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《机械工程前沿（英文）》 2023年 第18卷 第2期 doi: 10.1007/s11465-022-0735-x
关键词： electromechanical-hydraulic hybrid actuator (EMHA) integration transmission mechanisms power assistance energy efficiency working characteristics
Recent advances in electrochemical decontamination of perfluorinated compounds from water: a review
《环境科学与工程前沿（英文）》 2023年 第17卷 第2期 doi: 10.1007/s11783-023-1618-z
● Recent advances in the electrochemical decontamination of PFAS are reviewed.
关键词： Perfluorinated compounds Electrochemical approach Working mechanisms Impacting factor Coupled process
Jinghua XU, Tiantian WANG, Qianyong CHEN, Shuyou ZHANG, Jianrong TAN
《机械工程前沿（英文）》 2020年 第15卷 第1期 页码 24-42 doi: 10.1007/s11465-019-0558-6
关键词： performance design air separation unit (ASU) lumped parameter model (LPM) variable working conditions T–S fuzzy interval detection
Yuan BIAN, David LEMOINE, Thomas G. YEUNG, Nathalie BOSTEL
《工程管理前沿（英文）》 2020年 第7卷 第2期 页码 248-258 doi: 10.1007/s42524-019-0069-5
关键词： two-level ULS problem lot-sizing working capital requirement ZIO property infinite production capacity
Baochen WEI, Feng GAO
《机械工程前沿（英文）》 2012年 第7卷 第2期 页码 109-119 doi: 10.1007/s11465-012-0323-6
Working capacity refers to the velocity output and force output of a manipulator. It is usually be represented by output capacity space. In this paper, the method of Linear Programming and a geometric method are proposed to calculate working capacity spaces in different situations. With the consideration of gravity effect of every component, the output force capacity space of heavy duty manipulators is calculated. The results show that the effect of the gravity is a translation of the capacity space. This paper gives a method for the output capacity express especially for heavy duty manipulators. The output capacity space can be helpful to the driving parameters selection. With the consideration of the gravity effect of every component and the friction at the joints, the excavating force capacity space of the heavy-load excavating mechanism is calculated and is represented as a multi-dimensional polytope. The results show that the effect of the gravity and friction is to translational act on the capacity space.
关键词： working capacity multi-DOF manipulator capacity polytope excavating mechanism
Balasubramaniyan SARAVANAN, Surbhi SIKRI, K. S. SWARUP, D. P. KOTHARI
《能源前沿（英文）》 2013年 第7卷 第3期 页码 333-341 doi: 10.1007/s11708-013-0259-5
关键词： unit commitment (UC) deterministic stochastic dynamic programming (DP) optimization state diagram
Bin HU, Di WU, L.W. WANG, R.Z. WANG
《能源前沿（英文）》 2017年 第11卷 第4期 页码 493-502 doi: 10.1007/s11708-017-0510-6
关键词： multi-stage compression high temperature heat pump heat recovery exergy destruction R1234ze(Z) working fluid
FOOD SYSTEMS TRANSFORMATION: CONCEPTS, MECHANISMS AND PRACTICES
《农业科学与工程前沿（英文）》 2023年 第10卷 第1期 页码 1-3 doi: 10.15302/J-FASE-2023491
Gripping mechanisms in current wood harvesting machines
D. GOUBET, J. C. FAUROUX, G. GOGU
《机械工程前沿（英文）》 2013年 第8卷 第1期 页码 42-61 doi: 10.1007/s11465-013-0358-3
This paper focuses on the structural synthesis of gripping mechanisms used in the mechanization of the harvesting process. The importance of the gripping function in current devices like harvesting heads is underlined. This function is performed with several typical mechanisms which are listed and described in this article. This study distinguishes two kinds of planar gripping mechanisms mainly used in opening and closing the rollers: five concentric and two lateral ones. Both kinds have advantages and drawbacks. So a third kind of hybrid mechanism has been designed in order to orientate the axis of the rollers during gripping motion in order to combine concentric and lateral gripping advantages. Two planar and one spatial existing mechanisms are described. The last part of this paper presents a structural synthesis of such a spatial parallel mechanism by using the structural parameters and the general formulae established by the third author. Nine kinematic diagrams of spatial parallel mechanisms are provided.
