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Chemical Composition Effect on Microstructures and Mechanical Properties in Friction Stir Additive Manufacturing

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Acta Metallurgica Sinica(English Letters) 2022年第9期35卷 1494-1508页

作者： Jian-Yu Li Shi-ning kong Chi-Kun Liu Bin-Bin Wang Zhao Zhang State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering MechanicsDalian University of TechnologyDalian116024China

The variation of chemical compositions can affect the mechanical property of friction stir additive manufacturing(FSAM).Quantitative characterization of the relationship between the chemical composition and the mechanical property of FSAM components is key to control the quality of FSAM *** effect of chemical composition on the mechanical property of 6 xxx series aluminum alloy FSAM joint was studied by both experimental and numerical methods.A moving heat source model was established to simulate the heat transfer in FSAM *** average grain size was calculated by Monte Carlo model,and the precipitate evolution model was used to calculate the hardness and constitutive stress-strain *** validity of the numerical model was verified by *** indicate that the hardness and yield stress of 6 xxx series aluminum alloy FSAW joint can be enhanced by increasing silicon or magnesium *** increasing the content of magnesium(silicon),the volume fraction and the mean radius of MgSi can be increased when the content of silicon(magnesium) is *** the decrease in volume fraction,the average grain size can be *** changing the weight percentage of magnesium and silicon in different layers,the hardness and yield stress along the build direction can be controlled.

关键词： Friction stir additive manufacturing Chemical composition Mechanical property Microstructure Numerical model

MILP Model for Plant-Wide Optimal By-Product Gas Scheduling in Iron and Steel Industry

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Journal of Iron and Steel Research International 2010年第7期17卷 34-37页

作者： kong Hai-ning QI Er-shi HE Shu-guang, LI Gang Management School Tianjin University Tianjin 300072 China

The scheduling of by-product gases in by-product gas system,cogeneration system and production system is *** gas-consuming users are divided into three kinds according to their different characters and then a distribution model is built.A dynamic mixed integer linear programming（MILP）model for multiperiod optimization of by-product gas is performed to optimize by-product gas distribution to achieve total cost *** study shows that 6.2% operation cost is reduced by using the proposed model.

关键词： iron and steel industry MILP by-product gas distribution scheduling

A mathematical model for optimized operation and controlin a CDQ-Boiler system

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Journal of University of Science and Technology Beijing 2005年第5期12卷 390-393页

作者： De Wang Tao Yang Zhi Wen Junxiao Feng ning kong Qin Wang Weimin Wang Mechanical Engineering School University of Science and Technology Beijing Beijing 100083 China 　 Baoshao Iron and Steel Co. Ltd. Shanghai 201900 China

Based on analyzing the thermal process of a CDQ （coke dry quenching）-Boiler system, the mathematical model for opti-mized operation and control in the CDQ-Boiler system was developed. It includes a mathematical model for heat transferring process in the CDQ unit, a mathematical model for heat transferring process in the boiler and a combustion model for circulating gas in the CDQ-Boiler system. The model was verified by field data, then a series of simulations under several typical operating conditions of CDQ-Boiler were carried on, and in turn, the online relation formulas between the productivity and the optimal circulating gas, and the one between the productivity and the optimal second air, were achieved respectively. These relation equations have been success- fully used in a CDQ-Boiler computer control system in the Baosteel, to realize online optimized guide and control, and meanwhile high efficiency in the CDQ-Boiler system has been achieved.

关键词： coke dry quenching-boiler system optimized operation and control mathematical model

A molecular dynamics study on the tribological behavior of molybdenum disulfide with grain boundary defects during scratching processes

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Friction 2021年第5期9卷 1198-1212页

作者： Boyu WEI ning kong Jie ZHANG Hongbo LI Zhenjun HONG Hongtao ZHU Yuan ZHUANG Bo WANG School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China School of Mechanical Materials&Mechatronics EngineeringUniversity of WollongongWollongongNSW 2522Australia Beijing Institute of Spacecraft System Engineering Beijing 100094China

The effect of grain boundary(GB)defects on the tribological properties of MoS_(2) has been investigated by molecular dynamics(MD)*** GB defects‐containing MoS_(2) during scratching process shows a lower critical breaking load than that of indentation process,owing to the combined effect of pushing and interlocking actions between the tip and MoS_(2) *** wear resistance of MoS_(2) with GB defects is relevant to the misorientation angle due to the accumulation of long Mo-S bonds around the *** the adhesion strength between the MoS_(2) and substrate is an efficient way to improve the wear resistance of MoS_(2) with low‐angle GBs.

