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Environmental and Dynamic Conditions for the Occurrence of Persistent Haze Events in North China

Yihui Ding,Ping Wu,Yanju Liu,Yafang Song

Engineering 2017, Volume 3, Issue 2,   Pages 266-271 doi: 10.1016/J.ENG.2017.01.009

Abstract: presents a concise summary of recent studies on the long-term variations of haze in North China and on the environmentaland dynamic conditions for severe persistent haze events.This atmospheric circulation and sinking motion provide favorable conditions for the formation and maintenance

Keywords： North China     Persistent haze events     Environmental conditions     Dynamic conditions    

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Acute toxicity assessment of drinking water source with luminescent bacteria: Impact of environmentalconditions and a case study in Luoma Lake, East China

Xuewen Yi, Zhanqi Gao, Lanhua Liu, Qian Zhu, Guanjiu Hu, Xiaohong Zhou

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1288-z

Abstract: . • Impacts of environmental factors on the toxicity testing was fully evaluated. • Dissolve oxygen hadThe suitable ranges of environmental factors, including pH value, organic matter, turbidity, hardness

Keywords： Bioluminescent bacteria     Acute toxicity     Pearson correlation analysis     Drinking water source     Vibrio fischeri    

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Changes of ecological conditions induced by rock tunneling in Laoshan Mountain area

LI Xiaozhao, ZHAO Xiaobao, WANG Zhongsheng

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 366-370 doi: 10.1007/s11709-008-0056-0

Abstract: Through field investigation, this paper examined the changes of ecological conditions induced by tunnelIt is found that the environmental factors and vegetation situation have been influenced by the tunnelingThe changed ecological conditions are beneficial for the settlement and growth of some herb and shrub

Keywords： supplement     fragmentation     reference     tunneling activity     vegetation situation    

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Assessing artificial neural network performance for predicting interlayer conditions and layer modulus

Lingyun YOU, Kezhen YAN, Nengyuan LIU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 487-500 doi: 10.1007/s11709-020-0609-4

Abstract: evaluate the performance of the artificial neural network (ANN) approach for predicting interlayer conditionsTo achieve this goal, two ANN based back-calculation models were proposed to predict the interlayer conditionsback-calculation model developed with ANN could be used to accurately predict layer modulus and interlayer conditions

Keywords： asphalt pavement     interlayer conditions     finite element method     artificial neural network     back-calculation    

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Influence of initial curing conditions and exposure environments on chloride migration in concrete using

Wen XUE, Weiliang JIN, Hiroshi YOKOTA,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 348-353 doi: 10.1007/s11709-010-0077-3

Abstract: To investigate the influence of initial curing conditions and exposure environments on chloride ions’ migration in concrete, the specimens that were cured in different conditions and placed in severalThe results indicated that the initial curing conditions and the wet-dry interval of external environments

Keywords： durability     effective diffusion coefficient     steady-state     migration test    

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Boundary conditions for axisymmetric piezoelectric cylinder

Baosheng ZHAO, Di WU, Xi CHEN

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 401-408 doi: 10.1007/s11465-013-0272-8

Abstract: A decay analysis technique developed by Gregory and Wan is converted into necessary conditions on theThe prescribed end-data of the circle cylinder must satisfy these conditions in order that they couldWhen stress and mixed conditions are imposed on the end of cylinder, these decaying state conditionsThey are then used for the correct formulation of boundary conditions for the theory solution (or theThe results of the present paper enable us to establish a set of correct boundary conditions, most of

Keywords： solid and structures     the axisymmetric deformation     the piezoelectric circular cylinder     the refined theory     Bessel’s Function    

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Influence of boundary conditions and turntable speeds on the stability of hydrostatic oil cavity

Zhaomiao LIU, Chengyin ZHANG, Feng SHEN

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 359-368 doi: 10.1007/s11465-011-0222-2

Abstract: numerically simulated, considering the rotation speeds of a turntable from 0 to 5 m/s and different boundary conditions

Keywords： hydrostatic oil cavity     flow state     oil cavity pressure     stability     vortex    

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Performance design of a cryogenic air separation unit for variable working conditions using the lumped

Jinghua XU, Tiantian WANG, Qianyong CHEN, Shuyou ZHANG, Jianrong TAN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1,   Pages 24-42 doi: 10.1007/s11465-019-0558-6

