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Multi-objective Optimization of Operating Parameters Based on Neural Network and Genetic Algorithm in the Blast Furnace 36

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Multi-objective Optimization of Operating Parameters Based o...

Definition of Raceway Boundary Using Fractal Theory

第36届中国控制会议

作者： heng zhou Chunjie Yang Tian Zhuang Zelong Li Yuxuan Li Lin Wang College of Control Science and Engineering State Key Laboratory of Industrial Control TechnologyZhejiang University

ISBN: (纸本)9781538629185

Addressing the complexity and isolation of the blast furnace, field engineers generally operate the system according to their former experience. While stability and safety are the first priority, it is natural to see extra consumption of ores and *** the recent years, researchers have been searching for the optimal operation point within the blast furnace by mathematical methods that include mechanism and data-driven modeling. The reported models have seldom succeeded in offering proper operation parameters to optimize several goals at the same time, as the factors of the blast furnace are highly correlative, which cannot be analyzed separately. In order to get the conflicting targets such as the lowest production cost and coke ratio as well as the highest iron quality, a multi-objective optimization model for the blast furnace based on BP neural network and genetic algorithm is proposed. The model is basically constructed on two theories. One is the BP neural network which can provide a mapping rule for multiple inputs and multiple outputs, the other is the genetic algorithm whose core contents are NSGA-Ⅱ algorithm and Pareto optimality that are fit for the multi-objective optimization goal. By optimizing the blast furnace system with this model, the plant is feasible to keep the iron making process efficient and stable simultaneously.

关键词： Multi-objective Optimization Neural Network Genetic Algorithm NSGA-Ⅱ Pareto Optimality

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Journal of Iron and Steel Research International 2015年第1期22卷 36-41页

作者： Jun-jie SUN Zhi-guo LUO Zhan-xia DI Tao ZHANG heng zhou Zong-shu ZOU School of Materials Science and Metallurgy Northeastern University Anhui University of Technology

The particle velocity contours were obtained by tracking the tracer particles in the raceway region of the COREX melter gasifier model and the contours were irregular. According to the fractal theory, the fractal dimen sions of different particle velocity contours were determined. Through the analysis of the fractal dimensions, a new method for precise determination of the raceway boundary was proposed. The results show that, when the velocity is less than 0.18 m/s, the particles are located in the stagnant zone and the fractal dimensions of particle velocity con- tours are almost constant as 1.41; when the velocity increases from 0.18 to 0.83 m/s, the particles are located in the rapid movement zone and the fractal dimensions decrease gradually from 1.41 to 1.05 ＇when the velocity is grea- ter than 0.83 m/s, the particles are located in the cavity zone and the fractal dimensions are again almost constant as approaching to 1.00. Therefore, the velocity contour of 0.18 m/s, which is critical to distinguish the rapid move- ment zone and stagnant zone, can be used to define the raceway boundary. Based on this method, the effect of blo wing rate on raceway size was calculated and the results show that the penetration depth and height of the raceway increase with the increase of blowing rate.

关键词： raceway boundary physical simulation particle velocity contour fractal

A Brief Analysis of Option Implied Volatility and Strategies

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Economics World 2018年第4期6卷 331-336页

作者： zhou heng University of Adelaide AdelaideAustralia

With the implementation of reform of financial system and the opening-up of financial market in China,knowing and properly utilizing financial derivatives becomes an inevitable *** phenomenon of B-S-M option pricing model underpricing deep-in/out option prices is called volatility *** substantial reasons are conflicts between model’s presumptions and reality;moreover,the market trading mechanism brings extra uncertainties and risks to option writers when doing delta *** volatility research and random volatility research have been modifying B-S-M *** a practical case may let reader have an intuitive and in-depth understanding.

关键词： financial derivatives option pricing option strategies

Stem cells from human exfoliated deciduous teeth ameliorate concanavalin A-induced autoimmune hepatitis by protecting hepatocytes from apoptosis

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World Journal of Stem Cells 2020年第12期12卷 1623-1639页

作者： Yi-Kun zhou Ling-Su Zhu Hua-Ming Huang Sheng-Jie Cui Ting Zhang Yan-heng zhou Rui-Li Yang Department of Orthodontics Peking University School and Hospital of StomatologyNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijing 100081China Department of Orthodontics The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina

