检索结果-南通市图书馆

Journal of Iron and Steel Research International 2021年第12期28卷 1504-1514页

作者： Yusuf Abba Yusuf Wan-ming li Shi-shen li Hua-bing li Xi-min Zang School of Materials and Metallurgy University of Science and Technology LiaoningAnshan114051LiaoningChina School of Metallurgy Northeastern UniversityShenyang110819LiaoningChina

The pressurized electroslag remelting(PESR)process has a remarkable impact on manufacturing high nitrogen steels,which can alter the physical parameters of steels and solidification conditions at different atmospheric *** principle and applications of the PESR process are *** effect of atmospheric pressure,including Gibbs free energy,nitrogen solubility,melting point,viscosity,diffusion coefficient,partition coefficient,and nucleation rate,is explicitly expressed by empirical knowledge and quantified by thermodynamic *** variation of interfacial heat transfer coefficient is discussed at different atmospheric ***,the effect of atmospheric pressure on physical parameters of steels and solidification conditions during the PESR process is still in their embryonic research stage and it is important to do further study in this research ***,a general concluding remark and suggestions for future development are proposed.

关键词： Pressure High nitrogen steel Pressurized electroslag remelting Thermodynamic Physical parameter Solidification condition

Boosting fast interfacial li^(+)transport in solid-state li metal batteries via ultrathin Al buffer layer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2023年第5期16卷 6825-6832页

作者： Shengnan Zhang Qing Sun Guangmei Hou Jun Cheng linna Dai Jianwei li lijie Ci Key Laboratory for liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education) Research Center for Carbon NanomaterialsSchool of Materials Science and EngineeringShandong UniversityJinan 250061China School of light Industry and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China State Key Lab of Advanced Welding and Joining School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China School of Science Hubei University of TechnologyWuhan 430068China University of Health and Rehabilitation Sciences Qingdao266071China

Na superionic conductor(NASICON)-type li_(1.5)Al_(0.5)Ge_(0.5)P_(3)O_(12)(LAGP)solid state electrolytes(SSEs)have attracted significant interests thanks to the prominent ionic conductivity(>10^(–4)S·cm^(–1))at room temperature and superb stability in ***,its application has been hindered by the lithium dendrites and the intrinsic interfacial instability of LAGP towards metallic li,***,by magnetron sputtering(MS),an ultrathin Al film is deposited on the surface of the LAGP pellet(Al-LAGP).By in-situ alloying reaction,the spontaneously formed liAl buffer layer inhibits the side reaction between LAGP SSEs and li metal,induces the uniform distribution of interfacial electric field as *** functional theory(DFT)calculations demonstrate that the liAl alloy surface promotes the diffusion of lithium atoms due to the lower energy barrier,thereby inhibiting the formation of lithium ***,the li/Al-LAGP-Al/li symmetric cells show a low resistance of 210Ωand a durable lifespan over 1,200 h at a high current density of 0.1 mA·cm^(-2).Assembled all solid state lithium metal batteries(ASSLMBs)with liFePO_(4)(LFP)cathode significantly improve cycle stability and rate performance,proving a promising stabilization strategy towards the NASIOCN type electrolyte/anode interface in solid state li metal batteries.

关键词： li_(1.5)Al_(0.5)Ge_(0.5)P_(3)O_(12) solid-state battery li+transport interfacial modification Al buffer

Spatiotemporal consistency-based adaptive hand-held video stabilization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2020年第1期63卷 226-228页

作者： Xiao li Shuai li Hong QIN Aimin HAO State Key Laboratory of Virtual Reality Technology and Systems Beihang University Beihang University Qingdao Research Institute Department of Computer Science Stony Brook University

This study develops a novel, joint optimization method to successively respect spatial structure consistency and temporal feature constraints. Our method is more flexible and adaptive as we regard the camera multitrack motion to be noisy signals and adaptively suppress the noise without manual intervention. In addition, our method can achieve stabilization effects similar to that obtained by 3D

关键词： IMF EMD red frame Spatiotemporal consistency-based adaptive hand-held video stabilization

Effect of Cooling Rate on Microstructure and Mechanical Properties of 20CrNi2MoV Steel

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2016年第4期29卷 353-359页

作者： Jian Zhang Chang-Sheng li Bin-Zhou li Zhen-Xing li Xue-Dong Pang State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 China Fushun Special Steel Co. Ltd Fushun 110003 China

