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New Solution to Surface Temperature of Casting Slab Measurement Based on Preceded Reflector and Multi-Wavelength

Journal of Iron and Steel Research International 2012年第8期19卷 12-16页

作者： LIU Jun1, MA Jiao-cheng2. YANG Feng3, XIAO Hui1, RAO Li-min1 (1. school of Nuclear engineering and Technology, East{2. Institute of Technology, Fuzhou 344000, Jiangxi,{2. 2. school of mechanical engineering and automation, northeastern university, shenyang 110004, liaoning,{2. 3. school of Civil and Environmental engineering, East{2. Institute of Technology, Fuzhou 344000, Jiangxi,{2.) school of Nuclear engineering and Technology East China Institute of Technology Fuzhou Jiangxi China school of mechanical {2. and automation Northeastern University Shenyang Liaoning China school of Civil and Environmental engineering East China Institute of Technology Fuzhou Jiangxi China

The surface temperature of casting slab is an important parameter in the metallurgy field. Because the surface emissivity is uncertain and also unknown, it is difficult to measure the slab surface temperature accurately. A method based on preceded reflector and multi-wavelength was put forward to deal with the difficulty in surface temperature measurement of casting slab. On the premise of preceded reflector and non-preceded reflector, the method establishes the radiation energy equations and works out the emissivity and temperature in the equations. Also, the multilayer modeling of casting slab surface and multiple reflection-absorption process modeling were built by Monte Carlo method. The temperature measuring method had been applied in the continuous casting field. In order to verify the measured result, the thermal imaging method was adopted when the slab surface emissivity was set by repeated tests. Finally, the measured and verified temperature curves keep a same tendency and the error of the values is lower than 5℃. The comparison result shows that the method can measure temperature accurately.

关键词： casting slab emissivity surface temperature preceded reflector multi-wavelength

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External synchronization of two dynamical systems with uncertain parameters

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Science china(Technological Sciences) 2010年第3期53卷 731-740页

作者： HAN QingKai 1,SUN XiaoYu 2.YANG XiaoGuang 3 &WEN BangChun 1 1 school of mechanical {2.&automation,northeastern university,shenyang 110004,china 2.school of Electrical {2.,shenyang university of Technology,shenyang 11002.,china 3school of mechanical {2.,The university of Birmingham,Birmingham,B15 2.T,UK school of mechanical {2. & automation Northeastern University Shenyang China school of Electrical engineering Shenyang University of Technology Shenyang China school of mechanical {2. The University of Birmingham Birmingham UK

External synchronization is addressed as two or more dynamical systems with synchronous motions,which is also regarded as master-slave *** this paper,two dynamical systems,one employs a hysteretic term to model the friction phenomenon,the other involves a hardening stiffness component with the third order of displacement due to flexible deformation,are controlled to converge to the same *** control strategy is extended from feedback control for all parameters known to adaptive control for linear parameters unknown and all parameters *** slave system can keep synchronous motions with the movements of master via the designed control strategy even all the parameters are not *** stability of synchronization error,the transient process into synchronization and the effects of parameters on the designed controller using different control strategies are *** simulation results unfold the feasibility and effectiveness of this synchronization method.

关键词： controlled synchronization uncertain parameters hysteretic system Duffing system

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International Transferring Trend in Manufacturing Industry

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厦门大学学报（自然科学版） 2002年第S1期41卷 222-223页

作者： ZHAO Xin-jun 1, XU Li-hui 2.(1. school of mechanical {2. and automation, northeastern Unive rsity, shenyang 110004, china 2. school of Business Administration, Northea stern university, shenyang 110004, china)

This paper addressed the international transferring t endency of manufacturing industry one by one as follows: (1) The developed count ries realize manufacturing industry structure upgrade reling on worldwide tr ansference not only domestic transference. On one hand, the TNCs make cross-inv estments, transnational merger & acquisition so as to achieve the optimum colloc ation of R&D resources, and obtain innovation in knowledge and technology. On th e other hand, the developed countries transfer labor and resource intensive indu stry as well as the labor-intensive link of the production chain in highly tech nology industry to the developing countries, to make their industrial structure escalation. (2. The adjustment and upgrade of manufacturing industry presents "m ulti-step type". First, the object of international transference substitutes th e capital-intensive industry and maturing industry with complicate technique fo r the industry with labor-intensive, simple technique or higher pollution, or s ubstitutes non-core complex technological procedure and parts and components fo r assembly in manufacturing process. Secondly, technology transference forms "br ain-hand and foot" pattern, i.e. the developed countries are increasingly p aying more and more attention to the research and control of core technology, th us transferring simple technique and labor-intensive procedure in higher scienc e and technology. Thirdly, the developed countries begins to transfer both capit al and technology intensive production, as well as transfer certain procedures i n higher technology production process to a few developing countries, even t o transfer parts of R & D to developing countries. (3) TNCs promote the global m anufacturing network (GMN) by recombination and transfer. TNCs organize producti on, trade, technological research and transference through foreign direct invest ment (FDI) all over the world, as a result, GMN makes the national competence no longer depend on absolu

