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Science-based Engineering R & D of Complex Systems

Xu Zhilei

Strategic Study of CAE 2002, Volume 4, Issue 10,   Pages 26-30

Abstract:

Nuclear weapons are complex systems with special requirements on effectiveness, safety and reliabilityTo further study mechanics and material science for environmental adaptability of the complex systemsThe most important issues are theoretical modeling and test designing.development in the 21st century, applications of computer simulations will be speed up for complex systems

Keywords： complex systems     nuclear weapons     computer simulation     modeling of functional systems    

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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, andIn this systems context, soil management must be an integral part of systems management practices thatalso include managing the crops and cropping systems under specific climatic conditions, with cognizance

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

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Hydrologic experiments and modeling of two laboratory bioretention systems under different boundary conditions

Ruifen Liu, Elizabeth Fassman-Beck

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 4, doi: 10.1007/s11783-017-0951-5

Abstract: Hydrologic performance of bioretention systems is significantly influenced by the media composition andThis research measured hydrologic performance of column-scale bioretention systems during a syntheticMore research is needed on the analysis and modeling of hydrologic process in bioretention with IWS drainage

Keywords： Bioretention     Hydrologic process     Underdrain configuration     SWMM     Modeling    

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Discrete-event stochastic systems with correlated inputs: Modeling and performance evaluation

Frontiers of Engineering Management 2022, Volume 9, Issue 2,   Pages 214-220 doi: 10.1007/s42524-022-0192-6

Abstract: In the majority of the previous works on discrete-event stochastic systems, they have been assumed toFurthermore, the performance measures of the systems with correlated inputs can be significantly differentIn this paper, we provide an overview on some commonly used methods for modeling correlated input processesdiscuss the difficulties and possible future research topics in the study of discrete-event stochastic systems

Keywords： discrete-event stochastic system     correlated input     performance evaluation    

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Predictive Functional Control Based on Fuzzy Model for HVAC Systems

Lu Hongli,Jia Lei,Wang Lei,Gao Rui

Strategic Study of CAE 2006, Volume 8, Issue 9,   Pages 65-68

Abstract:

In HVAC systems, there exist severe nonlinearity, time-varying nature, disturbances and uncertaintyA novel predictive functional control strategy based on Takagi-Sugeno fuzzy model was developed in orderto settie the difficulty to control HVAC systems.Finally, the simulation results in HVAC systems control application showed that the proposed fuzzy modelpredictive functional control approach improves tracking effect and robustness.

Keywords： T-S fuzzy model     predictive functional control     least squares method     HVAC systems    

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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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DESIGNING DIVERSIFIED CROPPING SYSTEMS IN CHINA: THEORY, APPROACHES AND IMPLEMENTATION

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 3,   Pages 362-372 doi: 10.15302/J-FASE -2021392

Abstract: Achieving green transformation of agriculture in China requires fundamental restructuring of cropping systemsThen, it is necessary to optimize existing and/or design novel cropping systems based upon farming practicesNext, the resulting diversified cropping systems need to be evaluated and examined by employing experimentaland modeling approaches.is used as an example to illustrate the strategic plan to optimize and design diversified cropping systems

Keywords： Agriculture Green Development ， crop diversification ， cropping system modeling ， ecosystem services    

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Smart systems engineering contributing to an intelligent carbon-neutral future: opportunities, challenges

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 1023-1029 doi: 10.1007/s11705-022-2142-6

Abstract: This communication paper provides an overview of multi-scale smart systems engineering (SSE) approachesmajor focus of this interdisciplinary field is on the design, operation and management of multi-scale systems

Keywords： machine learning     modeling     material     industrial applications     environment    

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A Numerical Convex Lens for the State-Discretized Modeling and Simulation of Megawatt Power ElectronicsSystems as Generalized Hybrid Systems Article

Bochen Shi, Zhengming Zhao, Yicheng Zhu, Zhujun Yu, Jiahe Ju

Engineering 2021, Volume 7, Issue 12,   Pages 1766-1777 doi: 10.1016/j.eng.2021.07.011

Abstract:

Modeling and simulation have emerged as an indispensable approach to create numerical experiment platformsand study engineering systems.modeling and simulation approaches.Such complicated systems, which are composed of not only continuous states but also discrete events,this challenge, this paper proposes the numerical convex lens approach to achieve state-discretized modeling

Keywords： Generalized hybrid systems     Megawatt power electronics     Modeling and simulation     Numerical convex lens    

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Development and applications of functional gene microarrays in the analysis of the functional diversity

Zhili HE, Joy D. VAN NOSTRAND, Ye DENG, Jizhong ZHOU

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 1,   Pages 1-20 doi: 10.1007/s11783-011-0301-y

Abstract: Functional gene arrays (FGAs) are a special type of microarrays containing probes for key genes involvedin microbial functional processes, such as biogeochemical cycling of carbon, nitrogen, sulfur, phosphorusSeveral generations of GeoChip have been developed and applied to investigate the functional diversity

Keywords： functional gene arrays (FGAs)     GeoChip     microbial communities     functional diversity/composition/structure    

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DESIGNING DIVERSIFIED CROPPING SYSTEMS IN CHINA: THEORY, APPROACHES AND IMPLEMENTATION