关键词： structural synthesis parallel mechanisms gripping mechanisms wood harvesting harvesting head
Working Up Green, and Living Up Green
Ji-shan He
《工程管理前沿（英文）》 2014年 第1卷 第1期 页码 2-2 doi: 10.15302/J-FEM-2014002
Recent development on innovation design of reconfigurable mechanisms in China
Wuxiang ZHANG, Shengnan LU, Xilun DING
《机械工程前沿（英文）》 2019年 第14卷 第1期 页码 15-20 doi: 10.1007/s11465-018-0517-7
关键词： innovation design reconfigurable mechanisms metamorphic mechanisms origami-derived mechanisms development trends
ZHU Hehua, LIAO Shaoming, XU Qianwei, ZHENG Qizhen
《结构与土木工程前沿（英文）》 2008年 第2卷 第4期 页码 350-358 doi: 10.1007/s11709-008-0051-5
Performance of a bi-layer solar steam generation system working at a high-temperature of top surface
Jinxin ZHONG, Congliang HUANG
《能源前沿（英文）》 2023年 第17卷 第1期 页码 141-148 doi: 10.1007/s11708-021-0725-4
关键词： solar steam generation solar energy numerical method porous material
Jiajia Li,Peigang Yan,Guowen Zhou,Xingshuo Li,Qiang Li,Jinfu Liu,Daren Yu,
《工程（英文）》 doi: 10.1016/j.eng.2023.06.015
关键词： Compressed air energy storage CFPP–CAES combined cycle Thermodynamic performance Technical economics
CROP DIVERSITY AND SUSTAINABLE AGRICULTURE: MECHANISMS, DESIGNS AND APPLICATIONS
《农业科学与工程前沿（英文）》 2021年 第8卷 第3期 页码 359-361 doi: 10.15302/J-FASE -2021417
Intensive monoculture agriculture has contributed greatly to global food supply over many decades, but the excessive use of agricultural chemicals (fertilizers, herbicides and pesticides) and intensive cultivation systems has resulted in negative side effects, such as soil erosion, soil degradation, and non-point source pollution[1]. To many observers, agriculture looms as a major global threat to nature conservation and biodiversity. As noted in the Global Biodiversity Outlook 4[2], the drivers associated with food systems and agriculture account for around 70% and 50% of the projected losses by 2050 of terrestrial and freshwater biodiversity, respectively[3].
In addition, agricultural development and modernization of agriculture has led to a decline in the total number of plant species upon which humans depend for food[4]. Currently, fewer than 200 of some 6000 plant species grown for food contribute substantially to global food output, and only nine species account for 67% of total crop production[3]. The global crop diversity has declined in past decades.
Crop species diversity at a national scale was identified as one of the most important factors that stabilize grain production at a national level[5]. A group of long-term field experiments demonstrated that crop diversity also stabilizes temporal grain productivity at field level[6]. Therefore, maintaining crop diversity at both national and field levels is of considerable importance for food security at national and global scales.
Crop diversity includes temporal (crop rotation) and spatial diversity (e.g., intercropping, agroforestry, cultivar mixtures and cover crops) at field scale. Compared to intensive monocultures, diversified cropping systems provide additional options to support multiple ecosystem functions. For instance, crop diversity may increase above- and belowground biodiversity, improve yield stability, reduce pest and disease damage, reduce uses of chemicals, increase the efficiency of the use land, light water and nutrient resources, and enhance stress resilience in agricultural systems.
To highlight advances in research and use of crop diversity, from developing and developed countries, we have prepared this special issue on “Crop Diversity and Sustainable Agriculture” for Frontiers of Agricultural Sciences and Engineering, mainly focusing on intercropping.
