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Freezing-Extraction/Vacuum-Drying Method for Robust and Fatigue-Resistant Polyimide Fibrous Aerogels Article

Kaiqing Yao, Chonghu Song, Hong Fang, Feng Wang, Lian Chen, Shaohua Jiang, Guojun Zha, Haoqing Hou

Engineering 2023, Volume 21, Issue 2,   Pages 152-161 doi: 10.1016/j.eng.2021.08.024

Abstract: In this work, a freeze-extraction method combined with normal vacuum drying (VD), using short electrospunIn addition, the proposed freezing-extraction/VD approach can be extended to other material systems to

Keywords： Polyimide aerogel     Freeze-extraction     Vacuum-drying     Mechanical property     Thermal insulation     Fire retardancy    

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Influence of construction-induced damage on the degradation of freeze–thawed lightweight cellular concrete

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 781-792 doi: 10.1007/s11709-021-0733-9

Abstract: construction-induced damage can be more significant than those from the service environment of LCC, such as freeze–thaw

Keywords： lightweight cellular concrete     construction-induced damage     freeze-thaw action     microstructure     degradation    

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emissions evaluation of the dynamic splitting tensile properties of steel fiber reinforced concrete under freeze–thaw

Frontiers of Structural and Civil Engineering   Pages 1341-1356 doi: 10.1007/s11709-023-0988-4

Abstract: This study empirically investigated the influence of freeze–thaw cycling on the dynamic splitting tensilemm/s) on specimens with four steel fiber contents (0%, 0.6%, 1.2%, and 1.8%) subjected to 0 and 50 freeze–thawThe results quantified using the freeze–thaw damage factor defined in this paper indicate that the degreeof damage to SFRC caused by freeze–thaw cycling was aggravated with increasing loading rate but mitigatedFreeze–thaw action had little effect on the crack types observed during the early and middle stages of

Keywords： steel fiber reinforced concrete     freeze–thaw cycling     Brazilian disc splitting test     acoustic emission    

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Experimental investigation on freeze−thaw durability of polymer concrete

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 1038-1046 doi: 10.1007/s11709-021-0748-2

Abstract: Freeze–thaw is one such test that indicates the ability of concrete to last a long time without a significantIn this study, the freeze–thaw resistance of polymer concrete containing different polymer contents waselasticity, and residual compressive strength were determined for all types of concretes subjected to freeze–thawthat polymer concrete (PC) specimens prepared with higher dosages of polymer contents possessed better freeze–thaw

Keywords： durability test     freeze-thaw resistance     polymer concrete     residual compressive strength     ASTM C666-15    

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Investigation on the freeze-thaw damage to the jointed plain concrete pavement under different climate

Shuaicheng GUO, Qingli DAI, Jacob HILLER

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 2,   Pages 227-238 doi: 10.1007/s11709-017-0426-6

Abstract: Freeze-thaw damage is one of the main threats to the long time performance of the concrete pavement inBased on the Long-Term Pavement Performance (LTPP) data base, the freeze-thaw damage generated by fourdifferent kinds of climate conditions are considered in this project: wet-freeze, wet-non freeze, dry-freezeand dry-non freeze.These two parameters both decrease with service time under freeze condition.

Keywords： LTPP     elastic modulus     k-value     IRI     MEPDG    

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Stress-strain relationship of concrete in freeze-thaw environment

ZOU Chaoying, ZHAO Juan, LIANG Feng

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2,   Pages 184-188 doi: 10.1007/s11709-008-0029-3

Abstract: Adopting the ASTM C666 quick freeze-thaw method, freeze-thaw tests with the number of freeze-thaw cycleswere observed by means of scanning electron microscopy (SEM) in order to detect damages caused by the freeze-thawfrozen-thawed specimens were tested on monotonic axial load; stress-strain testing curves after the freeze-thawThe testing results show that with the increasing time of freeze-thaw cycles, both the internal micro-structuresreference for further research on the behavior and the calculation model of concrete structures in a freeze-thaw

Keywords： stress-strain theoretical     freeze-thaw     capacity     reference     eighteen concrete    

