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Al、N含量对齿轮钢奥氏体晶粒度的影响

金属热处理 2024年第7期49卷 113-120页

作者：郭涛岁月何肖飞薛彦均黄峰武汉科技大学省部共建耐火材料与冶金国家重点实验室湖北武汉430081 钢铁研究总院有限公司特殊钢研究院北京100081 陆装驻十堰地区军事代表室湖北十堰442000

试验研究了两种Al、N含量的齿轮钢在980、1050和1100℃奥氏体化后的奥氏体晶粒长大行为,通过试验和模型计算,采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)和碳膜复型等技术探究AlN析出相的平衡溶解规律及其对奥氏体晶粒度的影响... 详细信息

试验研究了两种Al、N含量的齿轮钢在980、1050和1100℃奥氏体化后的奥氏体晶粒长大行为,通过试验和模型计算,采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)和碳膜复型等技术探究AlN析出相的平衡溶解规律及其对奥氏体晶粒度的影响。结果表明,随着Al、N含量的提高,齿轮钢中奥氏体晶粒异常长大的临界温度也随之升高,在Al含量0.03.%、N含量0.019%下,试验钢奥氏体化温度可以提高到1050℃,且保温6 h后,奥氏体晶粒仍然细小均匀,晶粒度级别在7.5~8级;通过对AlN析出相的分析发现,随着奥氏体化温度的提高,AlN析出相由多边形和近球形向长棒状转变,且尺寸不断变大,AlN析出相等效半径大于3. nm以上时,将会导致AlN析出相无法钉扎奥氏体晶界,产生混晶;由于AlN析出相的粗化与回溶,使得奥氏体的极限晶粒尺寸增长速度越来越快,奥氏体晶粒异常长大的极限钉扎力在0.045~0.095 J/cm^(3.之间。

关键词：齿轮钢晶粒长大混晶 AlN析出相

Two-dimensional materials for future information technology: status and prospects

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Science china(Information Sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi ZHANG Mingsheng XU Peifeng LI taotao LI Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG Xidong DUAN Yuhan FENG Yu FU Jingshu guo Pengwen guo yue HAO Jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMRAN Ziqiang KONG Jia LI Qian LI Weisheng LI Lei LIAO Bilu LIU Can LIU Chunsen LIU Guanyu LIU Kaihui LIU Liwei LIU Sheng LIU Yuan LIU Donglin LU Likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-Ling REN Haowen SHU Litao SUN yue SUN Quanyang tao Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... School of Electronic Science and Engineering Nanjing University School of Integrated Circuits Interdisciplinary Research Center for Future Intelligent Chips (Chip-X)Nanjing University School of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications state key laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences School of Physics and key Lab of Quantum Materials and Devices of the Ministry of Education School of Electronic Science & EngineeringSoutheast University College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University Suzhou laboratory state key laboratory of Integrated Chips and Systems School of MicroelectronicsFudan University Shaoxin laboratory Department of Applied Physics The Hong Kong Polytechnic University key laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University state key laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National key laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS key laboratory of Nanophotonic Materials and Devices & key laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical Engineering Hunan University key laboratory of Quantum state Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China School

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3. integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronic devices optoelectronic devices multi-functional integration

Formation,evolution,reconstruction of black shales and their influence on shale oil and gas resource

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china Geology 2024年第3期7卷 551-585页

作者： Shi-zhen Li Qiu-chen Xu Mu Liu guo-heng Liu Yi-fan Li Wen-yang Wang Xiao-guang Yang Wei-bin Liu Yan-fei An Peng Sun tao Liu Jiang-hui Ding Qian-chao Li Chao-gang Fang state key laboratory of Continental Shale Oil Beijing 100083China The key laboratory of Unconventional Oil and Gas Geology China Geological SurveyBeijing 100083China Oil and Gas Survey China Geological SurveyMinistry of Natural ResourcesBeijing 100083China state key laboratory of Lithospheric and Environmental Coevolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Geosciences China University of Petroleum(East China)Qingdao 266580China School of Energy resources China University of Geosciences(Beijing)Beijing 100083China key laboratory of petroleum {3.s Research Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of resource and Environment Engineering Anhui UniversityHefei 230601China Yangtze university Wuhan 430100China Nanjing Center China Geological SurveyNanjing 210016China National Elite Institute of Engineering CNPCBeijing 100096China