关键词： MoS_(2) grain boundary tribological behavior molecular dynamics misorientation angle

Spatial compartmentalization and temporal stability of associated microbiota in Pacific oyster Crassostrea gigas

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Journal of Oceanology and Limnology 2024年第4期42卷 1348-1358页

作者： Qiang FU Zichao YU Junyan ZHAO Lei GAO ning kong Lingling WANG Linsheng SONG Liaoning Key Laboratory of Marine Animal Immunology and Disease Control Dalian Ocean UniversityDalian 116023China Functional Laboratory of Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control Dalian Ocean UniversityDalian 116023China

The Pacific oyster Crassostrea gigas,one of the most exploited molluscs in the world,has suffered from massive mortality in recent decades,and the occurrence mechanisms have not been well *** this study,to reveal the relationship of associated microbiota to the fitness of oysters,temporal dynamics of microbiota in the gill,hemolymph,and hepatopancreas of *** during April 2018-January 2019 were investigated by 16 S rRNA gene *** microbiota in *** exhibited tissue heterogeneity,of which Spirochaetaceae was dominant in the gill and hemolymph while Mycoplasmataceae enriched in the ***-occurrence network demonstrated that the gill microbiota exhibited higher inter-taxon connectivity while the hemolymph microbiota had more *** richness(Chao 1 index)and diversity(Shannon index)of microbial community in each tissue showed no significant seasonal variations,except for the hepatopancreas having a higher richness in the ***,beta diversity analysis indicated a relatively stable microbiota in each tissue during the sampling period,showing relative abundance of the dominant taxa exhibiting temporal *** indicate that the microbial community in *** showed a tissue-specific stability with temporal dynamics in the composition,which might be essential for the tissue functioning and environmental adaption in *** work provides a baseline microbiota in *** and is helpful for the understanding of host-microbiota interaction in oysters.

关键词： Pacific oyster associated microbiota spatial compartmentalization temporal stability

Deep architecture for Heparin dosage prediction during continuous renal replacement therapy 36

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Deep architecture for Heparin dosage prediction during conti...

Spontaneous pneumomediastinum in an elderly COVID-19 patient:A case report

第36届中国控制会议

作者： ning kong Xiaoxi Liu Chunyan Liu Jie Lian Hongwei Wang Faculty of Electronic Information and Electrical Engineering Dalian University of Technology The second hospital of Dalian medical university

ISBN: (纸本)9781538629185

Continuous renal replacement therapy（CRRT） is the mainstream approach currently for blood *** process needs anticoagulation to prevent blood ***,as a widely used anticoagulant,requires the doctor to give an appropriate *** this paper,a new method for Heparin dosage prediction is proposed based on deep *** proposed deep architecture consists of two parts,i.e.,a deep belief network（DBN） at the bottom and a regression layer at the *** DBN is employed for unsupervised feature *** can learn effective features for the prediction task without using the recorded dosage,only using the clinical examination *** incorporate task learning in the deep architecture,a regression layer is used above the DBN which uses the recorded dosage for a supervised *** on test datasets show good performance of the deep architecture and it achieves at least 10%higher accuracy at 5%coincidence rate than other traditional prediction approaches.

关键词： Deep learning Neural networks Continuous renal replacement therapy(CRRT) Dosage prediction

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World Journal of Clinical Cases 2020年第16期8卷 3573-3577页

作者： ning kong Chen Gao Mao-Sheng Xu Yuan-Liang Xie Chang-Yu Zhou Department of Radiology The First Clinical Medical College of Zhejiang Chinese Medical UniversityHangzhou 310053Zhejiang ProvinceChina Department of Radiology The First Affiliated Hospital of Zhejiang Chinese Medical UniversityHangzhou 310006Zhejiang ProvinceChina Department of Radiology Central Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430014Hubei ProvinceChina

