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jVSL球团厂的最佳操作实践

JVSL球团厂的最佳操作实践

中国金属学会2003中国钢铁年会

作者： j.k.tandon j.P.N.Lal L.D.Saralaya Gururaj Prasad 高斌

jVSL是一个年产160万t的联合炼钢厂,其炼铁系统装备有高标准的COREX技术。jVSL球团厂是世界上惟一一家使用低发热值燃料——Corex煤气生产优质球团用于内需和出口。当地可利用的铁矿石基本属于高脉石含量的铁矿。用这种矿石生产球团是... 详细信息

jVSL是一个年产160万t的联合炼钢厂,其炼铁系统装备有高标准的COREX技术。jVSL球团厂是世界上惟一一家使用低发热值燃料——Corex煤气生产优质球团用于内需和出口。当地可利用的铁矿石基本属于高脉石含量的铁矿。用这种矿石生产球团是一个艰巨的任务。在jVSL,我们运用最佳操作,已经掌握了利用高脉石含量的铁矿生产优质球团的技术。

关键词：废物利用修正 Corex 操作实践高铝矿优化过程参数

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炼钢领域新思维在jVSL的体现

炼钢领域新思维在JVSL的体现

中国金属学会2003中国钢铁年会

作者： j.k.tandon j.P.N.Lal P.Sasindran VVS.Raju IAk Prakash jindal Vijayanagar Steels Limited ToranagalluKarnatakaINDIA jindal Vijayanagar Steels Limited ToranagalluKarnatakaINDIA jindal Vijayanagar Steels Limited ToranagalluKarnatakaINDIA jindal Vijayanagar Steels Limited ToranagalluKarnatakaINDIA jindal Vijayanagar Steels Limited ToranagalluKarnatakaINDIA

jindal Vijayanagar（jVSL）钢铁有限公司是一个采用Corex技术,年生产能力为160万t的钢铁联合企业。jVSL邻近高品质铁矿,具有良好的后勤保障体系,为了提高公司的整体运行水平采用了许多非常规手段。通过采用一些大刀阔斧的改革,jVSL公...

jindal Vijayanagar（jVSL）钢铁有限公司是一个采用Corex技术,年生产能力为160万t的钢铁联合企业。jVSL邻近高品质铁矿,具有良好的后勤保障体系,为了提高公司的整体运行水平采用了许多非常规手段。通过采用一些大刀阔斧的改革,jVSL公司在短短的4年间跃升到印度钢铁工业中令人羡慕的位置。炼钢厂拥有2座转炉和2台连铸机,年生产160万t钢,不久的将来年生产能力将达到250万t。全世界范围的废钢短缺迫使jVSL公司寻找可替代废钢的冷料,并在短期内完善了直接还原铁（DRI）在转炉炼钢中的应用技术。耐火材料供应商娴熟的管理能力与jVSL公司炼钢生产的密切配合创造了许多耐材管理领域的奇迹。jVSL开始了一个雄心勃勃的计划——提高转炉炉龄到5000炉次。目前jVSL公司转炉的金属收得率为90%,连铸生产的收得率为98.45%。公司内部的技术革新一直是公司不断进步的推动力。技术革新包括采用自动化操作,开发中间包升降自动调整,结晶器热成像技术等。随着对炼钢和铸造生产各方面最佳操作的持续探索,公司开发了质量预测保障计划,在铸造生产中任何引起不稳定生产的异常行为都将被检测并提请立即进行观察。为了与时俱进,jVSL在废料控制和利用方面采取了一系列措施。通过对转炉生产和连铸生产废料的利用,jVSL公司的废料利用率超过80%。

关键词：

采用板坯热装热送生产工艺提高生产率及节约能源

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采用板坯热装热送生产工艺提高生产率及节约能源

中国金属学会2003中国钢铁年会

作者： j.k.tandon j.P.N.Lal A.k.Aggarwal P.Sasindran D.k Tripathi 魏军 jindal Vijay Nagar Steel Limited INDIA

jVSL厂安装了热装热送生产线,以满足产品质量的不断提高、价格竞争的日趋激烈及按需供货的需求。2002年6月,自从该生产线在印度的,jindal Nagar钢铁有限公司投入使用后,提高了生产率,降低了能源消耗。jVSL炼钢厂有两台连铸机,热轧带钢... 详细信息

jVSL厂安装了热装热送生产线,以满足产品质量的不断提高、价格竞争的日趋激烈及按需供货的需求。2002年6月,自从该生产线在印度的,jindal Nagar钢铁有限公司投入使用后,提高了生产率,降低了能源消耗。jVSL炼钢厂有两台连铸机,热轧带钢厂有一座250t/h加热炉,一条长为80mtr辊道,两个可旋转90°的滚动辊道将连铸机生产的板坯运送到热装辊道。把板坯提升到热轧厂加热炉辊道和一个提升装置已经安装完毕。所有的设备运行良好,这篇文章介绍了设备的安装和优点。

