Search results

1

Decoupling control for permanent magnet in-wheel motor using internal model control based on back-propagation neural network inverse system

100%

Li Y., Zhang B., Xu X.

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2018

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issue 6

2

Elastic Properties, Mechanical Stability, and State Densities of Aluminnides

100%

Zhang B., Jia Z., Duan X., Jia Z.

Acta Physica Polonica A

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2013

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vol. 123

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issue 4

668-672

EN

First-principles calculations were performed to study on alloying stability, electronic structure, and mechanical properties of Al-based intermetallic compounds. The results show that the lattice parameters obtained after full relaxation of crystalline cells are consistent with experimental data. The calculation of cohesive energies indicated that the structure stability of these Al-based intermetallics will become higher with increasing Zr element in crystal. The calculations of formation energies showed that AlCu_2Zr has the strongest alloying ability, followed by AlZr_3 and finally the AlCu_3. Further analysis finds out that single-crystal elastic constants at zero-pressure satisfy the requirement of mechanical stability for cubic crystals. The calculations on the ratio of bulk modulus to shear modulus reveal that AlCu_2Zr can exhibit a good ductility, followed by AlCu_3, whereas AlZr_3 can have a poor ductility; however, for stiffness, these intermetallics show a converse order. The calculations on Poisson's ratio show that AlCu_3 is much more anisotropic than the other two intermetallics. In addition, calculations on densities of states indicates that the valence bonds of these intermetallics are attributed to the valence electrons of Cu 3d states for AlCu_3, Cu 3d and Zr 4d states for AlCu_2Zr, and Al 3s, Zr 5s and 4d states for AlZr_3, respectively; in particular, the electronic structure of the AlZr_3 shows the strongest hybridization, leading to the worst ductility.

3

Theoretical Studies on the Local Structure and Spin Hamiltonian Parameters for Single Cu²⁺ Ion in BaF₂

88%

Lin J., Xiao P., Zhao Y., Zhang B., Yang Y.

Acta Physica Polonica A

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2016

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vol. 129

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issue 6

1173-1177

EN

The spin Hamiltonian parameters (g-factors and the hyperfine structure constants) and local structure are theoretically studied for single Cu²⁺ ion in BaF₂ from the high-order perturbation formulae of these parameters for 3d⁹ ions in tetragonally elongated octahedra. In the calculations, the ligand orbital and spin-orbit coupling of the impurity Cu²⁺ are taken into account, based on the cluster approach. Due to the Jahn-Teller effect and size mismatching substitution, the impurity Cu²⁺ is found to be located at a distance of about 0.2 Å from the nearest fluorine plane. The signs of the hyperfine structure constants A_∥ and A_⊥ are suggested. The theoretical spin Hamiltonian parameters based on the above local structure are in good agreement with the observed values.

4

Measurement of the Indentation Modulus and the Local Internal Friction in Amorphous SiO2 Using Atomic Force Acoustic Microscopy

76%

Zhang B., Wagner H., Büchsenschütz-Göbeler M., Luo Y., Küchemann S., Arnold W., Samwer K.

Archives of Metallurgy and Materials

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2016

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issue 1

5

A novel single-nucleotide polymorphism of the visfatin gene and its associations with performance traits in the chicken

52%

Han R.-L., Lan X.-Y., Zhang L.-Z., Ren G., Jing Y.-J., Li M.-J., Zhang B., Zhao M., Guo Y.-K., Kang X.-T., Chen H.

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vol. 51

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issue 1

59-65

EN

Visfatin is a peptide that is predominantly expressed in visceral adipose tissue and is hypothesized to be related to obesity and insulin resistance. In this study, a novel silent single-nucleotide polymorphism (SNP) was found in exon 7 of the chicken visfatin gene (also known as PBEF1) by single-stranded conformation polymorphism (SSCP) and DNA sequencing. In total, 836 chickens forming an F2 resource population of Gushi chicken crossed with Anka broiler were genotyped by XbaI forced RFLP, and the associations of this polymorphism with chicken growth, carcass characteristics, and meat quality were analyzed. Significant associations were found between the polymorphism and 4-week body weight (BW4), 6-week body weight (BW6), 4-week body slanting length (BSL4), fat bandwidth (FBW), breast muscle water loss rate (BWLR) and breast muscle fiber density (BFD) (P < 0.05), as well as 4-week breastbone length (BBL4) (P < 0.01). These observations suggested that the polymorphism in exon7 of the visfatin gene had significant effects on the early growth traits of chicken.

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Decoupling control for permanent magnet in-wheel motor using internal model control based on back-propagation neural network inverse system

Elastic Properties, Mechanical Stability, and State Densities of Aluminnides

Theoretical Studies on the Local Structure and Spin Hamiltonian Parameters for Single Cu²⁺ Ion in BaF₂

Measurement of the Indentation Modulus and the Local Internal Friction in Amorphous SiO2 Using Atomic Force Acoustic Microscopy

A novel single-nucleotide polymorphism of the visfatin gene and its associations with performance traits in the chicken