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Evaluation and improvement of pearlite microstructure and mechanical properties in 45Cr4NiMoV and 50Cr5NiMoV steels

Journal of Iron and Steel Research International 2022年第12期29卷 1995-2005页

作者： Kai-quan Liu Xue-jiao Zhang Xiao-yang song lin Zhao lin Zhu State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004HebeiChina Tianjin Heavy Industries Research&Development Co. Ltd.CFHITianjin 300457China China First Heavy Industry Qiqihar 161042HeilongjiangChina Central Iron and Steel Research Institute Co. Ltd.Beijing 100081China

The microstructure and mechanical properties of pearlite in 45Cr4NiMoV and 50Cr5NiMoV steels were studied and *** microstructural characteristics of pearlite of two steels were carefully examined by optical microscopy,scanning electron microscopy and transmission electron microscopy(TEM),and the type,size and relative amount of extracted carbide particles were analyzed by X-ray diffraction and TEM coupled with selected area electron *** hardness,tensile property,impact and fracture toughness of pearlite of two steels were also ***,the carbide dissolution kinetics of 45Cr4NiMoV and 50Cr5NiMoV steels were *** results indicated that the carbides in 50Cr5NiMoV steel exhibited higher dissolution temperature than those in 45Cr4NiMoV steel,which induced different morphologies of pearlite after eutectoid *** to the pearlite with lamellar M_(23)C_(6)carbides in 45Cr4NiMoV steel,the pearlite with the mixture of spheroidized M_(7)C_(3)and lamellar M_(23)C_(6)carbides in 50Cr5NiMoV steel possessed higher impact and plane-strain fracture toughness but lower hardness and strength,because different pearlite morphologies led to different mechanical *** order to further improve the comprehensive properties of the steels,the fraction of M_(7)C_(3)for the material with acceptable properties was examined and dissolution kinetic of M_(7)C_(3)was ***,the austenitizing temperature and holding time could be appropriately selected to keep enough undissolved M_(7)C_(3)in the steels.

关键词： Microstructure Carbide Back-up roll Mechanical property Toughness Spheroidization

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Interpretation of theη_(1)(1855)as a KK_(1)(1400)+***

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Science China(Physics,Mechanics & Astronomy) 2022年第6期65卷 60-66页

作者： Xiang-Kun Dong Yong-Hui lin Bing-song Zou CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Helmholtz-Institut fur Strahlen-und Kernphysik and Bethe Center for Theoretical Physics Universitat BonnBonn D-53115Germany School of Physics Central South UniversityChangsha 410083China

An exotic state with J^(PC)=1^(−+),denoted byη1(1855),was observed by BESIII Collaboration recently in J/ψ→γηη′.The fact that its mass is just below the threshold of KK_(1)(1400)stimulates us to investigate whether this exotic state can be interpreted as a KK_(1)(1400)+*** or *** the one boson exchange model,we show that it is possible for KK_(1)(1400)with J^(PC)=1^(−+)to bind together by taking the momentum cutoffΛ&2 GeV and yield the same binding energy as the experimental value whenΛ≈2.5 *** this molecular picture,the predicted branch ratio Br(η1(1855)→ηη′)≈15%is consistent with the experimental results,which again supports the molecular explanation ofη1(1855).Relevant systems,namely KK_(1)(1400)with JPC=1−−and KK_(1)(1270)with J^(PC)=1^(−±),are also investigated,some of which can be searched for in the future experiments.

关键词： hadronic molecule exotic hadrons one boson exchange

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Mitochondrial dynamics caused by QoIs and SDHIs fungicides depended on FgDnm1 in Fusarium graminearum

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Journal of Integrative Agriculture 2023年第2期22卷 481-494页

作者： KANG Jin-bo ZHANG Jie LIU yin-kai song Ji-chang OU Jian-lin TAO Xian ZHOU Ming-guo DUAN Ya-bing College of Plant Protection Nanjing Agricultural UniversityNanjing 210095P.R.China

Fusarium head blight(FHB) caused by Fusarium graminearum is a devastating fungal disease on small grain cereal crops,because it reduces yield and quality and causes the mycotoxin contamination to the *** and dynamin-related proteins(DRPs) are large GTPase superfamily members,which are typically involved in the budding and division of vesicles in eukaryotic cells,but their roles in Fusarium *** ***,we found that FgDnm1,a DRP and homolog to Dnm1 in Saccharomyces cerevisiae,contributes to the normal fungal growth,sexual reproduction and sensitivity to *** addition,we found FgDnm1 co-localizes with mitochondria and is involved in toxisome formation and deoxynivalenol(DON) *** quinone outside inhibitors(QoIs) and succinate dehydrogenase inhibitors(SDHIs) cause fragmentated morphology of ***,the deletion of FgDnm1displays filamentous mitochondria and blocks the mitochondrial fragmentation induced by QoIs and *** together,our studies uncover the effect of mitochondrial dynamics in fungal normal growth and how such events link to fungicides sensitivity and toxisome ***,we concluded that altered mitochondrial morphology induced by QoIs and SDHIs depends on FgDnm1.

