对此,采用注胶封缝和增设隔离夹层方法治理原排架柱碱骨料反应;采用新增箱形截面排架柱等效置换承载力方法进行加固处理。

关键词：碱骨料反应混凝土装配式排架诊断加固治理

Additive manufacturing and foundry innovation

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China Foundry 2021年第4期18卷 286-295页

作者： Yu-sheng Shi jin-liang Zhang Shi-feng Wen Bo Song Chun-ze Yan Qing-song wei Jia-min Wu Ya-jun Yin jian.xin Zhou Rui Chen wei Zhou He-ping Jia Huan-qing Yang Hai Nan State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Engineering Research Center of Ceramic Materials for Additive Manufacturing Ministty of EducationWuhan 430074China Shenyang Research Institute of Foundry Co. Ltd.Shenyang 110011China Liaoning Senyuan Additive Manufacturing Technology Co.Ltd.Anshan 114000LiaoningChina jian.su Jiuyu Machinery Co. LtdSuzhou 215300China Xi'an Space Engine Company Co. Ltd.Xi'an 710100China Beijing Institute of Aeronautical Materials Beijing 100095China

Additive manufacturing is expected to transform and upgrade the traditional foundry industry to realize the integrated manufacturing and rapid and low-cost development of high-performance components with complex *** additive manufacturing technology commonly applied in casting mold preparation(fusible molds,sand molds/cores and ceramic cores)mainly includes selective laser sintering(SLS)and binder injection three-dimensional printing(3DP).In this work,the research status of SLS/3DP-casting processes on material preparation,equipment development,process optimization,simulation and application cases in aerospace,automotive and other fields were ***,the developing trends of the additive manufacturing technology in the future of foundry field are introduced,including multi-material sand molds(metal core included),ceramic core-shell integration and die-casting dies with conformal cooling runners.

关键词： additive manufacturing foundry selective laser sintering 3D printing multiple materials die-casting dies

Synergistic electronic interaction between ruthenium and nickel-iron hydroxide for enhanced oxygen evolution reaction

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Rare Metals 2022年第8期41卷 2606-2615页

作者： Hao Cui Han-Xiao Liao Zhi-Lu Wang jian.Ping Xie Peng-Fei Tan De-wei Chu Pan Jun State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083China chool of Minerals Processing and Bioengineering Central South UniversityChangsha410083China School of Materials Science and Engineering University of New South WalesSydney2052Australia

The efficiency of electrochemical water splitting is extremely hampered by the sluggish oxygen evolution reaction(OER)occurred at the ***,developing high-performance OER electrocatalysts is crucial for realizing the industrialized application of water ***,a high-efficiency electrocatalyst of ruthenium-decorated nickel-iron hydroxide(10 Ru-NiFe LDH)supported on Ni foam is successfully synthesized for *** NiFe LDH with ruthenium can optimize the electronic density to form high valences of metal sites,which is beneficial to promote its OER ***,the 10 Ru-NiFe LDH only needs a low overpotential of 222 mV to achieve a current density of50 mA,cm^(-2),which exhibits fast OER kinetics with a small Tafel slope of 58 ***^(-1).Moreover,this electrocatalyst shows high stability over 20 h at a high current density of 100 mA·cm^(-2)without obvious *** decent OER performances can be ascribed to the increased active sites and the synergistic electronic interactions among Ni,Fe and *** work provides an effective approach for designing desirable electrocatalysts for OER.

关键词： Ru-decorated NiFe hydroxide Electronic interaction Electrocatalyst Oxygen evolution reaction(OER)

Effect of Extrusion Temperature on the Microstructure and Mechanical Properties of Mg–5Al–2Ca Alloy

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Acta Metallurgica Sinica(English Letters) 2015年第8期28卷 1015-1023页

作者： Kun Su Kun-kun Deng Fang-jun Xu Kai-bo Nie Li Zhang Xiao Zhang wei-jian.Li College of Materials Science and Engineering Shanxi Key Laboratory of Advanced Magnesium-Based MaterialsTaiyuan University of Technology

In this work, the Mg–5Al–2Ca alloy was extruded at 573, 623 and 673 K, with a ratio of 16：1 and a constant speed of 3 mm/s. Results demonstrate that the Al2Ca particle is formed in Mg–5Al–2Ca alloy. The size, amount and distribution of Al2Ca particles are influenced evidently by extrusion temperature. Unlike previous reports, the intensity of basal texture increases with increasing extrusion temperature, and the reasons are analyzed and given. Even though the average grain size increases as the extrusion temperature increased from 573 to 623 K, the YS, UTS and elongation of asextruded Mg–5Al–2Ca alloy are almost kept the same at 573 and 623 K. The reason is speculated as the balance of grain size, Al2Ca phase and texture at the two temperatures. The work hardening rate depends on extrusion temperature, and the largest θ value of Mg–5Al–2Ca alloy is obtained when the extrusion was performed at 623 K.