Thermo-mechanical process and continuous cooling process were carried out on 20CrNi2MoV steel. Three cooling rates were implemented to optimize the mechanical properties. The microstructure evolution, precipitation behavior, and strengthening mechanisms were systematically investigated, and the fracture mechanisms were analyzed via combination of impact fracture morphologies and deflection-load curves. The experimental results indicate that the transformed microstructure of experimental steel is all complex consisting of granular bainitic ferrite and bainitic ferrite with dispersed martensite/austenite （M/A） constituents in the matrix at cooling rates of 13, 21, and 29 ℃/s. When the cooling rate increases, the grain of the steel is obviously refined. The sizes of the bainitic ferrite are 5.8, 4.7, and 3.1 μm under cooling rates of 13, 21, and 29 ℃/s, respectively. The refinement of the bainitic ferrite plays a dominant role in strength increasing and also contributes to high crack propagation energy. However, the morphologies of M/A constituents obtained under different cooling rates contribute to different crack initiation energies and then affect the impact property.

关键词： 20CrNi2MoV steel Microstructure Cooling rate Mechanical properties

Enhancing lithium-ion and electric conductive li_(2)FeSiO_(4)cathode through in situ boron-doping and carbon-coating strategy

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第12期41卷 4055-4064页

作者： Hao-Xiang li Jia-Hui Zhu Xiao-Bing Huang Tao Zhou Yu-Rong Ren Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Water Treatment Functional Materials Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion AircraftCollege of Chemistry and Materials EngineeringHunan University of Arts and ScienceChangde 415000China Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power BatterySchool of Materials Science and EngineeringChangzhou UniversityChangzhou 213164China

The extremely low electrical conductivity and ion-diffusion coefficient of li_(2)FeSiO_(4)limits its application as a cathode material in lithium-ion ***,in situ boron-doped li_(2)FeSi_(1)-xB_(x)O_(4-δ)/C(x=0,0.01,0.03,0.05 and 0.07)at the Si site was prepared via the solid-state reaction method using pitch as the c arbon source.B doping in the lattice structure and a c arbon coating on the surface of the composites could effectively enhance the li^(+)/electron ***,the reduced particle size of the active material with the relatively high specific area via borondoped modification could improve the wettability between the electrolyte and *** the synergistic effect of appropriate boron doping and carbon coating,it exhibits a good rate performance,specific capacity,and cycling *** a result,the as-prepared li_(2)FeSi_(0.95)B_(0.05)O_(4-δ)/C cathode showed a high discharge capacity of 160.7mAh·g^(-1)at 0.2C,and the capacity retention rate was 96%after 100 cycles at *** work presents an effective path for designing advanced cathode materials for lithium-ion batteries.

关键词： li_(2)FeSiO_(4) Carbon coating Boron doping Synergistic effect lithium-ion battery

Mo_(3)Nb_(14)O_(44): A New li^(+) Container for High-Performance Electrochemical Energy Storage

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2021年第1期4卷 65-71页

作者： Renjie li Guisheng liang Xiangzhen Zhu Qingfeng Fu Yongjun Chen lijie Luo Chunfu lin Institute of Materials for Energy and Environment School of Materials Science and EngineeringQingdao UniversityQingdao 266071China School of Materials Science and Engineering Hainan UniversityHaikou 570228China Songshan Lake Materials Laboratory Dongguan 523808China

Intercalating Nb-based oxides are promising anode compounds for lithiumion batteries since they have both good safety and large ***,the research in this field is still ***,Mo_(3)Nb_(14)O_(44)with a large theoretical capacity of 398 mAh g^(–1)(Mo^(64)←→Mo^(4+)and Nb^(5+)←→Nb^(3+))is exploited as a new Nb-based oxide anode compound,and Mo_(3)Nb_(14)O_(44)micron-sized particles(Mo_(3)Nb_(14)O_(44)-M)and Mo3Nb14O44 nanowires(Mo_(3)Nb_(14)O_(44)-N)are ***3Nb14O44 owns a tetragonal shear ReO_(3)crystal structure(high-symmetric 14 space group)constructed by 4×4×∞(Mo,Nb)O_(6)octahedron blocks linked by Mo O4 tetrahedra,forming an A–B–A layered structure with a large interlayer *** interesting structure allows fast li+storage within the interlayers and significant intercalation-pseudocapacitive behavior,leading to the high rate performance of Mo_(3)Nb_(14)O_(44)-M/Mo_(3)Nb_(14)O_(44)-N with a large 10 C versus 0.1 C capacity retention percentage of 38.1/54.2%.Mo_(3)Nb_(14)O_(44)-M/Mo_(3)Nb_(14)O_(44)-N further exhibits a safe operating potential of 1.72/1.68 V,large reversible capacity of 323/321 m Ah g^(–1)at 0.1 C,high initial coulombic efficiency of 92.2/90.0%,and good cycling stability with 71.8/75.8%capacity retention after 1000 cycles at10 ***,a li Mn_(2)O_(4)/Mo_(3)Nb_(14)O_(44)-N full cell also performs ***,Mo_(3)Nb_(14)O_(44)holds great promise as a fast-charging,safe,largecapacity,high-efficient,and long-life li^(+)anode container.

