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1. Sequential Model-Based A-Optimal Design of Experiments When the Fisher Information Matrix Is Noninvertible

Author:
Shahmohammadi, Ali; McAuley, Kimberley B.
Source:
Industrial & engineering chemistry process design and development 2018 v.58 no.3 pp. 1244-1261
ISSN:
1520-5045
Subject:
dynamic models,   etc   ; Monte Carlo method; experimental design; process design; regression analysis;     Show all 5 Subjects
Abstract:
... The sequential model-based optimal design of experiments (e.g., A-, D-, and E-optimal design) is a well-known technique for selecting experimental conditions that lead to informative data for obtaining reliable parameter estimates and model predictions. An important computational step for selecting new model-based experiments is to compute the inverse of the Fisher information matrix (FIM) which m ...
DOI:
10.1021/acs.iecr.8b03047

2. Effects of momentum ratio and velocity difference on combustion performance in lignite-fired pulverized boiler

Author:
Li, Zixiang; Miao, Zhengqing; Shen, Xusheng; Li, Jiangtao
Source:
Energy 2018 v.165 pp. 825-839
ISSN:
0360-5442
Subject:
dynamic models,   etc   ; air; air flow; combustion; heat transfer; momentum; temperature;     Show all 7 Subjects
Abstract:
... To study the effects of momentum ratio and velocity difference between primary and secondary air flow on boiler performance, simulation work was conducted on a lignite-fired boiler within a three dimension computational fluid dynamics model. Within the model, 8 cases were simulated where momentum ratio and velocity difference vary among cases. The distributions of combustion temperature, radiative ...
DOI:
10.1016/j.energy.2018.09.082

3. Cell Membranes Resist Flow

Author:
Shi, Zheng; Graber, Zachary T.; Baumgart, Tobias; Stone, Howard A.; Cohen, Adam E.
Source:
Cell 2018 v.175 no.7 pp. 1769-1779.e13
ISSN:
0092-8674
Subject:
dynamic models,   etc   ; diffusivity; endothelial cells; flow resistance; human cell lines; ion channels; plasma membrane; transmembrane proteins;     Show all 8 Subjects
Abstract:
... The fluid-mosaic model posits a liquid-like plasma membrane, which can flow in response to tension gradients. It is widely assumed that membrane flow transmits local changes in membrane tension across the cell in milliseconds, mediating long-range signaling. Here, we show that propagation of membrane tension occurs quickly in cell-attached blebs but is largely suppressed in intact cells. The failu ...
DOI:
10.1016/j.cell.2018.09.054

4. How transport shapes copepod distributions in relation to whale feeding habitat: Demonstration of a new modelling framework

Author:
Brennan, Catherine E.; Maps, Frédéric; Gentleman, Wendy C.; Plourde, Stéphane; Lavoie, Diane; Chassé, Joël; Lehoux, Caroline; Krumhansl, Kira A.; Johnson, Catherine L.
Source:
Progress in oceanography 2018
ISSN:
0079-6611
Subject:
dynamic models,   etc   ; Calanus finmarchicus; Eubalaena glacialis; advection; autumn; habitats; model validation; monitoring; mortality; risk; statistical models; summer; swimming; whales; Gulf of Saint Lawrence;     Show all 15 Subjects
Abstract:
... Two copepod species, Calanus finmarchicus and Calanus hyperboreus, constitute the main prey of endangered North Atlantic right whales in eastern Canadian shelf waters. Estimating the spatial distribution of Calanus spp. and understanding how it changes in response to environmental variability are crucial information requirements for mitigating risks to the right whale population. Here we present a ...
DOI:
10.1016/j.pocean.2018.12.005

5. Some Structural Properties of Reaction Systems Useful For Estimation and Control

Author:
Dochain, D.
Source:
Industrial & engineering chemistry process design and development 2018 v.58 no.30 pp. 13642-13650
ISSN:
1520-5045
Subject:
dynamic models,   etc   ; ecosystems; process design; reaction kinetics;     Show all 4 Subjects
Abstract:
... The objective of this text is to give an overview of some structural properties of the dynamical models of reaction systems, in particular (but not uniquely) of chemical and biochemical systems as well as environmental and ecological systems, that can be interesting for the analysis and the design of process estimation and control tools. We shall in particular consider the notion of reaction invar ...
DOI:
10.1021/acs.iecr.8b04577

