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Construction survey technology on concrete construction of Three Gorges Project ship lift tower

Luo Chen,Yan Chunbo

Strategic Study of CAE 2013, Volume 15, Issue 9,   Pages 97-101

Abstract: The construction survey technologies, including zenith telescope planar cast point, electromagnetic distance

Keywords： construction survey     zenith telescope cast point     electromagnetic distance measuring     spatial positioning    

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Premature melt solidification during mold filling and its influence on the as-cast structure

M. WU, M. AHMADEIN, A. LUDWIG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1,   Pages 53-65 doi: 10.1007/s11465-017-0437-y

Abstract: used as the initial conditions for the subsequent solidification simulation of the evolution of the as-cast

Keywords： premature solidification     mold filling     as-cast structure     modeling    

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Propagation characteristics of transient waves in low-strain integrity testing on cast-in-situ concrete

Hanlong LIU, Xuanming DING

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 240-240 doi: 10.1007/s11709-009-0100-8

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Synergistic effects of sodium hypochlorite disinfection and iron-oxidizing bacteria on early corrosion in cast

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-021-1506-3

Abstract:

• The early corrosion process in the cast iron pipes was investigated

Keywords： Cast iron pipe corrosion     Drinking water distribution systems     Chlorine disinfection     Iron-oxidizing    

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With Great Expectations, Webb Telescope Finally Lifts Off

Mitch Leslie

Engineering 2022, Volume 11, Issue 4,   Pages 3-5 doi: 10.1016/j.eng.2022.02.002

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Recognition of Graphite Morphology in Nodular Cast Iron Based on Extenics

Chen Zhibin,Yu Yongquan,Yang Shaomin

Strategic Study of CAE 2005, Volume 7, Issue 3,   Pages 84-89

Abstract:

The basic types of graphite morphology in nodular cast iron is introduced.

Keywords： matter-element model     extension classification tree     graphite morphology     nodular cast iron    

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Kinematic calibration of precise 6-DOF stewart platform-type positioning systems for radio telescope

Juan Carlos JáUREGUI, Eusebio E. HERNáNDEZ, Marco CECCARELLI, Carlos LóPEZ-CAJúN, Alejandro GARCíA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3,   Pages 252-260 doi: 10.1007/s11465-013-0249-7

Abstract:

The pose accuracy of a parallel robot is a function of the mobile platform posture. Thus, there is no a single value of the robot’s accuracy. In this paper, two novel methods for estimating the accuracy of parallel robots are presented. In the first method, the pose accuracy estimation is calculated by considering the propagation of each error, i.e., error variations are considered as a function of the actuator’s stroke. In the second method, it is considered that each actuator has a constant error at any stroke. Both methods can predict pose accuracy of precise robots at design stages, and/or can reduce calibration time of existing robots. An example of a six degree-of-freedom parallel manipulator is included to show the application of the proposed methods.

Keywords： pose errors     error estimation     parallel robot     radio telescopes    

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Defect passivation on cast-mono crystalline screen-printed cells

Alison WENHAM,Lihui SONG,Malcolm ABBOTT,Iskra ZAFIROVSKA,Sisi WANG,Brett HALLAM,Catherine CHAN,Allen BARNETT,Stuart WENHAM

Frontiers in Energy 2017, Volume 11, Issue 1,   Pages 60-66 doi: 10.1007/s11708-016-0443-5

Abstract: Cast-mono crystalline silicon wafers contain crystallographic defects, which can severely impact themoderate temperatures to finished screen print cells can passivate dislocation clusters within the cast-mono

Keywords： silicon solar cell     dislocation     cast-mono     laser     hydrogen passivation    

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Influence of surface cracking, anchor head profile, and anchor head size on cast-in headed anchors in

Frontiers of Structural and Civil Engineering   Pages 1163-1187 doi: 10.1007/s11709-023-0987-5

Abstract: In this study, the concrete cone capacity, concrete cone angle, and load–displacement response of cast-in

Keywords： cast-in anchor     concrete cone capacity     geopolymer concrete     head size     surface crack     anchor profile    

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Study on the Formation and Elimination of Coarse Grains in Cast Steel

Zou Anquan,Deng Peiran

Strategic Study of CAE 2005, Volume 7, Issue 4,   Pages 79-82

Abstract: through analyzing the formation of coarse grains and tests for eliminating coarse grains on ZG32Cr06 cast

Keywords： cast steel     coarse grain     water explosion blast cleaning     measures of elimination    

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Task-space position/attitude tracking control of FAST fine tuning system