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Influence of freeze–thaw damage gradient on stress–strain relationship of stressed concrete

Frontiers of Structural and Civil Engineering   Pages 1326-1340 doi: 10.1007/s11709-023-0014-x

Abstract: Influence of freeze–thaw damage gradient on stress–strain relationship of stressed concrete

Keywords： strain relationship concrete    

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Biosorption of Cr(III) from aqueous solution by freeze-dried activated sludge: Equilibrium, kinetic and

Qian YAO, Hua ZHANG, Jun WU, Liming SHAO, Pinjing HE,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 3,   Pages 286-294 doi: 10.1007/s11783-010-0025-4

Abstract: Batch biosorption experiments were conducted to remove Cr(III) from aqueous solutions using activated sludge from a sewage treatment plant. An investigation was conducted on the effects of the initial pH, contact time, temperature, and initial Cr(III) concentration in the biosorption process. The results revealed that the activated sludge exhibited the highest Cr(III) uptake capacity (120 mg·g) at 45°C, initial pH of 4, and initial Cr(III) concentration of 100 mg·L. The biosorption results obtained at various temperatures showed that the biosorption pattern accurately followed the Langmuir model. The calculated thermodynamic parameters, Δ (−0.8– −4.58 kJ·mol), Δ (15.6–44.4 kJ·mol), and Δ (0.06–0.15 kJ·mol·K) clearly indicated that the biosorption process was feasible, spontaneous, endothermic, and physical. The pseudo first-order and second-order kinetic models were adopted to describe the experimental data, which revealed that the Cr(III) biosorption process conformed to the second-order rate expression and the biosorption rate constants decreased with increasing Cr(III) concentration. The analysis of the values of biosorption activation energy ( = −7 kJ·mol) and the intra-particle diffusion model demonstrated that Cr(III) biosorption was film-diffusion-controlled.

Keywords： activated sludge     biosorption     chromium     film diffusion     kinetics     thermodynamics    

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Entity and relation extraction with rule-guided dictionary as domain knowledge

Frontiers of Engineering Management   Pages 610-622 doi: 10.1007/s42524-022-0226-0

Abstract: Entity and relation extraction is an indispensable part of domain knowledge graph construction, whichThe existing entity and relation extraction methods that depend on pretrained models have shown promisingEntity extraction models treat characters as basic semantic units while ignoring known character dependencyRelation extraction is based on the hypothesis that the relations hidden in sentences are unified, therebyIn addition, the extraction accuracy of entity relation triplet reaches 83% and 76% on laser industry

Keywords： entity extraction     relation extraction     prior knowledge     domain rule    

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Intracellular trehalose improves the survival of human red blood cells by freeze-drying

HE Hui, LIU Baolin, HUA Zezhao, LI Chuan, WU Zhengzheng

Frontiers in Energy 2007, Volume 1, Issue 1,   Pages 120-124 doi: 10.1007/s11708-007-0014-x

Abstract: Freeze-drying of human red blood cells has a potential important application for blood transfusion.was to investigate the effects of intracellular trehalose on the survival of red blood cells after freeze-dryingblood cells were incubated in trehalose solutions of various concentrations at 37vH for 7 h following freeze-dryingTrehalose, sodium citrate, and human serum albumin were used as extracellular protective agents for the freeze-dryingThe viability of freeze-dried red blood cells increased with the increment of intracellular trehalose
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An extraction- assay system: Evaluation on flavonols in plant resistance to Pb and Cd by supercriticalextraction- gas chromatography

Xu Zhang, Huanhuan Yang, Xinlei Wang, Wen Song, Zhaojie Cui

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 4, doi: 10.1007/s11783-018-1059-2

Abstract:

SFE-GC system is established for flavonols assessment.

Optimal parameters of SFE-GC are evaluated and determined.

Quercetin and kaempferol are detected in plant under heavy metal stress.

Gene expression analysis shows consistent regularity with content of flavonols.

ROS level is applied for elaborating the plant resistance status.

