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Journal of Iron and Steel Research International 2020年第12期27卷 1363-1371页

作者： fo-quan gu Yuan-bo Zhang guang-hui Li Qiang Zhong Jun Luo Zi-jian Su Ming-jun Rao Zhi-wei Peng Tao Jiang School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina

Effect of distribution of iron concentrates between pelletized and matrix feed on the preparation of blast furnace burdens from two different kinds of fine iron concentrates (magnetite and hematite) by composite agglomeration process (CAP) was explored. It was found that when the mass ratio of iron concentrate A (magnetite) to iron concentrate B (hematite) in the mixed feed was constant, the proportion of iron concentrate A in the pelletized and matrix feed significantly affected the quality of CAP products. Particularly, as the proportion of iron concentrate A in the pelletized feed increased from 0 to 100%, the yield decreased from 82.11% to 79.19% and the tumbler index decreased from 71.33% to 68.27%. The mineralization characterization results indicated that when 100% iron concentrate A was used as the pelletized feed, the crystallization styles of the outer layer and the inner layer of the pellet were different, and a lot of pores exist around hematite and magnetite phases in the pelletized part, with the weak connection of pelletized and matrix part, resulting in poor strength of agglomeration product.

关键词： Composite agglomeration process Sintering Fine iron concentrate Pelletized feed Blast furnace burden

C–C formation mediated by photoinduced electrons from crystallized carbon nitride nanobelts under visible light irradiation

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Journal of Energy Chemistry 2019年第3期28卷 152-161页

作者： Qiaohui Jia Sufen Zhang quan gu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University

Crystal structure and crystallinity of carbon nitride support, size and dispersity of active-metal nanoparticles(NPs), and surface engineering of composites have great roles in generation and separation of photogenerated charge carries and photocatalyzed organic reactions for the conversion of solar energy into chemical energy. Herein, we deposited well-dispersed Pd NPs with small size on crystallized carbon nitride(CN–C) to construct a Schottky-type Pd/CN–C hybrid for photocatalyzed Ullmann C–C homocoupling of aryl halides under visible light irradiation at room temperature. Compared to Pd NPs supported g-C_3N_4(Pd/g-C_3N_4), Pd/CN–C exhibits excellent visible light photocatalytic activity for Ullmann C–C coupling of aryl halides due to high crystallinity of CN–C support, high dispersion and smaller size of Pd NPs, and the interfacial heterojunction of Pd/CN–C. Upon visible light irradiation, more photogenerated electrons from CN–C flow across the Schottky junction to metallic Pd and trigger the Ullmann C–C coupling of aryl halides. The photogenerated holes on CN–C surface are captured by a protic solvent(such as EtOH). In the presence of base K_2CO_3, the solvent undergoes dissociation, dehydrogenation, and finally can be oxidized by captured photogenerated holes. Moreover, Pd/CN–C has general applicability for various substrates and shows excellent stability and reusability for more than nine cycles.

关键词： Crystallized carbon nitride Pd nanoparticles Photocatalyst C–C coupling Ullmann reaction

Across-wind loads and effects of super-tall buildings and structures

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Science China(Technological Sciences) 2011年第10期54卷 2531-2541页

作者： gu Ming quan Yong State Key Laboratory of Disaster Reduction in Civil Engineering Tongji University Shanghai 200092 China

Across-wind loads and effects have become increasingly important factors in the structural design of super-tall buildings and structures with increasing height. Across-wind loads and effects of tall buildings and structures are believed to be excited by inflow turbulence, wake, and inflow-structure interaction, which are very complicated. Although researchers have been focusing on the problem for over 30 years, the database of across-wind loads and effects and the computation methods of equivalent static wind loads have not yet been developed, most countries having no related rules in the load codes. Research results on the across-wind effects of tall buildings and structures mainly involve the determination of across-wind aerodynamic forces and across-wind aerodynamic damping, development of their databases, theoretical methods of equivalent static wind loads, and so on. In this paper we first review the current research on across-wind loads and effects of super-tall buildings and structures both at home and abroad. Then we present the results of our study. Finally, we illustrate a case study in which our research results are applied to a typical super-tall structure.

关键词： super-tall building and structure across-wind aerodynamic force across-wind aerodynamic damping across-wind effects across-wind quivalent static wind loads case study

Programmable quantum Processor with quantum Dot Qubits

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Chinese Physics Letters 2019年第7期36卷 10-13页

作者： Yao Chen fo-Liang Lin Xi Liang Nian-quan Jiang College of Mathematics Physics and Electronic Information Engineering Wenzhou University

The realization of controllable couplings between any two qubits and among any multiple qubits is the critical problem in building a programmable quantum processor(PQP). We present a design to implement these types of couplings in a double-dot molecule system, where all the qubits are connected directly with capacitors and the couplings between them are controlled via the voltage on the double-dot molecules. A general interaction Hamiltonian of n qubits is presented, from which we can derive the Hamiltonians for performing operations needed in building a PQP, such as gate operations between arbitrary two qubits and parallel coupling operations for multigroup qubits. The scheme is realizable with current technology.

