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230 results on '"Feng, Yuan‐Yuan"'

13. Stereo Track Blocks Coding System with Rotational Invariance

Author

ZHOU Jia-li, FENG Yuan-yuan, WU Min, WU Chao

Subjects
classification coding, stereo track block, two-dimensional function, phase correlation algorithm, Computer software, QA76.75-76.765, Technology (General), T1-995
Abstract

Because the purpose and object of coding problem are different,it is necessary to make adjustments according to diffe-rent problems.For the coding problem of track blocks,a method of representing them by two-dimensional function is proposed,and track blocks are recognized by phase correlation.Firstly,track block is expanded under the two-dimensional polar coordinate system,and it is expressed as a two-dimensional discrete function.Due to the rotational invariance of the track block,the representation of track blocks is not unique,and a parameter matrix is introduced to specify a normal representation.Secondly,the phase correlation algorithm is used to measure the similarity of two track blocks.Finally,according to basic tracks in the block and their relative position,track block is compressed and encoded out of the representation of two-dimensional discrete function.Experiments show that our method has better expression of internal spatial structure and rotational invariance,and it is more extendable than the traditional coding methods.The solution of coding and matching problem is more adaptable for track blocks building and optimizing.

Published
2021
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22. Data from hPCL3s Promotes Hepatocellular Carcinoma Metastasis by Activating β-Catenin Signaling

Author

Cai, Zhen, primary, Qian, Zhen-Yu, primary, Jiang, Hao, primary, Ma, Ning, primary, Li, Zhi, primary, Liu, Li-Yu, primary, Ren, Xin-Xin, primary, Shang, Yu-Rong, primary, Wang, Jing-Jing, primary, Li, Jing-Jing, primary, Liu, Dong-Ping, primary, Zhang, Xiu-Ping, primary, Feng, Dan, primary, Ni, Qian-Zhi, primary, Feng, Yuan-Yuan, primary, Li, Nan, primary, Zhou, Xiao-Yan, primary, Wang, Xiang, primary, Bao, Ying, primary, Zhang, Xue-Li, primary, Deng, Yue-Zhen, primary, and Xie, Dong, primary

Published
2023
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23. Supplemental Information from hPCL3s Promotes Hepatocellular Carcinoma Metastasis by Activating β-Catenin Signaling

Author

Cai, Zhen, primary, Qian, Zhen-Yu, primary, Jiang, Hao, primary, Ma, Ning, primary, Li, Zhi, primary, Liu, Li-Yu, primary, Ren, Xin-Xin, primary, Shang, Yu-Rong, primary, Wang, Jing-Jing, primary, Li, Jing-Jing, primary, Liu, Dong-Ping, primary, Zhang, Xiu-Ping, primary, Feng, Dan, primary, Ni, Qian-Zhi, primary, Feng, Yuan-Yuan, primary, Li, Nan, primary, Zhou, Xiao-Yan, primary, Wang, Xiang, primary, Bao, Ying, primary, Zhang, Xue-Li, primary, Deng, Yue-Zhen, primary, and Xie, Dong, primary

Published
2023
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37. Fe-Based Metal–Organic Framework-Ni3S2 Heterostructure Nanocomposites for Efficient Oxygen Evolution Reaction at High Current Densities.

Author

Wang, Xiang-Yu, Zhu, Meng, Bian, Qing-Nan, Guo, Ben-Shuai, Kong, Wei-Qing, Wang, Chong-Bin, and Feng, Yuan-Yuan

Abstract

Hydrogen, carrying a high energy density and emitting zero greenhouse gases when in use, is particularly promising as an alternative for traditional fossil fuels. Electrochemical water splitting is an economical technology for producing sustainable and high-purity hydrogen gas. However, the intrinsically sluggish kinetics of the anode oxygen evolution reaction (OER) always decreases the efficiency of hydrogen production; the development of highly active and durable electrocatalysts with improved OER kinetics is thus desirable and crucial. Herein, Fe-based metal–organic framework (MOF)-Ni3S2 heterostructure nanocomposites are synthesized on a nickel foam (NF) substrate. The self-supporting Fe MOF-Ni3S2/NF catalyst shows excellent catalytic activities for OER. In alkaline media (1.0 M KOH), only 243 mV of overpotential is needed to reach the current density of 100 mA·cm–2. Even at the commercially viable high current densities of 500 and 1000 mA·cm–2, ultralow overpotentials of 283 and 309 mV are required, respectively. The catalytic activity of Fe MOF-Ni3S2/NF far exceeds that of the noble metal catalysts (e.g., RuO2) and most non-noble metal OER catalysts reported in the literature. In addition, the Fe MOF-Ni3S2/NF nanocomposite exhibits ultrahigh long-term stability at high current densities, with almost no activity attenuation in the chronopotentiometry test conducted at 100 mA·cm–2 and a negligible attenuation (23 mV) at 500 mA·cm–2 for 20 h. Our findings provide insights into designing and preparing cost-effective, highly active, and durable electrocatalysts for OER at high current densities. [ABSTRACT FROM AUTHOR]

Published
2023
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42. Single Amino Acid Substitution the DNA Repairing Gene Radiation-Sensitive 4 Contributes to Ultraviolet Tolerance of a Plant Pathogen

Author

Wang, Yan-Ping, Yang, Li-Na, Feng, Yuan-Yuan, Liu, Songqing, and Zhan, Jiasui

Subjects
Evolutionary Biology, Microbiology (Microbiology in the medical area to be 30109), Agricultural Science
Abstract

To successfully survive and reproduce, all species constantly modify the structure and expression of their genomes to cope with changing environmental conditions including ultraviolet (UV) radiation. Thus, knowledge of species adaptation to environmental changes is a central theme of evolutionary studies which could have important implication for disease management and social-ecological sustainability in the future but is generally insufficient. Here, we investigated the evolution of UV adaptation in organisms by population genetic analysis of sequence structure, physiochemistry, transcription, and fitness variation in the radiation-sensitive 4 (RAD4) gene of the Irish potato famine pathogen Phytophthora infestans sampled from various altitudes. We found that RAD4 is a key gene determining the resistance of the pathogen to UV stress as indicated by strong phenotype-genotype-geography associations and upregulated transcription after UV exposure. We also found conserved evolution in the RAD4 gene. Only five nucleotide haplotypes corresponding to three protein isoforms generated by point mutations were detected in the 140 sequences analyzed and the mutations were constrained to the N-terminal domain of the protein. Physiochemical changes associated with non-synonymous mutations generate severe fitness penalty to mutants, which are purged out by natural selection, leading to the conserved evolution observed in the gene.

Published
2022

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