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HOTSPOTS OF NUTRIENT LOSSES TO AIR AND WATER: AN INTEGRATED MODELING APPROACH FOR EUROPEAN RIVER BASINS

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4,   Pages 579-592 doi: 10.15302/J-FASE-2023526

Abstract:

Nutrient pollution of air and water is a persistent problem in Europe. However, the pollution sources are often analyzed separately, preventing the formulation of integrative solutions. This study aimed to quantify the contribution of agriculture to air, river and coastal water pollution by nutrients. A new MARINA-Nutrients model was developed for Europe to calculate inputs of nitrogen (N) and phosphorus (P) to land and rivers, N emissions to air, and nutrient export to seas by river basins. Under current practice, inputs of N and P to land were 34.4 and 1.8 Tg·yr–1, respectively. However, only 12% of N and 3% of P reached the rivers. Agriculture was responsible for 55% of N and sewage for 67% of P in rivers. Reactive N emissions to air from agriculture were calculated at 4.0 Tg·yr–1. Almost two-fifths of N emissions to air were from animal housing and storage. Nearly a third of the basin area was considered as pollution hotspots and generated over half of N emissions to air and nutrient pollution in rivers. Over 25% of river export of N ended up in the Atlantic Ocean and of P in the Mediterranean Sea. These results could support environmental policies to reduce both air and water pollution simultaneously, and avoid pollution swapping.

Keywords： agriculture     air-water modeling     European rivers     nutrient pollution     sewage systems     source attribution    

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An enhanced environmental multimedia modeling system based on fuzzy-set approach: I.

Chesheng ZHAN,Rongrong ZHANG,Xiaomeng SONG,Baolin LIU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3,   Pages 494-505 doi: 10.1007/s11783-013-0609-x

Abstract: Multimedia environmental modeling is extremely complex due to the intricacy of the systems with the considerationIn this study, a new user-friendly fuzzy-set enhanced environmental multimedia modeling system (FEEMMShave been achieved through dynamically quantifying the intermedia mass flux; incorporating fuzzy-set approachinto environmental multimedia modeling system (EMMS); and designing a user-friendly graphic user interfaceby contaminants released from a contaminated site; and quantifying the uncertainties associated with modeling

Keywords： environmental multimedia modelling     fuzzy-set approach     theoretical framework     environmental protection    

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A neural network-based production process modeling and variable importance analysis approach in corn

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3,   Pages 358-371 doi: 10.1007/s11705-022-2190-y

Abstract: In this paper, a neural network-based production process modeling and variable importance analysis approachdimensionality reduction, multilayer perceptron/convolutional neural network/recurrent neural network based modeling

Keywords： big data     corn to sugar factory     neural network     variable importance analysis    

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An enhanced environmental multimedia modeling system based on fuzzy-set approach: II.

Rongrong ZHANG,Chesheng ZHAN,Xiaomeng SONG,Baolin LIU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 6,   Pages 1025-1035 doi: 10.1007/s11783-014-0655-z

Abstract: Part I of this study develops an enhanced environmental multimedia modeling system (EMMS) based on fuzzy-setapproach.The modules of EMMS could support the entire environmental multimedia modeling system.Most of the modeling yields closely match the monitoring data collected from sites.In addition, with the aid of fuzzy-set approach, EMMS can be a reliable and powerful tool to address

Keywords： environmental multimedia modelling system     fuzzy-set approach     application     model validation     uncertainty    

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Structural modeling of a typical gas turbine system

Naresh YADAV, Irshad Ahmad KHAN, Sandeep GROVER

Frontiers in Energy 2012, Volume 6, Issue 1,   Pages 57-79 doi: 10.1007/s11708-011-0164-8

Abstract: This paper presents an approach for the structural modeling and analysis of a typical gas turbine systemThis approach has been applied to the systems and subsystems, which are integral parts of a typical gassuch subsystems contributing to overall gas turbine system functional evaluation using graph theoretic approach

Keywords： system modeling     gas turbine system evaluation     graph theoretic approach    

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Design and modeling of a novel soft parallel robot driven by endoskeleton pneumatic artificial muscles

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0678-2

Abstract: A novel kinematic modeling method for variable-curvature soft robots based on the minimum energy methodThe prototype and modeling method can provide a new perspective for soft robot design, modeling, and

Keywords： pneumatic artificial muscles     soft robot     modeling approach     principle of virtual work     external load    

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System dynamics analytical modeling approach for construction project management research: A critical