Intercropping, growing at least two crops at the same time as a mixture, for example, in alternate rows or strips, is one effective pathway for increasing crop diversity at the field scale. Over recent decades, there have been substantial advances in terms of understanding of processes between intercropped species and applications in practice. There are 10 articles in this special issue including letters, opinions, review and research articles with contributions from Belgium, China, Denmark, France, Germany, Greece, Italy, the Netherlands, Spain, Switzerlands, UK, and Mexico etc.
The contributors are internationally-active scientists and agronomists contributing to intercropping research and extension. For example, Antoine Messean is coordinator of the EU H2020 Research project DiverIMPACTS “Diversification through rotation, intercropping, multiple cropping, promoted with actors and value chains towards sustainability”. Eric Justes is coordinator of the EU H2020 Research project ReMIX “Redesigning European cropping systems based on species mixtures”. Maria Finckh has worked on crop cultivar mixture and organic agriculture over many years. Henrik Hauggaard-Nielsen has outstanding expertise in intercropping research and applications, moving from detailed studies on species interactions in intercropping to working with farmers and other stakeholders to make intercropping work in practical farming. In addition to these established scientists, young scientists who have taken an interest in intercropping also contribute to the special issue, including Wen-Feng Cong, Yixiang Liu, Qi Wang, Hao Yang and others.
The first contribution to this special issue addresses how to design cropping systems to reach crop diversification, with Wen-Feng Cong and coworkers ( https://doi.org/10.15302/J-FASE-2021392) considering that it is necessary to optimize existing and/or design novel cropping systems based on farming practices and ecological principles, and to strengthen targeted ecosystem services to achieve identified objectives. In addition, the design should consider regional characteristics with the concurrent objectives of safe, nutritious food production and environmental protection.
The benefits of crop diversification have been demonstrated in many studies. Wen-Feng Cong and coworkers describe the benefits of crop diversification at three scales: field, farm, and landscape. Hao Yang and coauthors reviewed the multiple functions of intercropping. Intercropping enhances crop productivity and its stability, it promotes efficient use of resources and saves mineral fertilizer, controls pests and diseases of crops and reduces the use of pesticides. It mitigates climate change by sequestering carbon in soil, reduces non-point source pollution, and increases above- and belowground biodiversity of other taxa at field scale ( https://doi.org/10.15302/J-FASE-2021398).
Eric Justes and coworkers proposed the “4C” framework to help understand the role of species interactions in intercropping ( https://doi.org/10.15302/J-FASE-2021414). The four components are competition, complementary, cooperation (facilitation) and compensation, which work often simultaneously in intercropping. Hao Yang and coworkers used the concept of diversity effect from ecology to understand the contribution of complementarity and selection effects to enhanced productivity in intercropping. The complementarity effect consists of interspecific facilitation and niche differentiation between crop species, whereas the selection effect is mainly derived from competitive processes between species such that one species dominates the other ( https://doi.org/10.15302/J-FASE-2021398). Also, Luis Garcia-Barrios and Yanus A. Dechnik-Vazquez dissected the ecological concept of the complementarity and selection effects to develop a relative multicrop resistance index to analyze the relation between higher multicrop yield and land use efficiency and the different ecological causes of overyielding under two contrasting water stress regimes ( https://doi.org/10.15302/J-FASE-2021412).
Odette Denise Weedon and Maria Renate Finckh found that composite cross populations, with different disease susceptibilities of three winter wheat cultivars, were moderately resistant to brown rust and even to the newly emerged stripe rust races prevalent in Europe since 2011, but performance varied between standard and organic management contexts ( https://doi.org/10.15302/J-FASE-2021394).
Comparing the performance of intercrops and sole crops is critical to make a sound evaluation of the benefits of intercropping and assess interactions between species choice, intercrop design, intercrop management and factors related to the production situation and pedoclimatic context. Wopke van der Werf and coworkers review some of the metrics that could be used in the quantitative synthesis of literature data on intercropping ( https://doi.org/10.15302/J-FASE-2021413).
