检索结果-南通市图书馆

Model for RuhrstahI-Heraeus （RH） decarburization process

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2018年第4期25卷 409-416页

作者： dong-ping zhan Yang-peng zhang zhou-hua jiang hui-shu zhang School of Metallurgy Northeastern University Shenyang 110819 Liaoning China Shenyang Northeastern Institute of Metal Materials Co. Ltd. Shenyang 110108 Liaoning China School of Materials Science and Engineering Northeastern University Shenyang 110819 Liaoning China Metallurgical Engineering College Liaoning Institute of Science and Technology Benxi 117004 Liaoning China

A mathematical model was established to predict the carbon content of ultralow carbon steel in the Ruhrstahl-Heraeus （RH） process. The model was solved using the fourth-order Runge-Kutta method and assumed that the volume of steel partaking in the reaction depends on the decarburization mechanism. After analyzing the decarburization process using the proposed model, the following conclusions were drawn. First, the initial carbon and oxygen contents in the RH degasser should be stabilized in the range of （200-350） × 10^-6 and （500-700） × 10^-6, respectively. Second, in the initial stage, the pressure should be reduced as quickly as possible. Third, oxygen blowing should begin as early as possible when the forced decarburization is needed and the minimum oxygen flow rate should be 0.1923 m3/（t rain）. Finally, expanding the diameter of the snorkel tube from 480 to 600 mm clearly enhances the decarburization rate.

关键词： RH Model Carbon content Fourth-order Runge-Kutta Ultralow carbon steel Decarburization

Analysis of the anti-T2DM components in dichloromethane fraction of Schisandra sphenanthera and its mechanism

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Traditional Medicine Research 2025年第1期10卷 27-43页

作者： Shi-Bo Feng Hai-hui jiang hui-Li Kang Yi jiang hua-Wei zhang Xiao-Mei Song Yu-Ze Li Wen-Li huang dong-dong zhang Chong Deng School of Pharmacy Shaanxi University of Chinese MedicineXianyang 712046China School of Pharmacy and Shaanxi Qinling Application Development and Engineering Center of Chinese Herbal Medicine Shaanxi University of Chinese MedicineXianyang 712046China Key Laboratory for Research and Development of“Qin Medicine”of Shaanxi Administration of Traditional Chinese Medicine Xianyang 712046China Shaanxi Key Laboratory of Research and Application of“Taibai Qi Yao” Xianyang 712046China

Background:The type 2 diabetes mellitus(T2DM)pharmacodynamic study of various parts of Schisandra sphenanthera was conducted in the previous stage,and it was found that dichloromethane extracted part(SDP)had a significant hypoglycemic ***,the components of SDP were analyzed,and the specific mechanism of its anti-T2DM was ***:We used a high-fat,high-sugar diet in combination with streptozotocin to induce a T2DM rat model,and the model rats were divided into two groups according to body weight and blood ***,oral glucose tolerance test,fasting blood glucose,low density lipoprotein cholesterol,superoxide dismutase,insulin,glycated hemoglobin,total cholesterol,nonesterified free fatty acids,alanine aminotransferase,high-density lipoprotein cholesterol,aspartate aminotransferase,malondialdehyde,and glutathione peroxidase were measured,organ indices were calculated,and pathological sections of pancreas and liver were *** 16S rRNA V3–V4 region of intestinal flora was sequenced to explore the effect of SDP on biochemical indicators and intestinal *** on the above indicators,the anti-T2DM mechanism of SDP in Schisandra sphenanthera was ***:After six weeks of administration,the biochemical indices of diabetic rats were diminished compared to the control *** SDP could significantly increase the gut microbialα-diversity index,resulting in significant changes in the flora of T2DM rats,with increased richness and diversity,reduced harmful flora,and significantly back-regulated the levels of acetic acid,propionic acid,and butyric ***:SDP can improve the symptoms associated with elevated blood glucose,dyslipidemia,elevated fasting insulin levels,and damaged glucose tolerance in *** against T2DM may be through the control of intestinal flora to normalize and exert anti-diabetic effect;its main active components may be lignans and terpenoids.

