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| 1 | Ozone sensitivity analysis with the MM5-CMAQ modeling system for Shanghai显示文摘Ozone has become one of the most important air pollution issues around the world. This article applied both O 3 /(NOy-NOx) and H 2 O 2 /HNO 3 indicators to analyze the ozone sensitivity in urban and rural areas of Shanghai, with implementation of the MM5-CMAQ modeling system in July, 2007. The meteorological parameters were obtained by using the MM5 model. A regional emission inventory with spatial and temporal allocation based on the statistical data has been developed to provide input emission data to the MM5-CMAQ modeling system. Results showed that the ozone concentrations in Shanghai show clear regional differences. The ozone concentration in rural areas was much higher than that in the urban area. Two indicators showed that ozone was more sensitive to VOCs in urban areas, while it tended to be NOx sensitive in rural areas of Shanghai. | Li Li Changhong Chen Cheng Huang Haiying Huang Gangfeng Zhang Yangjun Wang Minghua Chen Hongli Wang Yiran Chen D. G. Streets Jiamo Fu | 2011 | Journal of Environmental Sciences2011，23，7： | 18 |
| 2 | SURFACE STRESS EFFECT IN MECHANICS OF NANOSTRUCTURED MATERIALS显示文摘This review article summarizes the advances in the surface stress effect in mechanics of nanostructured elements,including nanoparticles,nanowires,nanobeams,and nanofilms,and heterogeneous materials containing nanoscale inhomogeneities.It begins with the fundamental formulations of surface mechanics of solids,including the definition of surface stress as a surface excess quantity,the surface constitutive relations,and the surface equilibrium equations.Then,it depicts some theoretical and experimental studies of the mechanical properties of nanostructured elements,as well as the static and dynamic behaviour of cantilever sensors caused by the surface stress which is influenced by adsorption.Afterwards,the article gives a summary of the analytical elasto-static and dynamic solutions of a single as well as multiple inhomogeneities embedded in a matrix with the interface stress prevailing.The effect of surface elasticity on the diffraction of elastic waves is elucidated.Due to the difficulties in the analytical solution of inhomogeneities of complex shapes and configurations,finite element approaches have been developed for heterogeneous materials with the surface stress.Surface stress and surface energy are inherently related to crack propagation and the stress field in the vicinity of crack tips.The solutions of crack problems taking into account surface stress effects are also included.Predicting the effective elastic and plastic responses of heterogeneous materials while taking into account surface and interface stresses has received much attention.The advances in this topic are inevitably delineated.Mechanics of rough surfaces appears to deserve special attention due to its theoretical and practical implications.Some most recent work is reviewed.Finally,some challenges are pointed out.They include the characterization of surfaces and interfaces of real nanomaterials,experimental measurements and verification of mechanical parameters of complex surfaces,and the effects of the physical and chemical processes on the surface properties,etc. | Jianxiang Wang Zhuping Huang Huiling Duan Shouwen Yu Xiqiao Feng Gangfeng Wang Weixu Zhang Tiejun Wang | 2011 | Acta Mechanica Solida Sinica2011，24，1： | 11 |
| 3 | New forming method of manufacturing cylindrical parts with nano/ultrafine grained structures by power spinning based on small plastic strains显示文摘A new spinning method to manufacture the cylindrical parts with nano/ultrafine grained structures is proposed, which consists of quenching, power spinning and recrystallization annealing. The microstructural evolution during the different process stages and macroforming quality of the spun parts made of ASTM 1020 steel are investigated. The results show that the microstructures of the ferrites and pearlites in the ASTM 1020 steel are transformed to the lath martensites after quenching. The martensite laths obtained by quenching are refined to 87 nm and a small amount of nanoscale deformation twins with an average thickness of 20 nm is generated after performing a 3-pass stagger spinning with 55% thinning ratio of wall thickness, where the equivalent strain required is only 0.92. The equiaxial ferritic grains with an average size of 160 nm and nano-carbides are generated by subsequent recrystallization annealing at 480°C for 30 min. The spun parts with high dimensional precision and low surface roughness are obtained by the forming method developed in this work, combining quenching with 3-pass stagger spinning and recrystallization annealing. | XIAO GangFeng XIA QinXiang CHENG XiuQua LONG Hu | 2016 | Science China(Technological Sciences)2016，59，11： | 6 |