Interspecific interactions provide some of the advantages of intercropping, and can be divided into above- and belowground interactions. Aboveground interactions can include light and space competition, which is influenced by crop species traits. Root exudates are also important in interspecific interactions between intercropped or rotated species. Qi Wang and coworkers estimated the light interception of growth stage of maize-peanut intercropping and corresponding monocultures, and found that intercropping has higher light interception than monoculture, and increasing plant density did not further increase light interception of intercropping ( https://doi.org/10.15302/J-FASE-2021403). Yuxin Yang and coworkers reported that the root exudates of fennel (Foeniculum vulgare) can reduce infection of tobacco by Phytophthora nicotianae via inhibiting the motility and germination of the spores of the pathogen ( https://doi.org/10.15302/J-FASE-2021399).
Focusing on the application of intercropping, Wen-Feng Cong and coworkers formulated species recommendations for different regions of China for different crop diversity patterns and crop species combinations. These authors also suggested three steps for implementing crop diversification on the North China Plain. Although there are multiple benefits of crop diversification, its extension and application are hindered by various technical, organizational, and institutional barriers along value chains, especially in Europe. Based on the findings of the European Crop Diversification Cluster projects, Antoine Messéan and coworkers suggested that there needs to be more coordination and cooperation between agrifood system stakeholders, and establish multiactor networks, toward an agroecological transition of European agriculture ( https://doi.org/10.15302/J-FASE-2021406). In addition, Henrik Hauggaard-Nielsen and coworkers report the outcomes of a workshop for participatory research to overcome the barriers to enhanced coordination and networking between stakeholders ( https://doi.org/10.15302/J-FASE-2021416).
Intercropping, though highly effective in labor-intensive agriculture, may be difficult to implement in machine-intensive, large-scale modern agriculture because appropriate large equipment is not commercially available for planting and harvesting various crop mixtures grown with strip intercropping[6]. Thus, the appropriate machinery will need to be developed for further practical application in large-scale agriculture.
As the guest editors, we thank all the authors and reviewers for their great contributions to this special issue on “Crop Diversity and Sustainable Agriculture”. We also thank the FASE editorial team for their kind supports.
标题 作者 时间 类型 操作
characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission mechanisms
期刊论文
Recent advances in electrochemical decontamination of perfluorinated compounds from water: a review
期刊论文
Performance design of a cryogenic air separation unit for variable working conditions using the lumped
Jinghua XU, Tiantian WANG, Qianyong CHEN, Shuyou ZHANG, Jianrong TAN
期刊论文
Two-level uncapacitated lot-sizing problem considering the financing cost of working capital requirement
Yuan BIAN, David LEMOINE, Thomas G. YEUNG, Nathalie BOSTEL
期刊论文
A method to calculate working capacity space of multi-DOF manipulator and the application in excavating
Baochen WEI, Feng GAO
期刊论文
Unit commitment using dynamic programming–an exhaustive working of both classical and stochastic approach
Balasubramaniyan SARAVANAN, Surbhi SIKRI, K. S. SWARUP, D. P. KOTHARI
期刊论文
Exergy analysis of R1234ze(Z) as high temperature heat pump working fluid with multi-stage compression
Bin HU, Di WU, L.W. WANG, R.Z. WANG
期刊论文
Recent development on innovation design of reconfigurable mechanisms in China
Wuxiang ZHANG, Shengnan LU, Xilun DING
期刊论文
Experimental study on working parameters of earth pressure balance shield machine tunneling in soft ground
ZHU Hehua, LIAO Shaoming, XU Qianwei, ZHENG Qizhen
期刊论文
Performance of a bi-layer solar steam generation system working at a high-temperature of top surface
Jinxin ZHONG, Congliang HUANG
期刊论文
Characteristics Analysis of Integrated CAES and CFPP Trigeneration System Considering Working Conditions
Jiajia Li,Peigang Yan,Guowen Zhou,Xingshuo Li,Qiang Li,Jinfu Liu,Daren Yu,
期刊论文
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