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Transfer function solving, simulating and testing of thermal dynamics characteristics of a ballscrew

Junyong XIA, Bo WU, Youmin HU, Tielin SHI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2,   Pages 233-241 doi: 10.1007/s11465-010-0014-0

Abstract: Based on the theory of heat transfer, the transfer function between the thermal deformation of any pointBy solving the amplitude-frequency characteristics and phase-frequency characteristics of the transferfunction, the steady-state response of thermal deformation of the ballscrew is obtained, and the thermalof tests by and large accord with the theoretical analyzing result, which shows that the method of transferfunction is correct and valid in solving the steady-state response of thermal deformation.

Keywords： ballscrew     Laplace transform     transfer function     thermal dynamic characteristics    

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New model of load transfer function for pile analysis based on disturbed state model

LIU Qijian, YANG Linde, WU Jun

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 443-447 doi: 10.1007/s11709-007-0060-9

Abstract: Based on the disturbed state concept (DSC), a new model of load transfer function for pile analysis isThe model of this paper has few parameters, which can reflect the aspects of load transfer function,

Keywords： hardening     homogenization     displacement     engineering     Duncan-Zhang    

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Natural convection heat transfer of water in a horizontal circular gap

SU Guanghui, WU Yingwei, Kenichiro Sugiyama

Frontiers in Energy 2007, Volume 1, Issue 2,   Pages 167-173 doi: 10.1007/s11708-007-0021-y

Abstract: An experimental study on the natural convection heat transfer on a horizontal downward facing heatedThe results show that the buoyancy force acts as a resistance force for natural convection heat transferFor the estimation of the natural convection heat transfer under the present conditions, empirical correlationsin which Nusselt number is expressed as a function of the Rayleigh number, or both Rayleigh and PrandtlWhen it is accurately predicted, the Nusselt number is expressed as a function of the Rayleigh and Prandtl

Keywords： function     diameter     different independent     different characteristic     horizontal downward    

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A modified zone model for estimating equivalent room thermal capacity

Hua CHEN, Xiaolin WANG

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 351-357 doi: 10.1007/s11708-013-0254-x

Abstract: for the building enclosure was developed based on the building thermal network analytical theory and transferfunction method.

Keywords： room model     thermal network analysis     transfer function     heating     ventilation and air conditioning (HVAC)    

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A model reference adaptive control based method for actuator delay estimation in real-time testing

Cheng CHEN, James M. RICLES

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 277-286 doi: 10.1007/s11709-010-0072-8

Abstract: Real-time testing provides a viable experimental technique to evaluate the performance of structural systems subjected to dynamic loading. Servo-hydraulic actuators are often utilized to apply calculated displacements from an integration algorithm to the experimental structures in a real-time manner. The compensation of actuator delay is therefore critical to achieve stable and reliable experimental results. The advances in compensation methods based on adaptive control theory enable researchers to accommodate variable actuator delay and achieve good actuator control for real-time tests. However, these adaptive methods all require time duration for actuator delay adaptation. Experiments show that a good actuator delay estimate can help optimize the performance of the adaptive compensation methods. The rate of adaptation also requires that a good actuator delay estimate be acquired especially for the tests where the peak structural response might occur at the beginning of the tests. This paper presents a model reference adaptive control based method to identify the parameter of a simplified discrete model for servo-hydraulic dynamics and the resulting compensation method. Simulations are conducted using both numerical analysis and experimental results to evaluate the effectiveness of the proposed estimation method.

Keywords： real-time testing     actuator delay     compensation     adaptive control     MIT rule     discrete transfer function    

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Augmentation of natural convective heat transfer by acoustic cavitation

Jun CAI, Xiulan HUAI, Shiqiang LIANG, Xunfeng LI,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 313-318 doi: 10.1007/s11708-009-0064-3

Abstract: experimental study was conducted to investigate the effects of acoustic cavitation on natural convective heat transferThe experimental results indicated that heat transfer could be enhanced by acoustic cavitation and had

Keywords： heat transfer enhancement     augmentation     acoustic cavitation     acoustic streaming     convective heat transfer    

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Lung function and air pollution exposure in adults with asthma in Beijing: a 2-year longitudinal panel

Frontiers of Medicine 2022, Volume 16, Issue 4,   Pages 574-583 doi: 10.1007/s11684-021-0882-1

Abstract: The effect of air pollution on the lung function of adults with asthma remains unclear to date.The participants were divided into three groups according to their lung function level at every visitA linear mixed-effect model was applied to predict the change in lung function with each unit changeExposure to CO and PM2.5 was negatively associated with the large airway function of adultsPatients with asthma react differently to air pollutants as evidenced by their lung function levels.

