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Genetic optimization of ladle scheduling in empty-ladle operation stage based on temperature drop control

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Journal of Iron and Steel Research International 2022年第4期29卷 563-574页

作者： Yu-jie hong Qing Liu jian-ping yang jian Wang Shan Gao hong-hui Li State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Laiwu Iron and Steel Group Yinshan Section Steel Co.Ltd.Laiwu 271100ShandongChina

To optimize ladle scheduling in the empty-ladle operation stage of steel plants,a mathematical scheduling model was established for the empty-ladle operation stage,taking the minimum total waiting time in the empty-ladle operation stage as the optimization goal and setting the equipment assignment uniqueness as the key *** improved genetic algorithm was designed to calculate the mathematical scheduling *** the operation of the genetic algorithm,the strategy of"ladle temperature drop control"was adopted to solve the problem of equipment conflicts and reduce unreasonable ladle temperature drops to enhance"red-ladle"*** main production modes operating at 95%capacity in a Chinese steel plant were simulated using the genetic optimization *** results showed that the genetic optimization model could improve the efficiency of ladle operation and reduce the total waiting time in the empty-ladle operation stage by 868–1147 min.

关键词： Ladle scheduling Empty-ladle operation Waiting time Genetic algorithm Temperature drop

Spin transport properties in ferromagnet/superconductor junctions on topological insulator

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Chinese Physics B 2022年第12期31卷 485-488页

作者： hong Li Xin-jian yang College of Science China University of PetroleumQingdao 266580China

The spin-dependent Andreev reflection is investigated theoretically by analyzing the electronic transport in a thin-film topological insulator(TI)ferromagnet/superconductor(FM/SC)*** tunneling conductance and shot noise are calculated based on the Dirac-Bogoliubov-de Gennes equation and Blonder-Tinkham-Klapwijk *** is found that the magnetic gap in ferromagnet can enhance the Andreev retro-reflection but suppress the specular Andreev *** gate potential applied to the electrode on top of superconductor can enhance the two types of *** is a transition between the two types of reflections at which both the tunneling conductance and differential shot noise become *** results provide a method to realize and detect experimentally the intra-band specular Andreev reflection in thin film TI-based FM/SC structures.

关键词： TI-based FM/SC junctions magnetic gap effect Andreev retro-reflection specular Andreev reflection

Effect of patterned hydrodynamic slip on electromagnetohydrodynamic flow in parallel plate microchannel

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Chinese Physics B 2020年第11期29卷 308-314页

作者： Chun-hong yang Yong-Jun jian School of Mathematical Science Inner Mongolia UniversityHohhot 010021China

A fully developed electromagnetohydrodynamic(EMHD) flow through a microchannel with patterned hydrodynamic slippage on the channel wall is studied. The flow is driven by the Lorentz force which originates from the interaction between an externally imposed lateral electric field and a perpendicular magnetic field. The governing equations for the velocity with patterned slip boundary conditions are solved analytically by perturbation techniques under the assumption of small Reynolds number Re. In addition, the numerical solutions for the velocity are obtained by using the finite-difference method, and they are found to be in good agreement with the analytical solutions within admissible parameter range. The effects of different parameters on the velocity and volume flow rate due to patterned hydrodynamic slippage are discussed in detail, including wave-number K, Hartmann number Ha, amplitude δ of the patterned slip length, and normalized electric field strength S. The results show that patterned slippage over microchannel walls can induce transverse flows, which will increase the mixing rates in microfluidic devices. In addition, we also find that precise flow control can be achieved by controlling the magnetic flux and the wave-number and also by well choosing the electric field intensity. Our analysis can be used for designing the efficient micro-fluidic mixers.

