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A regularization scheme for explicit level-set XFEM topology optimization

Markus J. GEISS, Jorge L. BARRERA, Narasimha BODDETI, Kurt MAUTE

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 2,   Pages 153-170 doi: 10.1007/s11465-019-0533-2

Abstract: Regularization of the level-set (LS) field is a critical part of LS-based topology optimization (TO)Traditionally this is achieved by advancing the LS field through the solution of a Hamilton-Jacobi equationThis paper introduces a novel LS regularization approach based on a signed distance field (SDF) which

Keywords： level-set regularization     explicit level-sets     XFEM     CutFEM     topology optimization     heat method     signed distancefield     nonlinear structural mechanics     fluid mechanics    

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A distributed variable density path search and simplification method for industrial manipulators with end-effector’s attitude constraints Research Article

Jin WANG, Shengjie LI, Haiyun ZHANG, Guodong LU, Yichang FENG, Peng WANG, Jituo LI,dwjcom@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 4,   Pages 536-552 doi: 10.1631/FITEE.2200353

Abstract: In many robot operation scenarios, the end-effector’s of movement are indispensable for the task process, such as robotic welding, spraying, handling, and stacking. Meanwhile, the inverse kinematics, collision detection, and space search are involved in the procedure under , making it difficult to achieve satisfactory efficiency and effectiveness in practice. To address these problems, we propose a distributed variable density method with (DVDP-AC) for . First, a position– reconstruction (PACR) approach is proposed in the inverse kinematic solution. Then, the (DSDF) model with single-step safety sphere (SSS) is designed to improve the efficiency of collision detection. Based on this, the variable density path search method is adopted in the Cartesian space. Furthermore, a novel forward sequential (FSPS) approach is proposed to adaptively eliminate redundant path points considering path accessibility. Finally, experimental results verify the performance and effectiveness of the proposed DVDP-AC method under end-effector’s , and its characteristics and advantages are demonstrated by comparison with current mainstream methods.

Keywords： Path planning     Industrial robots     Distributed signed-distance-field     Attitude constraints     Path simplification    

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Improved directional-distance filter

JIN Lianghai, LI Dehua

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 205-211 doi: 10.1007/s11465-008-0025-2

Abstract: This paper proposes a new spatial-distance weighting function.By combining the weighting function and the traditional directional-distance filter (DDF) in a novelway, a new vector filter - the adaptive distance-weighted directional-distance filter (ADWDDF) - is presented

Keywords： information     distance-weighted directional-distance     ADWDDF     traditional DDF     spatial-distance weighting    

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Application and evaluation of optical distance measurements in geometrical quality testing of microgears

Albert ALBERS, Duotai PAN, Leif MARXEN, Claudia BECKE,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 261-269 doi: 10.1007/s11465-010-0100-3

Abstract: Microgears are increasingly important in industry. Compared to normal gears, the quality assurance of microgears needs more accurately measured data and simple but feasible measurement methods because of their dimension particula

Keywords： microgear     optical distance measurement     profile deviation     CWL sensor     micromechanical technology (MMT)    

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New method of fault diagnosis of rotating machinery based on distance of information entropy

Houjun SU, Tielin SHI, Fei CHEN, Shuhong HUANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 249-253 doi: 10.1007/s11465-011-0124-3

Abstract: feature index monitoring and diagnosing the vibration fault of rotating machinery, which is called distanceThe mathematic deduction suggests that the conception of distance of information entropy is accordantThen, the accuracy of rotor fault diagnosis can be improved through the curve chart of the distance of

Keywords： rotating machinery     information fusion     fault diagnosis     Information entropy     distance of the information    

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Efficient utilization of wind power: Long-distance transmission or local consumption?

