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Strong Coupling of Magnetism and Lattice Induces Near-Zero Thermal Expansion over Broad Temperature Windows in ErFe10V2.xMox Compounds

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CCS Chemistry 2021年第3期3卷 1009-1015页

作者： Wenjie li Kun lin Yili cao Chengyi Yu Chin-wei Wang Xinzhi liu Kenichi Kato Yilin Wang Jiaou Wang Qiang li Jun Chen Jinxia Deng Hongjie Zhang Xianran Xing beijing Advanced Innovation Center for Materials Genome Engineering and institute of So{2.d State Chemistry University of Science and Technology BeijingBeijing 100083 Neutron Group National Synchrotron Radiation Research CenterHsinchu 30076 School of Physics Sun Yat-Sen UniversityGuangzhou 510275 RIKEN SPring-8 Center Hyogo 679-5148 institute of High Energy Physics Chinese Academy of SciencesBeijing 100049 State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022

Alloys with low thermal expansion could overcome thermal stress issues under temperature-fluctuated conditions and possess important application prospects,while they are restricted to finite chemical components and temperature *** this study,we report a novel class of near-zero thermal expansion(near ZTE)alloys,ErFe_(10)V_(2.x)Mo_(x),over a wide temperature range(12.–440 K).Neutron diffraction and magnetic measurements demonstrated that the ErFe_(10)V_(2.x)Mo_(x)compounds exhibited complex ferrimagnetic(FIM)structures below Curie temperature(TC).The near-ZTE behaviors were closely related to the itinerant Fe 3d moments in the collinear FIM states,as well as the geometric[−Fe−Fe−]***,X-ray absorption near-edge structure(XANES)spectra revealed that the nonmagnetic substitution changed the electronic valence states of Fe atoms,which,in turn,changed Fe 3d moments and TC,hence,regulating the thermal expansion *** work provides an insight into chemical modifications of thermal expansion in magnetic intermetallic compounds.

关键词： zero thermal expansion intermetallic compound magnetic structure neutron diffraction

Advances in artificial intelligence techniques drive the application of radiomics in the clinical research of hepatocellular carcinoma

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iliVER 2022年第1期1卷 49-54页

作者： Jingwei wei Meng Niu Ouyang Yabo Yu Zhou Xiaoke Ma Xue Yang Hanyu Jiang Hui Hui Hongyi {2. Binwei Duan Hongjun li Dawei Ding Jie Tian Key Laboratory of Molecular Imaging Institute of AutomationChinese Academy of SciencesBeijing 100190China beijing Key Laboratory of Molecular Imaging Beijing 100190China Department of Interventional Radiology The First Affiliated Hospital of China Medical UniversityShenyangLiaoning110000China beijing YouAn Hospital Capital Medical UniversityBeijing Institute of HepatologyBeijing100069China School of life Science and Technology Xidian UniversityXi'anChina School of Computer Science and Technology Xidian UniversityXi'anShaanxiChina Department of Radiology Beijing Youan HospitalCapital Medical UniverstiyBeijing100069China Department of Radiology West China HospitalSichuan UniversityChengduSichuan 610041China Department of Pathology College of Basic Medical ScienceChina Medical UniversityShenyangLiaoning110000China The Department of General Surgery Center Beijing YouAn HospitalCapital Medical UniversityChina School of Bioengineering Beihang UniversityBeijing100191China School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing 100083China beijing Advanced Innovation Center for Big Data-Based Precision Medicine School of Medicine Beihang UniversityBeijing100191China Engineering Research Center of Molecular and Neuro Imaging of Ministry of Education School of Life Science and TechnologyXidian UniversityXi'anShaanxi710126China

Hepatocellular carcinoma(HCC)remains the most common malignancy to threaten public health *** advances in artificial intelligence techniques,radiomics for HCC management provides a novel perspective to solve unmet needs in clinical settings,and reveals pixel-level radiological information for medical imaging big data,correlating the radiological phenotype with targeted clinical *** radiomics pipelines depend on handcrafted engineering features,and further deep learning-based radiomics pipelines are supplemented with deep features calculated via self-learning *** the past decade,radiomics has been widely applied in accurate diagnoses and pathological or biological behavior evaluation,as well as in prognosis *** this review,we systematically introduce the main pipelines of artificial intelligence-based radiomics and their efficacy in the clinical studies of HCC.