| 4 | Numerical simulation of dam-break flow and bed change considering the vegetation effects显示文摘Existing numerical investigations of dam-break flows rarely consider the effects of vegetation.This paper presents a depth-averaged two-dimensional model for dam-break flows over mobile and vegetated beds.In the model,both the consequences of reducing space for storing mass and momentum by the existence of vegetation and dragging the flow are considered:the former is considered by introducing a factor(1-c) to the flow depth,where c is the vegetation density;the later is considered by including an additional sink term in the momentum equations.The new governing equations are discretized by the finite volume method;and an existing second-order central-upwind scheme embedded with the hydrostatic reconstruction method for water depth,is used to estimate the fluxes;the source terms are estimated by either explicit or semi-explicit methods fulfilling the stability requirement.Laboratory experiments of dam-break flows or quasi-steady flows with/without vegetation effects/sediment transport are simulated.The good agreements between the measurements and the numerical simulations demonstrate a satisfactory performance of the model in reproducing the flow depth,velocity and bed deformation depth.Numerical case studies of six scenarios of dam-break flows over a mobile and vegetated bed are conducted.It is shown that when the area of the vegetation zone,the vegetation density,and the pattern of the vegetation distribution are varied,the resulted bed morphological change differs greatly,suggesting a great influence of vegetation on the dam-break flow evolution.Specifically,the vegetation may divert the direction of the main flow,hindering the flow and thus result in increased deposition upstream of the vegetation. | Zhiguo He Ting Wu Haoxuan Weng Peng Hu Gangfeng Wu | 2017 | International Journal of Sediment Research2017，32，1： | 5 |
| 5 | SURFACE EFFECTS ON ELASTIC FIELDS AROUND SURFACE DEFECTS显示文摘There are always severe stress concentrations around surface defects like grooves or bugles,which might induce the failure of solid materials and structures.In the present paper,we consider the elastic fields around nanosized bugles and grooves on solid surfaces.The influence of surface elasticity on the elastic deformation is addressed through a finite element method.It is found that when the size of defects shrinks to nanometer,the stress fields around such defects will be affected significantly by surface effects. | Xiaolong Fu Gangfeng Wang~★(SVL,Department of Engineering Mechanics,Xi’an Jiaotong University,Xi’an 710049,China) | 2010 | Acta Mechanica Solida Sinica2010，23，3： | 5 |
| 6 | New materials in solid-phase microextraction显示文摘 | Jianqiao Xu Juan Zheng Jingyu Tian Fang Zhu Feng Zeng Chengyong Su Gangfeng Ouyang | 2013 | Trends in Analytical Chemistry2013，，： | 2 |
| 7 | Preparation of graphene-coated solid-phase microextraction fiber and its application on organochlorine pesticides determination显示文摘 | Yuanyuan Ke Fang Zhu Feng Zeng Tiangang Luan Chengyong Su Gangfeng Ouyang | 2013 | Journal of Chromatography A2013，，： | 2 |
| 8 | Experimental research and numerical simulation of the multi-field performance of cemented paste backfill:Review and future perspectives显示文摘Cemented paste backfill(CPB)technology is a green mining method used to control underground goaves and tailings ponds.The curing process of CPB in the stope is the product of a thermo-hydro-mechanical-chemical multi-field performance interaction.At present,research on the multi-field performance of CPB mainly includes indoor similar simulation experiments,in-situ multi-field performance monitoring experiments,multi-field performance coupling model construction of CPB,and numerical simulation of the multi-field performance of CPB.Because it is hard to study the in-situ multi-field performance of CPB in the real stope,most current research on in-situ multi-field performance adopts the numerical simulation method.By simulating the conditions of CPB in the real stope(e.g.,maintenance environment,stope geometry,drainage conditions,and barricade and backfilling rates),the multi-field performance of CPB is further studied.This paper summarizes the mathematical models employed in the numerical simulation and lists the engineering application cases of numerical simulation in the in-situ multi-field performance of CPB.Finally,it proposes that the multi-field performance of CPB needs to strengthen the theoretical study of multi-field performance,form the strength design criterion based on the multi-field performance of CPB,perform a full-range numerical simulation of the multi-field performance of CPB,develop a pre-warning technology for the CPB safety of CPB,develop automatic and wireless sensors for the multi-field performance monitoring of CPB,and realize the application and popularization of CPB monitoring technology. | Yong Wang Zhenqi Wang Aixiang Wu Liang Wang Qing Na Chen Cao Gangfeng Yang | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，2： | 2 |
| 9 | Laserdiode-excited blue upconversion in Tm^3+/Yb^3+-codoped TeO2- Ga2O3-R2O (R=Li,Na,K) glasses 显示文摘 | Zhao Chun Zhang Qinyuan Yang Gangfeng | 2008 | J Fluoresc2008，，18： | 1 |
