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Singularity loci of an orthogonal spherical two-degree-of-freedom parallel mechanism

Jialun YANG, Feng GAO,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 379-385 doi: 10.1007/s11465-009-0075-0

Abstract: Singularity analysis plays an important role in the design of robots, especially for parallel robots.Singularity loci in the joint space and Cartesian space are plotted according to the Jacobin of the mechanismResult shows that the singularity loci at the joint space are two circles and one line, whereas at the

Keywords： 2-DOF orthogonal spherical parallel mechanism     singularity loci     self-motions    

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Comments on “Determination of heterozygosity for avirulence/virulence loci through sexual hybridization

Ralf T. Voegele

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 1,   Pages 121-122 doi: 10.15302/J-FASE-2017142

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Influence of kinematic redundancy on the singularity-free workspace of parallel kinematic machines

Jens KOTLARSKI, Bodo HEIMANN, Tobias ORTMAIER

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 2,   Pages 120-134 doi: 10.1007/s11465-012-0321-8

Abstract:

In this paper the effect of kinematic redundancy in order to reduce the singularity loci of the directkinematics and to increase the operational, i.e., singularity-free, workspace is demonstrated.

Keywords： parallel robots     kinematic redundancy     singularity avoidance     operational workspace    

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Determination of heterozygosity for avirulence/virulence loci through sexual hybridization of

Yuan TIAN,Gangming ZHAN,Xia LU,Jie ZHAO,Lili HUANG,Zhensheng KANG

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 1,   Pages 48-58 doi: 10.15302/J-FASE-2016114

Abstract: was selfed on to determine the heterozygosity for avirulence/virulence loci.indicating that the parental isolate was homozygously avirulent or homozygously virulent for these loci

Keywords： Puccinia striiformis f. sp. tritici     selfing     heterozygosity     virulence inheritance    

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Implementation of sinh method in integration space for boundary integrals with near singularity in potential

Guizhong XIE,Dehai ZHANG,Jianming ZHANG,Fannian MENG,Wenliao DU,Xiaoyu WEN

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 412-422 doi: 10.1007/s11465-016-0396-8

Abstract: However, boundary integrals with near singularity need to be calculated accurately and efficiently toif the location of the projection point is outside the element, where boundary integrals with near singularityResults demonstrate that our method is effective for regularizing the boundary integrals with near singularity

Keywords： computer aided engineering (CAE)     boundary element method (BEM)     near singularity     sinh method     coordinate    

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The nonlinear singularity phenomenon of low frequency oscillation in power system

Ma Jinglan,Wang Wei,Wan Jingsheng,Zhang Yongli

Strategic Study of CAE 2009, Volume 11, Issue 8,   Pages 93-96

Abstract: reason that causes LFO is discussed.With Hopf bifurcation theory, it is analyzed that the nonlinear singularityThe study indicates that because of the Hopf bifurcation, singularity phenomenon in the power system

Keywords： LFO     bifurcation theory     nonlinear     singularity    

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Kinematic, workspace and singularity analysis of a new parallel robot used in minimally invasive surgery

Alin STOICA, Doina PISLA, Szilaghyi ANDRAS, Bogdan GHERMAN, Bela-Zoltan GYURKA, Nicolae PLITEA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 70-79 doi: 10.1007/s11465-013-0365-4

Abstract: An in-depth study of different types of singularity is performed, allowing the development of safe control

Keywords： parallel robot     minimally invasive surgery     kinematics     simulation    

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Singularity and workspace analysis of three isoconstrained parallel manipulators with schoenflies motion

Po-Chih LEE, Jyh-Jone LEE

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 2,   Pages 163-187 doi: 10.1007/s11465-012-0324-5

Abstract: Then, Jacobian matrix, singularity, workspace, and performance index for each mechanism are subsequently

Keywords： parallel manipulator     schoenflies motion     kinematics     singularity     workspace     performance index    

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Genome-wide association analysis reveals genetic loci and candidate genes associated with intramuscular

Xingwang WANG, Rongrong DING, Jianping QUAN, Linxue YANG, Ming YANG, Enqin ZHENG, Dewu LIU, Gengyuan CAI, Zhenfang WU, Jie YANG

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 3,   Pages 335-341 doi: 10.15302/J-FASE-2017152

Abstract: Intramuscular fat (IMF) is a major meat-quality trait in pigs. The content of IMF is directly associated with the taste and flavor of pork. As a complex trait, there could be multiple genes affecting IMF content in pork. Genome-wide association study is a powerful tool to detect genomic regions associated with phenotypic variations. The objectives of the present study were to identify or refine the positions of genomic regions affecting IMF, and to characterize candidate genes and pathways that may influence this trait. Of note, we identified a significant region in longissium dorsi muscle in a Duroc pig population for IMF content with PorcineSNP60 v2 BeadChip. This region spans 1.24 Mb on chromosome 8 and had been identified as a quantitative trait locus for IMF in Pietrain, Large White, Landrace, and Leicoma pigs. In this region, eight SNPs were significantly associated with IMF content. Three genes proximal to these significant SNPs were considered candidate genes, including , and . Our results confirm several previous findings and highlight several genes that may contribute to IMF variation in Duroc pigs.