关键词： Artificial intelligence Diagnosis Hepatocellular carcinoma Prognosis Radiomics

Oxidation of a Zr_(46)Cu_(46)Al_(7)Gd_(1)bulk metallic glass detected via optical characterizations

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Science China Materials 2021年第4期64卷 973-978页

作者： weijie Xie Mingxing li Jiashu {2. liwei Hu Chao Wang wei-Hua Wang Yanhui liu institute of Physics Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China

Oxidation of metallic glasses has been shown to be different from crystalline alloys due to the disordered atomic structures and far-from-equilibrium state,and quick characterization is required to reveal their early stage *** this study,we investigated the oxidation behavior of a Zr_(46)Cu_(46)Al_(7)Gd_(1)bulk metallic glass by measuring the changes of optical constants via spectroscopic *** with X-ray diffraction,scanning electron microscopy,and thermogravimetric analyzer confirmed that the changes of pseudo-optical constants reflected not only the onset temperature at which the alloys underwent obvious oxidation,but also the subtle oxidation which was tedious to *** study suggests a more efficient and accurate approach to understand the oxidation of metallic glasses with temperature,time and compositions.

关键词： metallic glasses spectroscopic ellipsometry oxidation

Nitrogen‐doped graphene aerogel‐supported ruthenium nanocrystals for pH‐universal hydrogen evolution reaction

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chinese Journal of Catalysis 2022年第6期43卷 1535-1543页

作者： Yu Ding Kai‐Wen cao Jia‐wei He Fu‐Min {2. Hao Huang Pei Chen Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education)Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710062ShaanxiChina School of Sustainable Energy Materials and Science Jinhua Advanced Research InstituteJinhua 321000ZhejiangChina

The design and synthesis of high‐performance and low‐cost electrocatalysts for the hydrogen evolution reaction(HER),a key half‐reaction in water electrolysis,are *** to their modest hydrogen adsorption energy,ruthenium(Ru)‐based nanomaterials are considered outstanding candidates to replace the expensive platinum(Pt)‐based HER *** this study,we developed an adsorption‐pyrolysis method to construct nitrogen(N)‐doped graphene aerogel(N‐GA)‐supported ultrafine Ru nanocrystal(Ru‐NC)nanocomposites(Ru‐NCs/N‐GA).The particle size of the Ru‐NCs and the conductivity of the N‐GA substrate can be controlled by varying the pyrolysis *** experiments reveal revealed that 10 wt%Ru‐NCs/N‐GA nanocomposites require overpotentials of only 52.and 36 mV to achieve a current density of 10 mA cm^(−2. in 1 mol/L HClO4 and 1 mol/L KOH electrolytes for HER,respectively,which is comparable to 2. wt%Pt/C *** from the ultrafine size and uniform dispersion of the Ru‐NCs,the synergy between Ru and the highly conductive substrate,and the anchoring effect of the N atom,the Ru‐NCs/N‐GA nanocomposites exhibit excellent activity and durability in the pH‐universal HER,thereby opening a new avenue for the production of commercial HER electrocatalysts.

关键词： Water electrolysis Graphene aerogels Nitrogen doping Ruthenium nanocrystals Hydrogen evolution reaction

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Commissioning of laser electron gamma beamline SLEGS at SSRF

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Nuclear Science and Techniques 2022年第7期33卷 103-114页