关键词： Schisandra sphenanthera T2DM intestinal flora HPLC

Chromium Recycling from Argon-oxygen Decarburization Dust in Hot Metal Pre-dephosphorization Process

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2016年第9期23卷 867-873页

作者： dong-ping zhan Yang-peng zhang zhou-hua jiang De-wei WANG hui-shu zhang School of Metallurgy Northeastern University Metallurgical Engineering College Liaoning Institute of Science and Technology

The chromium recycling from the stainless steel dust of an argon-oxygen decarburization （AOD） furnace during a hot metal pretreatment process was investigated. Experiments at different temperatures or with different amounts of AOD dusts were carried out in a laboratory furnace equipped with MoSi2 heating elements and subsequently industrial experiments were conducted in a stainless steelmaking factory, in order to study the thermodynamic mechanism of C and Si reacted with Cr2O3 to get Cr from AOD dust. The results showed that the reaction between C and Cr2 O1 occurred below 1572.18 K. Although its reducing ability was weaker than that of Si, C enabled the Cr in Cr2O3 in the AOD dust to be recycled using the Si in the slag. By combining the AOD dust added in an earlier stage, the hot metal pretreatment slag added in a later stage could not only recycle Cr from AOD dust but also remove Si, S, and P. Higher hot metal temperatures resulted in higher Cr content and lower remained P concentration in the molten iron.

关键词： stainless steelmaking AOD dust chromium recycling hot metal pre-dephosphorization

Effects of yttrium and zirconium additions on inclusions and mechanical properties of a reduced activation ferritic/martensitic steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2020年第2期27卷 197-207页

作者： dong-ping zhan Guo-xing Qiu Chang-sheng Li Min Qi zhou-hua jiang hui-shu zhang School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina State Key Laboratory of Rolling and Automation.Northeastern University Shenyang 110819LiaoningChina School of Metallurgy Engineering Liaoning Institute of Science and TechnologyBenxi 117004.LiaoningChina

The effects of two alloying elements,i.e.,yttrium(Y)and zirconium(Zr),on the inclusion,microstructure,tensile property and impact toughness of reduced activation ferritic/martensitic(RAFM)steel are *** size and number of particles were determined by optical microscopy,and the particle types were examined by scanning electron *** size of?20% and?85% of the inclusions lied in the range of 0.5-1.0μm and 0.5-3.0μm,*** Y-and Y-Zr-containing specimens,the density of the fine inclusions,with a size less than 0.5μm,was found to be 1.06×10^17 and 9.82×10^16 m^-*** specimens were normalized at 1323 K for 30 min and tempered at 923 and 1023 K for 90 min,resulting in the formation of tempered martensite with M23C6 carbides and MX ***-containing RAFM steel tempered at 923 K formed M23C6 carbides and nano-sized carbides with Zr,conferring superior strength balance and impact *** yield strength of alloy reached 695 MPa,and a low ductile-brittle transition temperature of 238 K was maintained.

关键词： 9Cr oxide-dispersion-strengthened steel Inclusion Mechanical property DBTT Yttrium Zirconium

Research on Refining Technology of Clean Steel in a Plasma Ladle Furnace

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2012年第S2期19卷 691-694页

作者： zhan dong-ping LI Feng-gong zhang hui-shu jiang zhou-hua HE Ji-cheng School of Materials & Metallurgy Northeastern University

