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Infinite Complanation for Semi-infinite Problem when Mass Concrete Hit by Cold Wave

Huang Dahai,Wang Congfeng

Strategic Study of CAE 2002, Volume 4, Issue 7,   Pages 33-39

Abstract: Then a semi-infinite plane model for surface temperature calculation is compared with infinite model.If the temperature declining duration of air is no more than the critical time when the disturbed frontperforates half-thickness of the infinite plate, it may be expressed as multi-line process approximatelyIt is also found that the new method to describe declining process of air temperature is more accurateprocess of mass concrete within a short period of time.

Keywords： concrete     temperature in surface zone     semi-infinite model     temperature declining process     equivalent conditionally    

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PM concentration declining saves health expenditure in China

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 7, doi: 10.1007/s11783-023-1690-4

Abstract:

● Monthly hospitalization expenses are sensitive to increases in PM2.5 exposure.

Keywords： Air pollution     Health expenditure     PM2.5 concentration     Economic impact     Heterogeneous effect    

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Effects of temperature on pyrolysis products of oil sludge

LIU Jianguo, SONG Wei, NIE Yongfeng

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 8-14 doi: 10.1007/s11783-008-0030-z

Abstract: Temperature is the determining factor of pyrolysis, which is one of the alternative technologies forThe effects of final operating temperature ranging from 350 to 550°C on pyrolysis products of oil sludgeWith an increase of temperature, the mass fraction of solid residues, liquids, and gases in the finaland energy tend to shift from solid to liquid and gas phase (especially to liquid phase) during the process, and the optimum temperature for oil sludge pyrolysis is 500°C.

Keywords： sludge treatment     corresponding     Temperature     liquid     process    

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Study of the robustness of a low-temperature dual-pressure process for removal of CO

Stefania Moioli, Laura A. Pellegrini, Paolo Vergani, Fabio Brignoli

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 2,   Pages 209-225 doi: 10.1007/s11705-017-1688-1

Abstract: In this work, a new process for the purification of natural gas based on a low temperature distillationThe robustness of the process has been studied by dynamic simulation of an industrial-scale plant, withThe results show that the process can obtain the methane product with a high purity and avoid the solidification

Keywords： CO2 capture     innovative process     cryogenic distillation     dynamic simulation     solid-liquid-vapor    

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Calibration of catalyst temperature in automotive engines over coldstart operation in the presence ofdifferent random noises and uncertainty: Implementation of generalized Gaussian process regression machine

Nasser L. AZAD,Ahmad MOZAFFARI

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4,   Pages 405-412 doi: 10.1007/s11465-015-0354-x

Abstract: to capture the undesired uncertainty and random noises on the key parameters affecting the catalyst temperaturecoldstart operation, calibration of the engine system’s variables, for instance the catalyst temperatureThen, by using a Gaussian process regression machine (GPRM), a reliable model is used for the sake ofpossible to develop a practical calibration tool which can be reliably used for modeling the catalyst temperature

Keywords： automotive engine     calibration     coldstart operation     Gaussian process regression machine (GPRM)     uncertainty    

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Linking key intervention timings to rapid declining effective reproduction number to quantify lessons

Zhihang Peng, Wenyu Song, Zhongxing Ding, Quanquan Guan, Xu Yang, Qiaoqiao Xu, Xu Wang, Yankai Xia

Frontiers of Medicine 2020, Volume 14, Issue 5,   Pages 623-629 doi: 10.1007/s11684-020-0788-3

Abstract: Coronavirus disease 2019 (COVID-19) is currently under a global pandemic trend. The efficiency of containment measures and epidemic tendency of typical countries should be assessed. In this study, the efficiency of prevention and control measures in China, Italy, Iran, South Korea, and Japan was assessed, and the COVID-19 epidemic tendency among these countries was compared. Results showed that the effective reproduction number( ) in Wuhan, China increased almost exponentially, reaching a maximum of 3.98 before a lockdown and rapidly decreased to below 1 due to containment and mitigation strategies of the Chinese government. The in Italy declined at a slower pace than that in China after the implementation of prevention and control measures. The in Iran showed a certain decline after the establishment of a national epidemic control command, and an evident stationary phase occurred because the best window period for the prevention and control of the epidemic was missed. The epidemic in Japan and South Korea reoccurred several times with the fluctuating greatly. The epidemic has hardly rebounded in China due to the implementation of prevention and control strategies and the effective enforcement of policies. Other countries suffering from the epidemic could learn from the Chinese experience in containing COVID-19.

