Search

Your search keyword '"Ding Xiangdong"' showing total 590 results
Start Over Author "Ding Xiangdong" Search Limiters Peer Reviewed
590 results on '"Ding Xiangdong"'

1. Research progress of Mo−Re alloy structural materials usedfor nuclear reactors

Author

ZENG Yi, SUN Yuanjun, AN Geng, DING Xiangdong, QIU Xi, WANG Na, and SUN Jun

Subjects
mo−re alloys, nuclear reactor, structural materials, research progress, Mining engineering. Metallurgy, TN1-997
Abstract

Molybdenum (Mo) as the refractory metals shows the series of advantageous properties, such as high melting point, excellent high temperature mechanical properties, and good thermal conductivity. In addition, the good antiradiation swelling ability and high compatibility with liquid metals make Mo as the important candidate materials for the advanced nuclear reactors to endure the high temperature, strong corrosion, and high-dose irradiation, such as the fourth generation high-temperature nuclear fission reactor and the fusion reactor. Nevertheless, the application of Mo is limited by the brittle nature at low temperature, the difficult machining, and the poor welding performance. Adding rhenium (Re) into molybdenum to form "rhenium effect" can not only significantly improve the room temperature plasticity and the processability of molybdenum and reduce the plastic brittle transition temperature, but also improve the welding performance and creep resistance. Therefore, it has become a research hotspot of structural materials for the advanced nuclear reactors. The research progress of molybdenum−rhenium alloys (Mo−Re) was summarized in this paper from four aspects as composition design, material preparation, welding performance, and nuclear environmental application assessment, and the problems of Mo−Re alloys used for the advanced reactor engineering were analyzed to provide the reference for the development of high-performance molybdenum−rhenium alloy structural materials.

Published
2023
Full Text
View/download PDF

2. Machine learning for predicting ultralow thermal conductivity and high ZT in complex thermoelectric materials

Author

Hao, Yuzhou, Zuo, Yuting, Zheng, Jiongzhi, Hou, Wenjie, Gu, Hong, Wang, Xiaoying, Li, Xuejie, Sun, Jun, Ding, Xiangdong, and Gao, Zhibin

Subjects
Condensed Matter - Materials Science
Abstract

Efficient and precise calculations of thermal transport properties and figure of merit, alongside a deep comprehension of thermal transport mechanisms, are essential for the practical utilization of advanced thermoelectric materials. In this study, we explore the microscopic processes governing thermal transport in the distinguished crystalline material Tl$_9$SbTe$_6$ by integrating a unified thermal transport theory with machine learning-assisted self-consistent phonon calculations. Leveraging machine learning potentials, we expedite the analysis of phonon energy shifts, higher-order scattering mechanisms, and thermal conductivity arising from various contributing factors like population and coherence channels. Our finding unveils an exceptionally low thermal conductivity of 0.31 W m$^{-1}$ K$^{-1}$ at room temperature, a result that closely correlates with experimental observations. Notably, we observe that the off-diagonal terms of heat flux operators play a significant role in shaping the overall lattice thermal conductivity of Tl$_9$SbTe$_6$, where the ultralow thermal conductivity resembles that of glass due to limited group velocities. Furthermore, we achieve a maximum $ZT$ value of 3.17 in the $c$-axis orientation for \textit{p}-type Tl$_9$SbTe$_6$ at 600 K, and an optimal $ZT$ value of 2.26 in the $a$-axis and $b$-axis direction for \textit{n}-type Tl$_9$SbTe$_6$ at 500 K. The crystalline Tl$_9$SbTe$_6$ not only showcases remarkable thermal insulation but also demonstrates impressive electrical properties owing to the dual-degeneracy phenomenon within its valence band. These results not only elucidate the underlying reasons for the exceptional thermoelectric performance of Tl$_9$SbTe$_6$ but also suggest potential avenues for further experimental exploration.

