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Review on regulation of MnS in non-qquenched and tempered steel

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Journal of Iron and Steel Research International 2024年第4期31卷 779-789页

作者： Guo-xing Qiu qing Du Feng Lu De-jun Miao yong-kun yang Xiao-ming Li School of Metallurgical Engineering Xi'an University of Architecture and TechnologyXi'an 710055ShaanxiChina Laigang Technique Center Shandong Iron and Steel Group Co.Ltd.Jinan 271104ShandongChina

An overview of the current research status and control methods of MnS in non-quenched and tempered steel was *** a low-melting plastic inclusion,the morphology and distribution of MnS were influenced by various production ***,control of MnS is a systematic problem that must be integrated into the entire production *** on the production process,the factors affecting the morphology and distribution of MnS in steel were *** effects of oxygen activity,manganese,sulfur,and some alloys on MnS inclusion precipitation were summarized,mainly including MnS modification treatment and oxygen-sulfide composite precipitation *** is believed that MnS precipitates during the solidification process of steel,and controlling the solidification cooling rate could effectively regulate the size and morphology of MnS,avoiding the precipitation of ***,by changing the deformation rate,deformation amount,deformation temperature during the hot deformation process,and heating time and temperature during heat treatment,the distribution and morphology of MnS could be *** the fine control of the above process parameters,the number of II-MnS in steel could be effectively reduced,and their morphology could be improved,thereby enhancing the performance of non-quenched and tempered steel and promoting its wider ***,applying laboratory research results to industrial production is an important direction for future research efforts in this field.

关键词： MnS Non-quenched and tempered steel Control technology Process parameter Morphology Distribution

Variation Characteristics of Hydrothermal Resources Effectiveness Under the Background of Climate Change in Southern Rice Production Area of China

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Journal of Integrative Agriculture 2013年第12期12卷 2260-2279页

作者： YE qing yang Xiao-guang DAI Shu-wei LI yong GUO Jian-ping College of Resources and Environmental Science China Agricultural University Forestry Institute Jiangxi Agricultural University School of Natural Resources University of Nebraska-Lincoln Guizhou Key Laboratory of Mountainous Climate and Resources Chinese Academy of Meteorological Sciences

The spatiotemporal characteristics of hydrothermal resources in southern rice production area of China have changed under the background of climate change,and this change would affect the effectiveness of hydrothermal resources during local rice growing *** to the cropping system subdivision in southern rice production area of China during 1980s,this study used climate data from 254 meteorological stations and phonological data from 168 agricultural observation stations in the south of China,and adopted 6 international evaluation indices about the effectiveness of hydrothermal resources to analyze the temporal and spatial characteristics of hydrothermal resources during the growing period of single cropping rice system and double cropping rice system for 16 planting zones in the whole study *** results showed that：in southern rice production area of China,the effectiveness of thermal resources of single cropping rice area（SCRA） was less than that of double cropping rice area（DCRA）,whereas the effectiveness of thermal resources of both SARA and DCRA showed a decreasing *** index value of effective precipitation satisfaction of SCRA was higher than that of DCRA,nevertheless the index value of effective precipitation satisfaction of both SCRA and DCRA showed a decreasing *** was a significant linear relationship between effective thermal resource and water demand,likely water demand increased by 18 mm with every 100°C d increase of effective *** precipitation satisfaction index（EPSI） showed a negative correlation with effective heat,yet showed a positive correlation with effective *** reduced by 1% when effective heat resource increased by 125°C *** study could provide insights for policy makers,land managers or farmers to improve water and heat resource uses and rationally arrange rice production activities under global climate change condition.

关键词： climate change rice production area effectiveness of hydrothermal resources spatiotemporal characteristics

Screening of aptamers and their potential application in targeted diagnosis and therapy of liver cancer

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World Journal of Gastroenterology 2019年第26期25卷 3359-3369页

作者： Guo-qing Zhang Li-Ping Zhong Nuo yang yong-Xiang Zhao National Center for International Research of Biological Targeting Diagnosis and Therapy Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy Guangxi Medical University

Aptamers are a class of single oligonucleotide molecules(DNA or RNA)that are screened from random DNA or RNA oligonucleotide chain libraries by the systemic evolution of ligands by exponential enrichment *** selected aptamers are capable of specifically binding to different targeting molecules,which is achieved by the three-dimensional structure of *** are similar in function to monoclonal antibodies,and therefore,they are also referred to as"chemical antibodies".Due to their high affinity and specificity and low immunogenicity,aptamers are topics of intense interest in today's biological targeting research especially in tumor *** not only have high potential for clinical advances in tumor targeting detection but also are highly promising as targeted tumor drug carriers for use in tumor *** experimental studies have shown that aptamer-based diagnostic and therapeutic methods for liver cancer have great potential for *** paper summarizes the structure,characteristics,and screening methods of aptamers and reviews the recent research progress on nucleic acid aptamers in the targeted diagnosis and treatment of liver cancer.