Black shales are important products of material cycling and energy exchange among the lithosphere,atmosphere,hydrosphere,and *** are widely distributed throughout geological history and provide essential energy and mineral resources for the development of human *** also record the evolution process of the earth and improve the understanding of the *** review focuses on the diagenesis and formation mechanisms of black shales sedimentation,composition,evolution,and reconstruction,which have had a significant impact on the formation and enrichment of shale oil and *** terms of sedimentary environment,black shales can be classified into three types:Marine,terrestrial,and marine-terrestrial transitional *** formation processes include mechanisms such as eolian input,hypopycnal flow,gravity-driven and offshore bottom *** a geological perspective,the formation of black shales is often closely related to global or regional major geological *** enrichment of organic matter is generally the result of the interaction and coupling of several factors such as primary productivity,water redox condition,and sedimentation *** terms of evolution,black shales have undergone diagenetic evolution of inorganic minerals,thermal evolution of organic matter and hydrocarbon generation,interactions between organic matter and inorganic minerals,and pore *** terms of reconstruction,the effects of fold deformation,uplift and erosion,and fracturing have changed the stress state of black shale reservoirs,thereby having a significant impact on the pore *** activity promotes the formation of veins,and have changed the material composition,stress structure,and reservoir properties of black *** resource effects,the deposition of black shales is fundamental for shale oil and gas resources,the evolution of black shales promotes the shale oil and gas formation and storage,and the reconstruction of black shales wou

关键词： Black shales Shale oil and gas resource effects Sedimentary environment Sedimentary process Organic matter accumulation Diagenetic evolution Thermal evolution Organic matter and inorganic minerals Tectonic reconstruction Oil and gas exploration engineering Veins Fluid activity

High-quality genome assemblies for two Australimusa bananas(Musa spp.)and insights into regulatory mechanisms of superior fiber properties

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Plant Communications 2024年第1期5卷 245-261页

作者： Run Zhou Shuo Wang Ni Zhan Weidi He Guiming Deng Tongxin Dou Xi-Tong Zhu Wen-Zhao Xie Yu-Yu Zheng Chunhua Hu Fangcheng Bi Huijun Gao tao Dong Siwen Liu Chunyu Li Qiaosong Yang Lingqiang Wang Jia-Ming Song Jiangbo Dang Qigao guo Ganjun Yi Ling-Ling Chen Ou Sheng Institute of Fruit Tree Research Guangdong Academy of Agricultural SciencesKey Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of Agriculture and Rural AffairsGuangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree ResearchGuangzhou 510640China College of Informatics Huazhong Agricultural UniversityWuhan 430070China state key laboratory for Conservation and Utilization of Subtropical Agro-bio{3.s College of Life Science and TechnologyGuangxi UniversityNanning 530004China College of Horticulture and Landscape Architecture Southwest UniversityChongqing 400715China

