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REINTEGRATION OF CROP-LIVESTOCK SYSTEMS IN EUROPE: AN OVERVIEW

Antonius G. T. SCHUT, Emily C. COOLEDGE, Marc MORAINE, Gerrie W. J. VAN DE VEN, Davey L. JONES, David R. CHADWICK

《农业科学与工程前沿（英文）》 2021年 第8卷 第1期   页码 111-129 doi: 10.15302/J-FASE-2020373

摘要： Ongoing specialization of crop and livestock systems provides socioeconomic benefits to the farmer but has led to greater externalization of environmental costs when compared to mixed farming systems. Better integration of crop and livestock systems offers great potential to rebalance the economic and environmental trade-offs in both systems. The aims of this study were to analyze changes in farm structure and review and evaluate the potential for reintegrating specialized intensive crop and livestock systems, with specific emphasis on identifying the co-benefits and barriers to reintegration. Historically, animals were essential to recycle nutrients in the farming system but this became less important with the availability of synthetic fertilisers. Although mixed farm systems can be economically attractive, benefits of scale combined with socio-economic factors have resulted in on-farm and regional specialization with negative environmental impacts. Reintegration is therefore needed to reduce nutrient surpluses at farm, regional and national levels, and to improve soil quality in intensive cropping systems. Reintegration offers practical and cost-effective options to widen crop rotations and promotes the use of organic inputs and associated benefits, reducing dependency on synthetic fertilisers, biocides and manure processing costs. Circular agriculture goes beyond manure management and requires adaptation of both food production and consumption patterns, matching local capacity to produce with food demand. Consequently, feed transport, greenhouse gas emissions, nutrient surpluses and nutrient losses to the environment can be reduced. It is concluded that reintegration of specialized farms within a region can provide benefits to farmers but may also lead to further intensification of land use. New approaches within a food system context offer alternatives for reintegration, but require strong policy incentives which show clear, tangible and lasting benefits for farmers, the environment and the wider community.

关键词： circular agriculture     coupled farming systems     mixed farming     specialised farming systems     GHG    

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Effect of land-use management systems on coupled physical and mechanical, chemical and biological soil

Rainer HORN, Winfried E. H. BLUM

《农业科学与工程前沿（英文）》 2020年 第7卷 第3期   页码 243-245 doi: 10.15302/J-FASE-2020334

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种植业结构调整和草牧业发展潜力分析及政策建议

李向林,沈禹颖,万里强

《中国工程科学》 2016年 第18卷 第1期   页码 94-105 doi: 10.15302/J-SSCAE-2016.01.012

摘要：

发展农区草牧业可促进牧草与粮食作物或经济作物在时间、空间上的耦合，提高农业资源的利用效率。目前我国农区草业的资源优势尚未得到有效发挥，其发展仍然受传统农业生产模式思想的束缚，政策上对其发展的扶持力度也较小。本文分析了农区草业发展的现状与潜力，并提出了相关的政策建议。

关键词： 种植业结构调整     农区草业     潜力     政策建议    

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Reducing environmental impacts through socioeconomic transitions: critical review and prospects

《环境科学与工程前沿（英文）》 2023年 第17卷 第2期 doi: 10.1007/s11783-023-1624-1

摘要：

● Reducing environmental impacts through socioeconomic structural transitions.

关键词： Environmental pressures     Environmental impacts     Nexus     Supply chains     Trade     Coupled systems    

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Characterising populations living close to intensive farming and composting facilities in England

《环境科学与工程前沿（英文）》 2021年 第15卷 第3期 doi: 10.1007/s11783-020-1332-z

摘要：

• Bioaerosol emitted from farming and composting facilities may pose health risks.

关键词： Composting     Intensive farming     Bioaerosol     Population characteristics     Public health    

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LARGE-SCALE FARMING BENEFITS SOIL ACIDIFICATION ALLEVIATION THROUGH IMPROVED FIELD MANAGEMENT IN BANANA

《农业科学与工程前沿（英文）》 2023年 第10卷 第1期   页码 48-60 doi: 10.15302/J-FASE-2022475

摘要：

● Large farms had the highest average yield and the least yield variation.

关键词： plantations     land transfer     large-scale farming     nutrient management     soil acidification    

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Reducing the environmental footprint of food and farming with Agriculture Green Development

William J. DAVIES, Jianbo SHEN

《农业科学与工程前沿（英文）》 2020年 第7卷 第1期   页码 1-4 doi: 10.15302/J-FASE-2019311

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Mitigating nitrous oxide emissions from agricultural soils by precision management

Robert M. REES, Juliette MAIRE, Anna FLORENCE, Nicholas COWAN, Ute SKIBA, Tony van der WEERDEN, Xiaotang JU

《农业科学与工程前沿（英文）》 2020年 第7卷 第1期   页码 75-80 doi: 10.15302/J-FASE-2019294

摘要：

Nitrous oxide (N O) emissions make up a significant part of agricultural greenhouse gas emissions. There is an urgent need to identify new approaches to the mitigation of these emissions with emerging technology. In this short review four approaches to precision managements of agricultural systems are described based on examples of work being undertaken in the UK and New Zealand. They offer the opportunity for N O mitigation without any reduction in productivity. These approaches depend upon new sensor technology, modeling and spatial information with which to make management decisions and interventions that can both improve agricultural productivity and environmental protection.

