Resource Type

Journal Article 464

Conference Videos 2

Conference Information 1

Year

2024 1

2023 12

2022 24

2021 47

2020 40

2019 53

2018 33

2017 34

2016 36

2015 34

2014 19

2013 21

2012 19

2011 18

2010 17

2009 15

2008 9

2007 10

2006 2

2005 5

open ︾

Keywords

Artificial intelligence 4

Additive manufacturing 3

Puccinia striiformis f. sp. tritici 2

AGM 2

Bayesian optimization 2

C/N ratio 2

CO2 capture 2

CO2 emissions 2

COVID-19 2

Denitrification 2

Optimization 2

Salinity 2

Wastewater 2

adsorption 2

construction 2

different 2

finite element 2

global optimization 2

nitrous oxide 2

open ︾

Search scope:

排序： Display mode:

Impact of food to microorganism ratio and alcohol ethoxylate dosage on methane production in treatment

Yulun Nie, Xike Tian, Zhaoxin Zhou, Yu-You Li

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 6, doi: 10.1007/s11783-017-0947-1

Abstract: The effects of food to microorganism (F/M) ratio and alcohol ethoxylate (AE) dosage on the methane productionM ratio of 0.088–0.357.M ratio (F/M<0.158).M ratio of 1.054.Higher AE amount and F/M ratio may destroy the cell structure of microbe, which lead to the decrease

Keywords： Anaerobic membrane bioreactor AnMBR     F/M ratio     Surfactant     Wastewater     Methane production     Influence    

HTML PDF Collect

Nonlinear dynamics of a wind turbine tower

IANNUZZO, F. PENTA, M. MONACO

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 342-350 doi: 10.1007/s11465-019-0524-3

Abstract: The recent proliferation of wind turbines has revealed problems in their vulnerability under different site conditions, as evidenced by recent collapses of wind towers after severe actions. Analyses of structures subjected to variable actions can be conducted through several methods with different accuracy levels. Nonlinear dynamics is the most reliable among such methods. This study develops a numerical procedure to obtain approximate solutions for rigid-plastic responses of structures subjected to base harmonic pulses. The procedure’s model is applied to a wind turbine tower subjected to inertial forces generated by harmonic ground acceleration, and failure is assumed to depend on the formation of shear hinges. The proposed approach provides an efficient representation of the post-elastic behavior of the structure, has a low computational cost and high effectiveness, and uses a limited number of mechanical parameters.

Keywords： nonlinear dynamics     plastic shear failure     modal approximation     time history    

HTML PDF Collect

Investigation of wind energy potentials in Brunei Darussalam

M. A. SALAM, M. G. YAZDANI, Q. M. RAHMAN, Dk NURUL, S. F. MEI, Syeed HASAN

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 731-741 doi: 10.1007/s11708-018-0528-4

Abstract: Based on this analysis, it has been found that the wind speed of 3 to 5 m/s has a probability of occurrenceBesides, the annual energy production at a wind speed of 5 m/s has been found to be in the range between

Keywords： wind speed     Weibull distribution     wind rose     wind energy     wind power    

HTML PDF Collect

Best operating conditions to produce hydroxyapatite nanoparticles by means of a spinning disc reactor

F. D’ Intino,B. de Caprariis,M.L. Santarelli,N. Verdone,A. Chianese

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 156-160 doi: 10.1007/s11705-014-1427-9

Abstract: In this work, Mg doped hydroxyapatite (Mg-HAP) nanoparticles were produced by a reaction-precipitation process by using a spinning disc reactor (SDR) at high rotational speed. The production process of these nanoparticles consisted of the neutralization reaction between two aqueous solutions of calcium chloride and ammonia orthophosphate at room temperature. By operating at pH= 10, a high purity Mg-HAP nanoparticles were obtained. In particular, they were 51 nm in average size when the two reagents were fed over the disc symmetrically at 3 cm from the disc center and a rotational speed of the disc reactor equal to 1400 r/min was adopted.

