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Experimental study on the stratum applicability and mechanisms of bubble–slurry for earth pressure balance

Frontiers of Structural and Civil Engineering   Pages 1387-1399 doi: 10.1007/s11709-023-0005-y

Abstract: Soil conditioning is essential for addressing the stratum applicability problem of earth pressure balanceof bubble–slurry-conditioned sand was conducted to examine the conditioning effect, and the stratum applicabilitythat the conditioning effect of bubble–slurry in coarse gravel soil was excellent and could expand the applicability

Keywords： EPB shield     bubble–slurry     soil conditioning     stability     permeability    

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On the applicability of different adhesion models in adhesive particulate flows

Guanqing LIU, Shuiqing LI, Qiang YAO,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 280-286 doi: 10.1007/s11708-009-0062-5

Abstract: An adhesion map provides quantitative criteria for the appropriate selection of adhesion models applicable to a specific adhesive contact problem of fine particles in complex particulate flows. In this paper, three different general adhesion models are used to construct adhesion maps. The applicable regimes on the adhesion map for different approximate adhesion models are determined according to their underlying limitations. It is found that the choice of general model has limited influence on the structure of a constructed adhesion map. On the contrary, the regime of application for each approximate model is sensitive to the approximation level. A three-dimensional, more intuitive adhesion map based on physical parameters of particles is also built. Finally, recent applications of adhesion models in discrete element method (DEM) investigations of fine-particle flow dynamics are briefly discussed.

Keywords： adhesive contact     van der Waals force     adhesion model     adhesion map     DEM    

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Impact of household transitions on domestic energy consumption and its applicability to urban energy

Benachir MEDJDOUB, Moulay Larbi CHALAL

Frontiers of Engineering Management 2017, Volume 4, Issue 2,   Pages 171-183 doi: 10.15302/J-FEM-2017029

Abstract: The household sector consumes roughly 30% of Earth’s energy resources and emits approximately 17% of its carbon dioxide. As such, developing appropriate policies to reduce the CO emissions, which are associated with the world’s rapidly growing urban population, is a high priority. This, in turn, will enable the creation of cities that respect the natural environment and the well-being of future generations. However, most of the existing expertise focuses on enhancing the thermal quality of buildings through building physics while few studies address the social and behavioral aspects. In fact, focusing on these aspects should be more prominent, as they cause between 4% and 30% of variation in domestic energy consumption. Premised on that, the aim of this study was to investigate the effect in the context of the UK of household transitions on household energy consumption patterns. To achieve this, we applied statistical procedures (e.g., logistic regression) to official panel survey data comprising more than 5500 households in the UK tracked annually over the course of 18 years. This helped in predicting future transition patterns for different household types for the next 10 to 15 years. Furthermore, it enabled us to study the relationship between the predicted patterns and the household energy usage for both gas and electricity. The findings indicate that the life cycle transitions of a household significantly influence its domestic energy usage. However, this effect is mostly positive in direction and weak in magnitude. Finally, we present our developed urban energy model “EvoEnergy” to demonstrate the importance of incorporating such a concept in energy forecasting for effective sustainable energy decision-making.

Keywords： urban energy planning     household transitions     smart cities     energy forecasting     household projection     serious gaming    

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Techniques for sediment pollution control and discussion on the applicability in lakes of China

Hu Xiaozhen,Jin Xiangcan,Lu Shaoyong and Chu Zhaosheng

Strategic Study of CAE 2009, Volume 11, Issue 9,   Pages 28-33

Abstract:

This article intends to give a systematic review of three sediment pollution control techniques, that is environmental dredging technology, in-situ capping technology, and in-situ inactivation technology, which have been applied successfully in many cases home and abroad. Through a detailed summary, the three techniques have been clearly displayed about the characteristics, main technical processes, primary environment problems during construction and application status, etc. On comparision of advantages and disadvantages of the three techniques, environmental dredging technology is recommended to apply to economy relatively advanced area with heavily sediment polluted lake bay or river mouth. In-situ capping technology is applicable for moderate-deep lakes and rivers, while in-situ inactivation technology is applicable for non-drinking function lakes with weak wave disturbance. The application foreground of the three techniques in sediment pollution control in Chinese lakes is also prospected.

Keywords： lake     sediment     pollution control technique     applicability    

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Simplified analytical solution for free vibration characteristics of Hardfill dam

XIAO Wei, HE Yunlong, ZHANG Yanfeng

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3,   Pages 219-225 doi: 10.1007/s11709-008-0037-3

Abstract: Then the applicability and accuracy of shear wedge method to analyze free vibration characteristics of

Keywords： upstream concrete     hydrodynamic pressure     vibration     one-dimensional     applicability    

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Applicability of the Arrhenius model for Ammonia Oxidizing Bacteria subjected to temperature time gradients

Alberto MANNUCCI,Giulio MUNZ,Gualtiero MORI,Claudio LUBELLO,Jan A. OLESZKIEWICZ

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 6,   Pages 988-994 doi: 10.1007/s11783-014-0751-0

Abstract: The aim of this work is to identify the range of applicability of Arrhenius type temperature dependenceThe dependence of growth kinetics on temperature time gradients and the range of applicability of Arrhenius

Keywords： nitrification rate     temperature effect     continuous titrimetric tests     time-gradient temperature variations     Ammonia Oxidizing Bacteria (AOB)    

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Applicability of high dimensional model representation correlations for ignition delay times of n-heptane

Wang LIU, Jiabo ZHANG, Zhen HUANG, Dong HAN

Frontiers in Energy 2019, Volume 13, Issue 2,   Pages 367-376 doi: 10.1007/s11708-018-0584-9

