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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 35-50页

作者： Tang Yuchuan wang jiankang Wu Gang School of Civil Engineering Southeast UniversityKey Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of EducationNanjing 211102China National and Local Joint Engineering Research Center for Intelligent Construction and Maintenance Nanjing 211102China

In seismology and earthquake engineering,it is fundamental to identify and characterize the pulse-like features in pulse-type ground *** capture the pulses that dominate structural responses,this study establishes congruence and shift relationships between response spectrum surfaces.A similarity search between spectrum surfaces,supplemented with a similarity search in time series,has been applied to characterize the pulse-like features in pulse-type ground *** identified pulses are tested in predicting the rocking consequences of slender rectangular blocks under the original ground ***,the prediction is promising for the majority of the ground motions where the dominant pulse is correctly identified.

关键词： velocity pulse ground motion surface similarity rocking overturning

Effect of calcination temperature on structure and performance of Ni/TiO_2-SiO_2 catalyst for CO_2 reforming of methane

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Journal of Natural Gas Chemistry 2008年第2期17卷 179-183页

作者： Sanbing Zhang jiankang wang Xiaolai wang State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 Gansu China Graduate University of the Chinese Academy of Sciences Beijing 100039 China

The influence of calcination temperature on the structure and catalytic behavior of Ni/TiO2-SiO2 catalyst, for CO2 reforming of methane to synthesis gas under atmospheric pressure, was investigated. The results showed that the Ni/TiO2-SiO2 catalyst calcined at 700 ℃ had high and stable activity while the catalysts calcined at 550 and 850 ℃ had low and unstable activity. Depending on the calcination temperature, one, two, or three of the following Ni-containing species, NiO, Ni2.44Ti0.72Si0.07O4, and NiTiO3 were identified by combining the temperature programmed reduction （TPR） and X-ray diffraction （XRD） results. Their reducibility decreased in the sequence： NiO〉Ni2.44Ti0.72Si0.07O4〉NiTiO3. It suggests that high and stable activities observed over the Ni/TiO2-SiO2 catalyst calcined at 700 ~C were induced by the formation of Ni2.44Ti0.72Si0.07O4 and smaller NiO species crystallite size.

关键词： Ni/TiO2-SiO2 catalyst sol-gel CO2 reforming methane

Metal-organic framework-derived Ni doped Co_(3)S_(4) hierarchical nanosheets as a monolithic electrocatalyst for highly efficient hydrogen evolution reaction in alkaline solution

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Chinese Journal of Chemical Engineering 2022年第2期35卷 380-388页

作者： jiankang wang Yajing wang Zhongping Yao Zhaohua Jiang School of Chemistry and Chemical Engineering State Key Laboratory of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin 150001China College of Materials Science and Engineering Yangtze Normal UniversityChongqing 408100China

Hierarchical nanostructure construction and electronic structure engineering are commonly employed to increase the electrocatalytic activity of HER ***,Ni doped Co_(3)S_(4) hierarchical nanosheets on Ti mesh(Ni doped Co_(3)S_(4) HNS/TM)were successfully prepared by using metal organic framework(MOF)as precursor which was synthesized under ambient *** results confirmed this structure and Ni incorporation into Co_(3)S_(4) lattice as well as the modified electronic structure of Co_(3)S_(4) by Ni *** HER performance showed that Ni doped Co_(3)S_(4) HNS/TM presented outstanding HER activity with 173 m V overpotential at-10 m A·cm^(-2),surpassing most of metal sulfide-based *** hierarchical structure,superior electrical conductivity and electronic structure modulation contributed to the accelerated water dissociation and enhanced intrinsic *** work provides a new avenue for synthesizing hierarchical nanostructure and simultaneously tuning the electronic structure to promote HER performance,which has potential application in designing highly efficient and cost-effective HER nanostructured electrocatalyst.

关键词： Metal-organic framework Electronic structure Ni doped Co_(3)S_(4) Electrochemistry Catalysis Hydrogen production

Influence of ammonia and Brown gas injection on the iron ore sintering characteristics under biochar substitution

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Particuology 2024年第11期94卷 16-28页

作者： Laiquan Lv jiankang wang Hanxiao Meng Hao Zhou State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou310027China

The influence of ammonia and Brown gas injection on the iron ore sintering characteristics was explored through sintering pot experiments based on biochar substitution to increase biochar substitution proportion and reduce fossil energy *** dividing the high-temperature stage of the sintering bed,the heating rate and cooling rate were calculated,and the reasons for poor sintering quality under a high biochar substitution ratio were *** results showed that under the 40%biochar substitution ratio,the cooling rate of the sintering bed significantly increased,the high-temperature duration time was short,and the sintering quality deteriorated *** injection of 0.5–1%vol ammonia or 1–2%vol Brown gas can reduce the cooling rate,prolong the high-temperature duration,and optimize the sintering *** on 1%vol ammonia or 2%vol Brown gas injection,reducing the proportion of biochar with equal calorific value further increases the sintering comprehensive index,which means that using 1%vol ammonia or 2%vol Brown gas injection to assist sintering can reduce the proportion of coke usage to 60%,while the proportion of biochar substitution is 33.76%and 32.47%,*** research results provide an effective solution for low-carbon sintering.