关键词： manufacturing industry international transferrin g tendency

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Materials Design of Microstructure in Grain Boundary and Second Phase Particles

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Journal of Materials Science & Technology 2003年第2期19卷 97-101页

作者： Yaping ZONG and Liang ZUODepartment of Materials Science and engineering, northeastern university,{2., china Dept. of Mat. Sci. and Eng. Northeastern Univ. Shenyang 110004 China

A concept of microstructure design for materials or materials microstructure engineering is proposed. The argument was suggested based on literature review and. some our new research work on second phase strengthening mechanisms and mechanical property modeling of a particulate reinforced metal matrix composite. Due to development of computer technology, it is possible now for us to establish the relationship between microstructures and properties systematically and quantitatively by analytical and numerical modeling in the research scope of computerization materials. Discussions and examples on intellectual optimization of microstructure are presented on two aspects: grain boundary engineering and optimal geometry of particulate reinforcements in two-phase materials.

关键词： Microstructure design Particulate reinforcement Grain boundary engineering Strengthening mechanism Eshelby approach Numerical modelling

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Adaptive synchronization of neural networks with different attractors

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Progress in Natural Science:Materials International 2007年第6期17卷 687-695页

作者： Zhang Huaguang1, Guan Huanxin1 and Wang Zhanshan1,2.1. school of Information Science and engineering,{2., shenyang 110004, china 2. school of Information Science and engineering, shenyang Ligong university, shenyang 110168, china) school of Information Science and engineering Northeastern University Shenyang 110004 China school of Information Science and engineering Shenyang Ligong University Shenyang 110168 China

This paper aims to present an adaptive control scheme for the synchronization of two classes of uncertain neural networks with different attractors. A new sufficient condition for the global synchronization of two kinds of neural networks with different attractors is derived. The proposed control method is efficient and easy to be implemented. Numerical simulation is used to show the effectiveness of the obtained result.

关键词： neural networks attractor adaptive synchronization linear matrix inequality.

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Influence of Controlled Rolling and Cooling Process on the mechanical Properties of Low Carbon Cold Forging Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 595-599页

作者： LI Zhuang 1,WU Di 2.ZHENG Hui 1,DONG Xue-xin 2.(1.school of Materials Science and engineering,{2. university of Aeronautics and Astronautics,{2. 110136,liaoning,china 2.State Key Laboratory of Rolling and automation,northeastern university,{2. 110004,liaoning,china) shenyang Univ Aeronaut & Astronaut Sch Mat Sci & Engn Shenyang 110136 Liaoning Peoples R China northeastern Univ State Key Lab Rolling & Automat Shenyang 110004 Liaoning Peoples R China

In the present paper,controlled rolling and cooling processing was conducted by using a laboratory hot rolling *** influence of different processing parameters on the mechanical properties of low carbon cold forging steel was *** results show that the faster cooling after the deformation (especially in low temperature rolling conditions) leads to the refinement of the ferrite *** specimen exhibits very good mechanical properties owing to the finer ferrite *** pearlite morphologies can also affect the mechanical properties of low carbon cold forging *** mechanical properties increase with decreasing final cooling temperature within the range from 650℃ to 570 ℃ due to the finer interlamellar spacing of pearlite *** mechanical properties of the specimens with fast cooling after the conventional rolling are not only better than those of the specimens with slow cooling after low temperature rolling,but also almost similar to those of the specimens with fast cooling after low temperature *** is suggested that fast cooling after high temperature rolling (the conventional rolling) process would be of important industrial value.

关键词： controlled rolling and cooling process low carbon cold forging steel fast cooling the finer ferrite grains mechanical properties

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STEP-NC Based High-level Machining Simulations Integrated with CAD/CAPP/CAM

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International Journal of automation and computing 2012年第5期9卷 506-517页

作者： Yu Zhang 1 Xiao-Lan Bai 1 Xun Xu 2.Yong-Xian Liu 1 1 school of mechanical {2. & automation,northeastern university,shenyang 110004,china 2.school of {2.,university of Auckland,Auckland 1010,New Zealand school of mechanical {2. & automation Northeastern University Shenyang China school of engineering University of Auckland Auckland New Zealand

With the development of manufacturing,numerical control(NC) machining simulation has become a modern tool to obtain safe and reliable machining *** some research and commercial software about NC machining simulations is available,most of them is oriented for G&M *** is a low-level data model for computer numerical control(CNC),which has inherent drawbacks such as incomplete data and lack of *** limitations hinder the development of a real simulation ***,standard for the exchange of product data-compliant numerical control(STEP-NC) is a new and high-level data model for *** provides rich information for CNC machine tools,which creates the condition for an informative and real ***,this paper proposes STEP-NC based high-level NC machining simulations solution integrated with computer-aided design/computeraided process planning/computer-aided manufacturing(CAD/CAPP/CAM).It turned out that the research provides a better informed simulation environment and promotes the development of modern manufacturing.