关键词： Aptamer Systemic evolution of ligands by exponential enrichment Liver cancer Outlook

Three-dimensional antimony sulfide anode with carbon nanotube interphase modified for lithium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2021年第10期28卷 1629-1635页

作者： Qi Wang Yue-yong Du Yan-qing Lai Fang-yang Liu Liang-xing Jiang Ming Jia School of Metallurgy and Environment Central South UniversityChangsha 410083China

Antimony sulfide(Sb_(2)S_(3))is a promising anode for lithium-ion batteries due to its high capacity and vast ***,the low electronic conductivity and severe volume change during cycling hinder its *** our work,a three-dimensional(3D)Sb_(2)S_(3) thin film anode was fabricated via a simple vapor transport deposition system by using natural stibnite as raw material and stainless steel fiber-foil(SSF)as 3D current collector,and a carbon nanotube interphase was introduced onto the film surface by a simple dropping-heating process to promote the electrochemical *** 3D structure can greatly improve the initial coulombic efficiency to a record of 86.6% and high reversible rate capacity of 760.8 mAh·g^(-1) at 10 *** carbon nanotubes interphase modified,the Sb_(2)S_(3) anode cycled extremely stable with high capacity retention of 94.7% after 160 *** work sheds light on the economical preparation and performance optimization of Sb_(2)S_(3)-based anodes.

关键词： three dimensions antimony sulfide anode carbon nanotubes interphase lithium-ion batteries

Organic geochemical characteristics and significance of Permian Gufeng formation siliceous shale in well CSDP-2 of South Yellow Sea central uplift

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Acta Geochimica 2023年第4期42卷 765-778页

作者： Jian-ming Gong qing-song Cheng Chuan-sheng yang Jian-qiang Wang yong Yuan qingdao Institute of Marine Geology Qingdao 266071ShandongChina PetroChina Zhejiang Oilfield Company Hangzhou 310023ZhejiangChina

In order to understand the hydrocarbon generation potential of the siliceous shale in the Permian Gufeng Formation of the South Yellow Sea,the organic geochemistry and organic petrology of the siliceous shale in the Gufeng Formation of the CSDP-2 well were studied and *** is found that the TOC of the samples is mainly between 9%and 12%,and Tmaxis mainly distributed between 510 and 540℃.The value of the organic microscopic type index(TI)is between 25.71 and 31.00,which is a set of II_(2)high-quality source rocks with high organic matter abundance in the over mature stage of largescale gas *** to the distribution characteristics of Molecular fossils in siliceous shale of Gufeng Formation of well CSDP-2,bacterial organic matter is the main hydrocarbon generating parent material,and aquatic animal organic matter is an important hydrocarbon generating parent *** siliceous shale in Gufeng Formation of CSDP-2 well is in the stage of large-scale gas generation;Therefore,the Gufeng Formation in the central uplift of the South Yellow Sea has the material basis for the formation of large-scale shale gas *** the same time,the siliceous metasomatism of the siliceous shale reservoir of Gufeng Formation is not conducive to the primary migration of oil,and there is much oil and gas remaining in the reservoir.

关键词： South Yellow Sea Basin Gufeng formation Source rock Molecular geochemistry Shale gas

Biogenic volatile organic compounds dominated the near-surface ozone generation in Sichuan Basin,China,during fall and wintertime

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Journal of Environmental Sciences 2024年第7期141卷 215-224页

作者： Dasheng Huang qing Li Yan Han Shi-yong Xia Jiawei Zhou Hanxiong Che Keding Lu Fumo yang Xin Long yang Chen Research Center for Atmospheric Environment Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China College of Resources and Environment Chongqing SchoolUniversity of the Chinese Academy of Sciences(UCAS Chongqing)Chongqing 400714China College of Environmental and Chemical Engineering Chongqing Three Gorges UniversityChongqing 404199China Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and EnergyPeking University Shenzhen Graduate SchoolLishui RoadNanshan DistrictShenzhen 518055China SKL-ESPC and BIC-ESAT College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China College of Architecture&Environment Sichuan UniversityChengdu 610065China

