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Huaqiang CHU, Mingyan GU, Huaichun ZHOU, Fengshan LIU
《能源前沿(英文)》 2014年 第8卷 第1期 页码 41-48 doi: 10.1007/s11708-013-0292-4
关键词: transimissity HITEMP HITRAN Planck mean absorption coefficients
Zhiwen LIU , Zhengqing CHEN , Gao LIU , Xinpeng SHAO ,
《结构与土木工程前沿(英文)》 2009年 第3卷 第3期 页码 292-298 doi: 10.1007/s11709-009-0048-8
关键词: twin decks aerodynamic interference effects aerostatic coefficients wind tunnel test
王渭源
《中国工程科学》 2001年 第3卷 第8期 页码 29-32
当前,工程师和科学家都对微牛和纳牛量级载荷静摩擦系数(以下简称微牛纳牛静摩擦系数)很感兴趣。但文献中至今没有详细讨论过微牛纳牛静摩擦系数与载荷的关系,而且发表的实验结果都不相互讨论。从微分静摩擦系数的定义出发,导出几种典型模型下微分静摩擦系数和表观静摩擦系数的表式,并据此广泛讨论这些文献中的实验结果。
ZHU Jiqin, YU Yanmei, CHEN Jian, FEI Weiyang
《化学科学与工程前沿(英文)》 2007年 第1卷 第2期 页码 190-194 doi: 10.1007/s11705-007-0035-3
关键词: cost-saving consistent coefficient measurement separating
Effect of friction coefficients on the dynamic response of gear systems
Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 397-405 doi: 10.1007/s11465-017-0415-4
The inevitable deterioration of the lubrication conditions in a gearbox in service can change the tribological properties of the meshing teeth. In turn, such changes can significantly affect the dynamic responses and running status of gear systems. This paper investigates such an effect by utilizing virtual prototype technology to model and simulate the dynamics of a wind turbine gearbox system. The change in the lubrication conditions is modeled by the changes in the friction coefficients, thereby indicating that poor lubrication causes not only increased frictional losses but also significant changes in the dynamic responses. These results are further demonstrated by the mean and root mean square values calculated by the simulated responses under different friction coefficients. In addition, the spectrum exhibits significant changes in the first, second, and third harmonics of the meshing components. The findings and simulation method of this study provide theoretical bases for the development of accurate diagnostic techniques.
关键词: dynamic response friction coefficient wind loads wind turbine gearbox
A job-insertion heuristic for minimizing the mean flowtime in dynamic flowshops
Guang GUO, Bo WU, Shuzi YANG
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 197-202 doi: 10.1007/s11465-011-0211-5
A new adaptive job-insertion based heuristic is presented to minimize the mean flowtime in a dynamic flowshop consisting of machines. Job orders arrive to the system randomly, and the job arrival or release dates are not known in advance. The heuristic is derived by inserting new jobs into the scheduled sequence as needed when the machine becomes free. Computation results indicate that the proposed heuristic performs 2.7%–10.8% better than the SPT dispatching rule, which is currently one of the most effective methods for minimizing the mean flowtime in dynamic flowshops.
关键词: scheduling dynamic flowshops flowtime heuristic mean flowtime
Sivasankari SUNDARAM,Jakka SARAT CHANDRA BABU
《能源前沿(英文)》 2015年 第9卷 第3期 页码 311-321 doi: 10.1007/s11708-015-0369-3
关键词: global horizontal irradiance (GHI) mean bias error root mean square error mean percentage error coefficient of regression Visual Basic 2010 Express
Nanostructured gold films exhibiting almost complete absorption of light at visible wavelengths
Hanbin Zheng, Christine Picard, Serge Ravaine
《化学科学与工程前沿(英文)》 2018年 第12卷 第2期 页码 247-251 doi: 10.1007/s11705-018-1710-2
关键词: nanostructuration light absorption coating gold electrodeposition anodization
Effect of light scattering on the performance of a direct absorption solar collector
Kwang Hyun WON, Bong Jae LEE
《能源前沿(英文)》 2018年 第12卷 第1期 页码 169-177 doi: 10.1007/s11708-018-0527-5
关键词: direct absorption solar collector plasmonic nanofluid light scattering
Jorge Alberto Rodriguez DURAN,Ronney Mancebo BOLOY,Rafael Raider LEONI
《机械工程前沿(英文)》 2015年 第10卷 第3期 页码 255-262 doi: 10.1007/s11465-015-0342-1
The well-known fatigue crack growth (FCG) curves are two-parameter dependents. The range of the stress intensity factor ?K and the load ratio R are the parameters normally used for describing these curves. For engineering purposes, the mathematical representation of these curves should be integrated between the initial and final crack sizes in order to obtain the safety factors for stresses and life. First of all, it is necessary to reduce the dependence of the FCG curves to only one parameter. ?K is almost always selected and, in these conditions, considered as the crack driving force. Using experimental data from literature, the present paper shows how to perform multiple regression analyses using the traditional Walker approach and the more recent unified approach. The correlations so obtained are graphically analyzed in three dimensions. Numerical examples of crack growth analysis for cracks growing under nominal stresses of constant amplitude in smooth and notched geometries are performed, assuming an identical material component as that of the available experimental data. The resulting curves of crack size versus number of cycles (a vs. N) are then compared. The two models give approximately the same (a vs. N) curves in both geometries. Differences between the behaviors of the (avs. N) curves in smooth and notched geometries are highlighted, and the reasons for these particular behaviors are discussed.