Bananas(Musa spp.)are monocotyledonous plants with high genetic diversity in the Musaceae family that are cultivated mainly in tropical and subtropical *** fruits are a popular food,and the plants themselves have diverse *** genetic groups(genomes)are thought to have contributed to current banana cultivars:Musa acuminata(A genome),Musa balbisiana(B genome),Musa schizocarpa(S genome),and species of the Australimusa section(T genome).However,the T genome has not been effectively ***,we present the high-quality TT genomes of two representative accessions,Abaca(Musa textilis),with high-quality naturalfiber,and Utafun(Musa troglodytarum,Fe’i group),with abundant *** the Abaca and Utafun assemblies comprise 10 pseudochromosomes,and their total genome sizes are 613.Mb and 619 Mb,*** genome analysis revealed that the larger size of the T genome is likely attributable to rapid expansion and slow removal of *** with those of Musa AA or BB accessions or sisal(Agava sisalana),Abacafibers exhibit superior mechanical properties,mainly because of their thicker cell walls with a higher content of cellulose,lignin,and *** of MusaCesA cellulose synthesis genes peaks earlier in Abaca than in AA or BB accessions during plant development,potentially leading to earlier cellulose accumulation during secondary cell wall *** Abaca-specific expressed gene MusaMYB26,which is directly regulated by MusaMYB61,may be an important regulator that promotes precocious expression of secondary cell wall ***,MusaWRKY2 and MusaNAC68,which appear to be involved in regulating expression of MusaLAC and MusaCAD,may at least partially explain the high accumulation of lignin in *** work contributes to a better understanding of banana domestica-tion and the diverse genetic resources in the Musaceae family,thus providing resources for Musa genetic improvement.

关键词： Australimusa bananas T genome Musaceae evolution structural variations fiber

Two haplotype-resolved genome assemblies for AAB allotriploid bananas provide insights into banana subgenome asymmetric evolution and Fusarium wilt control

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Plant Communications 2024年第2期5卷 243-260页

作者： Wen-Zhao Xie Yu-Yu Zheng Weidi He Fangcheng Bi Yaoyao Li Tongxin Dou Run Zhou Yi-Xiong guo Guiming Deng Wenhui Zhang Min-Hui Yuan Pablo Sanz-Jimenez Xi-Tong Zhu Xin-Dong Xu Zu-Wen Zhou Zhi-Wei Zhou Jia-Wu Feng Siwen Liu Chunyu Li Qiaosong Yang Chunhua Hu Huijun Gao tao Dong Jiangbo Dang Qigao guo Wenguo Cai Jianwei Zhang Ganjun Yi Jia-Ming Song Ou Sheng Ling-Ling Chen Institute of Fruit Tree Research Guangdong Academy of Agricultural SciencesKey Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of Agriculture and Rural AffairsGuangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree ResearchGuangzhou 510640China College of Informatics Huazhong Agricultural UniversityWuhan 430070China state key laboratory for Conservation and Utilization of Subtropical Agro-bio{3.s College of Life Science and TechnologyGuangxi UniversityNanning 530004China College of Horticulture and Landscape Architecture Southwest UniversityChongqing 400715China

Bananas(Musa spp.)are one of the world’s most important fruit crops and play a vital role in food security for many developing *** banana cultivars are triploids derived from inter-and intraspecific hybrid-izations between the wild diploid ancestor species Musa acuminate(AA)and ***(BB).We report two haplotype-resolved genome assemblies of the representative AAB-cultivated types,Plantain and Silk,and precisely characterize ancestral contributions by examining ancestry mosaics across the *** asymmetric evolution is observed in their subgenomes,which can be linked to frequent homol-ogous exchange *** reveal the genetic makeup of triploid banana cultivars and verify that subge-nome B is a rich source of disease resistance *** 58.5%and 59.4%of Plantain and Silk genes,respectively,are present in all three haplotypes,with>50%of genes being differentially expressed alleles in different *** observed that the number of upregulated genes in Plantain is significantly higher than that in Silk at one-week post-inoculation with Fusarium wilt tropical race 4(Foc TR4),which con-firms that Plantain can initiate defense responses faster than ***,we compared genomic and transcriptomic differences among the genes related to carotenoid synthesis and starch metabolism between Plantain and *** study provides resources for better understanding the genomic architecture of culti-vated bananas and has important implications for Musa genetics and breeding.

