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147 results on '"Zheng, Y. F."'

1. Temporal diagnostics of femtosecond electron bunches with complex structures using sparsity-based algorithm

Author

Su, Q. Q., Hua, J. F., Nie, Z., Ma, Y., Liu, S., Zheng, Y. F., Pai, C. -H., and Lu, W.

Subjects
Physics - Accelerator Physics
Abstract

Femtosecond electron bunches with complex temporal structures play a crucial role in THz generation, free-electron lasers and plasma wakefield accelerators. The ultrashort electron pulse duration can be reconstructed from the coherent transition radiation (CTR) spectrum based on prior knowledge. A weighted greedy sparse phase retrieval (WGESPAR) algorithm is developed to reduce the ambiguities for reconstructing the distribution of the beam current. This algorithm achieves better performance than iterative algorithms, especially for truncated noisy spectra of multibunch structures. Based on the WGESPAR algorithm, the complex temporal structures of femtosecond electron bunches generated from laser wakefield accelerators can be successfully reconstructed.

Published
2018
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15. Study on breeding for crop fine varieties rich in food factors and their functions

Author

Zheng, J.-G., primary, Lin, J.-K., additional, Cheng, Z.-X., additional, Xu, M., additional, Huang, Z.-W., additional, Yang, Z.-J., additional, Chen, T.-S., additional, Zheng, B.-D., additional, Zheng, Y.-F., additional, Huang, K., additional, Zheng, S.-Q., additional, Chen, X.-Y., additional, Wang, J.-Y., additional, Ye, X.-F., additional, Yuan, D.-S., additional, Zheng, K.-B., additional, Liao, S.-F., additional, Lin, J.-C., additional, Chen, L.-H., additional, Tang, X.-F., additional, and Zhang, T., additional

Published
2020
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27. In Vitro and In Vivo Antibacterial Activities of Patchouli Alcohol, a Naturally Occurring Tricyclic Sesquiterpene, against Helicobacter pylori Infection

Author

Xu, Y. F., primary, Lian, D. W., additional, Chen, Y. Q., additional, Cai, Y. F., additional, Zheng, Y. F., additional, Fan, P. L., additional, Ren, W. K., additional, Fu, L. J., additional, Li, Y. C., additional, Xie, J. H., additional, Cao, H. Y., additional, Tan, B., additional, Su, Z. R., additional, and Huang, P., additional

Published
2017
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31. Magnetic Properties and Structural Phase Transformations of NiMnGa Alloys

Author

Wang, W. H., Hu, F. X., Chen, J. L., Li, Y. X., Wang, Z., Gao, Z. Y., Zheng, Y. F., Zhao, L. C., Wu, G. H., and Zan, W. S.

Subjects
Alloys -- Analysis, Crystals -- Magnetic properties, Business, Electronics, Electronics and electrical industries
Abstract

The magnetic properties and structural phase transformations of Heusler alloys [Ni.sub.2+x][Mn.sub.1-x]Ga and [Ni.sub.2-x][Mn.sub.1+x/2][Ga.sub.1+x/2] were investigated. It was found that the martensitic transformation temperature increases and the Curie temperature decreases with decreasing Mn concentration in the [Ni.sub.2+x][Mn.sub.1-x]Ga system, but the magnetic properties decrease faster than those do in the [Ni.sub.2-x][Mn.sub.1+x/2][Ga.sub.1+x/2] system. It suggests that the influence of the conduction electron concentration and the distance between Mn atoms on the Curie temperature is stronger than the magnetic dilution effect. The martensitic transformation temperature shows a peak value at x = 0.06 in the [Ni.sub.2-x][Mn.sub.1+x/2][Ga.sub.1+x/2] system. A large stress-free magnetic-field-induced strain (MFIS) of 1.8% has been obtained at room temperature in a single crystal sample with the composition in the first system. Index Terms--Magnetic-field-induced strain, magnetic properties, phase transformation.