关键词： electromagnetohydrodynamic(EMHD)flow patterned slip wall

Effect of Ti Additions on Mechanical and Thermodynamic Properties of W-Ti Alloys: A First-principles Study

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 246-257页

作者： ZHANG jian NIE Wei HUANG Jin ZHU Ke LIU Ruxia ZHANG Ruizhi LUO Guoqiang SHEN Qiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China

The mechanical and thermodynamic properties of W-Ti alloys(including W_(15)Ti_(1),W_(14)Ti_(2),W_(12)Ti_(4) and W_(8)Ti_(8) alloys)were investigated by the first-principles approach based on density functional *** results indicate that W-Ti alloys except W_(8)Ti_(8) are thermodynamically *** modulus and hardness of W-Ti alloys are smaller than those of pure tungsten and gradually decrease with increasing Ti ***,their B/G ratios and Poisson's ratios exceed those of pure tungsten,suggesting that the introduction of Ti decreases the mechanical strength while enhancing the ductility of W-Ti *** thermal expansion coefficients for W-Ti alloys all surpass those of pure tungsten,indicating that the introduction of titanium exacerbates the thermal expansion behavior of W-Ti ***,elevated pressure has the capacity to suppress the thermal expansion tendencies in titanium-doped tungsten *** study offers theoretical insights for the design of nuclear materials by exploring the mechanical and thermodynamic properties of W-Ti alloys.

关键词： first-principles mechanical properties thermodynamic properties tungsten-titanium alloys

Secure Channel Estimation Using Norm Estimation Model for 5G Next Generation Wireless Networks

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Computers, Materials & Continua 2025年第1期82卷 1151-1169页

作者： Khalil Ullah Song jian Muhammad Naeem Ul Hassan Suliman Khan Mohammad Babar Arshad Ahmad Shafiq Ahmad Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming650500China Department of Computer Science Abbottabad University of Science and TechnologyHavelianAbbottabad22500Pakistan Department of Computing and Electronics Engineering Middle East CollegeMuscat124Oman Department of CS&IT Pak-Austria Fachhochschule Institute of Applied Sciences and Technology MangHaripur22621Pakistan Industrial Engineering Department College of EngineeringKing Saud UniversityRiyadh11421Saudi Arabia

The emergence of next generation networks(NextG),including 5G and beyond,is reshaping the technological landscape of cellular and mobile *** networks are sufficiently scaled to interconnect billions of users and *** in academia and industry are focusing on technological advancements to achieve highspeed transmission,cell planning,and latency reduction to facilitate emerging applications such as virtual reality,the metaverse,smart cities,smart health,and autonomous *** continuously improves its network functionality to support these *** input multiple output(MIMO)technology offers spectral efficiency,dependability,and overall performance in *** article proposes a secure channel estimation technique in MIMO topology using a norm-estimation model to provide comprehensive insights into protecting NextG network components against adversarial *** technique aims to create long-lasting and secure NextG networks using this extended *** viability of MIMO applications and modern AI-driven methodologies to combat cybersecurity threats are explored in this ***,the proposed model demonstrates high performance in terms of reliability and accuracy,with a 20%reduction in the MalOut-RealOut-Diff metric compared to existing state-of-the-art techniques.

关键词： Next generation networks massive mimo communication network artificial intelligence 5G adversarial attacks channel estimation information security

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异组分并捻丝的力学性能分析

丝绸 2002年第5期39卷 39-41页

作者：杨旭红杨建慧宋曙明周金华苏州大学材料工程学院江苏苏州215021 江苏省丝绸学校江苏苏州215008

利用并捻法将性能各不相同的几种长丝纱组合起来 ,研究并捻捻度和超喂对异组分并捻丝强度和伸长的影响。

关键词：超喂强度伸长捻度异组分并捻丝力学性能分析

Synthesis, Crystal Structure and Antibacterial Activities of 3-[3-Methyl-(2-thienyl)methyl- enehydrazinocarbonyl]-(1H)-1,2,4-triazole

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1286-1289页

作者： yang jian-Guo PAN Fu-You SHAO hong Office of Assets Administration Taizhou University Zhejiang 317000 China Department of Chemistry Taizhou University Zhejiang 317000 China