Keywords： COVID-19     epidemic control comparison     Chinese experience    

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Numerical investigation on side heat transfer enhancement in 300 kA aluminum reduction cell

WANG Changhong, ZHU Dongsheng, LEI Junxi, ZHOU Jiemin

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 256-260 doi: 10.1007/s11708-008-0051-0

Abstract: Industrial test and numerical simulation were synchronously applied to analyze the side heat transfer processThe results show that the shell temperature of the test cell and the common cell is respectively 312°of the shell decreases but the thickness of the side ledge increases when the electrolytic temperature, the ambient temperature, the coefficient of heat transfer between molten bath and ledge, the eutectictemperature and the thermo-resistance of the side lining are constant.

Keywords： constant     ambient temperature     thickness     electrolytic temperature     transfer process    

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Degradation of 4-aminophenol by hydrogen peroxide oxidation using enzyme from Serratia marcescens as catalyst

SUN Min, YOU Yahua, DENG Shengsong, GAO Wenxia, YAO Risheng

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1,   Pages 95-98 doi: 10.1007/s11783-007-0018-0

Abstract: of 4-aminophenol whose concentration was 500 mg/L, the optimal conditions were: volume of HO = 3 mL, temperatureIn the degradation process, 4-aminophenol was first converted to benzoquinone and NH, then organic acids

Keywords： degradation process     temperature     effecting     degradation     volume    

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Dilution rate and microstructure of TIG arc Ni-Al powder surfacing layer

SHAN Jiguo, DONG Wei, TAN Wenda, ZHANG Di, REN Jialie

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 20-24 doi: 10.1007/s11465-007-0003-0

Abstract: beads are prepared by a direct current tungsten inert gas arc nickel-aluminum (Ni-Al) powder surfacing processAn assistant cooler, which can potentially reduce the temperature of the base metal, is used in the surfacingprocess and its effect on dilution rate and microstructure is studied.With the use of an assistant cooler on a selected operation condition during the surfacing process, the

Keywords： decrease     Ni-Al     surfacing parameter     temperature     surfacing process    

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Assessment of bridge expansion joints using long-term displacement measurement under changing environmental conditions

Youliang DING, Aiqun LI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 374-380 doi: 10.1007/s11709-011-0122-x

Abstract: The effects of temperature, traffic loading and wind on the expansion joint displacements are analyzedinterpreted, which reveal that measured displacements are observed to increase with an increase in temperatureTwo regression models are developed to simulate the varying displacements under the changes in temperatureStatistical process control using mean value control charts is further used to detect damage to the bridge

Keywords： structural health monitoring     displacement     expansion joint     temperature effect     wind effect     traffic loading     statistical process control     suspension bridge    

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Molecular dynamics modeling of a single diamond abrasive grain in grinding

Angelos P. MARKOPOULOS,Ioannis K. SAVVOPOULOS,Nikolaos E. KARKALOS,Dimitrios E. MANOLAKOS

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 2,   Pages 168-175 doi: 10.1007/s11465-015-0337-y

Abstract: curved path with decreasing depth of cut within the workpiece to simulate the actual material removal process

Keywords： molecular dynamics     abrasive process     chip formation     cutting force     temperature    

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Emerging challenges to structural integrity technology for high-temperature applications

TU Shantung

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 375-387 doi: 10.1007/s11465-007-0066-y

Abstract: The modern needs of structural integrity technology are largely attributed to the increase of service temperatureBesides the needs arising from large-scale high-temperature plants, the high tech developments, suchThe present paper summarizes the recent technical progresses in large process plants and the aviationindustry, micro chemo-mechanical systems, fuel cells, high-temperature electronics, and packaging andThe state-of-the-art of structural integrity technology for high temperature applications is reviewed

Keywords： manufacture     aviation industry     conversion     petrochemical     temperature    

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Phase separation time/temperature dependence of thermoplastics-modified thermosetting systems

