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LEVERAGING LIVESTOCK TO PROMOTE A CIRCULAR FOOD SYSTEM
Zhengxia DOU
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期 页码 188-192 doi: 10.15302/J-FASE-2020370
LEVERAGING LIVESTOCK TO PROMOTE A CIRCULAR FOOD SYSTEM
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期
Livestock provide multifaceted services to human societies worldwide. In developing countries, they are crucial assets and safety net for rural poor, and they provide nutrients-dense food to nourish people. In developed economies, growth in demand for animal-derived food is slowing while attention is growing over the role of livestock farming in an enhanced circular food system for sustainability. This analysis, focusing on the modern food systems in developed countries, aims to highlight the unique function of livestock that helps people re-harvest and upcycle crop and food residues generated along the food chain that are otherwise unfit for human consumption. First, human-unusable crop and food residue materials are described in three broad categories based on their characteristics and potential feeding attributes; the magnitude of biomass materials that are already used in routine animal feeding as well as residues that remain as underutilized resources are illustrated using the USA as an example. Then, the research and technology development critically needed for the future is discussed. As the world strives to produce more food with smaller environmental and climate footprints, upcycling the residual biomass via livestock for food production presents a viable pathway toward improved resource use, reduced pollution and enhanced food system efficiency.
金涌,冯之浚,陈定江
《中国工程科学》 2010年 第12卷 第1期 页码 4-11
我国从开始关注循环经济理念,到今天把循环经济定为国家发展的基本国策之一,已经历了十余个年头。从理论探索到工程实践,在多学科共同交叉研究中,许多专家学者提出了诸多基本理念。为了承上启下,笔者试图对这方面的创新思想进行总括,作为进一步以工程科技创新推进循环经济发展的指导思想。
China’s Agriculture Green Development: from Concept to Actions
《农业科学与工程前沿(英文)》 doi: 10.15302/J-FASE-2023512
● A target-threshold indicator evaluation system is proposed to measure China’s agriculture transformation.
关键词: agricultural transformation Agriculture Green Development historical trend indicator system theoretical conception
Frequencies of circular plate with concentric ring and elastic edge support
null
《机械工程前沿(英文)》 2014年 第9卷 第2期 页码 168-176 doi: 10.1007/s11465-014-0299-5
Exact solutions for the flexural vibrations of circular plates having elastic edge conditions along with rigid concentric ring support have been presented in this paper. Values of frequency parameter for the considered circular plate are computed for different sets of values of elastic rotational and translation restraints and the radius of internal rigid ring support. The results for the first three modes of plate vibrations are computed and are presented in tabular form. The effects of rotational and linear restraints and the radius of the rigid ring support on the vibration behavior of circular plates are studied over a wide range of non-dimensional parametric values. The values of the exact frequency parameter presented in this paper for varying values of restraint parameters and the radius of the rigid ring support can better serve in design and as benchmark solutions to validate the numerical methods obtained by using other methods of solution.
关键词: circular plate frequency elastic edge rigid ring mode switching
Policy options for Agriculture Green Development by farmers in China
Laurence E. D. SMITH
《农业科学与工程前沿(英文)》 2020年 第7卷 第1期 页码 90-97 doi: 10.15302/J-FASE-2019290
Farmers are the key agents who manage land and water. Agriculture Green Development (AGD) requires a transformation in farming from high resource consumption and environmental cost to sustainable intensification with high productivity, high resource use efficiency and low environmental risk. This paper analyzes the public policy challenge of AGD and makes the case for a location-sensitive policy mix made up of regulation, advice provision, voluntarism and targeted incentives. The public agricultural extension service in China is a key resource, but one that requires reorientation and reform with the aim of better balancing high farm productivity with environmental protection.