Keywords： hydroxyapatite     nanoparticles     spinning disc reactor    

HTML PDF Collect

Level-direction decomposition analysis with a focus on image watermarking framework Article

M. F. KAZEMI,M. A. POURMINA,A. H. MAZINAN

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 11,   Pages 1199-1217 doi: 10.1631/FITEE.1500165

Abstract: The approach performance is evaluated through several indices including the peak signal-to-noise ratio

Keywords： Level-direction decomposition analysis     Watermarking framework     Contourlet embedding representation     Scrambling module     Simulated attacks    

HTML PDF Collect

An investigation of reaction furnace temperatures and sulfur recovery

ASADI, M. PAKIZEH, M. POURAFSHARI CHENAR

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 362-371 doi: 10.1007/s11705-011-1106-z

Abstract: The effect of the H S concentration, the H S/CO ratio, the input air flow rate, the acid gas flow ofAlso the effects of the tail gas ratio and the catalytic bed type on the sulfur recovery were studiedHowever, if three other parameters (the concentration of H S, the ratio H S/CO and the flow rate ofThe optimal catalytic bed temperature, tail gas ratio and type of catalytic bed were also determinedand these conditions are a minimum temperature of 300°C, a ratio of 2.0 and a hydrolysing Claus bed.

Keywords： Claus unit     concentration of H2S     tail gas ratio     sulfur recovery     catalytic bed    

HTML PDF Collect

Integrating space and time: a case for phenological context in grazing studies and management

Dawn M. BROWNING, Sheri SPIEGAL, Richard E. ESTELL, Andres F. CIBILS, Raul H. PEINETTI

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 1,   Pages 44-56 doi: 10.15302/J-FASE-2017193

Abstract: In water-limited landscapes, patterns in primary production are highly variable across space and time. Livestock grazing is a common agricultural practice worldwide and a concern is localized overuse of specific pasture resources that can exacerbate grass losses and soil erosion. On a research ranch in New Mexico with average annual rainfall of 217 mm, we demonstrate with a quantitative approach that annual seasons vary greatly and examine foraging patterns in Angus-Hereford ( ) cows. We define five seasonal stages based on MODIS NDVI: pre-greenup, greenup, peak green, drydown and dormant, and examine livestock movements in 2008. Daily distance traveled by cows was greater and foraging area expanded during periods with higher precipitation. A regression model including minimum NDVI, rainfall and their interaction explained 81% of the seasonal variation in distance traveled by cows ( <0.01). Cows explored about 81 ha·d while foraging, but tended to explore smaller areas as the pasture became greener (greenup and peak green stages). Cows foraged an average of 9.7 h daily and spent more time foraging with more concentrated search patterns as pastures became greener. Our findings suggest that phenological context can expand the capacity to compare and integrate findings, and facilitate meta-analyses of grazing studies conducted at different locations and times of year.

Keywords： GPS collars     Jornada Experimental Range     land-surface phenology     livestock movement     LTAR     MODIS NDVI     rangeland    

HTML PDF Collect

Increasing the performance of anaerobic digestion: Pilot scale experimental study for thermal hydrolysis of mixed sludge

PEREZ-ELVIRA, M. FDZ-POLANCO, F. FDZ-POLANCO,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2,   Pages 135-141 doi: 10.1007/s11783-010-0024-5

Abstract: The performance of a pilot plant operation combining thermal hydrolysis (170°C, 30 min) and anaerobic digestion (AD) was studied, determining the main properties for samples of fresh mixed sludge, hydrolyzed sludge, and digested sludge, in order to quantify the thermal pretreatment performance (disintegration, solubilisation, and dewaterability) and its impact on the anaerobic digestion performance (biodegradability, volatile solids reduction, and digester rheology) and end product characteristics (dewaterability, sanitation, organic and nitrogen content). The disintegration achieved during the thermal treatment enhances the sludge centrifugation, allowing a 70% higher total solids concentration in the feed to anaerobic digestion. The digestion of this sludge generates 40% more biogas in half the time, due to the higher solids removal compared to a conventional digester. The waste generated can be dewatered by centrifugation to 7% dry solids without polymer addition, and is pathogen free.

Keywords： anaerobic digestion (AD)     biogas     performance     sludge     thermal hydrolysis    

HTML PDF Collect

Common biases in client involved decision-making in the AEC industry

Sujesh F. SUJAN, Arto KIVINIEMI, Steve W. JONES, Jacqueline M. WHEATHCROFT, Eilif HJELSETH

Frontiers of Engineering Management 2019, Volume 6, Issue 2,   Pages 221-238 doi: 10.1007/s42524-019-0026-3

Abstract: Understanding of the constitution of client involved decisions is important for future improvements of the processes. Significant decisions in construction projects are reliant on heuristic processes where assumptions are developed from past experience. The paper presents a methodology to collect empirical data in an unstructured manner utilizing participant intuition and experience regarding project level collaboration, a term easily understood by practitioners. Empirical data collected from 6 focus group discussions in Norway and 18 individual interviews in Finland is associated with biases in decision making aimed at bridging the gap of understanding and literature’s insufficient coverage. An analytic framework was developed to suit the diverse emergence of concepts to allow application of psychological principles in a structured manner to empirical data. The paper contributes by identifying types of cognitive and motivational biases in client involved decisions. The biases are found to be alleviated by one another depending on the particular application of the decision. Findings suggest that normative beliefs exist developed from past experience and habitual thinking. A number of emerged biases in this domain are alleviated from normative beliefs which are discussed in this paper.

