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Travel behavior resilience:Theory,method,and empirical studies

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Journal of Geographical Sciences 2024年第8期34卷 1657-1674页

作者： huang Jie WANG Jiaoe Key Laboratory of Regional Sustainable Development Modelling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Resilience studies have long been a focal point in the fields of geography,social science,urban studies,and ***,resilience studies from multiple disciplines have scrutinized resilience at an individual *** one important behavior in the daily life of human beings,travel behavior is characterized by spatial dependence,spatiotemporal dynamics,and group ***,how to understand the interaction between travel behavior(or demand)and transportation supply and their dynamics is a fundamental question in transportation studies when transportation systems encounter unexpected *** paper refines the definition of travel behavior resilience based on fundamental theories from multiple disciplines,including ecology,transportation engineering,and ***,this paper proposes a conceptual theoretical framework of travel behavior resilience based on the dynamic equilibrium characteristics of transportation supply and *** general,travel behavior has three stages of variation,namely,dramatic reduction,rapid growth,and fluctuation recovery,which have helped capture the travel behavior resilience ***,we construct a corresponding evaluation methodology that is suitable for multiscale and multidimensional *** emphasize that the evaluation of travel behavior resilience should be process-oriented with temporal continuity or capture the inflection points of travel *** multisource big data such as mobile phone signaling data and smart card data,this paper reviews empirical studies on travel behavior resilience,exploring its spatial heterogeneity and group *** location-based analysis,we confirm that people show greater travel behavior resilience in places where people engage in various socioeconomic *** group-based analysis shows that age and socioeconomic attributes of mobility groups significantly affect travel behavior *** behavior resilience can be o

关键词： resilience residential travel social group urban transportation big data

Analysis on Deflection Characteristics of Steel Cable-Stayed Bridge

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第5期35卷 890-895页

作者： Liu Xiaoling huang Qiao Ren Yuan Faculty of Maritime and Transportation Ningbo University School of Transportation Southeast University

Various kinds of deflection characteristics on the steel cable-stayed bridge(Nanjing No.3 Yangtze River Bridge)are investigated by different mathematical statistical ***,via Pearson correlation coefficient calculation,it shows good consistency between the adjacent measuring point of side span or middle ***,taking mid-span deflection as an example,the correlation analysis of deflection and temperature is *** are synchronous via cross correlation coefficient calculation but not completely linear and a"hysteresis loop"phenomenon of three stages is *** fitting result on the monitoring data at day time is consistent with the numerical value through the application of unit temperature difference between the cable and girder and the positive temperature gradient of girder in the finite element *** the temperature effect is *** loads effect is obtained from wavelet *** extracted curve can indirectly reflect the change of traffic ***,the structural damage is analyzed through the trend fusion on the deflection,cable force and visual inspection from 2006 to *** conclusions can provide a basis for management departments to carry out special detection.

关键词： steel cable-stayed bridge health monitoring deflection characteristics analysis

The Recovery Guarantee for Orthogonal Matching Pursuit Method to Reconstruct Sparse Polynomials

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Numerical Mathematics(Theory,Methods and Applications) 2022年第3期15卷 793-818页

作者： Aitong huang Renzhong Feng Sanpeng Zheng School of Mathematics Science&Key Laboratory of Mathematics Informatics and Behavioral SemanticsMinistry of EducationBeihang UniversityBeijingChina

Orthogonal matching pursuit(OMP for short)algorithm is a popular method of sparse signal recovery in compressed *** paper applies OMP to the sparse polynomial reconstruction *** from classical research methods using mutual coherence or restricted isometry property of the measurement matrix,the recovery guarantee and the success probability of OMP are obtained directly by the greedy selection ratio and the probability *** results show that the failure probability of OMP given in this paper is exponential small with respect to the number of sampling *** addition,the recovery guarantee of OMP obtained through classical methods is lager than that of ℓ_(1)-minimization whatever the sparsity of sparse polynomials is,while the recovery guarantee given in this paper is roughly the same as that of ℓ_(1)-minimization when the sparsity is less than ***,the numerical experiments verify the availability of the theoretical results.

