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Isogeometric topology optimization based on energy penalization for symmetric structure

Xianda XIE, Shuting WANG, Ming YE, Zhaohui XIA, Wei ZHAO, Ning JIANG, Manman XU

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1,   Pages 100-122 doi: 10.1007/s11465-019-0568-4

Abstract: constraint for symmetric structures, and then extend the proposed energy penalization method to an ITO–MMCwith a symmetric constraint.constraint with asymmetric loads.For the ITO–MMC under a bilateral symmetric constraint, the proposed method can reduce the objectiveFor the ITO–MMC under a periodic symmetric constraint, the proposed energy penalization method can dramatically

Keywords： topology optimization     moving morphable component     isogeometric analysis     energy penalization method     symmetricconstraint    

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A total torque index for dynamic performance evaluation of a radial symmetric six-legged robot

Kejia LI, Xilun DING, Marco CECCARELL

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 2,   Pages 219-230 doi: 10.1007/s11465-012-0320-9

Abstract:

This article focuses on the dynamic index and performance of a radial symmetric six-legged robot.

Keywords： six-legged robots     dynamic modeling     performance index    

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Shear stress distribution prediction in symmetric compound channels using data mining and machine learning

Zohreh SHEIKH KHOZANI, Khabat KHOSRAVI, Mohammadamin TORABI, Amir MOSAVI, Bahram REZAEI, Timon RABCZUK

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1097-1109 doi: 10.1007/s11709-020-0634-3

Abstract: Shear stress distribution prediction in open channels is of utmost importance in hydraulic structural engineering as it directly affects the design of stable channels. In this study, at first, a series of experimental tests were conducted to assess the shear stress distribution in prismatic compound channels. The shear stress values around the whole wetted perimeter were measured in the compound channel with different floodplain widths also in different flow depths in subcritical and supercritical conditions. A set of, data mining and machine learning algorithms including Random Forest (RF), M5P, Random Committee, KStar and Additive Regression implemented on attained data to predict the shear stress distribution in the compound channel. Results indicated among these five models; RF method indicated the most precise results with the highest value of 0.9. Finally, the most powerful data mining method which studied in this research compared with two well-known analytical models of Shiono and Knight method (SKM) and Shannon method to acquire the proposed model functioning in predicting the shear stress distribution. The results showed that the RF model has the best prediction performance compared to SKM and Shannon models.

Keywords： compound channel     machine learning     SKM model     shear stress distribution     data mining models    

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Technology and system of constraint programming for industry production scheduling

Yarong CHEN, Zailin GUAN, Yunfang PENG, Xinyu SHAO, Muhammad HASSEB

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 455-464 doi: 10.1007/s11465-010-0106-x

Abstract: The use of techniques and system of constraint programming enables the implementation of precise, flexibleThis paper systematically introduces the constraint modeling and solving technology for production schedulingWe trend of some concrete technology, such as modeling, search, constraint propagation, consistency,and optimization of constraint programming for scheduling problems.application analysis, a generic application framework for real-life scheduling based on commercial constraint

Keywords： constraint programming     production scheduling     constraint propagation     search     consistency     optimization    

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Hierarchical porous carbon derived from one-step self-activation of zinc gluconate for symmetric supercapacitors

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 387-394 doi: 10.1007/s11705-022-2250-3

Abstract: The symmetric supercapacitors assembled by the optimal electrodes exhibit an acceptable rate capabilityMoreover, the symmetric supercapacitors deliver high energy/power densities of 49.8 W∙h∙kg–1NBF4 electrolyte, outperforming the majority of previously reported porous carbon-based symmetric

Keywords： self-activation     zinc organic salts     abundant mesopores     symmetric supercapacitor     liquid electrolyte    

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Recent development in low-constraint fracture toughness testing for structural integrity assessment of

Jidong KANG, James A. GIANETTO, William R. TYSON

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 4,   Pages 546-553 doi: 10.1007/s11465-018-0501-2