作者： Hong-wei Wang Gong-Tao Fan Long-Xiang liu Hang-Hua Xu Wen-Qing Shen Yu-Gang Ma Hiroaki Utsunomiya Long-Long Song Xi-Guang {2. Zi-Rui Hao Kai-Jie Chen Sheng Jin Yu-Xuan Yang Xin-Rong Hu Xin-Xiang li Pan Kuang Shanghai Advanced Research institute Chinese Academy of SciencesShanghai201210China Shanghai institute of applied Physics Chinese Academy of SciencesShanghai201800China University of chinese academy of Science Beijing100049China Fudan University Shanghai200433China Department of Physics Konan UniversityKobe658-8501Japan ShanghaiTech University Shanghai201210China Zhengzhou University Zhengzhou450001China

The Shanghai Laser Electron Gamma Source(SLEGS)is a powerful gamma source that provides MeV gamma-ray beams for nuclear science and *** was developed as one of the 16 beamline stations in the Phase Ⅱ Project of the Shanghai Synchrotron Radiation *** slant-scattering mode is for the first time systematically employed in laser Compton scattering at SLEGS to produce energy-tunable quasi-monoenergetic gamma-ray *** SLEGS officially completed its commissioning from July to December *** rays in the energy range of 0.2.-2..7 MeV with a flux of 2.1×10^(4)-1.2.10^(7) photons/s and an energy spread of 2.15% were produced during the *** paper reports the results from commissioning the SLEGS beamline.

关键词： SLEGS Laser Compton scattering Slant-scattering mode Backscattering mode

Toplayer-dependent crystallographic orientation imaging in the bilayer two-dimensional materials with transverse shear microscopy

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Frontiers of physics 2021年第5期16卷 165-172页

作者： Sabir Hussain Rui Xu Kunqi Xu Le Lei Shuya Xing Jianfeng Guo Haoyu Dong Adeel liaqat Rashid Iqbal Muhammad Ahsan Iqbal Shangzhi Gu Feiyue cao Yan Jun li Yasuhiro Sugawara Fei Pang wei Ji liming Xie Shanshan Chen Zhihai Cheng beijing Key Laboratory of Optoelectronic Functional Materials&Micro-nano Devices Department of PhysicsRenmin University of ChinaBeijing100872China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China Key Laboratory of Inorganic Functional Materials and Devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China University of chinese academy of sciences Beijing100039China Department of applied Physics Graduate School of EngineeringOsaka University2-1 YamadaokaSuitaOsaka565-0871Japan

Nanocontact properties of two-dimensional(2.)materials are closely dependent on their unique nanomechanical systems,such as the number of atomic layers and the supporting ***,we report a direct observation of toplayer-dependent crystallographic orientation imaging of 2. materials with the transverse shear microscopy(TSM).Three typical nanomechanical systems,MoS_(2. on the amorphous SiO_(2./Si,graphene on the amorphous SiO_(2./Si,and MoS_(2. on the crystallized Al_(2.O_(3),have been investigated in *** experimental observation reveals that puckering behaviour mainly occurs on the top layer of 2. materials,which is attributed to its direct contact adhesion with the AFM ***,the result of crystallographic orientation imaging of MoS_(2./SiO_(2./Si and MoS_(2./Al_(2.O_(3) indicated that the underlying crystalline substrates almost do not contribute to the puckering effect of 2. *** work directly revealed the top layer dependent puckering properties of 2. material,and demonstrate the general applications of TSM in the bilayer 2. systems.

关键词： 2. materials toplayer-dependent crystallographic orientation imaging nanomechanical contact properties transverse shear microscopy

Measurement of Br(n,γ)cross sections up to stellar s-process temperatures at the CSNS Back‑n

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Nuclear Science and Techniques 2023年第11期34卷 226-241页