6. Comparison between two methods of estimation of chilling and heat requirements for flowering in almond

Author:
Gaeta, L.; Stellacci, A. M.; Losciale, P.
Source:
Acta horticulturae 2018 no.1229 pp. 135-142
ISSN:
0567-7572
Subject:
dynamic models,   etc   ; almonds; cold treatment; cultivars; dormancy breaking; flowering; genotype; heat; laboratory experimentation; semiarid zones; statistical models; temperature; weather; Italy;     Show all 14 Subjects
Abstract:
... A precise determination of thermic requirements (chilling and heat) for breaking dormancy is quite difficult under field conditions. However, quantification under laboratory conditions should be considered with caution and it is costly and time consuming when analyzing a large number of genotypes. For this reason, statistical models based on the analysis of historical blooming dates have been deve ...
DOI:
10.17660/ActaHortic.2018.1229.21

7. Estimation of chilling and heat requirements of early, extra-late and ultra-late almond cultivars during cold and warm seasons

Author:
Prudencio, A. S.; Martinez-Gomez, P.; Dicenta, F.
Source:
Acta horticulturae 2018 no.1229 pp. 115-120
ISSN:
0567-7572
Subject:
dynamic models,   etc   ; Prunus jacquemontii; almonds; buds; climatic factors; cold; cold treatment; cultivars; dormancy; dormancy breaking; flowering date; fruit set; heat; temperature; vegetative growth;     Show all 15 Subjects
Abstract:
... Flowering time in almond is a complex process involving chill and heat requirements. After being exposed to periods of low and high temperatures, the buds are able to break its dormancy and sprout or flower. For a suitable flowering, vegetative growth and fruit set, chilling requirements have to be fully satisfied. In cold areas, where the new almond orchards are being stablished, late-flowering i ...
DOI:
10.17660/ActaHortic.2018.1229.18

8. Inter-annual rainfall variability may foster lake regime shifts: An example from Lake Bourget in France

Author:
Brias, Antoine; Mathias, Jean-Denis; Deffuant, Guillaume
Source:
Ecological modelling 2018 v.389 pp. 11-18
ISSN:
0304-3800
Subject:
dynamic models,   etc   ; climate change; compliance; drought; eutrophication; floods; lakes; phosphorus; pollution load; rain; risk; standard deviation; France;     Show all 13 Subjects
Abstract:
... The Intergovernmental Panel on Climate Change anticipates increasing extreme rain events in the 21st century, leading to more frequent floods and more phosphorus transported into lakes, enhancing the risk of their eutrophication. This paper reports research assessing this risk on Lake Bourget in France, by coupling a statistical estimation of annual phosphorus transportation from annual rainfall a ...
DOI:
10.1016/j.ecolmodel.2018.10.004

9. Dynamic Modeling of Sediment Budget in Shihmen Reservoir Watershed in Taiwan

Author:
Chen, Yi-Chin; Wu, Ying-Hsin; Shen, Che-Wei; Chiu, Yu-Jia
Source:
Water 2018 v.10 no.12
ISSN:
2073-4441
Subject:
dynamic models,   etc   ; Universal Soil Loss Equation; algorithms; landslides; mountains; rain; runoff; sediment transport; sediment yield; sediments; soil erosion; soil water; sustainable development; tanks; typhoons; water management; watersheds; Taiwan;     Show all 18 Subjects
Abstract:
... Qualifying sediment dynamic in a reservoir watershed is essential for water resource management. This study proposed an integrated model of Grid-based Sediment Production and Transport Model (GSPTM) at watershed scale to evaluate the dynamic of sediment production and transport in the Shihmen Reservoir watershed in Taiwan. The GSPTM integrates several models, revealing landslide susceptibility and ...
DOI:
10.3390/w10121808

10. Feedback Real-Time Optimization Strategy Using a Novel Steady-state Gradient Estimate and Transient Measurements

Author:
Krishnamoorthy, Dinesh; Jahanshahi, Esmaeil; Skogestad, Sigurd
Source:
Industrial & engineering chemistry process design and development 2018 v.58 no.1 pp. 207-216
ISSN:
1520-5045
Subject:
dynamic models,   etc   ; controllers; process design;     Show all 3 Subjects
Abstract:
... This paper presents a new feedback real-time optimization (RTO) strategy for steady-state optimization that directly uses transient measurements. The proposed RTO scheme is based on controlling the estimated steady-state gradient of the cost function using feedback. The steady-state gradient is estimated using a novel method based on linearizing a nonlinear dynamic model around the current operati ...
DOI:
10.1021/acs.iecr.8b03137

11. A dynamic transport model for quantification of norovirus internalization in lettuce from irrigation water and associated health risk