Keywords： collaboration     construction industry     social science     decision-making     client     cognitive bias     motivational bias     holistic analysis     human factor    

HTML PDF Collect

Bamboo-like -doped carbon nanotubes encapsulating M(Co, Fe)-Ni alloy for electrochemical production of

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 4,   Pages 498-510 doi: 10.1007/s11705-021-2082-6

Abstract: Low-cost electrocatalysts to produce tunable syngas with a potential-independent CO/H2 ratioHerein, a series of N-doped carbon nanotubes encapsulating binary alloy nanoparticles (MxNi-NCNT, M= Fe, Co) were successfully fabricated through the co-pyrolysis of melamine andMore importantly, stable CO/H2 ratios of 2:1 and 1.5:1, corresponding to the ratio to producepotential-independent electrocatalysts to effectively produce syngas with an adjustable CO/H2 ratio

Keywords：     syngas     N-doped carbon nanotubes     encapsulated alloy nanoparticles     CO/H2 ratio    

HTML PDF Collect

Recent Advances in 19Fluorine Magnetic Resonance Imaging with Perfluorocarbon Emulsions Review

Wickline,Gregory M. Lanza

Engineering 2015, Volume 1, Issue 4,   Pages 475-489 doi: 10.15302/J-ENG-2015103

Abstract:

The research roots of 19fluorine (19F) magnetic resonance imaging (MRI) dateFor many years during this timeframe, 19F imaging research continued at a slow pace as thelast decade and particularly the last several years, the pace and clinical relevance of 19FIn part, this is due to advances in MRI instrumentation, 19F/1H coil designs, andphysiology, and combined with a cadre of innovative agents, have brought the concept of 19F

Keywords： fluorine     magnetic resonance imaging (MRI)     dual-tuned coil     perfluorocarbon     angiogenesis     cell labeling    

HTML PDF Collect

Hydraulic Pressure Extremes Ratio & Extremes Ratio Efficiencies

Qi Maolin

Strategic Study of CAE 2001, Volume 3, Issue 4,   Pages 73-75

Abstract: applies basic formula to the calculation of a relationship between the hydraulic pressure extremes ratioof hydraulic system and the extremes ratio efficiencies.This relationship shows that the greater the hydraulic pressure extremes ratio is, the lower the extremesratio efficiencies are.The article holds that the hydraulic pressure extremes ratio can be designed and chosen.

Keywords： hydraulic pressure extremes ratio     extremes ratio efficiencies     hydraulic system    

HTML PDF Collect

Pressure drop analysis on the positive half-cell of a cerium redox flow battery using computational fluid dynamics: Mathematical and modelling aspects of porous media

Fernando F. Rivera, Berenice Miranda-Alcántara, Germán Orozco, Carlos Ponce de León, Luis F. Arenas

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 399-409 doi: 10.1007/s11705-020-1934-9

Abstract: Description of electrolyte fluid dynamics in the electrode compartments by mathematical models can be a powerful tool in the development of redox flow batteries (RFBs) and other electrochemical reactors. In order to determine their predictive capability, turbulent Reynolds-averaged Navier-Stokes (RANS) and free flow plus porous media (Brinkman) models were applied to compute local fluid velocities taking place in a rectangular channel electrochemical flow cell used as the positive half-cell of a cerium-based RFB for laboratory studies. Two different platinized titanium electrodes were considered, a plate plus a turbulence promoter and an expanded metal mesh. Calculated pressure drop was validated against experimental data obtained with typical cerium electrolytes. It was found that the pressure drop values were better described by the RANS approach, whereas the validity of Brinkman equations was strongly dependent on porosity and permeability values of the porous media.