BACKGROUND Autoimmune hepatitis is a serious autoimmune liver disease that threatens human health worldwide,which emphasizes the urgent need to identify novel *** cells from human exfoliated deciduous teeth(SHED),which are easy to obtain in a non-invasive manner,show pronounced proliferative and immunomodulatory *** To investigate the protective effects of SHED on concanavalin A(ConA)-induced hepatitis in mice,and to elucidate the associated regulatory *** We used a ConA-induced acute hepatitis mouse model and an in vitro co-culture system to study the protective effects of SHED on ConA-induced autoimmune hepatitis,as well as the associated underlying *** SHED infusion could prevent aberrant histopathological liver architecture caused by ConA-induced infiltration of CD3+,CD4+,tumor necrosis-alpha+,and interferon-gamma+inflammatory *** aminotransferase and aspartate aminotransferase were significantly elevated in hepatitis *** infusion could therefore block ConA-induced alanine aminotransferase and aspartate aminotransferase ***,ConA upregulated tumor necrosisalpha and interferon-gamma expression,which was activated by the nuclear factor-kappa B pathway to induce hepatocyte apoptosis,resulting in acute liver *** administration protected hepatocytes from ConA-induced *** SHED alleviates ConA-induced acute liver injury via inhibition of hepatocyte apoptosis mediated by the nuclear factor-kappa B *** findings could provide a potential treatment strategy for hepatitis.

关键词： Autoimmune hepatitis Stem cells from human exfoliated deciduous teeth Concanavalin A Apoptosis Nuclear factor-kappa B

Hydrogen sulfide, a signaling molecule in plant stress responses

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Journal of Integrative Plant Biology 2021年第1期63卷 146-160页

作者： Jing Zhang Mingjian zhou heng zhou Didi Zhao Cecilia Gotor Luis CRomero Jie Shen Zhenglin Ge Zhirong Zhang Wenbiao Shen Xingxing Yuan Yanjie Xie Laboratory Center of Life Sciences College of Life SciencesNanjing Agricultural UniversityNanjing 210095China Instituto de Bioquimica Vegetal y Fotosintesis Consejo Superior de Investigaciones Cientfficas y Universidad de SevillaSevilla 41092Spain Institute of Industrial Crops Jiangsu Academy of Agricultural SciencesNanjing 210014China

Gaseous molecules, such as hydrogen sulfide(H_2S)and nitric oxide(NO), are crucial players in cellular and(patho)physiological processes in biological systems. The biological functions of these gaseous molecules, which were first discovered and identified as gasotransmitters in animals, have received unprecedented attention from plant scientists in recent decades. Researchers have arrived at the consensus that H_2S is synthesized endogenously and serves as a signaling molecule throughout the plant life ***, the mechanisms of H_2S action in redox biology is still largely unexplored. This review highlights what we currently know about the characteristics and biosynthesis of H_2S in plants. Additionally,we summarize the role of H_2S in plant resistance to abiotic stress. Moreover, we propose and discuss possible redox-dependent mechanisms by which H_2S regulates plant physiology.

关键词： gasotransmitter hydrogen sulfide persulfidation plant physiology redox signaling stress response

Shaking Table Tests on Bridge Foundation Reinforced by Antislide Piles on Slope

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Earthquake Research in China 2019年第3期33卷 514-524页

作者： zhou heng SU Qian LIU Jie YUE Fei School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of High-Speed Railway Engineering Ministry of EducationChengdu 610031China

Based on the requirement of seismic reinforcement of bridge foundation on slope in the Chengdu-Lanzhou railway project,a shaking table model test of anti-slide pile protecting bridge foundation in landslide section is designed and completed. By applying Wenchuan seismic waves with different acceleration peaks,the stress and deformation characteristics of bridge pile foundation and anti-slide pile are analyzed,and the failure mode is discussed. Results show that the dynamic response of bridge pile and anti-slide pile are affected by the peak value of seismic acceleration of earthquake,with which the stress and deformation of the structure increase. The maximum dynamic earth pressure and the moment of anti-slide piles are located near the sliding surface,while that of bridge piles are located at the top of the pile. Based on the dynamic response of structure,local reinforcement needs to be carried out to meet the requirement of the seismic design. The PGA amplification factor of the surface is greater than the inside,and it decreases with the increase of the input seismic acceleration peak. When the slope failure occurs,the tension cracks are mainly produced in the shallow sliding zone and the coarse particles at the foot of the slope are accumulated.

关键词： Shaking table test Anti-slide pile Bridge pile foundation Dynamic response Damage mode

Phthalonitrile Resins Derived from Vanillin: Synthesis, Curing Behavior, and Thermal Properties

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Chinese Journal of Polymer Science 2020年第1期38卷 72-83,I0007页

作者： Yue Han Dong-Hao Tang Guang-Xing Wang Ya-Nan Sun Ying Guo heng zhou Wen-Feng Qiu Tong Zhao South China Advanced Institute for Soft Matter Science and Technology South China University of Technology Laboratory of Advanced Polymeric Materials Institute of Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Sinosteel Anshan Research Institute of Thermo-Energy Co. LTD