Published
2024
Full Text
View/download PDF

3. Phase transition and polar cluster behavior above Curie temperature in ferroelectric BaTi$_{0.8}$Zr$_{0.2}$O$_3$

Author

Aktas, Oktay, Romero, Francisco Javier, He, Zhengwang, Linyu, Gan, Ding, Xiangdong, Martín-Olalla, José-María, Gallardo, Maria-Carmen, and Lookman, Turab

Subjects
Condensed Matter - Materials Science, Condensed Matter - Other Condensed Matter
Abstract

We study the phase transition behavior of the ferroelectric BaTi$_{0.8}$Zr$_{0.2}$O$_3$ in the paraelectric region. The temperature dependencies of thermal, polar, elastic and dielectric properties indicate the presence of local structures above the paraelectric-ferroelectric transition temperature Tc = 292 K. The non-zero remnant polarization is measured up to a characteristic temperature T* ~350 K, which coincides with the temperature where the dielectric constant deviates from Curie-Weiss law. Resonant Piezoelectric Spectroscopy shows that DC field-cooling above Tc using fields smaller than the coercive field leads to an elastic response and remnant piezoelectricity below T*, which likely corresponds to the coherence temperature associated with polar nanostructures in ferroelectrics. The observed remnant effect is attributed to the reorientation of polar nanostructures above Tc., Comment: Accepted version in Applied Physics Letters. 13 pages; 4 figures. (Supp Material in version 1)

Published
2024
Full Text
View/download PDF

4. Anomalous thermal conductivity in 2D silica nanocages of immobilizing noble gas atom

Author

Wang, Yang, Gao, Zhibin, Wang, Xiaoying, Sun, Jinping, Feng, Minxuan, Hao, Yuzhou, Li, Xuejie, Zhao, Yinchang, and Ding, Xiangdong

Subjects
Condensed Matter - Materials Science, Physics - Computational Physics
Abstract

Noble gas atoms such as Kr and Xe are byproducts of nuclear fission in nuclear plants. How to trap and confine these volatile even radioactive gases is particularly challenging. Recent studies have shown that they can be trapped in nanocages of ultrathin silica. Here, we exhibit with self-consistent phonon theory and four-phonon (4ph) scattering where the adsorption of noble gases results in an anomalous increase in lattice thermal conductivity, while the presence of Cu atoms doping leads to a reduction in lattice thermal conductivity. We trace this behavior in host-guest 2D silica to an interplay of tensile strain, rattling phonon modes, and redistribution of electrons. We also find that 4ph scatterings play indispensable roles in the lattice thermal conductivity of 2D silica. Our work illustrates the microscopic heat transfer mechanism in 2D silica nanocages with the immobilization of noble gas atoms and inspires further exploring materials with the kagome and glasslike lattice thermal conductivity., Comment: 7 pages, 4 figures

Published
2024
Full Text
View/download PDF

12. Tissues Expression, Polymorphisms Identification of FcRn Gene and Its Relationship with Serum Classical Swine Fever Virus Antibody Level in Pigs

Author

Liu Yang, Wang Chonglong, Liu Zhengzhu, Xu Jingen, Fu Weixuan, Wang Wenwen, Ding Xiangdong, Liu Jianfeng, and Zhang Qin

Subjects
Pig, FcRn, Anti-CSFV, Expression, Polymorphism, Association, Animal culture, SF1-1100, Animal biochemistry, QP501-801
Abstract

Neonatal Fc receptor (FcRn) gene encodes a receptor that binds the Fc region of monomeric immunoglobulin G (IgG) and is responsible for IgG transport and stabilization. In this report, the 8,900 bp porcine FcRn genomic DNA structure was identified and putative FcRn protein included 356 amino acids. Alignment and phylogenetic analysis of the porcine FcRn amino acid sequences with their homologies of other species showed high identity. Tissues expression of FcRn mRNA was detected by real time quantitative polymerase chain reaction (Q-PCR), the results revealed FcRn expressed widely in ten analyzed tissues. One single nucleotide polymorphism (SNP) (HQ026019:g.8526 C>T) in exon6 region of porcine FcRn gene was demonstrated by DNA sequencing analysis. A further analysis of SNP genotypes associated with serum Classical Swine Fever Virus antibody (anti-CSFV) concentration was performed in three pig populations including Large White, Landrace and Songliao Black pig (a Chinese indigenous breed). Our results of statistical analysis showed that the SNP had a highly significant association with the level of anti-CSFV antibody (At d 20; At d 35) in serum (p = 0.008; p = 0.0001). Investigation of expression and polymorphisms of the porcine FcRn gene will help us in further understanding the molecular basis of the antibody regulation pathway in the porcine immune response. All these results indicate that FcRn gene might be regarded as a molecular marker for genetic selection of anti-CSFV antibody level in pig disease resistance breeding programmes.