The clean steel refining tests carried out in a 100 kg plasma ladle furnace(PLF)were to show the metallurgical effects of the different plasma gases such as Ar-H_2 and Ar-CO_*** variations of carbon,nitrogen contents in steels and the mechanism of denitrogenation were *** with the conventional ladle furnace,when the plasma gases were injected into the ladle furnace,there was a decarburization process,the carburetion rates were reduced obviously. The carburetion rate is 3.6×10^(-6) per minute for the steel heated by conventional LF,and is 2.20 and 1.35 times of the heats blown 85%Ar-15%H_2 and 85%Ar-15%CO_2,*** the plasma ladle furnace operated with Ar-H_2 plasma gas, the denitrogenation of the molten steel *** lowest denitrogenation rate is 0.30×10^(-6)per minute when Ar-H_2 gas mixtures were *** main reactant gas is monatomic hydrogen and the main product of denitrogenation is NH_3 for Ar-H_2 injection.

关键词： steelmaking Plasma Ladle Furnace decarburization denitrogenation clean steel

Einstein Probe discovery of EP240408a: A peculiar X-ray transient with an intermediate timescale

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 222-240页

作者： Wenda zhang Weimin Yuan Zhixing Ling Yong Chen Nanda Rea Arne Rau Zhiming Cai huaqing Cheng Francesco Coti Zelati Lixin Dai Jingwei Hu shumei Jia Chichuan Jin dongyue Li Paul O’Brien Rongfeng Shen Xinwen shu Shengli Sun Xiaojin Sun Xiaofeng Wang Lei Yang Bing zhang Chen zhang shuang-Nan zhang Yonghe zhang Jie An David Buckley Alexis Coleiro Bertrand Cordier Liming Dou Rob Eyles-Ferris zhou Fan hua Feng Shaoyu Fu Johan P.U.Fynbo Lluis Galbany Saurabh W.Jha shuaiqing jiang Albert Kong Erik Kuulkers Weihua Lei Wenxiong Li Bifang Liu Mingjun Liu Xing Liu Yuan Liu Zhu Liu Chandreyee Maitra Alessio Marino Itumeleng Monageng Kirpal Nandra Jeremy Sanders Roberto Soria Lian Tao Junfeng Wang Song Wang Tinggui Wang Zhongxiang Wang Qingwen Wu Xuefeng Wu dong Xu Yanjun Xu Suijian Xue Yongquan Xue Zijian zhang Zipei Zhu Hu Zou Congying Bao Fansheng Chen Houlei Chen Tianxiang Chen Wei Chen Yehai Chen Yifan Chen Chenzhou Cui Weiwei Cui Yanfeng Dai dongwei Fan Ju Guan Dawei Han dongjie Hou Haibo Hu Maohai huang Jia Huo Zhenqing Jia Bowen jiang Ge Jin Chengkui Li Junfei Li Longhui Li Maoshun Li Wei Li Zhengda Li Tianying Lian Congzhan Liu Heyang Liu huaqiu Liu Fangjun Lu Laidan Luo Jia Ma Xuan Mao Haiwu Pan Xin Pan Liming Song hui Sun Yunyin Tan Qingjun Tang Yihan Tao Hao Wang Juan Wang Lei Wang Wenxin Wang Yilong Wang Yusa Wang Qinyu Wu Haitao Xu Jingjing Xu Xinpeng Xu Yunfei Xu Zhao Xu Changbin Xue Yulong Xue Ailiang Yan Haonan Yang Xiongtao Yang Yanji Yang Juan zhang Mo zhang Wenjie zhang Zhen zhang Zhen zhang Ziliang zhang donghua Zhao Haisheng Zhao Xiaofan Zhao Zijian Zhao Hongyan zhou Yilin zhou Yuxuan Zhu Zhencai Zhu National Astronomical Observatories Chinese Academy of Sciences School of Astronomy and Space Sciences University of Chinese Academy of Sciences Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Institute of Space Sciences (ICE) CSIC Institut d’Estudis Espacials de Catalunya (IEEC) Max Planck Institute for Extraterrestrial Physics Innovation Academy for Microsatellites Chinese Academy of Sciences Department of Physics University of Hong Kong School of Physics and Astronomy University of Leicester School of Physics and Astronomy Sun Yat-sen University Department of Physics Anhui Normal University Shanghai Institute of Technical Physics Chinese Academy of Sciences Physics Department Tsinghua University Nevada Center for Astrophysics University of Nevada Las Vegas Department of Physics and Astronomy University of Nevada Las Vegas South African Astronomical Observatory Department of Astronomy University of Cape Town Department of Physics University of the Free State Université Paris Cité CNRS Astroparticule et Cosmologie Université Paris Cité CEA Paris-Saclay IRFU/DAp-AIM Department of Astronomy Guangzhou University Cosmic Dawn Center (DAWN) Niels Bohr Institute University of Copenhagen Department of Physics and Astronomy Rutgers the State University of New Jersey Institute for Cosmic Ray Research The University of Tokyo ESA/ESTEC Department of Astronomy School of Physics huazhong University of Science and Technology INAF-Osservatorio Astrofisico di Torino Sydney Institute for Astronomy School of Physics The University of Sydney Department of Astronomy Xiamen University Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University Department of Astronomy University of Science and Technology School of Astronomy and Space Sciences University of Science and Technology of China Institute of Deep Space Sciences Deep Space Exploration Laboratory Department of Astronomy School of Physics and Astronomy Yunnan University Shanghai Astronomical Observatory Chi