| 10 | Optimal Selection Method of Process Patents for Technology Transfer Using Fuzzy Linguistic Computing 显示文摘 | Wang Gangfeng Tian Xitian Geng Junhao | 2014 | Mathematical Problems in Engineering2014，，2014： | 1 |
| 11 | ATOMISTIC CALCULATIONS OF SURFACE ENERGY OF SPHERICAL COPPER SURFACES显示文摘Surface plays an important role in the physical and mechanical behavior of nanostructured materials and elements, however surface energy of curved solid surfaces has not been fully understood. In the present letter, surface energy of spherical particles and cavities in FCC copper is calculated by embedded atom method. The numerical simulations reveal that the distribution of atom energy is non-uniform on the curved surfaces. However, when the radius of spherical cavity or particle is larger than 4 nm, the average surface energy density keeps almost constant irrespective of its location and radius. | Jianjun Bian Gangfeng Wang Xiqiao Feng | 2012 | Acta Mechanica Solida Sinica2012，25，6： | 1 |
| 12 | Automation and optimization of liquid-phase microextraction by gas chromatography显示文摘 | Gangfeng Ouyang Wennan Zhao Janusz Pawliszyn | 2006 | Journal of Chromatography A2006，，1： | 1 |
| 13 | Determination of octylphenol and nonylphenol in aqueous sample using simultaneous derivatization and dispersive liquid–liquid microextraction followed by gas chromatography–mass spectrometry显示文摘 | Shusheng Luo Ling Fang Xiaowei Wang Hongtao Liu Gangfeng Ouyang Chongyu Lan Tiangang Luan | 2010 | Journal of Chromatography A2010，，43： | 1 |
| 14 | THE BOUNDARY LAYER SOLUTIONS OF THE INTERFACE PROBLEM CONSIDERING THE STRAIN GRADIENT显示文摘According to the classical elastic theory,there is always a discontinuity of rotation angleon the interface between different materials.This illogic result can be overcome by the strain gradientplasticity theory.In the light of this theory,there is a group of boundary layer solutions near the in-terface,which have made important adjustment of the classical results. | Wang Gangfeng Yu Shouwen | 1999 | Acta Mechanica Solida Sinica1999，12，3： | 1 |
| 15 | Buoyant force and sinking conditions of a hydrophobic thin rod floating on water显示文摘 | Liu Jianlin Feng Xiqiao Wang Gangfeng | | 0，，： | 1 |
| 16 | Automated polyvinylidene difluoride hollow fiber liquid-phase microextraction of flunitrazepam in plasma and urine samples for gas chromatography/tandem mass spectrometry显示文摘 | Cui ShuFen Tan Shuo Ouyang GangFeng | 2009 | J Chromatogr A2009，1216，12： | 1 |
| 17 | Inversion Tech- nique for Ultrasonic Scattering Measurements 显示文摘 | Zheng Gangfeng Wu Bin He Cunfu Born | 2013 | Journal of Applied Sciences2013，13，21： | 1 |
| 18 | Effective elastic moduli and interface effects of nano-crystalline materials显示文摘Many properties of nanocrystalline materials are associated with interface effects. Based on their micro-structural features, the influence of interfaces on the effective elastic property of nanocrystalline materials is investigated. First, the Mori-Tanaka method is employed to determine the overall effective elastic moduli by considering a nanocrystalline material as a binary composite solid consisting of a crystal or inclusion phase with regular lattice connected by an amorphous-like interface or matrix phase. The effects of strain gradients are then examined on the effective elastic property by using the strain gradient theory to analyze a representative unit cell. Two interface mechanisms are elucidated that influence the effective stiffness and other mechanical properties of materials. One is the softening effect due to the distorted atomic structures and the increased atomic spacings in interface regions, and the other is the baffling effect due to the existence of boundary layers near interfaces. | Gangfeng Wang Xiqiao Feng Shouwen Yu | 2002 | Chinese Science Bulletin2002，47，17： | 1 |
| 19 | Auto-mation and optimization of liquid-phase microextraction by gaschromatography显示文摘 | Gangfeng Ouyanga Wennan Zhao Janusz Pawliszyn | 2007 | J Chromatography A2007，1138，： | 1 |
| 20 | A universal method to calculate the surface energy density of spherical surfaces in crystals显示文摘Surface energy plays an important role in the mechanical performance of nanomaterials; however, determining the surface energy density of curved surfaces remains a challenge. In this paper, we conduct atomic simulations to calculate the surface energy density of spherical surfaces in various crystalline metals. It is found that the average surface energy density of spherical surfaces remains almost constant once its radius exceeds 5 nm. Then, using a geometrical analysis and the scaling law, we develop an analytical approach to estimate the surface energy density of spherical surfaces through that of planar surfaces. The theoretical prediction agrees well with the direct atomic simulations, and thus provides a simple and general method to calculate the surface energy density in crystals. | Jian Wang Jianjun Bian Xinrui Niu Gangfeng Wang | 2017 | Acta Mechanica Sinica2017，33，1： | 1 |
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