检索范围:
排序: 展示方式:
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 579-592 doi: 10.15302/J-FASE-2023526
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.
关键词: agriculture air-water modeling European rivers nutrient pollution sewage systems source attribution
An enhanced environmental multimedia modeling system based on fuzzy-set approach: I.
Chesheng ZHAN,Rongrong ZHANG,Xiaomeng SONG,Baolin LIU
《环境科学与工程前沿(英文)》 2015年 第9卷 第3期 页码 494-505 doi: 10.1007/s11783-013-0609-x
关键词: environmental multimedia modelling fuzzy-set approach theoretical framework environmental protection
A neural network-based production process modeling and variable importance analysis approach in corn
《化学科学与工程前沿(英文)》 2023年 第17卷 第3期 页码 358-371 doi: 10.1007/s11705-022-2190-y
关键词: big data corn to sugar factory neural network variable importance analysis
An enhanced environmental multimedia modeling system based on fuzzy-set approach: II.
Rongrong ZHANG,Chesheng ZHAN,Xiaomeng SONG,Baolin LIU
《环境科学与工程前沿(英文)》 2015年 第9卷 第6期 页码 1025-1035 doi: 10.1007/s11783-014-0655-z
关键词: environmental multimedia modelling system fuzzy-set approach application model validation uncertainty analysis
Structural modeling of a typical gas turbine system
Naresh YADAV, Irshad Ahmad KHAN, Sandeep GROVER
《能源前沿(英文)》 2012年 第6卷 第1期 页码 57-79 doi: 10.1007/s11708-011-0164-8
关键词: system modeling gas turbine system evaluation graph theoretic approach
《机械工程前沿(英文)》 2022年 第17卷 第2期 doi: 10.1007/s11465-022-0678-2
关键词: pneumatic artificial muscles soft robot modeling approach principle of virtual work external load
Xiaoxiao XU, Patrick X. W. ZOU
《工程管理前沿(英文)》 2021年 第8卷 第1期 页码 17-31 doi: 10.1007/s42524-019-0091-7
关键词: system dynamics construction management problem and recommendation research directions literature review human factor
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
《农业科学与工程前沿(英文)》 2020年 第7卷 第3期 页码 289-295 doi: 10.15302/J-FASE-2020337
Soils provide the structural support, water and nutrients for plants in nature and are considered to be the foundation of agriculture production. Improving soil quality and soil health has been advocated as the goal of soil management toward sustainable agricultural intensification. There have been renewed efforts to define and quantify soil quality and soil health but establishing a consensus on the key indicators remains difficult. It is argued that such difficulties are due to the former ways of thinking in soil management which largely focus on soil properties alone. A systems approach that treats soils as a key component of agricultural production systems is promoted. It is argued that soil quality must be quantified in terms of crop productivity and impacts on ecosystems services that are also strongly driven by climate and management interventions. A systems modeling approach captures the interactions among climate, soil, crops and management, and their impacts on system performance, thus helping to quantify the value and quality of soils. Here, three examples are presented to demonstrate this. In this systems context, soil management must be an integral part of systems management practices that also include managing the crops and cropping systems under specific climatic conditions, with cognizance of future climate change.
