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Meta-heuristic optimization inspired by proton-electron swarm

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The Journal of China Universities of Posts and Telecommunications 2020年第3期27卷 42-52,72页

作者： liu Yongli liu shen School of Computer Science and Technology Henan Polytechnic UniversityJiaozuo 454000China

While solving unimodal function problems,conventional meta-heuristic algorithms often suffer from low accuracy and slow ***,in this paper,a novel meta-heuristic optimization algorithm,named proton-electron swarm(PES),is proposed based on physical *** algorithm simulates the physical phenomena of like-charges repelling each other while opposite charges attracting in protons and electrons,and establishes a mathematical model to realize the optimization *** balancing the global exploration and local exploitation ability,this algorithm achieves high accuracy and avoids falling into local optimum when solving target *** order to evaluate the effectiveness of this algorithm,23 classical benchmark functions were selected for comparative *** results show that,compared with the contrast algorithms,the proposed algorithm cannot only obtain higher accuracy and convergence speed in solving unimodal function problems,but also maintain strong optimization ability in solving multimodal function problems.

关键词： meta-heuristic proton electron swarm

In memory of the well-renowned Chinese cellular biologist Shien Sher-Pu

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Protein & Cell 2023年第1期14卷 1-3页

作者： Nan shen shen liu School of Foreign Languages Anhui Agricultural UniversityHefei 230022China School of Humanities and Social Sciences Anhui Agricultural UniversityHefei 230022China Research Center for Philosophy of Physics University of Science and Technology of ChinaHefei 230022China

Academician Shien Sher-Pu(薛社普),one of the pioneers of cytobiology and reproductive biology research in China,initiated a research regarding red blood cells(RBC)nucleation mechanism in cell growth and differentiation *** had achieved breakthrough achievements in the development of male birth control pill and made an important contribution to the research of reproductive biology and cytopharmacology(Figs.1 and 2).

关键词： Academician 薛社普 breakthrough

Failure Envelopes of Single-Plate Rigid Helical Anchors for Floating Offshore Wind Turbine

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China Ocean Engineering 2023年第6期37卷 1000-1010页

作者： CHEN Hong-zhen WANG Le TIAN Ying-hui ZHANG chun-hui shen Zhi-chao liu Meng-meng State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation Tianjin UniversityTianjin 300072China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China Department of Infrastructure Engineering Faculty of Engineering and Information Technology The University of MelbourneVictoria 3010Australia School of Civil Engineering Hebei University of Science and TechnologyShijiazhuang 050018China Hebei Technological Innovation Center of Disaster Prevention and Mitigation Engineering of Geotechnical and Structural System Shijiazhuang 050018China School of Marine Science and Engineering South China University of TechnologyGuangzhou 511442China Institute of Ocean Energy and Intelligent Construction Tianjin University of TechnologyTianjin 300384China

Helical anchor is a kind of novel foundation for floating offshore wind turbines,which should be subjected to combined tensile loading caused by wind,wave and ***,the research about the capacity of helical anchor was mainly examined under uniaxial loading and scarcely explored under combined *** this study,three-dimensional finite element limit analysis is adopted to assess the bearing capacities of single-plate rigid helical anchors with different ratios of helix to shaft diameter,D_(H)/D_(S) and embedment ratios L/D_(S).Result shows that the vertical,horizontal and moment bearing capacities increase with increasing D_(H)/D_(S) and L/D_(S).The normalized V-H failure envelopes expands with increasing L/D_(S),while the normalized V-M failure envelopes tend to contract with the increase of D_(H)/D_(S).With increasing D_(H)/D_(S) or decreasing L/D_(S),the normalized H-M failure envelopes expand when the horizontal and moment loading act in the same direction and contract when they act in the opposite *** effect of D_(H)/D_(S) and L/D_(S) on the shape of H-M failure envelope become insignificant when L/D_(S)≥4.A series of failure mechanisms under different loading conditions were observed and can be used to explain the ***,a series of approximate expressions were proposed to fit the uniaxial bearing capacities and the failure envelopes.