关键词： The realization of controllable among any multiple with current technology

Integration of Peridynamic Theory and OpenSees for Solving Problems in Civil Engineering

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Computer Modeling in Engineering & Sciences 2019年第9期120卷 471-489页

作者： quan gu Lei Wang Surong Huang School of Architecture and Civil Engineering Xiamen UniversityXiamen361005China School of Aerospace Engineering Xiamen UniversityXiamen361005China.

Peridynamics(PD)is a powerful method to simulate the discontinuous problems in civil ***,it may take a lot of effort to implement the material constitutive models into PD program for solving a broad range of *** is an open source software which includes a versatile material library and has been widely used by researchers and engineers in civil *** this context,the paper presents a simple but effective approach to integrate PD with OpenSees by using a Client-Server(CS)software integration technique,such that the existing material constitutive models in OpenSees can be directly used by *** applications are presented to verify the new PD-OpenSees *** first one is a plate with a pre-crack subject to horizontal load simulated using a three-dimension(3D)multi-yield-surfaces plasticity model,and the second one is a concrete block with a rectangular hole subject to a uniaxial loading condition simulated using a 3D Cap plasticity *** shows that the generation/propagation of cracks of the elastoplastic materials(e.g.,concrete and soil)can be analyzed by combing PD and three-dimensional plasticity constitutive models without compiling/linking these complex material models into PD ***,the integrated PDOpenSees platform presented herein is potentially capable to solve a wide range of complex problems in civil engineering.

关键词： Peridynamics OpenSees client-server technique Cap plasticity model multiyield surface model

Finite element response sensitivity analysis of three-dimensional soil-foundation-structure interaction (SFSI) systems

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Earthquake Engineering and Engineering Vibration 2018年第3期17卷 555-566页

作者： gu quan Liu Yongdou Li Yong Lin Chun School of Architecture and Civil Engineering Xiamen University Department of Civil and Environmental Engineering University of Alberta

The nonlinear finite element（FE） analysis has been widely used in the design and analysis of structural or geotechnical *** response sensitivities（or gradients） to the model parameters are of significant importance in these realistic engineering *** the sensitivity calculation has lagged behind,leaving a gap between advanced FE response analysis and other research hotspots using the response *** response sensitivity analysis is crucial for any gradient-based algorithms,such as reliability analysis,system identification and structural *** various sensitivity analysis methods,the direct differential method（DDM） has advantages of computing efficiency and accuracy,providing an ideal tool for the response gradient *** paper extended the DDM framework to realistic complicated soil-foundation-structure interaction（SFSI） models by developing the response gradients for various constraints,element and materials *** enhanced framework is applied to three-dimensional SFSI system prototypes for a pilesupported bridge pier and a pile-supported reinforced concrete building frame structure,subjected to earthquake loading *** DDM results are verified by forward finite difference method（FFD）.The relative importance（RI） of the various material parameters on the responses of SFSI system are investigated based on the DDM response sensitivity *** FFD converges asymptotically toward the DDM results,demonstrating the advantages of DDM（e.g.,accurate,efficient,insensitive to numerical noise）.Furthermore,the RI and effects of the model parameters of structure,foundation and soil materials on the responses of SFSI systems are investigated by taking advantage of the sensitivity analysis *** extension of DDM to SFSI systems greatly broaden the application areas of the d gradient-based algorithms,*** model updating and nonlinear system identification of complicated SFSI systems.

关键词： finite element method response sensitivity analysis direct differentiation method finite difference method soil-foundation-structure interaction

Distributed Harmonic Power Sharing with Voltage Distortion Suppression in Islanded Microgrids Considering Non-linear Loads

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 117-128页

作者： guannan Lou Shanlin Li Wei gu quan Yang School of Electrical Engineering Southeast UniversityNanjingJiangsu 210096China the Jiangsu Provincial Key Laboratory of Smart Grid Technology and Equipment Southeast University Dongguan Power Supply Bureau of guangdong Power Grid Company Guangdong 523000China

In contemporary power grids or microgrids,harmonic distortion has emerged as one of the critical power quality issues for utility power grids,which has escalated especially due to the high penetration of power-electronic-converter-interfaced distributed generation(DG).This paper first illustrates the prevalent dispute revolving around the harmonic power sharing and distortion restraint,and subsequently proposes a consensusbased framework that facilitates an accurate sharing of harmonics among multi-DGs connected in parallel,with an effective suppression of the output voltage *** with the majority of existing studies addressing the issue of voltage harmonics at the point of common coupling(PCC),our method primarily emphasizes on the output voltage distortion since the power quality requirement for certain local critical loads is often known to be *** the help of adaptive regulation,the overall distortion produced at the output terminals of DGs can be retained within an acceptable *** working principle of the proposed control method,which is not only easy to implement but also independent of model parameters,is further described in *** the small-signal dynamic model,the system stability and robustness are *** hardware-in-the-loop(HIL)simulations aid in determining the outcome of the proposed strategy in microgrid control.