Abstract: Such a test provides high constraint and therefore conservative fracture toughness results.However, for girth welds in service, defects are usually subjected to primarily tensile loading where the constraintLow-constraint toughness tests represent more realistic loading conditions for girth weld defects, andIn this review, we present recent developments in low-constraint fracture toughness testing, specifically

Keywords： fracture toughness     constraint effect     single-edge-notched tension test     pipeline     structural integrity assessment    

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Effect of steady shear on multi-axial texture of symmetric diblock copolymers

XU Hui, LIU Honglai, HU Ying

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 26-34 doi: 10.1007/s11705-007-0006-8

Abstract: The effect of steady shear on multi-axial texture of symmetric diblock copolymer was investigated by
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Refined analysis of axi-symmetric circular cylinder in the axial magnetic field without ad hoc assumption

Baosheng ZHAO, Yang GAO, Yingtao ZHAO, Dechen ZHANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 318-323 doi: 10.1007/s11465-011-0232-0

Abstract:

The refined theory for axi-symmetric magnetoelastic circular cylinder is deduced systematically and

Keywords： refined analysis     axially symmetric deformation     circular cylinder     Bessel’s function     axial magnetic field    

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Development of rocking constraint device with vertical damping capacity for three-dimensional base-isolated

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 350-367 doi: 10.1007/s11709-022-0923-0

Abstract: A new rocking constraint device (RCD) is developed for three-dimensional (3D) base-isolated frame structuresinstalled outside the cylinders when the superstructure undergoes translational motion, and rocking constraintTheoretical formulas for calculating the damping and rocking constraint stiffness of the RCD are proposedtests are conducted at different loading frequencies and amplitudes to verify the damping and rocking constraintloading frequency, the average vertical stiffness of the two cylinders, which determines the rocking constraint

Keywords： three-dimensional isolation     rocking behavior     rocking constraint device     replaceable damping component    

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Research on constraint-based virtual assembly technologies

YANG Rundang, WU Dianliang, FAN Xiumin, YAN Juanqi

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 243-249 doi: 10.1007/s11465-007-0043-5

Abstract: To realize a constraint-based virtual assembly operation, the unified representations of the assemblyconstraint, the equivalent relation between the constraint and the degree of freedom (DOF), and theSeveral algorithms about the constraint treatment are submitted.Second, to satisfy the new constraint, according to the positing solving algorithm, the position andExperiments have indicated that these algorithms have well supported constraint treatments in the IVAE

Keywords： movement DOF     recognition algorithm     assembly     orientation     combination    

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Topology optimization of transient problem with maximum dynamic response constraint using SOAR scheme

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 593-606 doi: 10.1007/s11465-021-0636-4

Abstract: for the continuum topology optimization of transient vibration problem with maximum dynamic response constraintaggregated index in the form of an integral function is presented to cope with the maximum response constraint

Keywords： topology optimization     solid isotropic material with penalization     transient response     aggregation function     second-order Arnoldi reduction    

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Fast removal of ocular artifacts from electroencephalogram signals using spatial constraint independent

Bang-hua YANG,Liang-fei HE,Lin LIN,Qian WANG

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 6,   Pages 486-496 doi: 10.1631/FITEE.1400299

Abstract: To remove ocular artifacts from EEG in brain-computer interfaces (BCIs), a method named spatial constraintIn the second stage, first, SCICA applies exact artifact ICs obtained in the first stage as a constraintThese extracted ICs are called spatial constraint ICs (SC-ICs).

Keywords： artifacts     Electroencephalogram (EEG)     Electrooculogram (EOG)     Brain-computer interface (BCI)     Spatial constraint    

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A Study About IC and IR in Principal-gent RelationshipUnder the Engineer Supervision Institution

Qin Xuan

Strategic Study of CAE 2007, Volume 9, Issue 4,   Pages 45-49

Abstract:

According to principal-agent theory, the Incentive compatibility constraint(IC)and the participation constraint (IR) in principal-gent relationship between employer and engineerThe conclusions are drawn:The incentive compatibility constraint (IC) is more important than participationconstraint (IR), If the mechanism doesn't satisfy the needs of IC, then it will be inefficient.

