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Determination and Analysis of Hardenability for Hot-Forging Die steels with Deep-Hardening

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Journal of Iron and steel Research International 2000年第1期7卷 27-30页

作者： ZHAO Gang JIANG Min QIN Gao-wu HAO Shi-ming GU Rong DAI Jian-ming Northeastern University Research Institute of fushun steel plant

ERH end-quenching method was used to determine the hardenability of four kinds hot-forging die steels with deep-hardening and hence the order of their hardenability was *** tempering hardness of the steels was measured and the tempering resistance was *** was approved that ERH method is effective for the determination of hardenability of deep-hardening steel and the beginning of hardness drop in the ERH specimen is caused by bainite occurring.

关键词： hardenability deep-hardening steel hot-forging die steel tempering resistance

DISCUSSIONS ON“AN ASYMPTOTIC ELASTIC PLASTIC ANALYSIS IN PLANE STRAIN DEFORMATION NEAR A CRACK TIP”

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Applied Mathematics and Mechanics(English Edition) 1981年第6期2卷 779-781页

作者：孟宪纲 Liaoning fushun steel plant

*** his paper,*** derived the following functionf(θ)=-[(1+2n)/(1+n)~2-k~2]A/kθ-[(1+2n)/(1+n)~2-k~2]A/k-coskθ(1)In calculation of coefficients A,Aa mistake *** use of f′(π)=0 andf(0)=0,

关键词： exp In AN ASYMPTOTIC ELASTIC PLASTIC ANALYSIS IN PLANE STRAIN DEFORMATION NEAR A CRACK TIP DISCUSSIONS ON

High Efficient Blowing Technique for Large and Medium Converters

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Journal of Iron and steel Research International 2010年第2期17卷 1-5页

作者： JIANG Xiao-fang YANG Wen-yuan WANG Ming-lin CHEN Yuan-ping GAN Yong steelmaking plant Baoshan Iron and Steel Co Ltd Shanghai 201900 China National engineer.ngResearch Center of Continuous Casting Central Iron and Steel Research Institute Beijing 100081 China General engineer.Office Haixin Iron and Steel Co Wenxi 043801 Shanxi China

The high efficient blowing technique includes increasing oxygen supply intensity and optimizing slag forming. The oxygen supply intensity on 300 t converters of No. 1 steelmaking shop at Baosteel reaches 3.83 m^3/（t · min）, and at Taiyuan steel, Lianyuan steel, Pingxiang steel and other steel plants, the oxygen supply intensity on medium converters is in the range of 4.0--4.4m^3/（t · min）. The productivity of converter can be increased by 8% -- 15% with adopting this technique. The whole technique, including design and manufacture of lance nozzle with reasonable pacnolontenue of outlets, technique of oxygen supply and slag forming, has been developed by CISRI to meet the need of technique transfer.

关键词： converter oxygen supply intensity oxygen blowing time efficient dephosphorization

Design and Development of Highly Efficient Ni/ZnO Catalysts Based on Semiconductor Metal Oxide Catalysis Theory

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China Petroleum Processing & Petrochemical Technology 2023年第2期25卷 33-40页

作者： Bian Yankun Kang Lei Wu Feng Wang Haiyan Bai Yingzhi Sun Na School of Petrochemical engineer.ng Liaoning Petrochemical UniversityFushun 113001China China Huanqiu Contracting&engineer.Lanzhou)Co. Ltd.Beijing 100029China

In the context of reactive adsorption desulfurization,the development of an efficient Ni/ZnO desulfurizer has attracted increasing *** the work reported here,a novel Ni/Mn-ZnO composite nanowire desulfurizer is designed on the basis of the catalytic theory of semiconductor metal oxides and the characteristics of one-dimensional nanomaterials.X-ray diffraction,scanning electron microscopy,N_(2) adsorption-desorption,and X-ray photoemission spectroscopy demonstrate that Mn doping changes the crystal structure and morphology of the Ni/ZnO desulfurizer,increases the number of quasi-free electrons in the ZnO,and promotes H_(2)S *** Ni/Mn-ZnO composite nanowire desulfurizer exhibits good desulfurization performance when used with gasoline as the raw material.

关键词： Ni/ZnO nanowire Mn desulfurization

Preparation and Commercial Application of ZHC-01 Hydrocracking Catalyst

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China Petroleum Processing & Petrochemical Technology 2007年第2期9卷 43-47页

作者： Xu Xuejun Liu Dongxiang Wang Haitao Feng Xiaoping Wang Jifeng fushun Research Institute of Petroleum and Petrochemicals Fushun 113001

The ZHC-01 hydrocracking catalyst, characterized by high hydrogenation activity, good selectivity for middle distillates, strong resistance to nitrogen poisoning, was prepared by co-gelling. The catalyst is not only suited to the single-stage hydrocracking process, but also to the first stage of serial hydrocracking process. In parallel with the fully loaded operation of the 1.4 Mt/a hydrocracking unit at the SINOPEC Qilu Petrochemical Company, a pilot test of the ZHC-01 catalyst was also carried out on the hydrocracking unit. The test results indicated that the activity, the yield of major target products and quality of the ZHC-01 catalyst could comply with the design requirements for the hydrocracking unit, and this catalyst could be applied in the hydrocracking unit. The commercial test results showed that the ZHC-01 catalyst, featuring good activity, stability, and flexibility in production, not only could meet the demand for producing environmentally friendly middle distillates, but could also increase the resource of optimized steam cracking feedstock.

