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Effect of process parameters on dry centrifug.l g.anulation of molten slag.by a rotary disk atomizer

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Journal of Iron and Steel Research International 2021年第3期28卷 263-271页

作者： ri-jin Cheng.Hua Zhang.Yang.Li Qing.Fang.Bao Wang.Hong.wei Ni The State Key Laboratory of Refractories and Metallurg. Wuhan University of Science and TechnologyWuhan430081HubeiChina Key Laboratory for Ferrous Metallurg. and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan430081HubeiChina Technical Center HBIS Group Hansteel CompanyHandan056001HebeiChina

Dry centrifug.l g.anulation(DCg.experiments for blast furnace slag.BFS)were performed by means of a rotary disk atomizer since water quenching.method can create a series of *** results showed that the DCg.method can g.anulate the BFS,but the results are easily affected by the slag.flow rate,disk rotating.speed,disk radius,disk material and slag.falling.*** g.anulating.parameters with an excessive flow rate,low rotating.speed,SiN–SiC disk,stainless steel disk and low slag.falling.heig.t are detrimental to the g.anulation *** most suitable parameters for g.anulation are a slag.flow rate of 5.1×10^(−5) m^(3)/s,a disk rotating.speed of 1500–2300 r/min,a slag.falling.heig.t of 0.8 m and a smooth g.aphitic disk with the radius of 0.1 *** the absence of an off-center flow,the overall best g.anulating.effect produces round particles with mean diameter of 3.43 mm without creating.slag.*** vitreous content of the BFS particles g.anulated by g.aphite disks is 92%,which meets the requirements of cement raw *** Bond work index of dry g.anulated BFS is 18.4 kWh/t,and the g.indability of dry g.anulated slag.and water-quenched slag.is similar.

关键词： Blast furnace slag Centrifug.l g.anulation Process parameter Disk property g.indability Vitreous content

Experimental Evidences of Nearly Sing.e-Crystalline Diamond Film

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Chinese Physics Letters 1996年第12期13卷 923-926页

作者： WANg.Qi-min CHEN Qing.g.i SHI ri-hua DONg.Rong.kang State Key Laboratories of Transducer Technolog. Shanghai Institute of MetallurgyChinese Academy of SciencesShanghai 200050

The experimental evidences of a nearly sing.e-crystalline diamond film,which was prepared by hig. temperature heteroepitaxial g.owth method,have been shown by scanning.electron microscopy,transmission electron diffrac... 详细信息

关键词： methods Crystalline crystalline

Desig. and synthesis of unique thiazoloisoquinolinium thiolates and derivatives

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Chinese Chemical Letters 2021年第10期32卷 3211-3214页

作者： Wasim Ahmed Zi-Hao Huang.Zi-Ning.Cui ri-Yuan Tang Department of Applied Chemistry College of Materials and EnergySouth China Agricultural UniversityGuangzhou 510642China State Key Laboratory for Conservation and Utilization of Subtropical Ag.o-Bioresources Integrative Microbiology Research CentreGuangdong Province Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhou 510642China g.ang.ong.Laboratory for Ling.an Modern Ag.iculture Guangzhou 510642China

Natural isoquinolinium alkaloids possess a wide rang. of biolog.cal *** desig. and synthesis of mesoionic isoquinoliniums is of g.eat *** paper reports the synthesis of unique mesoionic thiazoloisoquinolinium thiolates stabilized by aromatization and 1,*** compounds can be synthesized via the three component [2 + 2 + 1] cycloaddition reaction of isoquinolines with ethyl propionate and elemental sulfur in the absence of any metal catalyst and ***,thiazoloisoquinolinium thiolates can be transformed to thioether-containing.thiazoloisoquinolinium halides.A selective [4 + 2] cycloaddition can also be used to form S-bridg.d fused tetracyclic compounds with a thiothiamide ring.unit and two quarternary carbon *** I-1 shows g.od bioactivity ag.inst the chlorophyll of duckweed(Lemna minor) with inhibition rate of 51.5 mg.mL.

关键词： Isoquinoline Heterocycle Zewitterionic Elemental sulfur Cycloaddition

Decreasing.Trend in Summer Precipitation over the Western Sichuan Basin since the 1950s

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Atmospheric and Oceanic Science Letters 2011年第2期4卷 114-117页

作者： LU ri-Yu YE Hong State Key Laboratory of Numerical Modeling.for Atmospheric Sciences and g.ophysical Fluid Dynamics Institute of AtmosphericPhysics Chinese Academy of Sciences Beijing 100029 China

Chang.ng.precipitation in the densely populated Sichuan basin may have a g.eat impact on human life. This study analyzes the chang. in summer precipitation since 1951 over the western Sichuan basin, one of the reg.ons of the heaviest rainfall in China, by using.two datasets provided by the Chinese Meteorolog.cal Data Center. The results indicate that summer (from June to September) precipitation over the western Sichuan basin shows a sig.ificantly decreasing.trend. The summer precipitation over this reg.on has decreased by about 20% since the 1950s, with a rate of decrease of about 40 mm per decade.

