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Seismic performance of fabricated continuous girder bridge with grouting sleeve-prestressed tendon composite connections

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Frontiers of Structural and Civil Engineering 2023年第6期17卷 827-854页

作者： Jin WANG Weibing XU Xiuli DU Yanjiang CHEN Mengjia DING rong FANG guang yang School of Water Resources and Hydropower Engineering North China Electric Power UniversityBeijing102206China Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit Beijing University of TechnologyBeijing100124China Key Laboratory of Urban Security and Disaster Engineering of China Ministry of Education Beijing University of TechnologyBeijing100124China

The seismic performance of a fully fabricated bridge is a key factor limiting its *** this study,a fiber element model of a fabricated concrete pier with grouting sleeve-prestressed tendon composite connections was built and verified.A numerical analysis of three types of continuous girder bridges was conducted with different piers:a cast-in-place reinforced concrete pier,a grouting sleeve-fabricated pier,and a grouting sleeve-prestressed tendon composite fabricated ***,the seismic performance of the composite fabricated pier was *** results show that the OpenSees fiber element model can successfully simulate the hysteresis behavior and failure mode of the grouted sleeve-fabricated *** traditional non-near-fault ground motions,the pier top displacements of the grouting sleeve-fabricated pier and the composite fabricated pier were less than those of the cast-in-place reinforced concrete *** composite fabricated pier had a good self-centering *** addition,the plastic hinge zones of the grouting sleeve-fabricated pier and the composite fabricated pier shifted to the joint seam and upper edge of the grouting sleeve,*** composite fabricated pier with optimal design parameters has good seismic performance and can be applied in high-intensity seismic areas;however,the influence of pile-soil interaction on its seismic performance should not be ignored.

关键词： seismic performance continuous girder bridge grouting sleeve-prestressed tendon composite connections grouted sleeve connection design parameters

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A review of the current state of biofuels production from lignocellulosic biomass using thermochemical conversion routes

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Chinese Journal of Chemical Engineering 2019年第7期27卷 1523-1535页

作者： Paola Ibarra-Gonzalez Ben-guang rong Department of Chemical Engineering Biotechnology and Environmental Technology University of Southern Denmark

The rapid increase in energy demand,the extensive use of fossil fuels and the urgent need to reduce the carbon dioxide emissions have raised concerns in the transportation *** renewable and sustainable sources have become the ultimate solution to overcome the expected depletion of fossil *** conversion of lignocellulosic biomass to liquid(BtL)transportation fuels seems to be a promising path and presents advantages over first generation biofuels and fossil ***,development of BtL systems is critical to increase the potential of this resource in a sustainable and economic *** of lignocellulosic BtL transportation fuels,such as,gasoline,diesel and jet fuel can be accomplished through various thermochemical processes and processing *** major steps for the production of BtL fuels involve feedstock selection,physical pretreatment,production of bio-oil,upgrading of bio-oil to transportation fuels and recovery of value-added *** present work is aiming to give a comprehensive review of the current process technologies following these major steps and the current scenarios of biomass to liquid facilities for the production of biofuels.

关键词： Biofuels Lignocellulosic biomass Process route Thermochemical conversion Upgrading Separation

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Separation of salidroside from the fermentation broth of engineered Escherichia coli using macroporous adsorbent resins

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Chinese Journal of Chemical Engineering 2022年第4期35卷 260-267页

作者： Xiaocui Sun Xue Liu guang-rong Zhao Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Georgia Tech Shenzhen Institute Tianjin UniversityShenzhen 518071China

Salidroside(8-O-β-D-glucoside of tyrosol),a plant-derived natural product,is used for treatment of hypoxia,fatigue and aging *** availability of salidroside is restricted since it is extracted from3-5 years old Rhodiola roots,which grow very slowly in the cold region of northern hemisphere of *** laboratory has constructed an engineered Escherichia coli and established a fermentation process to produce salidroside from *** this article,nine macroporous resins from polarity to non-polarity,including NKA-9,S-8,AB-8,SP825,D101,LSA-8,LX-12,LX-18 and LX-68 resins,were tested to separate salidroside from fermentation *** static and dynamic experiments,the weakly polar SP825 resin had a better separation efficiency among nine *** adsorption kinetic and isotherm of salidroside on the SP825 resin were determined,and the pseudo-second-order kinetic model and Langmuir model could be fitted *** effects of the pH on adsorption and ethanol concentration on desorption were investigated,and an optimal separation process was *** adsorption for salidroside in the SP825 resin column was conducted with loading 150 ml at pH 7,and desorpted by washing 50 ml of80%ethanol *** the best process conditions,the purity and yield of salidroside in the final product were 91.6%and 74.0%,*** results showed that the macroporous SP825 resin would be feasible and effective to prepare salidroside and has promising application in the downstream process of microbial fermentation.

