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Parasitic rotation evaluation and avoidance of 3-UPU parallel mechanism
Haibo QU, Yuefa FANG, Sheng GUO
《机械工程前沿(英文)》 2012年 第7卷 第2期 页码 210-218 doi: 10.1007/s11465-012-0317-4
Based on the prototype of 3-UPU (universal-prismatic-universal joint) parallel mechanism proposed by Tsai [ ], the parasitic rotation evaluation is performed and calculated the bound of instability of SNU Seoul National University 3-UPU parallel mechanism. Through analysis of the terminal constraint system of the 3-UPU parallel mechanism, the equation about the parasitic rotation and limited clearance is presented. Then the norm of possible parasitic rotation is employed to evaluate the mechanism stability with limited clearance. The higher this number the worst is the pose, the lower it is the best it is. And the contour atlas of parasitic rotation is obtained, which can be used for further analysis and design. With the practice experiment result of SUN 3-UPU parallel mechanism, we find it’s bound of instability, which indicates there will appear the parasitic rotation when the number exceeds the bound. Finally, the method for avoidance of possible parasitic motions is presented by adding redundantly actuated limbs.
关键词: parallel mechanism 3-UPU (universal-prismatic-universal joint) parasitic motions limited clearance redundantly actuated limbs
Tianxiang XIA, Xuehua LIU
《环境科学与工程前沿(英文)》 2011年 第5卷 第2期 页码 236-242 doi: 10.1007/s11783-010-0218-8
Fluid damping clearance in a control valve of injector
ZHANG Jianming, ZHANG Weigang, YANG Bing, WANG Yawei
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 439-441 doi: 10.1007/s11465-007-0075-x
null
《医学前沿(英文)》 2012年 第6卷 第3期 页码 332-337 doi: 10.1007/s11684-012-0212-8
Bedside limited echocardiography, or focused cardiac ultrasound, continues to gain popularity in many emergency rooms, intensive care units, and operating rooms as a rapid method of assessing unstable patients. Effective monitoring of cardiovascular function in conditions like cardiac arrest or near-arrest is the crucial step to guide successful resuscitative efforts. Transesophageal echocardiography (TEE) has emerged as one of the preferred cardiac diagnostic and monitoring modalities in the intraoperative setting due to the fact that it is less invasive than many other monitors, is immediately accessible, and allows for continuous real-time monitoring of cardiac function. However, the minimum training requirements needed for the anesthesia provider to obtain the competency, knowledge, and skills for basic certification in perioperative TEE far exceed those developed for other medical specialties. We believe there is an urgent need to develop (1) practical guidelines for emergent perioperative TEE use for anesthesiologists and (2) a requisite educational curriculum to teach the basic skills necessary to aid in the diagnosis and treatment of cardiac arrest or near-arrest scenarios. The measures elucidated in this report summarize the efforts of the Department of Anesthesiology at the University of Florida in establishing the necessary steps to make this process not only practical, but accessible to all trainees. We hope that these collective efforts will provide more trainees the confidence in utilizing TEE to aid in establishing a diagnosis in critical situations.
关键词: transesophageal echocardiography curriculum competency training hemodynamic instability
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
FENG Jinzhi, ZHENG Songlin, YU Fan
《机械工程前沿(英文)》 2008年 第3卷 第1期 页码 111-117 doi: 10.1007/s11465-008-0020-7
关键词: co-simulation technology exchange interface conventional bandwidth-limited algorithm
Measurement and analysis of tip clearance unsteady flow spectrum in axial-flow fan rotor
LIU Bo, HOU Weimin, MA Changyou, WANG Yangang, ZHOU Qiang
《能源前沿(英文)》 2008年 第2卷 第4期 页码 448-452 doi: 10.1007/s11708-008-0088-0
关键词: development endwall unsteady pressure pressure measurement experiment
Two-stage scheduling on batch and single machines with limited waiting time constraint
Zhongshun SHI, Zewen HUANG, Leyuan SHI
《工程管理前沿(英文)》 2017年 第4卷 第3期 页码 368-374 doi: 10.15302/J-FEM-2017034
null
《农业科学与工程前沿(英文)》 2019年 第6卷 第4期 页码 313-320 doi: 10.15302/J-FASE-2019282
Phosphate is supplied to agriculture by mining and fertilizer production, followed by different steps of phosphate utilization, including primary production, feed and food consumption, and conversion of biomass, with accumulation in soils, but little recycling and severe environmental losses. Phosphate is a limited essential nutrient, however, with very uneven distribution worldwide. Closing the cycle and reducing primary phosphate consumption are fundamental future challenges. Maize has a relatively high phosphate requirement. China and Germany together cover the whole range of maize production systems. The new Sino-German international research training group “Adaptation of Chinese and German maize-based food-feed-energy systems to limited phosphate resources” (AMAIZE-P) was initiated in 2018 as a joint venture of the China Agricultural University (Beijing, China) and the University of Hohenheim (Stuttgart, Germany). The interdisciplinary and complementary research is driven by the hypothesis that under phosphate limited conditions, high productivity and high phosphate use efficiency can be achieved simultaneously by adapting phosphate cycling and availability (sources) to the multipurpose phosphate demands (sinks) in maize-based food-feed-energy systems. The educational program for doctoral researchers in China and Germany includes joint block seminars, thematic field trips, case studies, methodological courses, doctoral researchers’ conferences, intercultural training sessions and personal training.