关键词： anode in situ XRD li^(+)storage Mo3Nb14O44 shear ReO3 crystal structure

Microwave-assisted synthesis of Cr_(3)C_(2)@C core shell structure anchored on hierarchical porous carbon foam for enhanced polysulfide adsorption in li-S batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2021年第7期14卷 2345-2352页

作者： Xierong Zeng Jianxin Tu Shuangshuang Chen Shaozhong Zeng Qi Zhang Jizhao Zou Kezhi li Shenzhen Key Laboratory of Special Functional Materials&Shenzhen Engineering Laboratory for Advance Technology of ceramics College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China State Key Laboratory of Solidification Processing Carbon/Carbon Composites Research CenterNorthwestern Polytechnical UniversityXi’an 710072China School of Materials Science and Engineering Anhui University of TechnologyMa'anshan 243002China College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118China BCMaterials Basque Center for MaterialsApplications and NanostructuresUPV/EHU Science Park48940 LeioaSpainIKERBASQUEBasque Foundation for Science48013 BilbaoSpain

In this paper,we use microwave reduction strategy to synthesize a new bi-functional sulfur host material at the service of cathode substrate for lithium-sulfur batteries(LSBs),the composite is made of hierarchical porous carbon foam supported carbon-encapsulated chromium carbide nano-particles(Cr_(3)C_(2)@C/HPCF),in which the well-distributed conductive Cr_(3)C_(2) nano-particles can act as powerful chemical adsorbent and are effective in restraining the shuttle effect of lithium polysulfides(liPSs).Test results show that the Cr_(3)C_(2)@C/HPCF based sulfur electrodes with 75 wt.%of sulfur exhibit a high initial discharging capacity of 1,321.1 mAh·g^(−1) at 0.1 C(3.5 mg·cm^(−2)),and a reversible capacity can still maintain stability at 1,002.1 mAh·g^(−1) after 150 *** increasing the areal sulfur loading to 4 mg·cm^(−2),the electrodes can still deliver an initial discharging capacity of 948.0 mAh·g^(−1) at 0.5 C with ultra-slow capacity decay rate of 0.075%per cycle during 500 ***,the adsorption energy between the Cr_(3)C_(2) surface and liPSs as well as theoretic analysis based on first-principles is also investigated.

关键词： Cr_(3)C_(2)nanoparticles core shell structure chemisorptions microwave reduction hierarchical porous carbon foam li-S batteries

Denitrification and microbial community in MBBR using A. donax as carbon source and biofilm carriers for reverse osmosis concentrate treatment

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 Environmental Sciences 2019年第10期31卷 133-143页

作者： li li Guokai Yan Haiyan Wang Zhaosheng Chu Zewen li Yu ling Tong Wu State Key Laboratory of Environmental Criteria And Risk As sessment Chinese Research Academy of Environmental SciencesBeijing 100012China Engineering Center for Environmental Pollution Control Chinese Research Academy of Environmental SciencesBeijing 100012China National Engineering Laboratory for Lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China State Environmental Protection Key Laboratory for Lake Pollution Control Chinese Research Academy of Environmental SciencesBeijing 100012China

In this study,raw Arundo donax(***)pieces were applied as carbon source and biofilm carriers for denitrification in a lab-scale moving bed biofilm reactor(MBBR)for the treatment of reverse osmosis concentrate gathered from local wastewater reuse *** stable phase(about 60 days),efficient denitrification performance was obtained with73.2%±19.5%NO3--N average removal and 8.10±3.45 g N/(m3·day)NO3--N average volumetric removal *** balance analysis showed that 4.84 g *** was required to remove 1 g *** real-time PCR analysis results showed that the copy numbers of 16S r-RNA,narG,nirS,nosZ and anammox gene of carrier biofilm and suspended activated sludge in the declination phase(BF2 and AS2)were lower than those of samples in the stable phase(BF1 and AS1),and relatively higher copy numbers of nirS and nirK genes with lower abundance of narG and nosZ genes were ***-throughput sequencing analysis was conducted for BF2 and AS2,and similar dominant phyla and classes with different abundance were *** class Gammaproteobacteria affiliated with the phylum Proteobacteria was the most dominant microbial community in both BF2(52.6%)and AS2(41.7%).The PICRUSt prediction results indicated that 33 predictive specific genes were related to denitrification process,and the relative abundance of 18 predictive specific genes in BF2 were higher than those in AS2.

