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Mathematical model and manufacture programming of loxodromic-type normal circular-arc spiral bevel gear

Zhenyun DUAN, Houjun CHEN, Zhilan JU, Jian LIU

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 3,   Pages 312-321 doi: 10.1007/s11465-012-0308-5

Abstract:

In this paper, loxodromic-type normal circular-arc spiral bevel gear is proposed as a novel applicationof the circular-arc tooth profile at the gear transmission with intersecting axes.investigated, and the obtained results primarily reflect the superior performance of the proposed novel gear

Keywords： loxodrome     circular-arc tooth profile     Wildhaber-Novikov (W-N) gear     spiral bevel gear    

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Effect of fly ash and slag on concrete: Properties and emission analyses

Vivian W. Y. TAM, Khoa N. LE, Ana Catarina Jorge EVANGELISTA, Anthony BUTERA, Cuong N. N.

Frontiers of Engineering Management 2019, Volume 6, Issue 3,   Pages 395-405 doi: 10.1007/s42524-019-0019-2

Abstract: Recycled concrete is a material with the potential to create a sustainable construction industry. However, recycled concrete presents heterogeneous properties, thereby reducing its applications for some structural purposes and enhancing its application in pavements. This paper provides an insight into a solution in the deformation control for recycled concrete by adding supplementary cementitious materials fly ash and blast furnace slag. Results of this study indicated that the 50% fly ash replacement of Portland cement increased the rupture modulus of the recycled concrete. Conversely, a mixture with over 50% cement replacement by either fly ash or slag or a combination of both exhibited detrimental effect on the compressive strength, rupture modulus, and drying shrinkage. The combined analysis of environmental impacts and mechanical properties of recycled concrete demonstrated the possibility of optimizing the selection of recycled concrete because the best scenario in this study was obtained with the concrete mixture M8 (50% of fly ash+ 100% recycled coarse aggregate).

Keywords： recycled aggregate     recycled concrete     fly ash and slag    

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Planet position errors in planetary transmission: Effect on load sharing and transmission error

Miguel IGLESIAS, Alfonso FERNáNDEZ, Ana DE-JUAN, Ramón SANCIBRIáN, Pablo GARCíA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 80-87 doi: 10.1007/s11465-013-0362-7

Abstract:

In this paper an advanced model of spur gear transmissions developed by the authors is used to studyThe model, initially conceived for external gear modeling, has been extended with internal meshing features

Keywords： gear     planetary     epicyclic     transmission     load sharing     transmission error    

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High-precision gyro-stabilized control of a gear-driven platform with a floating gear tension device

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 487-503 doi: 10.1007/s11465-021-0635-5

Abstract: improved compound control algorithm that substantially enhances the anti-disturbance performance of a gear-drivegyro-stabilized platform with a floating gear tension device.However, the weaker gear support stiffness and more complex meshing friction are also induced by theFirst, the structural properties of the gear transmission and the friction-generating mechanism are analyzedpointing system with a floating gear tension device, which shows a maximum 76% improvement in stabilization

Keywords： inertially stabilized platform     floating gear tension device     nonlinear friction     disturbance compensation    

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100 Years of Gear Measurement Technology——Review & Prospect

Shi Zhaoyao,Fei Yetai,Xie Huakun

Strategic Study of CAE 2003, Volume 5, Issue 9,   Pages 13-17

Abstract:

The evolution of gear measurement technology in the past 100 years is fully reviewed, and 6 key issuesrelated to gear metrology are listed.Emphases are laid on the development of gear measurement principles, the evolution of technical measuresMeanwhile, the principle, configuration and features of present-day CNC Gear Measuring Center are introducedA few of new phenomena in the field of gear measurement technology are remarked, and some research topics

Keywords： gear     gear measurement     gear deviation     gear measuring instrument    

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Gear fault diagnosis using gear meshing stiffness identified by gearbox housing vibration signals