Abstract: It is difficult to predict the ignition delay times for fuels with the two-stage ignition tendency because of the existence of the nonlinear negative temperature coefficient (NTC) phenomenon at low temperature regimes. In this paper, the random sampling-high dimensional model representation (RS-HDMR) methods were employed to predict the ignition delay times of n-heptane/air mixtures, which exhibits the NTC phenomenon, over a range of initial conditions. A detailed n-heptane chemical mechanism was used to calculate the fuel ignition delay times in the adiabatic constant-pressure system, and two HDMR correlations, the global correlation and the stepwise correlations, were then constructed. Besides, the ignition delay times predicted by both types of correlations were validated against those calculated using the detailed chemical mechanism. The results showed that both correlations had a satisfactory prediction accuracy in general for the ignition delay times of the n-heptane/air mixtures and the stepwise correlations exhibited a better performance than the global correlation in each subdomain. Therefore, it is concluded that HDMR correlations are capable of predicting the ignition delay times for fuels with two-stage ignition behaviors at low-to-intermediate temperature conditions.

Keywords： ignition delay     random sampling     high dimensional model representation     n-heptane     fuel kinetics    

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Study on treatment technology for heavily polluted river in Shenyang—Fushun Section of Hunhe River basin

Peng Jianfeng,Song Yonghui,Gao Hongjie,Ren Zhaoyong,Li Rui,Yu Huibin

Strategic Study of CAE 2013, Volume 15, Issue 3,   Pages 103-106

Abstract: The result shows that the selected process displays a good treatment capability and applicability for

Keywords： heavily polluted river     Shenyang—Fushun Section     tidal-flow wetland     applicability    

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Robust Metal–Organic Frameworks with High Industrial Applicability in Efficient Recovery C Article

Shikai Xian, Junjie Peng, Haardik Pandey, Timo Thonhauser, Hao Wang, Jing Li

Engineering 2023, Volume 23, Issue 4,   Pages 56-63 doi: 10.1016/j.eng.2022.07.017

Abstract:

Developing efficient adsorbents with high uptake and selectivity for separation and recovery of C2H6 and C3H8 from natural gas is an important but challenging task. In this work, we demonstrate that high surface polarity and suitable pore diameter are two key factors that can synergistically enhance the separation performance, exemplified by metal–organic framework (MOF)-303 and Matériaux de l'Institut Lavoisier (MIL)-160, both possessing one-dimensional (1D) open channels with high density of heteroatoms and desired pore size (5–7 Å). Significantly, the uptake of MOF-303 for C3H8 is up to 3.38 mmol∙g−1 at 298 K and 5 kPa with a record-high C3H8/CH4 (5:85, v/v) ideal adsorbed solution theory (IAST) selectivity of 5114 among all reported MOFs. In addition, MOF-303 also displays high C2H6 uptake capacity (at 10 kPa) and C2H6/CH4 (10:85, v/v) selectivity, reaching 1.59 mmol∙g−1 and 26, respectively. Owing to the larger pore diameter and lower density of heteroatoms within its 1D channels, MIL-160 shows apparently lower uptake and selectivity compared to those of MOF-303, though the values exceed those of majority of reported MOFs. Density functional theory (DFT) calculations verify that the high surface polarity and the suitable pore diameter synergistically enhance the affinity of the frameworks toward C3H8 and C2H6, giving rise to the high loading capacity and selectivity for C3H8 and C2H6. Both MOFs feature remarkable moisture stability without structural change upon exposure to 95% relative humidity (RH) for a month. In addition, synthesis of both compounds can be readily scaled up through one-pot reactions to afford about 5 g samples with high crystallinity. Finally, the substantial potential of MOF-303 and MIL-160 as advanced adsorbents for efficient separation of C3H8/C2H6/CH4 has been demonstrated by ternary breakthrough experiments, regeneration tests, and cyclic evaluation. The excellent separation performance, high stability, low cost, and good scalability endow both MOFs promising adsorbents for natural gas purification and recovery of C2H6 and C3H8.

Keywords： Metal–     organic framework     Hydrocarbon adsorption and separation     Selectivity     Stability     Scale-up synthesis    

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Title Author Date Type Operation

Experimental study on the stratum applicability and mechanisms of bubble–slurry for earth pressure balance

Journal Article

On the applicability of different adhesion models in adhesive particulate flows

Guanqing LIU, Shuiqing LI, Qiang YAO,

Journal Article

Impact of household transitions on domestic energy consumption and its applicability to urban energy

Benachir MEDJDOUB, Moulay Larbi CHALAL

Journal Article

Techniques for sediment pollution control and discussion on the applicability in lakes of China

Hu Xiaozhen,Jin Xiangcan,Lu Shaoyong and Chu Zhaosheng

Journal Article

Simplified analytical solution for free vibration characteristics of Hardfill dam

XIAO Wei, HE Yunlong, ZHANG Yanfeng

Journal Article

Applicability of the Arrhenius model for Ammonia Oxidizing Bacteria subjected to temperature time gradients

Alberto MANNUCCI,Giulio MUNZ,Gualtiero MORI,Claudio LUBELLO,Jan A. OLESZKIEWICZ

Journal Article

Applicability of high dimensional model representation correlations for ignition delay times of n-heptane

Wang LIU, Jiabo ZHANG, Zhen HUANG, Dong HAN

Journal Article

Study on treatment technology for heavily polluted river in Shenyang—Fushun Section of Hunhe River basin

Peng Jianfeng,Song Yonghui,Gao Hongjie,Ren Zhaoyong,Li Rui,Yu Huibin

Journal Article

Robust Metal–Organic Frameworks with High Industrial Applicability in Efficient Recovery C

Shikai Xian, Junjie Peng, Haardik Pandey, Timo Thonhauser, Hao Wang, Jing Li

Journal Article