关键词： decision support systems     mitigation     nitrous oxide     precision farming    

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高速列车耦合大系统动力学研究

张卫华

《中国工程科学》 2015年 第17卷 第4期   页码 42-52

摘要：

根据高速铁路结构和技术特点，把高速列车以及与之相关并影响其动力学性能的线路、气流、供电和接触网等耦合系统作为一个统一的大系统，通过建立高速列车、线路、弓网及供电等子系统动力学模型，以及轮轨、弓网、流固和机电等耦合关系模型，形成高速列车耦合大系统动力学模型。针对高速列车运行模拟要求，给出基于循环变量方法的列车动力学建模及计算方法、基于滑移模型的车线耦合计算方法、基于松弛因子的流固耦合计算方法，实现高速列车耦合大系统动力学仿真。

关键词： 高速铁路；高速列车；动力学；耦合关系；仿真计算    

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Evaluation of automated in-line precision dairy farming technology implementation in three dairy farms

Maria CARIA, Giuseppe TODDE, Antonio PAZZONA

《农业科学与工程前沿（英文）》 2019年 第6卷 第2期   页码 181-187 doi: 10.15302/J-FASE-2019252

摘要：

In recent decades, dairy farms have been exposed to wide variation in profit levels due to a considerable variability of milk price, and energy and feed costs. Consequently, it is necessary for the dairy industry to improve efficiency and productivity by adopting innovative technologies. The automated in-parlour milk analysis and separation is mainly useful to produce low or high quality milk and to monitor the animal health status. Milk with high levels of protein and fat contents may reduce the intensity of standardization during cheesemaking process, reducing production costs. The study aimed to evaluate the efficiency of real-time milk separation during milking and the performance of the milking machine after implementation of AfiMilk MCS. In addition, the economic aspects were assessed. The separation of milk required the existing milking parlors to be equipped with an additional milkline to allow channeling milk with low and high coagulation properties into two different cooling tanks. The results showed that the high coagulation milk fraction, compared to the bulk milk, increased in fat (from 18% to 43%) and protein (from 3% to 7%) concentration. The technology tested has given promising results showing reliability and efficiency in milk separation in real time with affordable implementation costs.

关键词： cheese yield     infrared analysis     milk quality     real-time measurement     sensor    

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当前我国灌区节水改造的问题与对策

孙雪涛

《中国工程科学》 2002年 第4卷 第9期   页码 24-30

摘要：

我国灌区的建设与管理中仍然存在着“重建轻管”、“重灌轻排”的现象，这是长期投入不合理和传统的管理体制所造成的。文章指出在进行大型灌区续建配套与节水改造的过程中，应以建设节水高效灌溉农业为目标，采取国家加大投资力度并调整投资分担比例，进行管理体制的改革，推广科学灌溉并提高用水效率等有力措施，以改变“重建轻管”、“重灌轻排”的现象，使我国灌溉农业得以可持续发展。

关键词： 灌溉     排水     盐碱化     农业     节水高效    

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Uncertainty assessment in hydro-mechanical-coupled analysis of saturated porous medium applying fuzzy

Farhoud KALATEH, Farideh HOSSEINEJAD

《结构与土木工程前沿（英文）》 2020年 第14卷 第2期   页码 387-410 doi: 10.1007/s11709-019-0601-z

摘要： The purpose of the present study was to develop a fuzzy finite element method, for uncertainty quantification of saturated soil properties on dynamic response of porous media, and also to discrete the coupled dynamic equations known as - hydro-mechanical equations. Input parameters included fuzzy numbers of Poisson’s ratio, Young’s modulus, and permeability coefficient as uncertain material of soil properties. Triangular membership functions were applied to obtain the intervals of input parameters in five membership grades, followed up by a minute examination of the effects of input parameters uncertainty on dynamic behavior of porous media. Calculations were for the optimized combinations of upper and lower bounds of input parameters to reveal soil response including displacement and pore water pressure via fuzzy numbers. Fuzzy analysis procedure was verified, and several numerical examples were analyzed by the developed method, including a dynamic analysis of elastic soil column and elastic foundation under ramp loading. Results indicated that the range of calculated displacements and pore pressure were dependent upon the number of fuzzy parameters and uncertainty of parameters within equations. Moreover, it was revealed that for the input variations looser sands were more sensitive than dense ones.