QI Lin, ZHANG Hui, DUAN Guanghong

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 392-399 doi: 10.1007/s11465-008-0056-8

Abstract: parallel robot, which is being developed in the framework of a five-hundred meter aperture spherical radio telescope

Keywords： telescope     five-hundred     end-effector     controller     simulation    

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STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4,   Pages 503-509 doi: 10.15302/J-FASE-2023528

Abstract:

STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Keywords： GREEN     AGRICULTURAL     PROMOTE     POLLUTION     SOURCE     DEVELOPMENT     POINT     STRENGTHENING     CONTROL    

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Webb Space Telescope Hits Its Stride, Dazzling Astronomers

Mitch Leslie

Engineering 2023, Volume 22, Issue 3,   Pages 3-6 doi: 10.1016/j.eng.2023.01.003

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Trajectory planning of mobile robots using indirect solution of optimal control method in generalized point-to-point

M. NAZEMIZADEH, H. N. RAHIMI, K. AMINI KHOIY

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 23-28 doi: 10.1007/s11465-012-0304-9

Abstract:

This paper presents an optimal control strategy for optimal trajectory planning of mobile robots by considering nonlinear dynamic model and nonholonomic constraints of the system. The nonholonomic constraints of the system are introduced by a nonintegrable set of differential equations which represent kinematic restriction on the motion. The Lagrange’s principle is employed to derive the nonlinear equations of the system. Then, the optimal path planning of the mobile robot is formulated as an optimal control problem. To set up the problem, the nonlinear equations of the system are assumed as constraints, and a minimum energy objective function is defined. To solve the problem, an indirect solution of the optimal control method is employed, and conditions of the optimality derived as a set of coupled nonlinear differential equations. The optimality equations are solved numerically, and various simulations are performed for a nonholonomic mobile robot to illustrate effectiveness of the proposed method.

Keywords： mobile robot     trajectory planning     nonlinear dynamic     optimal control    

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Toward autonomous mining: design and development of an unmanned electric shovel via point cloud-based

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0686-2

Abstract: Initially, the point cloud of the material surface is collected and reconstructed by polynomial responseThen, by establishing the dynamical model of the UES, a point to point (PTP) excavation trajectory planning

Keywords： autonomous excavation     unmanned electric shovel     point cloud     excavation trajectory planning    

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Title Author Date Type Operation

Construction survey technology on concrete construction of Three Gorges Project ship lift tower

Luo Chen,Yan Chunbo

Journal Article

Premature melt solidification during mold filling and its influence on the as-cast structure

M. WU, M. AHMADEIN, A. LUDWIG

Journal Article

Propagation characteristics of transient waves in low-strain integrity testing on cast-in-situ concrete

Hanlong LIU, Xuanming DING

Journal Article

Synergistic effects of sodium hypochlorite disinfection and iron-oxidizing bacteria on early corrosion in cast

Journal Article

With Great Expectations, Webb Telescope Finally Lifts Off

Mitch Leslie

Journal Article

Recognition of Graphite Morphology in Nodular Cast Iron Based on Extenics

Chen Zhibin,Yu Yongquan,Yang Shaomin

Journal Article

Kinematic calibration of precise 6-DOF stewart platform-type positioning systems for radio telescope

Juan Carlos JáUREGUI, Eusebio E. HERNáNDEZ, Marco CECCARELLI, Carlos LóPEZ-CAJúN, Alejandro GARCíA

Journal Article

Defect passivation on cast-mono crystalline screen-printed cells

Alison WENHAM,Lihui SONG,Malcolm ABBOTT,Iskra ZAFIROVSKA,Sisi WANG,Brett HALLAM,Catherine CHAN,Allen BARNETT,Stuart WENHAM

Journal Article

Influence of surface cracking, anchor head profile, and anchor head size on cast-in headed anchors in

Journal Article

Study on the Formation and Elimination of Coarse Grains in Cast Steel

Zou Anquan,Deng Peiran

Journal Article

Task-space position/attitude tracking control of FAST fine tuning system

QI Lin, ZHANG Hui, DUAN Guanghong

Journal Article

STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Journal Article

Webb Space Telescope Hits Its Stride, Dazzling Astronomers

Mitch Leslie

Journal Article

Trajectory planning of mobile robots using indirect solution of optimal control method in generalized point-to-point

M. NAZEMIZADEH, H. N. RAHIMI, K. AMINI KHOIY

Journal Article

Toward autonomous mining: design and development of an unmanned electric shovel via point cloud-based

Journal Article