关键词： hot charging slab turn table hot box elevator and hot charging table

Insm1:orchestrating cellular mimicry in the thymus medulla

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Cellular & Molecular Immunology 2024年第4期21卷 414-416页

作者： k.D.james j.E.Cowan UCL Institute of Immunity and Transplantation The Pears BuildingRowland Hill StreetLondonNW32PPUK

The thymus is the primary production site for a functional and self-tolerant T-cell *** establishment of immune tolerance is mediated by the generation and presentation of tissue-restricted self-antigens(TRAs)by medullary thymic epithelial cells(mTECs),which screen T-cell receptors for self-reactivity to eliminate autoreactive T *** studies have extended our understanding of mTEC heterogeneity by examining the mechanisms by which mTECs mimic the peripheral self[1].

关键词： medullary eliminate restricted

Use of donepezil for neurocognitive recovery after brain injury in adult and pediatric populations:a scoping review

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Neural Regeneration Research 2024年第8期19卷 1686-1695页

作者： Avery L.Miller Nathan k.Evanson j.Michael Taylor University of Cincinnati College of Medicine CincinnatiOHUSA Department of Pediatrics University of CincinnatiCincinnatiOHUSA Department of Neurology and Rehabilitation Medicine University of CincinnatiCincinnatiOHUSA Division of Pediatric Rehabilitation Medicine Cincinnati Children’s Hospital Medical CenterCincinnatiOHUSA Division of Neurology Cincinnati Children’s Hospital Medical CenterCincinnatiOHUSA

There are few pharmacologic options for the treatment of cognitive deficits associated with traumatic brain injury in pediatric *** inhibitors such as donepezil have been evaluated in adult patients after traumatic brain injury,but relatively less is known about the effect in pediatric *** goal of this review is to identify knowledge gaps in the efficacy and safety of acetylcholinesterase inhibito rs as a potential a djuvant treatment fo r neurocognitive decline in pediatric patients with traumatic brain *** queried PubMed to identify literature published from database inception thro ugh june 2023 desc ribing the use of donepezil in young adult traumatic brain injury and pediatric patients with predefined *** on preselected search criteria,340 unique papers we re selected for title and abstra ct ***-two reco rds were reviewed in full after eliminating preclinical studies and pape rs outside the scope of the *** adult traumatic brain injury,we review results from 14 papers detailing 227 subjects where evidence suggests donepezil is well tole rated and shows both objective and patient-reported efficacy for reducing cognitive *** children,3 pape rs report on 5 children recovering from traumatic brain injury,showing limited *** additional 15 pediatric studies conducted in populations at risk for cognitive dysfunction provide a broader look at safety and efficacy in 210 patients in the pediatric age *** its promise for efficacy in adults with traumatic brain injury and tole rability in pediatric patients,we believe further study of donepezil for children and adolescents with traumatic brain injury is warranted.

关键词： acetylcholinesterase inhibitor adult cognition donepezil pediatrics traumatic brain injury

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Supposition of graphene stacks to estimate the contact resistance and conductivity of nanocomposites

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Applied Mathematics and Mechanics(English Edition) 2024年第4期45卷 663-676页

作者： Y.ZARE M.T.MUNIR G.j.WENG k.Y.RHEE Biomaterials and Tissue Engineering Research Group Department of Interdisciplinary TechnologiesBreast Cancer Research CenterMotamed Cancer InstituteTehran ***Iran College of Engineering and Technology American University of the Middle EastEgaila 54200Kuwait Department of Mechanical and Aerospace Engineering Rutgers UniversityNew BrunswickNJ 08903U.S.A. Department of Mechanical Engineering(Bk21 Four) College of EngineeringKyung Hee UniversityYongin 446701Republic of Korea

In this study,the effects of stacked nanosheets and the surrounding interphase zone on the resistance of the contact region between nanosheets and the tunneling conductivity of samples are evaluated with developed equations superior to those previously *** contact resistance and nanocomposite conductivity are modeled by several influencing factors,including stack properties,interphase depth,tunneling size,and contact *** developed model's accuracy is verified through numerous experimental *** further validate the models and establish correlations between parameters,the effects of all the variables on contact resistance and nanocomposite conductivity are ***,the contact resistance is primarily dependent on the polymer tunnel resistivity,contact area,and tunneling *** dimensions of the graphene nanosheets significantly influence the conductivity,which ranges from 0 S/m to90 S/*** increased number of nanosheets in stacks and a larger gap between them enhance the nanocomposite's ***,the thicker interphase and smaller tunneling size can lead to higher sample conductivity due to their optimistic effects on the percolation threshold and network efficacy.