关键词： Standard for the exchange of product data-compliant numerical control(STEP-NC) numerical control(NC) machining machining simulation IDEF0 method ISO 6983

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A novel adaptive backstepping design of turbine main steam valve control

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控制理论与应用（英文版） 2010年第4期8卷 425-428页

作者： Liying SUN,Jun ZHAO (Key Laboratory of Integrated automation of Process Industry,Ministry of Education,and school of Information Science and {2.,northeastern university,shenyang liaoning 110004,china) Key Laboratory of Integrated automation of Process Industry Ministry of Education and School of Information Science and Engineering Northeastern University Shenyang Liaoning China

The problem of transient stability for a single machine infinite bus system with turbine main steam valve control is addressed by means of a novel adaptive backstepping method in this *** recursive design procedure of the proposed controller is much simpler than that of the existing controller based on conventional adaptive backstepping *** the system,the damping coefficient is measured inaccurately,and the reactance of transmission line also contains a few uncertainties.A nonlinear robust controller and parameter updating laws are obtained *** system does not need to be linearized,and the closed-loop error system is guaranteed to be asymptotically *** design procedure and simulation results demonstrate the effectiveness of the proposed design.

关键词： Novel adaptive backstepping Nonlinear control Parameter uncertainty Steam valve control

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mechanical PROPERTIES IN AN INTERCRITICALLY HEAT-TREATED BAINITE-TRANSFORMED 2.Si STEEL

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Acta Metallurgica Sinica(English Letters) 2004年第5期17卷 725-731页

作者： Z. Li1,2. and D. Wu1)1) State Key Lab of Rolling and automation, northeastern university,{2., china2. Institute of Aeronautical engineering, shenyang 110034, china Lab. of Rolling Technol. Northeastern Univ. Shenyang 110004 China Inst. of Aeronautical Eng. Shenyang 110034 China

A significant amount of austenite can be retained by rapid cooling following intercritical annealing and holding at the bainite transformation range in steel with comparatively low carbon and silicon contents. Retained austenite is blocky and very fine and moderately stabilized due to C enrichment. The elongation and the strength-ductility balance of the steel can be enhanced considerably due to strain-induced martensite transformation and transformation-induced plasticity (TRIP) of retained austenite.

关键词： mechanical properties intercritical annealing retained austenite bainite transformation steel

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Study on the Corrosion Resistance of Multiphase TRIP Steels

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Journal of Iron and Steel Research International 2011年第S1期18卷 883-887页

作者： WANG Ji-jie 1,WU Di 2.LI Zhuang 1,GUO Xiang-min 1,HE Chun-lin 3,CAI Qing-kui 3 (1.school of Materials Science and engineering,{2. university of Aeronautics and Astronautics,{2. 110136,liaoning,china 2.State Key Laboratory of Rolling and automation,northeastern university,{2. 110004,china 3.liaoning Province Key Laboratory for Advanced Materials,{2. university,{2. 110044,liaoning,china) shenyang Univ Aeronaut & Astronaut Sch Mat Sci & Engn Shenyang 110136 Liaoning Peoples R China northeastern Univ State Key Lab Rolling & Automat Shenyang 110004 Peoples R China shenyang Univ Liaoning Prov Key Lab Adv Mat Shenyang 110044 Liaoning Peoples R China

Multiphase TRIP (Transformation Induced Plasticity) steels are known to combine higher strength with higher *** this paper,the corrosion resistance of this steel has been has been investigated by accelerated corrosion tests,such as wet/dry cyclic corrosion and the weight loss in *** morphologies of their rust layers were observed by using scanning electron microscopy,and the corrosion performance of these steels was discussed by analyzing the protective *** results show that the corrosion rate of steel A is significantly greater than that of steels B and C in wet/dry cyclic corrosion and weight loss *** corrosion performance of conventional C-Mn-Si TRIP steel is deteriorated in both NaHSO 3 and 3.5 wt.% NaCl aqueous *** superior corrosion performance is exhibited for TRIP steel with low alloying contents due to its high thermodynamic *** enhancement of corrosion performance of TRIP steel is attributed to the additions of alloying elements,such as Al,Cu,Cr,Mo,Ni,*** alloying elements increase the compactness of rust layers,so electrochemical characteristic of TRIP steel is improved.

关键词： TRIP steel alloying element rust layer corrosion performance

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