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0713-3

Abstract: Therefore, using gearbox housing vibration signal to identify gear meshing excitation signal is of greatThis paper establishes an analytical mathematical description of the whole transfer process from gearThe gear meshing stiffness (GMS) identification approach is proposed by using housing vibration signalsNumerical simulation and experimental results demonstrate the proposed method can realize gear faultspectra, and the results also validate the rationality of using meshing stiffness to describe the actual gear

Keywords： gearbox fault diagnosis     meshing stiffness     identification     transfer path     signal processing    

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Preparation of Nanoporous Carbonaceous Promoters for Enhanced CO2 Absorption in Tertiary Amines Review

Alivand, Omid Mazaheri, Yue Wu, Geoffrey W. Stevens, Colin A. Scholes, Kathryn A. Mumford

Engineering 2020, Volume 6, Issue 12,   Pages 1381-1394 doi: 10.1016/j.eng.2020.05.004

Abstract: synthesized, characterized, and used as rate promoters for CO2 absorption in aqueous N,N-diethylethanolamine (DEEA) solutions.

Keywords： CO2 absorption Nanofluid     N     N-diethylethanolamine     Nanoporous carbonaceous promoters     Polyamine    

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Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)

Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 1,   Pages 44-59 doi: 10.1007/s11465-015-0360-z

Abstract: leaders in the theory and geometry of gearing or the theoretical fundamentals of designing gears and gear-cuttingThis review involves some works on gear strength and accuracy to attract more experts.

Keywords： theory of gearing (TG)     gear geometry     generating surface     gear synthesis     gear analysis    

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Self-centering steel plate shear walls for improving seismic resilience

DOWDEN,Chao-Hsien LI,Jeffrey W. BERMAN,Michel BRUNEAU,Laura N. LOWES,Keh-Chuan TSAI

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 3,   Pages 283-290 doi: 10.1007/s11709-016-0344-z

Abstract: As part of a Network for Earthquake Engineering Simulation research project led by researchers at the University of Washington with collaborators at University at Buffalo, and Taiwan National Center for Research on Earthquake Engineering, a self-centering steel plate shear wall (SC-SPSW) system has been developed to achieve enhanced seismic performance objectives, including recentering. The SC-SPSW consists of thin steel infill panels, referred to as web plates that serve as the primary lateral load-resisting and energy dissipating element of the system. Post-tensioned (PT) beam-to-column connections provide system recentering capabilities. A performance-based design procedure has been developed for the SC-SPSW, and a series of nonlinear response history analyses have been conducted to verify intended seismic performance at multiple hazard levels. Quasi-static subassembly tests, quasi-static and shake table tests of scaled three-story specimens, and pseudo-dynamic tests of two full-scale two-story SC-SPSWs have been conducted. As a culmination of this multi-year, multi-institutional project, this paper will present an overview of the SC-SPSW numerical and experimental research programs. This paper will also discuss innovative PT connection and web plate designs that were investigated to improve constructability, resilience, and seismic performance and that can be applied to other self-centering and steel plate shear wall systems.

Keywords： self-centering     steel plate shear walls     large-scale experiment     post-tensioned connections     performance-based design    

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The MYC transcription factor network: balancing metabolism, proliferation and oncogenesis

Carroll, Brian W. Freie, Haritha Mathsyaraja, Robert N. Eisenman

Frontiers of Medicine 2018, Volume 12, Issue 4,   Pages 412-425 doi: 10.1007/s11684-018-0650-z

Abstract:

Transcription factor networks have evolved in order to control, coordinate, and separate, the functions of distinct network modules spatially and temporally. In this review we focus on the MYC network (also known as the MAX-MLX Network), a highly conserved super-family of related basic-helix-loop-helix-zipper (bHLHZ) proteins that functions to integrate extracellular and intracellular signals and modulate global gene expression. Importantly the MYC network has been shown to be deeply involved in a broad spectrum of human and other animal cancers. Here we summarize molecular and biological properties of the network modules with emphasis on functional interactions among network members. We suggest that these network interactions serve to modulate growth and metabolism at the transcriptional level in order to balance nutrient demand with supply, to maintain growth homeostasis, and to influence cell fate. Moreover, oncogenic activation of MYC and/or loss of a MYC antagonist, results in an imbalance in the activity of the network as a whole, leading to tumor initiation, progression and maintenance.