关键词： Distributed generation droop control harmonic power sharing microgrid voltage distortion mitigation

EXPERT DISCOVERY AND KNOWLEDGE MINING IN COMPLEX MULTI-AGENT SYSTEMS

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Journal of Systems Science and Systems Engineering 2007年第2期16卷 222-234页

作者： Minjie ZHANG Xijin TANG quan BAI Jifa gu School of Computer Science and Software Engineering University of Wollongong Wollongong NSW 2522 Australia Instttute of System Sctence Chinese Academy of Sciences Beijing 100080 China

Complex problem solving requires diverse expertise and multiple techniques. In order to solve such problems, complex multi-agent systems that include both of human experts and autonomous agents are required in many application domains. Most complex multi-agent systems work in open domains and include various heterogeneous agents. Due to the heterogeneity of agents and dynamic features of working environments, expertise and capabilities of agents might not be well estimated and presented in these systems. Therefore, how to discover useful knowledge from human and autonomous experts, make more accurate estimation for experts＇ capabilities and find out suitable expert（s） to solve incoming problems （＂Expert Mining＂） are important research issues in the area of multi-agent system. In this paper, we introduce an ontology-based approach for knowledge and expert mining in hybrid multi-agent systems. In this research, ontologies are hired to describe knowledge of the system. Knowledge and expert mining processes are executed as the system handles incoming problems. In this approach, we embed more self-learning and self-adjusting abilities in multi-agent systems, so as to help in discovering knowledge of heterogeneous experts of multi-agent systems.

关键词： Knowledge discovery knowledge mining expert mining multi-agent system

Experimental study of wind loads on gable roofs of low-rise buildings with overhangs

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Frontiers of Structural and Civil Engineering 2018年第3期12卷 300-317页

作者： Peng HUANG Ling TAO Ming gu Yong quan i University Shanghai 200092China

Gable roofs with overhangs （eaves） are the common constructions of low-rise buildings on the southeastern coast of China, and they were vulnerable to typhoons from experience. The wind pressure distributions on gable roofs of low-rise buildings are investigated by a series of wind tunnel tests which consist of 99 test cases with various roof pitches, height-depth ratios and width-depth ratios. The block pressure coefficients and worst negative （block） pressure coefficients on different roof regions of low-rise buildings are proposed for the main structure and building envelope, respectively. The effects of roof pitch, height-depth ratio, and width-depth ratio on the pressure coefficients of each region are analyzed in detail. In addition, the pressure coefficients on the roofs for the main structure and building envelope are fitted according to roof pitch, height-depth ratio and width-depth ratio of the low-rise building. Meanwhile, the rationality of the fitting formulas is verified by comparing the fitting results with the codes of different countries. Lastly, the block pressure coefficients and worst negative pressure coefficients are recommended to guide the design of low-rise buildings in typhoon area and act as references for the future＇s modification of wind load codes.

关键词： low-rise building gable roof wind loads wind tunnel test block pressure coefficient load code

Covering α-Fe2O3 protection layer on the surface of p-Si micropillar array for enhanced photoelectrochemical performance

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Frontiers of Environmental Science & Engineering 2017年第6期11卷 119-127页

作者： Jing gu Hongtao Yu Xie quan Shuo Chen Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) School of Environmental Science and Technology Dalian University of Technology Dalian 116024 China

The spontaneous oxidation process of pristine silicon （Si） limits its application as photocatalyst or electrode in aqueous solution or moist air. Covering a protection layer on Si surface is an effective approach to overcome this disadvantage. In this paper, α-Fe2O3 is demonstrated to be an excellent alternative as a protection material, α-Fe2O3 layer was deposited around each p-type Si micropillar （SiMP） in well-ordered array by chemical bath ＂deposition ＂method. The diameter of SiMP was 3 μm and the thickness of α-Fe2O3 layer was about 20 nm. The photoeletrochemical stability of SiMP/α-Fe2O3 was proved by 10 circles cyclic voltammetr7 testing. Compared with SiMP, its optical absorption and photocurrent density improved 2 times and 4 times, respectively, and its onset potential for hydrogen evolution moved positively about 0.4 V. These improved performances could be ascribed to the enhanced photogenemted-charge-separation efficiency deriving from built-in electric field at the interface between Si and α-Fe2O3. The above results show an effective strategy to utilize Si material as photocatalyst or electrode in aqueous solution or moist air.

关键词： Si α-Fe2O3 Photoelectrochemistry Photogenemted charge separation