Search

Your search keyword '"Zhang, Lejun"' showing total 402 results
Start Over Author "Zhang, Lejun"
402 results on '"Zhang, Lejun"'

1. An Entity Alignment Model for Echinococcosis Knowledge Graph

Author

Gao, Yuan, Zhang, Lejun, Xu, Fei, Ishdorj, Tseren-Onolt, Su, YanSen, Goos, Gerhard, Series Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Huang, De-Shuang, editor, Si, Zhanjun, editor, and Chen, Wei, editor

Published
2024
Full Text
View/download PDF

2. A Bitcoin Address Multi-classification Mechanism Based on Bipartite Graph-Based Maximization Consensus

Author

Zhang, Lejun, Zhang, Junjie, Toyoda, Kentaroh, Liu, Yuan, Qiu, Jing, Tian, Zhihong, Guo, Ran, Ceccarelli, Marco, Series Editor, Agrawal, Sunil K., Advisory Editor, Corves, Burkhard, Advisory Editor, Glazunov, Victor, Advisory Editor, Hernández, Alfonso, Advisory Editor, Huang, Tian, Advisory Editor, Jauregui Correa, Juan Carlos, Advisory Editor, Takeda, Yukio, Advisory Editor, and Li, Shaofan, editor

Published
2024
Full Text
View/download PDF

5. Extraction of Relationship Between Esophageal Cancer and Biomolecules Based on BioBERT

Author

Tan, Dayu, Yang, Yang, Wang, Minglu, Wang, Pengpeng, Zhang, Lejun, Ishdorj, Tseren-Onolt, Su, Yansen, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Huang, De-Shuang, editor, Premaratne, Prashan, editor, Jin, Baohua, editor, Qu, Boyang, editor, Jo, Kang-Hyun, editor, and Hussain, Abir, editor

Published
2023
Full Text
View/download PDF

6. Smart Contract Vulnerability Detection Model Based on Siamese Network

Author

Chen, Weijie, Guo, Ran, Wang, Guopeng, Zhang, Lejun, Qiu, Jing, Su, Shen, Liu, Yuan, Xu, Guangxia, Chen, Huiling, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Qiu, Meikang, editor, Lu, Zhihui, editor, and Zhang, Cheng, editor

Published
2023
Full Text
View/download PDF

7. An Efficient Detection Model for Smart Contract Reentrancy Vulnerabilities

Author

Li, Yuan, Guo, Ran, Wang, Guopeng, Zhang, Lejun, Qiu, Jing, Su, Shen, Liu, Yuan, Xu, Guangxia, Chen, Huiling, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Qiu, Meikang, editor, Lu, Zhihui, editor, and Zhang, Cheng, editor

Published
2023
Full Text
View/download PDF

10. Value driven Analysis Framework of Service Ecosystem Evolution Mechanism

Author

Xue, Xiao, Zhou, Deyu, Guo, Yaodan, Feng, Zhiyong, Zhang, Lejun, and Meng, Lin

Subjects
Computer Science - Other Computer Science
Abstract

With the development of cloud computing, service computing, IoT(Internet of Things) and mobile Internet, the diversity and sociality of services are increasingly apparent. To meet the customized user demands, Service Ecosystem is emerging as a complex social-technology system, which is formed with various IT services through cross-border integration. However, how to analyze and promote the evolution mechanism of service ecosystem is still a serious challenge in the field, which is of great significance to achieve the expected system evolution trends. Based on this, this paper proposes a value-driven analysis framework of service ecosystem, including value creation, value operation, value realization and value distribution. In addition, a computational experiment system is established to verify the effectiveness of the analysis framework, which stimulates the effect of different operation strategies on the value network in the service ecosystem. The result shows that our analysis framework can provide new means and ideas for the analysis of service ecosystem evolution, and can also support the design of operation strategies. Index, Comment: 14pages