关键词： hydrocracking catalyst pilot plant test commercial application

MRI can reveal metabolic changes in lily bulbs in vivo during dormancy release

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Science China(Life Sciences) 2012年第11期55卷 1002-1006页

作者： HAN HaoJun YI MingFang Department of Ornamental Horticulture and Landscape Architecture China Agricultural UniversityBeijing 100193China fushun Teachers College Fushun 113006China

The factors influencing dormancy release in lily bulbs strongly affect commercialization success, but the mechanism of dormancy release is still unclear. Magnetic resonance imaging (MRI) can detect changes in morphology and water status in a living plant bulb and aid in investigating release factors. To evaluate whether MRI could be used to detect intra-bulb metabolic changes during the dormant period in Oriental Lilies (Lilium 'Sorbonne'), a series of MRI and sugar concentration measurements were performed weekly on bulbs stored for 11 weeks at 4°C. The image quality of intra-bulb structure obtained using T 1-weighted imaging was superior to that obtained using T 2 -weighted imaging and had a higher signal-to-noise ratio (0.97±0.01). Magnetization transfer ratio values for the bud and basal plate declined during the first eight weeks of cold storage (P>0.05), and were well correlated with concentration of soluble sugar in the bud (R 2 =0.95) and basal plate (R 2 =0.93). Thus, MRI can serve as a valuable tool for observation and analysis of dynamic morphological and metabolic changes in vivo during dormancy release. This information is potentially useful as a guide in the improvement of horticultural product quality.

关键词： transverse and longitudinal relaxation times magnetization transfer ratio (MTR) soluble sugar magnetic resonanceimaging (MRI) Lilium oriental hybrids dormancy release

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The role of CopG mediated DNA bending on the regulation of the σ^(54)-dependent promoters in E. coli

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Chinese Science Bulletin 2006年第8期51卷 934-940页

作者： YANG Ence National Laboratory of Protein engineer.ng and plant Genetic engineer. ing College of Life Sciences Peking University

In order to investigate the role of DNA bending on the regulation of σ54-dependent promot- ers, we introduced the CopG binding site between the enhancer-like element and the core promoter of glnAp2, nifLp and glnHp2, without changing the dis- tance in between. The expression activities of these homologous promoters were either activated or re- pressed by the CopG-induced DNA bending in E. coli. In this case, similar regulatory pattern (either acti- vated or repressed) could be observed, when the bending centers from CopG are in integral DNA he- lixes interval, while opposite regulatory pattern could be observed, when the bending centers from CopG are in integral plus a half DNA helixes interval. These results suggested that CopG-induced DNA bending can exert regulatory effects on the transcription of σ54-dependent promoters probably by altering the relative DNA helix phase of 54 RNA polymerase and NtrC.

关键词： DNA CopG 启动子大肠杆菌

Three-scale integrated optimization model of furnace simulation,cyclic scheduling,and supply chain of ethylene plants

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Chinese Journal of Chemical engineer.ng 2022年第4期35卷 29-40页

作者： Kexin Bi Mingyu Yan Shuyuan Zhang Tong Qiu Department of Chemical engineer.ng Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Industrial Big Data System and Application Beijing 100084China fushun Petrochemical Company PetroChinaFushun 113008China

In order to explore the potential of profit margin improvement,a novel three-scale integrated optimization model of furnace simulation,cyclic scheduling,and supply chain of ethylene plants is proposed and evaluated.A decoupling strategy is proposed for the solution of the three-scale model,which uses our previously proposed reactor scale model for operation optimization and then transfers the obtained results as a parameter table in the joint MILP optimization of plant-supply chain scale for cyclic *** optimization framework simplifies the fundamental mixed-integer nonlinear programming(MINLP)into several sub-models,and improves the interpretability and *** the evaluation of an industrial case,a profit increase at a percentage of 3.25%is attained in optimization compared to the practical *** sensitivity analysis is carried out for strategy evolving study when price policy,supply chain,and production requirement parameters are *** results could provide useful suggestions for petrochemical enterprises on thermal cracking production.

关键词： Three-scale integrated optimization Cyclic scheduling Supply chain Mixed-integer linear programming Thermal cracking

Effective damping of local low frequency oscillations in power systems integrated with bulk PV generation

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Protection and Control of Modern Power Systems 2021年第1期6卷 512-524页

作者： Ahmed Hesham Abd El-Kareem Mohamed Abd Elhameed Mahmoud M.Elkholy Operation engineer.at New Capital Power plant New Capital CityEgypt Electrical Power and Machines Department Faculty of EngineeringZagazig UniversityZagazigEgypt

High penetration of renewable sources into conventional power systems results in reduction of system inertia and noticeable low-frequency oscillations (LFOs) in the rotor speed of synchronous generators. In this paper, we propose effective damping of LFOs by incorporating a supplementary damping controller with a photovoltaic (PV) generating station, where the parameters of this controller are coordinated optimally with those of a power system stabilizer (PSS). The proposed method is applied to damp local electromechanical modes by studying a system comprising a synchronous generator and a PV station connected to an infinite bus. The PV station is modeled following the instructions of the Western Electricity Coordinating Council. The problem is modeled as an optimization problem, where the damping ratio of the electromechanical modes is designed as the objective function. Constraints including upper and lower limits of decision parameters and damping ratio of other modes are considered by imposing penalties on the objective function. Different optimization algorithms are used to pursue the optimal design, such as political, improved gray wolves and equilibrium optimizers. The results validate the effectiveness of the proposed controller with PSS in damping local modes of oscillations.

关键词： Low frequency oscillations Damping controller PV WECC