关键词： bananas Plantain Silk asymmetric evolution homologous exchange Fusarium wilt

LANDFORM MORPHOLOGIC RELATIONS BETWEEN INTER-GULLIED AND GULLIED LAND AREAS——A CASE STUDY OF THE WANGJIAGOU WATERSHED IN THE WEST OF SHANXI PROVINCE

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International Journal of Sediment Research 2006年第1期21卷 62-73页

作者： Hao CHEN1, Hai-yan FANG2, Qiang-guo CAI 3. Guang-lin LIANG4 and Zong-qi yue51Associate Professor, 2Doctor, 3.rofessor, 4Postgraduate for master, key {3. of Water Cycle and Related Land Surface Processes, Institute of Geographical Sciences and Natural resources Research, Chinese Academy of Sciences, beijing, 100101, china 1Professor, College of resource and Environment, Southwest Agricultural university, Chongqing, 400716, china 2 Doctor, 4 Postgraduate for master, Graduate university of Chinese Academy of Sciences, beijing, 100049, china 5 Associate Professor, Department of Civil Engineering, Hong Kong university, Hong Kong, china key laboratory of Water Cycle and Related Land Surface Processes Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Department of Civil Engineering Hong Kong University Hong Kong China

Previous studies on erosional relations between inter-gullied and gullied lands have mainly concentrated on exploration of water and sediment relations, with few quantitative studies of evolution relations between inter-gullied land and gullied landform erosion in small catchments. This paper, using information from a 1:5000 digital orthophotomap (DOM), digital elevation model (DEM), and topographic map of the same period and of the same scale, quantitatively analyzes the impact and interactions of inter-gullied and gullied land geomorphologic characteristics on the dissected extent of a catchment using orthogonal polynomial regression analysis. Results indicate that gullies play a leading role in the catchment morphologic evolution and extent of cracked ground surface. When inter-gullied land areas are the same, a 0.1 km2 gullied land area has the maximum effect on the erosive evolution intensity of the catchment cracked degree. The smaller the catchment area is, the greater the extent of cracked ground surface and gully intensity would be. The geomorphologic evolution mechanism of gullied catchments can be explained as a function of geomorphologic indicators of inter-gullied and gullied land characteristics.

关键词： Inter-gullied land erosion Gully erosion Small catchments Gullied land area Loess Plateau

热效应在电流驱动反铁磁/铁磁交换偏置场翻转中的显著作用

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物理学报 2024年第2期73卷 269-277页

作者：何宇陈伟斌洪宾黄文涛张昆陈磊冯学强李博刘菓孙笑寒赵萌张悦北京航空航天大学集成电路科学与工程学院费尔北京研究院空天信自旋电子技术工业和信息化部重点实验室北京100191 山东大学物理学院晶体材料国家重点实验室济南250100 北京航空航天大学合肥创新研究院合肥230012

电流驱动的面内交换偏置场翻转具有无需外磁场辅助、抗磁场干扰以及强磁各向异性等优势,受到广泛关注.然而,在纳米级厚度薄膜系统中,反铁磁/铁磁异质结的阻塞温度较低,同时电流脉冲会产生大量的焦耳热,理论上电流热效应对于交换偏置场... 详细信息

电流驱动的面内交换偏置场翻转具有无需外磁场辅助、抗磁场干扰以及强磁各向异性等优势,受到广泛关注.然而,在纳米级厚度薄膜系统中,反铁磁/铁磁异质结的阻塞温度较低,同时电流脉冲会产生大量的焦耳热,理论上电流热效应对于交换偏置场翻转有着显著作用,但是其作用机制缺乏相关研究和验证.我们制备了一系列反铁磁IrMn厚度不同的Pt/IrMn/Py异质结,系统性地研究了热效应在电流翻转交换偏置场中的作用机制.结果表明,在毫秒级电流脉冲下,焦耳热能够使得器件升温至阻塞温度以上,解除反铁磁/铁磁界面的交换耦合,同时电流产生的奥斯特场和自旋轨道矩能够翻转铁磁磁矩,在降温过程中完成交换偏置场的翻转.并且,在翻转过程中,反铁磁/铁磁异质结的各向异性磁阻曲线呈现与温度相关的两步磁化翻转现象,分析表明该现象起源于交换偏置耦合与铁磁直接交换作用之间的竞争关系.本文的研究结果厘清了热效应在电流驱动交换偏置场翻转过程中的重要作用,有助于推动基于电控交换偏置场的自旋电子器件发展.

