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197 results on '"Ding, Pengcheng"'

1. Hybrid Drawing Solutions in AR Bitmap-to-Vector Techniques on 3D Surfaces

Author

Ding, Pengcheng, Cheng, Yedian, and Prpa, Mirjana

Subjects
Computer Science - Graphics
Abstract

Recent advancements in augmented reality and virtual reality have significantly enhanced workflows for drawing 3D objects. Despite these technological strides, existing AR tools often lack the necessary precision and struggle to maintain quality when scaled, posing challenges for larger-scale drawing tasks. This paper introduces a novel AR tool that uniquely integrates bitmap drawing and vectorization techniques. This integration allows engineers to perform rapid, real-time drawings directly on 3D models, with the capability to vectorize the data for scalable accuracy and editable points, ensuring no loss in fidelity when modifying or resizing the drawings. We conducted user studies involving professional engineers, designers, and contractors to evaluate the tool's integration into existing workflows, its usability, and its impact on project outcomes. The results demonstrate that our enhancements significantly improve the efficiency of drawing processes. Specifically, the ability to perform quick, editable, and scalable drawings directly on 3D models not only enhances productivity but also ensures adaptability across various project sizes and complexities., Comment: 23 pages

Published
2024

3. Research on the Influence of Curved Shield Tunneling Construction on the Deformation of Existing Bridge Piles

Author

Fu, Qingqu, Zheng, Xuanrong, Ding, Pengcheng, Zheng, Zheng, Editor-in-Chief, Xi, Zhiyu, Associate Editor, Gong, Siqian, Series Editor, Hong, Wei-Chiang, Series Editor, Mellal, Mohamed Arezki, Series Editor, Narayanan, Ramadas, Series Editor, Nguyen, Quang Ngoc, Series Editor, Ong, Hwai Chyuan, Series Editor, Sun, Zaicheng, Series Editor, Ullah, Sharif, Series Editor, Wu, Junwei, Series Editor, Zhang, Baochang, Series Editor, Zhang, Wei, Series Editor, Zhu, Quanxin, Series Editor, Zheng, Wei, Series Editor, Xiang, Ping, editor, Yang, Haifeng, editor, Yan, Jianwei, editor, and Ding, Faxing, editor

Published
2024
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5. On-Surface Decarboxylation Coupling Facilitated by Lock-to-Unlock Variation of Molecules upon the Reaction

Author

Wang, Shaoshan, Li, Zhuo, Ding, Pengcheng, Mattioli, Cristina, Huang, Wujun, Wang, Yang, Gourdon, André, Sun, Ye, Chen, Mingshu, Kantorovich, Lev, Yang, Xueming, Rosei, Federico, and Yu, Miao

Subjects
Physics - Chemical Physics
Abstract

On-surface synthesis (OSS) involving relatively high energy barriers remains challenging due to a typical dilemma: firm molecular anchor is required to prevent molecular desorption upon the reaction, whereas sufficient lateral mobility is crucial for subsequent coupling and assembly. By locking the molecular precursors on the substrate then unlocking them during the reaction, we present a strategy to address this challenge. High-yield synthesis based on well-defined decarboxylation, intermediate transition and hexamerization is demonstrated, resulting in an extended and ordered network exclusively composed of the newly-synthesized macrocyclic compound. Thanks to the steric hindrance of its maleimide group, we attain a preferential selection of the coupling. This work unlocks a promising path to enrich the reaction types and improve the coupling selectivity hence the structual homogeneity of the final product for OSS.

Published
2021

6. Subsurface Carbon-Induced Local Charge of Copper for On-Surface Displacement Reaction

Author

Wang, Shaoshan, Ding, Pengcheng, Li, Zhuo, Mattioli, Cristina, E, Wenlong, Sun, Ye, Gourdon, André, Kantorovich, Lev, Besenbacher, Flemming, Yang, Xueming, and Yu, Miao

Subjects
Condensed Matter - Other Condensed Matter, Physics - Chemical Physics
Abstract

Transition metal carbides have sparked unprecedented enthusiasm as high-performance catalysts in recent years. Still, the catalytic properties of copper (Cu) carbide remain unexplored. By introducing subsurface carbon (C) to Cu(111), displacement reaction of proton in carboxyl acid group with single Cu atom is demonstrated at the atomic scale and room temperature. Its occurrence is attributed to the C-doping induced local charge of surface Cu atoms (up to +0.30 e/atom), which accelerates the rate of on-surface deprotonation via reduction of the corresponding energy barrier, thus enabling the instant displacement of a proton with a Cu atom when the molecules land on the surface. Such well-defined and robust Cu$^{\delta +}$ surface based on the subsurface C doping offers a novel catalytic platform for on-surface synthesis., Comment: Angewandte Chemie International Edition, Wiley-VCH Verlag, 2021