关键词： NH_(3)injection Brown gas injection Biochar substitution Iron ore sintering Coke consumption reduction

Flow behavior in microchannel made of different materials with wall slip velocity and electro-viscous effects

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Acta Mechanica Sinica 2010年第1期26卷 73-80页

作者： Lei wang jiankang Wu Department of Mechanics Huazhong University of Science and Technology Wuhan National Laboratory of Optoelectronics 430074 Wuhan China

In a microfluidic system, flow slip velocity on a solid wall can be the same order of magnitude as the average velocity in a microchannel. The flow-electricity interaction in a complex microfluidic system subjected to joint action of wall slip and electro-viscous effect is an important topic. This paper presents an analytic solution of pressuredriven liquid flow velocity and flow-induced electric field in a two-dimensional microchannel made of different materials with wall slip and electro-viscous effects. The Poisson- Boltzmann equation and the Navier-Stokes equation are solved for the analytic solutions. The analytic solutions agree well with the numerical solutions. It was found that the wall slip amplifies the fow-induced electric field and enhances the electro-viscous effect on flow. Thus the electro-viscous effect can be significant in a relatively wide microchannel with relatively large kh, the ratio of channel width to thickness of electric double layer, in comparison with the channel without wall slip.

关键词： Microchannel Wall slip - Electro-viscous effects

Linkage analysis and integrated software GAPL for pure-line populations derived from four-way and eight-way crosses

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The Crop Journal 2019年第3期7卷 283-293页

作者： Luyan Zhang Lei Meng jiankang wang The National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop Sciences Chinese Academy of Agricultural Sciences

Pure lines derived from multiple parents provide abundant variation for genetic ***,efficient genetic analysis methods and user-friendly software are still *** this study, we developed linkage analysis methods and integrated analysis software for pure-line populations derived from four-way and eight-way ***, polymorphic markers are classified into different categories according to the number of identifiable alleles in the inbred *** genotypic probability is then derived for each pair of complete markers, and based on them a maximum likelihood estimate(MLE) of recombination frequency is *** EM algorithm is proposed for calculating recombination frequencies in scenarios that at least one marker is incomplete.A linkage map can thus be constructed using estimated recombination *** describe a software package called GAPL for recombination frequency estimation and linkage map construction in multi-parental pure-line *** simulation studies and results from a reported four-way cross recombinant inbred line population demonstrate that the proposed method and software can build more accurate linkage maps in shorter times than other published software *** GAPL software is freely available from *** and can also be used for QTL mapping in multi-parental populations.

关键词： Pure lines Four-way cross Eight-way cross Recombination frequency estimation Integrated software

The Statistical Power of Inclusive Composite Interval Mapping in Detecting Digenic Epistasis Showing Common F_2 Segregation Ratios

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Journal of Integrative Plant Biology 2012年第4期54卷 270-279页

作者： Luyan Zhang Huihui Li jiankang wang Institute of Crop Sciences The National Key Facility for Crop Gene Resources and Genetic Improvementand CIMMYT ChinaChinese Academy of Agricultural SciencesBeijing 100081China

Epistasis is a commonly observed genetic phenomenon and an important source of variation of complex traits, which could maintain additive variance and therefore assure the long-term genetic gain in breeding. Inclusive composite interval mapping （ICIM） is able to identify epistatic quantitative trait loci （QTLs） no matter whether the two interacting QTLs have any additive effects. In this article, we conducted a simulation study to evaluate detection power and false discovery rate （FDR） of ICIM epistatic mapping, by considering F2 and doubled haploid （DH） populations, different F2 segregation ratios and population sizes. Results indicated that estimations of QTL locations and effects were unbiased, and the detection power of epistatic mapping was largely affected by population size, heritability of epistasis, and the amount and distribution of genetic effects. When the same likelihood of odd （LOD） threshold was used, detection power of QTL was higher in F2 population than power in DH population; meanwhile FDR in F2 was also higher than that in DH. The increase of marker density from 10 cM to 5 cM led to similar detection power but higher FDR. In simulated populations, ICIM achieved better mapping results than multiple interval mapping （MIM） in estimation of QTL positions and effect. At the end, we gave epistatic mapping results of ICIM in one actual population in rice （Oryza sativa L.）.