Keywords： lung function     asthma     air pollution     adult    

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Experimental study of heat transfer coefficient with rectangular baffle fin of solar air heater

Foued CHABANE,Nesrine HATRAF,Noureddine MOUMMI

Frontiers in Energy 2014, Volume 8, Issue 2,   Pages 160-172 doi: 10.1007/s11708-014-0321-y

Abstract: The heat transfer coefficient between the absorber plate and air can be considerably increased by usingexperimental study has been conducted to investigate the effect of roughness and operating parameters on heat transferTo determine the enhancement in heat transfer and increment in thermal efficiency, the values of Nusselt

Keywords： Nusselt number     flow rate     heat transfer     heat transfer coefficient     thermal efficiency     forced convection    

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Effect of heat transfer space non-uniformity of combustion chamber components on in-cylinder heat transfer

Jizu LV, Minli BAI, Long ZHOU, Jian ZHOU,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 392-401 doi: 10.1007/s11708-009-0066-1

Abstract: Based on the three-dimensional numerical simulation of the heat transfer of the coupled body, a coupledThe model was applied in the investigation of the influence of space non-uniformity in heat transferamong combustion chamber components on in-cylinder heat transfer.effect of wall temperature space non-uniform distribution of combustion chamber components on heat transferwall temperature space non-uniform distribution of combustion chamber components would influence heat transfer

Keywords： heat transfer     space non-uniformity     soot emission     in-cylinder     diesel    

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The function and regulation of OTU deubiquitinases

Jiansen Du, Lin Fu, Yingli Sui, Lingqiang Zhang

Frontiers of Medicine 2020, Volume 14, Issue 5,   Pages 542-563 doi: 10.1007/s11684-019-0734-4

Abstract: These OTUs show great variation in structure and function, which display a series of mechanistic featuresIn this review, we provide a comprehensive analysis of current progress in character, structure and functionFinally, we summarize the structure of viral OTUs and their function in immune escape and viral survival

Keywords： ubiquitin     OTU deubiquitinases     structure     function     regulation    

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Analogue Difference Balanced Function and Its Applications

Zhang Wenying,Li Shiqu

Strategic Study of CAE 2004, Volume 6, Issue 3,   Pages 45-52

Abstract:

This paper presents the concept of analogous difference of Boolean function, and call the Booleanfunction an analogue difference balanced function if whose analogous difference is balanced at any nonzeroof analogue bent functions, the paper proposes an efficient and sufficient condition for a logical function

Keywords： Bent function     perfect nonlinear function     2-radical expansion     analogue difference     analogue auto-correlationfunction     analogue difference balanced function    

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Heat transfer coefficient of wheel rim of large capacity steam turbines

SHI Jinyuan, DENG Zhicheng, YANG Yu, JUN Ganwen

Frontiers in Energy 2008, Volume 2, Issue 1,   Pages 20-24 doi: 10.1007/s11708-008-0015-4

Abstract: A way of calculating the overall equivalent heat transfer coefficient of wheel rims of large capacityThe method and formula to calculate the mean forced convection heat-transfer coefficient of the surfaceA fin heat transfer model was then used to calculate the equivalent heat transfer coefficient of theThe overall equivalent heat transfer coefficient of the wheel rim was then calculated using a cylindricalThe proposed method helps determine the heat transfer boundary conditions in finite element analyses

Keywords： convection heat-transfer     capacity     heat-transfer coefficient     bottom     transmission    

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Review of the LNG intermediate fluid vaporizer and its heat transfer characteristics

Frontiers in Energy 2022, Volume 16, Issue 3,   Pages 429-444 doi: 10.1007/s11708-021-0747-y

Abstract: In this present paper, studies of IFV and its heat transfer characteristics in the LNG vaporization unitMoreover, studies on the fluid flow and heat transfer behaviors of the supercritical LNG inside the tubesand the condensation heat transfer of the intermediate fluid outside the tubes are summarized.In the thermal calculations of the IFV, the selections of the existing heat transfer correlations aboutFurthermore, corresponding experiments or numerical simulations on the cryogenic condensation heat transfer