Published
2020

33. The Research on Covert Communication Model Based on Blockchain: A Case Study of Ethereum’s Whisper Protocol

Author

Zhang, Zhijie, Zhang, Lejun, Rasheed, Waqas, Jin, Zilong, Ma, Tinghuai, Chen, Huiling, Xu, Guangquan, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Xu, Guangquan, editor, Liang, Kaitai, editor, and Su, Chunhua, editor

Published
2020
Full Text
View/download PDF

47. Using pyrite composition to track the multi-stage fluids superimposed on a porphyry Cu system.

Author

Wu, Chao, Cooke, David R., Baker, Michael J., Zhang, Lejun, Liang, Pei, Fang, Jing, Olin, Paul, Danyushevsky, Leonid V., and Chen, Huayong

Subjects
COPPER, PORPHYRY, PYRITES, HYDROTHERMAL alteration, OROGENIC belts
Abstract

The Yulekenhalasu porphyry Cu-Mo deposit (0.2 Mt Cu at 1.04 wt% and 0.012 Mt Mo at 0.06 wt%) is located in the Devonian Halasu copper belt, East Junggar block, northwest China. At Yulekenhalasu, Cu and Mo mineralization commonly occurs as disseminated sulfides or veinlets in porphyry-related alteration zones. Five alteration stages have been identified, including porphyry-type alteration, i.e., sodic-calcic (stage I), potassic (stage IIa), propylitic (stage IIb), and phyllic (stage III) alteration, and widespread late Cu sulfide-bearing veins (stage IV) cross-cutting porphyry-type alteration, plus a post-ore fault-controlled argillic alteration (stage V). Stages IV and V have overprinted porphyry-type alteration (stages I–III). Anomalous concentrations of trace elements in stage IIb pyrite (e.g., Ti, Zr, Gd, and Hf) are due to the presence of micro-inclusions (e.g., zircon and rutile) in the low-temperature (~200 °C) propylitic zone. Cu, Ag, Co, and Mn, occurring as stoichiometric substitutions or as tetrahedrite inclusions in overprinting stage IV pyrite, were sourced directly from the primary hydrothermal fluid. The enrichment of distal pathfinder elements (e.g., Cr, Au, and Tl) in overprinting stage V pyrite was caused by a low-temperature (~160 °C) hydrothermal event related to regional orogenic Au mineralization. The spatial variation of Se/S in pyrite among various paragenetic stages were influenced by changes in the hydrothermal fluid composition and temperature, with the latter having the effect of decreasing pyrite Se/S. Lower Se concentrations in pyrite of stages IIb and III close to the orebody are explained by relatively higher temperatures in the locus of mineralization. This may provide a potential vectoring tool to mineralization using pyrite geochemistry in porphyry deposits. Systematic thermodynamic calibrations were applied to pyrite compositions to fingerprint the corresponding Se/S and Co/Ni ratios of fluids and further to develop a complete metallogenic model for Yulekenhalasu. The Devonian diorite porphyry generated fluids that produced the early porphyry-type alteration. High Co/Fe (average ~1 × 10–4) and Ni/Fe (average ~3 × 10–6) ratios of fluid for late Cu sulfide-bearing veins, combined with higher Se/S (average ~6 ×x 10–7) than orogenic Au deposits (average ~3 × 10–8), indicate that the fluids possibly derived from a Late Devonian-Carboniferous mafic intrusion. Argillic alteration assemblages forming at ca. 280 Ma host pyrite relatively enriched in Au (average 0.1 ppm, with native gold inclusions). Therefore it is likely related to a regional orogenic gold mineralizing event in the Early Permian that overprinted Devonian mineralization. Although spatially contiguous, hydrothermal alteration and hypogene mineralizing stages identified herein represent discrete episodes of hydrothermal activities at Yulekenhalasu. The multi-stage alteration features observed at Yulekenhalasu may provide insights into the complete evolutionary history of Paleozoic porphyry Cu deposit systems in the Central Asian orogenic belt. This study contributes to a better understanding of the metallogenic and exploration models of porphyry Cu deposits overprinted by multi-stage hydrothermal events, which is economically important in Phanerozoic orogenic belts. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results