BACKGROUND Spontaneous pneumomediastinum(SPM)is more common in young adults,usually caused by external factors like *** causes symptoms such as chest pain or dyspnea,but it is rare to see elderly patients who develop *** we report the case of an elderly patient diagnosed with coronavirus disease 2019(COVID-19)who neither got mechanical ventilation nor had chest trauma but were found to develop SPM for unknown *** SUMMARY A 62-year-old man complained of a 14-d history of fever accompanied by dry cough,shortness of breath,wheezing,myalgia,nausea,and ***-time fluorescence polymerase chain reaction confirmed the diagnosis of *** patient was treated with supplementary oxygen by nasal cannula and gamma *** symptomatic treatments included antibacterial and antiviral *** day 4 of hospitalization,he reported sudden onset of *** day 6,he was *** day 12,the patient reported worsening right-sided chest pain which eventually progressed to bilateral chest *** was diagnosed with SPM,with no clear trigger *** treatment was *** follow-up,the pneumomediastinum had resolved and the patient recovered without other *** We presume that aging lung changes and bronchopulmonary infection play an important part in the onset of SPM in COVID-19,but severe acute respiratory syndrome may represent a separate pathophysiologic mechanism *** the incidence of SPM in elderly patients is low,clinicians should be alert to the possibility of SPM in those infected with severe acute respiratory syndrome coronavirus 2 for life-threatening complications such as cardiorespiratory arrest may occur.

关键词： Aging Spontaneous pneumomediastinum COVID-19 SARS Case report

Host Interferon-Stimulated Gene 20 Inhibits Pseudorabies Virus Proliferation

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Virologica Sinica 2021年第5期36卷 1027-1035页

作者： Xiaoyong Chen Dage Sun Sujie Dong Huanjie Zhai ning kong Hao Zheng Wu Tong Guoxin Li Tongling Shan Guangzhi Tong Department of Swine Infectious Diseases Shanghai Veterinary Research InstituteChinese Academy of Agricultural SciencesShanghai 200241China Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose Yangzhou UniversityYangzhou 225009China

Host interferon-stimulated gene 20(ISG20)exerts antiviral effects on viruses by degrading viral RNA or by enhancing IFN ***,we examined the role of ISG20 during pseudorabies virus(PRV)*** found that ISG20 modulates PRV replication by enhancing IFN ***,ISG20 expression was upregulated following PRV infection and poly(I:C)*** expression of ISG20 inhibited PRV proliferation in PK15 cells,whereas knockdown of ISG20 promoted PRV *** addition,ISG20 expression upregulated IFN-βexpression and enhanced IFN downstream signaling during PRV ***,PRV UL24 suppressed the transcription of ISG20,thus antagonizing its antiviral *** domain mapping analysis showed that the N terminus(amino acids 1-90)of UL24 was responsible for the inhibition of ISG20 ***,these findings characterize the role of ISG20 in suppressing PRV replication and increase the understanding of host-PRV interplay.

关键词： Interferon-stimulated gene 20(ISG20) Interferon Pseudorabies virus(PRV) UL24

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双相钢的力学性能和对成形极限的影响

机械工程学报 2017年第12期53卷 140-146页

作者：孔政孔宁张杰李洪波北京科技大学机械工程学院北京100083

对两个来自不同生产线的冷轧双相钢DP780试样的主要力学性能进行比较,发现相同牌号的DP钢产品性能有显著差异。建立拉伸过程的有限元模型,将拉伸试验和有限元仿真相结合,利用材料失效点主应变二次导数的变化规律准确预测DP780在拉伸过... 详细信息

对两个来自不同生产线的冷轧双相钢DP780试样的主要力学性能进行比较,发现相同牌号的DP钢产品性能有显著差异。建立拉伸过程的有限元模型,将拉伸试验和有限元仿真相结合,利用材料失效点主应变二次导数的变化规律准确预测DP780在拉伸过程中的缩颈和破裂。研究发现相同牌号的DP钢产品成形极限亦有明显不同。最后从延伸长度和极限应变两方面定量分析应变强化指数n值和强度系数K值的变化对拉伸过程成形极限的影响。发现应变强化指数n值的变化对成形极限影响较大,强度系数K值的变化对成形极限影响较小。增大n值可以提高发生缩颈和破裂时的延伸长度和极限应变。

关键词：冷轧双相钢力学性能成形极限拉伸试验