Vanillin was used as sustainable source for phthalonitrile monomer synthesis, and allyl/propargyl ether moieties were introduced to improve the processability at the minimal cost of thermal properties. The synthesis route was optimized to minimize side-reactions and simplify post-processing, and the monomers were obtained in high purity and good yields. The curing behavior, mechanism, and processability of the monomers were studied, and the thermal properties of cured polymers were evaluated. Of the two monomers, the allyl ether-containing one exhibited a wide processing window of 185 °C, and was mainly cured into phthalocyanine and linear aliphatic structures through self-catalytic curing process. Also, the glass transition temperature was higher than 500 °C. In contrast, the propargyl ether-containing monomer could only be partially cured, and heat resistance was found to be compromised. Compared with traditional petroleum-based phthalonitrile resins, the biobased monomers could be cured without the addition of catalysts, and improvement in processability was achieved at no cost of thermal performances.

关键词： Allyl ether Curing mechanism Phthalonitrile Thermal properties Vanillin

Optimization of iron ore blending based on replacing Australian low alumina limonite

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Journal of Iron and Steel Research International 2023年第9期30卷 1675-1686页

作者： Bin Li heng zhou Jian Huang Zong-wang Zhang Xue-feng She Jian-fang Wang Sheng-li Wu Ming-yin Kou State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China Shougang Jingtang Iron and Steel Co. Ltd.Tangshan 063200HebeiChina Key Laboratory of Knowledge Automation for Industrial Processes of Ministry of Education School of Automation and Electrical EngineeringUniversity of Science and Technology BeijingBeijing 100083China Delong Iron and Steel Co. Ltd.Xingtai 054009HebeiChina

Mauritanian iron ore powder(OM)has advantages of high iron grade,low aluminum content,and low loss on ignition,which can be used as a new mineral to replace low alumina limonite that has been exhausted in ***,it will have a certain negative impact on sintering because of its high SiO_(2) *** mechanism of SiO_(2) content affecting the sintering behavior was first studied through FactSage ***,the liquid fluidity,penetration,and high-temperature performance of different iron ore powders were ***,the optimization of ore blending structure was studied by the micro-sintering method and the sinter pot *** results show that the increase in SiO_(2) content can reduce the assimilation *** low penetration of OM can lead to an increase in the amount of liquid,and the high SiO_(2) content of OM increases the viscosity of the liquid *** is more,the increase in SiO_(2) also increases the formation of silicate and fayalite phase and inhibits the formation of silico-ferrite of calcium and aluminum(SFCA).To optimize ore blending structure,OM and the low SiO_(2) powder OD from Australia were used together,which improves the content of SFCA by 2.04%and decreases the contents of calcium silicate and fayalite by 0.63%and 4.99%,*** results of the sinter pot test indicated that the properties of sinter have been improved.

关键词： Mauritanian iron ore powder Liquid fluidity Penetration Mineral composition Sintering Ore blending Low alumina limonite

一株海洋微小链霉菌群体感应抑制活性及培养条件的研究

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生物技术通报 2019年第10期35卷 137-143页

作者：周恒姜芸许叶祥钱生辉缪莉扬州大学环境科学与工程学院扬州225127 中国科学院热带海洋生物资源与生态重点实验室广州510301

以一株分离自连云港海区表层海水中的海洋微小链霉菌(Streptomyces parvulus HY026)为研究对象,采用滤纸片法对其进行群体感应抑制活性测试。结果显示*** HY026的代谢产物能显著抑制群体感应报告菌紫色杆菌产紫色素,表现出较强的群体感... 详细信息

以一株分离自连云港海区表层海水中的海洋微小链霉菌(Streptomyces parvulus HY026)为研究对象,采用滤纸片法对其进行群体感应抑制活性测试。结果显示*** HY026的代谢产物能显著抑制群体感应报告菌紫色杆菌产紫色素,表现出较强的群体感应抑制活性;采用单因子实验,对HY026进行培养基碳源及氮源的优化。发现以玉米粉为碳源时,所得粗提物的质量及群体感应抑制活性最高;以黄豆粉为氮源时,所得粗提物的质量及其活性最高。根据单因子实验结果,选取玉米粉和黄豆粉为最佳碳、氮源,连同盐度、磷酸氢二钾共4个因素进行L16(45)正交实验,以各处理所得的发酵液粗提物质量和群体感应活性为指标进行分析。确定4个因素的重要性顺序为磷酸氢二钾>盐度>玉米粉>黄豆粉,最佳培养基配方为:磷酸氢二钾1.0 g/L,盐度34.0 g/L,玉米粉10.0 g/L,黄豆粉5.0 g/L。以此配方培养时,与原高氏一号培养基培养相比,*** HY026的发酵液粗提物质量和群体感应抑制活性分别提高了398%和19%。

关键词：海洋微生物微小链霉菌群体感应条件优化