Yuanzhang SUN, Xiyuan MA, Jian XU, Yi BAO, Siyang LIAO

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 440-455 doi: 10.1007/s11465-017-0440-3

Abstract: Excess wind power produced in wind-intensive areas is normally delivered to remote load centers via long-distanceThis paper presents a comparison between long-distance transmission, which has gained popularity, andFirst, the challenges and solutions to the long-distance transmission and local consumption of wind power

Keywords： wind power     long-distance transmission     local consumption     supermicrogrid    

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Cracking resistance performance of super vertical-distance pumped SFRC

JIANG Jinyang, SUN Wei, ZHANG Yunsheng, CHEN Cuicui, WANG Jing

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2,   Pages 179-183 doi: 10.1007/s11709-008-0018-6

Abstract: The mix ratio of steel fiber reinforced concrete (SFRC) was optimized using the principles that workability must meet the pumping demand and anti-cracking performance should be optimal. The effect of SFRC on the initial cracking load, the ultimate load and the crack width of the reinforced concrete (RC) member were analyzed in this paper. It was found that the admixture had good preservation of moisture and adhesion and the fibers distributed homogeneously in one hour out of the machine. According to the pumping results, the SFRC could be pumped vertically up to 306 m. Based on the standard computation formula of cracks, the maximum crack width of an RC member with 0.8% steel fiber (by volume) is about 32% lower than that of standard RC member. Through an experimental research on full-scale model tests for the steel and concrete composite anchorage zone on a pylon, the SFRC not only remarkably increases the crack resistance and the ultimate load, but the initial load also improves 33% approximately. It is also indicated that plastic shrinkage cracking of SFRC in which volume fraction of steel fibers is 0.8% can be restrained obviously and the unrestrained drying shrinkage can be diminished by about 50% at early age. The results confirmed that the SFRC can lessen the shrinkage crack of concrete and enhance markedly the direct tensile strength. Therefore, the SFRC can solve the key question of crack resistance for the anchorage zone of a bridge tower.
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Variable eccentric distance-based tool path generation for orthogonal turn-milling

Fangyu PENG,Wei WANG,Rong YAN,Xianyin DUAN,Bin LI

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4,   Pages 352-366 doi: 10.1007/s11465-015-0361-y

Abstract: proposes an algorithm for maximizing strip width in orthogonal turn-milling based on variable eccentric distanceThe optimized model for maximum machining strip width is formulated by adopting a variable eccentric distanceHausdorff distance and Fréchet distance are introduced in this study to implement the constraint

Keywords： orthogonal turn-milling     variable eccentric distance     local cutting profile     machining strip-width maximization    

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Equitableness to long-distance of disaster reduction systems

Yao Qinglin

Strategic Study of CAE 2009, Volume 11, Issue 6,   Pages 153-158

Abstract:

The equitableness to long-distance of the disaster reduction aims atby partition and deformation of the territory, localization of the center and the corresponding long-distanceachieving-degree of the technical indexes in a weaker condition can be improved.The equitableness to long-distancecan remedy system's flaw by the long-distance mechanism or construct the complete system in an incomplete

Keywords： equitableness to long-distance     disaster reduction     management     earthquake    

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Impact of distance between two hubs on the network coherence of tree networks

李达权,孙伟刚,胡鸿翔

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 9,   Pages 1349-1356 doi: 10.1631/FITEE.2200400

Abstract: We study the impact of the distance between two hubs on network coherence defined by Laplacian eigenvaluesTo obtain an exact determination of coherence based on the distance, we choose a family of tree networksWe then demonstrate that a shorter distance and a larger difference in the degrees of the two hubs leadWith the same network size and distance, the best coherence occurs in the tree with the largest difference

Keywords： Consensus     Coherence     Distance     Average path length    

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Control measuring technique of long distance only head driving in shield tunnel

Xu Weiqing,Han Fuzhong

Strategic Study of CAE 2010, Volume 12, Issue 12,   Pages 56-58

Abstract:

The only head driving distance of the engineering of Beijing underground

Keywords： shield     long distance     only head driving     control measuring    

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Recent progress in electric-field assisted combustion: a brief review

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 883-899 doi: 10.1007/s11708-021-0770-z

Abstract: Among the combustion technologies, electric-field assisted combustion is an advanced techno-logy thatIn the last two decades, tremendous efforts have been made to understand electric-field assisted combustionThese findings significantly facilitate the application of electric-field assisted combustion.