关键词： Reconstruction of sparse polynomial uniformly bounded orthogonal system orthogonal matching pursuit method probability of successful reconstruction sub-Gaussian random variable

The first principles investigation of ferrite magnetic response with mismatch stress

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Science China(Physics,Mechanics & Astronomy) 2014年第3期57卷 512-520页

作者： huang JunPing PENG XiangHe HU XianZhi Department of Engineering Mechanics Chongqing University School of Mechanical Engineering Chongqing Vocational Institute of Engineering Faculty of Science Kunming University of Science and Technology

The quasi-ferrite model is proposed and an appropriate PBE exchange functional with the spin density functional theory （SDFT） is selected for the calculation of the relation between magnetic moment and residual stress in ferrite using a quantum mechanics code. The relationship between ferrite magnetism and the carbon content is determined, and then a ferrite interstitial solid solution （ISS） model in a low carbon concentration state is replaced with an a-Fe model in the case of majority magnetic calculation. The band structure of the loaded α-Fe is compared with that of the unloaded a-Fe. The comparison shows that the energy of Fe atomic 3d orbital changes a little, while the energy of electron orbital of iron core below 3d almost keeps un- changed. The relationship between the magnetic moment and the stress appears intermittent due to the Bragg total reflection. The change in the magnetic moment due to lattice mismatch is much larger than that caused by mechanical loading.

关键词： the first-principles calculation SDFT quasi-ferrite lattice mismatch residual stress

Higher order asymptotic behaviour of partial maxima of random sample from generalized Maxwell distribution under power normalization

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Applied Mathematics(A Journal of Chinese Universities) 2018年第2期33卷 177-187页

作者： huang Jian-wen WANG Jian-jun School of Mathematics and Statistics Southwest University Research Center for Artificial Intelligence & Education Big Data Southwest University

In this article, the higher order asymptotic expansions of cumulative distribution function and probability density function of extremes for generalized Maxwell distribution are established under nonlinear normalization. As corollaries, the convergence rates of the distribu- tion and density of maximum are obtained under nonlinear normalization.

关键词： higher order expansion extreme generalized Maxwell distribution nonlinear normalization

Adaptive polarimetric decomposition using incoherent ground scattering models without reflection symmetry assumption

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Geo-Spatial Information Science 2015年第1期18卷 1-10页

作者： Xiaoguang CHENG Wenli huang Jianya GONG Nanjing Research Institute of Electronics Engineering 99 Houbiaoying RoadNanjing 210007China State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan University129 Luoyu RoadWuhan 430079China Department of Geographical Sciences University of MarylandCollege ParkMD 20742USA

Most of the current incoherent polarimetric decompositions employ coherent models to describe ground scattering;however,this cannot truly reflect the fact especially in natural ground *** paper proposes a highly adaptive decomposition with incoherent ground scattering models(ADIGSM).In ADIGSM,Neumann’s adaptive model is employed to describe volume scattering,and to explain cross-polarized power in remainder matrix,so that we can obtain orientation angle randomness for both volume scattering and the dominant ground *** computation of volume scattering parameters is strictly constrained for non-negative eigenvalues,while the volume scattering parameters that explain the most cross-polarized power are *** applying ADIGSM to NASA’s UAVSAR data,the negative component powers were obtained in quite a few forest *** with several newest decompositions,the volume scattering power is obviously lowered,especially in areas dominated by surface scattering or double bounce *** orientation angle randomness of each component is reasonable as *** has potential to be applied in the fields such as PolSAR image classification,land cover mapping,speckle filtering,soil moisture and roughness estimation,etc.