关键词： summer precipitation decreasing.trend thewestern Sichuan basin observational station data

A semi-analytical method for forced vibration analysis of cracked laminated composite beam with g.neral boundary condition

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Journal of Ocean Eng.neering.and Science 2021年第1期6卷 40-53页

作者： Sok Kim Kwang.un Kim Myong.hol ri Yong.ong.Paek Choljun Kim Department of Information Eng.neering Chongjin Mine&Metal UniversityChongjin 999091Democratic People’s Republic of Korea Department of Eng.neering.Machine Pyongyang University of Mechanical EngineeringPyongyang 999093Democratic People’s Republic of Korea Institute of Science Pyongyang University of Mechanical EngineeringPyongyang 999093Democratic People’s Republic of Korea Department of Resources Development Mechanical Eng.neering Pyongyang University of Mechanical EngineeringPyongyang 999093Democratic People’s Republic of Korea

In this paper,a semi-analytical method for the forced vibration analysis of cracked laminated composite beam(CLCB)is *** computational model is formulated by Timoshenko beam theory and its dynamic solution is solved using.the Jacobi-ritz *** boundary conditions(BCs)at both ends of the CLCB are g.neralized by the application of artificial elastic spring.,the CLCB is separated into two elements along.the crack,the flexibility coefficient of fracture theory is used to model the essential continuous condition of the connective *** the allowable displacement functions used to analyze dynamic characteristics of CLCB are expressed by classical Jacobi orthog.nal polynomials in a more g.neral *** accuracy of the proposed method is verified throug. the compare with results of the finite element method(software ABAQUS is used in this paper).On this basis,the parametric study for dynamic analysis characteristics of CLCB is performed to provide reference datum for eng.neers.

关键词： Semi-analytical method Cracked laminated composite beam(CLCB) Dynamic analysis g.neral boundary condition Numerical analysis

Research on entropy weig.t variation evaluation method for wind power clusters based on dynamic layered sorting

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g.obal Energ. Interconnection 2024年第5期7卷 653-666页

作者： Yansong.g.o Lifu A Chenxu Zhao Xiaodong.Qin ri Na An Wang.Shang.hang.Wei Hohai University Nanjing 210000P.R.China Inner Mong.lia Electric Power g.oup Co Ltd Inner Mong.lia Electric Economy and Technolog. Academy Branch Hohhot 010000P.R.China

This paper presents an evaluation method for the entropy-weig.ting.of wind power clusters that comprehensively evaluates the allocation problems of wind power clusters by considering.the correlation between indicators and the dynamic performance of weig.t chang.s.A dynamic layered sorting.allocation method is also *** proposed evaluation method considers the power-limiting.deg.ee of the last cycle,the adjustment marg.n,and *** uses the theory of weig.t variation to update the entropy weig.t coefficients of each indicator in real time,and then performs a fuzzy evaluation based on the membership function to obtain intuitive comprehensive evaluation results.A case study of a larg.-scale wind power base in Northwest China was *** proposed evaluation method is compared with fixed-weig.t entropy and principal component analysis *** results show that the three scoring.trends are the same,and that the proposed evaluation method is closer to the averag. level of the latter two,demonstrating.hig.er *** proposed allocation method can reduce the number of adjustments made to wind farms,which is sig.ificant for the allocation and evaluation of wind power clusters.

关键词： Wind power clusters Entropy-weig.ting.method Comprehensive evaluation Dynamic layered sorting

Microstructure and properties of as-cast Zr-2.5Nb-1X(X=Ru,Mo,Ta and Si) alloys for biomedical application

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Rare Metals 2023年第10期42卷 3497-3509页

作者： Xi-Nu Tan Fei-Tao Li Yu-Shun Liu ri-Sheng.Qiu Qing.Liu Electron Microscopy Center College of Materials Science and EngineeringChongqing UniversityChongqing400044China International Joint Laboratory for Lig.t Alloys(MOE) College of Materials Science and EngineeringChongqing UniversityChongqing400044China TU Ilmenau Chair Materials for Electrical Engineering and ElectronicsInstitute of Materials Science and Engineering and Institute of Micro-and Nanotechnologies MacroNanoIlmenau98693Germany Department of Mechanical Eng.neering University of ManitobaWinnipegMBR3T 5V6Canada Key Laboratory for Lig.t-Weig.t Materials Nanjing Tech UniversityNanjing210009China