Published
2021
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19. Formation of Supernarrow Borophene Nanoribbons

Author

Wang, Haochen, primary, Ding, Pengcheng, additional, Xia, Guang-Jie, additional, Zhao, Xiangyun, additional, E, Wenlong, additional, Yu, Miao, additional, Ma, Zhibo, additional, Wang, Yang-Gang, additional, Wang, Lai-Sheng, additional, Li, Jun, additional, and Yang, Xueming, additional

Published
2024
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23. Functional Framework of Amino Acid Transporters in Quinoa: Genome-Wide Survey, Homology, and Stress Response.

Author

Li, Linghong, Huang, Jianxun, Zhang, Yulai, Yang, Xinhui, Gou, Tong, Ren, Aixia, Ding, Pengcheng, Wu, Xiangyun, Sun, Min, and Gao, Zhiqiang

Subjects
AMINO acid transport, GENE expression, AMINO acid metabolism, GENE families, CHROMOSOME duplication, QUINOA
Abstract

The role of amino acid transporter (AAT) genes in facilitating the transmembrane movement of amino acids between cells and various cellular components has been characterized in several plant species. Quinoa (Chenopodium quinoa Willd.), a renowned nutritious crop known for its amino acid composition, has not yet had its AAT genes characterized. Therefore, the identification and characterization of AAT genes in quinoa will help bridge this knowledge gap and offer valuable insights into the genetic mechanisms underlying amino acid transport and metabolism. This study focuses on gene expression, gene structure, duplication events, and a comparison of functions studied to establish the role of AAT genes. A total of 160 non-redundant AAT genes were identified in quinoa and classified into 12 subfamilies, with 8 subfamilies belonging to the amino acid/auxin permease (AAAP) family and 4 to the amino acid-polyamine-organocation (APC) superfamily family. The chromosomal localization, gene structures, and conserved motifs of these genes were systematically analyzed. Expression profiling revealed diverse expression patterns across various tissues and in response to drought and salt stresses. Segmental and tandem duplications were found to contribute to the gene duplication and expansion of the CqAAT gene family. Additionally, CqCAT6 and CqAAP1 were predicted to regulate the long-distance transportation and distribution of amino acids, making them potential candidate genes for further research. Overall, this information could serve as a foundation for the identification and utilization of CqAATs in Quinoa, enhancing our understanding of amino acid transport mechanisms in this important crop. [ABSTRACT FROM AUTHOR]

Published
2024
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24. Phenotypic Characterization and Yield Screening of Quinoa Germplasms in Diverse Low-Altitude Regions: A Preliminary Study.

Author

Ren, Aixia, Jiang, Zhijun, Dai, Jing, Sun, Min, Anwar, Sumera, Tang, Peng, Wang, Rongzhen, Ding, Pengcheng, Li, Linghong, Wu, Xiangyun, and Gao, Zhiqiang

Subjects
GRAIN yields, GENOTYPES, GERMPLASM, ALTITUDES, PHENOLOGY, QUINOA
Abstract

In this study, 300 quinoa accessions were systematically screened for adaptation to low-altitude areas using seventeen traits. The experiment was conducted in Taigu District, Jinzhong City, Shanxi Province, in 2021, at an altitude of 791 m. Out of the 300 genotypes, 107 were able to produce flowers and fruit, with yields ranging from 538 to 5132 kg ha−1 and with 1000-grain weights between 1.19 g and 2.37 g. These 107 quinoa genotypes were categorized into four groups based on grain yield: below 1500, 1500–2250, 2250–3000, and above 3000 kg ha−1. These groups consisted of 33, 33, 24, and 17 genotypes, respectively. This study found that the 1000-grain weight ranged from 1.19 g to 2.37 g, with an average of 1.72 g, 1.72 g, 1.83 g, and 1.92 g for the respective yield levels. Among the 107 genotypes, 25 had a 1000-grain weight exceeding 2 g, and 13 of these genotypes also had yields exceeding 2250 kg ha−1. The growth period of quinoa genotypes in the low-altitude area was approximately 138–142 days, with longer growth periods associated with higher yield levels. JQ-00084 is the only genotype with a yield > 3000 kg ha−1 and meets all the growth criteria, including a 1000-grain weight exceeding 2 g and a flowering-to-maturity period of over 80 days. Meanwhile, JQ-00315, JQ-00521, JQ-1029, and JQ-02405 fulfilled at least four criteria. These results highlight the importance of germplasm screening for low altitudes, and a large set of germplasms could be screened using the above criteria of phenology, growth, and yield traits. [ABSTRACT FROM AUTHOR]