关键词： helical anchors bearing capacity failure envelope clay

Zinc extraction from zinc oxidized ore using(NH4)2SO4 roasting−leaching process

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International Journal of Minerals,Metallurgy and Materials 2020年第11期27卷 1471-1481页

作者： Xiao-yi shen Hong-mei Shao Ji-wen Ding Yan liu Hui-min Gu Yu-chun Zhai Key Laboratory for Ecological Utilization of Multimetallic Mineral of Ministry of Education School of MetallurgyNortheastern UniversityShenyang 110819China School of Environmental and Chemical Engineering Shenyang Ligong UniversityShenyang 110159China School of Computer Science and Engineering Northeastern UniversityShenyang 110819China

An improved method of(NH4)2SO4 roasting followed by water leaching to utilize zinc oxidized ores was *** operating parameters were obtained by investigating the effects of the molar ratio of(NH4)2SO4 to zinc,roasting temperature,and holding time on zinc *** roasting process followed the chemical reaction control mechanism with the apparent activation energy value of 41.74 kJ·mol^−*** transformation of mineral phases in roasting was identified by X-ray diffraction analysis combined with thermogravimetry–differential thermal analysis *** water leaching conditions,including the leaching temperature,leaching time,stirring velocity,and liquid-to-solid ratio,were discussed,and the leaching kinetics was *** reaction rate was obtained under outer diffusion without product layer control;the values of the apparent activation energy for two stages were 4.12 and 8.19 kJ·mol^−*** maximum zinc extraction ratio reached 96%while the efficiency of iron extraction was approximately 32%under appropriate *** work offers an effective method for the comprehensive use of zinc oxidized ores.

关键词： zinc oxidized ore ammonium sulfate roasting,water leaching kinetics mechanism extraction ratio

Effects of overaging temperature on the microstructure and properties of 600MPa cold-rolled dual-phase steel

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International Journal of Minerals,Metallurgy and Materials 2016年第8期23卷 943-948页

作者： chun-fu Kuang Zhi-wang Zheng Gong-ting Zhang Jun Chang shen-gen Zhang Bo liu State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Research Institute of Pangang GroupPanzhihua 617000China Institute for Advanced Materials and Technology University of Science and Technology BeiiingBeiiing 100083China

C–Mn steels prepared by annealing at 800°C for 120 s and overaging at 250–400°C were subjected to pre-straining（2%） and baking treatments（170°C for 20 min） to measure their bake-hardening（BH_2） values. The effects of overaging temperature on the microstructure, mechanical properties, and BH_2 behavior of 600 MPa cold-rolled dual-phase（DP） steel were investigated by optical microscopy, scanning electron microscopy, and tensile tests. The results indicated that the martensite morphology exhibited less variation when the DP steel was overaged at 250–350°C. However, when the DP steel was overaged at 400°C, numerous non-martensite and carbide particles formed and yield-point elongation was observed in the tensile curve. When the overaging temperature was increased from 250 to 400°C, the yield strength increased from 272 to 317 MPa, the tensile strength decreased from 643 to 574 MPa, and the elongation increased from 27.8% to 30.6%. Furthermore, with an increase in overaging temperature from 250 to 400°C, the BH_2 value initially increases and then decreases. The maximum BH_2 value of 83 MPa was observed for the specimen overaged at 350°C.

关键词： dual-phase steel overaging temperature microstructure mechanical properties carbides

Kinetics of roasting potash feldspar in presence of sodium carbonate

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Journal of Central South University 2017年第7期24卷 1544-1550页

作者： liu Jia-nan ZHAI Yu-chun WU Yan ZHANG Jun shen Xiao-yi School of Metallurgy Northeastern UniversityShenyang 110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China

A novel process was proposed for the utilization of potash feldspar by roasting in the presence of sodium carbonate. The effects of roasting temperature, granularity, molar ratio of sodium carbonate to potash feldspar and roasting time on the silica extraction rate were investigated. Under the optimal roasting conditions, the silica extraction rate was 98%. The optimal conditions, determined using an orthogonal experiment, were found to be roasting temperature of 875 A degrees C, potash feldspar granularity of 74-89 mu m, molar ratio of sodium carbonate to potash feldspar of 1.2:1, and roasting time of 80 min. The kinetics of potash feldspar roasting in the presence of sodium carbonate was described by the shrinking core model and the reaction rate was found to be controlled by the chemical reaction at the particle surface. According to the Arrhenius expression, the activation energy was 164.99 kJ/mol, and the process could be expressed as [1-(1-alpha)(1/3)]=2.66x10(5) exp[-164990/(RT)] t.