关键词： Adsorption Desorption Fermentation Macroporous resin Salidroside

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Tailoring sintering-resistant thermal barrier coatings by considering critical healing width of two-dimensional interlamellar pores

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Journal of Advanced Ceramics 2023年第7期12卷 1317-1330页

作者： guang-rong Li Tao Liu Xiao-Tao Luo Guan-Jun yang Chang-Jiu Li State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi'an Jiaotong UniversityXi'an 710049China

Large degradation in thermal insulation and strain tolerance is a main headache and a primary cause of the failure for plasma-sprayed thermal barrier coatings(TBCs)during *** mechanism behind such degradation is the healing of interlamellar pores formed by multiple connections between edges of a pore,which significantly speeds up healing during thermal *** objective of this study is to obtain sintering-resistant TBCs by tailoring the width of interlamellar pores to avoid multiple ***,the mechanism responsible for the multiple connections was *** splat surfaces before and after thermal treatments were characterized via an atomic force microscope(AFM).The roughening of the pore surface occurs during thermal exposure,along with the grain growth inside the ***,the local surface height increases,which causes multiple connections and healing of the interlamellar ***,critical widths of the interlamellar pores for avoiding the multiple connections during thermal exposure are established by correlating the extent of surface roughening with the growth of individual *** height increase of the splat surface and the growth of the grain size(D)were found to increase with the exposure temperature and duration.A relationship linking the height increase and the growth of the grain size induced by thermal exposure in plasma-sprayed ceramic splats was ***,composite TBCs were prepared to form wide interlamellar pores in the *** this design,the increases in the thermal conductivity(λ)and the elastic modulus(E)can be prevented to a large ***,sintering-resistant TBCs that maintain high thermal insulation and strain tolerance,even afer long thermal exposure,can be created.

关键词： thermal barrier coatings(TBCs) air plasma spraying(APS) multiple connections grain growth sintering-resistant structure

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Effect of Land Use on Soil Phosphorus Sorption-Desorption Under Intensive Agricultural Practices in Plastic-Film Greenhouses

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Pedosphere 2014年第3期24卷 367-377页

作者： yang guang-rong HAO Xi-Ying LI Chun-Li LI Yong-Mei Agriculture and Agri-Food Canada Lethbridge Research Centre Yunnan Agricultural University

With rapid urbanization and economic growth, Chinese traditional rice-legume production is increasingly replaced by vegetable and horticultural flower production, which could affect soil properties. This study was conducted near Kunming City, Yunnan Province, Southwest China to investigate how soil phosphorus （P） sorption and desorption processes respond to land use changes and to relate P sorption and desorption parameters to soil properties. Soil samples （0-20, 20-40, 40-60, 60-80 and 80-100 cm） were collected from five sites representing four land use types： rice-legume production in a two-crop, one-year rotation （Rice）, vegetable production in open fields （Vegetable）, recent （〈 3 years） conversion from open fields to plastic-film greenhouse vegetable and flower production at two sites （VFCS1 and VFCS2）, and longer-term （〉 10 years） plastic-film greenhouse vegetable and flower production （VFCL）. The changes in land use affected soil pH, electrical conductivity, available N and P and organic carbon content in topsoil and subsoil. In turn, these changes of soil properties influenced soil P sorption capacity. The P sorption maximum （Smax） was affected by land use types, soil sampling depth and their interactions （P 〈 0.0001）. For surface soil, Smax was in the order of Rice （1 380 mg kg-1）〉 VFCL （1 154 mg kg-1）〉 VFCS2 （897 mg kg-1）〉 VFCS1 （845 mg kg-1）〉 Vegetable （747 mg kg-1）. The lowest Sm^x generally occurred at the surface （except for Rice at 80-100 cm） and increased with depth. The amount of P desorbed during the 8 successive extractions was in the range 23%-44% of sorbed P, and was not affected by land use types or sampling depths. The decreases in Smax suggested that soil P sorption capacity decreased when rice-legume production converted to more intensive vegetation and flower production and caution should be exercised when applying P fertilizer to minimize potential leaching and runoff P loss to the environment.

关键词： flower production P sorption maximum rice-legume production vegetable production

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Expanding Hot Code Path for Data Cleaning on Software Graph

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Computers, Materials & Continua 2020年第5期63卷 743-753页

作者： guang Sun Xiaoping Fan Wangdong Jiang Hangjun Zhou Fenghua Li rong yang Institute of Big Data Hunan University of Finance and EconomicsChangsha410205China School of Engineering University of AlabamaTuscaloosa35487USA

Graph analysis can be done at scale by using Spark GraphX which loading data into memory and running graph analysis in *** this way,we should take data out of graph databases and put it into *** the limitation of memory size,the premise of accelerating graph analytical process reduces the graph data to a suitable size without too much loss of similarity to the original *** paper presents our method of data cleaning on the software *** use SEQUITUR data compression algorithm to find out hot code path and store it as a whole paths directed acyclic *** code path is inherent regularity of a *** 10 to 200 hot code path account for 40%-99%of a program’s execution *** hot paths are acyclic contribute more than 0.1%-1.0%of some execution *** expand hot code path to a suitable size which is good for runtime and keeps similarity to the original graph.