作者： Gao‑Le Yang Zhen‑Dong An wei Jiang Xian‑Kai li wei‑wei Qiu Zheng‑Fa liao Zi‑Yue Zhuang Xiao‑Ping Zhang Sheng‑li Chen Chen‑Chen Guo Er‑Xi Xiao Xiao Fang Xin‑Xiang li Xin‑Rong Hu Bing Jiang Jin‑Cheng Wang Jie Ren Wen Luo Zhi‑Chao Zhu Hao‑Yang Lan Zong‑wei cao Xu Ma Ying‑Du liu Pu‑Sen Wang Yi Yang Ping Su Xian‑Gai Deng Wan‑Bing He Chun‑Wang Ma Yu‑Ting Wang Zhi‑Tao Dai Peng‑Qin He Ren‑Guang Tang Tao Zhou Jing Wang Han Yi Yue Zhang Yong‑Hao Chen Rui‑Rui Fan Ke‑Qing Gao Qiang li Kang Sun Zhi‑Xin Tan Min‑Hao Gu Han‑Tao Jing Jing‑Yu Tang School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China Shanghai institute of applied Physics Chinese Academy of SciencesShanghai 201800China State Key Laboratory of Lunar and Planetary sciences Macao University of Science and TechnologyMacao 999078China CNSA Macao Center for Space Exploration and Science Macao 999078China institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China School of Nuclear Science and Technology University of South ChinaHengyang 421001China Sino‑French institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China University of chinese academy of sciences Beijing 100049China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411100China Key Laboratory of Nuclear Physics and Ion‑beam Application(MOE) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghai 200433China institute of Particle and Nuclear Physics Henan Normal UniversityXinxiang 453007China School of Physics Henan Normal UniversityXinxiang 453007China Shenzhen Center Cancer hospitalChinese Academy of Medical SciencesShenzhen 518100China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China

The neutron capture cross sections(n,γ)of bromine were obtained using the time-of-flight technique at the Back-n facility of the China Spallation Neutron ***γ-rays originating from neutron-induced capture events were detected using four C_(6)D_(6) *** pulse-height {2.ghting technique and double-bunch unfolding method based on Bayesian theory were used in the data *** deductions,normalization,and corrections were carefully considered to obtain reliable measurement *** multilevel R-matrix Bayesian code SAMMY was used to extract the resonance parameters in the resolved resonance region(RRR).The average cross sections in the unresolved resonance region(URR)were obtained from 10 to 400 *** experimental results were compared with data from several evaluated libraries and previous experi-ments in the RRR and *** TALYS code was used to describe the average cross sections in the *** astrophysical Maxwell average cross sections(MACSs)of ^(79,81)Br from kT=5 to 100 keV were calculated over a sufficiently wide range of neutron *** a thermal energy of kT=30 keV,the MACS value for ^(79)Br 682.68 mb was in good agreement with the KADoNiS v1.0 recommended *** contrast,the value of 2.3±2. mb for ^(81)Br was substantially higher than that of the evaluated database and the KADoNiS v1.0 recommended value.

关键词： Time-of-flight technique Neutron capture cross sections Maxwell average cross sections

Establishment and industrial practice of high-temperature process evaluation system in sintering

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Journal of Iron and Steel Research International 2018年第9期25卷 910-922页

作者： Yuan-dong Pei Sheng-li Wu Xiao-jing Shao Zhi-xing Zhao Gang An Ze-jun Ma wei-dong Zhang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083 China Shougang Research institute of Technology Beijing 100043China beijing Key Laboratory of Green Recyclable Process for Iron and Steel Production Technology Beijing 100043 China Shougang Jingtang Integrated Iron and Steel Co. Ltd.Tangshan 063200 Hebei China

The behaviors of typical iron ores at high temperature were observed by confocal scanning laser microscopy. Four critical temperature points and liquid flow velocity at high temperatures of iron ores were obtained and the temperature points contain temperature at which sample starts to shrink, temperature at which the initial liquid phase forms, temperature at which a lot of liquid forms and temperature at which liquid consolidation ends. Under the same cao to Fe2.3 ratio, the liquid phase fluidity of iron ore fines of Carajas （IOC） is good. However, under the same basicity, as the content of SiO2.in IOC is low, the liquid phase fluidity of IOC is much smaller than that of Yandi fine. After analysis of the initial formation and development of the liquid phase and the final consolidation process, the high-temperature process evaluation system （HTPES for short） of iron ore was established. The idea of ＂dense ore matching fusible ore＂ instead of ＂relatively fusible ore＂ was proposed based on the results of HTPES and applied in ore matching of a sinter plant from Shougang Jingtang. The use of IOC （13-18%） instead of standard sintering fines （SSF） improved liquid phase fluidity and ensured the sinter quality. Furthermore, the use of IOC fine （18-2.%） with Hainan fine （0-2.） instead of SSF, a mixture of hematite and Marra Mamba ore and concentrates guaranteed the quality of sinter ore through improving fluidity, in the meantime reducing ore matching costs. With the establishment and application of HTPES, the sinter plant has achieved good economic benefits under the premise of ensuring the quality of sinter ore.