关键词： graphene polymer composite stacked nanosheet tunneling conductivity contact resistance interphase

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Photon orbits and phase transition for Letelier AdS black holes immersed in perfect fluid dark matter

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Chinese Physics C 2024年第6期48卷 247-259页

作者： Ashima Sood Md Sabir Ali j.k.Singh Sushant G.Ghosh Department of Mathematics Netaji Subhas University of TechnologyNew Delhi-110078India Centre for Theoretical Physics Jamia Millia IslamiaNew Delhi 110025India Department of Physics Mahishadal Raj CollegePurba MedinipurWest Bengal721628India Institute of Theoretical Physics&Research Center of Gravitation Lanzhou UniversityLanzhou 730000China key Laboratory of Quantum Theory and Applications of MoE Lanzhou UniversityLanzhou 730000China Lanzhou Center for Theoretical Physics&key Laboratory of Theoretical Physics of Gansu Province Lanzhou UniversityLanzhou 730000China Astrophysics and Cosmology Research Unit School of MathematicsStatistics and Computer ScienceUniversity of KwaZulu-NatalPrivate Bag X54001Durban 4000South Africa

We obtain an exact solution for spherically symmetric Letelier AdS black holes immersed in perfect fluid dark matter(PFDM).Considering the cosmological constant as the positive pressure of the system and volume as its conjugate variable,we analyze the thermodynamics of our black holes in the extended phase *** to the background clouds of strings parameter(a)and the parameter endowed with PFDM(β),we analyze the Hawking temperature,entropy,and specific ***,we investigate the relationship between the photon sphere radius and phase transition for the Letelier AdS black holes immersed in *** the analysis,with a particular condition,non-monotonic behaviors are found between the photon sphere radius,impact parameter,PFDM parameter,temperature,and *** can regard the changes in both the photon sphere radius and impact parameter before and after phase transition as the order parameter;their critical exponents near the critical point are equal to the same value,1/2,similar to that in ordinary thermal *** indicates that a universal relation of gravity may exist near the critical point for a black hole thermodynamic system.

关键词： AdS black holes perfect fluid dark matter Letelier spacetime photon orbit extended phase space thermodynamics correlation of photon orbit and thermodynamics

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Bayesian inference-based wear prediction method for plain bearings under stationary mixed-friction conditions

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Friction 2024年第6期12卷 1272-1282页

作者： Florian kÖNIG Florian WIRSING Georg jACOBS Rui HE Zhigang TIAN Ming j.ZUO Institute for Machine Elements and Systems Engineering RWTH Aachen UniversityAachen 52062Germany Department of Mechanical Engineering University of AlbertaEdmonton T6G1H9Canada Qingdao International Academician Park Research Institute Qingdao 266000China

This study introduces a method to predict the remaining useful life(RUL)of plain bearings operating under stationary,wear-critical *** this method,the transient wear data of a coupled elastohydrodynamic lubrication(mixed-EHL)and wear simulation approach is used to parametrize a statistical,linear degradation *** method incorporates Bayesian inference to update the linear degradation model throughout the runtime and thereby consider the transient,system-dependent wear progression within the RUL prediction.A case study is used to show the suitability of the proposed *** results show that the method can be applied to three distinct types of post-wearing-in behavior:wearing-in with subsequent hydrodynamic,stationary wear,and progressive wear *** hydrodynamic operation leads to an infinite lifetime,the method is successfully applied to predict RUL in cases with stationary and progressive wear.

关键词： plain bearings wear modeling remaining useful life prediction Bayesian inference

Sequential good lattice point sets for computer experiments

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Science China Mathematics 2024年第9期67卷 2153-2170页

作者： Xue-Ru Zhang Yong-Dao Zhou Min-Qian Liu Dennis k.j.Lin NITFID LPMC & KLMDASR School of Statistics and Data Science Nankai University Department of Statistics Purdue University

Sequential Latin hypercube designs(SLHDs) have recently received great attention for computer experiments, with much of the research restricted to invariant spaces. The related systematic construction methods are inflexible, and algorithmic methods are ineffective for large designs. For designs in contracting spaces, systematic construction methods have not been investigated yet. This paper proposes a new method for constructing SLHDs via good lattice point sets in various experimental spaces. These designs are called sequential good lattice point(SGLP) sets. Moreover, we provide efficient approaches for identifying the(nearly)optimal SGLP sets under a given criterion. Combining the linear level permutation technique, we obtain a class of asymptotically optimal SLHDs in invariant spaces, where the L1-distance in each stage is either optimal or asymptotically optimal. Numerical results demonstrate that the SGLP set has a better space-filling property than the existing SLHDs in invariant spaces. It is also shown that SGLP sets have less computational complexity and more adaptability.

关键词： contracting space maximin distance nested Latin hypercube design sequential design space-filling design

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