Keywords： network     transcription     cancer     MYC     MAX     MLX    

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UNREDUCED MEGAGAMETOPHYTE FORMATION VIA SECOND DIVISION RESTITUTION CONTRIBUTES TO TETRAPLOID PRODUCTION IN INTERPLOIDY CROSSES WITH ‘ORAH’ MANDARIN (

Qiangming XIA, Wei WANG, Kaidong XIE, Xiaomeng WU, Xiuxin DENG, Jude W. GROSSER, Wenwu GUO

Frontiers of Agricultural Science and Engineering   Pages 302-313 doi: 10.15302/J-FASE-2021385

Abstract: Also, we demonstrated that 2n megagametophyte formation in ‘Orah’ mandarin result in tetraploid productionBased on the genotypes of the 2n megagametophytes, the parental heterozygosity rates in 16 SNP loci andall 2n megagametophytes were less than 50%, indicating that second division restitution was the mechanismunderlying 2n megagametophyte formation at both the population and individual levels.

Keywords： Citrus     2n gamete     interploidy hybridization     pericentromeric SNP marker     second division restitution    

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Fault feature extraction of planet gear in wind turbine gearbox based on spectral kurtosis and time wavelet

Yun KONG, Tianyang WANG, Zheng LI, Fulei CHU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 406-419 doi: 10.1007/s11465-017-0419-0

Abstract: vibration transfer path, and heavy background noise masking effect, the vibration signal of planet gearimpulsive components induced by a localized defect are hard to extract, and the fault detection of planet gearAiming to extract the fault feature of planet gear effectively, we propose a novel feature extractionthat the proposed method is effective at the feature extraction and fault diagnosis for the planet gear

Keywords： wind turbine     planet gear fault     feature extraction     spectral kurtosis     time wavelet energy spectrum    

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Simultaneous harvesting and cell disruption of microalgae using ozone bubbles: optimization and characterization study for biodiesel production

Wan N. A. Kadir, Man K. Lam, Yoshimitsu Uemura, Jun W. Lim, Peck L. Kiew, Steven Lim, Siti S.

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1257-1268 doi: 10.1007/s11705-020-2015-9

Abstract: In the present study, ozone was introduced as an alternative approach to harvest and disrupt microalgae cells ( ) simultaneously for biodiesel production. At the optimum ozonation conditions (6.14 g·h ozone concentration, 30 min ozonation time, 1 L·min of ozone flowrate at medium pH of 10 and temperature of 30 °C), the sedimentation efficiency of microalgae cells increased significantly from 12.56% to 68.62%. It was observed that the microalgae cells aggregated to form flocs after pre-treated with ozone due to the increment of surface charge from –20 to –6.59 mV. Besides, ozone had successfully disrupted the microalgae cells and resulted in efficient lipid extraction, which was 1.9 times higher than the control sample. The extracted microalgae lipid was mainly consisted of methyl palmitate (C16:0), methyl oleate (C18:1) and methyl linolenate (C18:3), making it suitable for biodiesel production. Finally, utilization of recycled culture media after ozonation pre-treatment showed robust growth of microalgae, in which the biomass yield was maintained in the range of 0.796 to 0.879 g·h for 5 cycles of cultivation.