Abstract: semiconductor industries, are being developed with high operating elasticity under variable working conditionsand energy conservation laws, the piecewise-lumped parameters are extracted under variable working conditionsexchangers, and packing column of a 100000 Nm O /h large-scale ASU is enhanced to adapt to variable working conditions

Keywords： performance design     air separation unit (ASU)     lumped parameter model (LPM)     variable working conditions    

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Identification of structural parameters and boundary conditions using a minimum number of measurement

Ali KARIMPOUR, Salam RAHMATALLA

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1331-1348 doi: 10.1007/s11709-020-0686-4

Abstract: This article proposes a novel methodology that uses mathematical and numerical models of a structure to build a data set and determine crucial nodes that possess the highest sensitivity. Regression surfaces between the structural parameters and structural output features, represented by the natural frequencies of the structure and local transmissibility, are built using the numerical data set. A description of a possible experimental application is provided, where sensors are mounted at crucial nodes, and the natural frequencies and local transmissibility at each natural frequency are determined from the power spectral density and the power spectral density ratios of the sensor responses, respectively. An inverse iterative process is then applied to identify the structural parameters by matching the experimental features with the available parameters in the myriad numerical data set. Three examples are presented to demonstrate the feasibility and efficacy of the proposed methodology. The results reveal that the method was able to accurately identify the boundary coefficients and physical parameters of the Euler-Bernoulli beam as well as a highway bridge model with elastic foundations using only two measurement points. It is expected that the proposed method will have practical applications in the identification and analysis of restored structural systems with unknown parameters and boundary coefficients.

Keywords： structural model validation     eigenvalue problem     response surface     inverse problems    

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of preozonation on the bioactivity and biodiversity of subsequent biofilters under low temperature conditions—A

Jiaxuan YANG, Jun MA, Dan SONG, Xuedong ZHAI, Xiujuan KONG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0844-z

Abstract: The bioactivity was enhanced by preozonation under low temperature conditions.Temperature and nutrients are the dominant factors in external conditions to influence the biological

Keywords： Preozonation     BAC filtration     High ammonia level     Bacterial activity     Microbial community structure     Pilot scale study    

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Accelerate Formulating the Technology Strategy of Intelligent Manufacturing Suited to the National Conditions

Yan Jianlin, Dong Jingchen, Gu Yishana, Yang Xiaoying

Strategic Study of CAE 2018, Volume 20, Issue 4,   Pages 9-12 doi: 10.15302/J-SSCAE-2018.04.002

Abstract: development strategy for the intelligent manufacturing technology suitable for China’s national conditions

Keywords： China’s national conditions     intelligent manufacturing     technological strategy    

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Effects of operating conditions on membrane charge property and nanofiltration

Li XU, Li-Shun DU, Jing HE

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 492-499 doi: 10.1007/s11705-011-1143-7

Abstract: The permeate flux and the retention rate under different nanofiltration operating conditions were alsoThe effects of the operating conditions on the permeate flux and the retention rate were explained by

Keywords： nanofiltration membrane     streaming potential     Zeta potential     permeate flux     retention rate    

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An overview of the environmental finance policies in China: retrofitting an integrated mechanism forenvironmental management

LI Wei,HU Mengze

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 3,   Pages 316-328 doi: 10.1007/s11783-014-0625-5

Abstract: Considering the significant roles of the policies in developing environmental finance, an overview isconducted on the environmental finance policies (EFPs) in China.The policies have played a critical role in leading to a rapid development in environmental finance byinvolving more financial instruments to accomplish the objective-led environmental plans.To further strengthen the effectiveness of EFPs in facilitating environmental management, recommendations

Keywords： environmental finance policy     integrated mechanism     phased evolution     implementation progress     financialinstitution     environmental management    

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A New Sufficient Conditions and Hamiltonian graphs

Zhao Kewen

Strategic Study of CAE 2003, Volume 5, Issue 11,   Pages 61-64

Abstract:

Let G be a simple graph, δ and a be minimum degree and independence number of G, respectively, Faudree et al showed, in 1991, the Hamiltonian result with condition | N(x)∪ N(y) | ≥n-8. In 1993, Chen further considered the Hamiltonian with condition max |d{x) , d(y)| n/2 for each pair of non-adjacent vertices x , y with 1≤|N(x)∩NV(y)|≤a-l. In this paper a sufficient condition for a graph to be Hamiltonian graph is shown and the following result is obtained ： let G be a 2-connected graph of order n , if| N(x) U N(y) |≥ n-δ-1 for each pair of non-adjacent vertices x, y with 1≤ | N(x)∩ N(y) |α-1, then G is Hamiltonian or G∈{K(n-1)/2, (n + 1)/2, K2* V3K(n-2)/3}，This result generalizes some results in Hamiltonian graphs .