关键词: international research training group limited resources maize phosphate
Non-convex sparse optimization-based impact force identification with limited vibration measurements
《机械工程前沿(英文)》 2023年 第18卷 第3期 doi: 10.1007/s11465-023-0762-2
关键词: impact force identification inverse problem sparse regularization under-determined condition alternating direction method of multipliers
Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0731-1
关键词: aero-engine blade displacement response dynamic strain reconstruction mode shape strain gauge
Boa Jin, Hyunmin Park, Yang Liu, Leijing Liu, Jongdeok An, Wenjing Tian, Chan Im
《化学科学与工程前沿(英文)》 2021年 第15卷 第1期 页码 164-179 doi: 10.1007/s11705-020-1976-z
关键词: charge-carrier photogeneration transient photocurrent polymer solar cells charge-carrier extraction space charge-limited current
李英能
《中国工程科学》 2012年 第14卷 第3期 页码 41-45
以降水利用和灌溉程度为依据,对半旱地农业进行了研究,着重讨论了与半旱地农业涵义有关的问题,论述了在北方缺水地区发展半旱地农业的意义,给出了半旱地农业有限补灌技术模式。针对北方缺水地区的特点,提出了不同类型区半旱地农业有限补灌发展模式,并探讨了北方缺水地区半旱地农业发展有限补灌的策略。
Industrial Structure Adjustment of Shaanxi Province under the Limited Water Resources Condition
Xiao-jun Liu,Zhen-yu Guo,Chao Ding,Han-liang Fu
《工程管理前沿(英文)》 2014年 第1卷 第4期 页码 378-384 doi: 10.15302/J-FEM-2014057
关键词: water resources capacity of water resources industrial transformation multi-objective programming
标题 作者 时间 类型 操作
Parasitic rotation evaluation and avoidance of 3-UPU parallel mechanism
Haibo QU, Yuefa FANG, Sheng GUO
期刊论文
Copper and zinc interaction on water clearance and tissue metal distribution in the freshwater mussel
Tianxiang XIA, Xuehua LIU
期刊论文
Fluid damping clearance in a control valve of injector
ZHANG Jianming, ZHANG Weigang, YANG Bing, WANG Yawei
期刊论文
Emergent limited perioperative transesophageal echocardiography: should new guidelines exist for limited
null
期刊论文
Bandwidth-limited active suspension controller for an off-road vehicle based on co-simulation technology
FENG Jinzhi, ZHENG Songlin, YU Fan
期刊论文
Measurement and analysis of tip clearance unsteady flow spectrum in axial-flow fan rotor
LIU Bo, HOU Weimin, MA Changyou, WANG Yangang, ZHOU Qiang
期刊论文
Two-stage scheduling on batch and single machines with limited waiting time constraint
Zhongshun SHI, Zewen HUANG, Leyuan SHI
期刊论文
Adaptation of Chinese and German maize-based food-feed-energy systems to limited phosphate resources—a
null
期刊论文
Non-convex sparse optimization-based impact force identification with limited vibration measurements
期刊论文
Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses
期刊论文
dynamics of polymer solar cells probed by a transient photocurrent nearby the regime of the space charge-limited
Boa Jin, Hyunmin Park, Yang Liu, Leijing Liu, Jongdeok An, Wenjing Tian, Chan Im
期刊论文
Industrial Structure Adjustment of Shaanxi Province under the Limited Water Resources Condition
Xiao-jun Liu,Zhen-yu Guo,Chao Ding,Han-liang Fu
期刊论文