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Real-time monitoring of brake shoe keys in freight cars
Rong ZOU,Zhen-ying XU,Jin-yang LI,Fu-qiang ZHOU
《信息与电子工程前沿(英文)》 2015年 第16卷 第3期 页码 191-204 doi: 10.1631/FITEE.1400305
关键词: Condition monitoring Feature expression Brake shoe key Machine vision
Harvesting biomechanical energy in the walking by shoe based on liquid metal magnetohydrodynamics
Dan DAI, Jing LIU, Yixin ZHOU
《能源前沿(英文)》 2012年 第6卷 第2期 页码 112-121 doi: 10.1007/s11708-012-0186-x
关键词: human energy harvesting liquid metal wearable magnetohydrodynamics generator parasitic power in shoe
Wear mechanism of disc-brake block material for new type of drilling rig
WANG Xinhua, WANG Simin, ZHANG Siwei, WANG Deguo
《机械工程前沿(英文)》 2008年 第3卷 第1期 页码 10-16 doi: 10.1007/s11465-008-0009-2
关键词: asbestos-free frictional Fracture cyclization friction disc-brake
Transient analysis of thermoelastic contact problem of disk brakes
Ali BELHOCINE, Mostefa BOUCHETARA
《机械工程前沿(英文)》 2013年 第8卷 第2期 页码 150-159 doi: 10.1007/s11465-013-0266-6
The main purpose of this study is to analyze the thermomechanical behavior of the dry contact between the brake disk and pads during the braking phase. The simulation strategy is based on computer code ANSYS11. The modeling of transient temperature in the disk is actually used to identify the factor of geometric design of the disk to install the ventilation system in vehicles. The thermal-structural analysis is then used with coupling to determine the deformation established and the Von Mises stresses in the disk, the contact pressure distribution in pads. The results are satisfactory compared to those found in the literature.
关键词: brake disks heat flux heat-transfer coefficient Von Mises stress contact pressure
Three-dimensional electromagnetic analysis and design of permanent magnet retarder
Lezhi YE, Desheng LI, Bingfeng JIAO
《机械工程前沿(英文)》 2010年 第5卷 第4期 页码 438-441 doi: 10.1007/s11465-010-0111-0
关键词: auxiliary brake permanent magnet retarder water-cooling finite element method
Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine
K. RAJKUMAR, P. GOVINDARAJAN
《能源前沿(英文)》 2011年 第5卷 第4期 页码 398-403 doi: 10.1007/s11708-011-0157-7
关键词: oxygen enriched combustion exhaust gas temperature brake power (BP) specific fuel consumption (SFC)
NEW ZEALAND DAIRY FARM SYSTEMS AND KEY ENVIRONMENTAL EFFECTS
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期
• NZ dairy farming systems are based on year-round grazing of perennial pasture (ryegrass/white clover).
• Milk production per hectare has increased by about 29% with increased use of externally-sourced feeds over the last two decades.
• Externally-sourced feeds with a low protein concentration can potentially reduce N2O emissions and N leaching per unit of production.
• Systems analysis is important for evaluating mitigations to minimize trade-offs between environmental impacts.