Keywords： electric field     combustion     flame stabilization     emission reduction     flame propagation    

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A MATLAB code for the material-field series-expansion topology optimization method

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 607-622 doi: 10.1007/s11465-021-0637-3

Abstract: This paper presents a MATLAB implementation of the material-field series-expansion (MFSE) topo-logy optimizationThe MFSE method uses a bounded material field with specified spatial correlation to represent the structuralWith the series-expansion method for bounded fields, this material field is described with the characteristic

Keywords： MATLAB implementation     topology optimization     material-field series-expansion method     bounded materialfield     dimensionality reduction    

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An autonomous miniature wheeled robot based on visual feedback control

CHEN Haichu

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 197-200 doi: 10.1007/s11465-007-0033-7

Abstract: The robot takes advantage of the Bluetooth technology to wirelessly transmit data at a short distance

Keywords： measuring     distance     autonomous locomotion     advantage     navigation    

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Spatiotemporal distance embedded hybrid ant colony algorithm for a kind of vehicle routing problem with Research Article

Zhenhui FENG, Renbin XIAO,feng_zh@hust.edu.cn,rbxiao@hust.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 7,   Pages 1062-1079 doi: 10.1631/FITEE.2200585

Abstract: To solve the scheduling model more accurately, a spatiotemporal distance representation function is definedbased on the temporal and spatial properties of the customer, and a spatiotemporal distance embeddedFirst, through spatiotemporal clustering, the spatiotemporal distance between users is the main measure

Keywords： Vehicle routing problem with constraints (VRPC)     Spatiotemporal distance function     Labor division strategy    

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Title Author Date Type Operation

A regularization scheme for explicit level-set XFEM topology optimization

Markus J. GEISS, Jorge L. BARRERA, Narasimha BODDETI, Kurt MAUTE

Journal Article

A distributed variable density path search and simplification method for industrial manipulators with end-effector’s attitude constraints

Jin WANG, Shengjie LI, Haiyun ZHANG, Guodong LU, Yichang FENG, Peng WANG, Jituo LI,dwjcom@zju.edu.cn

Journal Article

Improved directional-distance filter

JIN Lianghai, LI Dehua

Journal Article

Application and evaluation of optical distance measurements in geometrical quality testing of microgears

Albert ALBERS, Duotai PAN, Leif MARXEN, Claudia BECKE,

Journal Article

New method of fault diagnosis of rotating machinery based on distance of information entropy

Houjun SU, Tielin SHI, Fei CHEN, Shuhong HUANG

Journal Article

Efficient utilization of wind power: Long-distance transmission or local consumption?

Yuanzhang SUN, Xiyuan MA, Jian XU, Yi BAO, Siyang LIAO

Journal Article

Cracking resistance performance of super vertical-distance pumped SFRC

JIANG Jinyang, SUN Wei, ZHANG Yunsheng, CHEN Cuicui, WANG Jing

Journal Article

Variable eccentric distance-based tool path generation for orthogonal turn-milling

Fangyu PENG,Wei WANG,Rong YAN,Xianyin DUAN,Bin LI

Journal Article

Equitableness to long-distance of disaster reduction systems

Yao Qinglin

Journal Article

Impact of distance between two hubs on the network coherence of tree networks

李达权,孙伟刚,胡鸿翔

Journal Article

Control measuring technique of long distance only head driving in shield tunnel

Xu Weiqing,Han Fuzhong

Journal Article

Recent progress in electric-field assisted combustion: a brief review

Journal Article

A MATLAB code for the material-field series-expansion topology optimization method

Journal Article

An autonomous miniature wheeled robot based on visual feedback control

CHEN Haichu

Journal Article

Spatiotemporal distance embedded hybrid ant colony algorithm for a kind of vehicle routing problem with

Zhenhui FENG, Renbin XIAO,feng_zh@hust.edu.cn,rbxiao@hust.edu.cn

Journal Article