Xiaoxiao XU, Patrick X. W. ZOU

Frontiers of Engineering Management 2021, Volume 8, Issue 1,   Pages 17-31 doi: 10.1007/s42524-019-0091-7

Abstract: Over the last two decades, considerable researches that use system dynamics (SD) as an analytical and modelingapproach exist to address construction project management issues.and change management; (3) risk management; (4) resource management; (5) decision making; (6) hybrid modeling

Keywords： system dynamics     construction management     problem and recommendation     research directions     literature review     human factor    

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Using a systems modeling approach to improve soil management and soil quality

Enli WANG, Di HE, Zhigan ZHAO, Chris J. SMITH, Ben C. T. MACDONALD

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 3,   Pages 289-295 doi: 10.15302/J-FASE-2020337

Abstract: A systems approach that treats soils as a key component of agricultural production systems is promotedA systems modeling approach captures the interactions among climate, soil, crops and management, and

Keywords： APSIM     available water capacity     nitrogen management     soil functional properties     soil health     soil-plant modeling    

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A Bayesian modeling approach to bi-directional pedestrian flows in carnival events

S. Q. XIE, S. C. WONG, William H. K. LAM

Frontiers of Engineering Management 2017, Volume 4, Issue 4,   Pages 483-489 doi: 10.15302/J-FEM-2017023

Abstract: Bi-directional pedestrian flows are common at crosswalks, footpaths, and shopping areas. However, the properties of pedestrian movement may vary in urban areas according to the type of walking facility. In recent years, crowd movements at carnival events have attracted the attention of researchers. In contrast to pedestrian behavior in other walking facilities, pedestrians whose attention is attracted by carnival displays or activities may slow down and even stop walking. The Lunar New Year Market is a traditional carnival event in Hong Kong held annually one week before the Lunar New Year. During the said event, crowd movements can be easily identified, particularly in Victoria Park, where the largest Lunar New Year Market in Hong Kong is hosted. In this study, we conducted a video-based observational survey to collect pedestrian flow and speed data at the Victoria Park Lunar New Year Market on the eve of the Lunar New Year. Using the collected data, an extant mathematical model was calibrated to capture the relationships between the relevant macroscopic quantities, thereby providing insight into pedestrian behavior at the carnival event. Bayesian inference was employed to calibrate the model by using prior data obtained from a previous controlled experiment. Results obtained enhance our understanding of crowd behavior under different conditions at carnival events, thus facilitating the improvement of the safety and efficiency of similar events in the future.

Keywords： pedestrian flow model     bi-directional interactions     empirical studies     Bayesian inference    

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An approach to calculating allowable watershed pollutant loads

Yu GUO, Haifeng JIA

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 658-671 doi: 10.1007/s11783-012-0446-3

Abstract: To improve the management of discharge pollutants loads in the reservoirs’ watershed, an approach ofEstablishment of the approach framework was described at first.Under the guidance of this framework, two major steps were as follows: modeling and scenario analysisIn modeling step, spatial discretization for establishing cell map in model, data preprocessing, parameterAs a result of the research, the model-based approach presented as a combination of estimation and precise

Keywords： protection     watershed management     pollutants load allocation     Environmental Fluid Dynamic Code (EFDC) modeling    

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Implementation aspects of a phase-field approach for brittle fracture

G. D. HUYNH, X. ZHUANG, H. NGUYEN-XUAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 417-428 doi: 10.1007/s11709-018-0477-3

Abstract: This paper provides a comprehensive overview of a phase-field model of fracture in solid mechanics setting. We start reviewing the potential energy governing the whole process of fracture including crack initiation, branching or merging. Then, a discretization of system of equation is derived, in which the key aspect is that for the correctness of fracture phenomena, a split into tensile and compressive terms of the strain energy is performed, which allows crack to occur in tension, not in compression. For numerical analysis, standard finite element shape functions are used for both primary fields including displacements and phase field. A staggered scheme which solves the two fields of the problem separately is utilized for solution step and illustrated with a segment of Python code.

Keywords： phase-field modeling     FEM     staggered scheme     fracture    

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Some remarks on the engineering application of the fatigue crack growth approach under nonzero mean loads

Jorge Alberto Rodriguez DURAN,Ronney Mancebo BOLOY,Rafael Raider LEONI

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3,   Pages 255-262 doi: 10.1007/s11465-015-0342-1

Abstract: literature, the present paper shows how to perform multiple regression analyses using the traditional Walker approachand the more recent unified approach.