We report the discovery of a peculiar X-ray transient,EP240408a,by Einstein Probe （EP） and follow-up studies made with EP,Swift,NICER,GROND,ATCA and other ground-based multiwavelength *** new transient was first detected with Wide-field X-ray Telescope （WXT） on board EP on April 8th,2024,manifested in an intense yet brief X-ray flare lasting for *** flare reached a peak flux of 3.9×10-9erg cm-2s-1in 0.5-4 ke V,～300 times brighter than the underlying X-ray emission detected throughout the *** and more precise follow-up observations by EP/FXT,Swift and NICER confirmed the finding of this new *** X-ray spectrum is non-thermal in 0.5-10 ke V,with a power-law photon index varying *** X-ray light curve shows a plateau lasting for ～4 d,followed by a steep decay till becoming undetectable ～10 d after the initial *** on its temporal property and constraints from previous EP observations,an unusual timescale in the range of 7-23 d is found for EP240408a,which is intermediate between the commonly found fast and long-term *** counterparts have been found in optical and near-infrared,with the earliest observation at 17 h after the initial X-ray detection,suggestive of intrinsically weak emission in these *** demonstrate that the remarkable properties of EP240408a are inconsistent with any of the transient types known so far,by comparison with,in particular,jetted tidal disruption events,gamma-ray bursts,X-ray binaries and fast blue optical *** nature of EP240408a thus remains an *** suggest that EP240408a may represent a new type of transients with intermediate timescales of the order of～10 *** detection and follow-ups of more of such objects are essential for revealing their origin.

关键词： X-ray transients ${\bm~{Einstein~~Probe}}$

Competitive precipitation behavior of hybrid reinforcements in copper matrix composites fabricated by powder metallurgy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2021年第6期28卷 1090-1096页

作者： Tao Lan Yi-hui jiang Xiao-jun zhang Fei Cao shu-hua Liang Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology Xi’an University of TechnologyXi’an 710048China

Copper matrix composites reinforced by in situ-formed hybrid titanium boride whiskers(TiB_(w))and titanium diboride particles(TiB_(2p))were fabricated by powder *** observations showed competitive precipitation behavior between TiB_(w) and TiB_(2p),where the relative contents of the two reinforcements varied with sintering *** on thermodynamic and kinetic assessments,the precipitation mechanisms of the hybrid reinforcements were discussed,and the formation of both TiB_(w) and TiB_(2p) from the local melting zone was thermodynamically *** precipitation kinetics were mainly controlled by a solid-state diffusion of B *** forming a compact compound layer,in situ reactions were divided into two stages,where Zener growth and Dybkov growth prevailed,***,the competitive precipitation behavior was attributed to the transition of the growth model during the reaction process.

