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Induction motors variable speed drives diagnosis through rotor resistance monitoring
K. YAHIA, S. ZOUZOU, F. BENCHABANE
《能源前沿(英文)》 2012年 第6卷 第4期 页码 420-426 doi: 10.1007/s11708-012-0192-z
关键词: induction motor vector control broken rotor bars (BRBs) diagnostic extended Kalman filter (EKF)
Abderrahim ALLAL,Boukhemis CHETATE
《能源前沿(英文)》 2016年 第10卷 第2期 页码 176-191 doi: 10.1007/s11708-015-0386-2
关键词: induction motor incipient broken bar extended Park’s vector approach spectral analysis inter-turn short-circuit Hilbert transform
Mohammed FARUQI, Oved I. MATA, Francisco AGUINIGA
《结构与土木工程前沿(英文)》 2018年 第12卷 第3期 页码 352-360 doi: 10.1007/s11709-017-0453-3
Concrete members historically have used either pre-stressed steel or steel bars. In recent years there has been an increased interest in the use of fiber reinforced polymer (FRP) materials. However, the flexure behavior of a hybrid system reinforced by the combination of pre-stressed steel and glass fiber reinforced (GFRP) is still relatively unknown. The purpose of this work is to study this. Two slabs of 100 and 150-millimeter thickness, with a span of 2.1 m reinforced with both pre-stressing steel and GFRP were constructed and tested to failure using ACI 318-11 and ACI 440.1R-15. The concrete had strength of 31 MPa and the slabs were respectively reinforced with 5#4 bars and 3#5 bars. Each slab had 37.41 mm2 prestressing wire with a failure stress of 1722.5 MPa. The experimental flexural strength and deflection of slabs were compared with their respective sizes theoretical slabs. The theoretical slabs were either reinforced with pre-stressed steel or GFRP rebars, or a hybrid system. It was found that the hybrid system produces better results.
Hehua ZHU, Qianwei XU, Wenqi DING, Feng HUANG
《结构与土木工程前沿(英文)》 2011年 第5卷 第2期 页码 208-224 doi: 10.1007/s11709-011-0111-0
关键词: progressive failure weak-broken rock slope model test bolt
Performance of a novel bent-up bars system not interacting with concrete
Aydin SHISHEGARAN, Mohammad Reza GHASEMI, Hesam VARAEE
《结构与土木工程前沿(英文)》 2019年 第13卷 第6期 页码 1301-1315 doi: 10.1007/s11709-019-0552-4
关键词: bending capacity rubber tube stress transfer bent-up bars ductility cracking
Venkadesan ARUNACHALAM,Himavathi SRINIVASAN,A. MUTHURAMALINGAM
《能源前沿(英文)》 2016年 第10卷 第4期 页码 382-392 doi: 10.1007/s11708-016-0421-y
《医学前沿(英文)》 2022年 第16卷 第5期 页码 723-735 doi: 10.1007/s11684-021-0905-y
关键词: amyotrophic lateral sclerosis coronin-1a autophagy pathogenesis
Obesity in China: its characteristics, diagnostic criteria, and implications
null
《医学前沿(英文)》 2015年 第9卷 第2期 页码 129-133 doi: 10.1007/s11684-015-0387-x
Stability and dynamics of rotor system with 45° slant crack on shaft
Yanli LIN, Xiaohui SI, Fulei CHU
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 203-213 doi: 10.1007/s11465-011-0131-4
Crack on a shaft is one of the common damages in a rotor system. In this paper, transverse vibrations are calculated to compare the influences of transverse crack and slant crack on the rotor system. Results show that the vibration amplitude of the rotor system with a 45° slant crack on the shaft is larger than that with a transverse crack when the two types of crack have the same depth and the rotor system runs in the same condition. Stability and dynamic characteristics of the rotor system with a 45° slant crack on the shaft under torsional excitation are analyzed by considering opening and closing of the crack. It is shown that the instability of the transverse vibration of the rotor system increases with increasing difference between the bending stiffness in two main directions, and the vibration is stable when the two bending stiffness are identical. The spectrum analysis of the steady-state response reveals that the gravity and the eccentricity produce different frequency components, and when the two bending stiffness are identical, the multiple frequency components of the torsional excitation disappear. Further investigation shows that the vibration amplitudes in combined frequencies increase rapidly in transversal, torsional, and axial vibration with increasing slant crack depth. The results are helpful for the understanding the dynamic behavior of a rotor system with a slant crack on a shaft and can be used for the detection of the slant crack on a shaft.