关键词：交换偏置场反铁磁/铁磁热效应自旋轨道矩

Numerical Experiments of Pore Scale for Electrical Properties of Saturated Digital Rock

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International Journal of Geosciences 2011年第2期2卷 148-154页

作者： wenzheng yue guo {3. Xiaochuan Zheng Ning Luo state key laboratory of {3. resource and prospecting Key Laboratory of Earth Prospecting and Information Technology CNPC Key Lab of Well Logging China University of Petroleum Sichuan petroleum Administration Logging Company Ltd

The two dimensional Lattice Gas Automation (LGA) was applied to simulate the current flow in saturated digital rock for revealing the effects of micro structure and saturation on the electrical transport properties. The digital rock involved in this research can be constructed by the pile of matrix grain with radius obtained from the SEM images of rock sections. We further investigate the non-Archie phenomenon with the LGA and compare micro-scale numerical modeling with laboratory measurements. Based on results, a more general model has been developed for reservoir evaluation of saturation with higher accuracy in oilfield application. The calculations from the new equation show very good agreement with laboratory measurements and published data on sandstone samples.

关键词： Lattice Gas Automation Digital Rock Non-Archie Phenomenon Water Saturation

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矿井水反渗透系统阻垢剂成分与阻垢机制

工程科学学报 2024年第6期46卷 1004-1011页

作者：李曈徐梦兰赵悦任舒阳王霄郭开祥李从举国家能源集团煤炭开采水资源保护与利用国家重点实验室北京102209 北京科技大学能源与环境工程学院北京100083

矿井水反渗透浓水中阻垢剂可以抑制Ca^(2+)、Mg^(2+)结晶沉淀导致双碱法投药量高、除硬效果差,影响后续蒸发结晶分盐效果.探究反渗透系统中阻垢剂成分及阻垢机制是实现Ca^(2+)、Mg^(2+)脱稳、解决深度除硬与零排放问题的关键.本文首先... 详细信息

矿井水反渗透浓水中阻垢剂可以抑制Ca^(2+)、Mg^(2+)结晶沉淀导致双碱法投药量高、除硬效果差,影响后续蒸发结晶分盐效果.探究反渗透系统中阻垢剂成分及阻垢机制是实现Ca^(2+)、Mg^(2+)脱稳、解决深度除硬与零排放问题的关键.本文首先测定反渗透浓水水质条件,通过超滤分级、傅里叶红外光谱(FT-IR)、紫外可见吸收光谱(UV-Vis)和三维荧光光谱(EEM)分析得出溶解性有机物主要为分子量3.kDa且含有羧基、醇/酚羟基与不饱和烃结构的微生物代谢产物和类腐殖酸物质;根据13.和3.P核磁共振(NMR)谱化学位移特征(甲基碳、季碳和C—PO_(3.H_(2)结构),确定阻垢剂主要成分为羟基乙叉二膦酸(HEDP);吸附去除88.55%总磷和3..86%COD后,双碱滴定结果表明,Ca^(2+)沉淀完全所需CO^(2)_(-3.的投加量从2845.8减少至826.8 mg·L^(-1),表明HEDP主要阻止Ca^(2+)结晶成垢;重新利用HEDP复配,CO^(2)_(-3.投加量仅增加至1626.3.mg·L^(-1),说明吸附去除的部分有机物具有一定分散作用,可以抑制溶液中Ca^(2+)结晶团聚.HEDP与溶解性有机物的协同阻垢机制,为矿井水反渗透浓水中Ca^(2+)、Mg^(2+)深度去除提供重要理论依据和调控策略.

关键词：反渗透浓水阻垢剂羟基乙叉二膦酸核磁共振阻垢机制