Keywords： Hamiltonian graph     neighborhood union conditions     minimum degree     independence number    

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Progress in use of surfactant in nearly static conditions in natural gas hydrate formation

Zhen PAN, Yi WU, Liyan SHANG, Li ZHOU, Zhien ZHANG

Frontiers in Energy 2020, Volume 14, Issue 3,   Pages 463-481 doi: 10.1007/s11708-020-0675-2

Abstract: Natural gas hydrate is an alternative energy source with a great potential for development. The addition of surfactants has been found to have practical implications on the acceleration of hydrate formation in the industrial sector. In this paper, the mechanisms of different surfactants that have been reported to promote hydrate formation are summarized. Besides, the factors influencing surfactant-promoted hydrate formation, including the type, concentration, and structure of the surfactant, are also described. Moreover, the effects of surfactants on the formation of hydrate in pure water, brine, porous media, and systems containing multiple surfactants are discussed. The synergistic or inhibitory effects of the combinations of these additives are also analyzed. Furthermore, the process of establishing kinetic and thermodynamic models to simulate the factors affecting the formation of hydrate in surfactant-containing solutions is illustrated and summarized.

Keywords： gas hydrate     kinetic hydrate promoter     compounding     model     surfactant     mechanism    

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Title Author Date Type Operation

Environmental and Dynamic Conditions for the Occurrence of Persistent Haze Events in North China

Yihui Ding,Ping Wu,Yanju Liu,Yafang Song

Journal Article

Acute toxicity assessment of drinking water source with luminescent bacteria: Impact of environmentalconditions and a case study in Luoma Lake, East China

Xuewen Yi, Zhanqi Gao, Lanhua Liu, Qian Zhu, Guanjiu Hu, Xiaohong Zhou

Journal Article

Changes of ecological conditions induced by rock tunneling in Laoshan Mountain area

LI Xiaozhao, ZHAO Xiaobao, WANG Zhongsheng

Journal Article

Assessing artificial neural network performance for predicting interlayer conditions and layer modulus

Lingyun YOU, Kezhen YAN, Nengyuan LIU

Journal Article

Influence of initial curing conditions and exposure environments on chloride migration in concrete using

Wen XUE, Weiliang JIN, Hiroshi YOKOTA,

Journal Article

Boundary conditions for axisymmetric piezoelectric cylinder

Baosheng ZHAO, Di WU, Xi CHEN

Journal Article

Influence of boundary conditions and turntable speeds on the stability of hydrostatic oil cavity

Zhaomiao LIU, Chengyin ZHANG, Feng SHEN

Journal Article

Performance design of a cryogenic air separation unit for variable working conditions using the lumped

Jinghua XU, Tiantian WANG, Qianyong CHEN, Shuyou ZHANG, Jianrong TAN

Journal Article

Identification of structural parameters and boundary conditions using a minimum number of measurement

Ali KARIMPOUR, Salam RAHMATALLA

Journal Article

of preozonation on the bioactivity and biodiversity of subsequent biofilters under low temperature conditions—A

Jiaxuan YANG, Jun MA, Dan SONG, Xuedong ZHAI, Xiujuan KONG

Journal Article

Accelerate Formulating the Technology Strategy of Intelligent Manufacturing Suited to the National Conditions

Yan Jianlin, Dong Jingchen, Gu Yishana, Yang Xiaoying

Journal Article

Effects of operating conditions on membrane charge property and nanofiltration

Li XU, Li-Shun DU, Jing HE

Journal Article

An overview of the environmental finance policies in China: retrofitting an integrated mechanism forenvironmental management

LI Wei,HU Mengze

Journal Article

A New Sufficient Conditions and Hamiltonian graphs

Zhao Kewen

Journal Article

Progress in use of surfactant in nearly static conditions in natural gas hydrate formation

Zhen PAN, Yi WU, Liyan SHANG, Li ZHOU, Zhien ZHANG

Journal Article