关键词： Hot code path expanded hot path software graph software graph

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Spatiotemporal dynamics of the social structure of Indo-Pacific humpback dolphins(Sousa chinensis)in Xiamen waters from 2007 to 2019

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Zoological Research 2024年第2期45卷 439-450页

作者： Yi Lu Xin-rong Xu Bing-Yao Chen Thomas A Jefferson Holly Fearnbach guang yang Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life SciencesNanjing Normal UniversityNanjingJiangsu 210023China Clymene Enterprises LakesideCalifornia 92040USA Marine Mammal Research SR3SeaLife ResponseRehabilitation and ResearchWA 98275USA Southern Marine Science and Engineering guangdong Laboratory(guangzhou) No.1119Haibin RoadNansha DistrictGuangzhouGuangdong 511458China

As highly social animals,Indo-Pacific humpback dolphins(Sousa chinensis)exhibit community ***,our understanding of the external and internal factors influencing these dynamics,as well as their spatiotemporal variations,is still *** the present study,variations in the social structure of an endangered Indo-Pacific humpback dolphin population in Xiamen Bay,China,were monitored over two distinct periods(2007–2010 and 2017–2019)to analyze the effects of habitat utilization and the composition of individuals within the *** both periods,the population demonstrated a strikingly similar pattern of social differentiation,characterized by the division of individuals into two main clusters and one small ***,the two primary clusters occupied the eastern and western waters,respectively,although the core distribution area of the eastern cluster shifted further eastward between the two *** this distribution shift,the temporal stability of the social structure and inter-associations within the eastern cluster remained unaffected.A subset of 16individuals observed in both periods,comprising 51.6%and 43.2%of the population in each respective period,emerged as a foundational element of the social structure and may be responsible for sustaining social structure stability,especially during the 2007–2010 *** observations suggest that the composition of dominant individuals,an internal factor,had a more substantial influence on the formation of the social network than changes in habitat use,an external ***,the study proposes distinct conservation measures tailored to each of the two main clusters.

关键词： Social differentiation Social structure Sousa chinensis Dynamics Conservation

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The Blow up Analysis of the General Curve Shortening Flow

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Acta Mathematica Sinica,English Series 2011年第11期27卷 2107-2128页

作者： rong Li HUANG Ji guang BAO School of Mathematical Sciences Guangxi Normal University Guilin 541004 P. R. China School of Mathematical Sciences Beijing Normal University Laboratory of Mathematics and Complex Systems Ministry of Education Beijing 100875 P. R. China

It is shown that the curvature function satisfies a nonlinear evolution equation under the general curve shortening flow and a detailed asymptotic behavior of the closed curves is presented when they contract to a poi... 详细信息

关键词： Asymptotic behavior curve shortening flow support function Hausdorff metric

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Electrical Conductivity in Soil Extracts: Chemical Factors and Their Intensity

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Pedosphere 2006年第1期16卷 100-107页

作者： LIU guang-Ming yang Jing-Song YAO rong-Jiang Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China）.

The electrical conductivity （EC） of 1：5 soil-water extract （EC1：5） was studied utilizing path coefficient analysis. The study focused on revealing the main chemical factors contributing to EC of soil extracts and their relative importance. Results showed that the most important factors influencing the EC1：5 of coastal salt-affected soils were the concentration of salt in 1：5 soil-water extract （So）, Cl^-, and the sodium adsorption ratio （SAR）, while effects of pH, CO3^2-, HCO3^, soluble sodium percentage （SSP）, and sodium dianion ratio （SDR） were very weak. Though the direct path coefficients between EC1：5 and SO4^2- , Ca^2＋, Mg^2＋, K^＋, or Na^＋ were not high, influence of other chemical factors caused the coefficients to increase, making the summation of their direct and indirect path coefficients relatively high. Evidences showed that multiple regression relations between EC1：5 and most of the primary factors （So, Cl^-, and SAR） had sound reliability and very good accuracy.

关键词： chemical properties electrical conductivity impact factor soil salinization

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Effects of Lorentz Breaking on the Accretion onto a Schwarzschild-like Black Hole

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Communications in Theoretical Physics 2019年第5期71卷 568-572页

作者： rong-Jia yang He Gao Yao-guang Zheng Qin Wu College of Physical Science and Technology Hebei UniversityBaoding071002China Hebei Key Lab of Optic-Electronic Information and Materials Hebei UniversityBaoding071002China National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices Hebei UniversityBaoding071002China School of Information Engineering Guangdong Medical UniversityDongguan523808China

We formulate and solve the problem of spherically symmetric, steady state, adiabatic accretion onto a Schwarzschild-like black hole obtained recently. We derive the general analytic expressions for the critical points, the critical velocity, the critical speed of sound, and subsequently the mass accretion rate. The case for polytropic gas is discussed in detail. We find the parameter characterizing the breaking of Lorentz symmetry will slow down the mass accretion rate, while has no effect on the gas compression and the temperature profile below the critical radius and at the event horizon.

关键词： accretion mass accretion rate Lorentz breaking Schwarzschild-like black hole

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