关键词： Arundo donax carbon source Denitrification MBBR Reverse osmosis concentrate Nitrate removal Microbial community High-throughput sequencing

Effects of Chinese Medicine on Symptoms,Syndrome Evolution,and Lung Inflammation Absorption in COVID-19 Convalescent Patients during 84-Day Follow-Up after Hospital Discharge:A Prospective Cohort and Nested Case-Control Study

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2021年第4期27卷 245-251页

作者： li li GOU Chun-yan li Xue-mei SONG Wen-yan WANG Xiao-jun li Hong-ying li Hong-yan li Xiu-hui Integrated Traditional Chinese and Western Medicine Center Beijing Youan HospitalCapital Medical UniversityBeijing(100069)China Chronic Disease Management Center Beijing Youan HospitalCapital Medical UniversityBeijing(100069)China Department of Radiology Beijing Youan HospitalCapital Medical UniversityBeijing(100069)China

Objective:To observe the changes of symptoms,Chinese medicine(CM)syndrome,and lung inflammation absorption during convalescence in patients with coronavirus disease 2019(COVID-19)who had not totally recovered after hospital discharge and whether CM could promote the improvement ***:This study was designed as a prospective cohort and nested case-control study.A total of 96 eligible patients with COVID-19 in convalescence were enrolled from Beijing Youan Hospital and Beijing Huimin Hospital and followed up from the hospital discharged *** were divided into the CM(64 cases)and the control groups(32 cases)based on the treatment with or without CM and followed up at 14,28,56,and 84 days after *** the CM group,patients received the 28-day CM treatment according to two types of CM *** in clinical symptoms,CM syndrome,and absorption of lung inflammation were ***:All the 96 patients completed the 84-day follow-up from January 21 to March 28,*** the 84th day of follow-up,respiratory symptoms were less than 5%.There was no significant difference in the improvement rates of symptoms,including fatigue,sputum,cough,dry throat,thirst,and upset,between the two groups(P>0.05).Totally 82 patients(85.42%)showed complete lung inflammation absorption at the 84-day *** day 14,the CM group had a significantly higher absorption rate than the control group(P<0.05)and the relative risk of absorption for CM *** group was 3.029(95%confidence interval:1.026-8.940).The proportions of CM syndrome types changed with time prolonging:the proportion of the pathogen residue syndrome gradually decreased,and the proportion of both qi and yin deficiency syndrome gradually ***:Patients with COVID-19 in convalescence had symptoms and lung inflammation after hospital discharge and recovered with time *** could improve lung inflammation for early *** types of CM syndrome can be transformed wi

关键词： COVID-19 convalescent patient Chinese medicine syndrome evolution pneumonia absorption

Numerical study of creep effect on purging plug performance under cyclic service

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2022年第7期29卷 1119-1128页

作者： Fang-guan Tan Sheng-li Jin Zhu He Xiong liang Ya-wei li Jing li The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina National-Provincial Joint Engineering Research Center of High Temperature Materials and lining Technology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Chair of Ceramics Montanuniversitaet Leoben8700 LeobenAustria The Key Laboratory of Chemical Metallurgy Engineering of liaoning Province and School of Materials and Metallurgy University of Science and Technology LiaoningAnshan 114051LiaoningChina

The service life of the purging plug is one of the fundamental factors that determine the downtime and usage efficiency of the whole *** creep behaviour of the purging plug was thus investigated to identify the possible failure *** first,the creep parameters of the Norton–Bailey strain hardening rule were inversely identified via the results of the creep ***,the thermal-solid coupling model approach was employed to predict the creep behaviour of the purging plug,in which the Norton–Bailey strain hardening rule was *** numerical results show that the temperature of the purging plug presents a cyclic trend after the first service period since the preheating temperature is lower than the temperature of molten ***,the distribution of the creep strain intensity in a layered form could also contribute to a gradual spalling of the purging plug end in ***,the creep strain concentration around the slit can be responsible for the clogging of the purging plug.

关键词： Strain hardening Creep test Creep deformation Purging plug Castable corundum