Keywords： Flavonols     Heavy metal     Supercritical carbon dioxide extraction (SFE)     GC     Plant resistance    

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Feature extraction from slice data for reverse engineering

ZHANG Yingjie, LU Shangning

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 25-31 doi: 10.1007/s11465-007-0004-z

Abstract: A new approach to feature extraction for slice data points is presented.

Keywords： feasibility     corresponding     B-spline     pre-determined tolerance     extraction    

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A microextraction approach for rapid extraction and separation of Mn(II) and Co(II) using saponified

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 963-972 doi: 10.1007/s11705-021-2081-7

Abstract: In this paper, we proposed a microextraction approach for the extraction and separation of Mn(II) andThe results showcased that the microextractor can reach the extraction equilibrium within 20 s, therebygreatly reducing necessary extraction time comparing to that of conventional processes.microextraction approach greatly enhances the mass transfer while enabling a continuous and controllable extraction

Keywords： extraction equilibrium     mass transfer coefficient     microextraction     multicomponent extraction     di-(2-    

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Performance evaluation of an improved biomass-fired cogeneration system simultaneously using extraction

Frontiers in Energy 2022, Volume 16, Issue 2,   Pages 321-335 doi: 10.1007/s11708-021-0741-4

Abstract: In place of the traditional single heat source (extraction steam), the extraction steam from the turbine

Keywords： biomass-fired cogeneration     district heat production system     absorption heat pump     extraction steam    

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Study of an artificial boundary condition based on the damping-solvent extraction method

Qiang XU, Jianyun CHEN, Jing LI, Mingming WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 281-287 doi: 10.1007/s11709-012-0167-5

Abstract: The boundary condition was based on the damping-solvent extraction method.The principle of the damping-solvent extraction method was described.Compared with the damping-solvent extraction method, this boundary condition is easier to be applied

Keywords： damping-solvent extraction method     structure-unlimited-foundation system     spring-damper system     artificial    

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Title Author Date Type Operation

Freezing-Extraction/Vacuum-Drying Method for Robust and Fatigue-Resistant Polyimide Fibrous Aerogels

Kaiqing Yao, Chonghu Song, Hong Fang, Feng Wang, Lian Chen, Shaohua Jiang, Guojun Zha, Haoqing Hou

Journal Article

Influence of construction-induced damage on the degradation of freeze–thawed lightweight cellular concrete

Journal Article

emissions evaluation of the dynamic splitting tensile properties of steel fiber reinforced concrete under freeze–thaw

Journal Article

Experimental investigation on freeze−thaw durability of polymer concrete

Journal Article

Investigation on the freeze-thaw damage to the jointed plain concrete pavement under different climate

Shuaicheng GUO, Qingli DAI, Jacob HILLER

Journal Article

Stress-strain relationship of concrete in freeze-thaw environment

ZOU Chaoying, ZHAO Juan, LIANG Feng

Journal Article

Influence of freeze–thaw damage gradient on stress–strain relationship of stressed concrete

Journal Article

Biosorption of Cr(III) from aqueous solution by freeze-dried activated sludge: Equilibrium, kinetic and

Qian YAO, Hua ZHANG, Jun WU, Liming SHAO, Pinjing HE,

Journal Article

Entity and relation extraction with rule-guided dictionary as domain knowledge

Journal Article

Intracellular trehalose improves the survival of human red blood cells by freeze-drying

HE Hui, LIU Baolin, HUA Zezhao, LI Chuan, WU Zhengzheng

Journal Article

An extraction- assay system: Evaluation on flavonols in plant resistance to Pb and Cd by supercriticalextraction- gas chromatography

Xu Zhang, Huanhuan Yang, Xinlei Wang, Wen Song, Zhaojie Cui

Journal Article

Feature extraction from slice data for reverse engineering

ZHANG Yingjie, LU Shangning

Journal Article

A microextraction approach for rapid extraction and separation of Mn(II) and Co(II) using saponified

Journal Article

Performance evaluation of an improved biomass-fired cogeneration system simultaneously using extraction

Journal Article

Study of an artificial boundary condition based on the damping-solvent extraction method

Qiang XU, Jianyun CHEN, Jing LI, Mingming WANG

Journal Article