Keywords： engineer supervision     employer     engineer     principal-gent     incentive compatibility constraint(IC)     participationconstraint(IR)    

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Research on the influence of contact surface constraint on mechanical properties of rock-concrete composite

Baoyun ZHAO, Yang LIU, Dongyan LIU, Wei HUANG, Xiaoping WANG, Guibao YU, Shu LIU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 322-330 doi: 10.1007/s11709-019-0594-7

Abstract: The influence of contact surface constraint on the mechanical properties of rock-concrete composite specimensResults show that the stress and strain of rock-concrete composite specimens with contact surface constraintAveragely, compared with composite specimens without the contact surface, the existence of contact surface constraintof the fracture surface, the theory of microcrack development is used to explain the contact surface constraint

Keywords： rock-concrete     composite specimen     contact surface     mechanical properties     failure mechanism    

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risk explicit interval linear programming approach for optimal watershed load reduction with objective-constraint

Pingjian YANG,Feifei DONG,Yong LIU,Rui ZOU,Xing CHEN,Huaicheng GUO

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 129-140 doi: 10.1007/s11783-014-0683-8

Abstract: demonstrate that, by applying the refined REILP, it is possible to obtain solutions that preserve the same constraint

Keywords： refined risk explicit interval linear programming     decision making     objective-constraint uncertainty tradeoff    

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Title Author Date Type Operation

Isogeometric topology optimization based on energy penalization for symmetric structure

Xianda XIE, Shuting WANG, Ming YE, Zhaohui XIA, Wei ZHAO, Ning JIANG, Manman XU

Journal Article

A total torque index for dynamic performance evaluation of a radial symmetric six-legged robot

Kejia LI, Xilun DING, Marco CECCARELL

Journal Article

Shear stress distribution prediction in symmetric compound channels using data mining and machine learning

Zohreh SHEIKH KHOZANI, Khabat KHOSRAVI, Mohammadamin TORABI, Amir MOSAVI, Bahram REZAEI, Timon RABCZUK

Journal Article

Technology and system of constraint programming for industry production scheduling

Yarong CHEN, Zailin GUAN, Yunfang PENG, Xinyu SHAO, Muhammad HASSEB

Journal Article

Hierarchical porous carbon derived from one-step self-activation of zinc gluconate for symmetric supercapacitors

Journal Article

Recent development in low-constraint fracture toughness testing for structural integrity assessment of

Jidong KANG, James A. GIANETTO, William R. TYSON

Journal Article

Effect of steady shear on multi-axial texture of symmetric diblock copolymers

XU Hui, LIU Honglai, HU Ying

Journal Article

Refined analysis of axi-symmetric circular cylinder in the axial magnetic field without ad hoc assumption

Baosheng ZHAO, Yang GAO, Yingtao ZHAO, Dechen ZHANG

Journal Article

Development of rocking constraint device with vertical damping capacity for three-dimensional base-isolated

Journal Article

Research on constraint-based virtual assembly technologies

YANG Rundang, WU Dianliang, FAN Xiumin, YAN Juanqi

Journal Article

Topology optimization of transient problem with maximum dynamic response constraint using SOAR scheme

Journal Article

Fast removal of ocular artifacts from electroencephalogram signals using spatial constraint independent

Bang-hua YANG,Liang-fei HE,Lin LIN,Qian WANG

Journal Article

A Study About IC and IR in Principal-gent RelationshipUnder the Engineer Supervision Institution

Qin Xuan

Journal Article

Research on the influence of contact surface constraint on mechanical properties of rock-concrete composite

Baoyun ZHAO, Yang LIU, Dongyan LIU, Wei HUANG, Xiaoping WANG, Guibao YU, Shu LIU

Journal Article

risk explicit interval linear programming approach for optimal watershed load reduction with objective-constraint

Pingjian YANG,Feifei DONG,Yong LIU,Rui ZOU,Xing CHEN,Huaicheng GUO

Journal Article