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Fracture model for the prediction of the electrical percolation threshold in CNTs/Polymer composites

Yang SHEN, Pengfei HE, Xiaoying ZHUANG

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1, Pages 125-136 doi: 10.1007/s11709-017-0396-8

Abstract: In this paper, we propose a 3D stochastic model to predict the percolation threshold and the effective electric conductivity of CNTs/Polymer composites. We consider the tunneling effect in our model so that the unrealistic interpenetration can be avoided in the identification of the conductive paths between the CNTs inside the polymer. The results are shown to be in good agreement with reported experimental data.

Keywords： electrical percolation CNTs/Polymer composites fracture model electric conductivity tunnelling effects

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Study on construction mechanical behavior of silt filled karst cave tunne

Miao Dehai ,Mo Yangchun,Wang Wei,Chen Tao

Strategic Study of CAE 2009, Volume 11, Issue 12, Pages 41-46

Abstract:

When tunnel is constructed in karst cave zone, all kinds of filled caverns will be inevitably meet.The construction method and tunnel structure's stability becomes the key problem for the design and construction. The range of DK255+925~+976, filled with crushed rock and silt, forⅠline of Maluqing tunnel on Yichang-Wanzhou Railway is taken as an example. The mechanical responses of excavation and support are studied by using the three-dimensional fast Lagrangian analysis of continua method. The numerical simulation reveals the distribution characteristics of displacement for surrounding rock and displacement and interial stress for the shotcrete and the maximum axis force for locking anchor pipe under the condition of dynamic step excavation and support. The obtained conclusions offer a guideline for the design and construction of tunnels in similar underground projects.

Keywords： tunnelling engineering silt filled Karst cave mechanical behavior numerical simulation

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Temporal variation of PM-associated health effects in Shijiazhuang, Hebei

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1376-0

Abstract:

•Annual mean PM_2.5 in Shijiazhuang were 87, 95, and 82 µg/m³ in 2015–2017.

Keywords： PM_2.5 Health effects Integrated exposure-response model Shijiazhuang

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The construct technology of tunnel and underground engineering in China

Wang Mengshu,Tan Zhongsheng

Strategic Study of CAE 2010, Volume 12, Issue 12, Pages 4-10

Abstract:

This paper mainly introduced the design theory and method of Chinese tunnel and underground engineering, construction technique of drill blast method, the shield tunnel construction technique and TBM(tunnel boring machine) construction technique and so on,and pointed out the research direction of Chinese tunnel and underground engineering from now on, including: the long tunnel's construction technology of great burying depth, the urban underground space plan, dynamic design of the tunnel and underground engineering as well as methods to reduce the building cost of projects and so on.

Keywords： tunnel underground engineering design theory drill-blast technique shield tunnelling and TBM

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Synergistic effects of sodium hypochlorite disinfection and iron-oxidizing bacteria on early corrosion

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-021-1506-3

Abstract:

• The early corrosion process in the cast iron pipes was investigated.

Keywords： corrosion Drinking water distribution systems Chlorine disinfection Iron-oxidizing bacteria Coupling effects

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Investigation of effects of Cocamide Diethanolamide chemical on physical and rheological properties of

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 1, Pages 99-116 doi: 10.1007/s11709-021-0799-4

Abstract: The effects of different modification parameters and chemical additive on modified samples were investigated

Keywords： Cocamide Diethanolamide bitumen modification rheology Superpave tests

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Protective effects of lignin fractions obtained from grape seeds against bisphenol AF neurotoxicity viaantioxidative effects mediated by the Nrf2 pathway

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 7, Pages 976-989 doi: 10.1007/s11705-022-2237-0

Abstract: The antioxidative and neuroprotective effects of the lignin fractions were evaluated with the apoptosisBPAF exposure had negative effects on the reactive oxygen species, malondialdehyde content, and superoxideAn immunofluorescence assay demonstrated that grape seed lignin induced protective effects on BPAF-injured

Keywords： grape seed lignin structure antioxidant NE-4C cells neuroprotection

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Quorum sensing regulation methods and their effects on biofilm in biological waste treatment systems:

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 7, doi: 10.1007/s11783-021-1495-2

Abstract:

• Quorum sensing enhancement and inhibition methods are summarized.

Keywords： Quorum sensing Biological waste treatment Biofilm formation

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Seismic effects on reinforcement load and lateral deformation of geosynthetic-reinforced soil walls

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 1001-1015 doi: 10.1007/s11709-021-0734-8

Abstract: Current design methods for the internal stability of geosynthetic-reinforced soil (GRS) walls postulate seismic forces as inertial forces, leading to pseudo-static analyses based on active earth pressure theory, which yields unconservative reinforcement loads required for seismic stability. Most seismic analyses are limited to the determination of maximum reinforcement strength. This study aimed to calculate the distribution of the reinforcement load and connection strength required for each layer of the seismic GRS wall. Using the top-down procedure involves all of the possible failure surfaces for the seismic analyses of the GRS wall and then obtains the reinforcement load distribution for the limit state. The distributions are used to determine the required connection strength and to approximately assess the facing lateral deformation. For sufficient pullout resistance to be provided by each reinforcement, the maximum required tensile resistance is identical to the results based on the Mononobe–Okabe method. However, short reinforcement results in greater tensile resistances in the mid and lower layers as evinced by compound failure frequently occurring in GRS walls during an earthquake. Parametric studies involving backfill friction angle, reinforcement length, vertical seismic acceleration, and secondary reinforcement are conducted to investigate seismic impacts on the stability and lateral deformation of GRS walls.