Wen-Feng CONG, Chaochun ZHANG, Chunjie LI, Guangzhou WANG, Fusuo ZHANG

Frontiers of Agricultural Science and Engineering   Pages 362-372 doi: 10.15302/J-FASE-2021392

Abstract: Achieving green transformation of agriculture in China requires fundamental restructuring of cropping systemsThen, it is necessary to optimize existing and/or design novel cropping systems based upon farming practicesNext, the resulting diversified cropping systems need to be evaluated and examined by employing experimentaland modeling approaches.is used as an example to illustrate the strategic plan to optimize and design diversified cropping systems

Keywords： Agriculture Green Development     crop diversification     cropping system modeling     ecosystem services     sustainable    

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Effects of design parameters on performance and cost analysis of combined ultraviolet-biofilter systemstreating gaseous chlorobenzene based on mathematical modeling

Can WANG, Jinying XI, Hongying HU, Insun KANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 4,   Pages 588-594 doi: 10.1007/s11783-012-0433-8

Abstract: A conceptual mathematical model was used to evaluate the design parameters of a combined ultraviolet (UV)-biofilter system, and perform a cost analysis. Results showed that the UV light source strength and the gas residence times in the UV system (UVRT) and biofilter (EBRT) had positive effects on the overall chlorobenzene removal efficiency of the system. High ratio of UVRT to EBRT improved the removal efficiency, suggesting that the UV system has a greater effect on the overall performance of the system compared with the biofilter. Analysis of the capital and operating costs showed that the capital costs of the standalone biofilter system were much higher than those of the standalone UV system. However, the biofilter operating costs were lower than those of the UV system. The operating costs of the combined UV-biofilter system increased with increasing UVRT/EBRT ratio, whereas its capital costs decreased.

Keywords： volatile organic compounds     ultraviolet (UV) photodegradation     biofilter     modeling     cost analysis    

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Fluorescent probes and functional materials for biomedical applications

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 10,   Pages 1425-1437 doi: 10.1007/s11705-022-2163-1

Abstract: Here, we highlight examples of fluorescent probes and functional materials for biological applications

Keywords： fluorescent probes     imaging     cell     biomedicine     biomolecules    

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Fault evolution-test dependency modeling for mechanical systems

Xiao-dong TAN,Jian-lu LUO,Qing LI,Bing LU,Jing QIU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 10,   Pages 848-857 doi: 10.1631/FITEE.1500011

Abstract: Tracking the process of fault growth in mechanical systems using a range of tests is important to avoidIn this paper, to improve the testability performance of mechanical systems for tracking fault growthtrackability and predictability is developed to quantify the testability performance of mechanical systemstestability analysis method can provide guidance to engineers to improve the testability level of mechanical systems

Keywords： Mechanical systems     Design for testability (DFT)     Fault evolution-test dependency model (FETDM)    

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An integrated approach for machine-learning-based system identification of dynamical systems under control

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 237-250 doi: 10.1007/s11705-021-2058-6

Abstract: predictive control, can offer superior control of key process variables for multiple-input multiple-output systems

Keywords： nonlinear model predictive control     black-box modeling     continuous-time system identification     machine    

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Title Author Date Type Operation

Science-based Engineering R & D of Complex Systems

Xu Zhilei

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

Hydrologic experiments and modeling of two laboratory bioretention systems under different boundary conditions

Ruifen Liu, Elizabeth Fassman-Beck

Journal Article

Discrete-event stochastic systems with correlated inputs: Modeling and performance evaluation

Journal Article

Predictive Functional Control Based on Fuzzy Model for HVAC Systems

Lu Hongli,Jia Lei,Wang Lei,Gao Rui

Journal Article

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

Journal Article

DESIGNING DIVERSIFIED CROPPING SYSTEMS IN CHINA: THEORY, APPROACHES AND IMPLEMENTATION

Journal Article

Smart systems engineering contributing to an intelligent carbon-neutral future: opportunities, challenges

Journal Article

A Numerical Convex Lens for the State-Discretized Modeling and Simulation of Megawatt Power ElectronicsSystems as Generalized Hybrid Systems

Bochen Shi, Zhengming Zhao, Yicheng Zhu, Zhujun Yu, Jiahe Ju

Journal Article

Development and applications of functional gene microarrays in the analysis of the functional diversity

Zhili HE, Joy D. VAN NOSTRAND, Ye DENG, Jizhong ZHOU

Journal Article

DESIGNING DIVERSIFIED CROPPING SYSTEMS IN CHINA: THEORY, APPROACHES AND IMPLEMENTATION

Wen-Feng CONG, Chaochun ZHANG, Chunjie LI, Guangzhou WANG, Fusuo ZHANG

Journal Article

Effects of design parameters on performance and cost analysis of combined ultraviolet-biofilter systemstreating gaseous chlorobenzene based on mathematical modeling

Can WANG, Jinying XI, Hongying HU, Insun KANG

Journal Article

Fluorescent probes and functional materials for biomedical applications

Journal Article

Fault evolution-test dependency modeling for mechanical systems

Xiao-dong TAN,Jian-lu LUO,Qing LI,Bing LU,Jing QIU

Journal Article

An integrated approach for machine-learning-based system identification of dynamical systems under control

Journal Article