关键词： polarimetric synthetic aperture radar(PolSAR) polarimetric decomposition non-negative eigenvalue decomposition(NNED) scattering model

NUMERICAL SIMULATION OF EFFECTS OF WALL THICKNESS AND CELL DENSITY ON THE THREE-WAY CATALYTIC CONVERTER PERFORMANCE

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Chinese Journal of Mechanical Engineering 2005年第4期18卷 617-622页

作者： Wu Guojiang Tan Song huang Zhen School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200030 China

The transient symmetric mathematical model is established, and the effects of the wall thickness and cell density on the performance of a three-way catalytic converter are studied using numerical modeling. The conclusions show that the light-off time and the pressure drop through a converter are decreased, and the conversion efficiency during the warm-up period keeps almost invariant with reduction of the wall thickness of substrates, and that the pressure drop through a converter and a conversion efficiency during the warm-up state increases, and the light-off time almost keeps invariant when increasing cell density of substrates. Therefore, future catalytic converters should develop in the direction of thin wall thickness and high cell density substrates simultaneously.

关键词： Numerical simulations Advanced catalytic converter Emissions

Development of nitrogen and sulfur-doped carbon dots for cellular imaging

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Journal of Pharmaceutical Analysis 2019年第2期9卷 127-132页

作者： Hui Liu Yue Zhang Chengzhi huang Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) Ministry of EducationCollege of Pharmaceutical SciencesSouthwest University Chongqing Key Laboratory of Biomedical Analysis (Southwest University) Chongqing Science & Technology CommissionCollege of Chemistry and Chemical EngineeringSouthwest University

Heteroatom-doped carbon dots(CDs) have attracted extensive interest because of their improved electronic and fluorescence properties with heteroatom doping. In this study, a new synthetic method for nitrogen(N) and sulfur(S)-doped CDs was developed via a hydrothermal method using methionine and citric acid as raw materials. The as-prepared CDs exhibit excellent optical properties and good biocompatibility. The spherical N,S-doped CDs have an average diameter of 5 nm. They consist of C, O, N and S, and take on excellent water solubility due to the hydroxyl and carboxyl, amino groups on the *** CDs have a photoluminescence quantum yield of 13.8% using quinine sulfate as a reference; the average fluorescence lifetime of the CDs was 3.67 ns. The CDs solution present good photoluminescence properties, and the maximum excitation wavelength and emission wavelength locate at 330 nm and405 nm, respectively. In addition, their fluorescence intensity almost does not change under the conditions of acid, alkali, and high salt, which indicated their anti-photobleaching property and good light stability. Based on the good biocompatibility and strong fluorescence emission of the CDs, they can be used as fluorescent imaging reagents.

关键词： N,S-doped carbon dots Fluorescent reagent Cellular imaging

Analyses of SELEX-derived ZAP-binding RNA aptamers suggest that the binding specificity is determined by both structure and sequence of the RNA

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Protein & Cell 2010年第8期1卷 752-759页

作者： Zhi huang Xinlu Wang Guangxia Gao Key Laboratory of Infection and Immunity Institute of BiophysicsChinese Academy of SciencesBeijing 100101China

The zinc-finger antiviral protein(ZAP)is a host factor that specifically inhibits the replication of certain viruses,including murine leukemia virus,Sindbis virus and Ebola virus,by targeting the viral mRNAs for *** directly binds to the target viral mRNA and recruits the cellular RNA degradation machinery to degrade the *** significant sequence similarity or obvious common motifs have been found in the so far identified target viral *** minimum length of the target sequence is about 500 nt *** workable ZAP-binding RNAs should facilitate further studies on the ZAP-RNA interaction and characterization of such RNAs may provide some insights into the underlying *** this study,we used the SELEX method to isolate ZAP-binding RNA *** 21 rounds of selection,ZAP-binding aptamers were *** analysis revealed that they are G-rich RNAs with predicted stem-loop structures containing conserved“GGGUGG”and“GAGGG”motifs in the loop *** of the aptamer sequence into a luciferase reporter failed to render the reporter sensitive to ***,overexpression of the aptamers modestly but significantly reduced ZAP’s antiviral *** of the conserved motifs of the aptamers significantly impaired their ZAP-binding ability and ZAP-antagonizing activity,suggesting that the RNA sequence is important for specific interaction between ZAP and the target *** aptamers identified in this report should provide useful tools to further investigate the details of the interaction between ZAP and the target RNAs.

关键词： zinc-finger antiviral protein(ZAP) SELEX RNA aptamers