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Precision control system of two-DOF stage with linear ultrasonic motor

ZHANG Hanlei, SHI Yunlai, ZHAO Chunsheng

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 421-425 doi: 10.1007/s11465-008-0063-9

Abstract: In this paper, a closed loop PI control system is designed to achieve high position accuracy during thecontrol of a two-DOF stage driven by linear ultrasonic motors.Two ultrasonic motors are mounted on the stage to generate motion in two orthogonal directions.

Keywords： settling     position accuracy     PI control     control algorithm     orthogonal    

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New form of geodetic coordinate system taking two length quantity as coordinate parameters

Yimin SHI, Ziyang ZHU, Yeming FAN

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1,   Pages 105-110 doi: 10.1007/s11709-009-0014-5

Abstract: A new form of geodetic coordinate system based on geodesic coordinates instead of geodetic longitudehorizontal geodesic coordinates measured with length were defined as coordinate parameters, but the twoconvenient and accurate enough to operate on the ellipsoidal surface in this new form of geodetic coordinate system

Keywords： geodetic coordinate system     meridian and parallel circle     coordinate parameter     the first fundamental form    

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Sustainability performance analysis of environment innovation systems using a two-stage network DEA model

Frontiers of Engineering Management   Pages 425-438 doi: 10.1007/s42524-022-0205-5

Abstract: The term environmental innovation system refers to an innovation network composed of enterprises, universitiesAn environmental innovation system not only exerts important impact on the achievement of carbon neutralitysystem while ignoring its internal structure.A two-stage data envelopment analysis (DEA) model is developed in this study to analyze the efficiencyof Chinese regional environmental innovation system by opening the “black box” and considering shared

Keywords： data envelopment analysis     environmental efficiency     environmental innovation system     shared resources     two-stage structure    

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Efficiency measurement for mixed two-stage nonhomogeneous network processes with shared extra intermediate

Qingxian AN, Xuyang LIU, Shijie DING

Frontiers of Engineering Management 2020, Volume 7, Issue 2,   Pages 259-274 doi: 10.1007/s42524-019-0080-x

Abstract: Unreasonable allocation of shared resources reduces the system efficiency and is a considerable operationalmay cause internal contradictions among sub-processes and even lead to the collapsing of the entire systemThis study proposes a data-driven, mixed two-stage network data envelopment analysis model.shared extra intermediate resources among several nonhomogeneous subsystems and measure the overall system

Keywords： shared resource allocation     mixed two-stage system     data envelopment analysis     efficiency    

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Load shedding scheme for the two-area system with linear quadratic regulator

D. TYAGI, Ashwani KUMAR, Saurabh CHANANA

Frontiers in Energy 2013, Volume 7, Issue 1,   Pages 90-102 doi: 10.1007/s11708-012-0224-8

Abstract: The power system is prone to many emergency conditions which may lead to emergency state of operationwith decay in the system frequency.The dramatic change in the frequency can result in cascaded failure of the system.This paper proposed a methodology in a two-area thermal-thermal system for finding the required amountA comparison of the results has been presented on the two-area system.

Keywords： critical load     frequency response     load shedding (LS)     multi-area system     rate of change of frequency     linear    

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MHD effect on the critical temperature differences of oscillatory thermocapillary convection in two-layerfluid system

Hulin HUANG, Xiaoming ZHOU,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 155-160 doi: 10.1007/s11708-009-0063-4

Abstract: thermocapillary convection in a rectangular cavity with differentially heated side walls filled with twoIn this two-layer fluid system, the upper layer fluid is the electrically non-conducting encapsulantThe interface between the two fluids is assumed to be flat and non-deformable.

Keywords： magnetohydrodynamic     magnetic fields     thermocapillary convection     critical temperature difference     oscillatory convection     two-layerfluid system    

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Two-phase Partitioning Bioreactor, Application of Cloud Point System in Bioconversion

Wang Zhilong

Strategic Study of CAE 2005, Volume 7, Issue 5,   Pages 73-78

Abstract:

The two-phase partitioning bioreactor is usually applied in many bioprocesses for enhancing the productivityThis article examines recent research on methods of the two-phase partitioning bioreactor.The practical potential of cloud point system as a novel two-phase partitioning bioreactor is illustrated

Keywords： two-phase partitioning     bioconversion     nonionic surfactant     cloud point system     bioreactor    

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The model and process simulation of multi-effect two stage evaporation system with solid separation

Li Ling, Ruan Qi

Strategic Study of CAE 2008, Volume 10, Issue 10,   Pages 54-60

Abstract:

A mathematical model of conventional design for the multi-effect twostage evaporation system with condensed water flash and solid separation was established.Mass balance and energy balance equations of the system were expressed in matrix equation that has thecorrelative block-smatrix in matrix equation, matrix equation could be used to describe the multi-effect twostage evaporation system without condensed water flash or solid separation.