Published
2012
Full Text
View/download PDF

13. A compendium of genetic regulatory effects across pig tissues

Author

Teng, Jinyan, Gao, Yahui, Yin, Hongwei, Bai, Zhonghao, Liu, Shuli, Zeng, Haonan, Bai, Lijing, Cai, Zexi, Zhao, Bingru, Li, Xiujin, Xu, Zhiting, Lin, Qing, Pan, Zhangyuan, Yang, Wenjing, Yu, Xiaoshan, Guan, Dailu, Hou, Yali, Keel, Brittney N., Rohrer, Gary A., Lindholm-Perry, Amanda K., Oliver, William T., Ballester, Maria, Crespo-Piazuelo, Daniel, Quintanilla, Raquel, Canela-Xandri, Oriol, Rawlik, Konrad, Xia, Charley, Yao, Yuelin, Zhao, Qianyi, Yao, Wenye, Yang, Liu, Li, Houcheng, Zhang, Huicong, Liao, Wang, Chen, Tianshuo, Karlskov-Mortensen, Peter, Fredholm, Merete, Amills, Marcel, Clop, Alex, Giuffra, Elisabetta, Wu, Jun, Cai, Xiaodian, Diao, Shuqi, Pan, Xiangchun, Wei, Chen, Li, Jinghui, Cheng, Hao, Wang, Sheng, Su, Guosheng, Sahana, Goutam, Lund, Mogens Sandø, Dekkers, Jack C. M., Kramer, Luke, Tuggle, Christopher K., Corbett, Ryan, Groenen, Martien A. M., Madsen, Ole, Gòdia, Marta, Rocha, Dominique, Charles, Mathieu, Li, Cong-jun, Pausch, Hubert, Hu, Xiaoxiang, Frantz, Laurent, Luo, Yonglun, Lin, Lin, Zhou, Zhongyin, Zhang, Zhe, Chen, Zitao, Cui, Leilei, Xiang, Ruidong, Shen, Xia, Li, Pinghua, Huang, Ruihua, Tang, Guoqing, Li, Mingzhou, Zhao, Yunxiang, Yi, Guoqiang, Tang, Zhonglin, Jiang, Jicai, Zhao, Fuping, Yuan, Xiaolong, Liu, Xiaohong, Chen, Yaosheng, Xu, Xuewen, Zhao, Shuhong, Zhao, Pengju, Haley, Chris, Zhou, Huaijun, Wang, Qishan, Pan, Yuchun, Ding, Xiangdong, Ma, Li, Li, Jiaqi, Navarro, Pau, Zhang, Qin, Li, Bingjie, Tenesa, Albert, Li, Kui, Liu, George E., Zhang, Zhe, and Fang, Lingzhao

Published
2024
Full Text
View/download PDF

14. Haplotype kinship for three populations of the Goettingen minipig

Author

Simianer Henner, Täubert Helge, Ding Xiangdong, Weigend Steffen, and Flury Christine

Subjects
genetic diversity, short term phylogeny, kinship, haplotype kinship, identity by descent, Animal culture, SF1-1100, Genetics, QH426-470
Abstract

Abstract To overcome limitations of diversity measures applied to livestock breeds marker based estimations of kinship within and between populations were proposed. This concept was extended from the single locus consideration to chromosomal segments of a given length in Morgan. Algorithms for the derivation of haplotype kinship were suggested and the behaviour of marker based haplotype kinship was investigated theoretically. In the present study the results of the first practical application of this concept are presented. Full sib pairs of three sub-populations of the Goettingen minipig were genotyped for six chromosome segments. After haplotype reconstruction the haplotypes were compared and mean haplotype kinships were estimated within and between populations. Based on haplotype kinships a distance measure is proposed which is approximatively linear with the number of generations since fission. The haplotype kinship distances, the respective standard errors and the pedigree-based expected values are presented and are shown to reflect the true population history better than distances based on single-locus kinships. However the marker estimated haplotype kinship reveals variable among segments. This leads to high standard errors of the respective distances. Possible reasons for this phenomenon are discussed and a pedigree-based approach to correct for identical haplotypes which are not identical by descent is proposed.

Published
2007
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results