关键词： fuzzy finite element method     saturated soil     hydro-mechanical coupled equations     coupled analysis     uncertainty analysis    

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秦巴山脉农林畜药绿色循环发展战略研究

刘旭,梅旭荣,杨正礼,杨世琦

《中国工程科学》 2016年 第18卷 第5期   页码 24-30 doi: 10.15302/J-SSCAE-2016.05.004

摘要：

秦巴山脉农业发展面临的主要问题是农业发展与生态环境矛盾突出，农业生产方式转变难度大，农业资源的差异化和碎片化影响农业经营规模与布局，农产品特色品种多，但知名品牌少、深加工少、效益差，以及特色农产品销售渠道和平台薄弱等。本文基于秦巴山脉农林畜药发展目标与思路，提出了山地生态环境红线管理与环境质量提升、科教引领、特色农产品品牌打造、基于农牧良性循环的生态农业、林下特色经济、山地特色农产品加工与营销六大战略。

关键词： 秦巴山脉     农林畜药     绿色循环发展     战略    

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开展陆生与水产养殖动物营养感知研究的展望 Perspective

高宗宇, 刘成栋, 麦康森, 何艮

《工程（英文）》 2023年 第23卷 第4期   页码 112-117 doi: 10.1016/j.eng.2022.05.019

摘要：

饲料在动物生长和健康中扮演着重要的角色，然而决定饲料表现的内在机一直是一个所谓的“黑箱”。直到近年来，研究证明营养素能够作为信号分子被细胞和机体感知，并在调控基因表达和代谢活动中起着至关重要的作用。多条分别感知不同营养素的信号通路被发现，营养感知信号调节也已在临床医学中被广泛用于药物开发与疾病控制。然而，在陆生和水产养殖动物中，对主要营养素（蛋白质、糖脂等）的营养感知和代谢调控的研究仍处于起步阶段。因此，我们针对未来在动物营养学中开展营养感知研究可能的研究主题和应用场景提出设想和建议。

关键词： 营养感知     新陈代谢     陆上养殖动物     水产养殖     动物营养     精确营养    

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Thermal fluid-structure interaction and coupled thermal-stress analysis in a cable stayed bridge exposed

Nazim Abdul NARIMAN

《结构与土木工程前沿（英文）》 2018年 第12卷 第4期   页码 609-628 doi: 10.1007/s11709-018-0452-z

摘要： In this paper, thermal fluid structure-interaction (TFSI) and coupled thermal-stress analysis are utilized to identify the effects of transient and steady-state heat-transfer on the vortex induced vibration and fatigue of a segmental bridge deck due to fire incidents. Numerical simulations of TFSI models of the deck are dedicated to calculate the lift and drag forces in addition to determining the lock-in regions once using fluid-structure interaction (FSI) models and another using TFSI models. Vorticity and thermal convection fields of three fire scenarios are simulated and analyzed. Simiu and Scanlan benchmark is used to validate the TFSI models, where a good agreement was manifested between the two results. Extended finite element method (XFEM) is adopted to create 3D models of the cable stayed bridge to simulate the fatigue of the deck considering three fire scenarios. Choi and Shin benchmark is used to validate the damaged models of the deck in which a good coincide was seen between them. The results revealed that TFSI models and coupled thermal-stress models are significant in detecting earlier vortex induced vibration and lock-in regions in addition to predicting damages and fatigue of the deck due to fire incidents.

关键词： fire scenario     transient heat transfer     TFSI model     coupled thermal-stress     XFEM    

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标题 作者 时间 类型 操作

REINTEGRATION OF CROP-LIVESTOCK SYSTEMS IN EUROPE: AN OVERVIEW

Antonius G. T. SCHUT, Emily C. COOLEDGE, Marc MORAINE, Gerrie W. J. VAN DE VEN, Davey L. JONES, David R. CHADWICK

期刊论文

Effect of land-use management systems on coupled physical and mechanical, chemical and biological soil

Rainer HORN, Winfried E. H. BLUM

期刊论文

种植业结构调整和草牧业发展潜力分析及政策建议

李向林,沈禹颖,万里强

期刊论文

Reducing environmental impacts through socioeconomic transitions: critical review and prospects

期刊论文

Characterising populations living close to intensive farming and composting facilities in England

期刊论文

LARGE-SCALE FARMING BENEFITS SOIL ACIDIFICATION ALLEVIATION THROUGH IMPROVED FIELD MANAGEMENT IN BANANA

期刊论文

Reducing the environmental footprint of food and farming with Agriculture Green Development

William J. DAVIES, Jianbo SHEN

期刊论文

Mitigating nitrous oxide emissions from agricultural soils by precision management

Robert M. REES, Juliette MAIRE, Anna FLORENCE, Nicholas COWAN, Ute SKIBA, Tony van der WEERDEN, Xiaotang JU

期刊论文

高速列车耦合大系统动力学研究

张卫华

期刊论文

Evaluation of automated in-line precision dairy farming technology implementation in three dairy farms

Maria CARIA, Giuseppe TODDE, Antonio PAZZONA

期刊论文

当前我国灌区节水改造的问题与对策

孙雪涛

期刊论文

Uncertainty assessment in hydro-mechanical-coupled analysis of saturated porous medium applying fuzzy

Farhoud KALATEH, Farideh HOSSEINEJAD

期刊论文

秦巴山脉农林畜药绿色循环发展战略研究

刘旭,梅旭荣,杨正礼,杨世琦

期刊论文

开展陆生与水产养殖动物营养感知研究的展望

高宗宇, 刘成栋, 麦康森, 何艮

期刊论文

Thermal fluid-structure interaction and coupled thermal-stress analysis in a cable stayed bridge exposed

Nazim Abdul NARIMAN

期刊论文