Keywords： solid separation     mathematical model of multi-effect two stage evaporation     condensed water flash    

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Impact of wind power generating system integration on frequency stabilization in multi-area power system

Y. K. BHATESHVAR,H. D. MATHUR,H. SIGUERDIDJANE

Frontiers in Energy 2015, Volume 9, Issue 1,   Pages 7-21 doi: 10.1007/s11708-014-0338-2

Abstract: Among the available options for renewable energy integration in existing power system, wind power isThe major constraint of wind power generating system (WPGS) is that it does not provide inertial supportThe proposed control strategy suggests a substantial contribution to system inertia in terms of short-termactive power support in a two area restructured power system.Variation of load conditions are also analyzed in simulation studies for the same power system model

Keywords： two area power system     automatic generation control     wind power generating system (WPGS)     deregulated environment    

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Carbon dots-based fluorescence sensor for two-photon imaging of pH in diabetic mice

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3,   Pages 298-306 doi: 10.1007/s11705-022-2212-9

Abstract: Finally, the CA-CDs has been successfully applied for two-photon imaging of the pH in liver and kidney

Keywords： carbon dots     two-photon imaging     pH     diabetic mice    

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New medical risks affecting obstetrics after implementation of the two-child policy in China

Qiang Li, Dongrui Deng

Frontiers of Medicine 2017, Volume 11, Issue 4,   Pages 570-575 doi: 10.1007/s11684-017-0552-5

Abstract:

China recently instituted a two-child policy in response to its aging population, declining workforce

Keywords： two-child policy     birth defects     cesarean delivery     placenta previa    

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Extended two-fluid model applied to analysis of bubbly flow in multiphase rotodynamic pump impeller

Zhiyi YU, Guoyu WANG, Shuliang CAO

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 53-59 doi: 10.1007/s11465-009-0006-0

Abstract: This paper presents an extended two-fluid model based on the Navier-Stokes equations and the standardThe discrete equations are solved using a developed two-phase semi-implicit method for pressure-linkedequations, consistent (SIMPLEC) algorithm in body-fitted coordinates with a staggered grid system.Simulation is then carried out for the pure liquid flow and air-water two-phase flow with the inlet gas

Keywords： two-fluid model     multiphase rotodynamic pump     SIMPLEC algorithm     numerical simulation    

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Feasible workspace regions for general two-revolute manipulator

Conghui LIANG, Marco CECCARELLI

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4,   Pages 397-408 doi: 10.1007/s11465-011-0228-9

Abstract:

In this paper, a topology is presented for feasible workspace regions in general two-revolute manipulatorsThree general cases are analyzed in details to characterize workspace design capabilities for general two-revolute

Keywords： workspace     two-revolute manipulators     topology analysis     design    

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Offline motion planning and simulation of two-robot welding coordination

Tie ZHANG, Fan OUYANG

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 81-92 doi: 10.1007/s11465-012-0309-4

Abstract:

This paper focuses on the two-robot welding coordination of complex curve seam which means one robotgrasp the workpiece, the other hold the torch, the two robots work on the same workpiece simultaneouslyThis paper builds the dual-robot coordinate system at the beginning, and three point calibration methodof two robots’ relative base coordinate system is presented.slave scheme sets the poses versus time function of the point u on the workpiece, and calculates the two

Keywords： complex curve seam     two robots     coordinated welding     motion planning    

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Simulation of heterogeneous two-phase media using random fields and level sets

George STEFANOU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 114-120 doi: 10.1007/s11709-014-0267-5

Abstract: This paper provides a critical examination of existing random field models of heterogeneous two-phaseTwo numerical examples are provided to illustrate the basic features of the different approaches.

Keywords： microstructure     random fields     level sets     shape recovery     two-phase media    

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Title Author Date Type Operation

Precision control system of two-DOF stage with linear ultrasonic motor

ZHANG Hanlei, SHI Yunlai, ZHAO Chunsheng

Journal Article

New form of geodetic coordinate system taking two length quantity as coordinate parameters

Yimin SHI, Ziyang ZHU, Yeming FAN

Journal Article

Sustainability performance analysis of environment innovation systems using a two-stage network DEA model

Journal Article

Efficiency measurement for mixed two-stage nonhomogeneous network processes with shared extra intermediate

Qingxian AN, Xuyang LIU, Shijie DING

Journal Article

Load shedding scheme for the two-area system with linear quadratic regulator

D. TYAGI, Ashwani KUMAR, Saurabh CHANANA

Journal Article

MHD effect on the critical temperature differences of oscillatory thermocapillary convection in two-layerfluid system

Hulin HUANG, Xiaoming ZHOU,

Journal Article

Two-phase Partitioning Bioreactor, Application of Cloud Point System in Bioconversion

Wang Zhilong

Journal Article

The model and process simulation of multi-effect two stage evaporation system with solid separation

Li Ling, Ruan Qi

Journal Article

Impact of wind power generating system integration on frequency stabilization in multi-area power system

Y. K. BHATESHVAR,H. D. MATHUR,H. SIGUERDIDJANE

Journal Article

Carbon dots-based fluorescence sensor for two-photon imaging of pH in diabetic mice

Journal Article

New medical risks affecting obstetrics after implementation of the two-child policy in China

Qiang Li, Dongrui Deng

Journal Article

Extended two-fluid model applied to analysis of bubbly flow in multiphase rotodynamic pump impeller

Zhiyi YU, Guoyu WANG, Shuliang CAO

Journal Article

Feasible workspace regions for general two-revolute manipulator

Conghui LIANG, Marco CECCARELLI

Journal Article

Offline motion planning and simulation of two-robot welding coordination

Tie ZHANG, Fan OUYANG

Journal Article

Simulation of heterogeneous two-phase media using random fields and level sets

George STEFANOU

Journal Article