关键词: agriculture environment development incentives policy regulation
Numerical analysis of hydrodynamic process of circular-translational-moving polishing (CTMP)
ZHAI Wenjie, LIU Changxiong, LIANG Yingchun
《机械工程前沿(英文)》 2008年 第3卷 第4期 页码 441-448 doi: 10.1007/s11465-008-0074-6
关键词: numerical analysis practical CTMP circular-translational-moving polishing CTMP different
HIGHLIGHTS OF THE SPECIAL ISSUE “CARBON NEUTRALITY AND A LOW CARBON ECONOMY FOR AGRICULTURE”
《农业科学与工程前沿(英文)》 2023年 第10卷 第2期 页码 153-154 doi: 10.15302/J-FASE-2023497
A new method for boring of non-circular holes
ZHANG Kai, HU De-jin
《机械工程前沿(英文)》 2006年 第1卷 第4期 页码 456-460 doi: 10.1007/s11465-006-0058-3
关键词: electromagnetic actuation control method displacement flexible body revolving electromagnetic
Highlights of special issue on ‘Agriculture in Water-Limited Areas’
Pute WU
《农业科学与工程前沿(英文)》 2017年 第4卷 第2期 页码 123-125 doi: 10.15302/J-FASE-2017147
Lokavarapu Bhaskara Rao, Chellapilla Kameswara Rao
《机械工程前沿(英文)》 2013年 第8卷 第3期 页码 291-297 doi: 10.1007/s11465-013-0255-9
This work presents the existence of buckling mode switching with respect to the radius of concentric rigid ring support. The buckling mode may not be axisymmetric as previously assumed. In general, the plate may buckle in an axisymmetric mode but when the radius of the ring support becomes small, the plate may buckle in an asymmetric mode. The optimum radius of the concentric rigid ring support for maximum buckling load is also determined. Introducing internal rigid ring support, when placed at an optimal position increases the elastic buckling load capacity by 149.39 percent. The numerical results obtained are in good agreement with the previously published data.
关键词: buckling circular plate elastically restrained edge rigid ring support mode switching
Jinghua XU, Hongsheng SHENG, Shuyou ZHANG, Jianrong TAN, Jinlian DENG
《机械工程前沿(英文)》 2021年 第16卷 第1期 页码 133-150 doi: 10.1007/s11465-020-0610-6
关键词: surface accuracy optimization multiple circular holes additive manufacturing (AM) part build orientation triangular fuzzy number (TFN) digital twins
Zhifang ZHOU, Jinhao LIU, Huixiang ZENG, Mengmeng XU, Shihui LI
《工程管理前沿(英文)》 2022年 第9卷 第2期 页码 297-311 doi: 10.1007/s42524-020-0143-z
关键词: circular economy carbon performance comprehensive evaluation thermal power enterprise
WATER POLLUTION AND AGRICULTURE: MULTI-POLLUTANT PERSPECTIVES
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 639-647 doi: 10.15302/J-FASE-2023527
Agriculture is an important cause of multiple pollutants in water. With population growth and increasing food demand, more nutrients, plastics, pesticides, pathogens and antibiotics are expected to enter water systems in the 21st century. As a result, water science has been shifting from single-pollutant to multi-pollutant perspectives for large-scale water quality assessments. This perspective paper summarizes and discusses four main highlights related to water pollution and agriculture from the multi-pollutant perspective. These highlights reveal the spatial and temporal distribution and main sources of multiple pollutants in waters. Based on the highlights, a scientific agenda is proposed to prioritize solutions for sustainable agriculture (UN Sustainable Development Goal 2) and clean water (UN Sustainable Development Goals 6 and 14). This agenda points out that when formulating solutions for water pollution, it is essential to take into account multiple pollutants and their interactions beyond biogeochemistry.
关键词: water quality agriculture multi-pollutant assessment hotspots interactions
标题 作者 时间 类型 操作
Numerical analysis of hydrodynamic process of circular-translational-moving polishing (CTMP)
ZHAI Wenjie, LIU Changxiong, LIANG Yingchun
期刊论文
Fundamental buckling of circular plates with elastically restrained edges and resting on concentric rigid
Lokavarapu Bhaskara Rao, Chellapilla Kameswara Rao
期刊论文
Surface accuracy optimization of mechanical parts with multiple circular holes for additive manufacturing
Jinghua XU, Hongsheng SHENG, Shuyou ZHANG, Jianrong TAN, Jinlian DENG
期刊论文
Carbon performance evaluation model from the perspective of circular economy—The case of Chinese thermal
Zhifang ZHOU, Jinhao LIU, Huixiang ZENG, Mengmeng XU, Shihui LI
期刊论文