Author:
Chandrasekaran, Srikiran; Jiang, Sunny C.
Source:
The Science of the total environment 2018 v.643 pp. 751-761
ISSN:
0048-9697
Subject:
dynamic models,   etc   ; Norovirus; United States Environmental Protection Agency; World Health Organization; culture media; differential equation; food crops; food production; freshwater; harvest date; humans; hydroponics; irrigation scheduling; irrigation water; issues and policy; lettuce; monitoring; pathogens; plant growth; public health; quantitative risk assessment; risk; risk reduction; roots; shoots; soil; transpiration; viral load; wastewater; water reuse;     Show all 30 Subjects
Abstract:
... Food production using recycled wastewater offers a sustainable way forward in light of limited freshwater resources. However, concerns of food safety should be addressed to protect public health. To this end, we developed a dynamic transport model to track norovirus from the irrigation water to the root and shoot of lettuce during the growth period. These processes were embodied in a system of ord ...
DOI:
10.1016/j.scitotenv.2018.06.158

12. Design and dynamic modeling of printed circuit heat exchangers for supercritical carbon dioxide Brayton power cycles

Author:
Jiang, Yuan; Liese, Eric; Zitney, Stephen E.; Bhattacharyya, Debangsu
Source:
Applied energy 2018 v.231 pp. 1019-1032
ISSN:
0306-2619
Subject:
dynamic models,   etc   ; carbon dioxide; fluid mechanics; friction; heat; heat exchangers; heat transfer coefficient; manufacturing;     Show all 8 Subjects
Abstract:
... Due to the unique geometries and hydraulics of printed circuit heat exchangers and rapidly changing properties of supercritical carbon dioxide, the effective design and rating of printed circuit heat exchangers is an essential requirement for their use in supercritical carbon dioxide power cycles. In this study, one-dimensional design and dynamic models have been developed in Aspen Custom Modeler ...
DOI:
10.1016/j.apenergy.2018.09.193

13. Design optimisation and performance appraisal of a combined cooling, heating and power system primed with Maisotsenko combustion turbine cycle

Author:
Zhu, Guangya; Chow, T.T.; Fong, K.F.; Lee, C.K.; Luo, X.J.
Source:
Energy conversion and management 2018 v.177 pp. 91-106
ISSN:
0196-8904
Subject:
dynamic models,   etc   ; algorithms; buildings; climatic factors; combustion; cooling; cost effectiveness; energy conservation; energy costs; fuels; pollutants; power generation; prices; primary energy; summer;     Show all 15 Subjects
Abstract:
... Buildings are the significant primary energy consumption and pollutant emission contributors in a modern city. Distributed multi-generation systems such as combined cooling, heating and power (CCHP) systems are considered an alternative to fulfil the energy saving requirements in the building sectors. In this study, a CCHP system primed with Maisotsenko combustion turbine cycle (MCTC) was consider ...
DOI:
10.1016/j.enconman.2018.09.048

14. Mathematical formulation of alpha -type Stirling engine with Ross Yoke mechanism

Author:
Bataineh, Khaled
Source:
Energy 2018 v.164 pp. 1178-1199
ISSN:
0360-5442
Subject:
dynamic models,   etc   ; engines; equations; heat; model validation; temperature; thermodynamic models;     Show all 7 Subjects
Abstract:
... The objective of this article is to develop a combined thermodynamic and dynamic model for alpha -type Stirling engine with Ross Yoke mechanism. Thermal, pumping, and regeneration loses are considered in developing the thermodynamic model. Two methods for solving the governing equations are proposed. In both solution schemes, the gas forces exerted in compression and expansion chamber are obtained ...
DOI:
10.1016/j.energy.2018.08.134

15. Numerical and experimental study on noise reduction of concrete LRT bridges

Author:
Song, Xiaodong; Li, Qi
Source:
The Science of the total environment 2018 v.643 pp. 208-224
ISSN:
0048-9697
Subject:
dynamic models,   etc   ; bridges (infrastructure); concrete; noise control; noise pollution; prediction; sounds; vibration;     Show all 8 Subjects
Abstract:
... Rolling noise and structure-borne noise radiating from the bridge are two major sources of noise in light rapid transit (LRT) bridges. To control the noise radiation from LRT bridges, an efficient numerical method for noise prediction is needed. In this study, a combined three-dimensional dynamic model and 2.5-dimensional acoustic model were used to investigate noise reduction in a rail and in a U ...
DOI:
10.1016/j.scitotenv.2018.06.179