关键词: rotor dynamics slant crack stability torsional excitation open and close
Study on wave rotor refrigerators
Yuqiang DAI, Dapeng HU, Meixia DING
《化学科学与工程前沿(英文)》 2009年 第3卷 第1期 页码 83-87 doi: 10.1007/s11705-009-0075-y
关键词: wave rotor refrigeration unsteady flow theory wave diagram
Souzana P. TASTANI,Maria S. KONSTA-GDOUTOS,Stavroula J. PANTAZOPOULOU,Victor BALOPOULOS
《结构与土木工程前沿(英文)》 2016年 第10卷 第2期 页码 214-223 doi: 10.1007/s11709-016-0332-3
关键词: carbon nanotubes strain resilient cementitious composite polypropylene fibers tensile bending bond
Optimization model for rotor blades of horizontal axis wind turbines
LIU Xiong, CHEN Yan, YE Zhiquan
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 483-488 doi: 10.1007/s11465-007-0084-9
关键词: population extended algorithm developed optimization accurate
The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV
Yongjun ZHENG, Shenghui YANG, Xingxing LIU, Jie WANG, Tomas NORTON, Jian CHEN, Yu TAN
《农业科学与工程前沿(英文)》 2018年 第5卷 第2期 页码 159-167 doi: 10.15302/J-FASE-2018216
关键词: CFD simulation downwash flow field numerical analysis plant protection six-rotor UAV
Jinyuan SHI,Zhicheng DENG,Yong WANG,Yu YANG
《能源前沿(英文)》 2016年 第10卷 第1期 页码 88-104 doi: 10.1007/s11708-015-0387-1
关键词: 700°C ultra-super-critical unit steam turbine very high pressure rotor structure strength design strength design criteria finite element analysis
标题 作者 时间 类型 操作
Induction motors variable speed drives diagnosis through rotor resistance monitoring
K. YAHIA, S. ZOUZOU, F. BENCHABANE
期刊论文
A new and best approach for early detection of rotor and stator faults in induction motors coupled to
Abderrahim ALLAL,Boukhemis CHETATE
期刊论文
Hybrid flexural components: Testing pre-stressed steel and GFRP bars together as reinforcement for flexural
Mohammed FARUQI, Oved I. MATA, Francisco AGUINIGA
期刊论文
Experimental study on the progressive failure and its anchoring effect of weak-broken rock vertical slope
Hehua ZHU, Qianwei XU, Wenqi DING, Feng HUANG
期刊论文
Performance of a novel bent-up bars system not interacting with concrete
Aydin SHISHEGARAN, Mohammad Reza GHASEMI, Hesam VARAEE
期刊论文
A novel NN based rotor flux MRAS to overcome low speed problems for rotor resistance estimation in vector
Venkadesan ARUNACHALAM,Himavathi SRINIVASAN,A. MUTHURAMALINGAM
期刊论文
Increased expression of coronin-1a in amyotrophic lateral sclerosis: a potential diagnostic biomarker
期刊论文
Stability and dynamics of rotor system with 45° slant crack on shaft
Yanli LIN, Xiaohui SI, Fulei CHU
期刊论文
The effect of carbon nanotubes and polypropylene fibers on bond of reinforcing bars in strain resilient
Souzana P. TASTANI,Maria S. KONSTA-GDOUTOS,Stavroula J. PANTAZOPOULOU,Victor BALOPOULOS
期刊论文
Optimization model for rotor blades of horizontal axis wind turbines
LIU Xiong, CHEN Yan, YE Zhiquan
期刊论文
The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV
Yongjun ZHENG, Shenghui YANG, Xingxing LIU, Jie WANG, Tomas NORTON, Jian CHEN, Yu TAN
期刊论文