关键词： Sinter Iron ore In situ observation Fluidity Evaluation Industrial practice

Measurement of the ^(2.2.Th(n,f)cross section in the 1-2.0 MeV range at the CSNS Back-n

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Nuclear Science and Techniques 2023年第8期34卷 142-153页

作者： Zhi-Zhou Ren Yi-wei Yang Yong-Hao Chen Rong liu Bang-Jiao Ye Jie Wen Hai-Rui Guo Zi-Jie Han Qi-Ping Chen Zhong-wei Wen wei-li Sun Han Yi Xing-Yan liu Tao Ye Jiang-Bo Bai Qi An Jie Bao Yu Bao Ping cao Hao-Lei Chen Zhen Chen Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing Gao Xiao-Long Gao Min-Hao Gu Chang-Cai Han Guo-Zhu He Yong-Cheng He Yang Hong Yi-wei Hu Han-Xiong Huang Xi-Ru Huang Hao-Yu Jiang wei Jiang Zhi-Jie Jiang Han-Tao Jing ling Kang Bo li Chao li Jia-Wen li Qiang li Xiao li Yang li Jie liu Shu-Bin liu Ze Long Guang-Yuan Luan Chang-Jun Ning Meng-Chen Niu Bin-Bin Qi Jie Ren Xi-Chao Ruan Zhao-Hui Song Kang Sun Zhi-Jia Sun Zhi-Xin Tan Jing-Yu Tang Xin-Yi Tang Bin-Bin Tian li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Xiao-Guang Wu Xuan Wu li-Kun Xie Xiao-Yun Yang li Yu Tao Yu Yong-Ji Yu Guo-Hui Zhang lin-Hao Zhang Qi-wei Zhang Xian-Peng Zhang Yu-liang Zhang Zhi-Yong Zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Department of Modern Physics University of Science and Technology of ChinaHefei 230026China institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China institute of applied Physics and Computational {2. Beijing 100088China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230027China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina Northwest institute of Nuclear Technology Xi’an 710024China University of chinese academy of sciences Beijing 100049China Department of Engineering and applied Physics University of Science and Technology of ChinaHefei 230026China

The ^(2.2.Th(n,f)cross section is very important in basic nuclear physics and applications based on the Th/U fuel *** the time-of-flight method and a multi-cell fast-fission ionization chamber,a novel measurement of the^(2.2.Th(n,f)cross sec-tion relative to^(2.5)U in the 1–2.0 MeV range was performed at the China Spallation Neutron Source Back-n white neutron source(Back-n).The fission event-neutron energy spectra of^(2.2.Th and^(2.5)U fission cells were measured in the single-bunch *** 2.2.h/2.5U fission cross-sectional ratios were obtained,and the measurement uncertainties were 2.5–3.7%for energies in the 2.2. MeV range and 3.6–6.2.for energies in the 2.–2.0 MeV ***^(2.2.Th(n,f)cross section was obtained by introducing the standard cross section of^(2.5)U(n,f).The results were compared with those of previous theoreti-cal calculations,measurements,and *** measured 2.2.h fission cross section agreed with the main evaluation results in terms of the experimental uncertainty,and 2.2.h fission resonances were observed in the 1–3 MeV *** present results provide^(2.2.Th(n,f)cross-sectional data for the evaluation and design of Th/U cycle nuclear systems.

关键词： 2.2.h(n f)cross section Fast-fission ionization chamber Back-n white neutron source