Keywords： microalgae     biodiesel     ozonation     pre-treatment     lipid    

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Experimental investigation of fatigue behavior of spur gear in altered tooth-sum gearing

H. K. SACHIDANANDA, Joseph GONSALVIS, H. R. PRAKASH

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 3,   Pages 268-278 doi: 10.1007/s11465-012-0331-6

Abstract:

This paper deals with the contact stress, power loss, and pitting of spur gear tooth in altered tooth-sum

Keywords： spur gear     power recirculating test rig     altered tooth-sum gearing     scanning electron microscopy (SEM)    

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Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 9-9 doi: 10.1007/s11465-021-0665-z

Abstract: Gear wear is one of the most common gear failures, which changes the mesh relationship of normal gearthe model of mesh relationship and reveal the vibration characteristics of external spur gears with gearthe influence of gear wear on mesh stiffness and unloaded static transmission error (USTE).Based on the mesh stiffness and USTE considering gear wear, a gear dynamic model is established, andthe vibration characteristics of gear wear are numerically studied.

Keywords： gear wear     mesh relationship     mesh stiffness     transmission error     vibration characteristics    

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Title Author Date Type Operation

Mathematical model and manufacture programming of loxodromic-type normal circular-arc spiral bevel gear

Zhenyun DUAN, Houjun CHEN, Zhilan JU, Jian LIU

Journal Article

Effect of fly ash and slag on concrete: Properties and emission analyses

Vivian W. Y. TAM, Khoa N. LE, Ana Catarina Jorge EVANGELISTA, Anthony BUTERA, Cuong N. N.

Journal Article

Planet position errors in planetary transmission: Effect on load sharing and transmission error

Miguel IGLESIAS, Alfonso FERNáNDEZ, Ana DE-JUAN, Ramón SANCIBRIáN, Pablo GARCíA

Journal Article

High-precision gyro-stabilized control of a gear-driven platform with a floating gear tension device

Journal Article

100 Years of Gear Measurement Technology——Review & Prospect

Shi Zhaoyao,Fei Yetai,Xie Huakun

Journal Article

Gear fault diagnosis using gear meshing stiffness identified by gearbox housing vibration signals

Journal Article

Preparation of Nanoporous Carbonaceous Promoters for Enhanced CO2 Absorption in Tertiary Amines

Alivand, Omid Mazaheri, Yue Wu, Geoffrey W. Stevens, Colin A. Scholes, Kathryn A. Mumford

Journal Article

Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)

Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA

Journal Article

Self-centering steel plate shear walls for improving seismic resilience

DOWDEN,Chao-Hsien LI,Jeffrey W. BERMAN,Michel BRUNEAU,Laura N. LOWES,Keh-Chuan TSAI

Journal Article

The MYC transcription factor network: balancing metabolism, proliferation and oncogenesis

Carroll, Brian W. Freie, Haritha Mathsyaraja, Robert N. Eisenman

Journal Article

UNREDUCED MEGAGAMETOPHYTE FORMATION VIA SECOND DIVISION RESTITUTION CONTRIBUTES TO TETRAPLOID PRODUCTION IN INTERPLOIDY CROSSES WITH ‘ORAH’ MANDARIN (

Qiangming XIA, Wei WANG, Kaidong XIE, Xiaomeng WU, Xiuxin DENG, Jude W. GROSSER, Wenwu GUO

Journal Article

Fault feature extraction of planet gear in wind turbine gearbox based on spectral kurtosis and time wavelet

Yun KONG, Tianyang WANG, Zheng LI, Fulei CHU

Journal Article

Simultaneous harvesting and cell disruption of microalgae using ozone bubbles: optimization and characterization study for biodiesel production

Wan N. A. Kadir, Man K. Lam, Yoshimitsu Uemura, Jun W. Lim, Peck L. Kiew, Steven Lim, Siti S.

Journal Article

Experimental investigation of fatigue behavior of spur gear in altered tooth-sum gearing

H. K. SACHIDANANDA, Joseph GONSALVIS, H. R. PRAKASH

Journal Article

Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear

Journal Article