关键词： potash feldspar sodium carbonate roasting kinetics silica

One-step Crystallization Kinetic Parameters of the Glass-ceramics Prepared from Stainless Steel Slag and Pickling Sludge

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Journal of Iron and Steel Research International 2016年第3期23卷 220-224页

作者： shen-gen ZHANG Jian YANG Bo liu De-an PAN chun-li WU Alex A.VOLINSKY Institute for Advanced Materials and Technology School of Materials Science and EngineeringUniversity of Science and Technology Beijing Department of Mechanical Engineering University of South Florida

One-step crystallization is one of the most energy conserving methods for glass-ceramics ***,only a few kinetics studies focused on the glass-ceramics prepared by the one-step *** onestep crystallization kinetic parameters were studied using differential scanning *** activation energy（Ea）and the Avrami parameter（n）were calculated as 152.79kJ·mol-1 and 4.39,*** parameters indicate that continuous nucleation and three-dimensional crystal growth are the dominating mechanisms in the one-step crystallization process of the parent *** properties of the obtained glass-ceramics can be compared to the glass-ceramics prepared by the two-stage heat treatment and sintering *** crystallization kinetics research can be used to evaluate the one-step crystallization potential of a parent glass.

关键词： glass-ceramics one-step crystallization crystallization kinetics continuous nucleation

A New Approach for Preparing Effective Inhibition Film on Copper Based on Self-assembled Process

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Chinese Chemical Letters 2003年第3期14卷 308-311页

作者： chun Tao shen Hao CHEN DepartmentofChemistry ShandongUniversityJinan250100 StateKeylaboratoryforCorrosionandProtection Shenyang110015

A new method for preparing effective inhibition film on copper has been developed. Phenylthiourea (PT) was first absorbed to copper surface to form a monolayer. 1-Dodecanethiol (DT) was then assembled on the surface for modification. Finally, AC voltage was loaded on copper covered the mixed film to improve it further. After these processes, an effective inhibition film was gained because of its high charge transfer resistance and low corrosion current density shown in electrochemical impedance spectra and polarization. The inhibition efficiency was more than 97%.

关键词： Self-assembly phenylthiourea (PT) 1-dodecanethiol (DT) AC voltage.

One-step synthesis of hydrophobic magnesium hydroxide nanoparticles and their application in flame-retardant polypropylene composites

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Chinese Journal of Chemical Engineering 2018年第10期26卷 2199-2205页

作者： Hongyan shen Youzhi liu Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering College of Chemical Engineering and Environment North University of China

Hydrophobic magnesium hydroxide(MH) nanoparticles were prepared by a one-step synthesis method in a high-gravity environment generated by a novel impinging stream–rotating packed bed(IS-RPB) reactor. The reactant solutions were simultaneously and continuously pumped into the IS-RPB reactor, and then Tween80 was added as a surface modifier. The morphology, structure, and properties of blank and hydrophobic MH were characterized. The effects of MH nanoparticles on the flame retardancy, thermal stability, and mechanical properties of PP/MH composites were also studied. We found that the obtained MH nanoparticles exhibited hexagonal lamella with a mean size of 30 nm, excellent hydrophobic properties(e.g., high water contact angle of 112°), and improved thermal stability of MH. The limiting oxygen index(LOI) further showed that increased MH loading can significantly improve flame-retardant performance, which reached 29.3% for PP/MH composites with 30 wt% hydrophobic samples. The thermal stability and mechanical properties of the PP/MH composites with hydrophobic samples were also much higher than those of PP/MH composites with blank MH. Results showed that the one-step synthesis had high potential application in the large-scale production of hydrophobic MH nanoparticles.

关键词： Magnesium hydroxide Synthesis Polypropylene Hydrophobic property Rotating packed bed