关键词： Epistasis false discovery rate inclusive composite interval mapping power analysis simulation study.

A New Hybrid Control Scheme for an Integrated Helicopter and Engine System

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Chinese Journal of Aeronautics 2012年第4期25卷 533-545页

作者： ZHANG Haibo wang jiankang CHEN Guoqiang YAN Changkai College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

A new hybrid control scheme is presented with a robust multiple model fusion control（RMMFC） law for a UH-60 helicopter and an active disturbance rejection control（ADRC） controller for its *** scheme is a control design method with every subsystem designed separately but fully considering the couplings between *** three subspaces with respect to forward flight velocity,a RMMFC is proposed to devise a four-loop reference signal tracing control for the helicopter,which escapes the closed-loop system from unstable state due to the extreme complexity of this integrated nonlinear *** engines are controlled by the proposed ADRC decoupling controller,which fully takes advantage of a good compensation ability for unmodeled dynamics and extra disturbances,so as to compensate torque disturbance in power turbine speed *** simulating a forward acceleration flight task,the RMMFC for the helicopter is *** is apparent that the integrated helicopter and engine system（IHES） has much better dynamic performance under the new control *** in the switching process,the large transient is significantly weakened,and smooth transition among candidate controllers is *** the entire simulation task,the droop of power turbine speed with the proposed ADRC controller is significantly slighter than with the conventional PID controller,and the response time of the former is much faster than the *** simulating a rapid climb and descent flight task,the results also show the feasibility for the application of the proposed multiple model fusion *** there is aggressive power demand in this maneuver,the droop of power turbine speed with an ADRC controller is smaller than using a PID *** control performance for helicopter and engine is enhanced by adopting this hybrid control scheme,and simulation results in other envelope state give proofs of robustness for this new scheme.

关键词： helicopter engine hybrid control robust multiple model fusion control active disturbance rejection control PID control

Investigation on the evolution characteristics of bed porous structure during iron ore sintering

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Particuology 2023年第3期74卷 35-47页

作者： jiankang wang Pengnan Ma Hanxiao Meng Fangzheng Cheng Hao Zhou State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou310027China

To better understand the evolution characteristics of bed porous structure during iron ore sintering,X-ray computed tomography scanning technology was used to analyze the pore parameters in different areas of the sintering bed.A pore skeleton structure model was established to study the characteristics of the airflow channels in different *** absolute permeability of different areas was calculated through simulation,and the corresponding streamline and pressure drop distribution were *** results show that the porosity of raw material zone,high-temperature zone,and sintered zone increases gradually,which are 37.69%,46.41%,and 55.57%,*** absolute permeability calculation results of the raw material zone and sintered zones are 792.49μm^(2) and 20560.80μm^(2),while the tortuosity is 1.77 and 1.45,*** with the raw material zone,the flow streamline in the sintered zone is thicker and denser,the airflow resistance and the pressure drop are minor.

关键词： Flame front Porous bed structure Iron ore sintering

Ordering of high-density markers by the k-Optimal algorithm for the traveling-salesman problem

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The Crop Journal 2020年第5期8卷 701-712页

作者： Luyan Zhang Huihui Li Lei Meng jiankang wang National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Construction of accurate and high-density linkage maps is a key research area of *** investigated the efficiency of genetic map construction(MAP)using modifications of the k-Optimal(k-Opt)algorithm for solving the traveling-salesman problem(TSP).For TSP,different initial routes resulted in different optimal *** most optimal solution could be found only by use of as many initial routes as *** for MAP,a large number of initial routes resulted in one optimal order.k-Opt using open route length gave a slightly higher proportion of correct orders than the method of adding one virtual marker and using closed route *** frequency(REC)and logarithm of odds(LOD)score gave similar proportions of correct order,higher than that given by genetic *** missing markers and genotyping error reduced ordering accuracy,but the best order was still achieved with high probability by comparison of the optimal orders from multiple initial *** time increased rapidly with marker number,and 2-Opt took much less time than *** 2-Opt algorithm was compared with ordering methods used in two other software *** best method was 2-Opt using open route length as the criterion to identify the optimal order and using REC or LOD as the measure of distance between *** describe a unified software interface for using k-Opt in high-density linkage map construction for a wide range of genetic populations.

关键词： optimal algorithm traveling