Published
2024
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25. Genome-wide identification, phylogeny and expression analysis of the R2R3-MYB gene family in quinoa (Chenopodium quinoa) under abiotic stress

Author

Ding, Pengcheng, primary, Tang, Peng, additional, Li, Xiaofen, additional, Haroon, Adeela, additional, Nasreen, Saima, additional, Noor, Hafeez, additional, Attia, Kotb A., additional, Abushady, Asmaa M., additional, Wang, Rongzhen, additional, Cui, Kaiyuan, additional, Wu, Xiangyun, additional, Sun, Min, additional, and Gao, Zhiqiang, additional

Published
2024
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35. Does F4TCNQ Adsorption on Cu(111) Form a 2D-MOF?

Author

Ding, Pengcheng, primary, Braim, Mona, additional, Hobson, A. L., additional, Rochford, L. A., additional, Ryan, P. T. P., additional, Duncan, D. A., additional, Lee, T.-L., additional, Hussain, H., additional, Costantini, G., additional, Yu, Miao, additional, and Woodruff, D. P., additional

Published
2023
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42. Study of glutathione S-transferase (CqGSTs) gene expression patterns, the response of basic helix–loop–helix (bHLH)transcription factor and genome-wide identification gene family in quinoa (Chenopodium quinoaWilld.) and its mechanisms of salt stress tolerance

Author

Cui, Kaiyuan, Noor, Hafeez, Noor, Fida, Ding, Pengcheng, Sun, Min, and Gao, Zhiqiang

Abstract

Quinoa grains are nutritionally rich and balanced, rich in protein, starch, VB1, folic acid, minerals (Ca, Zn, Fe) and other nutrients and grow at high altitude (> 3500 m above sea level) all year round; it is subjected to drought, low temperature, salt and other abiotic stresses during its growth and development; basic helix–loop–helix (bHLH) family is the second largest gene family in plants and is involved in many biological processes such as plant growth, development, metabolism and resistance to abiotic stress. In bioinformatics and expression analysis of glutathione S-transferase (GST) gene in quinoa in this study, 114 CqGSTgenes were identified from the whole genome of quinoa by bioinformatics methods. The phylogenetic tree showed that 114 CqGSTgenes were divided into seven subgroups. Phylogenetic analysis of these genes suggested that tandem and fragment replication events played a key role in the expansion of the CqGSTsgene family, and the CqGSTgenes may have undergone strong purification selection during the evolution process. Analysis of salt-treated transcriptome from the roots of salt-tolerant and salt-sensitive quinoa cultivars showed that salt treatment induced changes in the expression levels of CqGSTsgenes. By comparing the sequences of the bHLHgene family members of Arabidopsis thaliana and the bHLHtranscription factor family members Quinoa most of the bHLHtranscription factors of quinoa have high homology with that of Arabidopsis thaliana. The number of exons contained in CqGSTgene ranged from 1 to 14, among which CqGSTL2contained 14 exons, indicating that CqGSTL2contained 14 exons, the gene with the highest number of exons, respectively. The number of exons in six CqGSTZmembers was significantly different, including three members have two exons and three have nine exons. Studies on chromosome distribution are that except for no CqGSTgene on chromosome 09, all the other chromosomes were identical; there was CqGSTgene distribution, and chromosome 07 contains 20 CqGSTgenes, which was one of CqGSTgene distribution. CqGSTL1and CqGSTU1cannot locate specific chromosomes due to the quality of the genome. In order to explore the expression pattern of GST gene, different tissues or RNA-seq data of Quinoa from various developmental stages of organs were systematically analyzed. In class U, CqGSTU22, CqGSTU67, CqGSTU43,CqGSTU42, CqGSTU15, in class L, CqGSTL1and CqGSTL5, in class Z, CqGSTZ5, DHAR class CqDHAR2and CqDHAR3were strongly expressed in various varieties tissues and organs. The CqGST, U66, CqGSTF20and CqGSTF23were not expressed in the 11 tissues or organs tested. Related to the temporal and spatial expression patterns of these genes, there were multiple genes in each type in the seedlings medium and high expression such as CqGSTL4, CqGSTL6, respectively.

Published
2024
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