This paper provides an overview of the range of dairy pasture grazing systems used in New Zealand (NZ), the changes with increased inputs over time and associated key environmental effects including nitrogen (N) leaching and greenhouse gas (GHG) emissions. NZ dairy farming systems are based on year-round grazing and seasonal milk production on perennial ryegrass/clover pasture where cows are rotationally grazed in paddocks. There was an increase in stocking rate on NZ dairy farms from 2.62 cows ha−1 in 2000/2001 to 2.84 cows ha−1 in 2015/2016. During the same period annual milk solids production increased from 315 to 378 kg·yr−1 per cow. This performance has coincided with an increase in N fertilizer use (by ~ 30%) and a twofold increase in externally-sourced feeds. Externally-sourced feeds with a low protein concentration (e.g., maize silage) can increase the efficiency of N utilization and potentially reduce N losses per unit of production. Off-paddock facilities (such as standoff or feed pads) are often used to restrict grazing during very wet winter conditions. A systems analysis of contrasting dairy farms in Waikato (largest NZ dairying region) indicates that the increased input would result in an increase in per-cow milk production but little change in efficiency of milk production from a total land use perspective. This analysis also shows that the increased inputs caused an 11% decrease in N footprint (i.e., N emissions per unit of milk production) and a 2% increase in C footprint (i.e., greenhouse gas (GHG) emissions per unit of milk production).jiafa.luo@agresearch.co.nz
Bioaerosol: A Key Vessel between Environment and Health
《环境科学与工程前沿(英文)》 2021年 第15卷 第3期 doi: 10.1007/s11783-021-1422-6
Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen
R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN
《能源前沿(英文)》 2015年 第9卷 第4期 页码 486-494 doi: 10.1007/s11708-015-0368-4
关键词: hydrogen brake thermal efficiency crank angle compressed ignition (CI)
Firm Innovation Systems: Perspectives of Researches on State-owned Key Enterprises
Jin Chen,Shu-fang Huang,Qing-rui Xu
《工程管理前沿(英文)》 2015年 第2卷 第1期 页码 64-70 doi: 10.15302/J-FEM-2015017
关键词: firm innovation system state-owned key enterprises ecology evolution
Pilot plants of membrane technology in industry: Challenges and key learnings
Colin A. Scholes
《化学科学与工程前沿(英文)》 2020年 第14卷 第3期 页码 305-316 doi: 10.1007/s11705-019-1860-x
关键词: membrane gas separation membrane contactors carbon capture pilot plants key learnings
China Keeps Carrying Forward the Key Special Project of “Air Pollution Causes and Control”
Huan Liu,Kebin He
《环境科学与工程前沿(英文)》 2016年 第10卷 第5期 doi: 10.1007/s11783-016-0881-7
杨志强
《工程(英文)》 2017年 第3卷 第4期 页码 559-566 doi: 10.1016/J.ENG.2017.04.021
为了掌握金川镍矿床的深部资源特征和地质状况,对困难的开采条件进行了系统分析,包括高应力、碎裂矿岩体、普遍的围岩变形、困难的巷道支护、复杂的岩体力学特征以及低采矿回收率等。为深部、大型和复杂镍钴矿山的安全、高效和连续开采建立了一个集成技术包,其由蜂窝式进路大面积连续采矿方法的发明、地压控制理论以及高应力和碎裂矿岩体技术模块的建立、新型充填胶凝材料的开发、粗骨料高浓度料浆管道输送的深井充填技术等组成。由此,所存在的难题得到了较好的解决,从而确保了金川镍矿床深部资源的高效开采和综合利用。同时,为高应力、碎裂和流变岩体的地下矿山使用下向胶结充填采矿方法展示了一个技术范例。
关键词: 深部开采 高效开发 综合利用 Key technology
NEW ZEALAND DAIRY FARM SYSTEMS AND KEY ENVIRONMENTAL EFFECTS
Jiafa LUO, Stewart LEDGARD
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期 页码 148-158 doi: 10.15302/J-FASE-2020372
关键词: dairy farms environmental impacts grazing systems intensification mitigation
《环境科学与工程前沿(英文)》 2023年 第17卷 第8期 doi: 10.1007/s11783-023-1703-3
● The availability of PD-anammox was investigated with higher NO3––N concentration.
关键词: PD-anammox process Nitrite accumulation COD Microbial interaction
标题 作者 时间 类型 操作
Real-time monitoring of brake shoe keys in freight cars
Rong ZOU,Zhen-ying XU,Jin-yang LI,Fu-qiang ZHOU
期刊论文
Harvesting biomechanical energy in the walking by shoe based on liquid metal magnetohydrodynamics
Dan DAI, Jing LIU, Yixin ZHOU
期刊论文
Wear mechanism of disc-brake block material for new type of drilling rig
WANG Xinhua, WANG Simin, ZHANG Siwei, WANG Deguo
期刊论文
Transient analysis of thermoelastic contact problem of disk brakes
Ali BELHOCINE, Mostefa BOUCHETARA
期刊论文
Three-dimensional electromagnetic analysis and design of permanent magnet retarder
Lezhi YE, Desheng LI, Bingfeng JIAO
期刊论文
Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine
K. RAJKUMAR, P. GOVINDARAJAN
期刊论文
Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen
R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN
期刊论文
Firm Innovation Systems: Perspectives of Researches on State-owned Key Enterprises
Jin Chen,Shu-fang Huang,Qing-rui Xu
期刊论文
China Keeps Carrying Forward the Key Special Project of “Air Pollution Causes and Control”
Huan Liu,Kebin He
期刊论文