Keywords： CFD simulation     porous media     porous electrode     pressure drop     redox flow battery    

HTML PDF Collect

Development of soft kernel durum wheat

Craig F. MORRIS

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 3,   Pages 273-278 doi: 10.15302/J-FASE-2019259

Abstract:

Kernel texture (grain hardness) is a fundamental and determining factor related to wheat ( spp.) milling, baking and flour utilization. There are three kernel texture classes in wheat: soft and hard hexaploid ( ), and very hard durum ( subsp. ). The genetic basis for these three classes lies with the Puroindoline genes. Phenotypically, the easiest means of quantifying kernel texture is with the Single Kernel Characterization System (SKCS), although other means are valid and can provide fundamental material properties. Typical SKCS values for soft wheat would be around 25 and for durum wheat≥80. Soft kernel durum wheat was created via homeologous recombination using the mutation, which facilitated the transfer of ca. 28 Mbp of 5DS that replaced ca. 21 Mbp of 5BS. The 5DS translocation contained a complete and intact locus and both puroindoline genes. Expression of the puroindoline genes in durum grain resulted in kernel texture and flour milling characteristics nearly identical to that of soft wheat, with high yields of break and straight-grade flours, which had small particle size and low starch damage. Dough water absorption was markedly reduced compared to durum flour and semolina. Dough was essentially unchanged and reflected the inherent gluten properties of the durum background. Pasta quality was essentially equal-to-or-better than pasta made from semolina. Agronomically, soft durum germplasm showed good potential with moderate grain yield and resistance to a number of fungal pathogens and insects. Future breeding efforts will no doubt further improve the quality and competitiveness of soft durum cultivars.

Keywords： soft durum wheat     grain hardness     puroindolines     milling     baking     pasta     noodles    

HTML PDF Collect

Controlling interstory drift ratio profiles via topology optimization strategies

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2,   Pages 165-178 doi: 10.1007/s11709-022-0892-3

Abstract: proposed approach involves solving a min–max optimization problem to suppress the maximum interstory drift ratioThe proposed methodology can shape the interstory drift ratio profiles into inverted triangular or quadratic

Keywords： interstory drift ratio     aggregation function     bound formulation     min–max problem     topology optimization    

HTML PDF Collect

Title Author Date Type Operation

Impact of food to microorganism ratio and alcohol ethoxylate dosage on methane production in treatment

Yulun Nie, Xike Tian, Zhaoxin Zhou, Yu-You Li

Journal Article

Nonlinear dynamics of a wind turbine tower

IANNUZZO, F. PENTA, M. MONACO

Journal Article

Investigation of wind energy potentials in Brunei Darussalam

M. A. SALAM, M. G. YAZDANI, Q. M. RAHMAN, Dk NURUL, S. F. MEI, Syeed HASAN

Journal Article

Best operating conditions to produce hydroxyapatite nanoparticles by means of a spinning disc reactor

F. D’ Intino,B. de Caprariis,M.L. Santarelli,N. Verdone,A. Chianese

Journal Article

Level-direction decomposition analysis with a focus on image watermarking framework

M. F. KAZEMI,M. A. POURMINA,A. H. MAZINAN

Journal Article

An investigation of reaction furnace temperatures and sulfur recovery

ASADI, M. PAKIZEH, M. POURAFSHARI CHENAR

Journal Article

Integrating space and time: a case for phenological context in grazing studies and management

Dawn M. BROWNING, Sheri SPIEGAL, Richard E. ESTELL, Andres F. CIBILS, Raul H. PEINETTI

Journal Article

Increasing the performance of anaerobic digestion: Pilot scale experimental study for thermal hydrolysis of mixed sludge

PEREZ-ELVIRA, M. FDZ-POLANCO, F. FDZ-POLANCO,

Journal Article

Common biases in client involved decision-making in the AEC industry

Sujesh F. SUJAN, Arto KIVINIEMI, Steve W. JONES, Jacqueline M. WHEATHCROFT, Eilif HJELSETH

Journal Article

Bamboo-like -doped carbon nanotubes encapsulating M(Co, Fe)-Ni alloy for electrochemical production of

Journal Article

Recent Advances in 19Fluorine Magnetic Resonance Imaging with Perfluorocarbon Emulsions

Wickline,Gregory M. Lanza

Journal Article

Hydraulic Pressure Extremes Ratio & Extremes Ratio Efficiencies

Qi Maolin

Journal Article

Pressure drop analysis on the positive half-cell of a cerium redox flow battery using computational fluid dynamics: Mathematical and modelling aspects of porous media

Fernando F. Rivera, Berenice Miranda-Alcántara, Germán Orozco, Carlos Ponce de León, Luis F. Arenas

Journal Article

Development of soft kernel durum wheat

Craig F. MORRIS

Journal Article

Controlling interstory drift ratio profiles via topology optimization strategies

Journal Article