关键词： Mg–Al–Ca alloy Extrusion Microstructure Mechanical properties Work hardening

Field-Aligned Electrons in Polar Region Observed by Cluster on 30 September 2001

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Chinese Physics Letters 2012年第9期29卷 244-247页

作者： ZHANG Zi-Ying SHI jian.Kui CHENG Zheng-wei Andrew Fazakerley State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190 MSSL University College LondonUK

The physical process in the Earth's polar region is very complex and still needs to be further *** the data from Cluster satellite measurement,an analysis on field-aligned electrons in the mid-latitude cusp on 30 September 2001 has been *** satellite observed a down-flowing electron event in the low-latitude boundary and a sequential up-flowing electron event in the high-latitude boundary of the cusp *** down-flowing electron had a velocity as high as 500 km/s and a flux of 2.0×10^(9) cm^(-2)-s^(-1).The up-flowing electron had a velocity up to 1200 km/s and a flux of 4.9×10^(9) cm^(-2)-s^(-1).Both the velocity and the flux observed in this event are the maximum values of the up-flowing electrons observed by all satellites to *** electron is the main contributor for the field-aligned current in this *** physical mechanism is also *** down-flowing electron in the low-latitude boundary of the cusp region may result from solar wind injecting during the southward IMF,and the up-flowing electrons in the high-latitude boundary of cusp may result from mirroring of the solar wind,or from the ionospheric up-flowing electrons which have been accelerated.

关键词： latitude Earth flowing

Enhanced electrocaloric effect at room temperature in Mn^(2+) doped lead-free(BaSr)TiO_(3) ceramics via a direct measurement

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Journal of Advanced Ceramics 2021年第3期10卷 482-492页

作者： Xiang NIU Xiaodong jian.Xianyi CHEN Haoxuan LI wei LIANG Yingbang YAO Tao TAO Bo LIANG Sheng-Guo LU Guangdong Provincial Research Center on Smart Materials and Energy Conversion Devices Guangdong Provincial Key Laboratory of Functional Soft Condensed MatterSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Dongguan South China Design Innovation Institute Dongguan 523808China

(Ba_(1-x)Sr_(x))(MnyTi1-y)O_(3)(BSMT)ceramics with x=35,40 mol%and y=0,0.1,0.2,0.3,0.4,0.5 mol%were prepared using a conventional solid-state reaction *** dielectric and ferroelectric properties were characterized using impedance analysis and polarization-electric field(P-E)hysteresis loop measurements,*** adiabatic temperature drop was directly measured using a thermocouple when the applied electric field was *** results indicate that high permittivity and low dielectric losses were obtained by doping 0.1-0.4 mol%of manganese ions in(BaSr)TiO_(3)(BST)specimens.A maximum electrocaloric effect(ECE)of 2.75 K in temperature change with electrocaloric strength of 0.55 K·(MV/m)^(-1)was directly obtained at~21℃and 50 kV/cm in Ba_(0.6)Sr_(0.4)Mn_(0.001)Ti_(0.999)O_(3) sample,offering a promising ECE material for practical refrigeration devices working at room temperature.

关键词： barium strontium titanate ceramics permittivity dielectric loss electrocaloric effect electrocaloric strength

Tunneling Anisotropic Magnetoresistance in L1_0-MnGa Based Antiferromagnetic Perpendicular Tunnel Junction

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Chinese Physics Letters 2018年第8期35卷 88-92页

作者： Xu-Peng Zhao Da-Hai wei Jun Lu Si-wei Mao Zhi-Feng Yu jian.Hua Zhao State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083 College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049

We report on the tunneling anisotropic magnetoresistance in antiferromagnetic perpendicular tunnel junction consisting of L10-MnGa/FeMn/AlOx/Pt grown on GaAs（001） substrates by molecular-beam epitaxy. The temperature-dependent perpendicular exchange bias effect reveals an exchange coupling between ferromagnetic L10-MnGa and antiferromagnetic FeMn. The rotation of antiferromagnetic spins in FeMn can be driven by perpendicularly magnetized L10-MnGa due to the exchange-spring effect at the interface and leads to roomtemperature tunneling anisotropic magnetoresistance ratio of 0.86%. We also find that the tunneling anisotropic magnetoresistance strongly depends on temperature and angle. These results have broadened the material selection range for high performance antiferromagnetic spintronic devices.

关键词： AFM LRS HRS As Pt Ga

Preparation of sinter with low reduction degradation index for COREX reduction in a high proportion

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Journal of Iron and Steel Research International 2023年第4期30卷 635-649页

作者： Sheng-hu Lu jian.Pan Si-wei Li De-qing Zhu Zheng-qi Guo Yue Shi Ben-jing Shi School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina National Engineering Research Center of Sintering and Pelletizing Equipment System Zhongye Changtian International Engineering Co.Ltd.Changsha 410205HunanChina

The sinter with low reduction degradation index(RDI)for COREX reduction was prepared by separated granulation sintering *** results illustrate that the productivity and tumble index are attained to be 1.64 t m^(-2)h^(-1)and 59.25%,respectively,in pot tests under the optimal *** the reducing condition simulating COREX shaft furnace,RDI_(+6.3 mm),RDI_(+3.15 mm),and reducibility index of the sinter reach 63.05%,81.52%,and 83.65%,*** with traditional sintering process,the productivity rose by 14.69%,and RDI_(+6.3) mm and RDI_(+3.15) mm were increased by 157.54%and 32.70%,*** addition,as the proportion of sinter reached 60%,RDI_(+6.3 mm)and RDI_(+3.15 mm)of comprehensive burden were achieved to be 73.39%and 84.28%,respectively,which could completely meet the requirement of COREX shaft furnace for *** mechanism was demonstrated that the more silicoferrites of calcium and aluminum and silicate phase occurred as well as magnetite,and the amount of Fe_(2)O_(3)decreased substantially in the sinter by separated granulation sintering ***,the low-temperature reducing stress is restrained,with the increase in sinter strength.

关键词： COREX Sintering Separated granulation Reduction degradation index Comprehensive burden Microstructure