关键词: fatigue crack propagation modeling life prediction mean stress effects
Xiangyang YE,Liming LIU,Zeyu LI
《能源前沿(英文)》 2019年 第13卷 第1期 页码 185-192 doi: 10.1007/s11708-017-0452-z
关键词: solar absorption-subcooled compression hybrid dynamic simulation performance analysis
Observer design for induction motor: an approach based on the mean value theorem
Mohamed Yacine HAMMOUDI,Abdelkarim ALLAG,Mohamed BECHERIF,Mohamed BENBOUZID,Hamza ALLOUI
《能源前沿(英文)》 2014年 第8卷 第4期 页码 426-433 doi: 10.1007/s11708-014-0314-x
关键词: observer design differential mean value theorem (DMVT) sector nonlinearity transformation linear matrix inequalities (LMI) induction motor
Effect of fine solid particles on absorption rate of gaseous CO
LU Sumin, MA Youguang, SHEN Shuhua, ZHU Chunying
《化学科学与工程前沿(英文)》 2008年 第2卷 第4期 页码 368-372 doi: 10.1007/s11705-008-0067-3
Mean wind load induced incompatibility in nonlinear aeroelastic simulations of bridge spans
Zhitian ZHANG
《结构与土木工程前沿(英文)》 2019年 第13卷 第3期 页码 605-617 doi: 10.1007/s11709-018-0499-x
关键词: bridge aerodynamics nonlinear aeroelastic model Pseudo-steady mean wind loads
Improving retrieval precision of NO
Jinpeng YANG
《机械工程前沿(英文)》 2009年 第4卷 第1期 页码 92-96 doi: 10.1007/s11465-009-0001-5
关键词: absorption structure low-frequency structure absorption cross-section NO2 density
标题 作者 时间 类型 操作
Calculations of narrow-band transimissities and the Planck mean absorption coefficients of real gases
Huaqiang CHU, Mingyan GU, Huaichun ZHOU, Fengshan LIU
期刊论文
Experimental study of aerodynamic interference effects on aerostatic coefficients of twin deck bridges
Zhiwen LIU , Zhengqing CHEN , Gao LIU , Xinpeng SHAO ,
期刊论文
Measurement of activity coefficients at infinite dilution for hydrocarbons in imidazolium-based ionic
ZHU Jiqin, YU Yanmei, CHEN Jian, FEI Weiyang
期刊论文
Effect of friction coefficients on the dynamic response of gear systems
Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI
期刊论文
A job-insertion heuristic for minimizing the mean flowtime in dynamic flowshops
Guang GUO, Bo WU, Shuzi YANG
期刊论文
Theoretical prediction and validation of global horizontal solar irradiance for a tropical climate in India
Sivasankari SUNDARAM,Jakka SARAT CHANDRA BABU
期刊论文
Nanostructured gold films exhibiting almost complete absorption of light at visible wavelengths
Hanbin Zheng, Christine Picard, Serge Ravaine
期刊论文
Effect of light scattering on the performance of a direct absorption solar collector
Kwang Hyun WON, Bong Jae LEE
期刊论文
Some remarks on the engineering application of the fatigue crack growth approach under nonzero mean loads
Jorge Alberto Rodriguez DURAN,Ronney Mancebo BOLOY,Rafael Raider LEONI
期刊论文
Performance analysis of solar absorption-subcooled compression hybrid refrigeration system in subtropical
Xiangyang YE,Liming LIU,Zeyu LI
期刊论文
Observer design for induction motor: an approach based on the mean value theorem
Mohamed Yacine HAMMOUDI,Abdelkarim ALLAG,Mohamed BECHERIF,Mohamed BENBOUZID,Hamza ALLOUI
期刊论文
Effect of fine solid particles on absorption rate of gaseous CO
LU Sumin, MA Youguang, SHEN Shuhua, ZHU Chunying
期刊论文
Mean wind load induced incompatibility in nonlinear aeroelastic simulations of bridge spans
Zhitian ZHANG
期刊论文