关键词： metal matrix composite hybrid reinforcement in situ reaction growth kinetics

Transfer and transport of aluminum in filtration unit

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2007年第8期19卷 897-901页

作者： WANG Wen-dong YANG Hong-wei ZHAO hua-zhang jiang zhan-peng Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China. Department of Environmental Science and Engineering Peking University Beijing 100871 China

Aluminum salt coagulants were used prevalently in various water works. In this article, the effects of filtration on residual aluminum concentration and species distribution were researched by determining the concentration of different aluminum species before and after single layer filter, double layer filter, and membrane filtration units. In the research, size exclusion chromatography （SEC） was used to separate colloidal and soluble aluminum, ion exchange chromatography （IEC） was used to separate organic and inorganic aluminum, and inductivity coupled plasma-atomic emission spectrometry （ICP-AES） was used to determine the aluminum concentration. The results showed that the rapid filtration process had the ability of removing residual aluminum from coagulant effluent water, and that double layer filtration was more effective in residual aluminum removal than single layer filtration, while nano filtration was more effective than micro filtration. It was found that when the residual aluminum concentration was below lmg/L in sediment effluent, the residual aluminum concentration in treated water was above 0.2 mg/L. The direct rapid filtration process mainly removed the suspended aluminum. The removal of soluble and colloidal aluminum was always less than 10% and the natural small particles that adsorbed the amount of soluble or small particles aluminum on their surface were difficult to be removed in this process. Micro filtration and nano filtration were good technologies for removing aluminum; the residual aluminum concentration in the effluent was less than 0.05 mg/L.

关键词： aluminum species membrane filtration rapid filtration

Ultrasensitive and accurate diagnosis of urothelial cancer by plasmonic AuNRs-enhanced fluorescence of near-infrared Ag_(2)S quantum dots

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第11期41卷 3828-3838页

作者： dong zhang Cai-ping Ding Xiao-Yue Zheng Jia-zhou Ye Zi-Hai Chen Jian-hua Li Ze-Jun Yan Jun-hui jiang You-Ju huang Department of Urology&Nephrology Ningbo First HospitalThe Affiliated Hospital of Zhejiang UniversityNingbo315000China College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhou311121China Anhui Shenghaitang Traditional Chinese Medicine Decoction Pieces Co. LtdBozhou236800China Anhui Topway Testing Services Co. Ltd.Xuancheng Economic and Technological Development ZoneXuancheng242000China

Urothelial carcinoma(UC)is a common malignant tumor in the urinary system with high recurrence rate and low survival rate 5 years after *** present,imaging examination and other diagnostic methods have some shortcomings such as invasiveness and ***,it is urgent to develop a simple,rapid,noninvasive,highly sensitive and highly specific strategy to diagnose ***,a high-performance fluorescence sensor was constructed by the plasmonic gold nanorods(AuNRs)-enhanced near-infrared(NIR)fluorescence of silver sulfide quantum dots(Ag_(2)S QDs).The designed sensor can be used for the fast and accurate detection of small molecule single-transmembrane protein(FXYD3),which is overexpressed in 90%of ureteral cancers and 84%of high-grade bladder *** to its high specificity,the NIR fluorescence sensor achieves the detection of FXYD3 in the range of 0.25-150 ng·ml^(-1)with a detection limit of 0.2 ng·ml^(-1).Importantly,it also can be used for accurate diagnosis of FXYD3 in the urine of patients with relevant cancers,and the results are consistent with clinical cystoscopy and pathological *** proposed fluorescence sensor provides a simple,ultrasensitive,reliable method for UC screening,tumor-grade classification and postoperative monitoring and will have great potential for clinical applications.

关键词： Urothelial carcinoma FXYD3 Plasmonic enhanced fluorescence Ultrasensitive Accurate diagnosis