Keywords： geosynthetics reinforced soil retaining walls seismic performance

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Effects of manufactured nanomaterials on algae: Implications and applications

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1554-3

Abstract:

● Summary of positive and negative effects of MNMs on algae.

Keywords： Manufactured nanomaterials Algae Mechanisms Effects Implications Applications

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Modeling radiative effects of haze on summer-time convective precipitation over North China: a case study

Xuying WANG, Bin ZHANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0840-3

Abstract: We modeled the impact of haze radiative effects on precipitation in North China.Shortwave heating induced by haze radiative effects would reduce heavy rainfalls.version 3.3) through model sensitivity studies between scenarios with and without aerosol radiative effectsWe found that the shortwave heating induced by aerosol radiative effects would significantly reduce heavy

Keywords： Haze Aerosol radiative effects Convective precipitation

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Interactive effects of high-speed rail on nodal zones in a city: exploratory study on China

Guo LIU, Kunhui YE

Frontiers of Engineering Management 2019, Volume 6, Issue 3, Pages 327-335 doi: 10.1007/s42524-019-0051-2

Abstract: Results indicate that the effects of HSR operation on HNZ are multidimensional, transportation vitalityhas an intermediary role in the effects, and the effects on the physical environment are negative.

Keywords： high-speed rail nodal zone interactive effects sustainable urbanization China

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Higher-order mode effects on the seismic performance of tall piers

Zhongguo GUAN, Jianzhong LI, Yan XU, Hao LU

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 4, Pages 496-502 doi: 10.1007/s11709-011-0131-9

Abstract: A comprehensive analysis was conducted to investigate the seismic performance of a typical tall bridge pier through incremental dynamical analysis (IDA). The effect of higher-order modes was studied specifically. The results showed that higher-order modes significantly contributed to the structural seismic response and should not be neglected. Including these modes resulted in an additional hinge midway up the pier. No plastic hinge would occur at this location for conventional bridge piers. Higher-order modes also led to an out-of-phase response between the hinge rotation at the pier bottom and the displacement at the top. This means that the displacement-based seismic design method cannot correctly predict the mechanical state of the critical hinge and therefore is not suitable for use in the seismic design of tall piers. Mistakenly using the displacement-based seismic design method for tall piers may result in a seriously unsafe condition.

Keywords： tall bridges higher-order mode effects incremental dynamic analysis

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Toxic effects of enrofloxacin on

Hongwei QIN, Liufang CHEN, Nan LU, Yahui ZHAO, Xing YUAN

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1, Pages 107-116 doi: 10.1007/s11783-011-0327-1

Abstract: In this article, the toxic effects of Enrofloxacin (ENFX) on were studied, through investigating the

Keywords： enrofloxacin Scenedesmus obliquus toxic effects

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Beneficial effects of preventive cholecystectomy in patients with hepatic cancer

LIU Anzhong, LI Jun, HUA Huwei

Frontiers of Medicine 2008, Volume 2, Issue 2, Pages 139-142 doi: 10.1007/s11684-008-0026-x

Abstract: There is no conclusive answer to the question whether excising gall bladder is helpful to the patient with hepatic cancer. The survival rate of patients with hepatic cancer for more than two years has been increased, and the incidence of complications of cholecystitis and gall stone are relatively higher among these patients, which may seriously complicate treatment of advanced hepatic cancer and decrease quality of life. The researchers conducted a prospective clinical investigation from 2002 to 2006 to assess the clinical significance of preventive cholecystectomy in patients with hepatic cancer. One hundred and eighteen cases of postoperative patients with hepatic cancer, who survived for more than two years, were followed up. Based on whether cholecystectomy was performed, the patients were divided into two groups including 48 cases with cholecystectomy and 70 cases with cholecyst reserved. The two-year morbidity of gall stone and morbidity of pain in the right upper abdomen of cholecyst reservation group were 54.29% and 68.57%, respectively, obviously higher than 0.00% and 20.83% of cholecystectomy group. Mainly for those treated with transcatheter arterial chemo-embolization, the morbidity of gall stone was 86.67% ( < 0.01). Therefore, preventive cholecystectomy is strongly recommended during hepatectomy to decrease the incidence of chronic cholecystitis and gall stone, especially for those whose chemotherapy and embolization will be carried out through hepatic artery and portal vein.

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Title Author Date Type Operation

Fracture model for the prediction of the electrical percolation threshold in CNTs/Polymer composites

Yang SHEN, Pengfei HE, Xiaoying ZHUANG

Journal Article

Study on construction mechanical behavior of silt filled karst cave tunne

Miao Dehai ,Mo Yangchun,Wang Wei,Chen Tao

Journal Article

Temporal variation of PM-associated health effects in Shijiazhuang, Hebei

Journal Article

The construct technology of tunnel and underground engineering in China

Wang Mengshu,Tan Zhongsheng

Journal Article

Synergistic effects of sodium hypochlorite disinfection and iron-oxidizing bacteria on early corrosion

Journal Article

Investigation of effects of Cocamide Diethanolamide chemical on physical and rheological properties of

Journal Article

Protective effects of lignin fractions obtained from grape seeds against bisphenol AF neurotoxicity viaantioxidative effects mediated by the Nrf2 pathway

Journal Article

Quorum sensing regulation methods and their effects on biofilm in biological waste treatment systems:

Journal Article

Seismic effects on reinforcement load and lateral deformation of geosynthetic-reinforced soil walls

Journal Article

Effects of manufactured nanomaterials on algae: Implications and applications

Journal Article

Modeling radiative effects of haze on summer-time convective precipitation over North China: a case study

Xuying WANG, Bin ZHANG

Journal Article

Interactive effects of high-speed rail on nodal zones in a city: exploratory study on China

Guo LIU, Kunhui YE