The title compound, C9H9N5OS, was synthesized by the reaction of 3-（1H）-1,2,4 -triazole hydrazine with 3-methyl-2-thiophenecarboxaldehyde in ethanol. The single crystal structure has been determined by X-ray diffraction analysis. The crystal belongs to monoclinic system, space group P2 1/n with a = 9.5550（10）, b = 11.9847（12）, c = 10.1074（11） A,β= 112.995（2）° V= 1065.47（19） A^3, Z = 4,μ = 0.290 mm^-1, Mr= 235.27, Dc = 1.467 g/cm^3 and F（000） = 488. The structure was solved by direct methods and refined to R = 0.0449. The crystal structure involves intermolecular hydrogen bonds of N-H…O and N-H…N as well as intramolecular hydrogen bond of N-H…N. Its biological activity has also been determined showing this type of compounds has certain antibacterial activity.

关键词： synthesis crystal structure antibacterial activities (1H)-1,2,4-triazole

Kinetics and mechanism of coal-based direct reduction of highchromium vanadium-titanium magnetite

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Journal of Iron and Steel Research International 2022年第11期29卷 1723-1733页

作者： jian yang Tao jiang Shi-hong Ma Song-tao yang Mi Zhou School of Information Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina School of Materials and Metallurgy University of Science and Technology LiaoningAnshan 114051LiaoningChina

High-chromium vanadium-titanium magnetite(HCVTM)is a valuable resource containing metal elements such as iron,vanadium,titanium,and *** recycle these elements,direct reduction is an efficient *** mechanism and reaction kinetic parameters for the direct reduction of HCVTM were *** results show that the reduction degree increases obviously when the C/O ratio and temperature *** analysis showed a dramatic mass loss in the direct reduction of HCVTM in the temperature range of 985-1160℃.From 1200 to 1350℃,the reduction curves for the isothermal reduction of HCVTM followed the same trend,with a sharp increase in the initial reaction zone and a slight increase in the reduction rate with increasing time,and finally,the isothermal reduction process of HCVTM was divided into several limiting stages with varying degrees,with inconsistent limiting factors for the reaction rate at different *** results also show that the activation energy decreases slightly at larger degrees of ***,the apparent rate constant k(T)increased with increasing reduction temperature,with lnk(T)showing a good linear relationship with temperature.

关键词： High-chromium vanadium-titanium magnetite Direct reduction Reduction rate Kinetic Thermodynamic Analysis

Corrosion and wear resistance behaviors of electroless Ni-Cu-P-TiN composite coating

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Rare Metals 2022年第9期41卷 3233-3238页

作者： hong-Ming Zhou yang Jia jian Li Shu-Heng Yao School of Materials Science and Engineering Central South UniversityChangsha410083China Hunan Zhengyuan Institute for Energy Storage Materials and Devices Changsha410083China

Composite coating of Ni-Cu-P alloys containing TiN particles was prepared by electroless technique based on the excellent wear resistance of TiN and better anti-corrosion property of electroless Ni-Cu-P alloys on carbon steel *** method which uses Tafel polarization curves was carried out to study the corrosion performance of the *** results indicate that the anti-corrosion ability of the Ni-Cu-P-TiN composite coating(7.92 μA) is almost doubled compared with that of the as-coated Ni-P(13.60 μA).Furthermore,heat treatment results in first increase and then decrease in anticorrosion *** the Ni-Cu-P-TiN composite coatings heat-treated for 40 min have maximum hardness of HV 960 and a self-corrosion current of 28.20 μ*** friction coefficient of electroless composite coatings was measured by end-facing *** is found that the friction coefficient of the Ni-Cu-P-TiN composite coating decreases apparently compared with those of Ni-P and Ni-Cu-P electroless coatings.

关键词： Composite coating Wear resistance Anti-corrosion property Tafel polarization curves Hardness Self-corrosion current