Keywords： fatigue crack propagation modeling     life prediction     mean stress effects    

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Fully integrated approach: an alternative solution of coupling a GIS and diffuse pollution models

S. LIU,R.E. BRAZIER,A. L. HEATHWAITE,W. LIU

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 4,   Pages 616-623 doi: 10.1007/s11783-013-0589-x

Abstract: visualization and analysis of spatially referred information, GIS has been recognized as a method to aid the modelingA common question in integrating diffuse pollution models and GIS is to choose a suitable coupling approachIt is concluded that the fully integrated approach can avoid tanglesome data exchange and routine execution

Keywords： diffuse pollution     GIS     modeling     nutrients     phosphorus    

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A comprehensive simulation approach for pollutant bio-transformation in the gravity sewer

Nan Zhao, Huu Hao Ngo, Yuyou Li, Xiaochang Wang, Lei Yang, Pengkang Jin, Guangxi Sun

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 4, doi: 10.1007/s11783-019-1144-1

Abstract:

A comprehensive pollutant transformation model for sewer systems is established.

The model comprises fermentation, sulfate reduction and ammonification processes.

Biochemical reactions related to distinct carbon sources are depicted in the model.

Pollutant transformation is attributed to different biochemical reaction processes.

Keywords： Gravity sewer     Modeling     Pollutant transformation     Biochemical reaction process    

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Multimodal processes optimization subject to fuzzy operation time constraints: declarative modeling approach

Izabela NIELSEN,Robert WÓJCIK,Grzegorz BOCEWICZ,Zbigniew BANASZAK

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 4,   Pages 338-347 doi: 10.1631/FITEE.1500359

Abstract: The aim of the paper is to present a constraint propagation (CP) driven approach to multi-robot task

Keywords： Automated guided vehicles (AGVs)     Scheduling     Multimodal process     Fuzzy constraints     Optimization    

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Title Author Date Type Operation

HOTSPOTS OF NUTRIENT LOSSES TO AIR AND WATER: AN INTEGRATED MODELING APPROACH FOR EUROPEAN RIVER BASINS

Journal Article

An enhanced environmental multimedia modeling system based on fuzzy-set approach: I.

Chesheng ZHAN,Rongrong ZHANG,Xiaomeng SONG,Baolin LIU

Journal Article

A neural network-based production process modeling and variable importance analysis approach in corn

Journal Article

An enhanced environmental multimedia modeling system based on fuzzy-set approach: II.

Rongrong ZHANG,Chesheng ZHAN,Xiaomeng SONG,Baolin LIU

Journal Article

Structural modeling of a typical gas turbine system

Naresh YADAV, Irshad Ahmad KHAN, Sandeep GROVER

Journal Article

Design and modeling of a novel soft parallel robot driven by endoskeleton pneumatic artificial muscles

Journal Article

System dynamics analytical modeling approach for construction project management research: A critical

Xiaoxiao XU, Patrick X. W. ZOU

Journal Article

Using a systems modeling approach to improve soil management and soil quality

Enli WANG, Di HE, Zhigan ZHAO, Chris J. SMITH, Ben C. T. MACDONALD

Journal Article

A Bayesian modeling approach to bi-directional pedestrian flows in carnival events

S. Q. XIE, S. C. WONG, William H. K. LAM

Journal Article

An approach to calculating allowable watershed pollutant loads

Yu GUO, Haifeng JIA

Journal Article

Implementation aspects of a phase-field approach for brittle fracture

G. D. HUYNH, X. ZHUANG, H. NGUYEN-XUAN

Journal Article

Some remarks on the engineering application of the fatigue crack growth approach under nonzero mean loads

Jorge Alberto Rodriguez DURAN,Ronney Mancebo BOLOY,Rafael Raider LEONI

Journal Article

Fully integrated approach: an alternative solution of coupling a GIS and diffuse pollution models

S. LIU,R.E. BRAZIER,A. L. HEATHWAITE,W. LIU

Journal Article

A comprehensive simulation approach for pollutant bio-transformation in the gravity sewer

Nan Zhao, Huu Hao Ngo, Yuyou Li, Xiaochang Wang, Lei Yang, Pengkang Jin, Guangxi Sun

Journal Article

Multimodal processes optimization subject to fuzzy operation time constraints: declarative modeling approach

Izabela NIELSEN,Robert WÓJCIK,Grzegorz BOCEWICZ,Zbigniew BANASZAK

Journal Article