关键词： Fusarium graminearum FgDnm1 mitochondrial dynamics fungicides

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Optimization of PGNAA device and algorithm for testing basicity index of sinter mixture

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Nuclear Science and Techniques 2021年第1期32卷 46-57页

作者： Long Zhao Xu Xu Jing-Bin Lu Ya-lin Gong Qing-Feng song Qing-Min Shang Wei Zhang De-You yin Yan-Feng Li College of Physics Jilin UniversityChangchun 130012China Dandong Dongfang Measurement and Control Technology Co. LtdDandong 118002China

Sinter is the main raw material in the blast furnace iron-making process,and basicity(CaO/SiO2)is an important quality index of *** gamma neutron activation analysis is a multi-elemental online detection technology that has been successfully applied in cement,coal,*** with cement as a raw material,sinter exhibits poor moderation ability and a large neutron absorption cross ***,cement detection devices are not suitable for sinter mixture *** this study,a prompt gamma neutron activation analysis equipment used for testing cement was re-optimized to render it suitable for measuring a sinter *** Monte Carlo simulation,the comprehensive detection efficiency of the detection device improved by 71.52%.Because of the gamma-ray self-shielding effect of the sinter mixture,the detection errors of CaO and SiO2 are *** applying the gamma-ray self-shielding correction algorithm,the detection accuracies improved,and their linear correlation coefficients R2 exceeded ***,by applying an improved analyzer to a sintering plant,the first-grade product rate of the factory increased by 4.64%.

关键词： Prompt gamma neutron activation analysis Sinter Basicity Monte Carlo simulation

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Design considerations for electromagnetic couplers in contactless power transmission systems for deep-sea applications

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第10期11卷 824-834页

作者： Ze-song LI De-jun LI lin lin ying CHEN State Key Lab of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027. China

In underwater applications of contactless power transmission(CLPT) systems,high pressure and noncoaxial operations will change the parameters of electromagnetic(EM) *** a result,the system will divert from its optimum *** a reluctance modeling method,we investigated the gap effects on the EM coupler in deep-sea *** and measurements were performed to analyze the influence of high pressure and noncoaxial alignments on the *** was shown that it is useful to set a relatively large gap between cores to reduce the influence of *** were carried out to verify the transferring capacity of the designed coupler and system for a fixed *** results showed that an EM coupler with a large gap can serve a stable and efficient power transmission for the CLPT *** designed system can transfer more than 400 W electrical power with a 2-mm gap in the EM coupler,and the efficiency was up to 90% coaxially and 87% non-coaxially in 40 MPa salt ***,a mechanical layout of a 400 W EM coupler for the underwater application in 4000-m deep sea was proposed.

关键词： Contactless power transmission(CLPT) EM coupler Deep sea Gap effects

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Neural network wind retrieval from ERS-1/2 scatterometer data

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Acta Oceanologica Sinica 2006年第3期25卷 35-39页

作者： lin Mingsen song Xingai JIANG Xingwei National Satellite Ocean Application Service Beijing 100081 China College of Physical and Environment Oceanography Ocean University of China Qingdao 266003 China

A neural network methodology is presented to retrieve wind vectors from ERS - 1/2 scatterometer data. The wind directional ambiguities are eliminated by a circular median filter algorithm. All data come from ERS - 1/2 scatterometer data collocated pairs with CMCD4 vector. Comparing the results with CMCD4 and ECMWF wind vector,they agree well, which indicates that it is possible to extract wind vector from the ERS-1/2 scatterometer with the neural network method.

关键词： BP- NN scatterometer wind fields retrieval disambiguate

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Enhanced thermoelectric performance of n-type Bi_(2)Te_(2.7)Se_(0.3) via a simple liquid-assisted shear exfoliation

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Journal of Materials Science & Technology 2022年第22期117卷 251-258页

作者： Yifeng Wang Yilin song Kaikai song lin Pan Changchun Chen Kunihito Koumoto Qingfeng Liu College of Materials Science and Engineering Nanjing Tech UniversityNanjing 210009China Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing Tech UniversityNanjing 210009China Nagoya Industrial Science Research Institute Nagoya 464-0819Japan Center of Nanotechnology King Abdulaziz UniversityJeddah 21589Saudi Arabia State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China

