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TRADE-OFFS IN THE DESIGN OF SUSTAINABLE CROPPING SYSTEMS AT A REGIONAL LEVEL: A CASE STUDY ON THE NORTH

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 2, Pages 295-308 doi: 10.15302/J-FASE-2021434

Abstract: how 30 different crop rotations practiced in the North China Plain could be combined at the regional levelto overcome trade-offs between indicators of economic, food security, and environmental performance.was concluded that a holistic analysis of the potential of a diversity cropping systems at a regional level

Keywords： crop rotation / food security / multi-objective optimization / water use

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Blockchain applied to the construction supply chain: A case study with threat model

Gjorgji SHEMOV, Borja GARCIA de SOTO, Hoda ALKHZAIMI

Frontiers of Engineering Management 2020, Volume 7, Issue 4, Pages 564-577 doi: 10.1007/s42524-020-0129-x

Abstract: This challenge creates a high level of rigidity in terms of processing shared information related toeffect of applying blockchain platforms on a case study is presented and analyzed from performance and securitylevel.paper, is a viable solution to the challenges in the CSC regardless of the risks associated with the security

Keywords： blockchain taxonomy construction supply chain literature review threat model analysis security level

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Assessment Method of Industrial System Maturity Levels

Wang Liheng, Zhou Zhicheng, Wang Kunsheng, Lu Chunhua, Wang Hainan, Cui Jian, Ma Xuemei

Strategic Study of CAE 2020, Volume 22, Issue 2, Pages 91-97 doi: 10.15302/J-SSCAE-2020.02.013

Abstract:

This paper proposes the concept of industrial system maturity level,and introduces a new factor, namely, industry security and controllability level (ISCL), which further

Keywords： industrial system maturity level strategic emerging industries assessment method industry security andcontrollability level (ISCL)

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Soil security and global food security

Frontiers of Agricultural Science and Engineering doi: 10.15302/J-FASE-2023530

Abstract:

● Much of the world’s agricultural land has been degraded through soil loss and degradation of soil organic matter.

Keywords： Agriculture soil security food security regenerative

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Water Security in Beijing‒Tianjin‒Hebei Region: Challenges and Strategies

Zhao Yong , Wang Qingming , Wang Hao , He Fan , Li Haihong , Zhai Jiaqi , Liu Rong , Hu Peng , Wang Jing

Strategic Study of CAE 2022, Volume 24, Issue 5, Pages 8-18 doi: 10.15302/J-SSCAE-2022.07.001

Abstract: For future development, it is necessary to analyze the water security risks and propose targeted countermeasuresIn addition, we analyze the water security status and relevant major scientific issues.contradiction between supply and demand of water resources is the primary problem that threatens water securityTherefore, to guarantee the security of the regional water system, 3.9‒6 billion m³ of waterneeds to strengthen the routine‒emergency integrated management and prepare countermeasures for over-level

Keywords： Beijing‒Tianjin‒Hebei region water security efficient utilization of water resources groundwater level

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A Study on Regional Assessment of Risk of Urban Major Hazard

Weng Tao,Zhu Jiping,Ma Minggeng,Liao Guangxuan,Wu zongzhi

Strategic Study of CAE 2006, Volume 8, Issue 9, Pages 80-84

Abstract: Principle of “level-superposed” of the grade of security is brought forward.Analyzing the possibility of all kinds of calamities to take place, confirming the grade of securityand superposing its coefficient correlation in certain proportion, this paper gets the synthetical securitycan offer reference for relevant research work, which is also significant to improve the engineering level

Keywords： major hazards assessment of risk level-superposed grade of security GIS

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Simulation of heterogeneous two-phase media using random fields and level sets

George STEFANOU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2, Pages 114-120 doi: 10.1007/s11709-014-0267-5

Abstract: critical examination of existing random field models of heterogeneous two-phase media with emphasis on level-cutThe case of random level sets, often used to represent the geometry of physical systems, is also examined

Keywords： microstructure random fields level sets shape recovery two-phase media

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Protein security and food security in China

Zheng RUAN,Shumei MI,Yan ZHOU,Zeyuan DENG,Xiangfeng KONG,Tiejun LI,Yulong YIN

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 2, Pages 144-151 doi: 10.15302/J-FASE-2015062