ZHANG Xiujuan, XU Yuanze, YI Xiaosu

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 3,   Pages 276-285 doi: 10.1007/s11705-008-0057-5

Abstract: (UCST) or lower critical solution temperature (LCST) were studied with emphasis on the temperature dependencyof the phase separation time and its potential application in the cure time-temperature processing windowWe found that the phase separation time/temperature relationship follows the simple Arrhenius equationWith the established phase separation time-temperature dependence relation, we can easily establish thewhole cure time-temperature transformation (TTT) diagram with morphology information which is a useful

Keywords： separation time-temperature     temperature dependency     cure-induced     separation activation     temperature    

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Elevated temperature creep model of parallel wire strands

Frontiers of Structural and Civil Engineering   Pages 1060-1071 doi: 10.1007/s11709-023-0981-y

Abstract: existing approach to analyze their creep behavior, this study experimentally investigated the elevated temperaturecamera system was incorporated to accurately obtain the deformation of the specimen during the elevated temperatureIt was concluded that the temperature level had a more significant effect on the creep strain than theBy comparing the elevated temperature creep test results for PWSs and steel strands, it was found thatthe creep strain of PWSs was lower than that of steel strands at the same temperature and stress levels

Keywords： parallel wire strands     experimental study     elevated temperature creep model    

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Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 158-164 doi: 10.1007/s11709-009-0002-9

Abstract: A field test was conducted to investigate the distribution of temperature field and the variation ofThe change of hydration heat temperature consists of four periods: temperature rising period, constanttemperature period, rapid temperature fall period and slow temperature fall period.The peak value of hydration heat temperature increases with the increasing casting temperature of concreteAccording to field tests, the thermal stress incurred by hydration heat may induce temperature cracks

Keywords： box-girder bridge     field test     hydration heat     temperature field     temperature gradient     thermal stress    

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Title Author Date Type Operation

Infinite Complanation for Semi-infinite Problem when Mass Concrete Hit by Cold Wave

Huang Dahai,Wang Congfeng

Journal Article

PM concentration declining saves health expenditure in China

Journal Article

Effects of temperature on pyrolysis products of oil sludge

LIU Jianguo, SONG Wei, NIE Yongfeng

Journal Article

Study of the robustness of a low-temperature dual-pressure process for removal of CO

Stefania Moioli, Laura A. Pellegrini, Paolo Vergani, Fabio Brignoli

Journal Article

Calibration of catalyst temperature in automotive engines over coldstart operation in the presence ofdifferent random noises and uncertainty: Implementation of generalized Gaussian process regression machine

Nasser L. AZAD,Ahmad MOZAFFARI

Journal Article

Linking key intervention timings to rapid declining effective reproduction number to quantify lessons

Zhihang Peng, Wenyu Song, Zhongxing Ding, Quanquan Guan, Xu Yang, Qiaoqiao Xu, Xu Wang, Yankai Xia

Journal Article

Numerical investigation on side heat transfer enhancement in 300 kA aluminum reduction cell

WANG Changhong, ZHU Dongsheng, LEI Junxi, ZHOU Jiemin

Journal Article

Degradation of 4-aminophenol by hydrogen peroxide oxidation using enzyme from Serratia marcescens as catalyst

SUN Min, YOU Yahua, DENG Shengsong, GAO Wenxia, YAO Risheng

Journal Article

Dilution rate and microstructure of TIG arc Ni-Al powder surfacing layer

SHAN Jiguo, DONG Wei, TAN Wenda, ZHANG Di, REN Jialie

Journal Article

Assessment of bridge expansion joints using long-term displacement measurement under changing environmental conditions

Youliang DING, Aiqun LI

Journal Article

Molecular dynamics modeling of a single diamond abrasive grain in grinding

Angelos P. MARKOPOULOS,Ioannis K. SAVVOPOULOS,Nikolaos E. KARKALOS,Dimitrios E. MANOLAKOS

Journal Article

Emerging challenges to structural integrity technology for high-temperature applications

TU Shantung

Journal Article

Phase separation time/temperature dependence of thermoplastics-modified thermosetting systems

ZHANG Xiujuan, XU Yuanze, YI Xiaosu

Journal Article

Elevated temperature creep model of parallel wire strands

Journal Article

Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG

Journal Article