A liquid-assisted shear exfoliation (LASE) as a new powder metallurgy method coupled with spark plasmasintering (SPS) was applied for n-type Bi_(2)Te_(2.7)Se_(0.3) and the effects on microstructure and anisotropictransport properties were investigated. Results revealed an effective reduction of average grain size dueto LASE and a high texturing in the bulks. Moreover, along the in-plane direction, electrical conductivitywas increased noticeably due to an enhanced carrier concentration, leading to a significantly improvedpower factor of 25 μW cm^(–1) K^(–2) at 303 K. Meanwhile, the total thermal conductivity was reduced effectively owing to reduction both in lattice component due to enhanced phonon scattering with the grainsize reduction, and in the bipolar component inhibited by the increased carrier concentration. Ultimately,a peak thermoelectric figure of merit (ZT) value of 0.83 was obtained at 448 K along the in-plane direction, increased by 95% compared with the pristine one. These results demonstrate the LASE process as auseful assistant method for enhancing the TE performance of layered materials.

关键词： Bi_(2)Te_(2.7)Se^(0.3) Liquid-assisted shear exfoliation Textured microstructure Thermoelectric

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Mapping the Uniformity of Deep Level Defects Distribution by Scanning Photoluminescence

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Chinese Physics Letters 1991年第7期8卷 380-383页

作者： WENG Yumin lin song ZONG Xiangfu Institute of Materials Science Fudan UniversityShanghai 200433

Deep level defects in undoped semi-insulating GaAs were investigated by photo-luminescence technique at room *** 0.69eV band is associated with the main mid-gap level EL2,and the 0.76eV band is suggested to be caused by some native point defects related to excess As,such as As anti-site ***-dimensional and pseudo three-dimensional plots of the EL2 related band have been observed for as grown and annealed wafers.

关键词： temperature EL2 Deep

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The uncertainty propagation analysis of the projectile-barrel coupling problem

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Defence Technology（防务技术） 2017年第4期13卷 229-233页

作者： lin-fang Qian Guang-song Chen Nanjing University of Science & Technology 200 Xiaolingwei Nanjing Jiangsu 210094 China

Based on the model which couples the projectile and gun barrel during an interior ballistic cycle,the uncertainty propagation analysis of the model is presented caused by the uncertainty of the input *** Bootstrap method is employed to calculate the statistical moments(*** mean,variance,skewness coefficient and kurtosis coefficient)of the parameters of the ***,the maximum entropy method is used to estimate the probability density function(PDF)and the cumulative density function(CDF),the interval of the parameters of the projectile are also ***,the results obtained are compared to the results calculated by Monte Carlo(MC)method to verify the effectiveness of the presented ***,the rule and the uncertainty propagation model of the projectile-barrel coupling system are given with the variation of the uncertainties of the input parameters.

关键词： Uncertainty propagation Projectile-barrel coupling Bootstrap Maximum entropy Interval

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Immune checkpoint inhibitors in malignant lymphoma: Advances and perspectives

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Chinese Journal of Cancer Research 2020年第3期32卷 303-318页

作者： Ningjing lin Yuqin song Jun Zhu Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of LymphomaPeking University Cancer Hospital&InstituteBeijing 100142China

Classical Hodgkin lymphoma(cHL) has been identified with universal genetic alterations of chromosome 9p24.1,which contains PD-L1/PD-L2 *** amplification of 9p24.1 is associated with the increased expression of PDL1 and PD-L2 on RS cells, which promotes their immune evasion, and subsequently makes cHL sensitive to PD-1 *** PD-1 inhibitors have shown significant efficacies with overall response rate(ORR) of 70%-90% in relapse/refractory(r/r) cHL and have acquired the approvals for this ***, more and more studies are conducted to investigate PD-1 blockade in earlier disease course and in combination with neo-agents or *** cHL, non-Hodgkin lymphoma(NHL) consists of numerous subtypes harboring highly biological *** a few subtypes have been shown to have genetic alteration of 9p24.1 including primary mediastinal B cell lymphoma(PMBL), gray zone lymphoma(GZL) with features intermediate between diffuse large B cell lymphoma(DLBCL) and cHL, primary central nervous system lymphoma(PCNSL) and primary testicular lymphoma(PTL).Epstein-Barr virus(EBV)-associated lymphomas have a virally mediated overexpression of PD-L1, also making them sensitive to PD-1 ***, PD-1 inhibitors are less effective in most r/r NHL than in r/r *** understanding of the biological features of NHL and immune checkpoint inhibitors(ICPi) combined therapy is the research focus in the *** this review, we outlined the recent progress of ICPi in lymphoma originating from clinical studies.

关键词： Immunotherapy immune checkpoint inhibitor PD-1 blockade Hodgkin lymphoma non-Hodgkin lymphoma

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