关键词: APSIM available water capacity nitrogen management soil functional properties soil health soil-plant modeling
A Bayesian modeling approach to bi-directional pedestrian flows in carnival events
S. Q. XIE, S. C. WONG, William H. K. LAM
《工程管理前沿(英文)》 2017年 第4卷 第4期 页码 483-489 doi: 10.15302/J-FEM-2017023
关键词: pedestrian flow model bi-directional interactions empirical studies Bayesian inference
An approach to calculating allowable watershed pollutant loads
Yu GUO, Haifeng JIA
《环境科学与工程前沿(英文)》 2012年 第6卷 第5期 页码 658-671 doi: 10.1007/s11783-012-0446-3
关键词: Source water protection watershed management pollutants load allocation Environmental Fluid Dynamic Code (EFDC) modeling margin of safety statistical analysis
Implementation aspects of a phase-field approach for brittle fracture
G. D. HUYNH, X. ZHUANG, H. NGUYEN-XUAN
《结构与土木工程前沿(英文)》 2019年 第13卷 第2期 页码 417-428 doi: 10.1007/s11709-018-0477-3
Jorge Alberto Rodriguez DURAN,Ronney Mancebo BOLOY,Rafael Raider LEONI
《机械工程前沿(英文)》 2015年 第10卷 第3期 页码 255-262 doi: 10.1007/s11465-015-0342-1
The well-known fatigue crack growth (FCG) curves are two-parameter dependents. The range of the stress intensity factor ?K and the load ratio R are the parameters normally used for describing these curves. For engineering purposes, the mathematical representation of these curves should be integrated between the initial and final crack sizes in order to obtain the safety factors for stresses and life. First of all, it is necessary to reduce the dependence of the FCG curves to only one parameter. ?K is almost always selected and, in these conditions, considered as the crack driving force. Using experimental data from literature, the present paper shows how to perform multiple regression analyses using the traditional Walker approach and the more recent unified approach. The correlations so obtained are graphically analyzed in three dimensions. Numerical examples of crack growth analysis for cracks growing under nominal stresses of constant amplitude in smooth and notched geometries are performed, assuming an identical material component as that of the available experimental data. The resulting curves of crack size versus number of cycles (a vs. N) are then compared. The two models give approximately the same (a vs. N) curves in both geometries. Differences between the behaviors of the (avs. N) curves in smooth and notched geometries are highlighted, and the reasons for these particular behaviors are discussed.
关键词: fatigue crack propagation modeling life prediction mean stress effects
Fully integrated approach: an alternative solution of coupling a GIS and diffuse pollution models
S. LIU,R.E. BRAZIER,A. L. HEATHWAITE,W. LIU
《环境科学与工程前沿(英文)》 2014年 第8卷 第4期 页码 616-623 doi: 10.1007/s11783-013-0589-x
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
《环境科学与工程前沿(英文)》 2019年 第13卷 第4期 doi: 10.1007/s11783-019-1144-1
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.
关键词: Gravity sewer Modeling Pollutant transformation Biochemical reaction process
Izabela NIELSEN,Robert WÓJCIK,Grzegorz BOCEWICZ,Zbigniew BANASZAK
《信息与电子工程前沿(英文)》 2016年 第17卷 第4期 页码 338-347 doi: 10.1631/FITEE.1500359
关键词: Automated guided vehicles (AGVs) Scheduling Multimodal process Fuzzy constraints Optimization
标题 作者 时间 类型 操作
HOTSPOTS OF NUTRIENT LOSSES TO AIR AND WATER: AN INTEGRATED MODELING APPROACH FOR EUROPEAN RIVER BASINS
期刊论文
An enhanced environmental multimedia modeling system based on fuzzy-set approach: I.
Chesheng ZHAN,Rongrong ZHANG,Xiaomeng SONG,Baolin LIU
期刊论文
A neural network-based production process modeling and variable importance analysis approach in corn
期刊论文
An enhanced environmental multimedia modeling system based on fuzzy-set approach: II.
Rongrong ZHANG,Chesheng ZHAN,Xiaomeng SONG,Baolin LIU
期刊论文
Structural modeling of a typical gas turbine system
Naresh YADAV, Irshad Ahmad KHAN, Sandeep GROVER
期刊论文
Design and modeling of a novel soft parallel robot driven by endoskeleton pneumatic artificial muscles
期刊论文
System dynamics analytical modeling approach for construction project management research: A critical
Xiaoxiao XU, Patrick X. W. ZOU
期刊论文
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
期刊论文
A Bayesian modeling approach to bi-directional pedestrian flows in carnival events
S. Q. XIE, S. C. WONG, William H. K. LAM
期刊论文
Implementation aspects of a phase-field approach for brittle fracture
G. D. HUYNH, X. ZHUANG, H. NGUYEN-XUAN
期刊论文
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
期刊论文
Fully integrated approach: an alternative solution of coupling a GIS and diffuse pollution models
S. LIU,R.E. BRAZIER,A. L. HEATHWAITE,W. LIU
期刊论文
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
期刊论文