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Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 239-248 doi: 10.1007/s11709-011-0110-1

Abstract: Surcharge load (e.g. embankment fill) will induce settlement and outward lateral displacement, while vacuumIdeally, combination of surcharge load and vacuum pressure can reduce or minimize the lateral displacementthe main influencing factors on lateral displacement of a soft clayey ground under the combination of vacuumthat the outward lateral displacement increases with the increase of the ratio of surcharge load to vacuumTo predict the lateral displacement of a ground under the combination of surcharge load and vacuum pressure

Keywords： vacuum consolidation     lateral displacement     PVD     finite element analysis     surcharge load    

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Numerical study of conduction and radiation heat losses from vacuum annulus in parabolic trough receivers

Dongqiang LEI, Yucong REN, Zhifeng WANG

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 1048-1059 doi: 10.1007/s11708-020-0670-7

Abstract: Parabolic trough receiver is a key component to convert solar energy into thermal energy in the parabolic trough solar system. The heat loss of the receiver has an important influence on the thermal efficiency and the operating cost of the power station. In this paper, conduction and radiation heat losses are analyzed respectively to identify the heat loss mechanism of the receiver. A 2-D heat transfer model is established by using the direct simulation Monte Carlo method for rarefied gas flow and heat transfer within the annulus of the receiver to predict the conduction heat loss caused by residual gases. The numerical results conform to the experimental results, and show the temperature of the glass envelope and heat loss for various conditions in detail. The effects of annulus pressure, gas species, temperature of heat transfer fluid, and annulus size on the conduction and radiation heat losses are systematically analyzed. Besides, the main factors that cause heat loss are analyzed, providing a theoretical basis for guiding the improvement of receiver, as well as the operation and maintenance strategy to reduce heat loss.

Keywords： parabolic trough receiver     vacuum annulus     rarefied gas     DSMC (direct simulation Monte Carlo)     heat loss    

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interconnected nano-channels into polyvinylidene fluoride membranes for desalination applications by vacuum

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1162-1182 doi: 10.1007/s11705-022-2276-6

Abstract: to fabricate lycopodium/polyvinylidene fluoride flat-sheet membrane for desalination applications by vacuumIn vacuum membrane distillation experiments, using a 15000 ppm NaCl solution as a feed at 70 °C, the

Keywords： lycopodium     hydrophobicity     vacuum membrane distillation     desalination    

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Novel methods by using non-vacuum insulated tubing to extend the lifetime of the tubing

Chenglong ZHOU,Guojin ZHU,Yongxiang XU,Jifei YU,Xiaoliang ZHANG,Hongzhi SHENG

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 142-147 doi: 10.1007/s11708-015-0357-7

Abstract: The analysis of the failure mechanics, namely hydrogen permeation of vacuum insulated tubing (VIT), indicatedTo solve this problem, some measures by using non-vacuum materials were proposed and analyzed in this

Keywords： vacuum insulated tubing     cyclic steam stimulation     insulation material     thermal conductivity     foam-glass    

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Toward better understanding vacuum ultraviolet–iodide induced photolysis via hydrogen peroxide formation

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-021-1489-0

Abstract:

• UV/VUV/I– induces substantial H2O2 and IO3– formation, but UV/I– does not.

Keywords： Vacuum ultraviolet     Hydrogen peroxide     Iodate     Hydroxyl radical     Redox transition    

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Research on fuzzy neural network control method for high-frequency vacuum drying of wood

Jiang Bin,Sun Liping,Cao Jun and Zhou Zheng

Strategic Study of CAE 2014, Volume 16, Issue 4,   Pages 17-20

Abstract:

High- frequency vacuum combined wood drying is a kind of fast dryingOn the basis of theoretical analysis with high frequency in wood vacuum drying process，the fuzzy controller

Keywords： high-frequency vacuum     wood drying     fuzzy neural network    

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Enhancement of distillate output of double basin solar still with vacuum tubes

Hitesh N PANCHAL, P K SHAH

Frontiers in Energy 2014, Volume 8, Issue 1,   Pages 101-109 doi: 10.1007/s11708-014-0299-5

Abstract: The performance of the double basin solar still was also increased by attaching vacuum tubes to the lowerproposed a novel approach to increase the distillate output of the double basin solar still attached with vacuumThe integration of vacuum tubes with solar still greatly increases the distillate output of the solar

Keywords： double basin solar still     calcium stones     pebbles     granite gravel     distillate output    

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Molecular size characterization of heavy oil fractions in vacuum and solution by molecular dynamic simulation

Wenpo REN, Honggang CHEN, Chaohe YANG, Honghong SHAN,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 250-256 doi: 10.1007/s11705-009-0281-7

Abstract: And then, the most stable conformations of polycyclic aromatic and heavy resin in vacuum and toluenethat the radius of gyration of polycyclic aromatic and heavy resin was 0.55–0.70 nm in vacuumWith molecular weight increasing, the molecular size in vacuum and toluene solution also increased.Thus, the molecular size in toluene solution was larger than that in vacuum.