Keywords： intermediate fluid vaporizer     design of structure and intermediate fluid     condensation heat transfer    

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Improving hole transfer of boron nitride quantum dots modified PDI for efficient photodegradation

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1718-1727 doi: 10.1007/s11705-023-2319-7

Abstract: In recent years, organic photocatalyst under visible-light absorption has shown significant potential for solving environmental problems. However, it is still a great challenge for constructing a highly active organic photocatalyst due to the low separation efficiency of photogenerated carriers. Herein, an effective and robust photocatalyst perylene-3,4,9,10-tetracarboxylic diamide/boron nitride quantum dots (PDI/BNQDs), consisting of self-assemble PDI with π–π stacking structure and BNQDs, has been constructed and researched under visible light irradiation. The PDI/BNQDs composite gradually increases organic pollutant photodegradation with the loading amount of BNQDs. With 10 mL of BNQDs solution added (PDI/BNQDs-10), the organic pollutant photodegradation performance reaches a maximum, about 6.16 times higher with methylene blue and 1.68 times higher with ciprofloxacin than that of pure PDI supramolecular. The enhancement is attributed to improved separation of photogenerated carriers from self-assembled PDI by BNQDs due to their preeminent ability to extract holes. This work is significant for the supplement of PDI supramolecular composite materials. We believe that this photocatalytic design is capable of expanding organic semiconductors’ potential for their applications in photocatalysis.

Keywords： PDI     boron nitride     quantum dots     photocatalysis     hole transfer    

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Quality Function Deployment Implementation in Construction: A Systematic Literature Review

Elizabeth A. Cudney,William L. Gillis

Frontiers of Engineering Management 2016, Volume 3, Issue 3,   Pages 224-230 doi: 10.15302/J-FEM-2016036

Abstract: Quality function deployment has been successfully used in product development to capture the voice ofQuality function deployment then carries these parameters into production and service to ensure the voiceThe house of quality, a tool within quality function deployment, can provide a means for comparison ofQuality function deployment can effectively link the project phases through design and construction andThe research method used is a systematic literature review from databases related to quality function

Keywords： construction     engineering management     quality function deployment     systematic review    

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Title Author Date Type Operation

Transfer function solving, simulating and testing of thermal dynamics characteristics of a ballscrew

Junyong XIA, Bo WU, Youmin HU, Tielin SHI,

Journal Article

New model of load transfer function for pile analysis based on disturbed state model

LIU Qijian, YANG Linde, WU Jun

Journal Article

Natural convection heat transfer of water in a horizontal circular gap

SU Guanghui, WU Yingwei, Kenichiro Sugiyama

Journal Article

A modified zone model for estimating equivalent room thermal capacity

Hua CHEN, Xiaolin WANG

Journal Article

A model reference adaptive control based method for actuator delay estimation in real-time testing

Cheng CHEN, James M. RICLES

Journal Article

Augmentation of natural convective heat transfer by acoustic cavitation

Jun CAI, Xiulan HUAI, Shiqiang LIANG, Xunfeng LI,

Journal Article

Lung function and air pollution exposure in adults with asthma in Beijing: a 2-year longitudinal panel

Journal Article

Experimental study of heat transfer coefficient with rectangular baffle fin of solar air heater

Foued CHABANE,Nesrine HATRAF,Noureddine MOUMMI

Journal Article

Effect of heat transfer space non-uniformity of combustion chamber components on in-cylinder heat transfer

Jizu LV, Minli BAI, Long ZHOU, Jian ZHOU,

Journal Article

The function and regulation of OTU deubiquitinases

Jiansen Du, Lin Fu, Yingli Sui, Lingqiang Zhang

Journal Article

Analogue Difference Balanced Function and Its Applications

Zhang Wenying,Li Shiqu

Journal Article

Heat transfer coefficient of wheel rim of large capacity steam turbines

SHI Jinyuan, DENG Zhicheng, YANG Yu, JUN Ganwen

Journal Article

Review of the LNG intermediate fluid vaporizer and its heat transfer characteristics

Journal Article

Improving hole transfer of boron nitride quantum dots modified PDI for efficient photodegradation

Journal Article

Quality Function Deployment Implementation in Construction: A Systematic Literature Review

Elizabeth A. Cudney,William L. Gillis

Journal Article