The complex air pollution driven by both Ozone(O_(3))and fine particulate matter(PM2.5)sig nificantly influences the air quality in the Sichuan Basin(SCB).Understanding the O_(3)for mation during autumn and winter is necessary to understand the atmospheric oxidative ***,continuous in-site field observations were carried out during the late summer,early autumn and winter of 2020 in a rural area of *** total volatile organic compounds(VOCs)concentration reported by a Proton-Transfer-Reaction Time-of Flight Mass Spectrometry(PTR-ToF-MS)were 13.66±9.75 ppb,5.50±2.64 ppb,and 9.41±5.11 ppb in late summer,early autumn and winter,*** anthropogenic VOCs(AVOCs)and biogenic VOCs(BVOCs)were 8.48±7.92 ppb and 5.18±2.99 ppb in late sum mer,3.31±1.89 ppb and 2.19±0.93 ppb in autumn,and 6.22±3.99 ppb and 3.20±1.27ppb in winter.A zero-dimensional atmospheric box model was employed to investigate the sensitivity of O_(3)-precursors by relative incremental reactivity(RIR).The RIR values of AV OCs,BVOCs,carbon monoxide(CO),and nitrogen oxides(NOx)were 0.31,0.71,0.09,and-0.36 for late summer,0.24,0.59,0.22,and-0.38 for early autumn,and 0.30,0.64,0.33 and-0.70 for winter,and the results showed that the O_(3)formation of sampling area was in the VOC-limited region,and O_(3)was most sensitive to BVOCs(with highest RIR values,>0.6)This study can be helpful in understanding O_(3)formation and interpreting the secondary formation of aerosols in the winter.

关键词： VOCs PTR-MS Model Ozone

ABS材料基于ANSYS生死单元技术的热分析

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合成材料老化与应用 2017年第2期46卷 41-45页

作者：王靖李自良祁冬杰李永青杨东方曹华昆明理工大学机电工程学院云南昆明650500

熔融沉积成型(FDM)是瞬态非线性的,存在温度在时间和空间的不断变化。成型过程的热分析,是对应力变化,以及翘曲变形等的重要参考。该文通过有限元分析方法中的生死单元技术,使用APDL语言编写程序来进行温度场的模拟,发现温度场的变化规... 详细信息

熔融沉积成型(FDM)是瞬态非线性的,存在温度在时间和空间的不断变化。成型过程的热分析,是对应力变化,以及翘曲变形等的重要参考。该文通过有限元分析方法中的生死单元技术,使用APDL语言编写程序来进行温度场的模拟,发现温度场的变化规律,以及其与应力场和翘曲变形等的关联。

关键词： FDM 生死单元 APDL 温度场

Development and validation of depletion code system IMPC Burnup for ADS

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Nuclear Science and Techniques 2019年第3期30卷 65-74页

作者： Zhao-qing Liu Ze-Long Zhao yong-Wei yang Yu-Cui Gao Hai-Yan Meng qing-Yu Gao Institute of Modern Physics Chinese Academy of Sciences School of Nuclear Science and Technology University of Chinese Academy of Sciences

Depletion calculation is important for studying the transmutation efficiency of minor actinides and longlife fission products in accelerator-driven subcritical reactor system(ADS). Herein the Python language is used to develop a burnup code system called IMPC-Burnup by coupling FLUKA, OpenMC, and ORIGEN2. The program is preliminarily verified by OECD-NEA pin cell and IAEAADS benchmarking by comparison with experimental values and calculated results from other studies. Moreover,the physics design scheme of the CIADS subcritical core is utilized to test the feasibility of IMPC-Burnup program in the burnup calculation of ADS system. Reference results are given by the COUPLE3.0 program. The results of IMPC-Burnup show good agreement with those of COUPLE3.0. In addition, since the upper limit of the neutron transport energy for OpenMC is 20 MeV, neutrons with energies greater than 20 MeV in the CIADS subcritical core cannot be transported; thus, an equivalent flux method has been proposed to consider neutrons above 20 MeV in the OpenMC transport calculation. The results are compared to those that do not include neutrons greater than 20 MeV. The conclusion is that the accuracy of the actinide nuclide mass in the burnup calculation is improved when the equivalent flux method is used. Therefore, the IMPC-Burnup code is suitable for burnup analysis of the ADS system.

关键词： ADS-coupled proton-neutron transport Burnup calculation IMPC-Burnup FLUKA OpenMC ORIGEN2

New chaos M-ary modulation method and its application in communications

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The Journal of China Universities of Posts and Telecommunications 2011年第1期18卷 77-83页

作者： FU yong-qing ZHANG Fang College of Information and Communication Engineering Harbin Engineering University Harbin 150001 China

At present, chaotic communications have been widely studied. However, these researches mainly focus on the binary systems while the researches of M-ary chaotic communications are not extensive. To change the situation, a chaos M-ary modulation method based on phase plane partition of Hamilton map is proposed. Firstly, the chaotic model of Hamilton map and its phase plane features are described, and then the way of creating the chaos M-ary modulation is discussed. Next, to evaluate the proposed method, the system simulation results and analysis are given. Finally, the chaos M-ary modulation method is applied to communications.

关键词： chaos M-ary modulation Hamilton map initial value mapping method phase plane partition