Keywords： dynamic simulation     molecular dynamic     behavior     molecule     Adsorption Chromatography    

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Technological Development of High Speed Maglev System Based on Low Vacuum Pipeline

Feng Zhongwei, Fang Xing, Li Hongmei, Cheng Aijun, Pan Yongjie

Strategic Study of CAE 2018, Volume 20, Issue 6,   Pages 105-111 doi: 10.15302/J-SSCAE-2018.06.017

Abstract: the magnetic levitation technique to reduce wheel-rail friction and vibration, construction of a low vacuumThis paper expounds the significance of developing a high speed maglev system based on low vacuum pipelines

Keywords： rail transit     low vacuum pipes     high speed maglev     system technology    

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Vacuum promotes metabolic shifts and increases biogenic hydrogen production in dark fermentation systems

Haifa RAJHI,Daniel PUYOL,Mirna C. MARTÍNEZ,Emiliano E. DÍAZ,José L. SANZ

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 3,   Pages 513-521 doi: 10.1007/s11783-015-0777-y

Abstract: four synthetic media, two industrial wastewater, and one domestic effluent) and the effect of applying vacuumThe application of vacuum promoted an increase in the diversity of hydrogen-producing bacteria, suchNevertheless, reduction of the hydrogen partial pressure by application of vacuum lead to further oxidationInterestingly, vacuum greatly promoted biogenic hydrogen production from a real wastewater, which opens

Keywords： dark fermentation     biohydrogen     wastewaters     vacuum    

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Novel technologies for the lost foam casting process

Wenming JIANG, Zitian FAN

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1,   Pages 37-47 doi: 10.1007/s11465-018-0473-2

Abstract: problems, the present study developed several novel LFC technologies, namely, LFC technologies under vacuumThe results showed that the LFC under vacuum and low pressure evidently improved the filling ability

Keywords： LFC under vacuum and low pressure     vibration solidification     pressure solidification     expendable shell casting    

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Thermal/vacuum calibration of microwave humidity sounder on FY-3B satellite

Wang Zhenzhan,Zhang Shengwei,Li Jing,Li Yun,Wu Qiong

Strategic Study of CAE 2013, Volume 15, Issue 10,   Pages 33-46

Abstract:

The principle and methods on thermal/vacuum (T/V) testing of microwave

Keywords： FY-3B satellite     microwave humidity sounder     prelaunch calibration     thermal/vacuum testing    

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Multifunctional antimicrobial chlorhexidine polymers by remote plasma assisted vacuum deposition

Ana Mora-Boza, Francisco J. Aparicio, María Alcaire, Carmen López-Santos, Juan P. Espinós, Daniel Torres-Lagares, Ana Borrás, Angel Barranco

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 2,   Pages 330-339 doi: 10.1007/s11705-019-1803-6

Abstract: Novel antibacterial materials for implants and medical instruments are essential to develop practical strategies to stop the spread of healthcare associated infections. This study presents the synthesis of multifunctional antibacterial nanocoatings on polydimethylsiloxane (PDMS) by remote plasma assisted deposition of sublimated chlorhexidine powders at low pressure and room temperature. The obtained materials present effective antibacterial activity against K12, either by contact killing and antibacterial adhesion or by biocide agents release depending on the synthetic parameters. In addition, these multifunctional coatings allow the endure hydrophilization of the hydrophobic PDMS surface, thereby improving their biocompatibility. Importantly, cell-viability tests conducted on these materials also prove their non-cytotoxicity, opening a way for the integration of this type of functional plasma films in biomedical devices.

Keywords： plasma polymers     conformal plasma deposition     chlorhexidine     bactericide     PDMS     biocompatibility    

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The design of pulse vacuum sterilizer based on fuzzy data fusion

Chen Shuangye

Strategic Study of CAE 2008, Volume 10, Issue 7,   Pages 69-72

Abstract:

The hardware and software of a pulse vacuum sterilizer are designed inFinally the simulations and experiments of pulse vacuum disinfection control system are carried out,

Keywords： fuzzy control     microcontroller     sterilizer    

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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 electrospun

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

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Title Author Date Type Operation

Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Journal Article

Numerical study of conduction and radiation heat losses from vacuum annulus in parabolic trough receivers

Dongqiang LEI, Yucong REN, Zhifeng WANG

Journal Article

interconnected nano-channels into polyvinylidene fluoride membranes for desalination applications by vacuum

Journal Article

Novel methods by using non-vacuum insulated tubing to extend the lifetime of the tubing

Chenglong ZHOU,Guojin ZHU,Yongxiang XU,Jifei YU,Xiaoliang ZHANG,Hongzhi SHENG

Journal Article

Toward better understanding vacuum ultraviolet–iodide induced photolysis via hydrogen peroxide formation

Journal Article

Research on fuzzy neural network control method for high-frequency vacuum drying of wood

Jiang Bin,Sun Liping,Cao Jun and Zhou Zheng

Journal Article

Enhancement of distillate output of double basin solar still with vacuum tubes

Hitesh N PANCHAL, P K SHAH

Journal Article

Molecular size characterization of heavy oil fractions in vacuum and solution by molecular dynamic simulation

Wenpo REN, Honggang CHEN, Chaohe YANG, Honghong SHAN,

Journal Article

Technological Development of High Speed Maglev System Based on Low Vacuum Pipeline

Feng Zhongwei, Fang Xing, Li Hongmei, Cheng Aijun, Pan Yongjie

Journal Article

Vacuum promotes metabolic shifts and increases biogenic hydrogen production in dark fermentation systems

Haifa RAJHI,Daniel PUYOL,Mirna C. MARTÍNEZ,Emiliano E. DÍAZ,José L. SANZ

Journal Article

Novel technologies for the lost foam casting process

Wenming JIANG, Zitian FAN

Journal Article

Thermal/vacuum calibration of microwave humidity sounder on FY-3B satellite

Wang Zhenzhan,Zhang Shengwei,Li Jing,Li Yun,Wu Qiong

Journal Article

Multifunctional antimicrobial chlorhexidine polymers by remote plasma assisted vacuum deposition

Ana Mora-Boza, Francisco J. Aparicio, María Alcaire, Carmen López-Santos, Juan P. Espinós, Daniel Torres-Lagares, Ana Borrás, Angel Barranco

Journal Article

The design of pulse vacuum sterilizer based on fuzzy data fusion

Chen Shuangye

Journal Article

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