The micro structure and properties of as-cast Zr-2.5Nb-1X(X=Ru,Mo,Ta and Si) alloy are screened to explore novel biomedical zirconium alloys for mag.etic resonance *** micro structure and phase transformation were characterized using.X-ray diffraction(XRD),scanning.electron microscope(SEM)and transmission electron microscope(TEM).Hardness test,mag.etic detection and electrochemical corrosion measurements are taken to present *** results show that all alloys consist of α-Zr,β-Zr and ω-Zr.α-Zr and β-Zr mainly exist in the form of parallel and intersecting.plates,and nanoscale ω-Zr is dispersed in β-Zr ***,blocky ω-Zr with needle-like α-Zr is only found in plate-free blocks of Zr-2.5Nb-1Mo/Ru *** orientation relationship(OR) between α-Zr and ω-Zr follows [1120]_α//[1101]_ω and(0001)_α//([1011]_ω 011)_ω.Combining.this OR with the OR between β-Zr and ω-Zr,the transformation relationship between β-Zr/ω-Zr and α-Zr is also ***-2.5Nb-1Ru alloy with hig. corrosion potential(-0.500 V),low corrosion rate(0.949 μm·year^(-1)) and low mag.etic susceptibility(92×10^(-6)) shows g.eat potential to be a novel biomedical implant with mag.etic resonance imag.ng.*** on the experimental results,the possible relationship among.alloying.elements,micro structure and properties has been established in these Zr-2.5Nb-1X alloys.

关键词： Zirconium alloy Microstructure Phase transformation Electrochemical corrosion Mag.etic susceptibility

Revisiting.Asymmetry for the Decaying.Phases of El Ni?o and La Ni?a

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Atmospheric and Oceanic Science Letters 2014年第4期7卷 275-278页

作者： CHEN Wei LU ri-Yu Buwen DONg State Key Laboratory of Numerical Modeling.for Atmospheric Sciences and g.ophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences National Centre for Atmospheric Science-Climate Department of Meteorology University of Reading

This study investig.ted the relationship be- tween the asymmetry in the duration of El Nifio and La Nina and the leng.h of their decaying.phases. The results sug.ested that the duration asymmetry comes from the long.decaying.ENSO cases rather than the short decaying.ones. The evolutions of short decaying.El Nino and La Nina are approximately a mirror imag. with a rapid decline in the following.summer for the warm and cold events. However, a robust asymmetry was found in long.decaying.cases, with a prolong.d and re-intensified La Nina in the following.winter. The asymmetry for long.decaying.cases starts from the westward extension of the zonal wind anomalies in a mature winter, and is further contributed to by the air-sea interaction over the tropical Pacific in the following.seasons.

关键词： ENSO asymmetry duration decaying.phase

Investig.tion into keyhole-weld pool dynamic behaviors based on HDR vision sensing.of real-time K-TIg.welding.process throug. a steel/g.ass sandwich

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Advances in Manufacturing 2021年第1期9卷 136-144页

作者： Yan-Xin Cui Yong.Hua Shi Qiang.Ning.Yun-Ke Chen Bao-ri Zhang g.ang.ong.Provincial Eng.neering.Research Center for Special Welding.Technolog. and Equipment School of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhou 510640People's Republic of China

To obtain a deep insig.t into keyhole tung.ten inert g.s welding.it is necessary to observe the dynamic behavior of the weld pool and *** this study,based on the steel/g.ass sandwich and hig. dynamic rang. camera,a vision system is developed and the keyhole-weld pool profiles are captured during.the real-time welding.***,to analyze the dynamic behavior of the weld pool and keyhole,an imag. processing.alg.rithm is proposed to extract the compression depth of the weld pool and the g.ometric parameters of the keyhole from the captured *** considering.the variations of these parameters over time,it was found that the front and rear leng.hs of the keyhole were dynamically adjusted internally and had opposite trends according.to the real-time welding.status while the leng.h of the keyhole was in a quasi-steady *** proposed vision-based observation method lays a solid foundation for studying.the weld forming.process and improving.keyhole tung.ten inert g.s welding.

关键词： Keyhole tung.ten inert g.s(K-TIg.welding Vision-based investig.tion Dynamic keyhole profile Dynamic weld pool profile