16. RANS modelling of a lifted hydrogen flame using eulerian/lagrangian approaches with transported PDF method

Author:
Larbi, Ahmed Amine; Bounif, Abdelhamid; Senouci, Mohamed; Gökalp, Iskender; Bouzit, Mohamed
Source:
Energy 2018 v.164 pp. 1242-1256
ISSN:
0360-5442
Subject:
dynamic models,   etc   ; carbon monoxide; chemical reactions; environmental factors; equations; hydrogen; mixing; nitrogen oxides; physical models; prediction; probability; probability distribution; reaction mechanisms; statistical models; temperature; turbulent flow;     Show all 16 Subjects
Abstract:
... In this study, the eulerian probability density function approach (EPDF) has been applied to simulate turbulent diffusion flame in a Vitiated Coflow. EPDF is the eulerian method to solve the PDF transport equations with a direct-quadrature-method-of-moments (DQMOM) closure. The PDF transport equation represented by a set of governing equations for the probability of occurrence in any environmental ...
DOI:
10.1016/j.energy.2018.08.073

17. Realization of novel constant rate of kinetic energy change (CRKEC) supersonic ejector

Author:
Kumar, Virendra; Singhal, Gaurav; Subbarao, P.M.V.
Source:
Energy 2018 v.164 pp. 694-706
ISSN:
0360-5442
Subject:
dynamic models,   etc   ; air; energy transfer; enthalpy; equations; kinetic energy; momentum; prediction; prototypes; turbulent flow;     Show all 10 Subjects
Abstract:
... Ejectors invariably convert momentum and kinetic energy of incoming fluids into enthalpy and hence pressure. Since ejectors are primarily viewed as energy exchange devices, it would be appropriate to design an ejector with its geometry being a function of the rate of energy change. This would shift ejector design approach from conventional geometry based one to that of flow physics-based approach. ...
DOI:
10.1016/j.energy.2018.08.184

18. System dynamics simulation for optimal stream flow regulations under consideration of coordinated development of ecology and socio-economy in the Weihe River Basin, China

Author:
Song, Jinxi; Tang, Bin; Zhang, Junlong; Dou, Xinyi; Liu, Qi; Shen, Weibo
Source:
Ecological engineering 2018 v.124 pp. 51-68
ISSN:
0925-8574
Subject:
dynamic models,   etc   ; basins; ecology; issues and policy; socioeconomic development; socioeconomics; stream flow; water resources; watersheds; China;     Show all 10 Subjects
Abstract:
... A system dynamics model (SDM) is developed to assess the dynamic changes in water resources and the impacts of different policies and measures in the Weihe River Basin. The purpose of the model is to enhance understanding of the dynamic behavior of this interactive system and to provide decision support to promote the sustainable utilization of water resources and the coordinated development of so ...
DOI:
10.1016/j.ecoleng.2018.09.024

19. The Study of Movement of the Wide Span Tractor-Based Field Machine Unit with Power Method of its Control

Author:
Bulgakov, Volodymyr; Kuvachov, Volodymyr; Nozdrovický, Ladislav; Findura, Pavol; Smolinskyi, Stanislav; Ihnatiev, Yevhen
Source:
Acta technologica agriculturae 2018 v.21 no.4 pp. 160-165
ISSN:
1338-5267
Subject:
dynamic models,   etc   ; automation; control methods; controlled traffic systems; energy; mathematical models; mechanics; reproduction; tractors;     Show all 9 Subjects
Abstract:
... Recently, rapid development of controlled traffic farming convincingly demonstrates the broad prospects of using the wide span tractor-based field machines throughout the world. The issue at hand lies in the fact that having a wide span tractor-based machine with steering-wheel system moving along the tracks of a constant technological track is not a rational option. According to the concept of br ...
DOI:
10.2478/ata-2018-0029

20. Advances in Mechanistic Approaches to Quantifying Biophysical Fire Effects

Author:
O’Brien, J. J.; Hiers, J. K.; Varner, J. M.; Hoffman, C. M.; Dickinson, M. B.; Michaletz, S. T.; Loudermilk, E. L.; Butler, B. W.
Source:
Current forestry reports 2018 v.4 no.4 pp. 161-177
ISSN:
2198-6436
Subject:
dynamic models,   etc   ; analytical methods; biogeochemistry; energy transfer; fire behavior; fire ecology; fires; forestry; heat transfer; mass transfer; mortality; population dynamics; soil heating; stems; tree damage;     Show all 15 Subjects
Abstract:
... PURPOSE OF REVIEW: The search for causal mechanisms in fire ecology has been slow to progress for two main reasons. First, many fire ecology investigations often occur after fires, with no detailed information on fire behavior. These fire effects are then used to infer both fire behavior and the subsequent effects themselves. Second, that fire behavior is heterogeneous at many scales both spatiall ...
DOI:
10.1007/s40725-018-0082-7