Abstract: Food security, the need to meet nutritional requirements, and four main problems for food protein securityresidents’ nutritional requirements and balanced dietary patterns, the conclusion is that food securityin China is in essence dependent on protein production and security of supply and that fat and carbohydratespolicy suggestions are made, which could ensure a balanced supply and demand for food protein and food security

Keywords： food security protein security nutrition dietary pattern

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The effect of sea level rise on beach morphology of caspian sea coast

M. A. Lashteh NESHAEI, F. GHANBARPOUR

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4, Pages 369-379 doi: 10.1007/s11709-017-0398-6

Abstract: Bed level elevations are measured and compared with the theoretical equilibrium profile.In the next stage, following extensive investigations, the bed level changes due to arise in sea levelThe mechanism of beach re-treatment due to a rise in sea level is considered based on the simplifiedComparison of the equilibrium profiles for different cases of sea level rise, clearly shows that becauseof the sediment transport induced by the fluctuation of the water level, the beach profile in the surf

Keywords： wave coastal zone beach morphology evolution equilibrium profile sea level rise

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Level set band method: A combination of density-based and level set methods for the topology optimization

Peng WEI, Wenwen WANG, Yang YANG, Michael Yu WANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3, Pages 390-405 doi: 10.1007/s11465-020-0588-0

Abstract: The level set method (LSM), which is transplanted from the computer graphics field, has been successfullyIn this study, a level set band method is proposed to overcome this drawback in handling topology changesin the level set framework.improve the continuity of objective and constraint functions by incorporating one parameter, namely, levelThe proposed method demonstrates a flexible topology change by applying a certain size of the level set

Keywords： level set method topology optimization density-based method level set band

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Research on the key technology of level pre-assembly of steel tower segments

Zhang Yongli,Gu Bifeng

Strategic Study of CAE 2010, Volume 12, Issue 4, Pages 48-52

Abstract:

In this paper, we researched the key technology of the level pre-assemblyLevel pre-assembly of steel tower fills the technology gaps in China and provides a strong basis for

Keywords： steel tower level pre-assembly support control apply level force

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Two-level uncapacitated lot-sizing problem considering the financing cost of working capital requirement

Yuan BIAN, David LEMOINE, Thomas G. YEUNG, Nathalie BOSTEL

Frontiers of Engineering Management 2020, Volume 7, Issue 2, Pages 248-258 doi: 10.1007/s42524-019-0069-5

Abstract: However, in literatures related to lot-sizing problem, WCR has only been studied in the single-levelIn this paper, we initially adopt WCR model for a multi-level case.A two-level (supplier–customer) model is established on the basis of the classic multi-level lot-sizingTo tackle this problem, we propose sequential and centralized approaches to solve the two-level case

Keywords： two-level ULS problem lot-sizing working capital requirement ZIO property infinite production capacity

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Understanding the demand predictability of bike share systems: A station-level analysis

Frontiers of Engineering Management Pages 551-565 doi: 10.1007/s42524-023-0279-8

Abstract: Divvy bike-share one-year data from Chicago, USA, we measured demand entropy and quantified the station-levelLastly, we identified that key factors contributing to station-level entropy and predictability includeBSS demand prediction, which can help decision makers and system operators anticipate diverse station-level

Keywords： bike share systems demand prediction prediction errors machine learning entropy

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Conceptual design of compliant mechanisms using level set method

Shi-kui CHEN, Michael Yu WANG

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 2, Pages 131-145 doi: 10.1007/s11465-006-0018-y

Abstract: We propose a level set method-based framework for the conceptual design of compliant mechanisms.The geometric shape of the compliant mechanism is represented as the zero level set of a one-higher dimensionallevel set function, and the dynamic variations of the shape are governed by the Hamilton-Jacobi partialThe application of level set methods endows the optimization process with the particular quality that

Keywords： splitting minimum dimensional optimization Hamilton-Jacobi topological

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System engineering for water pollution control at the watershed level in China

Wei MENG,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 4, Pages 443-452 doi: 10.1007/s11783-009-0037-0

Abstract: The present water pollution situation at watershed level in China has been systematically analyzed.The problems of water pollution control at watershed level include a lack of thought and approach, developmentalThe strategies of this project include establishing a water pollution control system at watershed level

Keywords： water pollution control watershed system engineering sustainability integrated watershed management key specific project of science and technology