Published
2001

37. Platinum(II) and palladium(II) complexes with 2-Acetyl pyridine 4N-ethyl thiosemicarbazone able to overcome the cis-Platin resistance. Structure, antibacterial activity and DNA strand breakage

Author

Kovala-Demertzi, D., Demertzis, M. A., Filiou, E., Pantazaki, A. A., Yadav, P. N., Miller, J. R., Zheng, Y. F., and Kyriakidis, D. A.

Subjects
crystal structure, in vitro antibacterial study, palladium(ii) complexes, spectral properties, antitumor-activity, pd(ii), in vitro DNA alterations, platinum(ii), reductase, thiosemicarbazonato complexes, crystal-structure, cytotoxic activity, metal-complexes
Abstract

The reactions of Pd(II) and Pt(II) with 2-Acetyl Pyridine N(4)-Ethyl-Thiosemicarbazones, HAc4Et and 2-Acetyl Pyridine N(4)-1-(2-pyridyl)-piperazinyl Thiosemicarbazone, HAc4PiPiz and 2-Formyl Pyridine N(4)-1-(2-pyridyl)-piperazinyl Thiosemicarbazone, HFo4PiPiz afforded the complexes, [Pd(Ac4Et)], 1, [Pd( HAc4Et)(2)] Cl-2, 2 and [Pd(Ac4Et)(2)], 3 [Pt(Ac4Et)], 4, [Pt(HAc4Et)(2)] Cl-2, 5,[Pt(Ac4Et)(2)], 6 and [Pd(Fo4PipePiz)Cl], 7, [Pd(Fo4PipePiz)(2)], 8, [Pd(Ac4PipePiz)Cl], 9 and [Pd(Ac4PipePiz)(2)], 10. The crystal structure of the complex [Pt(Ac4Et)(2)], 6 has been solved. The platinum( II) atom is in a square planar environment surrounded by two cis nitrogen atoms and two cis sulfur atoms. The ligands are not equivalent, one being tridentate with (N, N, S) donation, the other being monodentate using only the sulfur atom to coordinate to the metal. The tridentate ligand shows a Z, E, Z configuration while the monodentate ligand shows an E, E, Z. Inter-molecular hydrogen bonds stabilize the structure, while the crystal packing is determined by pi - pi, and Pt - C interactions. The antibacterial effect of Pd(II) and Pt(II) complexes were studied in vitro. The complexes were found to have effect on Gram(+) bacteria, while the same complexes showed no bactericidal effect on Gram(+) bacteria. The effect of the Pd(II) and Pt(II) complexes on the in vitro DNA strand breakage was studied by agarose gel electrophoresis. The complexes 1-6 were found to exhibit a cytotoxic potency in a very low micromolar range and to be able to overcome the cisplatin resistance of A2780/Cp8 cells (Kovala-Demertzi et al. 2000). Biometals

Published
2003

38. Quantitative trait loci controlling steamed-rice shape in a recombinant inbred population

Author

Dong, Y. J., Zheng, Y. F., Tsuzuki, E., and Terao, H.

Subjects
Quantitative trait loci, Inbred lines, Genetic markers, Restriction fragment length polymorphism, Recombination, Chromosomes
Abstract

This article 'Quantitative trait loci controlling steamed-rice shape in a recombinant inbred population' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on the research reported.

Published
2002
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43. Development and GC-MS Validation of a Highly Sensitive Recombinant G6PDH-Based Homogeneous Immunoassay for the Detection of Buprenorphine and Norbuprenorphine in Urine

Author

Wang, G., primary, Vincent, M., additional, Rodrigues, W., additional, Agrawal, A., additional, Moore, C., additional, Barhate, R., additional, Abolencia, E., additional, Coulter, C., additional, Soares, J., additional, Zheng, Y.-F., additional, Taylor, C., additional, and Morjana, N., additional

Published
2007
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