Keywords： Duroc pigs     genome-wide association analysis     intramuscular fat    

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Finite element analysis of stress concentrations and failure criteria in composite plates with circular holes

Abdelhak KHECHAI,Abdelouahab TATI,Abdelhamid GUETTALA

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3,   Pages 281-294 doi: 10.1007/s11465-014-0307-9

Abstract:

In this study, the stress concentration factors (SCF) in cross-and-angle-ply laminated composite plates as well as in isotropic plates with single circular holes subjected to uniaxial loading is studied. A quadrilateral finite element of four-node with 32 degrees of freedom at each node, previously developed for the bending and mechanical buckling of laminated composite plates, is used to evaluate the stress distribution in laminated composite plates with central circular holes. Based up on the classical plate theory, the present finite element is a combination of a linear isoparametric membrane element and a high precision rectangular Hermitian element. The numerical results obtained by the present element compare favorably with those obtained by the analytic approaches published in literature. It is observed that the obtained results are very close to the reference results, which demonstrates the accuracy of the present element. Additionally, to determine the first ply failure (FPF) of laminated plate, several failure criterions are employed. Finally, to show the effect of ratio on the failure of plates, a number of figures are given for different fiber orientation angles.

Keywords： laminated composite plates     stress concentration     geometric singularity     anisotropic effect    

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Genetic study and molecular breeding for high phosphorus use efficiency in maize

Dongdong LI, Meng WANG, Xianyan KUANG, Wenxin LIU

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 4,   Pages 366-379 doi: 10.15302/J-FASE-2019278

Abstract: Thus, dissecting the genetic architecture of crop PUE, mining related quantitative trait loci (QTL) and

Keywords： maize     phosphorus use efficiency     quantitative trait loci     genetic study     molecular breeding     genomic selection    

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Eversible duoprism mechanism

Ruiming LI,Yan-An YAO

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2,   Pages 159-169 doi: 10.1007/s11465-016-0398-6

Abstract: Six inputs, including a redundant one, are required to overcome singularity and achieve an eversion motion

Keywords： duoprism     eversion motion     singularity     over-constrained    

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Self-motions of 3-RPS manipulators

Josef SCHADLBAUER, Manfred L. HUSTY, Stéphane CARO, Philippe WENGERY

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 62-69 doi: 10.1007/s11465-013-0366-3

Abstract:

Recently a complete kinematic description of the 3-RPS parallel manipulator was obtained using algebraic constraint equations. It turned out that the workspace splits into two components describing two kinematically different operation modes. In this paper the algebraic description is used to give a complete analysis of all possible self-motions of this manipulator in both operation modes. Furthermore it is shown that a transition from one operation mode into the other in a self-motion is possible.

Keywords： 3-RPS-manipulator     singularity     self-motion    

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Design and analysis of Salisbury screens and Jaumann absorbers for solar radiation absorption

Xing FANG, C. Y. ZHAO, Hua BAO

Frontiers in Energy 2018, Volume 12, Issue 1,   Pages 158-168 doi: 10.1007/s11708-018-0542-6

Abstract: Moreover, the analysis of admittance loci has been conducted to directly show the effect of each layer

Keywords： thin films     admittance loci     solar absorber    

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Multifractal characteristics of cylindrical sludge drying

Weiyun WANG, Aimin LI,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 4,   Pages 464-469 doi: 10.1007/s11783-009-0040-5

Abstract: The parameters acquired were used to calculate the multifractal singularity spectrum and indicate the

Keywords： multifractal characteristic     multifractal singularity spectrum     sewage sludge drying    

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Title Author Date Type Operation

Singularity loci of an orthogonal spherical two-degree-of-freedom parallel mechanism

Jialun YANG, Feng GAO,

Journal Article

Comments on “Determination of heterozygosity for avirulence/virulence loci through sexual hybridization

Ralf T. Voegele

Journal Article

Influence of kinematic redundancy on the singularity-free workspace of parallel kinematic machines

Jens KOTLARSKI, Bodo HEIMANN, Tobias ORTMAIER

Journal Article

Determination of heterozygosity for avirulence/virulence loci through sexual hybridization of

Yuan TIAN,Gangming ZHAN,Xia LU,Jie ZHAO,Lili HUANG,Zhensheng KANG

Journal Article

Implementation of sinh method in integration space for boundary integrals with near singularity in potential

Guizhong XIE,Dehai ZHANG,Jianming ZHANG,Fannian MENG,Wenliao DU,Xiaoyu WEN

Journal Article

The nonlinear singularity phenomenon of low frequency oscillation in power system

Ma Jinglan,Wang Wei,Wan Jingsheng,Zhang Yongli

Journal Article

Kinematic, workspace and singularity analysis of a new parallel robot used in minimally invasive surgery

Alin STOICA, Doina PISLA, Szilaghyi ANDRAS, Bogdan GHERMAN, Bela-Zoltan GYURKA, Nicolae PLITEA

Journal Article

Singularity and workspace analysis of three isoconstrained parallel manipulators with schoenflies motion

Po-Chih LEE, Jyh-Jone LEE

Journal Article

Genome-wide association analysis reveals genetic loci and candidate genes associated with intramuscular

Xingwang WANG, Rongrong DING, Jianping QUAN, Linxue YANG, Ming YANG, Enqin ZHENG, Dewu LIU, Gengyuan CAI, Zhenfang WU, Jie YANG

Journal Article

Finite element analysis of stress concentrations and failure criteria in composite plates with circular holes

Abdelhak KHECHAI,Abdelouahab TATI,Abdelhamid GUETTALA

Journal Article

Genetic study and molecular breeding for high phosphorus use efficiency in maize

Dongdong LI, Meng WANG, Xianyan KUANG, Wenxin LIU

Journal Article

Eversible duoprism mechanism

Ruiming LI,Yan-An YAO

Journal Article

Self-motions of 3-RPS manipulators

Josef SCHADLBAUER, Manfred L. HUSTY, Stéphane CARO, Philippe WENGERY

Journal Article

Design and analysis of Salisbury screens and Jaumann absorbers for solar radiation absorption

Xing FANG, C. Y. ZHAO, Hua BAO

Journal Article

Multifractal characteristics of cylindrical sludge drying

Weiyun WANG, Aimin LI,

Journal Article